Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

162 files changed, 34317 insertions, 0 deletions

diff --git a/vendor/rustix/src/backend/libc/c.rs b/vendor/rustix/src/backend/libc/c.rs
new file mode 100644
index 0000000..d3a1e5f
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/c.rs
@@ -0,0 +1,468 @@
+//! Libc and supplemental types and constants.
+
+#![allow(unused_imports)]
+
+// Import everything from libc, but we'll add some stuff and override some
+// things below.
+pub(crate) use libc::*;
+
+/// `PROC_SUPER_MAGIC`—The magic number for the procfs filesystem.
+#[cfg(all(linux_kernel, target_env = "musl"))]
+pub(crate) const PROC_SUPER_MAGIC: u32 = 0x0000_9fa0;
+
+/// `NFS_SUPER_MAGIC`—The magic number for the NFS filesystem.
+#[cfg(all(linux_kernel, target_env = "musl"))]
+pub(crate) const NFS_SUPER_MAGIC: u32 = 0x0000_6969;
+
+#[cfg(feature = "process")]
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) const EXIT_SIGNALED_SIGABRT: c_int = 128 + SIGABRT as c_int;
+
+// TODO: Upstream these.
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_TSN: c_int = linux_raw_sys::if_ether::ETH_P_TSN as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_ERSPAN2: c_int = linux_raw_sys::if_ether::ETH_P_ERSPAN2 as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_ERSPAN: c_int = linux_raw_sys::if_ether::ETH_P_ERSPAN as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_PROFINET: c_int = linux_raw_sys::if_ether::ETH_P_PROFINET as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_REALTEK: c_int = linux_raw_sys::if_ether::ETH_P_REALTEK as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_ETHERCAT: c_int = linux_raw_sys::if_ether::ETH_P_ETHERCAT as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_PREAUTH: c_int = linux_raw_sys::if_ether::ETH_P_PREAUTH as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_LLDP: c_int = linux_raw_sys::if_ether::ETH_P_LLDP as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_MRP: c_int = linux_raw_sys::if_ether::ETH_P_MRP as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_NCSI: c_int = linux_raw_sys::if_ether::ETH_P_NCSI as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_CFM: c_int = linux_raw_sys::if_ether::ETH_P_CFM as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_IBOE: c_int = linux_raw_sys::if_ether::ETH_P_IBOE as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_HSR: c_int = linux_raw_sys::if_ether::ETH_P_HSR as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_NSH: c_int = linux_raw_sys::if_ether::ETH_P_NSH as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_DSA_8021Q: c_int = linux_raw_sys::if_ether::ETH_P_DSA_8021Q as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_DSA_A5PSW: c_int = linux_raw_sys::if_ether::ETH_P_DSA_A5PSW as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_IFE: c_int = linux_raw_sys::if_ether::ETH_P_IFE as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_CAN: c_int = linux_raw_sys::if_ether::ETH_P_CAN as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_CANXL: c_int = linux_raw_sys::if_ether::ETH_P_CANXL as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_XDSA: c_int = linux_raw_sys::if_ether::ETH_P_XDSA as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_MAP: c_int = linux_raw_sys::if_ether::ETH_P_MAP as _;
+#[cfg(all(linux_kernel, feature = "net"))]
+pub(crate) const ETH_P_MCTP: c_int = linux_raw_sys::if_ether::ETH_P_MCTP as _;
+
+#[cfg(all(
+    linux_kernel,
+    any(
+        target_arch = "mips",
+        target_arch = "mips32r6",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "sparc",
+        target_arch = "sparc64"
+    )
+))]
+pub(crate) const SIGEMT: c_int = linux_raw_sys::general::SIGEMT as _;
+
+// TODO: Upstream these.
+#[cfg(all(linux_kernel, feature = "termios"))]
+pub(crate) const IUCLC: tcflag_t = linux_raw_sys::general::IUCLC as _;
+#[cfg(all(linux_kernel, feature = "termios"))]
+pub(crate) const XCASE: tcflag_t = linux_raw_sys::general::XCASE as _;
+
+#[cfg(target_os = "aix")]
+pub(crate) const MSG_DONTWAIT: c_int = libc::MSG_NONBLOCK;
+
+// TODO: Remove once https://github.com/rust-lang/libc/pull/3377 is merged and released.
+#[cfg(target_os = "netbsd")]
+#[cfg(feature = "net")]
+pub(crate) const SO_NOSIGPIPE: c_int = 0x0800;
+
+// On PowerPC, the regular `termios` has the `termios2` fields and there is no
+// `termios2`. linux-raw-sys has aliases `termios2` to `termios` to cover this
+// difference, but we still need to manually import it since `libc` doesn't
+// have this.
+#[cfg(all(
+    linux_kernel,
+    feature = "termios",
+    any(target_arch = "powerpc", target_arch = "powerpc64")
+))]
+pub(crate) use {
+    linux_raw_sys::general::{termios2, CIBAUD},
+    linux_raw_sys::ioctl::{TCGETS2, TCSETS2, TCSETSF2, TCSETSW2},
+};
+
+// Automatically enable “large file” support (LFS) features.
+
+#[cfg(target_os = "vxworks")]
+pub(super) use libc::_Vx_ticks64_t as _Vx_ticks_t;
+#[cfg(linux_kernel)]
+pub(super) use libc::fallocate64 as fallocate;
+#[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+#[cfg(any(linux_like, target_os = "aix"))]
+pub(super) use libc::open64 as open;
+#[cfg(any(
+    linux_kernel,
+    target_os = "aix",
+    target_os = "hurd",
+    target_os = "l4re"
+))]
+pub(super) use libc::posix_fallocate64 as posix_fallocate;
+#[cfg(any(all(linux_like, not(target_os = "android")), target_os = "aix"))]
+pub(super) use libc::{blkcnt64_t as blkcnt_t, rlim64_t as rlim_t};
+// TODO: AIX has `stat64x`, `fstat64x`, `lstat64x`, and `stat64xat`; add them
+// to the upstream libc crate and implement rustix's `statat` etc. with them.
+#[cfg(target_os = "aix")]
+pub(super) use libc::{
+    blksize64_t as blksize_t, fstat64 as fstat, fstatfs64 as fstatfs, fstatvfs64 as fstatvfs,
+    ftruncate64 as ftruncate, getrlimit64 as getrlimit, ino_t, lseek64 as lseek, mmap,
+    off64_t as off_t, openat, posix_fadvise64 as posix_fadvise, preadv, pwritev,
+    rlimit64 as rlimit, setrlimit64 as setrlimit, stat64at as fstatat, statfs64 as statfs,
+    statvfs64 as statvfs, RLIM_INFINITY,
+};
+#[cfg(any(linux_like, target_os = "hurd"))]
+pub(super) use libc::{
+    fstat64 as fstat, fstatat64 as fstatat, fstatfs64 as fstatfs, fstatvfs64 as fstatvfs,
+    ftruncate64 as ftruncate, getrlimit64 as getrlimit, ino64_t as ino_t, lseek64 as lseek,
+    mmap64 as mmap, off64_t as off_t, openat64 as openat, posix_fadvise64 as posix_fadvise,
+    rlimit64 as rlimit, setrlimit64 as setrlimit, statfs64 as statfs, statvfs64 as statvfs,
+    RLIM64_INFINITY as RLIM_INFINITY,
+};
+#[cfg(apple)]
+pub(super) use libc::{
+    host_info64_t as host_info_t, host_statistics64 as host_statistics,
+    vm_statistics64_t as vm_statistics_t,
+};
+#[cfg(not(all(
+    linux_kernel,
+    any(
+        target_pointer_width = "32",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    )
+)))]
+#[cfg(any(linux_like, target_os = "aix", target_os = "hurd"))]
+pub(super) use libc::{lstat64 as lstat, stat64 as stat};
+#[cfg(any(
+    linux_kernel,
+    target_os = "aix",
+    target_os = "hurd",
+    target_os = "emscripten"
+))]
+pub(super) use libc::{pread64 as pread, pwrite64 as pwrite};
+#[cfg(any(target_os = "linux", target_os = "hurd", target_os = "emscripten"))]
+pub(super) use libc::{preadv64 as preadv, pwritev64 as pwritev};
+
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+pub(super) unsafe fn prlimit(
+    pid: libc::pid_t,
+    resource: libc::__rlimit_resource_t,
+    new_limit: *const libc::rlimit64,
+    old_limit: *mut libc::rlimit64,
+) -> libc::c_int {
+    // `prlimit64` wasn't supported in glibc until 2.13.
+    weak_or_syscall! {
+        fn prlimit64(
+            pid: libc::pid_t,
+            resource: libc::__rlimit_resource_t,
+            new_limit: *const libc::rlimit64,
+            old_limit: *mut libc::rlimit64
+        ) via SYS_prlimit64 -> libc::c_int
+    }
+
+    prlimit64(pid, resource, new_limit, old_limit)
+}
+
+#[cfg(all(target_os = "linux", target_env = "musl"))]
+pub(super) unsafe fn prlimit(
+    pid: libc::pid_t,
+    resource: libc::c_int,
+    new_limit: *const libc::rlimit64,
+    old_limit: *mut libc::rlimit64,
+) -> libc::c_int {
+    weak_or_syscall! {
+        fn prlimit64(
+            pid: libc::pid_t,
+            resource: libc::c_int,
+            new_limit: *const libc::rlimit64,
+            old_limit: *mut libc::rlimit64
+        ) via SYS_prlimit64 -> libc::c_int
+    }
+
+    prlimit64(pid, resource, new_limit, old_limit)
+}
+
+#[cfg(target_os = "android")]
+pub(super) unsafe fn prlimit(
+    pid: libc::pid_t,
+    resource: libc::c_int,
+    new_limit: *const libc::rlimit64,
+    old_limit: *mut libc::rlimit64,
+) -> libc::c_int {
+    weak_or_syscall! {
+        fn prlimit64(
+            pid: libc::pid_t,
+            resource: libc::c_int,
+            new_limit: *const libc::rlimit64,
+            old_limit: *mut libc::rlimit64
+        ) via SYS_prlimit64 -> libc::c_int
+    }
+
+    prlimit64(pid, resource, new_limit, old_limit)
+}
+
+#[cfg(target_os = "android")]
+mod readwrite_pv64 {
+    use super::*;
+
+    pub(in super::super) unsafe fn preadv64(
+        fd: libc::c_int,
+        iov: *const libc::iovec,
+        iovcnt: libc::c_int,
+        offset: libc::off64_t,
+    ) -> libc::ssize_t {
+        // Older Android libc lacks `preadv64`, so use the `weak!` mechanism to
+        // test for it, and call back to `libc::syscall`. We don't use
+        // `weak_or_syscall` here because we need to pass the 64-bit offset
+        // specially.
+        weak! {
+            fn preadv64(libc::c_int, *const libc::iovec, libc::c_int, libc::off64_t) -> libc::ssize_t
+        }
+        if let Some(fun) = preadv64.get() {
+            fun(fd, iov, iovcnt, offset)
+        } else {
+            // Unlike the plain "p" functions, the "pv" functions pass their
+            // offset in an endian-independent way, and always in two registers.
+            syscall! {
+                fn preadv(
+                    fd: libc::c_int,
+                    iov: *const libc::iovec,
+                    iovcnt: libc::c_int,
+                    offset_lo: usize,
+                    offset_hi: usize
+                ) via SYS_preadv -> libc::ssize_t
+            }
+            preadv(fd, iov, iovcnt, offset as usize, (offset >> 32) as usize)
+        }
+    }
+    pub(in super::super) unsafe fn pwritev64(
+        fd: libc::c_int,
+        iov: *const libc::iovec,
+        iovcnt: libc::c_int,
+        offset: libc::off64_t,
+    ) -> libc::ssize_t {
+        // See the comments in `preadv64`.
+        weak! {
+            fn pwritev64(libc::c_int, *const libc::iovec, libc::c_int, libc::off64_t) -> libc::ssize_t
+        }
+        if let Some(fun) = pwritev64.get() {
+            fun(fd, iov, iovcnt, offset)
+        } else {
+            // Unlike the plain "p" functions, the "pv" functions pass their
+            // offset in an endian-independent way, and always in two registers.
+            syscall! {
+                fn pwritev(
+                    fd: libc::c_int,
+                    iov: *const libc::iovec,
+                    iovcnt: libc::c_int,
+                    offset_lo: usize,
+                    offset_hi: usize
+                ) via SYS_pwritev -> libc::ssize_t
+            }
+            pwritev(fd, iov, iovcnt, offset as usize, (offset >> 32) as usize)
+        }
+    }
+}
+#[cfg(target_os = "android")]
+pub(super) use readwrite_pv64::{preadv64 as preadv, pwritev64 as pwritev};
+
+// macOS added `preadv` and `pwritev` in version 11.0.
+#[cfg(apple)]
+mod readwrite_pv {
+    weakcall! {
+        pub(in super::super) fn preadv(
+            fd: libc::c_int,
+            iov: *const libc::iovec,
+            iovcnt: libc::c_int,
+            offset: libc::off_t
+        ) -> libc::ssize_t
+    }
+    weakcall! {
+        pub(in super::super) fn pwritev(
+            fd: libc::c_int,
+            iov: *const libc::iovec,
+            iovcnt: libc::c_int, offset: libc::off_t
+        ) -> libc::ssize_t
+    }
+}
+#[cfg(apple)]
+pub(super) use readwrite_pv::{preadv, pwritev};
+
+// glibc added `preadv64v2` and `pwritev64v2` in version 2.26.
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+mod readwrite_pv64v2 {
+    use super::*;
+
+    pub(in super::super) unsafe fn preadv64v2(
+        fd: libc::c_int,
+        iov: *const libc::iovec,
+        iovcnt: libc::c_int,
+        offset: libc::off64_t,
+        flags: libc::c_int,
+    ) -> libc::ssize_t {
+        // Older glibc lacks `preadv64v2`, so use the `weak!` mechanism to
+        // test for it, and call back to `libc::syscall`. We don't use
+        // `weak_or_syscall` here because we need to pass the 64-bit offset
+        // specially.
+        weak! {
+            fn preadv64v2(libc::c_int, *const libc::iovec, libc::c_int, libc::off64_t, libc::c_int) -> libc::ssize_t
+        }
+        if let Some(fun) = preadv64v2.get() {
+            fun(fd, iov, iovcnt, offset, flags)
+        } else {
+            // Unlike the plain "p" functions, the "pv" functions pass their
+            // offset in an endian-independent way, and always in two registers.
+            syscall! {
+                fn preadv2(
+                    fd: libc::c_int,
+                    iov: *const libc::iovec,
+                    iovcnt: libc::c_int,
+                    offset_lo: usize,
+                    offset_hi: usize,
+                    flags: libc::c_int
+                ) via SYS_preadv2 -> libc::ssize_t
+            }
+            preadv2(
+                fd,
+                iov,
+                iovcnt,
+                offset as usize,
+                (offset >> 32) as usize,
+                flags,
+            )
+        }
+    }
+    pub(in super::super) unsafe fn pwritev64v2(
+        fd: libc::c_int,
+        iov: *const libc::iovec,
+        iovcnt: libc::c_int,
+        offset: libc::off64_t,
+        flags: libc::c_int,
+    ) -> libc::ssize_t {
+        // See the comments in `preadv64v2`.
+        weak! {
+            fn pwritev64v2(libc::c_int, *const libc::iovec, libc::c_int, libc::off64_t, libc::c_int) -> libc::ssize_t
+        }
+        if let Some(fun) = pwritev64v2.get() {
+            fun(fd, iov, iovcnt, offset, flags)
+        } else {
+            // Unlike the plain "p" functions, the "pv" functions pass their
+            // offset in an endian-independent way, and always in two registers.
+            syscall! {
+                fn pwritev2(
+                    fd: libc::c_int,
+                    iov: *const libc::iovec,
+                    iovec: libc::c_int,
+                    offset_lo: usize,
+                    offset_hi: usize,
+                    flags: libc::c_int
+                ) via SYS_pwritev2 -> libc::ssize_t
+            }
+            pwritev2(
+                fd,
+                iov,
+                iovcnt,
+                offset as usize,
+                (offset >> 32) as usize,
+                flags,
+            )
+        }
+    }
+}
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+pub(super) use readwrite_pv64v2::{preadv64v2 as preadv2, pwritev64v2 as pwritev2};
+
+// On non-glibc, assume we don't have `pwritev2`/`preadv2` in libc and use
+// `c::syscall` instead.
+#[cfg(any(
+    target_os = "android",
+    all(target_os = "linux", not(target_env = "gnu")),
+))]
+mod readwrite_pv64v2 {
+    use super::*;
+
+    pub(in super::super) unsafe fn preadv64v2(
+        fd: libc::c_int,
+        iov: *const libc::iovec,
+        iovcnt: libc::c_int,
+        offset: libc::off64_t,
+        flags: libc::c_int,
+    ) -> libc::ssize_t {
+        // Unlike the plain "p" functions, the "pv" functions pass their offset
+        // in an endian-independent way, and always in two registers.
+        syscall! {
+            fn preadv2(
+                fd: libc::c_int,
+                iov: *const libc::iovec,
+                iovcnt: libc::c_int,
+                offset_lo: usize,
+                offset_hi: usize,
+                flags: libc::c_int
+            ) via SYS_preadv2 -> libc::ssize_t
+        }
+        preadv2(
+            fd,
+            iov,
+            iovcnt,
+            offset as usize,
+            (offset >> 32) as usize,
+            flags,
+        )
+    }
+    pub(in super::super) unsafe fn pwritev64v2(
+        fd: libc::c_int,
+        iov: *const libc::iovec,
+        iovcnt: libc::c_int,
+        offset: libc::off64_t,
+        flags: libc::c_int,
+    ) -> libc::ssize_t {
+        // Unlike the plain "p" functions, the "pv" functions pass their offset
+        // in an endian-independent way, and always in two registers.
+        syscall! {
+            fn pwritev2(
+                fd: libc::c_int,
+                iov: *const libc::iovec,
+                iovcnt: libc::c_int,
+                offset_lo: usize,
+                offset_hi: usize,
+                flags: libc::c_int
+            ) via SYS_pwritev2 -> libc::ssize_t
+        }
+        pwritev2(
+            fd,
+            iov,
+            iovcnt,
+            offset as usize,
+            (offset >> 32) as usize,
+            flags,
+        )
+    }
+}
+#[cfg(any(
+    target_os = "android",
+    all(target_os = "linux", not(target_env = "gnu")),
+))]
+pub(super) use readwrite_pv64v2::{preadv64v2 as preadv2, pwritev64v2 as pwritev2};
diff --git a/vendor/rustix/src/backend/libc/conv.rs b/vendor/rustix/src/backend/libc/conv.rs
new file mode 100644
index 0000000..2539510
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/conv.rs
@@ -0,0 +1,247 @@
+//! Libc call arguments and return values are often things like `c_int`,
+//! `c_uint`, or libc-specific pointer types. This module provides functions
+//! for converting between rustix's types and libc types.
+
+use super::c;
+#[cfg(all(feature = "alloc", not(any(windows, target_os = "espidf"))))]
+use super::fd::IntoRawFd;
+use super::fd::{AsRawFd, BorrowedFd, FromRawFd, LibcFd, OwnedFd, RawFd};
+#[cfg(not(windows))]
+use crate::ffi::CStr;
+use crate::io;
+
+#[cfg(not(windows))]
+#[inline]
+pub(super) fn c_str(c: &CStr) -> *const c::c_char {
+    c.as_ptr()
+}
+
+#[cfg(not(any(windows, target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+#[inline]
+pub(super) fn no_fd() -> LibcFd {
+    -1
+}
+
+#[inline]
+pub(super) fn borrowed_fd(fd: BorrowedFd<'_>) -> LibcFd {
+    fd.as_raw_fd() as LibcFd
+}
+
+#[cfg(all(
+    feature = "alloc",
+    not(any(windows, target_os = "espidf", target_os = "redox"))
+))]
+#[inline]
+pub(super) fn owned_fd(fd: OwnedFd) -> LibcFd {
+    fd.into_raw_fd() as LibcFd
+}
+
+#[inline]
+pub(super) fn ret(raw: c::c_int) -> io::Result<()> {
+    if raw == 0 {
+        Ok(())
+    } else {
+        Err(io::Errno::last_os_error())
+    }
+}
+
+#[cfg(apple)]
+#[inline]
+pub(super) fn nonnegative_ret(raw: c::c_int) -> io::Result<()> {
+    if raw >= 0 {
+        Ok(())
+    } else {
+        Err(io::Errno::last_os_error())
+    }
+}
+
+#[cfg(not(any(windows, target_os = "wasi")))]
+#[inline]
+pub(super) unsafe fn ret_infallible(raw: c::c_int) {
+    debug_assert_eq!(raw, 0, "unexpected error: {:?}", io::Errno::last_os_error());
+}
+
+#[inline]
+pub(super) fn ret_c_int(raw: c::c_int) -> io::Result<c::c_int> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(raw)
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(super) fn ret_u32(raw: c::c_int) -> io::Result<u32> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(raw as u32)
+    }
+}
+
+#[inline]
+pub(super) fn ret_usize(raw: c::ssize_t) -> io::Result<usize> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        debug_assert!(raw >= 0);
+        Ok(raw as usize)
+    }
+}
+
+#[cfg(not(windows))]
+#[cfg(feature = "fs")]
+#[inline]
+pub(super) fn ret_off_t(raw: c::off_t) -> io::Result<c::off_t> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(raw)
+    }
+}
+
+#[cfg(not(any(windows, target_os = "wasi")))]
+#[inline]
+pub(super) fn ret_pid_t(raw: c::pid_t) -> io::Result<c::pid_t> {
+    if raw == -1 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(raw)
+    }
+}
+
+/// Convert a `c_int` returned from a libc function to an `OwnedFd`, if valid.
+///
+/// # Safety
+///
+/// The caller must ensure that this is the return value of a libc function
+/// which returns an owned file descriptor.
+#[inline]
+pub(super) unsafe fn ret_owned_fd(raw: LibcFd) -> io::Result<OwnedFd> {
+    if raw == !0 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(OwnedFd::from_raw_fd(raw as RawFd))
+    }
+}
+
+#[cfg(not(any(windows, target_os = "wasi")))]
+#[inline]
+pub(super) fn ret_discarded_fd(raw: LibcFd) -> io::Result<()> {
+    if raw == !0 {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(())
+    }
+}
+
+#[cfg(all(feature = "alloc", not(any(windows, target_os = "wasi"))))]
+#[inline]
+pub(super) fn ret_discarded_char_ptr(raw: *mut c::c_char) -> io::Result<()> {
+    if raw.is_null() {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(())
+    }
+}
+
+/// Convert the buffer-length argument value of a `send` or `recv` call.
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+#[inline]
+pub(super) fn send_recv_len(len: usize) -> usize {
+    len
+}
+
+/// Convert the buffer-length argument value of a `send` or `recv` call.
+#[cfg(windows)]
+#[inline]
+pub(super) fn send_recv_len(len: usize) -> i32 {
+    // On Windows, the length argument has type `i32`; saturate the length,
+    // since `send` and `recv` are allowed to send and recv less data than
+    // requested.
+    len.try_into().unwrap_or(i32::MAX)
+}
+
+/// Convert the return value of a `send` or `recv` call.
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+#[inline]
+pub(super) fn ret_send_recv(len: isize) -> io::Result<usize> {
+    ret_usize(len)
+}
+
+/// Convert the return value of a `send` or `recv` call.
+#[cfg(windows)]
+#[inline]
+pub(super) fn ret_send_recv(len: i32) -> io::Result<usize> {
+    ret_usize(len as isize)
+}
+
+/// Convert the value to the `msg_iovlen` field of a `msghdr` struct.
+#[cfg(all(
+    not(any(windows, target_os = "espidf", target_os = "redox", target_os = "wasi")),
+    any(
+        target_os = "android",
+        all(target_os = "linux", not(target_env = "musl"))
+    )
+))]
+#[inline]
+pub(super) fn msg_iov_len(len: usize) -> c::size_t {
+    len
+}
+
+/// Convert the value to the `msg_iovlen` field of a `msghdr` struct.
+#[cfg(all(
+    not(any(
+        windows,
+        target_os = "espidf",
+        target_os = "redox",
+        target_os = "vita",
+        target_os = "wasi"
+    )),
+    not(any(
+        target_os = "android",
+        all(target_os = "linux", not(target_env = "musl"))
+    ))
+))]
+#[inline]
+pub(crate) fn msg_iov_len(len: usize) -> c::c_int {
+    len.try_into().unwrap_or(c::c_int::MAX)
+}
+
+/// Convert the value to a `socklen_t`.
+#[cfg(any(
+    bsd,
+    solarish,
+    target_env = "musl",
+    target_os = "aix",
+    target_os = "emscripten",
+    target_os = "fuchsia",
+    target_os = "haiku",
+    target_os = "nto",
+))]
+#[inline]
+pub(crate) fn msg_control_len(len: usize) -> c::socklen_t {
+    len.try_into().unwrap_or(c::socklen_t::MAX)
+}
+
+/// Convert the value to a `size_t`.
+#[cfg(not(any(
+    bsd,
+    solarish,
+    windows,
+    target_env = "musl",
+    target_os = "aix",
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+#[inline]
+pub(crate) fn msg_control_len(len: usize) -> c::size_t {
+    len
+}
diff --git a/vendor/rustix/src/backend/libc/event/epoll.rs b/vendor/rustix/src/backend/libc/event/epoll.rs
new file mode 100644
index 0000000..ced3be1
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/event/epoll.rs
@@ -0,0 +1,496 @@
+//! Linux `epoll` support.
+//!
+//! # Examples
+//!
+//! ```no_run
+//! # #[cfg(feature = "net")]
+//! # fn main() -> std::io::Result<()> {
+//! use rustix::event::epoll;
+//! use rustix::fd::AsFd;
+//! use rustix::io::{ioctl_fionbio, read, write};
+//! use rustix::net::{
+//!     accept, bind_v4, listen, socket, AddressFamily, Ipv4Addr, SocketAddrV4, SocketType,
+//! };
+//! use std::collections::HashMap;
+//! use std::os::unix::io::AsRawFd;
+//!
+//! // Create a socket and listen on it.
+//! let listen_sock = socket(AddressFamily::INET, SocketType::STREAM, None)?;
+//! bind_v4(&listen_sock, &SocketAddrV4::new(Ipv4Addr::LOCALHOST, 0))?;
+//! listen(&listen_sock, 1)?;
+//!
+//! // Create an epoll object. Using `Owning` here means the epoll object will
+//! // take ownership of the file descriptors registered with it.
+//! let epoll = epoll::create(epoll::CreateFlags::CLOEXEC)?;
+//!
+//! // Register the socket with the epoll object.
+//! epoll::add(
+//!     &epoll,
+//!     &listen_sock,
+//!     epoll::EventData::new_u64(1),
+//!     epoll::EventFlags::IN,
+//! )?;
+//!
+//! // Keep track of the sockets we've opened.
+//! let mut next_id = epoll::EventData::new_u64(2);
+//! let mut sockets = HashMap::new();
+//!
+//! // Process events.
+//! let mut event_list = epoll::EventVec::with_capacity(4);
+//! loop {
+//!     epoll::wait(&epoll, &mut event_list, -1)?;
+//!     for event in &event_list {
+//!         let target = event.data;
+//!         if target.u64() == 1 {
+//!             // Accept a new connection, set it to non-blocking, and
+//!             // register to be notified when it's ready to write to.
+//!             let conn_sock = accept(&listen_sock)?;
+//!             ioctl_fionbio(&conn_sock, true)?;
+//!             epoll::add(
+//!                 &epoll,
+//!                 &conn_sock,
+//!                 next_id,
+//!                 epoll::EventFlags::OUT | epoll::EventFlags::ET,
+//!             )?;
+//!
+//!             // Keep track of the socket.
+//!             sockets.insert(next_id, conn_sock);
+//!             next_id = epoll::EventData::new_u64(next_id.u64() + 1);
+//!         } else {
+//!             // Write a message to the stream and then unregister it.
+//!             let target = sockets.remove(&target).unwrap();
+//!             write(&target, b"hello\n")?;
+//!             let _ = epoll::delete(&epoll, &target)?;
+//!         }
+//!     }
+//! }
+//! # }
+//! # #[cfg(not(feature = "net"))]
+//! # fn main() {}
+//! ```
+
+use crate::backend::c;
+#[cfg(feature = "alloc")]
+use crate::backend::conv::ret_u32;
+use crate::backend::conv::{ret, ret_owned_fd};
+use crate::fd::{AsFd, AsRawFd, OwnedFd};
+use crate::io;
+use crate::utils::as_mut_ptr;
+#[cfg(feature = "alloc")]
+use alloc::vec::Vec;
+use bitflags::bitflags;
+use core::ffi::c_void;
+use core::hash::{Hash, Hasher};
+use core::ptr::null_mut;
+use core::slice;
+
+bitflags! {
+    /// `EPOLL_*` for use with [`new`].
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct CreateFlags: u32 {
+        /// `EPOLL_CLOEXEC`
+        const CLOEXEC = bitcast!(c::EPOLL_CLOEXEC);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `EPOLL*` for use with [`add`].
+    #[repr(transparent)]
+    #[derive(Default, Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct EventFlags: u32 {
+        /// `EPOLLIN`
+        const IN = bitcast!(c::EPOLLIN);
+
+        /// `EPOLLOUT`
+        const OUT = bitcast!(c::EPOLLOUT);
+
+        /// `EPOLLPRI`
+        const PRI = bitcast!(c::EPOLLPRI);
+
+        /// `EPOLLERR`
+        const ERR = bitcast!(c::EPOLLERR);
+
+        /// `EPOLLHUP`
+        const HUP = bitcast!(c::EPOLLHUP);
+
+        /// `EPOLLRDNORM`
+        const RDNORM = bitcast!(c::EPOLLRDNORM);
+
+        /// `EPOLLRDBAND`
+        const RDBAND = bitcast!(c::EPOLLRDBAND);
+
+        /// `EPOLLWRNORM`
+        const WRNORM = bitcast!(c::EPOLLWRNORM);
+
+        /// `EPOLLWRBAND`
+        const WRBAND = bitcast!(c::EPOLLWRBAND);
+
+        /// `EPOLLMSG`
+        const MSG = bitcast!(c::EPOLLMSG);
+
+        /// `EPOLLRDHUP`
+        const RDHUP = bitcast!(c::EPOLLRDHUP);
+
+        /// `EPOLLET`
+        const ET = bitcast!(c::EPOLLET);
+
+        /// `EPOLLONESHOT`
+        const ONESHOT = bitcast!(c::EPOLLONESHOT);
+
+        /// `EPOLLWAKEUP`
+        const WAKEUP = bitcast!(c::EPOLLWAKEUP);
+
+        /// `EPOLLEXCLUSIVE`
+        #[cfg(not(target_os = "android"))]
+        const EXCLUSIVE = bitcast!(c::EPOLLEXCLUSIVE);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `epoll_create1(flags)`—Creates a new epoll object.
+///
+/// Use the [`CreateFlags::CLOEXEC`] flag to prevent the resulting file
+/// descriptor from being implicitly passed across `exec` boundaries.
+#[inline]
+#[doc(alias = "epoll_create1")]
+pub fn create(flags: CreateFlags) -> io::Result<OwnedFd> {
+    // SAFETY: We're calling `epoll_create1` via FFI and we know how it
+    // behaves.
+    unsafe { ret_owned_fd(c::epoll_create1(bitflags_bits!(flags))) }
+}
+
+/// `epoll_ctl(self, EPOLL_CTL_ADD, data, event)`—Adds an element to an epoll
+/// object.
+///
+/// This registers interest in any of the events set in `events` occurring on
+/// the file descriptor associated with `data`.
+///
+/// If [`delete`] is not called on the I/O source passed into this function
+/// before the I/O source is `close`d, then the `epoll` will act as if the I/O
+/// source is still registered with it. This can lead to spurious events being
+/// returned from [`wait`]. If a file descriptor is an
+/// `Arc<dyn SystemResource>`, then `epoll` can be thought to maintain a
+/// `Weak<dyn SystemResource>` to the file descriptor.
+#[doc(alias = "epoll_ctl")]
+pub fn add(
+    epoll: impl AsFd,
+    source: impl AsFd,
+    data: EventData,
+    event_flags: EventFlags,
+) -> io::Result<()> {
+    // SAFETY: We're calling `epoll_ctl` via FFI and we know how it
+    // behaves. We use our own `Event` struct instead of libc's because
+    // ours preserves pointer provenance instead of just using a `u64`,
+    // and we have tests elsehwere for layout equivalence.
+    unsafe {
+        let raw_fd = source.as_fd().as_raw_fd();
+        ret(c::epoll_ctl(
+            epoll.as_fd().as_raw_fd(),
+            c::EPOLL_CTL_ADD,
+            raw_fd,
+            as_mut_ptr(&mut Event {
+                flags: event_flags,
+                data,
+            })
+            .cast(),
+        ))
+    }
+}
+
+/// `epoll_ctl(self, EPOLL_CTL_MOD, target, event)`—Modifies an element in a
+/// given epoll object.
+///
+/// This sets the events of interest with `target` to `events`.
+#[doc(alias = "epoll_ctl")]
+pub fn modify(
+    epoll: impl AsFd,
+    source: impl AsFd,
+    data: EventData,
+    event_flags: EventFlags,
+) -> io::Result<()> {
+    let raw_fd = source.as_fd().as_raw_fd();
+
+    // SAFETY: We're calling `epoll_ctl` via FFI and we know how it
+    // behaves. We use our own `Event` struct instead of libc's because
+    // ours preserves pointer provenance instead of just using a `u64`,
+    // and we have tests elsehwere for layout equivalence.
+    unsafe {
+        ret(c::epoll_ctl(
+            epoll.as_fd().as_raw_fd(),
+            c::EPOLL_CTL_MOD,
+            raw_fd,
+            as_mut_ptr(&mut Event {
+                flags: event_flags,
+                data,
+            })
+            .cast(),
+        ))
+    }
+}
+
+/// `epoll_ctl(self, EPOLL_CTL_DEL, target, NULL)`—Removes an element in a
+/// given epoll object.
+#[doc(alias = "epoll_ctl")]
+pub fn delete(epoll: impl AsFd, source: impl AsFd) -> io::Result<()> {
+    // SAFETY: We're calling `epoll_ctl` via FFI and we know how it
+    // behaves.
+    unsafe {
+        let raw_fd = source.as_fd().as_raw_fd();
+        ret(c::epoll_ctl(
+            epoll.as_fd().as_raw_fd(),
+            c::EPOLL_CTL_DEL,
+            raw_fd,
+            null_mut(),
+        ))
+    }
+}
+
+/// `epoll_wait(self, events, timeout)`—Waits for registered events of
+/// interest.
+///
+/// For each event of interest, an element is written to `events`. On
+/// success, this returns the number of written elements.
+#[cfg(feature = "alloc")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
+pub fn wait(epoll: impl AsFd, event_list: &mut EventVec, timeout: c::c_int) -> io::Result<()> {
+    // SAFETY: We're calling `epoll_wait` via FFI and we know how it
+    // behaves.
+    unsafe {
+        event_list.events.set_len(0);
+        let nfds = ret_u32(c::epoll_wait(
+            epoll.as_fd().as_raw_fd(),
+            event_list.events.as_mut_ptr().cast::<c::epoll_event>(),
+            event_list.events.capacity().try_into().unwrap_or(i32::MAX),
+            timeout,
+        ))?;
+        event_list.events.set_len(nfds as usize);
+    }
+
+    Ok(())
+}
+
+/// An iterator over the `Event`s in an `EventVec`.
+pub struct Iter<'a> {
+    /// Use `Copied` to copy the struct, since `Event` is `packed` on some
+    /// platforms, and it's common for users to directly destructure it, which
+    /// would lead to errors about forming references to packed fields.
+    iter: core::iter::Copied<slice::Iter<'a, Event>>,
+}
+
+impl<'a> Iterator for Iter<'a> {
+    type Item = Event;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next()
+    }
+}
+
+/// A record of an event that occurred.
+#[repr(C)]
+#[cfg_attr(
+    any(
+        all(
+            target_arch = "x86",
+            not(target_env = "musl"),
+            not(target_os = "android"),
+        ),
+        target_arch = "x86_64",
+    ),
+    repr(packed)
+)]
+#[derive(Copy, Clone, Eq, PartialEq, Hash)]
+pub struct Event {
+    /// Which specific event(s) occurred.
+    pub flags: EventFlags,
+    /// User data.
+    pub data: EventData,
+}
+
+/// Data associated with an [`Event`]. This can either be a 64-bit integer
+/// value or a pointer which preserves pointer provenance.
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub union EventData {
+    /// A 64-bit integer value.
+    as_u64: u64,
+
+    /// A `*mut c_void` which preserves pointer provenance, extended to be
+    /// 64-bit so that if we read the value as a `u64` union field, we don't
+    /// get uninitialized memory.
+    sixty_four_bit_pointer: SixtyFourBitPointer,
+}
+
+impl EventData {
+    /// Construct a new value containing a `u64`.
+    #[inline]
+    pub const fn new_u64(value: u64) -> Self {
+        Self { as_u64: value }
+    }
+
+    /// Construct a new value containing a `*mut c_void`.
+    #[inline]
+    pub const fn new_ptr(value: *mut c_void) -> Self {
+        Self {
+            sixty_four_bit_pointer: SixtyFourBitPointer {
+                pointer: value,
+                #[cfg(target_pointer_width = "32")]
+                _padding: 0,
+            },
+        }
+    }
+
+    /// Return the value as a `u64`.
+    ///
+    /// If the stored value was a pointer, the pointer is zero-extended to a
+    /// `u64`.
+    #[inline]
+    pub fn u64(self) -> u64 {
+        unsafe { self.as_u64 }
+    }
+
+    /// Return the value as a `*mut c_void`.
+    ///
+    /// If the stored value was a `u64`, the least-significant bits of the
+    /// `u64` are returned as a pointer value.
+    #[inline]
+    pub fn ptr(self) -> *mut c_void {
+        unsafe { self.sixty_four_bit_pointer.pointer }
+    }
+}
+
+impl PartialEq for EventData {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.u64() == other.u64()
+    }
+}
+
+impl Eq for EventData {}
+
+impl Hash for EventData {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.u64().hash(state)
+    }
+}
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+struct SixtyFourBitPointer {
+    #[cfg(target_endian = "big")]
+    #[cfg(target_pointer_width = "32")]
+    _padding: u32,
+
+    pointer: *mut c_void,
+
+    #[cfg(target_endian = "little")]
+    #[cfg(target_pointer_width = "32")]
+    _padding: u32,
+}
+
+/// A vector of `Event`s, plus context for interpreting them.
+#[cfg(feature = "alloc")]
+pub struct EventVec {
+    events: Vec<Event>,
+}
+
+#[cfg(feature = "alloc")]
+impl EventVec {
+    /// Constructs an `EventVec` from raw pointer, length, and capacity.
+    ///
+    /// # Safety
+    ///
+    /// This function calls [`Vec::from_raw_parts`] with its arguments.
+    ///
+    /// [`Vec::from_raw_parts`]: https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.from_raw_parts
+    #[inline]
+    pub unsafe fn from_raw_parts(ptr: *mut Event, len: usize, capacity: usize) -> Self {
+        Self {
+            events: Vec::from_raw_parts(ptr, len, capacity),
+        }
+    }
+
+    /// Constructs an `EventVec` with memory for `capacity` `Event`s.
+    #[inline]
+    pub fn with_capacity(capacity: usize) -> Self {
+        Self {
+            events: Vec::with_capacity(capacity),
+        }
+    }
+
+    /// Returns the current `Event` capacity of this `EventVec`.
+    #[inline]
+    pub fn capacity(&self) -> usize {
+        self.events.capacity()
+    }
+
+    /// Reserves enough memory for at least `additional` more `Event`s.
+    #[inline]
+    pub fn reserve(&mut self, additional: usize) {
+        self.events.reserve(additional);
+    }
+
+    /// Reserves enough memory for exactly `additional` more `Event`s.
+    #[inline]
+    pub fn reserve_exact(&mut self, additional: usize) {
+        self.events.reserve_exact(additional);
+    }
+
+    /// Clears all the `Events` out of this `EventVec`.
+    #[inline]
+    pub fn clear(&mut self) {
+        self.events.clear();
+    }
+
+    /// Shrinks the capacity of this `EventVec` as much as possible.
+    #[inline]
+    pub fn shrink_to_fit(&mut self) {
+        self.events.shrink_to_fit();
+    }
+
+    /// Returns an iterator over the `Event`s in this `EventVec`.
+    #[inline]
+    pub fn iter(&self) -> Iter<'_> {
+        Iter {
+            iter: self.events.iter().copied(),
+        }
+    }
+
+    /// Returns the number of `Event`s logically contained in this `EventVec`.
+    #[inline]
+    pub fn len(&mut self) -> usize {
+        self.events.len()
+    }
+
+    /// Tests whether this `EventVec` is logically empty.
+    #[inline]
+    pub fn is_empty(&mut self) -> bool {
+        self.events.is_empty()
+    }
+}
+
+#[cfg(feature = "alloc")]
+impl<'a> IntoIterator for &'a EventVec {
+    type IntoIter = Iter<'a>;
+    type Item = Event;
+
+    #[inline]
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
+#[test]
+fn test_epoll_layouts() {
+    check_renamed_type!(Event, epoll_event);
+    check_renamed_type!(Event, epoll_event);
+    check_renamed_struct_renamed_field!(Event, epoll_event, flags, events);
+    check_renamed_struct_renamed_field!(Event, epoll_event, data, u64);
+}
diff --git a/vendor/rustix/src/backend/libc/event/mod.rs b/vendor/rustix/src/backend/libc/event/mod.rs
new file mode 100644
index 0000000..6aed461
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/event/mod.rs
@@ -0,0 +1,9 @@
+pub(crate) mod poll_fd;
+#[cfg(not(windows))]
+pub(crate) mod types;
+
+#[cfg_attr(windows, path = "windows_syscalls.rs")]
+pub(crate) mod syscalls;
+
+#[cfg(linux_kernel)]
+pub mod epoll;
diff --git a/vendor/rustix/src/backend/libc/event/poll_fd.rs b/vendor/rustix/src/backend/libc/event/poll_fd.rs
new file mode 100644
index 0000000..32fd83d
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/event/poll_fd.rs
@@ -0,0 +1,142 @@
+use crate::backend::c;
+use crate::backend::conv::borrowed_fd;
+use crate::backend::fd::{AsFd, AsRawFd, BorrowedFd, LibcFd};
+use bitflags::bitflags;
+use core::marker::PhantomData;
+#[cfg(windows)]
+use {
+    crate::backend::fd::{AsSocket, RawFd},
+    core::fmt,
+};
+
+bitflags! {
+    /// `POLL*` flags for use with [`poll`].
+    ///
+    /// [`poll`]: crate::event::poll
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct PollFlags: c::c_short {
+        /// `POLLIN`
+        const IN = c::POLLIN;
+        /// `POLLPRI`
+        #[cfg(not(target_os = "wasi"))]
+        const PRI = c::POLLPRI;
+        /// `POLLOUT`
+        const OUT = c::POLLOUT;
+        /// `POLLRDNORM`
+        const RDNORM = c::POLLRDNORM;
+        /// `POLLWRNORM`
+        #[cfg(not(target_os = "l4re"))]
+        const WRNORM = c::POLLWRNORM;
+        /// `POLLRDBAND`
+        #[cfg(not(any(target_os = "l4re", target_os = "wasi")))]
+        const RDBAND = c::POLLRDBAND;
+        /// `POLLWRBAND`
+        #[cfg(not(any(target_os = "l4re", target_os = "wasi")))]
+        const WRBAND = c::POLLWRBAND;
+        /// `POLLERR`
+        const ERR = c::POLLERR;
+        /// `POLLHUP`
+        const HUP = c::POLLHUP;
+        /// `POLLNVAL`
+        #[cfg(not(target_os = "espidf"))]
+        const NVAL = c::POLLNVAL;
+        /// `POLLRDHUP`
+        #[cfg(all(
+            linux_kernel,
+            not(any(target_arch = "sparc", target_arch = "sparc64"))),
+        )]
+        const RDHUP = c::POLLRDHUP;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `struct pollfd`—File descriptor and flags for use with [`poll`].
+///
+/// [`poll`]: crate::event::poll
+#[doc(alias = "pollfd")]
+#[derive(Clone)]
+#[cfg_attr(not(windows), derive(Debug))]
+#[repr(transparent)]
+pub struct PollFd<'fd> {
+    pollfd: c::pollfd,
+    _phantom: PhantomData<BorrowedFd<'fd>>,
+}
+
+#[cfg(windows)]
+impl<'fd> fmt::Debug for PollFd<'fd> {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt.debug_struct("pollfd")
+            .field("fd", &self.pollfd.fd)
+            .field("events", &self.pollfd.events)
+            .field("revents", &self.pollfd.revents)
+            .finish()
+    }
+}
+
+impl<'fd> PollFd<'fd> {
+    /// Constructs a new `PollFd` holding `fd` and `events`.
+    #[inline]
+    pub fn new<Fd: AsFd>(fd: &'fd Fd, events: PollFlags) -> Self {
+        Self::from_borrowed_fd(fd.as_fd(), events)
+    }
+
+    /// Sets the contained file descriptor to `fd`.
+    #[inline]
+    pub fn set_fd<Fd: AsFd>(&mut self, fd: &'fd Fd) {
+        self.pollfd.fd = fd.as_fd().as_raw_fd() as LibcFd;
+    }
+
+    /// Clears the ready events.
+    #[inline]
+    pub fn clear_revents(&mut self) {
+        self.pollfd.revents = 0;
+    }
+
+    /// Constructs a new `PollFd` holding `fd` and `events`.
+    ///
+    /// This is the same as `new`, but can be used to avoid borrowing the
+    /// `BorrowedFd`, which can be tricky in situations where the `BorrowedFd`
+    /// is a temporary.
+    #[inline]
+    pub fn from_borrowed_fd(fd: BorrowedFd<'fd>, events: PollFlags) -> Self {
+        Self {
+            pollfd: c::pollfd {
+                fd: borrowed_fd(fd),
+                events: events.bits(),
+                revents: 0,
+            },
+            _phantom: PhantomData,
+        }
+    }
+
+    /// Returns the ready events.
+    #[inline]
+    pub fn revents(&self) -> PollFlags {
+        // Use `.unwrap()` here because in theory we know we know all the bits
+        // the OS might set here, but OS's have added extensions in the past.
+        PollFlags::from_bits(self.pollfd.revents).unwrap()
+    }
+}
+
+#[cfg(not(windows))]
+impl<'fd> AsFd for PollFd<'fd> {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        // SAFETY: Our constructors and `set_fd` require `pollfd.fd` to be
+        // valid for the `'fd` lifetime.
+        unsafe { BorrowedFd::borrow_raw(self.pollfd.fd) }
+    }
+}
+
+#[cfg(windows)]
+impl<'fd> AsSocket for PollFd<'fd> {
+    #[inline]
+    fn as_socket(&self) -> BorrowedFd<'_> {
+        // SAFETY: Our constructors and `set_fd` require `pollfd.fd` to be
+        // valid for the `'fd` lifetime.
+        unsafe { BorrowedFd::borrow_raw(self.pollfd.fd as RawFd) }
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/event/syscalls.rs b/vendor/rustix/src/backend/libc/event/syscalls.rs
new file mode 100644
index 0000000..725ec82
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/event/syscalls.rs
@@ -0,0 +1,191 @@
+//! libc syscalls supporting `rustix::event`.
+
+use crate::backend::c;
+use crate::backend::conv::ret_c_int;
+#[cfg(any(apple, netbsdlike, target_os = "dragonfly", target_os = "solaris"))]
+use crate::backend::conv::ret_owned_fd;
+use crate::event::PollFd;
+#[cfg(any(linux_kernel, bsd, solarish, target_os = "espidf"))]
+use crate::fd::OwnedFd;
+use crate::io;
+#[cfg(any(bsd, solarish))]
+use {crate::backend::conv::borrowed_fd, crate::fd::BorrowedFd, core::mem::MaybeUninit};
+#[cfg(solarish)]
+use {
+    crate::backend::conv::ret, crate::event::port::Event, crate::utils::as_mut_ptr,
+    core::ptr::null_mut,
+};
+#[cfg(any(
+    linux_kernel,
+    target_os = "freebsd",
+    target_os = "illumos",
+    target_os = "espidf"
+))]
+use {crate::backend::conv::ret_owned_fd, crate::event::EventfdFlags};
+#[cfg(all(feature = "alloc", bsd))]
+use {crate::event::kqueue::Event, crate::utils::as_ptr, core::ptr::null};
+
+#[cfg(any(
+    linux_kernel,
+    target_os = "freebsd",
+    target_os = "illumos",
+    target_os = "espidf"
+))]
+pub(crate) fn eventfd(initval: u32, flags: EventfdFlags) -> io::Result<OwnedFd> {
+    #[cfg(linux_kernel)]
+    unsafe {
+        syscall! {
+            fn eventfd2(
+                initval: c::c_uint,
+                flags: c::c_int
+            ) via SYS_eventfd2 -> c::c_int
+        }
+        ret_owned_fd(eventfd2(initval, bitflags_bits!(flags)))
+    }
+
+    // `eventfd` was added in FreeBSD 13, so it isn't available on FreeBSD 12.
+    #[cfg(target_os = "freebsd")]
+    unsafe {
+        weakcall! {
+            fn eventfd(
+                initval: c::c_uint,
+                flags: c::c_int
+            ) -> c::c_int
+        }
+        ret_owned_fd(eventfd(initval, bitflags_bits!(flags)))
+    }
+
+    #[cfg(any(target_os = "illumos", target_os = "espidf"))]
+    unsafe {
+        ret_owned_fd(c::eventfd(initval, bitflags_bits!(flags)))
+    }
+}
+
+#[cfg(all(feature = "alloc", bsd))]
+pub(crate) fn kqueue() -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(c::kqueue()) }
+}
+
+#[cfg(all(feature = "alloc", bsd))]
+pub(crate) unsafe fn kevent(
+    kq: BorrowedFd<'_>,
+    changelist: &[Event],
+    eventlist: &mut [MaybeUninit<Event>],
+    timeout: Option<&c::timespec>,
+) -> io::Result<c::c_int> {
+    ret_c_int(c::kevent(
+        borrowed_fd(kq),
+        changelist.as_ptr().cast(),
+        changelist
+            .len()
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        eventlist.as_mut_ptr().cast(),
+        eventlist
+            .len()
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        timeout.map_or(null(), as_ptr),
+    ))
+}
+
+#[inline]
+pub(crate) fn poll(fds: &mut [PollFd<'_>], timeout: c::c_int) -> io::Result<usize> {
+    let nfds = fds
+        .len()
+        .try_into()
+        .map_err(|_convert_err| io::Errno::INVAL)?;
+
+    ret_c_int(unsafe { c::poll(fds.as_mut_ptr().cast(), nfds, timeout) })
+        .map(|nready| nready as usize)
+}
+
+#[cfg(solarish)]
+pub(crate) fn port_create() -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(c::port_create()) }
+}
+
+#[cfg(solarish)]
+pub(crate) unsafe fn port_associate(
+    port: BorrowedFd<'_>,
+    source: c::c_int,
+    object: c::uintptr_t,
+    events: c::c_int,
+    user: *mut c::c_void,
+) -> io::Result<()> {
+    ret(c::port_associate(
+        borrowed_fd(port),
+        source,
+        object,
+        events,
+        user,
+    ))
+}
+
+#[cfg(solarish)]
+pub(crate) unsafe fn port_dissociate(
+    port: BorrowedFd<'_>,
+    source: c::c_int,
+    object: c::uintptr_t,
+) -> io::Result<()> {
+    ret(c::port_dissociate(borrowed_fd(port), source, object))
+}
+
+#[cfg(solarish)]
+pub(crate) fn port_get(
+    port: BorrowedFd<'_>,
+    timeout: Option<&mut c::timespec>,
+) -> io::Result<Event> {
+    let mut event = MaybeUninit::<c::port_event>::uninit();
+    let timeout = timeout.map_or(null_mut(), as_mut_ptr);
+
+    unsafe {
+        ret(c::port_get(borrowed_fd(port), event.as_mut_ptr(), timeout))?;
+    }
+
+    // If we're done, initialize the event and return it.
+    Ok(Event(unsafe { event.assume_init() }))
+}
+
+#[cfg(all(feature = "alloc", solarish))]
+pub(crate) fn port_getn(
+    port: BorrowedFd<'_>,
+    timeout: Option<&mut c::timespec>,
+    events: &mut Vec<Event>,
+    mut nget: u32,
+) -> io::Result<()> {
+    let timeout = timeout.map_or(null_mut(), as_mut_ptr);
+    unsafe {
+        ret(c::port_getn(
+            borrowed_fd(port),
+            events.as_mut_ptr().cast(),
+            events.len().try_into().unwrap(),
+            &mut nget,
+            timeout,
+        ))?;
+    }
+
+    // Update the vector length.
+    unsafe {
+        events.set_len(nget.try_into().unwrap());
+    }
+
+    Ok(())
+}
+
+#[cfg(solarish)]
+pub(crate) fn port_send(
+    port: BorrowedFd<'_>,
+    events: c::c_int,
+    userdata: *mut c::c_void,
+) -> io::Result<()> {
+    unsafe { ret(c::port_send(borrowed_fd(port), events, userdata)) }
+}
+
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+pub(crate) fn pause() {
+    let r = unsafe { libc::pause() };
+    let errno = libc_errno::errno().0;
+    debug_assert_eq!(r, -1);
+    debug_assert_eq!(errno, libc::EINTR);
+}
diff --git a/vendor/rustix/src/backend/libc/event/types.rs b/vendor/rustix/src/backend/libc/event/types.rs
new file mode 100644
index 0000000..a04d7e6
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/event/types.rs
@@ -0,0 +1,37 @@
+#[cfg(any(linux_kernel, target_os = "freebsd", target_os = "illumos"))]
+use crate::backend::c;
+#[cfg(any(
+    linux_kernel,
+    target_os = "freebsd",
+    target_os = "illumos",
+    target_os = "espidf"
+))]
+use bitflags::bitflags;
+
+#[cfg(any(
+    linux_kernel,
+    target_os = "freebsd",
+    target_os = "illumos",
+    target_os = "espidf"
+))]
+bitflags! {
+    /// `EFD_*` flags for use with [`eventfd`].
+    ///
+    /// [`eventfd`]: crate::event::eventfd
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct EventfdFlags: u32 {
+        /// `EFD_CLOEXEC`
+        #[cfg(not(target_os = "espidf"))]
+        const CLOEXEC = bitcast!(c::EFD_CLOEXEC);
+        /// `EFD_NONBLOCK`
+        #[cfg(not(target_os = "espidf"))]
+        const NONBLOCK = bitcast!(c::EFD_NONBLOCK);
+        /// `EFD_SEMAPHORE`
+        #[cfg(not(target_os = "espidf"))]
+        const SEMAPHORE = bitcast!(c::EFD_SEMAPHORE);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/event/windows_syscalls.rs b/vendor/rustix/src/backend/libc/event/windows_syscalls.rs
new file mode 100644
index 0000000..8ccad47
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/event/windows_syscalls.rs
@@ -0,0 +1,16 @@
+//! Windows system calls in the `event` module.
+
+use crate::backend::c;
+use crate::backend::conv::ret_c_int;
+use crate::event::PollFd;
+use crate::io;
+
+pub(crate) fn poll(fds: &mut [PollFd<'_>], timeout: c::c_int) -> io::Result<usize> {
+    let nfds = fds
+        .len()
+        .try_into()
+        .map_err(|_convert_err| io::Errno::INVAL)?;
+
+    ret_c_int(unsafe { c::poll(fds.as_mut_ptr().cast(), nfds, timeout) })
+        .map(|nready| nready as usize)
+}
diff --git a/vendor/rustix/src/backend/libc/fs/dir.rs b/vendor/rustix/src/backend/libc/fs/dir.rs
new file mode 100644
index 0000000..82a0a90
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/fs/dir.rs
@@ -0,0 +1,423 @@
+#[cfg(not(any(solarish, target_os = "haiku", target_os = "nto", target_os = "vita")))]
+use super::types::FileType;
+use crate::backend::c;
+use crate::backend::conv::owned_fd;
+use crate::fd::{AsFd, BorrowedFd, OwnedFd};
+use crate::ffi::{CStr, CString};
+use crate::fs::{fcntl_getfl, openat, Mode, OFlags};
+#[cfg(not(target_os = "vita"))]
+use crate::fs::{fstat, Stat};
+#[cfg(not(any(
+    solarish,
+    target_os = "haiku",
+    target_os = "netbsd",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+use crate::fs::{fstatfs, StatFs};
+#[cfg(not(any(
+    solarish,
+    target_os = "haiku",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use crate::fs::{fstatvfs, StatVfs};
+use crate::io;
+#[cfg(not(any(target_os = "fuchsia", target_os = "vita", target_os = "wasi")))]
+#[cfg(feature = "process")]
+use crate::process::fchdir;
+use alloc::borrow::ToOwned;
+#[cfg(not(any(linux_like, target_os = "hurd")))]
+use c::readdir as libc_readdir;
+#[cfg(any(linux_like, target_os = "hurd"))]
+use c::readdir64 as libc_readdir;
+use core::fmt;
+use core::ptr::NonNull;
+use libc_errno::{errno, set_errno, Errno};
+
+/// `DIR*`
+pub struct Dir {
+    /// The `libc` `DIR` pointer.
+    libc_dir: NonNull<c::DIR>,
+
+    /// Have we seen any errors in this iteration?
+    any_errors: bool,
+}
+
+impl Dir {
+    /// Take ownership of `fd` and construct a `Dir` that reads entries from
+    /// the given directory file descriptor.
+    #[inline]
+    pub fn new<Fd: Into<OwnedFd>>(fd: Fd) -> io::Result<Self> {
+        Self::_new(fd.into())
+    }
+
+    #[inline]
+    fn _new(fd: OwnedFd) -> io::Result<Self> {
+        let raw = owned_fd(fd);
+        unsafe {
+            let libc_dir = c::fdopendir(raw);
+
+            if let Some(libc_dir) = NonNull::new(libc_dir) {
+                Ok(Self {
+                    libc_dir,
+                    any_errors: false,
+                })
+            } else {
+                let err = io::Errno::last_os_error();
+                let _ = c::close(raw);
+                Err(err)
+            }
+        }
+    }
+
+    /// Borrow `fd` and construct a `Dir` that reads entries from the given
+    /// directory file descriptor.
+    #[inline]
+    pub fn read_from<Fd: AsFd>(fd: Fd) -> io::Result<Self> {
+        Self::_read_from(fd.as_fd())
+    }
+
+    #[inline]
+    #[allow(unused_mut)]
+    fn _read_from(fd: BorrowedFd<'_>) -> io::Result<Self> {
+        let mut any_errors = false;
+
+        // Given an arbitrary `OwnedFd`, it's impossible to know whether the
+        // user holds a `dup`'d copy which could continue to modify the
+        // file description state, which would cause Undefined Behavior after
+        // our call to `fdopendir`. To prevent this, we obtain an independent
+        // `OwnedFd`.
+        let flags = fcntl_getfl(fd)?;
+        let fd_for_dir = match openat(fd, cstr!("."), flags | OFlags::CLOEXEC, Mode::empty()) {
+            Ok(fd) => fd,
+            #[cfg(not(target_os = "wasi"))]
+            Err(io::Errno::NOENT) => {
+                // If "." doesn't exist, it means the directory was removed.
+                // We treat that as iterating through a directory with no
+                // entries.
+                any_errors = true;
+                crate::io::dup(fd)?
+            }
+            Err(err) => return Err(err),
+        };
+
+        let raw = owned_fd(fd_for_dir);
+        unsafe {
+            let libc_dir = c::fdopendir(raw);
+
+            if let Some(libc_dir) = NonNull::new(libc_dir) {
+                Ok(Self {
+                    libc_dir,
+                    any_errors,
+                })
+            } else {
+                let err = io::Errno::last_os_error();
+                let _ = c::close(raw);
+                Err(err)
+            }
+        }
+    }
+
+    /// `rewinddir(self)`
+    #[inline]
+    pub fn rewind(&mut self) {
+        self.any_errors = false;
+        unsafe { c::rewinddir(self.libc_dir.as_ptr()) }
+    }
+
+    /// `readdir(self)`, where `None` means the end of the directory.
+    pub fn read(&mut self) -> Option<io::Result<DirEntry>> {
+        // If we've seen errors, don't continue to try to read anyting further.
+        if self.any_errors {
+            return None;
+        }
+
+        set_errno(Errno(0));
+        let dirent_ptr = unsafe { libc_readdir(self.libc_dir.as_ptr()) };
+        if dirent_ptr.is_null() {
+            let curr_errno = errno().0;
+            if curr_errno == 0 {
+                // We successfully reached the end of the stream.
+                None
+            } else {
+                // `errno` is unknown or non-zero, so an error occurred.
+                self.any_errors = true;
+                Some(Err(io::Errno(curr_errno)))
+            }
+        } else {
+            // We successfully read an entry.
+            unsafe {
+                let dirent = &*dirent_ptr;
+
+                // We have our own copy of OpenBSD's dirent; check that the
+                // layout minimally matches libc's.
+                #[cfg(target_os = "openbsd")]
+                check_dirent_layout(dirent);
+
+                let result = DirEntry {
+                    #[cfg(not(any(
+                        solarish,
+                        target_os = "aix",
+                        target_os = "haiku",
+                        target_os = "nto",
+                        target_os = "vita"
+                    )))]
+                    d_type: dirent.d_type,
+
+                    #[cfg(not(any(freebsdlike, netbsdlike, target_os = "vita")))]
+                    d_ino: dirent.d_ino,
+
+                    #[cfg(any(freebsdlike, netbsdlike))]
+                    d_fileno: dirent.d_fileno,
+
+                    name: CStr::from_ptr(dirent.d_name.as_ptr()).to_owned(),
+                };
+
+                Some(Ok(result))
+            }
+        }
+    }
+
+    /// `fstat(self)`
+    #[cfg(not(target_os = "vita"))]
+    #[inline]
+    pub fn stat(&self) -> io::Result<Stat> {
+        fstat(unsafe { BorrowedFd::borrow_raw(c::dirfd(self.libc_dir.as_ptr())) })
+    }
+
+    /// `fstatfs(self)`
+    #[cfg(not(any(
+        solarish,
+        target_os = "haiku",
+        target_os = "netbsd",
+        target_os = "nto",
+        target_os = "redox",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    #[inline]
+    pub fn statfs(&self) -> io::Result<StatFs> {
+        fstatfs(unsafe { BorrowedFd::borrow_raw(c::dirfd(self.libc_dir.as_ptr())) })
+    }
+
+    /// `fstatvfs(self)`
+    #[cfg(not(any(
+        solarish,
+        target_os = "haiku",
+        target_os = "redox",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    #[inline]
+    pub fn statvfs(&self) -> io::Result<StatVfs> {
+        fstatvfs(unsafe { BorrowedFd::borrow_raw(c::dirfd(self.libc_dir.as_ptr())) })
+    }
+
+    /// `fchdir(self)`
+    #[cfg(feature = "process")]
+    #[cfg(not(any(target_os = "fuchsia", target_os = "vita", target_os = "wasi")))]
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "process")))]
+    #[inline]
+    pub fn chdir(&self) -> io::Result<()> {
+        fchdir(unsafe { BorrowedFd::borrow_raw(c::dirfd(self.libc_dir.as_ptr())) })
+    }
+}
+
+/// `Dir` implements `Send` but not `Sync`, because we use `readdir` which is
+/// not guaranteed to be thread-safe. Users can wrap this in a `Mutex` if they
+/// need `Sync`, which is effectively what'd need to do to implement `Sync`
+/// ourselves.
+unsafe impl Send for Dir {}
+
+impl Drop for Dir {
+    #[inline]
+    fn drop(&mut self) {
+        unsafe { c::closedir(self.libc_dir.as_ptr()) };
+    }
+}
+
+impl Iterator for Dir {
+    type Item = io::Result<DirEntry>;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        Self::read(self)
+    }
+}
+
+impl fmt::Debug for Dir {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut s = f.debug_struct("Dir");
+        #[cfg(not(target_os = "vita"))]
+        s.field("fd", unsafe { &c::dirfd(self.libc_dir.as_ptr()) });
+        s.finish()
+    }
+}
+
+/// `struct dirent`
+#[derive(Debug)]
+pub struct DirEntry {
+    #[cfg(not(any(
+        solarish,
+        target_os = "aix",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "vita"
+    )))]
+    d_type: u8,
+
+    #[cfg(not(any(freebsdlike, netbsdlike, target_os = "vita")))]
+    d_ino: c::ino_t,
+
+    #[cfg(any(freebsdlike, netbsdlike))]
+    d_fileno: c::ino_t,
+
+    name: CString,
+}
+
+impl DirEntry {
+    /// Returns the file name of this directory entry.
+    #[inline]
+    pub fn file_name(&self) -> &CStr {
+        &self.name
+    }
+
+    /// Returns the type of this directory entry.
+    #[cfg(not(any(
+        solarish,
+        target_os = "aix",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "vita"
+    )))]
+    #[inline]
+    pub fn file_type(&self) -> FileType {
+        FileType::from_dirent_d_type(self.d_type)
+    }
+
+    /// Return the inode number of this directory entry.
+    #[cfg(not(any(freebsdlike, netbsdlike, target_os = "vita")))]
+    #[inline]
+    pub fn ino(&self) -> u64 {
+        self.d_ino as u64
+    }
+
+    /// Return the inode number of this directory entry.
+    #[cfg(any(freebsdlike, netbsdlike))]
+    #[inline]
+    pub fn ino(&self) -> u64 {
+        #[allow(clippy::useless_conversion)]
+        self.d_fileno.into()
+    }
+}
+
+/// libc's OpenBSD `dirent` has a private field so we can't construct it
+/// directly, so we declare it ourselves to make all fields accessible.
+#[cfg(target_os = "openbsd")]
+#[repr(C)]
+#[derive(Debug)]
+struct libc_dirent {
+    d_fileno: c::ino_t,
+    d_off: c::off_t,
+    d_reclen: u16,
+    d_type: u8,
+    d_namlen: u8,
+    __d_padding: [u8; 4],
+    d_name: [c::c_char; 256],
+}
+
+/// We have our own copy of OpenBSD's dirent; check that the layout
+/// minimally matches libc's.
+#[cfg(target_os = "openbsd")]
+fn check_dirent_layout(dirent: &c::dirent) {
+    use crate::utils::as_ptr;
+
+    // Check that the basic layouts match.
+    #[cfg(test)]
+    {
+        assert_eq_size!(libc_dirent, c::dirent);
+        assert_eq_size!(libc_dirent, c::dirent);
+    }
+
+    // Check that the field offsets match.
+    assert_eq!(
+        {
+            let z = libc_dirent {
+                d_fileno: 0_u64,
+                d_off: 0_i64,
+                d_reclen: 0_u16,
+                d_type: 0_u8,
+                d_namlen: 0_u8,
+                __d_padding: [0_u8; 4],
+                d_name: [0 as c::c_char; 256],
+            };
+            let base = as_ptr(&z) as usize;
+            (
+                (as_ptr(&z.d_fileno) as usize) - base,
+                (as_ptr(&z.d_off) as usize) - base,
+                (as_ptr(&z.d_reclen) as usize) - base,
+                (as_ptr(&z.d_type) as usize) - base,
+                (as_ptr(&z.d_namlen) as usize) - base,
+                (as_ptr(&z.d_name) as usize) - base,
+            )
+        },
+        {
+            let z = dirent;
+            let base = as_ptr(z) as usize;
+            (
+                (as_ptr(&z.d_fileno) as usize) - base,
+                (as_ptr(&z.d_off) as usize) - base,
+                (as_ptr(&z.d_reclen) as usize) - base,
+                (as_ptr(&z.d_type) as usize) - base,
+                (as_ptr(&z.d_namlen) as usize) - base,
+                (as_ptr(&z.d_name) as usize) - base,
+            )
+        }
+    );
+}
+
+#[test]
+fn dir_iterator_handles_io_errors() {
+    // create a dir, keep the FD, then delete the dir
+    let tmp = tempfile::tempdir().unwrap();
+    let fd = crate::fs::openat(
+        crate::fs::CWD,
+        tmp.path(),
+        crate::fs::OFlags::RDONLY | crate::fs::OFlags::CLOEXEC,
+        crate::fs::Mode::empty(),
+    )
+    .unwrap();
+
+    let file_fd = crate::fs::openat(
+        &fd,
+        tmp.path().join("test.txt"),
+        crate::fs::OFlags::WRONLY | crate::fs::OFlags::CREATE,
+        crate::fs::Mode::RWXU,
+    )
+    .unwrap();
+
+    let mut dir = Dir::read_from(&fd).unwrap();
+
+    // Reach inside the `Dir` and replace its directory with a file, which
+    // will cause the subsequent `readdir` to fail.
+    unsafe {
+        let raw_fd = c::dirfd(dir.libc_dir.as_ptr());
+        let mut owned_fd: crate::fd::OwnedFd = crate::fd::FromRawFd::from_raw_fd(raw_fd);
+        crate::io::dup2(&file_fd, &mut owned_fd).unwrap();
+        core::mem::forget(owned_fd);
+    }
+
+    // FreeBSD and macOS seem to read some directory entries before we call
+    // `.next()`.
+    #[cfg(any(apple, freebsdlike))]
+    {
+        dir.rewind();
+    }
+
+    assert!(matches!(dir.next(), Some(Err(_))));
+    assert!(dir.next().is_none());
+}
diff --git a/vendor/rustix/src/backend/libc/fs/inotify.rs b/vendor/rustix/src/backend/libc/fs/inotify.rs
new file mode 100644
index 0000000..2044bd9
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/fs/inotify.rs
@@ -0,0 +1,131 @@
+//! inotify support for working with inotifies
+
+use crate::backend::c;
+use crate::backend::conv::{borrowed_fd, c_str, ret, ret_c_int, ret_owned_fd};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `IN_*` for use with [`inotify_init`].
+    ///
+    /// [`inotify_init`]: crate::fs::inotify::inotify_init
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct CreateFlags: u32 {
+        /// `IN_CLOEXEC`
+        const CLOEXEC = bitcast!(c::IN_CLOEXEC);
+        /// `IN_NONBLOCK`
+        const NONBLOCK = bitcast!(c::IN_NONBLOCK);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `IN*` for use with [`inotify_add_watch`].
+    ///
+    /// [`inotify_add_watch`]: crate::fs::inotify::inotify_add_watch
+    #[repr(transparent)]
+    #[derive(Default, Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct WatchFlags: u32 {
+        /// `IN_ACCESS`
+        const ACCESS = c::IN_ACCESS;
+        /// `IN_ATTRIB`
+        const ATTRIB = c::IN_ATTRIB;
+        /// `IN_CLOSE_NOWRITE`
+        const CLOSE_NOWRITE = c::IN_CLOSE_NOWRITE;
+        /// `IN_CLOSE_WRITE`
+        const CLOSE_WRITE = c::IN_CLOSE_WRITE;
+        /// `IN_CREATE`
+        const CREATE = c::IN_CREATE;
+        /// `IN_DELETE`
+        const DELETE = c::IN_DELETE;
+        /// `IN_DELETE_SELF`
+        const DELETE_SELF = c::IN_DELETE_SELF;
+        /// `IN_MODIFY`
+        const MODIFY = c::IN_MODIFY;
+        /// `IN_MOVE_SELF`
+        const MOVE_SELF = c::IN_MOVE_SELF;
+        /// `IN_MOVED_FROM`
+        const MOVED_FROM = c::IN_MOVED_FROM;
+        /// `IN_MOVED_TO`
+        const MOVED_TO = c::IN_MOVED_TO;
+        /// `IN_OPEN`
+        const OPEN = c::IN_OPEN;
+
+        /// `IN_CLOSE`
+        const CLOSE = c::IN_CLOSE;
+        /// `IN_MOVE`
+        const MOVE = c::IN_MOVE;
+        /// `IN_ALL_EVENTS`
+        const ALL_EVENTS = c::IN_ALL_EVENTS;
+
+        /// `IN_DONT_FOLLOW`
+        const DONT_FOLLOW = c::IN_DONT_FOLLOW;
+        /// `IN_EXCL_UNLINK`
+        const EXCL_UNLINK = 1;
+        /// `IN_MASK_ADD`
+        const MASK_ADD = 1;
+        /// `IN_MASK_CREATE`
+        const MASK_CREATE = 1;
+        /// `IN_ONESHOT`
+        const ONESHOT = c::IN_ONESHOT;
+        /// `IN_ONLYDIR`
+        const ONLYDIR = c::IN_ONLYDIR;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `inotify_init1(flags)`—Creates a new inotify object.
+///
+/// Use the [`CreateFlags::CLOEXEC`] flag to prevent the resulting file
+/// descriptor from being implicitly passed across `exec` boundaries.
+#[doc(alias = "inotify_init1")]
+pub fn inotify_init(flags: CreateFlags) -> io::Result<OwnedFd> {
+    // SAFETY: `inotify_init1` has no safety preconditions.
+    unsafe { ret_owned_fd(c::inotify_init1(bitflags_bits!(flags))) }
+}
+
+/// `inotify_add_watch(self, path, flags)`—Adds a watch to inotify.
+///
+/// This registers or updates a watch for the filesystem path `path` and
+/// returns a watch descriptor corresponding to this watch.
+///
+/// Note: Due to the existence of hardlinks, providing two different paths to
+/// this method may result in it returning the same watch descriptor. An
+/// application should keep track of this externally to avoid logic errors.
+pub fn inotify_add_watch<P: crate::path::Arg>(
+    inot: BorrowedFd<'_>,
+    path: P,
+    flags: WatchFlags,
+) -> io::Result<i32> {
+    path.into_with_c_str(|path| {
+        // SAFETY: The fd and path we are passing is guaranteed valid by the
+        // type system.
+        unsafe {
+            ret_c_int(c::inotify_add_watch(
+                borrowed_fd(inot),
+                c_str(path),
+                flags.bits(),
+            ))
+        }
+    })
+}
+
+/// `inotify_rm_watch(self, wd)`—Removes a watch from this inotify.
+///
+/// The watch descriptor provided should have previously been returned by
+/// [`inotify_add_watch`] and not previously have been removed.
+#[doc(alias = "inotify_rm_watch")]
+pub fn inotify_remove_watch(inot: BorrowedFd<'_>, wd: i32) -> io::Result<()> {
+    // Android's `inotify_rm_watch` takes `u32` despite that
+    // `inotify_add_watch` expects a `i32`.
+    #[cfg(target_os = "android")]
+    let wd = wd as u32;
+    // SAFETY: The fd is valid and closing an arbitrary wd is valid.
+    unsafe { ret(c::inotify_rm_watch(borrowed_fd(inot), wd)) }
+}
diff --git a/vendor/rustix/src/backend/libc/fs/makedev.rs b/vendor/rustix/src/backend/libc/fs/makedev.rs
new file mode 100644
index 0000000..aa12102
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/fs/makedev.rs
@@ -0,0 +1,138 @@
+#[cfg(not(all(target_os = "android", target_pointer_width = "32")))]
+use crate::backend::c;
+use crate::fs::Dev;
+
+#[cfg(not(any(
+    apple,
+    solarish,
+    target_os = "aix",
+    target_os = "android",
+    target_os = "emscripten",
+)))]
+#[inline]
+pub(crate) fn makedev(maj: u32, min: u32) -> Dev {
+    c::makedev(maj, min)
+}
+
+#[cfg(solarish)]
+pub(crate) fn makedev(maj: u32, min: u32) -> Dev {
+    // SAFETY: Solarish's `makedev` is marked unsafe but it isn't doing
+    // anything unsafe.
+    unsafe { c::makedev(maj, min) }
+}
+
+#[cfg(all(target_os = "android", not(target_pointer_width = "32")))]
+#[inline]
+pub(crate) fn makedev(maj: u32, min: u32) -> Dev {
+    c::makedev(maj, min)
+}
+
+#[cfg(all(target_os = "android", target_pointer_width = "32"))]
+#[inline]
+pub(crate) fn makedev(maj: u32, min: u32) -> Dev {
+    // 32-bit Android's `dev_t` is 32-bit, but its `st_dev` is 64-bit, so we do
+    // it ourselves.
+    ((u64::from(maj) & 0xffff_f000_u64) << 32)
+        | ((u64::from(maj) & 0x0000_0fff_u64) << 8)
+        | ((u64::from(min) & 0xffff_ff00_u64) << 12)
+        | (u64::from(min) & 0x0000_00ff_u64)
+}
+
+#[cfg(target_os = "emscripten")]
+#[inline]
+pub(crate) fn makedev(maj: u32, min: u32) -> Dev {
+    // Emscripten's `makedev` has a 32-bit return value.
+    Dev::from(c::makedev(maj, min))
+}
+
+#[cfg(apple)]
+#[inline]
+pub(crate) fn makedev(maj: u32, min: u32) -> Dev {
+    // Apple's `makedev` oddly has signed argument types and is `unsafe`.
+    unsafe { c::makedev(maj as i32, min as i32) }
+}
+
+#[cfg(target_os = "aix")]
+#[inline]
+pub(crate) fn makedev(maj: u32, min: u32) -> Dev {
+    // AIX's `makedev` oddly is `unsafe`.
+    unsafe { c::makedev(maj, min) }
+}
+
+#[cfg(not(any(
+    apple,
+    freebsdlike,
+    target_os = "android",
+    target_os = "emscripten",
+    target_os = "netbsd"
+)))]
+#[inline]
+pub(crate) fn major(dev: Dev) -> u32 {
+    unsafe { c::major(dev) }
+}
+
+#[cfg(any(
+    apple,
+    freebsdlike,
+    target_os = "netbsd",
+    all(target_os = "android", not(target_pointer_width = "32")),
+))]
+#[inline]
+pub(crate) fn major(dev: Dev) -> u32 {
+    // On some platforms `major` oddly has signed return types.
+    (unsafe { c::major(dev) }) as u32
+}
+
+#[cfg(all(target_os = "android", target_pointer_width = "32"))]
+#[inline]
+pub(crate) fn major(dev: Dev) -> u32 {
+    // 32-bit Android's `dev_t` is 32-bit, but its `st_dev` is 64-bit, so we do
+    // it ourselves.
+    (((dev >> 31 >> 1) & 0xffff_f000) | ((dev >> 8) & 0x0000_0fff)) as u32
+}
+
+#[cfg(target_os = "emscripten")]
+#[inline]
+pub(crate) fn major(dev: Dev) -> u32 {
+    // Emscripten's `major` has a 32-bit argument value.
+    unsafe { c::major(dev as u32) }
+}
+
+#[cfg(not(any(
+    apple,
+    freebsdlike,
+    target_os = "android",
+    target_os = "emscripten",
+    target_os = "netbsd"
+)))]
+#[inline]
+pub(crate) fn minor(dev: Dev) -> u32 {
+    unsafe { c::minor(dev) }
+}
+
+#[cfg(any(
+    apple,
+    freebsdlike,
+    target_os = "netbsd",
+    all(target_os = "android", not(target_pointer_width = "32"))
+))]
+#[inline]
+pub(crate) fn minor(dev: Dev) -> u32 {
+    // On some platforms, `minor` oddly has signed return types.
+    (unsafe { c::minor(dev) }) as u32
+}
+
+#[cfg(all(target_os = "android", target_pointer_width = "32"))]
+#[inline]
+pub(crate) fn minor(dev: Dev) -> u32 {
+    // 32-bit Android's `dev_t` is 32-bit, but its `st_dev` is 64-bit, so we do
+    // it ourselves.
+    (((dev >> 12) & 0xffff_ff00) | (dev & 0x0000_00ff)) as u32
+}
+
+#[cfg(target_os = "emscripten")]
+#[inline]
+pub(crate) fn minor(dev: Dev) -> u32 {
+    // Emscripten's `minor` has a 32-bit argument value.
+    unsafe { c::minor(dev as u32) }
+}
diff --git a/vendor/rustix/src/backend/libc/fs/mod.rs b/vendor/rustix/src/backend/libc/fs/mod.rs
new file mode 100644
index 0000000..c17e863
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/fs/mod.rs
@@ -0,0 +1,23 @@
+#[cfg(all(feature = "alloc", not(any(target_os = "espidf", target_os = "redox"))))]
+pub(crate) mod dir;
+#[cfg(linux_kernel)]
+pub mod inotify;
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) mod makedev;
+#[cfg(not(windows))]
+pub(crate) mod syscalls;
+pub(crate) mod types;
+
+// TODO: Fix linux-raw-sys to define ioctl codes for sparc.
+#[cfg(all(linux_kernel, any(target_arch = "sparc", target_arch = "sparc64")))]
+pub(crate) const EXT4_IOC_RESIZE_FS: crate::ioctl::RawOpcode = 0x8008_6610;
+
+#[cfg(all(linux_kernel, not(any(target_arch = "sparc", target_arch = "sparc64"))))]
+pub(crate) const EXT4_IOC_RESIZE_FS: crate::ioctl::RawOpcode =
+    linux_raw_sys::ioctl::EXT4_IOC_RESIZE_FS as crate::ioctl::RawOpcode;
diff --git a/vendor/rustix/src/backend/libc/fs/syscalls.rs b/vendor/rustix/src/backend/libc/fs/syscalls.rs
new file mode 100644
index 0000000..70e86cf
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/fs/syscalls.rs
@@ -0,0 +1,2514 @@
+//! libc syscalls supporting `rustix::fs`.
+
+use crate::backend::c;
+#[cfg(any(
+    not(target_os = "redox"),
+    feature = "alloc",
+    all(linux_kernel, feature = "procfs")
+))]
+use crate::backend::conv::ret_usize;
+use crate::backend::conv::{borrowed_fd, c_str, ret, ret_c_int, ret_off_t, ret_owned_fd};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::ffi::CStr;
+#[cfg(all(apple, feature = "alloc"))]
+use crate::ffi::CString;
+#[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+use crate::fs::Access;
+#[cfg(not(any(
+    apple,
+    netbsdlike,
+    solarish,
+    target_os = "dragonfly",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "redox",
+    target_os = "vita",
+)))]
+use crate::fs::Advice;
+#[cfg(not(any(target_os = "espidf", target_os = "redox")))]
+use crate::fs::AtFlags;
+#[cfg(not(any(
+    netbsdlike,
+    solarish,
+    target_os = "aix",
+    target_os = "dragonfly",
+    target_os = "espidf",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+)))]
+use crate::fs::FallocateFlags;
+#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+use crate::fs::FlockOperation;
+#[cfg(any(linux_kernel, target_os = "freebsd"))]
+use crate::fs::MemfdFlags;
+#[cfg(any(linux_kernel, target_os = "freebsd", target_os = "fuchsia"))]
+use crate::fs::SealFlags;
+#[cfg(not(any(
+    solarish,
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "netbsd",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+use crate::fs::StatFs;
+#[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+use crate::fs::Timestamps;
+#[cfg(not(any(
+    apple,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use crate::fs::{Dev, FileType};
+use crate::fs::{Mode, OFlags, SeekFrom, Stat};
+#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))]
+use crate::fs::{StatVfs, StatVfsMountFlags};
+use crate::io;
+#[cfg(all(target_env = "gnu", fix_y2038))]
+use crate::timespec::LibcTimespec;
+#[cfg(not(target_os = "wasi"))]
+use crate::ugid::{Gid, Uid};
+#[cfg(all(apple, feature = "alloc"))]
+use alloc::vec;
+use core::mem::MaybeUninit;
+#[cfg(apple)]
+use {
+    crate::backend::conv::nonnegative_ret,
+    crate::fs::{copyfile_state_t, CloneFlags, CopyfileFlags},
+};
+#[cfg(any(apple, linux_kernel))]
+use {crate::fs::XattrFlags, core::mem::size_of, core::ptr::null_mut};
+#[cfg(linux_kernel)]
+use {
+    crate::fs::{RenameFlags, ResolveFlags, Statx, StatxFlags, CWD},
+    core::ptr::null,
+};
+
+#[cfg(all(target_env = "gnu", fix_y2038))]
+weak!(fn __utimensat64(c::c_int, *const c::c_char, *const LibcTimespec, c::c_int) -> c::c_int);
+#[cfg(all(target_env = "gnu", fix_y2038))]
+weak!(fn __futimens64(c::c_int, *const LibcTimespec) -> c::c_int);
+
+/// Use a direct syscall (via libc) for `open`.
+///
+/// This is only currently necessary as a workaround for old glibc; see below.
+#[cfg(all(unix, target_env = "gnu"))]
+fn open_via_syscall(path: &CStr, oflags: OFlags, mode: Mode) -> io::Result<OwnedFd> {
+    // Linux on aarch64, loongarch64 and riscv64 has no `open` syscall so use
+    // `openat`.
+    #[cfg(any(
+        target_arch = "aarch64",
+        target_arch = "riscv32",
+        target_arch = "riscv64",
+        target_arch = "csky",
+        target_arch = "loongarch64"
+    ))]
+    {
+        openat_via_syscall(CWD, path, oflags, mode)
+    }
+
+    // Use the `open` syscall.
+    #[cfg(not(any(
+        target_arch = "aarch64",
+        target_arch = "riscv32",
+        target_arch = "riscv64",
+        target_arch = "csky",
+        target_arch = "loongarch64"
+    )))]
+    unsafe {
+        syscall! {
+            fn open(
+                pathname: *const c::c_char,
+                oflags: c::c_int,
+                mode: c::mode_t
+            ) via SYS_open -> c::c_int
+        }
+
+        ret_owned_fd(open(
+            c_str(path),
+            bitflags_bits!(oflags),
+            bitflags_bits!(mode),
+        ))
+    }
+}
+
+pub(crate) fn open(path: &CStr, oflags: OFlags, mode: Mode) -> io::Result<OwnedFd> {
+    // Work around <https://sourceware.org/bugzilla/show_bug.cgi?id=17523>.
+    // glibc versions before 2.25 don't handle `O_TMPFILE` correctly.
+    #[cfg(all(unix, target_env = "gnu", not(target_os = "hurd")))]
+    if oflags.contains(OFlags::TMPFILE) && crate::backend::if_glibc_is_less_than_2_25() {
+        return open_via_syscall(path, oflags, mode);
+    }
+
+    // On these platforms, `mode_t` is `u16` and can't be passed directly to a
+    // variadic function.
+    #[cfg(any(
+        apple,
+        freebsdlike,
+        all(target_os = "android", target_pointer_width = "32")
+    ))]
+    let mode: c::c_uint = mode.bits().into();
+
+    // Otherwise, cast to `mode_t` as that's what `open` is documented to take.
+    #[cfg(not(any(
+        apple,
+        freebsdlike,
+        all(target_os = "android", target_pointer_width = "32")
+    )))]
+    let mode: c::mode_t = mode.bits() as _;
+
+    unsafe { ret_owned_fd(c::open(c_str(path), bitflags_bits!(oflags), mode)) }
+}
+
+/// Use a direct syscall (via libc) for `openat`.
+///
+/// This is only currently necessary as a workaround for old glibc; see below.
+#[cfg(all(unix, target_env = "gnu", not(target_os = "hurd")))]
+fn openat_via_syscall(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    oflags: OFlags,
+    mode: Mode,
+) -> io::Result<OwnedFd> {
+    syscall! {
+        fn openat(
+            base_dirfd: c::c_int,
+            pathname: *const c::c_char,
+            oflags: c::c_int,
+            mode: c::mode_t
+        ) via SYS_openat -> c::c_int
+    }
+
+    unsafe {
+        ret_owned_fd(openat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            bitflags_bits!(oflags),
+            bitflags_bits!(mode),
+        ))
+    }
+}
+
+#[cfg(not(target_os = "redox"))]
+pub(crate) fn openat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    oflags: OFlags,
+    mode: Mode,
+) -> io::Result<OwnedFd> {
+    // Work around <https://sourceware.org/bugzilla/show_bug.cgi?id=17523>.
+    // glibc versions before 2.25 don't handle `O_TMPFILE` correctly.
+    #[cfg(all(unix, target_env = "gnu", not(target_os = "hurd")))]
+    if oflags.contains(OFlags::TMPFILE) && crate::backend::if_glibc_is_less_than_2_25() {
+        return openat_via_syscall(dirfd, path, oflags, mode);
+    }
+
+    // On these platforms, `mode_t` is `u16` and can't be passed directly to a
+    // variadic function.
+    #[cfg(any(
+        apple,
+        freebsdlike,
+        all(target_os = "android", target_pointer_width = "32")
+    ))]
+    let mode: c::c_uint = mode.bits().into();
+
+    // Otherwise, cast to `mode_t` as that's what `open` is documented to take.
+    #[cfg(not(any(
+        apple,
+        freebsdlike,
+        all(target_os = "android", target_pointer_width = "32")
+    )))]
+    let mode: c::mode_t = mode.bits() as _;
+
+    unsafe {
+        ret_owned_fd(c::openat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            bitflags_bits!(oflags),
+            mode,
+        ))
+    }
+}
+
+#[cfg(not(any(
+    solarish,
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "netbsd",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+#[inline]
+pub(crate) fn statfs(filename: &CStr) -> io::Result<StatFs> {
+    unsafe {
+        let mut result = MaybeUninit::<StatFs>::uninit();
+        ret(c::statfs(c_str(filename), result.as_mut_ptr()))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))]
+#[inline]
+pub(crate) fn statvfs(filename: &CStr) -> io::Result<StatVfs> {
+    unsafe {
+        let mut result = MaybeUninit::<c::statvfs>::uninit();
+        ret(c::statvfs(c_str(filename), result.as_mut_ptr()))?;
+        Ok(libc_statvfs_to_statvfs(result.assume_init()))
+    }
+}
+
+#[cfg(feature = "alloc")]
+#[inline]
+pub(crate) fn readlink(path: &CStr, buf: &mut [u8]) -> io::Result<usize> {
+    unsafe {
+        ret_usize(
+            c::readlink(c_str(path), buf.as_mut_ptr().cast::<c::c_char>(), buf.len()) as isize,
+        )
+    }
+}
+
+#[cfg(not(target_os = "redox"))]
+#[inline]
+pub(crate) fn readlinkat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    buf: &mut [MaybeUninit<u8>],
+) -> io::Result<usize> {
+    unsafe {
+        ret_usize(c::readlinkat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            buf.as_mut_ptr().cast::<c::c_char>(),
+            buf.len(),
+        ) as isize)
+    }
+}
+
+pub(crate) fn mkdir(path: &CStr, mode: Mode) -> io::Result<()> {
+    unsafe { ret(c::mkdir(c_str(path), mode.bits() as c::mode_t)) }
+}
+
+#[cfg(not(target_os = "redox"))]
+pub(crate) fn mkdirat(dirfd: BorrowedFd<'_>, path: &CStr, mode: Mode) -> io::Result<()> {
+    unsafe {
+        ret(c::mkdirat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            mode.bits() as c::mode_t,
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn getdents_uninit(
+    fd: BorrowedFd<'_>,
+    buf: &mut [MaybeUninit<u8>],
+) -> io::Result<usize> {
+    syscall! {
+        fn getdents64(
+            fd: c::c_int,
+            dirp: *mut c::c_void,
+            count: usize
+        ) via SYS_getdents64 -> c::ssize_t
+    }
+    unsafe {
+        ret_usize(getdents64(
+            borrowed_fd(fd),
+            buf.as_mut_ptr().cast::<c::c_void>(),
+            buf.len(),
+        ))
+    }
+}
+
+pub(crate) fn link(old_path: &CStr, new_path: &CStr) -> io::Result<()> {
+    unsafe { ret(c::link(c_str(old_path), c_str(new_path))) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "redox")))]
+pub(crate) fn linkat(
+    old_dirfd: BorrowedFd<'_>,
+    old_path: &CStr,
+    new_dirfd: BorrowedFd<'_>,
+    new_path: &CStr,
+    flags: AtFlags,
+) -> io::Result<()> {
+    // macOS <= 10.9 lacks `linkat`.
+    #[cfg(target_os = "macos")]
+    unsafe {
+        weak! {
+            fn linkat(
+                c::c_int,
+                *const c::c_char,
+                c::c_int,
+                *const c::c_char,
+                c::c_int
+            ) -> c::c_int
+        }
+        // If we have `linkat`, use it.
+        if let Some(libc_linkat) = linkat.get() {
+            return ret(libc_linkat(
+                borrowed_fd(old_dirfd),
+                c_str(old_path),
+                borrowed_fd(new_dirfd),
+                c_str(new_path),
+                bitflags_bits!(flags),
+            ));
+        }
+        // Otherwise, see if we can emulate the `AT_FDCWD` case.
+        if borrowed_fd(old_dirfd) != c::AT_FDCWD || borrowed_fd(new_dirfd) != c::AT_FDCWD {
+            return Err(io::Errno::NOSYS);
+        }
+        if flags.intersects(!AtFlags::SYMLINK_FOLLOW) {
+            return Err(io::Errno::INVAL);
+        }
+        if !flags.is_empty() {
+            return Err(io::Errno::OPNOTSUPP);
+        }
+        ret(c::link(c_str(old_path), c_str(new_path)))
+    }
+
+    #[cfg(not(target_os = "macos"))]
+    unsafe {
+        ret(c::linkat(
+            borrowed_fd(old_dirfd),
+            c_str(old_path),
+            borrowed_fd(new_dirfd),
+            c_str(new_path),
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+pub(crate) fn rmdir(path: &CStr) -> io::Result<()> {
+    unsafe { ret(c::rmdir(c_str(path))) }
+}
+
+pub(crate) fn unlink(path: &CStr) -> io::Result<()> {
+    unsafe { ret(c::unlink(c_str(path))) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "redox")))]
+pub(crate) fn unlinkat(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<()> {
+    // macOS <= 10.9 lacks `unlinkat`.
+    #[cfg(target_os = "macos")]
+    unsafe {
+        weak! {
+            fn unlinkat(
+                c::c_int,
+                *const c::c_char,
+                c::c_int
+            ) -> c::c_int
+        }
+        // If we have `unlinkat`, use it.
+        if let Some(libc_unlinkat) = unlinkat.get() {
+            return ret(libc_unlinkat(
+                borrowed_fd(dirfd),
+                c_str(path),
+                bitflags_bits!(flags),
+            ));
+        }
+        // Otherwise, see if we can emulate the `AT_FDCWD` case.
+        if borrowed_fd(dirfd) != c::AT_FDCWD {
+            return Err(io::Errno::NOSYS);
+        }
+        if flags.intersects(!AtFlags::REMOVEDIR) {
+            return Err(io::Errno::INVAL);
+        }
+        if flags.contains(AtFlags::REMOVEDIR) {
+            ret(c::rmdir(c_str(path)))
+        } else {
+            ret(c::unlink(c_str(path)))
+        }
+    }
+
+    #[cfg(not(target_os = "macos"))]
+    unsafe {
+        ret(c::unlinkat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+pub(crate) fn rename(old_path: &CStr, new_path: &CStr) -> io::Result<()> {
+    unsafe { ret(c::rename(c_str(old_path), c_str(new_path))) }
+}
+
+#[cfg(not(target_os = "redox"))]
+pub(crate) fn renameat(
+    old_dirfd: BorrowedFd<'_>,
+    old_path: &CStr,
+    new_dirfd: BorrowedFd<'_>,
+    new_path: &CStr,
+) -> io::Result<()> {
+    // macOS <= 10.9 lacks `renameat`.
+    #[cfg(target_os = "macos")]
+    unsafe {
+        weak! {
+            fn renameat(
+                c::c_int,
+                *const c::c_char,
+                c::c_int,
+                *const c::c_char
+            ) -> c::c_int
+        }
+        // If we have `renameat`, use it.
+        if let Some(libc_renameat) = renameat.get() {
+            return ret(libc_renameat(
+                borrowed_fd(old_dirfd),
+                c_str(old_path),
+                borrowed_fd(new_dirfd),
+                c_str(new_path),
+            ));
+        }
+        // Otherwise, see if we can emulate the `AT_FDCWD` case.
+        if borrowed_fd(old_dirfd) != c::AT_FDCWD || borrowed_fd(new_dirfd) != c::AT_FDCWD {
+            return Err(io::Errno::NOSYS);
+        }
+        ret(c::rename(c_str(old_path), c_str(new_path)))
+    }
+
+    #[cfg(not(target_os = "macos"))]
+    unsafe {
+        ret(c::renameat(
+            borrowed_fd(old_dirfd),
+            c_str(old_path),
+            borrowed_fd(new_dirfd),
+            c_str(new_path),
+        ))
+    }
+}
+
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+pub(crate) fn renameat2(
+    old_dirfd: BorrowedFd<'_>,
+    old_path: &CStr,
+    new_dirfd: BorrowedFd<'_>,
+    new_path: &CStr,
+    flags: RenameFlags,
+) -> io::Result<()> {
+    // `renameat2` wasn't supported in glibc until 2.28.
+    weak_or_syscall! {
+        fn renameat2(
+            olddirfd: c::c_int,
+            oldpath: *const c::c_char,
+            newdirfd: c::c_int,
+            newpath: *const c::c_char,
+            flags: c::c_uint
+        ) via SYS_renameat2 -> c::c_int
+    }
+
+    unsafe {
+        ret(renameat2(
+            borrowed_fd(old_dirfd),
+            c_str(old_path),
+            borrowed_fd(new_dirfd),
+            c_str(new_path),
+            flags.bits(),
+        ))
+    }
+}
+
+#[cfg(any(
+    target_os = "android",
+    all(target_os = "linux", not(target_env = "gnu")),
+))]
+#[inline]
+pub(crate) fn renameat2(
+    old_dirfd: BorrowedFd<'_>,
+    old_path: &CStr,
+    new_dirfd: BorrowedFd<'_>,
+    new_path: &CStr,
+    flags: RenameFlags,
+) -> io::Result<()> {
+    // At present, `libc` only has `renameat2` defined for glibc. If we have
+    // no flags, we can use plain `renameat`, but otherwise we use `syscall!`.
+    // to call `renameat2` ourselves.
+    if flags.is_empty() {
+        renameat(old_dirfd, old_path, new_dirfd, new_path)
+    } else {
+        syscall! {
+            fn renameat2(
+                olddirfd: c::c_int,
+                oldpath: *const c::c_char,
+                newdirfd: c::c_int,
+                newpath: *const c::c_char,
+                flags: c::c_uint
+            ) via SYS_renameat2 -> c::c_int
+        }
+
+        unsafe {
+            ret(renameat2(
+                borrowed_fd(old_dirfd),
+                c_str(old_path),
+                borrowed_fd(new_dirfd),
+                c_str(new_path),
+                flags.bits(),
+            ))
+        }
+    }
+}
+
+pub(crate) fn symlink(old_path: &CStr, new_path: &CStr) -> io::Result<()> {
+    unsafe { ret(c::symlink(c_str(old_path), c_str(new_path))) }
+}
+
+#[cfg(not(target_os = "redox"))]
+pub(crate) fn symlinkat(
+    old_path: &CStr,
+    new_dirfd: BorrowedFd<'_>,
+    new_path: &CStr,
+) -> io::Result<()> {
+    unsafe {
+        ret(c::symlinkat(
+            c_str(old_path),
+            borrowed_fd(new_dirfd),
+            c_str(new_path),
+        ))
+    }
+}
+
+pub(crate) fn stat(path: &CStr) -> io::Result<Stat> {
+    // See the comments in `fstat` about using `crate::fs::statx` here.
+    #[cfg(all(
+        linux_kernel,
+        any(
+            target_pointer_width = "32",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )
+    ))]
+    {
+        match crate::fs::statx(
+            crate::fs::CWD,
+            path,
+            AtFlags::empty(),
+            StatxFlags::BASIC_STATS,
+        ) {
+            Ok(x) => statx_to_stat(x),
+            Err(io::Errno::NOSYS) => statat_old(crate::fs::CWD, path, AtFlags::empty()),
+            Err(err) => Err(err),
+        }
+    }
+
+    // Main version: libc is y2038 safe. Or, the platform is not y2038 safe and
+    // there's nothing practical we can do.
+    #[cfg(not(all(
+        linux_kernel,
+        any(
+            target_pointer_width = "32",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )
+    )))]
+    unsafe {
+        let mut stat = MaybeUninit::<Stat>::uninit();
+        ret(c::stat(c_str(path), stat.as_mut_ptr()))?;
+        Ok(stat.assume_init())
+    }
+}
+
+pub(crate) fn lstat(path: &CStr) -> io::Result<Stat> {
+    // See the comments in `fstat` about using `crate::fs::statx` here.
+    #[cfg(all(
+        linux_kernel,
+        any(
+            target_pointer_width = "32",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )
+    ))]
+    {
+        match crate::fs::statx(
+            crate::fs::CWD,
+            path,
+            AtFlags::SYMLINK_NOFOLLOW,
+            StatxFlags::BASIC_STATS,
+        ) {
+            Ok(x) => statx_to_stat(x),
+            Err(io::Errno::NOSYS) => statat_old(crate::fs::CWD, path, AtFlags::SYMLINK_NOFOLLOW),
+            Err(err) => Err(err),
+        }
+    }
+
+    // Main version: libc is y2038 safe. Or, the platform is not y2038 safe and
+    // there's nothing practical we can do.
+    #[cfg(not(all(
+        linux_kernel,
+        any(
+            target_pointer_width = "32",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )
+    )))]
+    unsafe {
+        let mut stat = MaybeUninit::<Stat>::uninit();
+        ret(c::lstat(c_str(path), stat.as_mut_ptr()))?;
+        Ok(stat.assume_init())
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "redox")))]
+pub(crate) fn statat(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<Stat> {
+    // See the comments in `fstat` about using `crate::fs::statx` here.
+    #[cfg(all(
+        linux_kernel,
+        any(
+            target_pointer_width = "32",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )
+    ))]
+    {
+        match crate::fs::statx(dirfd, path, flags, StatxFlags::BASIC_STATS) {
+            Ok(x) => statx_to_stat(x),
+            Err(io::Errno::NOSYS) => statat_old(dirfd, path, flags),
+            Err(err) => Err(err),
+        }
+    }
+
+    // Main version: libc is y2038 safe. Or, the platform is not y2038 safe and
+    // there's nothing practical we can do.
+    #[cfg(not(all(
+        linux_kernel,
+        any(
+            target_pointer_width = "32",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )
+    )))]
+    unsafe {
+        let mut stat = MaybeUninit::<Stat>::uninit();
+        ret(c::fstatat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            stat.as_mut_ptr(),
+            bitflags_bits!(flags),
+        ))?;
+        Ok(stat.assume_init())
+    }
+}
+
+#[cfg(all(
+    linux_kernel,
+    any(
+        target_pointer_width = "32",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    )
+))]
+fn statat_old(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<Stat> {
+    unsafe {
+        let mut result = MaybeUninit::<c::stat64>::uninit();
+        ret(c::fstatat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            result.as_mut_ptr(),
+            bitflags_bits!(flags),
+        ))?;
+        stat64_to_stat(result.assume_init())
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "emscripten", target_os = "vita")))]
+pub(crate) fn access(path: &CStr, access: Access) -> io::Result<()> {
+    unsafe { ret(c::access(c_str(path), access.bits())) }
+}
+
+#[cfg(not(any(
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita"
+)))]
+pub(crate) fn accessat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    access: Access,
+    flags: AtFlags,
+) -> io::Result<()> {
+    // macOS <= 10.9 lacks `faccessat`.
+    #[cfg(target_os = "macos")]
+    unsafe {
+        weak! {
+            fn faccessat(
+                c::c_int,
+                *const c::c_char,
+                c::c_int,
+                c::c_int
+            ) -> c::c_int
+        }
+        // If we have `faccessat`, use it.
+        if let Some(libc_faccessat) = faccessat.get() {
+            return ret(libc_faccessat(
+                borrowed_fd(dirfd),
+                c_str(path),
+                bitflags_bits!(access),
+                bitflags_bits!(flags),
+            ));
+        }
+        // Otherwise, see if we can emulate the `AT_FDCWD` case.
+        if borrowed_fd(dirfd) != c::AT_FDCWD {
+            return Err(io::Errno::NOSYS);
+        }
+        if flags.intersects(!(AtFlags::EACCESS | AtFlags::SYMLINK_NOFOLLOW)) {
+            return Err(io::Errno::INVAL);
+        }
+        if !flags.is_empty() {
+            return Err(io::Errno::OPNOTSUPP);
+        }
+        ret(c::access(c_str(path), bitflags_bits!(access)))
+    }
+
+    #[cfg(not(target_os = "macos"))]
+    unsafe {
+        ret(c::faccessat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            bitflags_bits!(access),
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(target_os = "emscripten")]
+pub(crate) fn access(_path: &CStr, _access: Access) -> io::Result<()> {
+    Ok(())
+}
+
+#[cfg(target_os = "emscripten")]
+pub(crate) fn accessat(
+    _dirfd: BorrowedFd<'_>,
+    _path: &CStr,
+    _access: Access,
+    _flags: AtFlags,
+) -> io::Result<()> {
+    Ok(())
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "redox", target_os = "vita")))]
+pub(crate) fn utimensat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    times: &Timestamps,
+    flags: AtFlags,
+) -> io::Result<()> {
+    // Old 32-bit version: libc has `utimensat` but it is not y2038 safe by
+    // default. But there may be a `__utimensat16` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_utimensat) = __utimensat64.get() {
+            let libc_times: [LibcTimespec; 2] = [
+                times.last_access.clone().into(),
+                times.last_modification.clone().into(),
+            ];
+
+            unsafe {
+                return ret(libc_utimensat(
+                    borrowed_fd(dirfd),
+                    c_str(path),
+                    libc_times.as_ptr(),
+                    bitflags_bits!(flags),
+                ));
+            }
+        }
+
+        utimensat_old(dirfd, path, times, flags)
+    }
+
+    // Main version: libc is y2038 safe and has `utimensat`. Or, the platform
+    // is not y2038 safe and there's nothing practical we can do.
+    #[cfg(not(any(apple, fix_y2038)))]
+    unsafe {
+        use crate::utils::as_ptr;
+
+        ret(c::utimensat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            as_ptr(times).cast(),
+            bitflags_bits!(flags),
+        ))
+    }
+
+    // Apple version: `utimensat` was introduced in macOS 10.13.
+    #[cfg(apple)]
+    unsafe {
+        use crate::utils::as_ptr;
+
+        // ABI details
+        weak! {
+            fn utimensat(
+                c::c_int,
+                *const c::c_char,
+                *const c::timespec,
+                c::c_int
+            ) -> c::c_int
+        }
+        extern "C" {
+            fn setattrlist(
+                path: *const c::c_char,
+                attr_list: *const Attrlist,
+                attr_buf: *const c::c_void,
+                attr_buf_size: c::size_t,
+                options: c::c_ulong,
+            ) -> c::c_int;
+        }
+        const FSOPT_NOFOLLOW: c::c_ulong = 0x0000_0001;
+
+        // If we have `utimensat`, use it.
+        if let Some(have_utimensat) = utimensat.get() {
+            return ret(have_utimensat(
+                borrowed_fd(dirfd),
+                c_str(path),
+                as_ptr(times).cast(),
+                bitflags_bits!(flags),
+            ));
+        }
+
+        // `setattrlistat` was introduced in 10.13 along with `utimensat`, so
+        // if we don't have `utimensat`, we don't have `setattrlistat` either.
+        // Emulate it using `fork`, and `fchdir` and [`setattrlist`].
+        //
+        // [`setattrlist`]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/setattrlist.2.html
+        match c::fork() {
+            -1 => Err(io::Errno::IO),
+            0 => {
+                if c::fchdir(borrowed_fd(dirfd)) != 0 {
+                    let code = match libc_errno::errno().0 {
+                        c::EACCES => 2,
+                        c::ENOTDIR => 3,
+                        _ => 1,
+                    };
+                    c::_exit(code);
+                }
+
+                let mut flags_arg = 0;
+                if flags.contains(AtFlags::SYMLINK_NOFOLLOW) {
+                    flags_arg |= FSOPT_NOFOLLOW;
+                }
+
+                let (attrbuf_size, times, attrs) = times_to_attrlist(times);
+
+                if setattrlist(
+                    c_str(path),
+                    &attrs,
+                    as_ptr(&times).cast(),
+                    attrbuf_size,
+                    flags_arg,
+                ) != 0
+                {
+                    // Translate expected `errno` codes into ad-hoc integer
+                    // values suitable for exit statuses.
+                    let code = match libc_errno::errno().0 {
+                        c::EACCES => 2,
+                        c::ENOTDIR => 3,
+                        c::EPERM => 4,
+                        c::EROFS => 5,
+                        c::ELOOP => 6,
+                        c::ENOENT => 7,
+                        c::ENAMETOOLONG => 8,
+                        c::EINVAL => 9,
+                        c::ESRCH => 10,
+                        c::ENOTSUP => 11,
+                        _ => 1,
+                    };
+                    c::_exit(code);
+                }
+
+                c::_exit(0);
+            }
+            child_pid => {
+                let mut wstatus = 0;
+                let _ = ret_c_int(c::waitpid(child_pid, &mut wstatus, 0))?;
+                if c::WIFEXITED(wstatus) {
+                    // Translate our ad-hoc exit statuses back to `errno`
+                    // codes.
+                    match c::WEXITSTATUS(wstatus) {
+                        0 => Ok(()),
+                        2 => Err(io::Errno::ACCESS),
+                        3 => Err(io::Errno::NOTDIR),
+                        4 => Err(io::Errno::PERM),
+                        5 => Err(io::Errno::ROFS),
+                        6 => Err(io::Errno::LOOP),
+                        7 => Err(io::Errno::NOENT),
+                        8 => Err(io::Errno::NAMETOOLONG),
+                        9 => Err(io::Errno::INVAL),
+                        10 => Err(io::Errno::SRCH),
+                        11 => Err(io::Errno::NOTSUP),
+                        _ => Err(io::Errno::IO),
+                    }
+                } else {
+                    Err(io::Errno::IO)
+                }
+            }
+        }
+    }
+}
+
+#[cfg(fix_y2038)]
+fn utimensat_old(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    times: &Timestamps,
+    flags: AtFlags,
+) -> io::Result<()> {
+    let old_times = [
+        c::timespec {
+            tv_sec: times
+                .last_access
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: times
+                .last_access
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+        },
+        c::timespec {
+            tv_sec: times
+                .last_modification
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: times
+                .last_modification
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+        },
+    ];
+    unsafe {
+        ret(c::utimensat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            old_times.as_ptr(),
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn chmod(path: &CStr, mode: Mode) -> io::Result<()> {
+    unsafe { ret(c::chmod(c_str(path), mode.bits() as c::mode_t)) }
+}
+
+#[cfg(not(any(
+    linux_kernel,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "wasi"
+)))]
+pub(crate) fn chmodat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    mode: Mode,
+    flags: AtFlags,
+) -> io::Result<()> {
+    unsafe {
+        ret(c::fchmodat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            mode.bits() as c::mode_t,
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn chmodat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    mode: Mode,
+    flags: AtFlags,
+) -> io::Result<()> {
+    // Linux's `fchmodat` does not have a flags argument.
+    //
+    // Use `c::syscall` rather than `c::fchmodat` because some libc
+    // implementations, such as musl, add extra logic to `fchmod` to emulate
+    // support for `AT_SYMLINK_NOFOLLOW`, which uses `/proc` outside our
+    // control.
+    syscall! {
+        fn fchmodat(
+            base_dirfd: c::c_int,
+            pathname: *const c::c_char,
+            mode: c::mode_t
+        ) via SYS_fchmodat -> c::c_int
+    }
+    if flags == AtFlags::SYMLINK_NOFOLLOW {
+        return Err(io::Errno::OPNOTSUPP);
+    }
+    if !flags.is_empty() {
+        return Err(io::Errno::INVAL);
+    }
+    unsafe {
+        ret(fchmodat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            mode.bits() as c::mode_t,
+        ))
+    }
+}
+
+#[cfg(apple)]
+pub(crate) fn fclonefileat(
+    srcfd: BorrowedFd<'_>,
+    dst_dirfd: BorrowedFd<'_>,
+    dst: &CStr,
+    flags: CloneFlags,
+) -> io::Result<()> {
+    syscall! {
+        fn fclonefileat(
+            srcfd: BorrowedFd<'_>,
+            dst_dirfd: BorrowedFd<'_>,
+            dst: *const c::c_char,
+            flags: c::c_int
+        ) via SYS_fclonefileat -> c::c_int
+    }
+
+    unsafe {
+        ret(fclonefileat(
+            srcfd,
+            dst_dirfd,
+            c_str(dst),
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "redox", target_os = "wasi")))]
+pub(crate) fn chownat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    owner: Option<Uid>,
+    group: Option<Gid>,
+    flags: AtFlags,
+) -> io::Result<()> {
+    unsafe {
+        let (ow, gr) = crate::ugid::translate_fchown_args(owner, group);
+        ret(c::fchownat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            ow,
+            gr,
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(not(any(
+    apple,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) fn mknodat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    file_type: FileType,
+    mode: Mode,
+    dev: Dev,
+) -> io::Result<()> {
+    unsafe {
+        ret(c::mknodat(
+            borrowed_fd(dirfd),
+            c_str(path),
+            (mode.bits() | file_type.as_raw_mode()) as c::mode_t,
+            dev.try_into().map_err(|_e| io::Errno::PERM)?,
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn copy_file_range(
+    fd_in: BorrowedFd<'_>,
+    off_in: Option<&mut u64>,
+    fd_out: BorrowedFd<'_>,
+    off_out: Option<&mut u64>,
+    len: usize,
+) -> io::Result<usize> {
+    syscall! {
+        fn copy_file_range(
+            fd_in: c::c_int,
+            off_in: *mut c::loff_t,
+            fd_out: c::c_int,
+            off_out: *mut c::loff_t,
+            len: usize,
+            flags: c::c_uint
+        ) via SYS_copy_file_range -> c::ssize_t
+    }
+
+    let mut off_in_val: c::loff_t = 0;
+    let mut off_out_val: c::loff_t = 0;
+    // Silently cast; we'll get `EINVAL` if the value is negative.
+    let off_in_ptr = if let Some(off_in) = &off_in {
+        off_in_val = **off_in as i64;
+        &mut off_in_val
+    } else {
+        null_mut()
+    };
+    let off_out_ptr = if let Some(off_out) = &off_out {
+        off_out_val = **off_out as i64;
+        &mut off_out_val
+    } else {
+        null_mut()
+    };
+    let copied = unsafe {
+        ret_usize(copy_file_range(
+            borrowed_fd(fd_in),
+            off_in_ptr,
+            borrowed_fd(fd_out),
+            off_out_ptr,
+            len,
+            0, // no flags are defined yet
+        ))?
+    };
+    if let Some(off_in) = off_in {
+        *off_in = off_in_val as u64;
+    }
+    if let Some(off_out) = off_out {
+        *off_out = off_out_val as u64;
+    }
+    Ok(copied)
+}
+
+#[cfg(not(any(
+    apple,
+    netbsdlike,
+    solarish,
+    target_os = "dragonfly",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "redox",
+    target_os = "vita",
+)))]
+pub(crate) fn fadvise(fd: BorrowedFd<'_>, offset: u64, len: u64, advice: Advice) -> io::Result<()> {
+    let offset = offset as i64;
+    let len = len as i64;
+
+    // FreeBSD returns `EINVAL` on invalid offsets; emulate the POSIX behavior.
+    #[cfg(target_os = "freebsd")]
+    let offset = if (offset as i64) < 0 {
+        i64::MAX
+    } else {
+        offset
+    };
+
+    // FreeBSD returns `EINVAL` on overflow; emulate the POSIX behavior.
+    #[cfg(target_os = "freebsd")]
+    let len = if len > 0 && offset.checked_add(len).is_none() {
+        i64::MAX - offset
+    } else {
+        len
+    };
+
+    let err = unsafe { c::posix_fadvise(borrowed_fd(fd), offset, len, advice as c::c_int) };
+
+    // `posix_fadvise` returns its error status rather than using `errno`.
+    if err == 0 {
+        Ok(())
+    } else {
+        Err(io::Errno(err))
+    }
+}
+
+pub(crate) fn fcntl_getfl(fd: BorrowedFd<'_>) -> io::Result<OFlags> {
+    let flags = unsafe { ret_c_int(c::fcntl(borrowed_fd(fd), c::F_GETFL))? };
+    Ok(OFlags::from_bits_retain(bitcast!(flags)))
+}
+
+pub(crate) fn fcntl_setfl(fd: BorrowedFd<'_>, flags: OFlags) -> io::Result<()> {
+    unsafe { ret(c::fcntl(borrowed_fd(fd), c::F_SETFL, flags.bits())) }
+}
+
+#[cfg(any(linux_kernel, target_os = "freebsd", target_os = "fuchsia"))]
+pub(crate) fn fcntl_get_seals(fd: BorrowedFd<'_>) -> io::Result<SealFlags> {
+    let flags = unsafe { ret_c_int(c::fcntl(borrowed_fd(fd), c::F_GET_SEALS))? };
+    Ok(SealFlags::from_bits_retain(bitcast!(flags)))
+}
+
+#[cfg(any(linux_kernel, target_os = "freebsd", target_os = "fuchsia"))]
+pub(crate) fn fcntl_add_seals(fd: BorrowedFd<'_>, seals: SealFlags) -> io::Result<()> {
+    unsafe { ret(c::fcntl(borrowed_fd(fd), c::F_ADD_SEALS, seals.bits())) }
+}
+
+#[cfg(not(any(
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn fcntl_lock(fd: BorrowedFd<'_>, operation: FlockOperation) -> io::Result<()> {
+    use c::{flock, F_RDLCK, F_SETLK, F_SETLKW, F_UNLCK, F_WRLCK, SEEK_SET};
+
+    let (cmd, l_type) = match operation {
+        FlockOperation::LockShared => (F_SETLKW, F_RDLCK),
+        FlockOperation::LockExclusive => (F_SETLKW, F_WRLCK),
+        FlockOperation::Unlock => (F_SETLKW, F_UNLCK),
+        FlockOperation::NonBlockingLockShared => (F_SETLK, F_RDLCK),
+        FlockOperation::NonBlockingLockExclusive => (F_SETLK, F_WRLCK),
+        FlockOperation::NonBlockingUnlock => (F_SETLK, F_UNLCK),
+    };
+
+    unsafe {
+        let mut lock: flock = core::mem::zeroed();
+        lock.l_type = l_type as _;
+
+        // When `l_len` is zero, this locks all the bytes from
+        // `l_whence`/`l_start` to the end of the file, even as the
+        // file grows dynamically.
+        lock.l_whence = SEEK_SET as _;
+        lock.l_start = 0;
+        lock.l_len = 0;
+
+        ret(c::fcntl(borrowed_fd(fd), cmd, &lock))
+    }
+}
+
+pub(crate) fn seek(fd: BorrowedFd<'_>, pos: SeekFrom) -> io::Result<u64> {
+    let (whence, offset) = match pos {
+        SeekFrom::Start(pos) => {
+            let pos: u64 = pos;
+            // Silently cast; we'll get `EINVAL` if the value is negative.
+            (c::SEEK_SET, pos as i64)
+        }
+        SeekFrom::End(offset) => (c::SEEK_END, offset),
+        SeekFrom::Current(offset) => (c::SEEK_CUR, offset),
+        #[cfg(any(apple, freebsdlike, linux_kernel, solarish))]
+        SeekFrom::Data(offset) => (c::SEEK_DATA, offset),
+        #[cfg(any(apple, freebsdlike, linux_kernel, solarish))]
+        SeekFrom::Hole(offset) => (c::SEEK_HOLE, offset),
+    };
+
+    // ESP-IDF and Vita don't support 64-bit offsets.
+    #[cfg(any(target_os = "espidf", target_os = "vita"))]
+    let offset: i32 = offset.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+
+    let offset = unsafe { ret_off_t(c::lseek(borrowed_fd(fd), offset, whence))? };
+    Ok(offset as u64)
+}
+
+pub(crate) fn tell(fd: BorrowedFd<'_>) -> io::Result<u64> {
+    let offset = unsafe { ret_off_t(c::lseek(borrowed_fd(fd), 0, c::SEEK_CUR))? };
+    Ok(offset as u64)
+}
+
+#[cfg(not(any(linux_kernel, target_os = "wasi")))]
+pub(crate) fn fchmod(fd: BorrowedFd<'_>, mode: Mode) -> io::Result<()> {
+    unsafe { ret(c::fchmod(borrowed_fd(fd), bitflags_bits!(mode))) }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn fchmod(fd: BorrowedFd<'_>, mode: Mode) -> io::Result<()> {
+    // Use `c::syscall` rather than `c::fchmod` because some libc
+    // implementations, such as musl, add extra logic to `fchmod` to emulate
+    // support for `O_PATH`, which uses `/proc` outside our control and
+    // interferes with our own use of `O_PATH`.
+    syscall! {
+        fn fchmod(
+            fd: c::c_int,
+            mode: c::mode_t
+        ) via SYS_fchmod -> c::c_int
+    }
+    unsafe { ret(fchmod(borrowed_fd(fd), mode.bits() as c::mode_t)) }
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn chown(path: &CStr, owner: Option<Uid>, group: Option<Gid>) -> io::Result<()> {
+    unsafe {
+        let (ow, gr) = crate::ugid::translate_fchown_args(owner, group);
+        ret(c::chown(c_str(path), ow, gr))
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn fchown(fd: BorrowedFd<'_>, owner: Option<Uid>, group: Option<Gid>) -> io::Result<()> {
+    // Use `c::syscall` rather than `c::fchown` because some libc
+    // implementations, such as musl, add extra logic to `fchown` to emulate
+    // support for `O_PATH`, which uses `/proc` outside our control and
+    // interferes with our own use of `O_PATH`.
+    syscall! {
+        fn fchown(
+            fd: c::c_int,
+            owner: c::uid_t,
+            group: c::gid_t
+        ) via SYS_fchown -> c::c_int
+    }
+    unsafe {
+        let (ow, gr) = crate::ugid::translate_fchown_args(owner, group);
+        ret(fchown(borrowed_fd(fd), ow, gr))
+    }
+}
+
+#[cfg(not(any(linux_kernel, target_os = "wasi")))]
+pub(crate) fn fchown(fd: BorrowedFd<'_>, owner: Option<Uid>, group: Option<Gid>) -> io::Result<()> {
+    unsafe {
+        let (ow, gr) = crate::ugid::translate_fchown_args(owner, group);
+        ret(c::fchown(borrowed_fd(fd), ow, gr))
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "solaris",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) fn flock(fd: BorrowedFd<'_>, operation: FlockOperation) -> io::Result<()> {
+    unsafe { ret(c::flock(borrowed_fd(fd), operation as c::c_int)) }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn syncfs(fd: BorrowedFd<'_>) -> io::Result<()> {
+    // Some versions of Android libc lack a `syncfs` function.
+    #[cfg(target_os = "android")]
+    syscall! {
+        fn syncfs(fd: c::c_int) via SYS_syncfs -> c::c_int
+    }
+
+    // `syncfs` was added to glibc in 2.20.
+    #[cfg(not(target_os = "android"))]
+    weak_or_syscall! {
+        fn syncfs(fd: c::c_int) via SYS_syncfs -> c::c_int
+    }
+
+    unsafe { ret(syncfs(borrowed_fd(fd))) }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) fn sync() {
+    unsafe { c::sync() }
+}
+
+pub(crate) fn fstat(fd: BorrowedFd<'_>) -> io::Result<Stat> {
+    // 32-bit and mips64 Linux: `struct stat64` is not y2038 compatible; use
+    // `statx`.
+    //
+    // And, some old platforms don't support `statx`, and some fail with a
+    // confusing error code, so we call `crate::fs::statx` to handle that. If
+    // `statx` isn't available, fall back to the buggy system call.
+    #[cfg(all(
+        linux_kernel,
+        any(
+            target_pointer_width = "32",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )
+    ))]
+    {
+        match crate::fs::statx(fd, cstr!(""), AtFlags::EMPTY_PATH, StatxFlags::BASIC_STATS) {
+            Ok(x) => statx_to_stat(x),
+            Err(io::Errno::NOSYS) => fstat_old(fd),
+            Err(err) => Err(err),
+        }
+    }
+
+    // Main version: libc is y2038 safe. Or, the platform is not y2038 safe and
+    // there's nothing practical we can do.
+    #[cfg(not(all(
+        linux_kernel,
+        any(
+            target_pointer_width = "32",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )
+    )))]
+    unsafe {
+        let mut stat = MaybeUninit::<Stat>::uninit();
+        ret(c::fstat(borrowed_fd(fd), stat.as_mut_ptr()))?;
+        Ok(stat.assume_init())
+    }
+}
+
+#[cfg(all(
+    linux_kernel,
+    any(
+        target_pointer_width = "32",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    )
+))]
+fn fstat_old(fd: BorrowedFd<'_>) -> io::Result<Stat> {
+    unsafe {
+        let mut result = MaybeUninit::<c::stat64>::uninit();
+        ret(c::fstat(borrowed_fd(fd), result.as_mut_ptr()))?;
+        stat64_to_stat(result.assume_init())
+    }
+}
+
+#[cfg(not(any(
+    solarish,
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "netbsd",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+pub(crate) fn fstatfs(fd: BorrowedFd<'_>) -> io::Result<StatFs> {
+    let mut statfs = MaybeUninit::<StatFs>::uninit();
+    unsafe {
+        ret(c::fstatfs(borrowed_fd(fd), statfs.as_mut_ptr()))?;
+        Ok(statfs.assume_init())
+    }
+}
+
+#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))]
+pub(crate) fn fstatvfs(fd: BorrowedFd<'_>) -> io::Result<StatVfs> {
+    let mut statvfs = MaybeUninit::<c::statvfs>::uninit();
+    unsafe {
+        ret(c::fstatvfs(borrowed_fd(fd), statvfs.as_mut_ptr()))?;
+        Ok(libc_statvfs_to_statvfs(statvfs.assume_init()))
+    }
+}
+
+#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))]
+fn libc_statvfs_to_statvfs(from: c::statvfs) -> StatVfs {
+    StatVfs {
+        f_bsize: from.f_bsize as u64,
+        f_frsize: from.f_frsize as u64,
+        f_blocks: from.f_blocks as u64,
+        f_bfree: from.f_bfree as u64,
+        f_bavail: from.f_bavail as u64,
+        f_files: from.f_files as u64,
+        f_ffree: from.f_ffree as u64,
+        f_favail: from.f_ffree as u64,
+        #[cfg(not(target_os = "aix"))]
+        f_fsid: from.f_fsid as u64,
+        #[cfg(target_os = "aix")]
+        f_fsid: ((from.f_fsid.val[0] as u64) << 32) | from.f_fsid.val[1],
+        f_flag: StatVfsMountFlags::from_bits_retain(from.f_flag as u64),
+        f_namemax: from.f_namemax as u64,
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+pub(crate) fn futimens(fd: BorrowedFd<'_>, times: &Timestamps) -> io::Result<()> {
+    // Old 32-bit version: libc has `futimens` but it is not y2038 safe by
+    // default. But there may be a `__futimens64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_futimens) = __futimens64.get() {
+            let libc_times: [LibcTimespec; 2] = [
+                times.last_access.clone().into(),
+                times.last_modification.clone().into(),
+            ];
+
+            unsafe {
+                return ret(libc_futimens(borrowed_fd(fd), libc_times.as_ptr()));
+            }
+        }
+
+        futimens_old(fd, times)
+    }
+
+    // Main version: libc is y2038 safe and has `futimens`. Or, the platform
+    // is not y2038 safe and there's nothing practical we can do.
+    #[cfg(not(any(apple, fix_y2038)))]
+    unsafe {
+        use crate::utils::as_ptr;
+
+        ret(c::futimens(borrowed_fd(fd), as_ptr(times).cast()))
+    }
+
+    // Apple version: `futimens` was introduced in macOS 10.13.
+    #[cfg(apple)]
+    unsafe {
+        use crate::utils::as_ptr;
+
+        // ABI details.
+        weak! {
+            fn futimens(c::c_int, *const c::timespec) -> c::c_int
+        }
+        extern "C" {
+            fn fsetattrlist(
+                fd: c::c_int,
+                attr_list: *const Attrlist,
+                attr_buf: *const c::c_void,
+                attr_buf_size: c::size_t,
+                options: c::c_ulong,
+            ) -> c::c_int;
+        }
+
+        // If we have `futimens`, use it.
+        if let Some(have_futimens) = futimens.get() {
+            return ret(have_futimens(borrowed_fd(fd), as_ptr(times).cast()));
+        }
+
+        // Otherwise use `fsetattrlist`.
+        let (attrbuf_size, times, attrs) = times_to_attrlist(times);
+
+        ret(fsetattrlist(
+            borrowed_fd(fd),
+            &attrs,
+            as_ptr(&times).cast(),
+            attrbuf_size,
+            0,
+        ))
+    }
+}
+
+#[cfg(fix_y2038)]
+fn futimens_old(fd: BorrowedFd<'_>, times: &Timestamps) -> io::Result<()> {
+    let old_times = [
+        c::timespec {
+            tv_sec: times
+                .last_access
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: times
+                .last_access
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+        },
+        c::timespec {
+            tv_sec: times
+                .last_modification
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: times
+                .last_modification
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+        },
+    ];
+
+    unsafe { ret(c::futimens(borrowed_fd(fd), old_times.as_ptr())) }
+}
+
+#[cfg(not(any(
+    apple,
+    netbsdlike,
+    solarish,
+    target_os = "aix",
+    target_os = "dragonfly",
+    target_os = "espidf",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+)))]
+pub(crate) fn fallocate(
+    fd: BorrowedFd<'_>,
+    mode: FallocateFlags,
+    offset: u64,
+    len: u64,
+) -> io::Result<()> {
+    // Silently cast; we'll get `EINVAL` if the value is negative.
+    let offset = offset as i64;
+    let len = len as i64;
+
+    #[cfg(any(linux_kernel, target_os = "fuchsia"))]
+    unsafe {
+        ret(c::fallocate(
+            borrowed_fd(fd),
+            bitflags_bits!(mode),
+            offset,
+            len,
+        ))
+    }
+
+    #[cfg(not(any(linux_kernel, target_os = "fuchsia")))]
+    {
+        assert!(mode.is_empty());
+        let err = unsafe { c::posix_fallocate(borrowed_fd(fd), offset, len) };
+
+        // `posix_fallocate` returns its error status rather than using
+        // `errno`.
+        if err == 0 {
+            Ok(())
+        } else {
+            Err(io::Errno(err))
+        }
+    }
+}
+
+#[cfg(apple)]
+pub(crate) fn fallocate(
+    fd: BorrowedFd<'_>,
+    mode: FallocateFlags,
+    offset: u64,
+    len: u64,
+) -> io::Result<()> {
+    let offset: i64 = offset.try_into().map_err(|_e| io::Errno::INVAL)?;
+    let len = len as i64;
+
+    assert!(mode.is_empty());
+
+    let new_len = offset.checked_add(len).ok_or(io::Errno::FBIG)?;
+    let mut store = c::fstore_t {
+        fst_flags: c::F_ALLOCATECONTIG,
+        fst_posmode: c::F_PEOFPOSMODE,
+        fst_offset: 0,
+        fst_length: new_len,
+        fst_bytesalloc: 0,
+    };
+    unsafe {
+        if c::fcntl(borrowed_fd(fd), c::F_PREALLOCATE, &store) == -1 {
+            // Unable to allocate contiguous disk space; attempt to allocate
+            // non-contiguously.
+            store.fst_flags = c::F_ALLOCATEALL;
+            let _ = ret_c_int(c::fcntl(borrowed_fd(fd), c::F_PREALLOCATE, &store))?;
+        }
+        ret(c::ftruncate(borrowed_fd(fd), new_len))
+    }
+}
+
+pub(crate) fn fsync(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(c::fsync(borrowed_fd(fd))) }
+}
+
+#[cfg(not(any(
+    apple,
+    target_os = "dragonfly",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "redox",
+    target_os = "vita",
+)))]
+pub(crate) fn fdatasync(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(c::fdatasync(borrowed_fd(fd))) }
+}
+
+pub(crate) fn ftruncate(fd: BorrowedFd<'_>, length: u64) -> io::Result<()> {
+    let length = length.try_into().map_err(|_overflow_err| io::Errno::FBIG)?;
+    unsafe { ret(c::ftruncate(borrowed_fd(fd), length)) }
+}
+
+#[cfg(any(linux_kernel, target_os = "freebsd"))]
+pub(crate) fn memfd_create(name: &CStr, flags: MemfdFlags) -> io::Result<OwnedFd> {
+    #[cfg(target_os = "freebsd")]
+    weakcall! {
+        fn memfd_create(
+            name: *const c::c_char,
+            flags: c::c_uint
+        ) -> c::c_int
+    }
+
+    #[cfg(linux_kernel)]
+    weak_or_syscall! {
+        fn memfd_create(
+            name: *const c::c_char,
+            flags: c::c_uint
+        ) via SYS_memfd_create -> c::c_int
+    }
+
+    unsafe { ret_owned_fd(memfd_create(c_str(name), bitflags_bits!(flags))) }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn openat2(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    oflags: OFlags,
+    mode: Mode,
+    resolve: ResolveFlags,
+) -> io::Result<OwnedFd> {
+    use linux_raw_sys::general::open_how;
+
+    syscall! {
+        fn openat2(
+            base_dirfd: c::c_int,
+            pathname: *const c::c_char,
+            how: *mut open_how,
+            size: usize
+        ) via SYS_OPENAT2 -> c::c_int
+    }
+
+    let oflags = oflags.bits();
+    let mut open_how = open_how {
+        flags: u64::from(oflags),
+        mode: u64::from(mode.bits()),
+        resolve: resolve.bits(),
+    };
+
+    unsafe {
+        ret_owned_fd(openat2(
+            borrowed_fd(dirfd),
+            c_str(path),
+            &mut open_how,
+            size_of::<open_how>(),
+        ))
+    }
+}
+#[cfg(all(linux_kernel, target_pointer_width = "32"))]
+const SYS_OPENAT2: i32 = 437;
+#[cfg(all(linux_kernel, target_pointer_width = "64"))]
+const SYS_OPENAT2: i64 = 437;
+
+#[cfg(target_os = "linux")]
+pub(crate) fn sendfile(
+    out_fd: BorrowedFd<'_>,
+    in_fd: BorrowedFd<'_>,
+    offset: Option<&mut u64>,
+    count: usize,
+) -> io::Result<usize> {
+    unsafe {
+        ret_usize(c::sendfile64(
+            borrowed_fd(out_fd),
+            borrowed_fd(in_fd),
+            offset.map_or(null_mut(), crate::utils::as_mut_ptr).cast(),
+            count,
+        ))
+    }
+}
+
+/// Convert from a Linux `statx` value to rustix's `Stat`.
+#[cfg(all(linux_kernel, target_pointer_width = "32"))]
+fn statx_to_stat(x: crate::fs::Statx) -> io::Result<Stat> {
+    Ok(Stat {
+        st_dev: crate::fs::makedev(x.stx_dev_major, x.stx_dev_minor).into(),
+        st_mode: x.stx_mode.into(),
+        st_nlink: x.stx_nlink.into(),
+        st_uid: x.stx_uid.into(),
+        st_gid: x.stx_gid.into(),
+        st_rdev: crate::fs::makedev(x.stx_rdev_major, x.stx_rdev_minor).into(),
+        st_size: x.stx_size.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_blksize: x.stx_blksize.into(),
+        st_blocks: x.stx_blocks.into(),
+        st_atime: x
+            .stx_atime
+            .tv_sec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_atime_nsec: x.stx_atime.tv_nsec as _,
+        st_mtime: x
+            .stx_mtime
+            .tv_sec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_mtime_nsec: x.stx_mtime.tv_nsec as _,
+        st_ctime: x
+            .stx_ctime
+            .tv_sec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_ctime_nsec: x.stx_ctime.tv_nsec as _,
+        st_ino: x.stx_ino.into(),
+    })
+}
+
+/// Convert from a Linux `statx` value to rustix's `Stat`.
+///
+/// mips64' `struct stat64` in libc has private fields, and `stx_blocks`
+#[cfg(all(linux_kernel, any(target_arch = "mips64", target_arch = "mips64r6")))]
+fn statx_to_stat(x: crate::fs::Statx) -> io::Result<Stat> {
+    let mut result: Stat = unsafe { core::mem::zeroed() };
+
+    result.st_dev = crate::fs::makedev(x.stx_dev_major, x.stx_dev_minor);
+    result.st_mode = x.stx_mode.into();
+    result.st_nlink = x.stx_nlink.into();
+    result.st_uid = x.stx_uid.into();
+    result.st_gid = x.stx_gid.into();
+    result.st_rdev = crate::fs::makedev(x.stx_rdev_major, x.stx_rdev_minor);
+    result.st_size = x.stx_size.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_blksize = x.stx_blksize.into();
+    result.st_blocks = x.stx_blocks.try_into().map_err(|_e| io::Errno::OVERFLOW)?;
+    result.st_atime = x
+        .stx_atime
+        .tv_sec
+        .try_into()
+        .map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_atime_nsec = x.stx_atime.tv_nsec as _;
+    result.st_mtime = x
+        .stx_mtime
+        .tv_sec
+        .try_into()
+        .map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_mtime_nsec = x.stx_mtime.tv_nsec as _;
+    result.st_ctime = x
+        .stx_ctime
+        .tv_sec
+        .try_into()
+        .map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_ctime_nsec = x.stx_ctime.tv_nsec as _;
+    result.st_ino = x.stx_ino.into();
+
+    Ok(result)
+}
+
+/// Convert from a Linux `stat64` value to rustix's `Stat`.
+#[cfg(all(linux_kernel, target_pointer_width = "32"))]
+fn stat64_to_stat(s64: c::stat64) -> io::Result<Stat> {
+    Ok(Stat {
+        st_dev: s64.st_dev.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_mode: s64.st_mode.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_nlink: s64.st_nlink.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_uid: s64.st_uid.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_gid: s64.st_gid.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_rdev: s64.st_rdev.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_size: s64.st_size.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_blksize: s64.st_blksize.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_blocks: s64.st_blocks.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_atime: s64.st_atime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_atime_nsec: s64
+            .st_atime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_mtime: s64.st_mtime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_mtime_nsec: s64
+            .st_mtime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_ctime: s64.st_ctime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_ctime_nsec: s64
+            .st_ctime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_ino: s64.st_ino.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+    })
+}
+
+/// Convert from a Linux `stat64` value to rustix's `Stat`.
+///
+/// mips64' `struct stat64` in libc has private fields, and `st_blocks` has
+/// type `i64`.
+#[cfg(all(linux_kernel, any(target_arch = "mips64", target_arch = "mips64r6")))]
+fn stat64_to_stat(s64: c::stat64) -> io::Result<Stat> {
+    let mut result: Stat = unsafe { core::mem::zeroed() };
+
+    result.st_dev = s64.st_dev.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_mode = s64.st_mode.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_nlink = s64.st_nlink.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_uid = s64.st_uid.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_gid = s64.st_gid.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_rdev = s64.st_rdev.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_size = s64.st_size.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_blksize = s64.st_blksize.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_blocks = s64.st_blocks.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_atime = s64.st_atime.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_atime_nsec = s64
+        .st_atime_nsec
+        .try_into()
+        .map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_mtime = s64.st_mtime.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_mtime_nsec = s64
+        .st_mtime_nsec
+        .try_into()
+        .map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_ctime = s64.st_ctime.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_ctime_nsec = s64
+        .st_ctime_nsec
+        .try_into()
+        .map_err(|_| io::Errno::OVERFLOW)?;
+    result.st_ino = s64.st_ino.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+
+    Ok(result)
+}
+
+#[cfg(linux_kernel)]
+#[allow(non_upper_case_globals)]
+mod sys {
+    use super::{c, BorrowedFd, Statx};
+
+    weak_or_syscall! {
+        pub(super) fn statx(
+            dirfd_: BorrowedFd<'_>,
+            path: *const c::c_char,
+            flags: c::c_int,
+            mask: c::c_uint,
+            buf: *mut Statx
+        ) via SYS_statx -> c::c_int
+    }
+}
+
+#[cfg(linux_kernel)]
+#[allow(non_upper_case_globals)]
+pub(crate) fn statx(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    flags: AtFlags,
+    mask: StatxFlags,
+) -> io::Result<Statx> {
+    // If a future Linux kernel adds more fields to `struct statx` and users
+    // passing flags unknown to rustix in `StatxFlags`, we could end up
+    // writing outside of the buffer. To prevent this possibility, we mask off
+    // any flags that we don't know about.
+    //
+    // This includes `STATX__RESERVED`, which has a value that we know, but
+    // which could take on arbitrary new meaning in the future. Linux currently
+    // rejects this flag with `EINVAL`, so we do the same.
+    //
+    // This doesn't rely on `STATX_ALL` because [it's deprecated] and already
+    // doesn't represent all the known flags.
+    //
+    // [it's deprecated]: https://patchwork.kernel.org/project/linux-fsdevel/patch/20200505095915.11275-7-mszeredi@redhat.com/
+    #[cfg(not(any(target_os = "android", target_env = "musl")))]
+    const STATX__RESERVED: u32 = c::STATX__RESERVED as u32;
+    #[cfg(any(target_os = "android", target_env = "musl"))]
+    const STATX__RESERVED: u32 = linux_raw_sys::general::STATX__RESERVED;
+    if (mask.bits() & STATX__RESERVED) == STATX__RESERVED {
+        return Err(io::Errno::INVAL);
+    }
+    let mask = mask & StatxFlags::all();
+
+    let mut statx_buf = MaybeUninit::<Statx>::uninit();
+    unsafe {
+        ret(sys::statx(
+            dirfd,
+            c_str(path),
+            bitflags_bits!(flags),
+            mask.bits(),
+            statx_buf.as_mut_ptr(),
+        ))?;
+        Ok(statx_buf.assume_init())
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn is_statx_available() -> bool {
+    unsafe {
+        // Call `statx` with null pointers so that if it fails for any reason
+        // other than `EFAULT`, we know it's not supported.
+        matches!(
+            ret(sys::statx(CWD, null(), 0, 0, null_mut())),
+            Err(io::Errno::FAULT)
+        )
+    }
+}
+
+#[cfg(apple)]
+pub(crate) unsafe fn fcopyfile(
+    from: BorrowedFd<'_>,
+    to: BorrowedFd<'_>,
+    state: copyfile_state_t,
+    flags: CopyfileFlags,
+) -> io::Result<()> {
+    extern "C" {
+        fn fcopyfile(
+            from: c::c_int,
+            to: c::c_int,
+            state: copyfile_state_t,
+            flags: c::c_uint,
+        ) -> c::c_int;
+    }
+
+    nonnegative_ret(fcopyfile(
+        borrowed_fd(from),
+        borrowed_fd(to),
+        state,
+        bitflags_bits!(flags),
+    ))
+}
+
+#[cfg(apple)]
+pub(crate) fn copyfile_state_alloc() -> io::Result<copyfile_state_t> {
+    extern "C" {
+        fn copyfile_state_alloc() -> copyfile_state_t;
+    }
+
+    let result = unsafe { copyfile_state_alloc() };
+    if result.0.is_null() {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(result)
+    }
+}
+
+#[cfg(apple)]
+pub(crate) unsafe fn copyfile_state_free(state: copyfile_state_t) -> io::Result<()> {
+    extern "C" {
+        fn copyfile_state_free(state: copyfile_state_t) -> c::c_int;
+    }
+
+    nonnegative_ret(copyfile_state_free(state))
+}
+
+#[cfg(apple)]
+const COPYFILE_STATE_COPIED: u32 = 8;
+
+#[cfg(apple)]
+pub(crate) unsafe fn copyfile_state_get_copied(state: copyfile_state_t) -> io::Result<u64> {
+    let mut copied = MaybeUninit::<u64>::uninit();
+    copyfile_state_get(state, COPYFILE_STATE_COPIED, copied.as_mut_ptr().cast())?;
+    Ok(copied.assume_init())
+}
+
+#[cfg(apple)]
+pub(crate) unsafe fn copyfile_state_get(
+    state: copyfile_state_t,
+    flag: u32,
+    dst: *mut c::c_void,
+) -> io::Result<()> {
+    extern "C" {
+        fn copyfile_state_get(state: copyfile_state_t, flag: u32, dst: *mut c::c_void) -> c::c_int;
+    }
+
+    nonnegative_ret(copyfile_state_get(state, flag, dst))
+}
+
+#[cfg(all(apple, feature = "alloc"))]
+pub(crate) fn getpath(fd: BorrowedFd<'_>) -> io::Result<CString> {
+    // The use of `PATH_MAX` is generally not encouraged, but it
+    // is inevitable in this case because macOS defines `fcntl` with
+    // `F_GETPATH` in terms of `MAXPATHLEN`, and there are no
+    // alternatives. If a better method is invented, it should be used
+    // instead.
+    let mut buf = vec![0; c::PATH_MAX as usize];
+
+    // From the [macOS `fcntl` manual page]:
+    // `F_GETPATH` - Get the path of the file descriptor `Fildes`. The argument
+    //               must be a buffer of size `MAXPATHLEN` or greater.
+    //
+    // [macOS `fcntl` manual page]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html
+    unsafe {
+        ret(c::fcntl(borrowed_fd(fd), c::F_GETPATH, buf.as_mut_ptr()))?;
+    }
+
+    let l = buf.iter().position(|&c| c == 0).unwrap();
+    buf.truncate(l);
+    buf.shrink_to_fit();
+
+    Ok(CString::new(buf).unwrap())
+}
+
+#[cfg(apple)]
+pub(crate) fn fcntl_rdadvise(fd: BorrowedFd<'_>, offset: u64, len: u64) -> io::Result<()> {
+    // From the [macOS `fcntl` manual page]:
+    // `F_RDADVISE` - Issue an advisory read async with no copy to user.
+    //
+    // The `F_RDADVISE` command operates on the following structure which holds
+    // information passed from the user to the system:
+    //
+    // ```c
+    // struct radvisory {
+    //      off_t   ra_offset;  /* offset into the file */
+    //      int     ra_count;   /* size of the read     */
+    // };
+    // ```
+    //
+    // [macOS `fcntl` manual page]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html
+    let ra_offset = match offset.try_into() {
+        Ok(len) => len,
+        // If this conversion fails, the user is providing an offset outside
+        // any possible file extent, so just ignore it.
+        Err(_) => return Ok(()),
+    };
+    let ra_count = match len.try_into() {
+        Ok(len) => len,
+        // If this conversion fails, the user is providing a dubiously large
+        // hint which is unlikely to improve performance.
+        Err(_) => return Ok(()),
+    };
+    unsafe {
+        let radvisory = c::radvisory {
+            ra_offset,
+            ra_count,
+        };
+        ret(c::fcntl(borrowed_fd(fd), c::F_RDADVISE, &radvisory))
+    }
+}
+
+#[cfg(apple)]
+pub(crate) fn fcntl_fullfsync(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(c::fcntl(borrowed_fd(fd), c::F_FULLFSYNC)) }
+}
+
+#[cfg(apple)]
+pub(crate) fn fcntl_nocache(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    unsafe { ret(c::fcntl(borrowed_fd(fd), c::F_NOCACHE, value as c::c_int)) }
+}
+
+#[cfg(apple)]
+pub(crate) fn fcntl_global_nocache(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    unsafe {
+        ret(c::fcntl(
+            borrowed_fd(fd),
+            c::F_GLOBAL_NOCACHE,
+            value as c::c_int,
+        ))
+    }
+}
+
+/// Convert `times` from a `futimens`/`utimensat` argument into `setattrlist`
+/// arguments.
+#[cfg(apple)]
+fn times_to_attrlist(times: &Timestamps) -> (c::size_t, [c::timespec; 2], Attrlist) {
+    // ABI details.
+    const ATTR_CMN_MODTIME: u32 = 0x0000_0400;
+    const ATTR_CMN_ACCTIME: u32 = 0x0000_1000;
+    const ATTR_BIT_MAP_COUNT: u16 = 5;
+
+    let mut times = times.clone();
+
+    // If we have any `UTIME_NOW` elements, replace them with the current time.
+    if times.last_access.tv_nsec == c::UTIME_NOW || times.last_modification.tv_nsec == c::UTIME_NOW
+    {
+        let now = {
+            let mut tv = c::timeval {
+                tv_sec: 0,
+                tv_usec: 0,
+            };
+            unsafe {
+                let r = c::gettimeofday(&mut tv, null_mut());
+                assert_eq!(r, 0);
+            }
+            c::timespec {
+                tv_sec: tv.tv_sec,
+                tv_nsec: (tv.tv_usec * 1000) as _,
+            }
+        };
+        if times.last_access.tv_nsec == c::UTIME_NOW {
+            times.last_access = now;
+        }
+        if times.last_modification.tv_nsec == c::UTIME_NOW {
+            times.last_modification = now;
+        }
+    }
+
+    // Pack the return values following the rules for [`getattrlist`].
+    //
+    // [`getattrlist`]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/getattrlist.2.html
+    let mut times_size = 0;
+    let mut attrs = Attrlist {
+        bitmapcount: ATTR_BIT_MAP_COUNT,
+        reserved: 0,
+        commonattr: 0,
+        volattr: 0,
+        dirattr: 0,
+        fileattr: 0,
+        forkattr: 0,
+    };
+    let mut return_times = [c::timespec {
+        tv_sec: 0,
+        tv_nsec: 0,
+    }; 2];
+    let mut times_index = 0;
+    if times.last_modification.tv_nsec != c::UTIME_OMIT {
+        attrs.commonattr |= ATTR_CMN_MODTIME;
+        return_times[times_index] = times.last_modification;
+        times_index += 1;
+        times_size += size_of::<c::timespec>();
+    }
+    if times.last_access.tv_nsec != c::UTIME_OMIT {
+        attrs.commonattr |= ATTR_CMN_ACCTIME;
+        return_times[times_index] = times.last_access;
+        times_size += size_of::<c::timespec>();
+    }
+
+    (times_size, return_times, attrs)
+}
+
+/// Support type for `Attrlist`.
+#[cfg(apple)]
+type Attrgroup = u32;
+
+/// Attribute list for use with `setattrlist`.
+#[cfg(apple)]
+#[repr(C)]
+struct Attrlist {
+    bitmapcount: u16,
+    reserved: u16,
+    commonattr: Attrgroup,
+    volattr: Attrgroup,
+    dirattr: Attrgroup,
+    fileattr: Attrgroup,
+    forkattr: Attrgroup,
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn getxattr(path: &CStr, name: &CStr, value: &mut [u8]) -> io::Result<usize> {
+    let value_ptr = value.as_mut_ptr();
+
+    #[cfg(not(apple))]
+    unsafe {
+        ret_usize(c::getxattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            value_ptr.cast::<c::c_void>(),
+            value.len(),
+        ))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret_usize(c::getxattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            value_ptr.cast::<c::c_void>(),
+            value.len(),
+            0,
+            0,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn lgetxattr(path: &CStr, name: &CStr, value: &mut [u8]) -> io::Result<usize> {
+    let value_ptr = value.as_mut_ptr();
+
+    #[cfg(not(apple))]
+    unsafe {
+        ret_usize(c::lgetxattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            value_ptr.cast::<c::c_void>(),
+            value.len(),
+        ))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret_usize(c::getxattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            value_ptr.cast::<c::c_void>(),
+            value.len(),
+            0,
+            c::XATTR_NOFOLLOW,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn fgetxattr(fd: BorrowedFd<'_>, name: &CStr, value: &mut [u8]) -> io::Result<usize> {
+    let value_ptr = value.as_mut_ptr();
+
+    #[cfg(not(apple))]
+    unsafe {
+        ret_usize(c::fgetxattr(
+            borrowed_fd(fd),
+            name.as_ptr(),
+            value_ptr.cast::<c::c_void>(),
+            value.len(),
+        ))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret_usize(c::fgetxattr(
+            borrowed_fd(fd),
+            name.as_ptr(),
+            value_ptr.cast::<c::c_void>(),
+            value.len(),
+            0,
+            0,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn setxattr(
+    path: &CStr,
+    name: &CStr,
+    value: &[u8],
+    flags: XattrFlags,
+) -> io::Result<()> {
+    #[cfg(not(apple))]
+    unsafe {
+        ret(c::setxattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            value.as_ptr().cast::<c::c_void>(),
+            value.len(),
+            flags.bits() as i32,
+        ))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret(c::setxattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            value.as_ptr().cast::<c::c_void>(),
+            value.len(),
+            0,
+            flags.bits() as i32,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn lsetxattr(
+    path: &CStr,
+    name: &CStr,
+    value: &[u8],
+    flags: XattrFlags,
+) -> io::Result<()> {
+    #[cfg(not(apple))]
+    unsafe {
+        ret(c::lsetxattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            value.as_ptr().cast::<c::c_void>(),
+            value.len(),
+            flags.bits() as i32,
+        ))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret(c::setxattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            value.as_ptr().cast::<c::c_void>(),
+            value.len(),
+            0,
+            flags.bits() as i32 | c::XATTR_NOFOLLOW,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn fsetxattr(
+    fd: BorrowedFd<'_>,
+    name: &CStr,
+    value: &[u8],
+    flags: XattrFlags,
+) -> io::Result<()> {
+    #[cfg(not(apple))]
+    unsafe {
+        ret(c::fsetxattr(
+            borrowed_fd(fd),
+            name.as_ptr(),
+            value.as_ptr().cast::<c::c_void>(),
+            value.len(),
+            flags.bits() as i32,
+        ))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret(c::fsetxattr(
+            borrowed_fd(fd),
+            name.as_ptr(),
+            value.as_ptr().cast::<c::c_void>(),
+            value.len(),
+            0,
+            flags.bits() as i32,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn listxattr(path: &CStr, list: &mut [c::c_char]) -> io::Result<usize> {
+    #[cfg(not(apple))]
+    unsafe {
+        ret_usize(c::listxattr(path.as_ptr(), list.as_mut_ptr(), list.len()))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret_usize(c::listxattr(
+            path.as_ptr(),
+            list.as_mut_ptr(),
+            list.len(),
+            0,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn llistxattr(path: &CStr, list: &mut [c::c_char]) -> io::Result<usize> {
+    #[cfg(not(apple))]
+    unsafe {
+        ret_usize(c::llistxattr(path.as_ptr(), list.as_mut_ptr(), list.len()))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret_usize(c::listxattr(
+            path.as_ptr(),
+            list.as_mut_ptr(),
+            list.len(),
+            c::XATTR_NOFOLLOW,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn flistxattr(fd: BorrowedFd<'_>, list: &mut [c::c_char]) -> io::Result<usize> {
+    let fd = borrowed_fd(fd);
+
+    #[cfg(not(apple))]
+    unsafe {
+        ret_usize(c::flistxattr(fd, list.as_mut_ptr(), list.len()))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret_usize(c::flistxattr(fd, list.as_mut_ptr(), list.len(), 0))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn removexattr(path: &CStr, name: &CStr) -> io::Result<()> {
+    #[cfg(not(apple))]
+    unsafe {
+        ret(c::removexattr(path.as_ptr(), name.as_ptr()))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret(c::removexattr(path.as_ptr(), name.as_ptr(), 0))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn lremovexattr(path: &CStr, name: &CStr) -> io::Result<()> {
+    #[cfg(not(apple))]
+    unsafe {
+        ret(c::lremovexattr(path.as_ptr(), name.as_ptr()))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret(c::removexattr(
+            path.as_ptr(),
+            name.as_ptr(),
+            c::XATTR_NOFOLLOW,
+        ))
+    }
+}
+
+#[cfg(any(apple, linux_kernel))]
+pub(crate) fn fremovexattr(fd: BorrowedFd<'_>, name: &CStr) -> io::Result<()> {
+    let fd = borrowed_fd(fd);
+
+    #[cfg(not(apple))]
+    unsafe {
+        ret(c::fremovexattr(fd, name.as_ptr()))
+    }
+
+    #[cfg(apple)]
+    unsafe {
+        ret(c::fremovexattr(fd, name.as_ptr(), 0))
+    }
+}
+
+#[test]
+fn test_sizes() {
+    #[cfg(linux_kernel)]
+    assert_eq_size!(c::loff_t, u64);
+
+    // Assert that `Timestamps` has the expected layout. If we're not fixing
+    // y2038, libc's type should match ours. If we are, it's smaller.
+    #[cfg(not(fix_y2038))]
+    assert_eq_size!([c::timespec; 2], Timestamps);
+    #[cfg(fix_y2038)]
+    assert!(core::mem::size_of::<[c::timespec; 2]>() < core::mem::size_of::<Timestamps>());
+}
diff --git a/vendor/rustix/src/backend/libc/fs/types.rs b/vendor/rustix/src/backend/libc/fs/types.rs
new file mode 100644
index 0000000..19508c2
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/fs/types.rs
@@ -0,0 +1,1164 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+#[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+bitflags! {
+    /// `*_OK` constants for use with [`accessat`].
+    ///
+    /// [`accessat`]: fn.accessat.html
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct Access: c::c_int {
+        /// `R_OK`
+        const READ_OK = c::R_OK;
+
+        /// `W_OK`
+        const WRITE_OK = c::W_OK;
+
+        /// `X_OK`
+        const EXEC_OK = c::X_OK;
+
+        /// `F_OK`
+        const EXISTS = c::F_OK;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "redox")))]
+bitflags! {
+    /// `AT_*` constants for use with [`openat`], [`statat`], and other `*at`
+    /// functions.
+    ///
+    /// [`openat`]: crate::fs::openat
+    /// [`statat`]: crate::fs::statat
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct AtFlags: u32 {
+        /// `AT_SYMLINK_NOFOLLOW`
+        const SYMLINK_NOFOLLOW = bitcast!(c::AT_SYMLINK_NOFOLLOW);
+
+        /// `AT_EACCESS`
+        #[cfg(not(any(target_os = "emscripten", target_os = "android")))]
+        const EACCESS = bitcast!(c::AT_EACCESS);
+
+        /// `AT_REMOVEDIR`
+        const REMOVEDIR = bitcast!(c::AT_REMOVEDIR);
+
+        /// `AT_SYMLINK_FOLLOW`
+        const SYMLINK_FOLLOW = bitcast!(c::AT_SYMLINK_FOLLOW);
+
+        /// `AT_NO_AUTOMOUNT`
+        #[cfg(any(linux_like, target_os = "fuchsia"))]
+        const NO_AUTOMOUNT = bitcast!(c::AT_NO_AUTOMOUNT);
+
+        /// `AT_EMPTY_PATH`
+        #[cfg(any(
+            linux_kernel,
+            target_os = "freebsd",
+            target_os = "fuchsia",
+        ))]
+        const EMPTY_PATH = bitcast!(c::AT_EMPTY_PATH);
+
+        /// `AT_RESOLVE_BENEATH`
+        #[cfg(target_os = "freebsd")]
+        const RESOLVE_BENEATH = bitcast!(c::AT_RESOLVE_BENEATH);
+
+        /// `AT_STATX_SYNC_AS_STAT`
+        #[cfg(all(target_os = "linux", target_env = "gnu"))]
+        const STATX_SYNC_AS_STAT = bitcast!(c::AT_STATX_SYNC_AS_STAT);
+
+        /// `AT_STATX_FORCE_SYNC`
+        #[cfg(all(target_os = "linux", target_env = "gnu"))]
+        const STATX_FORCE_SYNC = bitcast!(c::AT_STATX_FORCE_SYNC);
+
+        /// `AT_STATX_DONT_SYNC`
+        #[cfg(all(target_os = "linux", target_env = "gnu"))]
+        const STATX_DONT_SYNC = bitcast!(c::AT_STATX_DONT_SYNC);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `S_I*` constants for use with [`openat`], [`chmodat`], and [`fchmod`].
+    ///
+    /// [`openat`]: crate::fs::openat
+    /// [`chmodat`]: crate::fs::chmodat
+    /// [`fchmod`]: crate::fs::fchmod
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct Mode: RawMode {
+        /// `S_IRWXU`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const RWXU = c::S_IRWXU as RawMode;
+
+        /// `S_IRUSR`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const RUSR = c::S_IRUSR as RawMode;
+
+        /// `S_IWUSR`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const WUSR = c::S_IWUSR as RawMode;
+
+        /// `S_IXUSR`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const XUSR = c::S_IXUSR as RawMode;
+
+        /// `S_IRWXG`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const RWXG = c::S_IRWXG as RawMode;
+
+        /// `S_IRGRP`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const RGRP = c::S_IRGRP as RawMode;
+
+        /// `S_IWGRP`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const WGRP = c::S_IWGRP as RawMode;
+
+        /// `S_IXGRP`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const XGRP = c::S_IXGRP as RawMode;
+
+        /// `S_IRWXO`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const RWXO = c::S_IRWXO as RawMode;
+
+        /// `S_IROTH`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const ROTH = c::S_IROTH as RawMode;
+
+        /// `S_IWOTH`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const WOTH = c::S_IWOTH as RawMode;
+
+        /// `S_IXOTH`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const XOTH = c::S_IXOTH as RawMode;
+
+        /// `S_ISUID`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const SUID = c::S_ISUID as RawMode;
+
+        /// `S_ISGID`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const SGID = c::S_ISGID as RawMode;
+
+        /// `S_ISVTX`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const SVTX = c::S_ISVTX as RawMode;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(not(target_os = "espidf"))]
+impl Mode {
+    /// Construct a `Mode` from the mode bits of the `st_mode` field of a
+    /// `Mode`.
+    #[inline]
+    pub const fn from_raw_mode(st_mode: RawMode) -> Self {
+        Self::from_bits_truncate(st_mode)
+    }
+
+    /// Construct an `st_mode` value from a `Mode`.
+    #[inline]
+    pub const fn as_raw_mode(self) -> RawMode {
+        self.bits()
+    }
+}
+
+#[cfg(not(target_os = "espidf"))]
+impl From<RawMode> for Mode {
+    /// Support conversions from raw mode values to `Mode`.
+    ///
+    /// ```
+    /// use rustix::fs::{Mode, RawMode};
+    /// assert_eq!(Mode::from(0o700), Mode::RWXU);
+    /// ```
+    #[inline]
+    fn from(st_mode: RawMode) -> Self {
+        Self::from_raw_mode(st_mode)
+    }
+}
+
+#[cfg(not(target_os = "espidf"))]
+impl From<Mode> for RawMode {
+    /// Support conversions from `Mode` to raw mode values.
+    ///
+    /// ```
+    /// use rustix::fs::{Mode, RawMode};
+    /// assert_eq!(RawMode::from(Mode::RWXU), 0o700);
+    /// ```
+    #[inline]
+    fn from(mode: Mode) -> Self {
+        mode.as_raw_mode()
+    }
+}
+
+bitflags! {
+    /// `O_*` constants for use with [`openat`].
+    ///
+    /// [`openat`]: crate::fs::openat
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct OFlags: u32 {
+        /// `O_ACCMODE`
+        const ACCMODE = bitcast!(c::O_ACCMODE);
+
+        /// Similar to `ACCMODE`, but just includes the read/write flags, and
+        /// no other flags.
+        ///
+        /// On some platforms, `PATH` may be included in `ACCMODE`, when
+        /// sometimes we really just want the read/write bits. Caution is
+        /// indicated, as the presence of `PATH` may mean that the read/write
+        /// bits don't have their usual meaning.
+        const RWMODE = bitcast!(c::O_RDONLY | c::O_WRONLY | c::O_RDWR);
+
+        /// `O_APPEND`
+        const APPEND = bitcast!(c::O_APPEND);
+
+        /// `O_CREAT`
+        #[doc(alias = "CREAT")]
+        const CREATE = bitcast!(c::O_CREAT);
+
+        /// `O_DIRECTORY`
+        #[cfg(not(target_os = "espidf"))]
+        const DIRECTORY = bitcast!(c::O_DIRECTORY);
+
+        /// `O_DSYNC`
+        #[cfg(not(any(target_os = "dragonfly", target_os = "espidf", target_os = "l4re", target_os = "redox", target_os = "vita")))]
+        const DSYNC = bitcast!(c::O_DSYNC);
+
+        /// `O_EXCL`
+        const EXCL = bitcast!(c::O_EXCL);
+
+        /// `O_FSYNC`
+        #[cfg(any(
+            bsd,
+            all(target_os = "linux", not(target_env = "musl")),
+        ))]
+        const FSYNC = bitcast!(c::O_FSYNC);
+
+        /// `O_NOFOLLOW`
+        #[cfg(not(target_os = "espidf"))]
+        const NOFOLLOW = bitcast!(c::O_NOFOLLOW);
+
+        /// `O_NONBLOCK`
+        const NONBLOCK = bitcast!(c::O_NONBLOCK);
+
+        /// `O_RDONLY`
+        const RDONLY = bitcast!(c::O_RDONLY);
+
+        /// `O_WRONLY`
+        const WRONLY = bitcast!(c::O_WRONLY);
+
+        /// `O_RDWR`
+        ///
+        /// This is not equal to `RDONLY | WRONLY`. It's a distinct flag.
+        const RDWR = bitcast!(c::O_RDWR);
+
+        /// `O_NOCTTY`
+        #[cfg(not(any(target_os = "espidf", target_os = "l4re", target_os = "redox", target_os = "vita")))]
+        const NOCTTY = bitcast!(c::O_NOCTTY);
+
+        /// `O_RSYNC`
+        #[cfg(any(
+            linux_kernel,
+            netbsdlike,
+            target_os = "emscripten",
+            target_os = "wasi",
+        ))]
+        const RSYNC = bitcast!(c::O_RSYNC);
+
+        /// `O_SYNC`
+        #[cfg(not(any(target_os = "l4re", target_os = "redox")))]
+        const SYNC = bitcast!(c::O_SYNC);
+
+        /// `O_TRUNC`
+        const TRUNC = bitcast!(c::O_TRUNC);
+
+        /// `O_PATH`
+        #[cfg(any(
+            linux_kernel,
+            target_os = "emscripten",
+            target_os = "freebsd",
+            target_os = "fuchsia",
+            target_os = "redox",
+        ))]
+        const PATH = bitcast!(c::O_PATH);
+
+        /// `O_CLOEXEC`
+        const CLOEXEC = bitcast!(c::O_CLOEXEC);
+
+        /// `O_TMPFILE`
+        #[cfg(any(
+            linux_kernel,
+            target_os = "emscripten",
+            target_os = "fuchsia",
+        ))]
+        const TMPFILE = bitcast!(c::O_TMPFILE);
+
+        /// `O_NOATIME`
+        #[cfg(any(
+            linux_kernel,
+            target_os = "fuchsia",
+        ))]
+        const NOATIME = bitcast!(c::O_NOATIME);
+
+        /// `O_DIRECT`
+        #[cfg(any(
+            linux_kernel,
+            target_os = "emscripten",
+            target_os = "freebsd",
+            target_os = "fuchsia",
+            target_os = "netbsd",
+        ))]
+        const DIRECT = bitcast!(c::O_DIRECT);
+
+        /// `O_RESOLVE_BENEATH`
+        #[cfg(target_os = "freebsd")]
+        const RESOLVE_BENEATH = bitcast!(c::O_RESOLVE_BENEATH);
+
+        /// `O_EMPTY_PATH`
+        #[cfg(target_os = "freebsd")]
+        const EMPTY_PATH = bitcast!(c::O_EMPTY_PATH);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(apple)]
+bitflags! {
+    /// `CLONE_*` constants for use with [`fclonefileat`].
+    ///
+    /// [`fclonefileat`]: crate::fs::fclonefileat
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct CloneFlags: u32 {
+        /// `CLONE_NOFOLLOW`
+        const NOFOLLOW = 1;
+
+        /// `CLONE_NOOWNERCOPY`
+        const NOOWNERCOPY = 2;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(apple)]
+mod copyfile {
+    pub(super) const ACL: u32 = 1 << 0;
+    pub(super) const STAT: u32 = 1 << 1;
+    pub(super) const XATTR: u32 = 1 << 2;
+    pub(super) const DATA: u32 = 1 << 3;
+    pub(super) const SECURITY: u32 = STAT | ACL;
+    pub(super) const METADATA: u32 = SECURITY | XATTR;
+    pub(super) const ALL: u32 = METADATA | DATA;
+}
+
+#[cfg(apple)]
+bitflags! {
+    /// `COPYFILE_*` constants for use with [`fcopyfile`].
+    ///
+    /// [`fcopyfile`]: crate::fs::fcopyfile
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct CopyfileFlags: c::c_uint {
+        /// `COPYFILE_ACL`
+        const ACL = copyfile::ACL;
+
+        /// `COPYFILE_STAT`
+        const STAT = copyfile::STAT;
+
+        /// `COPYFILE_XATTR`
+        const XATTR = copyfile::XATTR;
+
+        /// `COPYFILE_DATA`
+        const DATA = copyfile::DATA;
+
+        /// `COPYFILE_SECURITY`
+        const SECURITY = copyfile::SECURITY;
+
+        /// `COPYFILE_METADATA`
+        const METADATA = copyfile::METADATA;
+
+        /// `COPYFILE_ALL`
+        const ALL = copyfile::ALL;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `RESOLVE_*` constants for use with [`openat2`].
+    ///
+    /// [`openat2`]: crate::fs::openat2
+    #[repr(transparent)]
+    #[derive(Default, Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct ResolveFlags: u64 {
+        /// `RESOLVE_NO_XDEV`
+        const NO_XDEV = 0x01;
+
+        /// `RESOLVE_NO_MAGICLINKS`
+        const NO_MAGICLINKS = 0x02;
+
+        /// `RESOLVE_NO_SYMLINKS`
+        const NO_SYMLINKS = 0x04;
+
+        /// `RESOLVE_BENEATH`
+        const BENEATH = 0x08;
+
+        /// `RESOLVE_IN_ROOT`
+        const IN_ROOT = 0x10;
+
+        /// `RESOLVE_CACHED` (since Linux 5.12)
+        const CACHED = 0x20;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `RENAME_*` constants for use with [`renameat_with`].
+    ///
+    /// [`renameat_with`]: crate::fs::renameat_with
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct RenameFlags: c::c_uint {
+        /// `RENAME_EXCHANGE`
+        const EXCHANGE = bitcast!(c::RENAME_EXCHANGE);
+
+        /// `RENAME_NOREPLACE`
+        const NOREPLACE = bitcast!(c::RENAME_NOREPLACE);
+
+        /// `RENAME_WHITEOUT`
+        const WHITEOUT = bitcast!(c::RENAME_WHITEOUT);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `S_IF*` constants for use with [`mknodat`] and [`Stat`]'s `st_mode` field.
+///
+/// [`mknodat`]: crate::fs::mknodat
+/// [`Stat`]: crate::fs::Stat
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum FileType {
+    /// `S_IFREG`
+    RegularFile = c::S_IFREG as isize,
+
+    /// `S_IFDIR`
+    Directory = c::S_IFDIR as isize,
+
+    /// `S_IFLNK`
+    Symlink = c::S_IFLNK as isize,
+
+    /// `S_IFIFO`
+    #[cfg(not(target_os = "wasi"))] // TODO: Use WASI's `S_IFIFO`.
+    #[doc(alias = "IFO")]
+    Fifo = c::S_IFIFO as isize,
+
+    /// `S_IFSOCK`
+    #[cfg(not(target_os = "wasi"))] // TODO: Use WASI's `S_IFSOCK`.
+    Socket = c::S_IFSOCK as isize,
+
+    /// `S_IFCHR`
+    CharacterDevice = c::S_IFCHR as isize,
+
+    /// `S_IFBLK`
+    BlockDevice = c::S_IFBLK as isize,
+
+    /// An unknown filesystem object.
+    Unknown,
+}
+
+impl FileType {
+    /// Construct a `FileType` from the `S_IFMT` bits of the `st_mode` field of
+    /// a `Stat`.
+    #[inline]
+    pub const fn from_raw_mode(st_mode: RawMode) -> Self {
+        match (st_mode as c::mode_t) & c::S_IFMT {
+            c::S_IFREG => Self::RegularFile,
+            c::S_IFDIR => Self::Directory,
+            c::S_IFLNK => Self::Symlink,
+            #[cfg(not(target_os = "wasi"))] // TODO: Use WASI's `S_IFIFO`.
+            c::S_IFIFO => Self::Fifo,
+            #[cfg(not(target_os = "wasi"))] // TODO: Use WASI's `S_IFSOCK`.
+            c::S_IFSOCK => Self::Socket,
+            c::S_IFCHR => Self::CharacterDevice,
+            c::S_IFBLK => Self::BlockDevice,
+            _ => Self::Unknown,
+        }
+    }
+
+    /// Construct an `st_mode` value from a `FileType`.
+    #[inline]
+    pub const fn as_raw_mode(self) -> RawMode {
+        match self {
+            Self::RegularFile => c::S_IFREG as RawMode,
+            Self::Directory => c::S_IFDIR as RawMode,
+            Self::Symlink => c::S_IFLNK as RawMode,
+            #[cfg(not(target_os = "wasi"))] // TODO: Use WASI's `S_IFIFO`.
+            Self::Fifo => c::S_IFIFO as RawMode,
+            #[cfg(not(target_os = "wasi"))] // TODO: Use WASI's `S_IFSOCK`.
+            Self::Socket => c::S_IFSOCK as RawMode,
+            Self::CharacterDevice => c::S_IFCHR as RawMode,
+            Self::BlockDevice => c::S_IFBLK as RawMode,
+            Self::Unknown => c::S_IFMT as RawMode,
+        }
+    }
+
+    /// Construct a `FileType` from the `d_type` field of a `c::dirent`.
+    #[cfg(not(any(
+        solarish,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "redox",
+        target_os = "vita"
+    )))]
+    #[inline]
+    pub(crate) const fn from_dirent_d_type(d_type: u8) -> Self {
+        match d_type {
+            c::DT_REG => Self::RegularFile,
+            c::DT_DIR => Self::Directory,
+            c::DT_LNK => Self::Symlink,
+            #[cfg(not(target_os = "wasi"))] // TODO: Use WASI's `DT_SOCK`.
+            c::DT_SOCK => Self::Socket,
+            #[cfg(not(target_os = "wasi"))] // TODO: Use WASI's `DT_FIFO`.
+            c::DT_FIFO => Self::Fifo,
+            c::DT_CHR => Self::CharacterDevice,
+            c::DT_BLK => Self::BlockDevice,
+            // c::DT_UNKNOWN |
+            _ => Self::Unknown,
+        }
+    }
+}
+
+/// `POSIX_FADV_*` constants for use with [`fadvise`].
+///
+/// [`fadvise`]: crate::fs::fadvise
+#[cfg(not(any(
+    apple,
+    netbsdlike,
+    solarish,
+    target_os = "dragonfly",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "redox",
+    target_os = "vita",
+)))]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+#[repr(u32)]
+pub enum Advice {
+    /// `POSIX_FADV_NORMAL`
+    Normal = c::POSIX_FADV_NORMAL as c::c_uint,
+
+    /// `POSIX_FADV_SEQUENTIAL`
+    Sequential = c::POSIX_FADV_SEQUENTIAL as c::c_uint,
+
+    /// `POSIX_FADV_RANDOM`
+    Random = c::POSIX_FADV_RANDOM as c::c_uint,
+
+    /// `POSIX_FADV_NOREUSE`
+    NoReuse = c::POSIX_FADV_NOREUSE as c::c_uint,
+
+    /// `POSIX_FADV_WILLNEED`
+    WillNeed = c::POSIX_FADV_WILLNEED as c::c_uint,
+
+    /// `POSIX_FADV_DONTNEED`
+    DontNeed = c::POSIX_FADV_DONTNEED as c::c_uint,
+}
+
+#[cfg(any(linux_kernel, target_os = "freebsd"))]
+bitflags! {
+    /// `MFD_*` constants for use with [`memfd_create`].
+    ///
+    /// [`memfd_create`]: crate::fs::memfd_create
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MemfdFlags: c::c_uint {
+        /// `MFD_CLOEXEC`
+        const CLOEXEC = c::MFD_CLOEXEC;
+
+        /// `MFD_ALLOW_SEALING`
+        const ALLOW_SEALING = c::MFD_ALLOW_SEALING;
+
+        /// `MFD_HUGETLB` (since Linux 4.14)
+        const HUGETLB = c::MFD_HUGETLB;
+
+        /// `MFD_HUGE_64KB`
+        const HUGE_64KB = c::MFD_HUGE_64KB;
+        /// `MFD_HUGE_512JB`
+        const HUGE_512KB = c::MFD_HUGE_512KB;
+        /// `MFD_HUGE_1MB`
+        const HUGE_1MB = c::MFD_HUGE_1MB;
+        /// `MFD_HUGE_2MB`
+        const HUGE_2MB = c::MFD_HUGE_2MB;
+        /// `MFD_HUGE_8MB`
+        const HUGE_8MB = c::MFD_HUGE_8MB;
+        /// `MFD_HUGE_16MB`
+        const HUGE_16MB = c::MFD_HUGE_16MB;
+        /// `MFD_HUGE_32MB`
+        const HUGE_32MB = c::MFD_HUGE_32MB;
+        /// `MFD_HUGE_256MB`
+        const HUGE_256MB = c::MFD_HUGE_256MB;
+        /// `MFD_HUGE_512MB`
+        const HUGE_512MB = c::MFD_HUGE_512MB;
+        /// `MFD_HUGE_1GB`
+        const HUGE_1GB = c::MFD_HUGE_1GB;
+        /// `MFD_HUGE_2GB`
+        const HUGE_2GB = c::MFD_HUGE_2GB;
+        /// `MFD_HUGE_16GB`
+        const HUGE_16GB = c::MFD_HUGE_16GB;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(any(linux_kernel, target_os = "freebsd", target_os = "fuchsia"))]
+bitflags! {
+    /// `F_SEAL_*` constants for use with [`fcntl_add_seals`] and
+    /// [`fcntl_get_seals`].
+    ///
+    /// [`fcntl_add_seals`]: crate::fs::fcntl_add_seals
+    /// [`fcntl_get_seals`]: crate::fs::fcntl_get_seals
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct SealFlags: u32 {
+        /// `F_SEAL_SEAL`
+        const SEAL = bitcast!(c::F_SEAL_SEAL);
+        /// `F_SEAL_SHRINK`
+        const SHRINK = bitcast!(c::F_SEAL_SHRINK);
+        /// `F_SEAL_GROW`
+        const GROW = bitcast!(c::F_SEAL_GROW);
+        /// `F_SEAL_WRITE`
+        const WRITE = bitcast!(c::F_SEAL_WRITE);
+        /// `F_SEAL_FUTURE_WRITE` (since Linux 5.1)
+        #[cfg(linux_kernel)]
+        const FUTURE_WRITE = bitcast!(c::F_SEAL_FUTURE_WRITE);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+bitflags! {
+    /// `STATX_*` constants for use with [`statx`].
+    ///
+    /// [`statx`]: crate::fs::statx
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct StatxFlags: u32 {
+        /// `STATX_TYPE`
+        const TYPE = c::STATX_TYPE;
+
+        /// `STATX_MODE`
+        const MODE = c::STATX_MODE;
+
+        /// `STATX_NLINK`
+        const NLINK = c::STATX_NLINK;
+
+        /// `STATX_UID`
+        const UID = c::STATX_UID;
+
+        /// `STATX_GID`
+        const GID = c::STATX_GID;
+
+        /// `STATX_ATIME`
+        const ATIME = c::STATX_ATIME;
+
+        /// `STATX_MTIME`
+        const MTIME = c::STATX_MTIME;
+
+        /// `STATX_CTIME`
+        const CTIME = c::STATX_CTIME;
+
+        /// `STATX_INO`
+        const INO = c::STATX_INO;
+
+        /// `STATX_SIZE`
+        const SIZE = c::STATX_SIZE;
+
+        /// `STATX_BLOCKS`
+        const BLOCKS = c::STATX_BLOCKS;
+
+        /// `STATX_BASIC_STATS`
+        const BASIC_STATS = c::STATX_BASIC_STATS;
+
+        /// `STATX_BTIME`
+        const BTIME = c::STATX_BTIME;
+
+        /// `STATX_MNT_ID` (since Linux 5.8)
+        const MNT_ID = c::STATX_MNT_ID;
+
+        /// `STATX_DIOALIGN` (since Linux 6.1)
+        const DIOALIGN = c::STATX_DIOALIGN;
+
+        /// `STATX_ALL`
+        const ALL = c::STATX_ALL;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(any(
+    target_os = "android",
+    all(target_os = "linux", not(target_env = "gnu")),
+))]
+bitflags! {
+    /// `STATX_*` constants for use with [`statx`].
+    ///
+    /// [`statx`]: crate::fs::statx
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct StatxFlags: u32 {
+        /// `STATX_TYPE`
+        const TYPE = 0x0001;
+
+        /// `STATX_MODE`
+        const MODE = 0x0002;
+
+        /// `STATX_NLINK`
+        const NLINK = 0x0004;
+
+        /// `STATX_UID`
+        const UID = 0x0008;
+
+        /// `STATX_GID`
+        const GID = 0x0010;
+
+        /// `STATX_ATIME`
+        const ATIME = 0x0020;
+
+        /// `STATX_MTIME`
+        const MTIME = 0x0040;
+
+        /// `STATX_CTIME`
+        const CTIME = 0x0080;
+
+        /// `STATX_INO`
+        const INO = 0x0100;
+
+        /// `STATX_SIZE`
+        const SIZE = 0x0200;
+
+        /// `STATX_BLOCKS`
+        const BLOCKS = 0x0400;
+
+        /// `STATX_BASIC_STATS`
+        const BASIC_STATS = 0x07ff;
+
+        /// `STATX_BTIME`
+        const BTIME = 0x800;
+
+        /// `STATX_MNT_ID` (since Linux 5.8)
+        const MNT_ID = 0x1000;
+
+        /// `STATX_ALL`
+        const ALL = 0xfff;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(not(any(
+    netbsdlike,
+    solarish,
+    target_os = "aix",
+    target_os = "espidf",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita"
+)))]
+bitflags! {
+    /// `FALLOC_FL_*` constants for use with [`fallocate`].
+    ///
+    /// [`fallocate`]: crate::fs::fallocate
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FallocateFlags: u32 {
+        /// `FALLOC_FL_KEEP_SIZE`
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "hurd",
+            target_os = "wasi",
+        )))]
+        const KEEP_SIZE = bitcast!(c::FALLOC_FL_KEEP_SIZE);
+        /// `FALLOC_FL_PUNCH_HOLE`
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "hurd",
+            target_os = "wasi",
+        )))]
+        const PUNCH_HOLE = bitcast!(c::FALLOC_FL_PUNCH_HOLE);
+        /// `FALLOC_FL_NO_HIDE_STALE`
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "emscripten",
+            target_os = "fuchsia",
+            target_os = "haiku",
+            target_os = "hurd",
+            target_os = "l4re",
+            target_os = "linux",
+            target_os = "wasi",
+        )))]
+        const NO_HIDE_STALE = bitcast!(c::FALLOC_FL_NO_HIDE_STALE);
+        /// `FALLOC_FL_COLLAPSE_RANGE`
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "hurd",
+            target_os = "emscripten",
+            target_os = "wasi",
+        )))]
+        const COLLAPSE_RANGE = bitcast!(c::FALLOC_FL_COLLAPSE_RANGE);
+        /// `FALLOC_FL_ZERO_RANGE`
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "hurd",
+            target_os = "emscripten",
+            target_os = "wasi",
+        )))]
+        const ZERO_RANGE = bitcast!(c::FALLOC_FL_ZERO_RANGE);
+        /// `FALLOC_FL_INSERT_RANGE`
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "hurd",
+            target_os = "emscripten",
+            target_os = "wasi",
+        )))]
+        const INSERT_RANGE = bitcast!(c::FALLOC_FL_INSERT_RANGE);
+        /// `FALLOC_FL_UNSHARE_RANGE`
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "hurd",
+            target_os = "emscripten",
+            target_os = "wasi",
+        )))]
+        const UNSHARE_RANGE = bitcast!(c::FALLOC_FL_UNSHARE_RANGE);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))]
+bitflags! {
+    /// `ST_*` constants for use with [`StatVfs`].
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct StatVfsMountFlags: u64 {
+        /// `ST_MANDLOCK`
+        #[cfg(any(linux_kernel, target_os = "emscripten", target_os = "fuchsia"))]
+        const MANDLOCK = c::ST_MANDLOCK as u64;
+
+        /// `ST_NOATIME`
+        #[cfg(any(linux_kernel, target_os = "emscripten", target_os = "fuchsia"))]
+        const NOATIME = c::ST_NOATIME as u64;
+
+        /// `ST_NODEV`
+        #[cfg(any(
+            linux_kernel,
+            target_os = "aix",
+            target_os = "emscripten",
+            target_os = "fuchsia"
+        ))]
+        const NODEV = c::ST_NODEV as u64;
+
+        /// `ST_NODIRATIME`
+        #[cfg(any(linux_kernel, target_os = "emscripten", target_os = "fuchsia"))]
+        const NODIRATIME = c::ST_NODIRATIME as u64;
+
+        /// `ST_NOEXEC`
+        #[cfg(any(linux_kernel, target_os = "emscripten", target_os = "fuchsia"))]
+        const NOEXEC = c::ST_NOEXEC as u64;
+
+        /// `ST_NOSUID`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const NOSUID = c::ST_NOSUID as u64;
+
+        /// `ST_RDONLY`
+        #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+        const RDONLY = c::ST_RDONLY as u64;
+
+        /// `ST_RELATIME`
+        #[cfg(any(target_os = "android", all(target_os = "linux", target_env = "gnu")))]
+        const RELATIME = c::ST_RELATIME as u64;
+
+        /// `ST_SYNCHRONOUS`
+        #[cfg(any(linux_kernel, target_os = "emscripten", target_os = "fuchsia"))]
+        const SYNCHRONOUS = c::ST_SYNCHRONOUS as u64;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `LOCK_*` constants for use with [`flock`] and [`fcntl_lock`].
+///
+/// [`flock`]: crate::fs::flock
+/// [`fcntl_lock`]: crate::fs::fcntl_lock
+#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[repr(u32)]
+pub enum FlockOperation {
+    /// `LOCK_SH`
+    LockShared = bitcast!(c::LOCK_SH),
+    /// `LOCK_EX`
+    LockExclusive = bitcast!(c::LOCK_EX),
+    /// `LOCK_UN`
+    Unlock = bitcast!(c::LOCK_UN),
+    /// `LOCK_SH | LOCK_NB`
+    NonBlockingLockShared = bitcast!(c::LOCK_SH | c::LOCK_NB),
+    /// `LOCK_EX | LOCK_NB`
+    NonBlockingLockExclusive = bitcast!(c::LOCK_EX | c::LOCK_NB),
+    /// `LOCK_UN | LOCK_NB`
+    NonBlockingUnlock = bitcast!(c::LOCK_UN | c::LOCK_NB),
+}
+
+/// `struct stat` for use with [`statat`] and [`fstat`].
+///
+/// [`statat`]: crate::fs::statat
+/// [`fstat`]: crate::fs::fstat
+#[cfg(not(any(linux_like, target_os = "hurd")))]
+pub type Stat = c::stat;
+
+/// `struct stat` for use with [`statat`] and [`fstat`].
+///
+/// [`statat`]: crate::fs::statat
+/// [`fstat`]: crate::fs::fstat
+#[cfg(any(
+    all(linux_kernel, target_pointer_width = "64"),
+    target_os = "hurd",
+    target_os = "emscripten",
+    target_os = "l4re",
+))]
+pub type Stat = c::stat64;
+
+/// `struct stat` for use with [`statat`] and [`fstat`].
+///
+/// [`statat`]: crate::fs::statat
+/// [`fstat`]: crate::fs::fstat
+// On 32-bit, Linux's `struct stat64` has a 32-bit `st_mtime` and friends, so
+// we use our own struct, populated from `statx` where possible, to avoid the
+// y2038 bug.
+#[cfg(all(linux_kernel, target_pointer_width = "32"))]
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+#[allow(missing_docs)]
+pub struct Stat {
+    pub st_dev: u64,
+    pub st_mode: u32,
+    pub st_nlink: u32,
+    pub st_uid: u32,
+    pub st_gid: u32,
+    pub st_rdev: u64,
+    pub st_size: i64,
+    pub st_blksize: u32,
+    pub st_blocks: u64,
+    pub st_atime: u64,
+    pub st_atime_nsec: u32,
+    pub st_mtime: u64,
+    pub st_mtime_nsec: u32,
+    pub st_ctime: u64,
+    pub st_ctime_nsec: u32,
+    pub st_ino: u64,
+}
+
+/// `struct statfs` for use with [`statfs`] and [`fstatfs`].
+///
+/// [`statfs`]: crate::fs::statfs
+/// [`fstatfs`]: crate::fs::fstatfs
+#[cfg(not(any(
+    linux_like,
+    solarish,
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "netbsd",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+#[allow(clippy::module_name_repetitions)]
+pub type StatFs = c::statfs;
+
+/// `struct statfs` for use with [`statfs`] and [`fstatfs`].
+///
+/// [`statfs`]: crate::fs::statfs
+/// [`fstatfs`]: crate::fs::fstatfs
+#[cfg(linux_like)]
+pub type StatFs = c::statfs64;
+
+/// `struct statvfs` for use with [`statvfs`] and [`fstatvfs`].
+///
+/// [`statvfs`]: crate::fs::statvfs
+/// [`fstatvfs`]: crate::fs::fstatvfs
+#[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))]
+#[allow(missing_docs)]
+pub struct StatVfs {
+    pub f_bsize: u64,
+    pub f_frsize: u64,
+    pub f_blocks: u64,
+    pub f_bfree: u64,
+    pub f_bavail: u64,
+    pub f_files: u64,
+    pub f_ffree: u64,
+    pub f_favail: u64,
+    pub f_fsid: u64,
+    pub f_flag: StatVfsMountFlags,
+    pub f_namemax: u64,
+}
+
+/// `struct statx` for use with [`statx`].
+///
+/// [`statx`]: crate::fs::statx
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+// Use the glibc `struct statx`.
+pub type Statx = c::statx;
+
+/// `struct statx_timestamp` for use with [`Statx`].
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+// Use the glibc `struct statx_timestamp`.
+pub type StatxTimestamp = c::statx;
+
+/// `struct statx` for use with [`statx`].
+///
+/// [`statx`]: crate::fs::statx
+// Non-glibc ABIs don't currently declare a `struct statx`, so we declare it
+// ourselves.
+#[cfg(any(
+    target_os = "android",
+    all(target_os = "linux", not(target_env = "gnu")),
+))]
+#[repr(C)]
+#[allow(missing_docs)]
+pub struct Statx {
+    pub stx_mask: u32,
+    pub stx_blksize: u32,
+    pub stx_attributes: u64,
+    pub stx_nlink: u32,
+    pub stx_uid: u32,
+    pub stx_gid: u32,
+    pub stx_mode: u16,
+    __statx_pad1: [u16; 1],
+    pub stx_ino: u64,
+    pub stx_size: u64,
+    pub stx_blocks: u64,
+    pub stx_attributes_mask: u64,
+    pub stx_atime: StatxTimestamp,
+    pub stx_btime: StatxTimestamp,
+    pub stx_ctime: StatxTimestamp,
+    pub stx_mtime: StatxTimestamp,
+    pub stx_rdev_major: u32,
+    pub stx_rdev_minor: u32,
+    pub stx_dev_major: u32,
+    pub stx_dev_minor: u32,
+    pub stx_mnt_id: u64,
+    __statx_pad2: u64,
+    __statx_pad3: [u64; 12],
+}
+
+/// `struct statx_timestamp` for use with [`Statx`].
+// Non-glibc ABIs don't currently declare a `struct statx_timestamp`, so we
+// declare it ourselves.
+#[cfg(any(
+    target_os = "android",
+    all(target_os = "linux", not(target_env = "gnu")),
+))]
+#[repr(C)]
+#[allow(missing_docs)]
+pub struct StatxTimestamp {
+    pub tv_sec: i64,
+    pub tv_nsec: u32,
+    pub __statx_timestamp_pad1: [i32; 1],
+}
+
+/// `mode_t`
+#[cfg(not(all(target_os = "android", target_pointer_width = "32")))]
+pub type RawMode = c::mode_t;
+
+/// `mode_t`
+#[cfg(all(target_os = "android", target_pointer_width = "32"))]
+pub type RawMode = c::c_uint;
+
+/// `dev_t`
+#[cfg(not(all(target_os = "android", target_pointer_width = "32")))]
+pub type Dev = c::dev_t;
+
+/// `dev_t`
+#[cfg(all(target_os = "android", target_pointer_width = "32"))]
+pub type Dev = c::c_ulonglong;
+
+/// `__fsword_t`
+#[cfg(all(
+    target_os = "linux",
+    not(target_env = "musl"),
+    not(target_arch = "s390x"),
+))]
+pub type FsWord = c::__fsword_t;
+
+/// `__fsword_t`
+#[cfg(all(
+    any(target_os = "android", all(target_os = "linux", target_env = "musl")),
+    target_pointer_width = "32",
+))]
+pub type FsWord = u32;
+
+/// `__fsword_t`
+#[cfg(all(
+    any(target_os = "android", all(target_os = "linux", target_env = "musl")),
+    not(target_arch = "s390x"),
+    target_pointer_width = "64",
+))]
+pub type FsWord = u64;
+
+/// `__fsword_t`
+// s390x uses `u32` for `statfs` entries on glibc, even though `__fsword_t` is
+// `u64`.
+#[cfg(all(target_os = "linux", target_arch = "s390x", target_env = "gnu"))]
+pub type FsWord = u32;
+
+/// `__fsword_t`
+// s390x uses `u64` for `statfs` entries on musl.
+#[cfg(all(target_os = "linux", target_arch = "s390x", target_env = "musl"))]
+pub type FsWord = u64;
+
+/// `copyfile_state_t`—State for use with [`fcopyfile`].
+///
+/// [`fcopyfile`]: crate::fs::fcopyfile
+#[cfg(apple)]
+#[allow(non_camel_case_types)]
+#[repr(transparent)]
+#[derive(Copy, Clone)]
+pub struct copyfile_state_t(pub(crate) *mut c::c_void);
diff --git a/vendor/rustix/src/backend/libc/io/errno.rs b/vendor/rustix/src/backend/libc/io/errno.rs
new file mode 100644
index 0000000..805ea67
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/io/errno.rs
@@ -0,0 +1,1052 @@
+//! The `rustix` `Errno` type.
+//!
+//! This type holds an OS error code, which conceptually corresponds to an
+//! `errno` value.
+
+use crate::backend::c;
+use libc_errno::errno;
+
+/// `errno`—An error code.
+///
+/// The error type for `rustix` APIs. This is similar to [`std::io::Error`],
+/// but only holds an OS error code, and no extra error value.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Winsock]
+///  - [FreeBSD]
+///  - [NetBSD]
+///  - [OpenBSD]
+///  - [DragonFly BSD]
+///  - [illumos]
+///  - [glibc]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/errno.html
+/// [Linux]: https://man7.org/linux/man-pages/man3/errno.3.html
+/// [Winsock]: https://learn.microsoft.com/en-us/windows/win32/winsock/windows-sockets-error-codes-2
+/// [FreeBSD]: https://man.freebsd.org/cgi/man.cgi?errno
+/// [NetBSD]: https://man.netbsd.org/errno.2
+/// [OpenBSD]: https://man.openbsd.org/errno.2
+/// [DragonFly BSD]: https://man.dragonflybsd.org/?command=errno&section=2
+/// [illumos]: https://illumos.org/man/3C/errno
+/// [glibc]: https://www.gnu.org/software/libc/manual/html_node/Error-Codes.html
+/// [`std::io::Error`]: Result
+#[repr(transparent)]
+#[doc(alias = "errno")]
+#[derive(Eq, PartialEq, Hash, Copy, Clone)]
+pub struct Errno(pub(crate) c::c_int);
+
+impl Errno {
+    /// `EACCES`
+    #[doc(alias = "ACCES")]
+    pub const ACCESS: Self = Self(c::EACCES);
+    /// `EADDRINUSE`
+    pub const ADDRINUSE: Self = Self(c::EADDRINUSE);
+    /// `EADDRNOTAVAIL`
+    pub const ADDRNOTAVAIL: Self = Self(c::EADDRNOTAVAIL);
+    /// `EADV`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const ADV: Self = Self(c::EADV);
+    /// `EAFNOSUPPORT`
+    #[cfg(not(target_os = "l4re"))]
+    pub const AFNOSUPPORT: Self = Self(c::EAFNOSUPPORT);
+    /// `EAGAIN`
+    pub const AGAIN: Self = Self(c::EAGAIN);
+    /// `EALREADY`
+    #[cfg(not(target_os = "l4re"))]
+    pub const ALREADY: Self = Self(c::EALREADY);
+    /// `EAUTH`
+    #[cfg(bsd)]
+    pub const AUTH: Self = Self(c::EAUTH);
+    /// `EBADE`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const BADE: Self = Self(c::EBADE);
+    /// `EBADF`
+    pub const BADF: Self = Self(c::EBADF);
+    /// `EBADFD`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const BADFD: Self = Self(c::EBADFD);
+    /// `EBADMSG`
+    #[cfg(not(any(windows, target_os = "l4re")))]
+    pub const BADMSG: Self = Self(c::EBADMSG);
+    /// `EBADR`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const BADR: Self = Self(c::EBADR);
+    /// `EBADRPC`
+    #[cfg(bsd)]
+    pub const BADRPC: Self = Self(c::EBADRPC);
+    /// `EBADRQC`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const BADRQC: Self = Self(c::EBADRQC);
+    /// `EBADSLT`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const BADSLT: Self = Self(c::EBADSLT);
+    /// `EBFONT`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const BFONT: Self = Self(c::EBFONT);
+    /// `EBUSY`
+    #[cfg(not(windows))]
+    pub const BUSY: Self = Self(c::EBUSY);
+    /// `ECANCELED`
+    #[cfg(not(target_os = "l4re"))]
+    pub const CANCELED: Self = Self(c::ECANCELED);
+    /// `ECAPMODE`
+    #[cfg(target_os = "freebsd")]
+    pub const CAPMODE: Self = Self(c::ECAPMODE);
+    /// `ECHILD`
+    #[cfg(not(windows))]
+    pub const CHILD: Self = Self(c::ECHILD);
+    /// `ECHRNG`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const CHRNG: Self = Self(c::ECHRNG);
+    /// `ECOMM`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const COMM: Self = Self(c::ECOMM);
+    /// `ECONNABORTED`
+    pub const CONNABORTED: Self = Self(c::ECONNABORTED);
+    /// `ECONNREFUSED`
+    pub const CONNREFUSED: Self = Self(c::ECONNREFUSED);
+    /// `ECONNRESET`
+    pub const CONNRESET: Self = Self(c::ECONNRESET);
+    /// `EDEADLK`
+    #[cfg(not(windows))]
+    pub const DEADLK: Self = Self(c::EDEADLK);
+    /// `EDEADLOCK`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "android",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const DEADLOCK: Self = Self(c::EDEADLOCK);
+    /// `EDESTADDRREQ`
+    #[cfg(not(target_os = "l4re"))]
+    pub const DESTADDRREQ: Self = Self(c::EDESTADDRREQ);
+    /// `EDISCON`
+    #[cfg(windows)]
+    pub const DISCON: Self = Self(c::EDISCON);
+    /// `EDOM`
+    #[cfg(not(windows))]
+    pub const DOM: Self = Self(c::EDOM);
+    /// `EDOOFUS`
+    #[cfg(freebsdlike)]
+    pub const DOOFUS: Self = Self(c::EDOOFUS);
+    /// `EDOTDOT`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const DOTDOT: Self = Self(c::EDOTDOT);
+    /// `EDQUOT`
+    pub const DQUOT: Self = Self(c::EDQUOT);
+    /// `EEXIST`
+    #[cfg(not(windows))]
+    pub const EXIST: Self = Self(c::EEXIST);
+    /// `EFAULT`
+    pub const FAULT: Self = Self(c::EFAULT);
+    /// `EFBIG`
+    #[cfg(not(windows))]
+    pub const FBIG: Self = Self(c::EFBIG);
+    /// `EFTYPE`
+    #[cfg(any(bsd, target_env = "newlib"))]
+    pub const FTYPE: Self = Self(c::EFTYPE);
+    /// `EHOSTDOWN`
+    #[cfg(not(any(target_os = "l4re", target_os = "wasi")))]
+    pub const HOSTDOWN: Self = Self(c::EHOSTDOWN);
+    /// `EHOSTUNREACH`
+    pub const HOSTUNREACH: Self = Self(c::EHOSTUNREACH);
+    /// `EHWPOISON`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "android",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "redox",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const HWPOISON: Self = Self(c::EHWPOISON);
+    /// `EIDRM`
+    #[cfg(not(any(windows, target_os = "l4re")))]
+    pub const IDRM: Self = Self(c::EIDRM);
+    /// `EILSEQ`
+    #[cfg(not(any(windows, target_os = "l4re")))]
+    pub const ILSEQ: Self = Self(c::EILSEQ);
+    /// `EINPROGRESS`
+    #[cfg(not(target_os = "l4re"))]
+    pub const INPROGRESS: Self = Self(c::EINPROGRESS);
+    /// `EINTR`
+    ///
+    /// For a convenient way to retry system calls that exit with `INTR`, use
+    /// [`retry_on_intr`].
+    ///
+    /// [`retry_on_intr`]: crate::io::retry_on_intr
+    pub const INTR: Self = Self(c::EINTR);
+    /// `EINVAL`
+    pub const INVAL: Self = Self(c::EINVAL);
+    /// `EINVALIDPROCTABLE`
+    #[cfg(windows)]
+    pub const INVALIDPROCTABLE: Self = Self(c::EINVALIDPROCTABLE);
+    /// `EINVALIDPROVIDER`
+    #[cfg(windows)]
+    pub const INVALIDPROVIDER: Self = Self(c::EINVALIDPROVIDER);
+    /// `EIO`
+    #[cfg(not(windows))]
+    pub const IO: Self = Self(c::EIO);
+    /// `EISCONN`
+    #[cfg(not(target_os = "l4re"))]
+    pub const ISCONN: Self = Self(c::EISCONN);
+    /// `EISDIR`
+    #[cfg(not(windows))]
+    pub const ISDIR: Self = Self(c::EISDIR);
+    /// `EISNAM`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const ISNAM: Self = Self(c::EISNAM);
+    /// `EKEYEXPIRED`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const KEYEXPIRED: Self = Self(c::EKEYEXPIRED);
+    /// `EKEYREJECTED`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const KEYREJECTED: Self = Self(c::EKEYREJECTED);
+    /// `EKEYREVOKED`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const KEYREVOKED: Self = Self(c::EKEYREVOKED);
+    /// `EL2HLT`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const L2HLT: Self = Self(c::EL2HLT);
+    /// `EL2NSYNC`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const L2NSYNC: Self = Self(c::EL2NSYNC);
+    /// `EL3HLT`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const L3HLT: Self = Self(c::EL3HLT);
+    /// `EL3RST`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const L3RST: Self = Self(c::EL3RST);
+    /// `ELIBACC`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const LIBACC: Self = Self(c::ELIBACC);
+    /// `ELIBBAD`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const LIBBAD: Self = Self(c::ELIBBAD);
+    /// `ELIBEXEC`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const LIBEXEC: Self = Self(c::ELIBEXEC);
+    /// `ELIBMAX`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const LIBMAX: Self = Self(c::ELIBMAX);
+    /// `ELIBSCN`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const LIBSCN: Self = Self(c::ELIBSCN);
+    /// `ELNRNG`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const LNRNG: Self = Self(c::ELNRNG);
+    /// `ELOOP`
+    pub const LOOP: Self = Self(c::ELOOP);
+    /// `EMEDIUMTYPE`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const MEDIUMTYPE: Self = Self(c::EMEDIUMTYPE);
+    /// `EMFILE`
+    pub const MFILE: Self = Self(c::EMFILE);
+    /// `EMLINK`
+    #[cfg(not(windows))]
+    pub const MLINK: Self = Self(c::EMLINK);
+    /// `EMSGSIZE`
+    #[cfg(not(target_os = "l4re"))]
+    pub const MSGSIZE: Self = Self(c::EMSGSIZE);
+    /// `EMULTIHOP`
+    #[cfg(not(any(windows, target_os = "l4re", target_os = "openbsd")))]
+    pub const MULTIHOP: Self = Self(c::EMULTIHOP);
+    /// `ENAMETOOLONG`
+    pub const NAMETOOLONG: Self = Self(c::ENAMETOOLONG);
+    /// `ENAVAIL`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const NAVAIL: Self = Self(c::ENAVAIL);
+    /// `ENEEDAUTH`
+    #[cfg(bsd)]
+    pub const NEEDAUTH: Self = Self(c::ENEEDAUTH);
+    /// `ENETDOWN`
+    pub const NETDOWN: Self = Self(c::ENETDOWN);
+    /// `ENETRESET`
+    #[cfg(not(target_os = "l4re"))]
+    pub const NETRESET: Self = Self(c::ENETRESET);
+    /// `ENETUNREACH`
+    pub const NETUNREACH: Self = Self(c::ENETUNREACH);
+    /// `ENFILE`
+    #[cfg(not(windows))]
+    pub const NFILE: Self = Self(c::ENFILE);
+    /// `ENOANO`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const NOANO: Self = Self(c::ENOANO);
+    /// `ENOATTR`
+    #[cfg(any(bsd, target_os = "haiku"))]
+    pub const NOATTR: Self = Self(c::ENOATTR);
+    /// `ENOBUFS`
+    #[cfg(not(target_os = "l4re"))]
+    pub const NOBUFS: Self = Self(c::ENOBUFS);
+    /// `ENOCSI`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const NOCSI: Self = Self(c::ENOCSI);
+    /// `ENODATA`
+    #[cfg(not(any(
+        freebsdlike,
+        windows,
+        target_os = "haiku",
+        target_os = "openbsd",
+        target_os = "wasi",
+    )))]
+    pub const NODATA: Self = Self(c::ENODATA);
+    /// `ENODEV`
+    #[cfg(not(windows))]
+    pub const NODEV: Self = Self(c::ENODEV);
+    /// `ENOENT`
+    #[cfg(not(windows))]
+    pub const NOENT: Self = Self(c::ENOENT);
+    /// `ENOEXEC`
+    #[cfg(not(windows))]
+    pub const NOEXEC: Self = Self(c::ENOEXEC);
+    /// `ENOKEY`
+    #[cfg(not(any(
+        solarish,
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const NOKEY: Self = Self(c::ENOKEY);
+    /// `ENOLCK`
+    #[cfg(not(any(windows, target_os = "l4re")))]
+    pub const NOLCK: Self = Self(c::ENOLCK);
+    /// `ENOLINK`
+    #[cfg(not(any(windows, target_os = "l4re", target_os = "openbsd")))]
+    pub const NOLINK: Self = Self(c::ENOLINK);
+    /// `ENOMEDIUM`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const NOMEDIUM: Self = Self(c::ENOMEDIUM);
+    /// `ENOMEM`
+    #[cfg(not(windows))]
+    pub const NOMEM: Self = Self(c::ENOMEM);
+    /// `ENOMORE`
+    #[cfg(windows)]
+    pub const NOMORE: Self = Self(c::ENOMORE);
+    /// `ENOMSG`
+    #[cfg(not(any(windows, target_os = "l4re")))]
+    pub const NOMSG: Self = Self(c::ENOMSG);
+    /// `ENONET`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const NONET: Self = Self(c::ENONET);
+    /// `ENOPKG`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const NOPKG: Self = Self(c::ENOPKG);
+    /// `ENOPROTOOPT`
+    #[cfg(not(target_os = "l4re"))]
+    pub const NOPROTOOPT: Self = Self(c::ENOPROTOOPT);
+    /// `ENOSPC`
+    #[cfg(not(windows))]
+    pub const NOSPC: Self = Self(c::ENOSPC);
+    /// `ENOSR`
+    #[cfg(not(any(
+        freebsdlike,
+        windows,
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "openbsd",
+        target_os = "wasi",
+    )))]
+    pub const NOSR: Self = Self(c::ENOSR);
+    /// `ENOSTR`
+    #[cfg(not(any(
+        freebsdlike,
+        windows,
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "openbsd",
+        target_os = "wasi",
+    )))]
+    pub const NOSTR: Self = Self(c::ENOSTR);
+    /// `ENOSYS`
+    #[cfg(not(windows))]
+    pub const NOSYS: Self = Self(c::ENOSYS);
+    /// `ENOTBLK`
+    #[cfg(not(any(
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const NOTBLK: Self = Self(c::ENOTBLK);
+    /// `ENOTCAPABLE`
+    #[cfg(any(target_os = "freebsd", target_os = "wasi"))]
+    pub const NOTCAPABLE: Self = Self(c::ENOTCAPABLE);
+    /// `ENOTCONN`
+    pub const NOTCONN: Self = Self(c::ENOTCONN);
+    /// `ENOTDIR`
+    #[cfg(not(windows))]
+    pub const NOTDIR: Self = Self(c::ENOTDIR);
+    /// `ENOTEMPTY`
+    pub const NOTEMPTY: Self = Self(c::ENOTEMPTY);
+    /// `ENOTNAM`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const NOTNAM: Self = Self(c::ENOTNAM);
+    /// `ENOTRECOVERABLE`
+    #[cfg(not(any(
+        freebsdlike,
+        netbsdlike,
+        windows,
+        target_os = "haiku",
+        target_os = "l4re"
+    )))]
+    pub const NOTRECOVERABLE: Self = Self(c::ENOTRECOVERABLE);
+    /// `ENOTSOCK`
+    #[cfg(not(target_os = "l4re"))]
+    pub const NOTSOCK: Self = Self(c::ENOTSOCK);
+    /// `ENOTSUP`
+    #[cfg(not(any(windows, target_os = "haiku", target_os = "redox")))]
+    pub const NOTSUP: Self = Self(c::ENOTSUP);
+    /// `ENOTTY`
+    #[cfg(not(windows))]
+    pub const NOTTY: Self = Self(c::ENOTTY);
+    /// `ENOTUNIQ`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const NOTUNIQ: Self = Self(c::ENOTUNIQ);
+    /// `ENXIO`
+    #[cfg(not(windows))]
+    pub const NXIO: Self = Self(c::ENXIO);
+    /// `EOPNOTSUPP`
+    pub const OPNOTSUPP: Self = Self(c::EOPNOTSUPP);
+    /// `EOVERFLOW`
+    #[cfg(not(any(windows, target_os = "l4re")))]
+    pub const OVERFLOW: Self = Self(c::EOVERFLOW);
+    /// `EOWNERDEAD`
+    #[cfg(not(any(
+        freebsdlike,
+        netbsdlike,
+        windows,
+        target_os = "haiku",
+        target_os = "l4re"
+    )))]
+    pub const OWNERDEAD: Self = Self(c::EOWNERDEAD);
+    /// `EPERM`
+    #[cfg(not(windows))]
+    pub const PERM: Self = Self(c::EPERM);
+    /// `EPFNOSUPPORT`
+    #[cfg(not(any(target_os = "l4re", target_os = "wasi")))]
+    pub const PFNOSUPPORT: Self = Self(c::EPFNOSUPPORT);
+    /// `EPIPE`
+    #[cfg(not(windows))]
+    pub const PIPE: Self = Self(c::EPIPE);
+    /// `EPROCLIM`
+    #[cfg(bsd)]
+    pub const PROCLIM: Self = Self(c::EPROCLIM);
+    /// `EPROCUNAVAIL`
+    #[cfg(bsd)]
+    pub const PROCUNAVAIL: Self = Self(c::EPROCUNAVAIL);
+    /// `EPROGMISMATCH`
+    #[cfg(bsd)]
+    pub const PROGMISMATCH: Self = Self(c::EPROGMISMATCH);
+    /// `EPROGUNAVAIL`
+    #[cfg(bsd)]
+    pub const PROGUNAVAIL: Self = Self(c::EPROGUNAVAIL);
+    /// `EPROTO`
+    #[cfg(not(any(windows, target_os = "l4re")))]
+    pub const PROTO: Self = Self(c::EPROTO);
+    /// `EPROTONOSUPPORT`
+    #[cfg(not(target_os = "l4re"))]
+    pub const PROTONOSUPPORT: Self = Self(c::EPROTONOSUPPORT);
+    /// `EPROTOTYPE`
+    #[cfg(not(target_os = "l4re"))]
+    pub const PROTOTYPE: Self = Self(c::EPROTOTYPE);
+    /// `EPROVIDERFAILEDINIT`
+    #[cfg(windows)]
+    pub const PROVIDERFAILEDINIT: Self = Self(c::EPROVIDERFAILEDINIT);
+    /// `ERANGE`
+    #[cfg(not(windows))]
+    pub const RANGE: Self = Self(c::ERANGE);
+    /// `EREFUSED`
+    #[cfg(windows)]
+    pub const REFUSED: Self = Self(c::EREFUSED);
+    /// `EREMCHG`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const REMCHG: Self = Self(c::EREMCHG);
+    /// `EREMOTE`
+    #[cfg(not(any(
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const REMOTE: Self = Self(c::EREMOTE);
+    /// `EREMOTEIO`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const REMOTEIO: Self = Self(c::EREMOTEIO);
+    /// `ERESTART`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const RESTART: Self = Self(c::ERESTART);
+    /// `ERFKILL`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "android",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "redox",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const RFKILL: Self = Self(c::ERFKILL);
+    /// `EROFS`
+    #[cfg(not(windows))]
+    pub const ROFS: Self = Self(c::EROFS);
+    /// `ERPCMISMATCH`
+    #[cfg(bsd)]
+    pub const RPCMISMATCH: Self = Self(c::ERPCMISMATCH);
+    /// `ESHUTDOWN`
+    #[cfg(not(any(
+        target_os = "espidf",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const SHUTDOWN: Self = Self(c::ESHUTDOWN);
+    /// `ESOCKTNOSUPPORT`
+    #[cfg(not(any(
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const SOCKTNOSUPPORT: Self = Self(c::ESOCKTNOSUPPORT);
+    /// `ESPIPE`
+    #[cfg(not(windows))]
+    pub const SPIPE: Self = Self(c::ESPIPE);
+    /// `ESRCH`
+    #[cfg(not(windows))]
+    pub const SRCH: Self = Self(c::ESRCH);
+    /// `ESRMNT`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const SRMNT: Self = Self(c::ESRMNT);
+    /// `ESTALE`
+    pub const STALE: Self = Self(c::ESTALE);
+    /// `ESTRPIPE`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const STRPIPE: Self = Self(c::ESTRPIPE);
+    /// `ETIME`
+    #[cfg(not(any(
+        freebsdlike,
+        windows,
+        target_os = "l4re",
+        target_os = "openbsd",
+        target_os = "wasi"
+    )))]
+    pub const TIME: Self = Self(c::ETIME);
+    /// `ETIMEDOUT`
+    pub const TIMEDOUT: Self = Self(c::ETIMEDOUT);
+    /// `E2BIG`
+    #[cfg(not(windows))]
+    #[doc(alias = "2BIG")]
+    pub const TOOBIG: Self = Self(c::E2BIG);
+    /// `ETOOMANYREFS`
+    #[cfg(not(any(target_os = "haiku", target_os = "l4re", target_os = "wasi")))]
+    pub const TOOMANYREFS: Self = Self(c::ETOOMANYREFS);
+    /// `ETXTBSY`
+    #[cfg(not(windows))]
+    pub const TXTBSY: Self = Self(c::ETXTBSY);
+    /// `EUCLEAN`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const UCLEAN: Self = Self(c::EUCLEAN);
+    /// `EUNATCH`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const UNATCH: Self = Self(c::EUNATCH);
+    /// `EUSERS`
+    #[cfg(not(any(
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi"
+    )))]
+    pub const USERS: Self = Self(c::EUSERS);
+    /// `EWOULDBLOCK`
+    pub const WOULDBLOCK: Self = Self(c::EWOULDBLOCK);
+    /// `EXDEV`
+    #[cfg(not(windows))]
+    pub const XDEV: Self = Self(c::EXDEV);
+    /// `EXFULL`
+    #[cfg(not(any(
+        bsd,
+        windows,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "vita",
+        target_os = "wasi",
+    )))]
+    pub const XFULL: Self = Self(c::EXFULL);
+}
+
+impl Errno {
+    /// Extract an `Errno` value from a `std::io::Error`.
+    ///
+    /// This isn't a `From` conversion because it's expected to be relatively
+    /// uncommon.
+    #[cfg(feature = "std")]
+    #[inline]
+    pub fn from_io_error(io_err: &std::io::Error) -> Option<Self> {
+        io_err
+            .raw_os_error()
+            .and_then(|raw| if raw != 0 { Some(Self(raw)) } else { None })
+    }
+
+    /// Extract the raw OS error number from this error.
+    #[inline]
+    pub const fn raw_os_error(self) -> i32 {
+        self.0
+    }
+
+    /// Construct an `Errno` from a raw OS error number.
+    #[inline]
+    pub const fn from_raw_os_error(raw: i32) -> Self {
+        Self(raw)
+    }
+
+    pub(crate) fn last_os_error() -> Self {
+        Self(errno().0)
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/io/mod.rs b/vendor/rustix/src/backend/libc/io/mod.rs
new file mode 100644
index 0000000..4873885
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/io/mod.rs
@@ -0,0 +1,6 @@
+pub(crate) mod errno;
+#[cfg(not(windows))]
+pub(crate) mod types;
+
+#[cfg_attr(windows, path = "windows_syscalls.rs")]
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/libc/io/syscalls.rs b/vendor/rustix/src/backend/libc/io/syscalls.rs
new file mode 100644
index 0000000..e28e6be
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/io/syscalls.rs
@@ -0,0 +1,340 @@
+//! libc syscalls supporting `rustix::io`.
+
+use crate::backend::c;
+#[cfg(not(target_os = "wasi"))]
+use crate::backend::conv::ret_discarded_fd;
+use crate::backend::conv::{borrowed_fd, ret, ret_c_int, ret_owned_fd, ret_usize};
+use crate::fd::{AsFd, BorrowedFd, OwnedFd, RawFd};
+#[cfg(not(any(
+    target_os = "aix",
+    target_os = "espidf",
+    target_os = "nto",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use crate::io::DupFlags;
+#[cfg(linux_kernel)]
+use crate::io::ReadWriteFlags;
+use crate::io::{self, FdFlags};
+use crate::ioctl::{IoctlOutput, RawOpcode};
+use core::cmp::min;
+#[cfg(all(feature = "fs", feature = "net"))]
+use libc_errno::errno;
+#[cfg(not(target_os = "espidf"))]
+use {
+    crate::backend::MAX_IOV,
+    crate::io::{IoSlice, IoSliceMut},
+};
+
+pub(crate) unsafe fn read(fd: BorrowedFd<'_>, buf: *mut u8, len: usize) -> io::Result<usize> {
+    ret_usize(c::read(borrowed_fd(fd), buf.cast(), min(len, READ_LIMIT)))
+}
+
+pub(crate) fn write(fd: BorrowedFd<'_>, buf: &[u8]) -> io::Result<usize> {
+    unsafe {
+        ret_usize(c::write(
+            borrowed_fd(fd),
+            buf.as_ptr().cast(),
+            min(buf.len(), READ_LIMIT),
+        ))
+    }
+}
+
+pub(crate) unsafe fn pread(
+    fd: BorrowedFd<'_>,
+    buf: *mut u8,
+    len: usize,
+    offset: u64,
+) -> io::Result<usize> {
+    let len = min(len, READ_LIMIT);
+
+    // Silently cast; we'll get `EINVAL` if the value is negative.
+    let offset = offset as i64;
+
+    // ESP-IDF and Vita don't support 64-bit offsets.
+    #[cfg(any(target_os = "espidf", target_os = "vita"))]
+    let offset: i32 = offset.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+
+    ret_usize(c::pread(borrowed_fd(fd), buf.cast(), len, offset))
+}
+
+pub(crate) fn pwrite(fd: BorrowedFd<'_>, buf: &[u8], offset: u64) -> io::Result<usize> {
+    let len = min(buf.len(), READ_LIMIT);
+
+    // Silently cast; we'll get `EINVAL` if the value is negative.
+    let offset = offset as i64;
+
+    // ESP-IDF and Vita don't support 64-bit offsets.
+    #[cfg(any(target_os = "espidf", target_os = "vita"))]
+    let offset: i32 = offset.try_into().map_err(|_| io::Errno::OVERFLOW)?;
+
+    unsafe { ret_usize(c::pwrite(borrowed_fd(fd), buf.as_ptr().cast(), len, offset)) }
+}
+
+#[cfg(not(target_os = "espidf"))]
+pub(crate) fn readv(fd: BorrowedFd<'_>, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+    unsafe {
+        ret_usize(c::readv(
+            borrowed_fd(fd),
+            bufs.as_ptr().cast::<c::iovec>(),
+            min(bufs.len(), MAX_IOV) as c::c_int,
+        ))
+    }
+}
+
+#[cfg(not(target_os = "espidf"))]
+pub(crate) fn writev(fd: BorrowedFd<'_>, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+    unsafe {
+        ret_usize(c::writev(
+            borrowed_fd(fd),
+            bufs.as_ptr().cast::<c::iovec>(),
+            min(bufs.len(), MAX_IOV) as c::c_int,
+        ))
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "solaris",
+    target_os = "vita"
+)))]
+pub(crate) fn preadv(
+    fd: BorrowedFd<'_>,
+    bufs: &mut [IoSliceMut<'_>],
+    offset: u64,
+) -> io::Result<usize> {
+    // Silently cast; we'll get `EINVAL` if the value is negative.
+    let offset = offset as i64;
+    unsafe {
+        ret_usize(c::preadv(
+            borrowed_fd(fd),
+            bufs.as_ptr().cast::<c::iovec>(),
+            min(bufs.len(), MAX_IOV) as c::c_int,
+            offset,
+        ))
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "solaris",
+    target_os = "vita"
+)))]
+pub(crate) fn pwritev(fd: BorrowedFd<'_>, bufs: &[IoSlice<'_>], offset: u64) -> io::Result<usize> {
+    // Silently cast; we'll get `EINVAL` if the value is negative.
+    let offset = offset as i64;
+    unsafe {
+        ret_usize(c::pwritev(
+            borrowed_fd(fd),
+            bufs.as_ptr().cast::<c::iovec>(),
+            min(bufs.len(), MAX_IOV) as c::c_int,
+            offset,
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn preadv2(
+    fd: BorrowedFd<'_>,
+    bufs: &mut [IoSliceMut<'_>],
+    offset: u64,
+    flags: ReadWriteFlags,
+) -> io::Result<usize> {
+    // Silently cast; we'll get `EINVAL` if the value is negative.
+    let offset = offset as i64;
+    unsafe {
+        ret_usize(c::preadv2(
+            borrowed_fd(fd),
+            bufs.as_ptr().cast::<c::iovec>(),
+            min(bufs.len(), MAX_IOV) as c::c_int,
+            offset,
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn pwritev2(
+    fd: BorrowedFd<'_>,
+    bufs: &[IoSlice<'_>],
+    offset: u64,
+    flags: ReadWriteFlags,
+) -> io::Result<usize> {
+    // Silently cast; we'll get `EINVAL` if the value is negative.
+    let offset = offset as i64;
+    unsafe {
+        ret_usize(c::pwritev2(
+            borrowed_fd(fd),
+            bufs.as_ptr().cast::<c::iovec>(),
+            min(bufs.len(), MAX_IOV) as c::c_int,
+            offset,
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+// These functions are derived from Rust's library/std/src/sys/unix/fd.rs at
+// revision 326ef470a8b379a180d6dc4bbef08990698a737a.
+
+// The maximum read limit on most POSIX-like systems is `SSIZE_MAX`, with the
+// manual page quoting that if the count of bytes to read is greater than
+// `SSIZE_MAX` the result is “unspecified”.
+//
+// On macOS, however, apparently the 64-bit libc is either buggy or
+// intentionally showing odd behavior by rejecting any read with a size larger
+// than or equal to `INT_MAX`. To handle both of these the read size is capped
+// on both platforms.
+#[cfg(target_os = "macos")]
+const READ_LIMIT: usize = c::c_int::MAX as usize - 1;
+#[cfg(not(target_os = "macos"))]
+const READ_LIMIT: usize = c::ssize_t::MAX as usize;
+
+pub(crate) unsafe fn close(raw_fd: RawFd) {
+    let _ = c::close(raw_fd as c::c_int);
+}
+
+#[inline]
+pub(crate) unsafe fn ioctl(
+    fd: BorrowedFd<'_>,
+    request: RawOpcode,
+    arg: *mut c::c_void,
+) -> io::Result<IoctlOutput> {
+    ret_c_int(c::ioctl(borrowed_fd(fd), request, arg))
+}
+
+#[inline]
+pub(crate) unsafe fn ioctl_readonly(
+    fd: BorrowedFd<'_>,
+    request: RawOpcode,
+    arg: *mut c::c_void,
+) -> io::Result<IoctlOutput> {
+    ioctl(fd, request, arg)
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+#[cfg(all(feature = "fs", feature = "net"))]
+pub(crate) fn is_read_write(fd: BorrowedFd<'_>) -> io::Result<(bool, bool)> {
+    use core::mem::MaybeUninit;
+
+    let (mut read, mut write) = crate::fs::fd::_is_file_read_write(fd)?;
+    let mut not_socket = false;
+    if read {
+        // Do a `recv` with `PEEK` and `DONTWAIT` for 1 byte. A 0 indicates
+        // the read side is shut down; an `EWOULDBLOCK` indicates the read
+        // side is still open.
+        match unsafe {
+            c::recv(
+                borrowed_fd(fd),
+                MaybeUninit::<[u8; 1]>::uninit()
+                    .as_mut_ptr()
+                    .cast::<c::c_void>(),
+                1,
+                c::MSG_PEEK | c::MSG_DONTWAIT,
+            )
+        } {
+            0 => read = false,
+            -1 => {
+                #[allow(unreachable_patterns)] // `EAGAIN` may equal `EWOULDBLOCK`
+                match errno().0 {
+                    c::EAGAIN | c::EWOULDBLOCK => (),
+                    c::ENOTSOCK => not_socket = true,
+                    err => return Err(io::Errno(err)),
+                }
+            }
+            _ => (),
+        }
+    }
+    if write && !not_socket {
+        // Do a `send` with `DONTWAIT` for 0 bytes. An `EPIPE` indicates
+        // the write side is shut down.
+        if unsafe { c::send(borrowed_fd(fd), [].as_ptr(), 0, c::MSG_DONTWAIT) } == -1 {
+            #[allow(unreachable_patterns)] // `EAGAIN` may equal `EWOULDBLOCK`
+            match errno().0 {
+                c::EAGAIN | c::EWOULDBLOCK | c::ENOTSOCK => (),
+                c::EPIPE => write = false,
+                err => return Err(io::Errno(err)),
+            }
+        }
+    }
+    Ok((read, write))
+}
+
+#[cfg(target_os = "wasi")]
+#[cfg(all(feature = "fs", feature = "net"))]
+pub(crate) fn is_read_write(_fd: BorrowedFd<'_>) -> io::Result<(bool, bool)> {
+    todo!("Implement is_read_write for WASI in terms of fd_fdstat_get");
+}
+
+pub(crate) fn fcntl_getfd(fd: BorrowedFd<'_>) -> io::Result<FdFlags> {
+    let flags = unsafe { ret_c_int(c::fcntl(borrowed_fd(fd), c::F_GETFD))? };
+    Ok(FdFlags::from_bits_retain(bitcast!(flags)))
+}
+
+pub(crate) fn fcntl_setfd(fd: BorrowedFd<'_>, flags: FdFlags) -> io::Result<()> {
+    unsafe { ret(c::fcntl(borrowed_fd(fd), c::F_SETFD, flags.bits())) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn fcntl_dupfd_cloexec(fd: BorrowedFd<'_>, min: RawFd) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(c::fcntl(borrowed_fd(fd), c::F_DUPFD_CLOEXEC, min)) }
+}
+
+#[cfg(target_os = "espidf")]
+pub(crate) fn fcntl_dupfd(fd: BorrowedFd<'_>, min: RawFd) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(c::fcntl(borrowed_fd(fd), c::F_DUPFD, min)) }
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn dup(fd: BorrowedFd<'_>) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(c::dup(borrowed_fd(fd))) }
+}
+
+#[allow(clippy::needless_pass_by_ref_mut)]
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn dup2(fd: BorrowedFd<'_>, new: &mut OwnedFd) -> io::Result<()> {
+    unsafe { ret_discarded_fd(c::dup2(borrowed_fd(fd), borrowed_fd(new.as_fd()))) }
+}
+
+#[allow(clippy::needless_pass_by_ref_mut)]
+#[cfg(not(any(
+    apple,
+    target_os = "aix",
+    target_os = "android",
+    target_os = "dragonfly",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+pub(crate) fn dup3(fd: BorrowedFd<'_>, new: &mut OwnedFd, flags: DupFlags) -> io::Result<()> {
+    unsafe {
+        ret_discarded_fd(c::dup3(
+            borrowed_fd(fd),
+            borrowed_fd(new.as_fd()),
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(any(
+    apple,
+    target_os = "android",
+    target_os = "dragonfly",
+    target_os = "haiku",
+    target_os = "redox",
+))]
+pub(crate) fn dup3(fd: BorrowedFd<'_>, new: &mut OwnedFd, _flags: DupFlags) -> io::Result<()> {
+    // Android 5.0 has `dup3`, but libc doesn't have bindings. Emulate it
+    // using `dup2`. We don't need to worry about the difference between
+    // `dup2` and `dup3` when the file descriptors are equal because we
+    // have an `&mut OwnedFd` which means `fd` doesn't alias it.
+    dup2(fd, new)
+}
diff --git a/vendor/rustix/src/backend/libc/io/types.rs b/vendor/rustix/src/backend/libc/io/types.rs
new file mode 100644
index 0000000..510206f
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/io/types.rs
@@ -0,0 +1,65 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `FD_*` constants for use with [`fcntl_getfd`] and [`fcntl_setfd`].
+    ///
+    /// [`fcntl_getfd`]: crate::io::fcntl_getfd
+    /// [`fcntl_setfd`]: crate::io::fcntl_setfd
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FdFlags: u32 {
+        /// `FD_CLOEXEC`
+        const CLOEXEC = bitcast!(c::FD_CLOEXEC);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `RWF_*` constants for use with [`preadv2`] and [`pwritev2`].
+    ///
+    /// [`preadv2`]: crate::io::preadv2
+    /// [`pwritev2`]: crate::io::pwritev
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct ReadWriteFlags: u32 {
+        /// `RWF_DSYNC` (since Linux 4.7)
+        const DSYNC = linux_raw_sys::general::RWF_DSYNC;
+        /// `RWF_HIPRI` (since Linux 4.6)
+        const HIPRI = linux_raw_sys::general::RWF_HIPRI;
+        /// `RWF_SYNC` (since Linux 4.7)
+        const SYNC = linux_raw_sys::general::RWF_SYNC;
+        /// `RWF_NOWAIT` (since Linux 4.14)
+        const NOWAIT = linux_raw_sys::general::RWF_NOWAIT;
+        /// `RWF_APPEND` (since Linux 4.16)
+        const APPEND = linux_raw_sys::general::RWF_APPEND;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+bitflags! {
+    /// `O_*` constants for use with [`dup2`].
+    ///
+    /// [`dup2`]: crate::io::dup2
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct DupFlags: u32 {
+        /// `O_CLOEXEC`
+        #[cfg(not(any(
+            apple,
+            target_os = "aix",
+            target_os = "android",
+            target_os = "redox",
+        )))] // Android 5.0 has dup3, but libc doesn't have bindings
+        const CLOEXEC = bitcast!(c::O_CLOEXEC);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/io/windows_syscalls.rs b/vendor/rustix/src/backend/libc/io/windows_syscalls.rs
new file mode 100644
index 0000000..049221d
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/io/windows_syscalls.rs
@@ -0,0 +1,30 @@
+//! Windows system calls in the `io` module.
+
+use crate::backend::c;
+use crate::backend::conv::{borrowed_fd, ret_c_int};
+use crate::backend::fd::LibcFd;
+use crate::fd::{BorrowedFd, RawFd};
+use crate::io;
+use crate::ioctl::{IoctlOutput, RawOpcode};
+
+pub(crate) unsafe fn close(raw_fd: RawFd) {
+    let _ = c::close(raw_fd as LibcFd);
+}
+
+#[inline]
+pub(crate) unsafe fn ioctl(
+    fd: BorrowedFd<'_>,
+    request: RawOpcode,
+    arg: *mut c::c_void,
+) -> io::Result<IoctlOutput> {
+    ret_c_int(c::ioctl(borrowed_fd(fd), request, arg.cast()))
+}
+
+#[inline]
+pub(crate) unsafe fn ioctl_readonly(
+    fd: BorrowedFd<'_>,
+    request: RawOpcode,
+    arg: *mut c::c_void,
+) -> io::Result<IoctlOutput> {
+    ioctl(fd, request, arg)
+}
diff --git a/vendor/rustix/src/backend/libc/io_uring/mod.rs b/vendor/rustix/src/backend/libc/io_uring/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/io_uring/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/libc/io_uring/syscalls.rs b/vendor/rustix/src/backend/libc/io_uring/syscalls.rs
new file mode 100644
index 0000000..8e81824
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/io_uring/syscalls.rs
@@ -0,0 +1,70 @@
+//! libc syscalls supporting `rustix::io_uring`.
+
+use crate::backend::c;
+use crate::backend::conv::{borrowed_fd, ret_owned_fd, ret_u32};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io;
+use crate::io_uring::{io_uring_params, IoringEnterFlags, IoringRegisterOp};
+
+#[inline]
+pub(crate) fn io_uring_setup(entries: u32, params: &mut io_uring_params) -> io::Result<OwnedFd> {
+    syscall! {
+        fn io_uring_setup(
+            entries: u32,
+            params: *mut io_uring_params
+        ) via SYS_io_uring_setup -> c::c_int
+    }
+    unsafe { ret_owned_fd(io_uring_setup(entries, params)) }
+}
+
+#[inline]
+pub(crate) unsafe fn io_uring_register(
+    fd: BorrowedFd<'_>,
+    opcode: IoringRegisterOp,
+    arg: *const c::c_void,
+    nr_args: u32,
+) -> io::Result<u32> {
+    syscall! {
+        fn io_uring_register(
+            fd: c::c_uint,
+            opcode: c::c_uint,
+            arg: *const c::c_void,
+            nr_args: c::c_uint
+        ) via SYS_io_uring_register -> c::c_int
+    }
+    ret_u32(io_uring_register(
+        borrowed_fd(fd) as _,
+        opcode as u32,
+        arg,
+        nr_args,
+    ))
+}
+
+#[inline]
+pub(crate) unsafe fn io_uring_enter(
+    fd: BorrowedFd<'_>,
+    to_submit: u32,
+    min_complete: u32,
+    flags: IoringEnterFlags,
+    arg: *const c::c_void,
+    size: usize,
+) -> io::Result<u32> {
+    syscall! {
+        fn io_uring_enter2(
+            fd: c::c_uint,
+            to_submit: c::c_uint,
+            min_complete: c::c_uint,
+            flags: c::c_uint,
+            arg: *const c::c_void,
+            size: usize
+        ) via SYS_io_uring_enter -> c::c_int
+    }
+    ret_u32(io_uring_enter2(
+        borrowed_fd(fd) as _,
+        to_submit,
+        min_complete,
+        bitflags_bits!(flags),
+        arg,
+        size,
+    ))
+}
diff --git a/vendor/rustix/src/backend/libc/mm/mod.rs b/vendor/rustix/src/backend/libc/mm/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/mm/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/libc/mm/syscalls.rs b/vendor/rustix/src/backend/libc/mm/syscalls.rs
new file mode 100644
index 0000000..33bc9ca
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/mm/syscalls.rs
@@ -0,0 +1,244 @@
+//! libc syscalls supporting `rustix::mm`.
+
+#[cfg(not(target_os = "redox"))]
+use super::types::Advice;
+#[cfg(any(linux_kernel, freebsdlike, netbsdlike))]
+use super::types::MlockAllFlags;
+#[cfg(any(target_os = "emscripten", target_os = "linux"))]
+use super::types::MremapFlags;
+use super::types::{MapFlags, MprotectFlags, MsyncFlags, ProtFlags};
+#[cfg(linux_kernel)]
+use super::types::{MlockFlags, UserfaultfdFlags};
+use crate::backend::c;
+#[cfg(linux_kernel)]
+use crate::backend::conv::ret_owned_fd;
+use crate::backend::conv::{borrowed_fd, no_fd, ret};
+use crate::fd::BorrowedFd;
+#[cfg(linux_kernel)]
+use crate::fd::OwnedFd;
+use crate::io;
+
+#[cfg(not(target_os = "redox"))]
+pub(crate) fn madvise(addr: *mut c::c_void, len: usize, advice: Advice) -> io::Result<()> {
+    // On Linux platforms, `MADV_DONTNEED` has the same value as
+    // `POSIX_MADV_DONTNEED` but different behavior. We remap it to a different
+    // value, and check for it here.
+    #[cfg(target_os = "linux")]
+    if let Advice::LinuxDontNeed = advice {
+        return unsafe { ret(c::madvise(addr, len, c::MADV_DONTNEED)) };
+    }
+
+    #[cfg(not(target_os = "android"))]
+    {
+        let err = unsafe { c::posix_madvise(addr, len, advice as c::c_int) };
+
+        // `posix_madvise` returns its error status rather than using `errno`.
+        if err == 0 {
+            Ok(())
+        } else {
+            Err(io::Errno(err))
+        }
+    }
+
+    #[cfg(target_os = "android")]
+    {
+        if let Advice::DontNeed = advice {
+            // Do nothing. Linux's `MADV_DONTNEED` isn't the same as
+            // `POSIX_MADV_DONTNEED`, so just discard `MADV_DONTNEED`.
+            Ok(())
+        } else {
+            unsafe { ret(c::madvise(addr, len, advice as c::c_int)) }
+        }
+    }
+}
+
+pub(crate) unsafe fn msync(addr: *mut c::c_void, len: usize, flags: MsyncFlags) -> io::Result<()> {
+    let err = c::msync(addr, len, bitflags_bits!(flags));
+
+    // `msync` returns its error status rather than using `errno`.
+    if err == 0 {
+        Ok(())
+    } else {
+        Err(io::Errno(err))
+    }
+}
+
+/// # Safety
+///
+/// `mmap` is primarily unsafe due to the `addr` parameter, as anything working
+/// with memory pointed to by raw pointers is unsafe.
+pub(crate) unsafe fn mmap(
+    ptr: *mut c::c_void,
+    len: usize,
+    prot: ProtFlags,
+    flags: MapFlags,
+    fd: BorrowedFd<'_>,
+    offset: u64,
+) -> io::Result<*mut c::c_void> {
+    let res = c::mmap(
+        ptr,
+        len,
+        bitflags_bits!(prot),
+        bitflags_bits!(flags),
+        borrowed_fd(fd),
+        offset as i64,
+    );
+    if res == c::MAP_FAILED {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(res)
+    }
+}
+
+/// # Safety
+///
+/// `mmap` is primarily unsafe due to the `addr` parameter, as anything working
+/// with memory pointed to by raw pointers is unsafe.
+pub(crate) unsafe fn mmap_anonymous(
+    ptr: *mut c::c_void,
+    len: usize,
+    prot: ProtFlags,
+    flags: MapFlags,
+) -> io::Result<*mut c::c_void> {
+    let res = c::mmap(
+        ptr,
+        len,
+        bitflags_bits!(prot),
+        bitflags_bits!(flags | MapFlags::from_bits_retain(bitcast!(c::MAP_ANONYMOUS))),
+        no_fd(),
+        0,
+    );
+    if res == c::MAP_FAILED {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(res)
+    }
+}
+
+pub(crate) unsafe fn mprotect(
+    ptr: *mut c::c_void,
+    len: usize,
+    flags: MprotectFlags,
+) -> io::Result<()> {
+    ret(c::mprotect(ptr, len, bitflags_bits!(flags)))
+}
+
+pub(crate) unsafe fn munmap(ptr: *mut c::c_void, len: usize) -> io::Result<()> {
+    ret(c::munmap(ptr, len))
+}
+
+/// # Safety
+///
+/// `mremap` is primarily unsafe due to the `old_address` parameter, as
+/// anything working with memory pointed to by raw pointers is unsafe.
+#[cfg(any(target_os = "emscripten", target_os = "linux"))]
+pub(crate) unsafe fn mremap(
+    old_address: *mut c::c_void,
+    old_size: usize,
+    new_size: usize,
+    flags: MremapFlags,
+) -> io::Result<*mut c::c_void> {
+    let res = c::mremap(old_address, old_size, new_size, bitflags_bits!(flags));
+    if res == c::MAP_FAILED {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(res)
+    }
+}
+
+/// # Safety
+///
+/// `mremap_fixed` is primarily unsafe due to the `old_address` and
+/// `new_address` parameters, as anything working with memory pointed to by raw
+/// pointers is unsafe.
+#[cfg(any(target_os = "emscripten", target_os = "linux"))]
+pub(crate) unsafe fn mremap_fixed(
+    old_address: *mut c::c_void,
+    old_size: usize,
+    new_size: usize,
+    flags: MremapFlags,
+    new_address: *mut c::c_void,
+) -> io::Result<*mut c::c_void> {
+    let res = c::mremap(
+        old_address,
+        old_size,
+        new_size,
+        bitflags_bits!(flags | MremapFlags::from_bits_retain(bitcast!(c::MAP_FIXED))),
+        new_address,
+    );
+    if res == c::MAP_FAILED {
+        Err(io::Errno::last_os_error())
+    } else {
+        Ok(res)
+    }
+}
+
+/// # Safety
+///
+/// `mlock` operates on raw pointers and may round out to the nearest page
+/// boundaries.
+#[inline]
+pub(crate) unsafe fn mlock(addr: *mut c::c_void, length: usize) -> io::Result<()> {
+    ret(c::mlock(addr, length))
+}
+
+/// # Safety
+///
+/// `mlock_with` operates on raw pointers and may round out to the nearest page
+/// boundaries.
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) unsafe fn mlock_with(
+    addr: *mut c::c_void,
+    length: usize,
+    flags: MlockFlags,
+) -> io::Result<()> {
+    weak_or_syscall! {
+        fn mlock2(
+            addr: *const c::c_void,
+            len: c::size_t,
+            flags: c::c_int
+        ) via SYS_mlock2 -> c::c_int
+    }
+
+    ret(mlock2(addr, length, bitflags_bits!(flags)))
+}
+
+/// # Safety
+///
+/// `munlock` operates on raw pointers and may round out to the nearest page
+/// boundaries.
+#[inline]
+pub(crate) unsafe fn munlock(addr: *mut c::c_void, length: usize) -> io::Result<()> {
+    ret(c::munlock(addr, length))
+}
+
+#[cfg(linux_kernel)]
+pub(crate) unsafe fn userfaultfd(flags: UserfaultfdFlags) -> io::Result<OwnedFd> {
+    syscall! {
+        fn userfaultfd(
+            flags: c::c_int
+        ) via SYS_userfaultfd -> c::c_int
+    }
+    ret_owned_fd(userfaultfd(bitflags_bits!(flags)))
+}
+
+/// Locks all pages mapped into the address space of the calling process.
+///
+/// This includes the pages of the code, data, and stack segment, as well as
+/// shared libraries, user space kernel data, shared memory, and memory-mapped
+/// files. All mapped pages are guaranteed to be resident in RAM when the call
+/// returns successfully; the pages are guaranteed to stay in RAM until later
+/// unlocked.
+#[inline]
+#[cfg(any(linux_kernel, freebsdlike, netbsdlike))]
+pub(crate) fn mlockall(flags: MlockAllFlags) -> io::Result<()> {
+    unsafe { ret(c::mlockall(bitflags_bits!(flags))) }
+}
+
+/// Unlocks all pages mapped into the address space of the calling process.
+#[inline]
+#[cfg(any(linux_kernel, freebsdlike, netbsdlike))]
+pub(crate) fn munlockall() -> io::Result<()> {
+    unsafe { ret(c::munlockall()) }
+}
diff --git a/vendor/rustix/src/backend/libc/mm/types.rs b/vendor/rustix/src/backend/libc/mm/types.rs
new file mode 100644
index 0000000..a4aa3e2
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/mm/types.rs
@@ -0,0 +1,477 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `PROT_*` flags for use with [`mmap`].
+    ///
+    /// For `PROT_NONE`, use `ProtFlags::empty()`.
+    ///
+    /// [`mmap`]: crate::mm::mmap
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct ProtFlags: u32 {
+        /// `PROT_READ`
+        const READ = bitcast!(c::PROT_READ);
+        /// `PROT_WRITE`
+        const WRITE = bitcast!(c::PROT_WRITE);
+        /// `PROT_EXEC`
+        const EXEC = bitcast!(c::PROT_EXEC);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `PROT_*` flags for use with [`mprotect`].
+    ///
+    /// For `PROT_NONE`, use `MprotectFlags::empty()`.
+    ///
+    /// [`mprotect`]: crate::mm::mprotect
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MprotectFlags: u32 {
+        /// `PROT_READ`
+        const READ = bitcast!(c::PROT_READ);
+        /// `PROT_WRITE`
+        const WRITE = bitcast!(c::PROT_WRITE);
+        /// `PROT_EXEC`
+        const EXEC = bitcast!(c::PROT_EXEC);
+        /// `PROT_GROWSUP`
+        #[cfg(linux_kernel)]
+        const GROWSUP = bitcast!(c::PROT_GROWSUP);
+        /// `PROT_GROWSDOWN`
+        #[cfg(linux_kernel)]
+        const GROWSDOWN = bitcast!(c::PROT_GROWSDOWN);
+        /// `PROT_SEM`
+        #[cfg(linux_kernel)]
+        const SEM = linux_raw_sys::general::PROT_SEM;
+        /// `PROT_BTI`
+        #[cfg(all(linux_kernel, target_arch = "aarch64"))]
+        const BTI = linux_raw_sys::general::PROT_BTI;
+        /// `PROT_MTE`
+        #[cfg(all(linux_kernel, target_arch = "aarch64"))]
+        const MTE = linux_raw_sys::general::PROT_MTE;
+        /// `PROT_SAO`
+        #[cfg(all(linux_kernel, any(target_arch = "powerpc", target_arch = "powerpc64")))]
+        const SAO = linux_raw_sys::general::PROT_SAO;
+        /// `PROT_ADI`
+        #[cfg(all(linux_kernel, any(target_arch = "sparc", target_arch = "sparc64")))]
+        const ADI = linux_raw_sys::general::PROT_ADI;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MAP_*` flags for use with [`mmap`].
+    ///
+    /// For `MAP_ANONYMOUS` (aka `MAP_ANON`), see [`mmap_anonymous`].
+    ///
+    /// [`mmap`]: crate::mm::mmap
+    /// [`mmap_anonymous`]: crates::mm::mmap_anonymous
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MapFlags: u32 {
+        /// `MAP_SHARED`
+        const SHARED = bitcast!(c::MAP_SHARED);
+        /// `MAP_SHARED_VALIDATE`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "android",
+            target_os = "emscripten",
+            target_os = "fuchsia",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const SHARED_VALIDATE = bitcast!(c::MAP_SHARED_VALIDATE);
+        /// `MAP_PRIVATE`
+        const PRIVATE = bitcast!(c::MAP_PRIVATE);
+        /// `MAP_DENYWRITE`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const DENYWRITE = bitcast!(c::MAP_DENYWRITE);
+        /// `MAP_FIXED`
+        const FIXED = bitcast!(c::MAP_FIXED);
+        /// `MAP_FIXED_NOREPLACE`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "android",
+            target_os = "emscripten",
+            target_os = "fuchsia",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const FIXED_NOREPLACE = bitcast!(c::MAP_FIXED_NOREPLACE);
+        /// `MAP_GROWSDOWN`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const GROWSDOWN = bitcast!(c::MAP_GROWSDOWN);
+        /// `MAP_HUGETLB`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const HUGETLB = bitcast!(c::MAP_HUGETLB);
+        /// `MAP_HUGE_2MB`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "android",
+            target_os = "emscripten",
+            target_os = "fuchsia",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const HUGE_2MB = bitcast!(c::MAP_HUGE_2MB);
+        /// `MAP_HUGE_1GB`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "android",
+            target_os = "emscripten",
+            target_os = "fuchsia",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const HUGE_1GB = bitcast!(c::MAP_HUGE_1GB);
+        /// `MAP_LOCKED`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const LOCKED = bitcast!(c::MAP_LOCKED);
+        /// `MAP_NOCORE`
+        #[cfg(freebsdlike)]
+        const NOCORE = bitcast!(c::MAP_NOCORE);
+        /// `MAP_NORESERVE`
+        #[cfg(not(any(
+            freebsdlike,
+            target_os = "aix",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const NORESERVE = bitcast!(c::MAP_NORESERVE);
+        /// `MAP_NOSYNC`
+        #[cfg(freebsdlike)]
+        const NOSYNC = bitcast!(c::MAP_NOSYNC);
+        /// `MAP_POPULATE`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+        )))]
+        const POPULATE = bitcast!(c::MAP_POPULATE);
+        /// `MAP_STACK`
+        #[cfg(not(any(
+            apple,
+            solarish,
+            target_os = "aix",
+            target_os = "dragonfly",
+            target_os = "haiku",
+            target_os = "netbsd",
+            target_os = "redox",
+        )))]
+        const STACK = bitcast!(c::MAP_STACK);
+        /// `MAP_PREFAULT_READ`
+        #[cfg(target_os = "freebsd")]
+        const PREFAULT_READ = bitcast!(c::MAP_PREFAULT_READ);
+        /// `MAP_SYNC`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            target_os = "aix",
+            target_os = "android",
+            target_os = "emscripten",
+            target_os = "fuchsia",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "redox",
+            all(
+                linux_kernel,
+                any(target_arch = "mips", target_arch = "mips32r6", target_arch = "mips64", target_arch = "mips64r6"),
+            )
+        )))]
+        const SYNC = bitcast!(c::MAP_SYNC);
+        /// `MAP_UNINITIALIZED`
+        #[cfg(any())]
+        const UNINITIALIZED = bitcast!(c::MAP_UNINITIALIZED);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(any(target_os = "emscripten", target_os = "linux"))]
+bitflags! {
+    /// `MREMAP_*` flags for use with [`mremap`].
+    ///
+    /// For `MREMAP_FIXED`, see [`mremap_fixed`].
+    ///
+    /// [`mremap`]: crate::mm::mremap
+    /// [`mremap_fixed`]: crate::mm::mremap_fixed
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MremapFlags: u32 {
+        /// `MREMAP_MAYMOVE`
+        const MAYMOVE = bitcast!(c::MREMAP_MAYMOVE);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MS_*` flags for use with [`msync`].
+    ///
+    /// [`msync`]: crate::mm::msync
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MsyncFlags: u32 {
+        /// `MS_SYNC`—Requests an update and waits for it to complete.
+        const SYNC = bitcast!(c::MS_SYNC);
+        /// `MS_ASYNC`—Specifies that an update be scheduled, but the call
+        /// returns immediately.
+        const ASYNC = bitcast!(c::MS_ASYNC);
+        /// `MS_INVALIDATE`—Asks to invalidate other mappings of the same
+        /// file (so that they can be updated with the fresh values just
+        /// written).
+        const INVALIDATE = bitcast!(c::MS_INVALIDATE);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `MLOCK_*` flags for use with [`mlock_with`].
+    ///
+    /// [`mlock_with`]: crate::mm::mlock_with
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MlockFlags: u32 {
+        /// `MLOCK_ONFAULT`
+        const ONFAULT = bitcast!(c::MLOCK_ONFAULT);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `POSIX_MADV_*` constants for use with [`madvise`].
+///
+/// [`madvise`]: crate::mm::madvise
+#[cfg(not(target_os = "redox"))]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+#[repr(u32)]
+#[non_exhaustive]
+pub enum Advice {
+    /// `POSIX_MADV_NORMAL`
+    #[cfg(not(any(target_os = "android", target_os = "haiku")))]
+    Normal = bitcast!(c::POSIX_MADV_NORMAL),
+
+    /// `POSIX_MADV_NORMAL`
+    #[cfg(any(target_os = "android", target_os = "haiku"))]
+    Normal = bitcast!(c::MADV_NORMAL),
+
+    /// `POSIX_MADV_SEQUENTIAL`
+    #[cfg(not(any(target_os = "android", target_os = "haiku")))]
+    Sequential = bitcast!(c::POSIX_MADV_SEQUENTIAL),
+
+    /// `POSIX_MADV_SEQUENTIAL`
+    #[cfg(any(target_os = "android", target_os = "haiku"))]
+    Sequential = bitcast!(c::MADV_SEQUENTIAL),
+
+    /// `POSIX_MADV_RANDOM`
+    #[cfg(not(any(target_os = "android", target_os = "haiku")))]
+    Random = bitcast!(c::POSIX_MADV_RANDOM),
+
+    /// `POSIX_MADV_RANDOM`
+    #[cfg(any(target_os = "android", target_os = "haiku"))]
+    Random = bitcast!(c::MADV_RANDOM),
+
+    /// `POSIX_MADV_WILLNEED`
+    #[cfg(not(any(target_os = "android", target_os = "haiku")))]
+    WillNeed = bitcast!(c::POSIX_MADV_WILLNEED),
+
+    /// `POSIX_MADV_WILLNEED`
+    #[cfg(any(target_os = "android", target_os = "haiku"))]
+    WillNeed = bitcast!(c::MADV_WILLNEED),
+
+    /// `POSIX_MADV_DONTNEED`
+    #[cfg(not(any(target_os = "android", target_os = "emscripten", target_os = "haiku")))]
+    DontNeed = bitcast!(c::POSIX_MADV_DONTNEED),
+
+    /// `POSIX_MADV_DONTNEED`
+    #[cfg(any(target_os = "android", target_os = "haiku"))]
+    DontNeed = bitcast!(i32::MAX - 1),
+
+    /// `MADV_DONTNEED`
+    // `MADV_DONTNEED` has the same value as `POSIX_MADV_DONTNEED`. We don't
+    // have a separate `posix_madvise` from `madvise`, so we expose a special
+    // value which we special-case.
+    #[cfg(target_os = "linux")]
+    LinuxDontNeed = bitcast!(i32::MAX),
+
+    /// `MADV_DONTNEED`
+    #[cfg(target_os = "android")]
+    LinuxDontNeed = bitcast!(c::MADV_DONTNEED),
+    /// `MADV_FREE`
+    #[cfg(linux_kernel)]
+    LinuxFree = bitcast!(c::MADV_FREE),
+    /// `MADV_REMOVE`
+    #[cfg(linux_kernel)]
+    LinuxRemove = bitcast!(c::MADV_REMOVE),
+    /// `MADV_DONTFORK`
+    #[cfg(linux_kernel)]
+    LinuxDontFork = bitcast!(c::MADV_DONTFORK),
+    /// `MADV_DOFORK`
+    #[cfg(linux_kernel)]
+    LinuxDoFork = bitcast!(c::MADV_DOFORK),
+    /// `MADV_HWPOISON`
+    #[cfg(linux_kernel)]
+    LinuxHwPoison = bitcast!(c::MADV_HWPOISON),
+    /// `MADV_SOFT_OFFLINE`
+    #[cfg(all(
+        linux_kernel,
+        not(any(
+            target_arch = "mips",
+            target_arch = "mips32r6",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        ))
+    ))]
+    LinuxSoftOffline = bitcast!(c::MADV_SOFT_OFFLINE),
+    /// `MADV_MERGEABLE`
+    #[cfg(linux_kernel)]
+    LinuxMergeable = bitcast!(c::MADV_MERGEABLE),
+    /// `MADV_UNMERGEABLE`
+    #[cfg(linux_kernel)]
+    LinuxUnmergeable = bitcast!(c::MADV_UNMERGEABLE),
+    /// `MADV_HUGEPAGE`
+    #[cfg(linux_kernel)]
+    LinuxHugepage = bitcast!(c::MADV_HUGEPAGE),
+    /// `MADV_NOHUGEPAGE`
+    #[cfg(linux_kernel)]
+    LinuxNoHugepage = bitcast!(c::MADV_NOHUGEPAGE),
+    /// `MADV_DONTDUMP` (since Linux 3.4)
+    #[cfg(linux_kernel)]
+    LinuxDontDump = bitcast!(c::MADV_DONTDUMP),
+    /// `MADV_DODUMP` (since Linux 3.4)
+    #[cfg(linux_kernel)]
+    LinuxDoDump = bitcast!(c::MADV_DODUMP),
+    /// `MADV_WIPEONFORK` (since Linux 4.14)
+    #[cfg(linux_kernel)]
+    LinuxWipeOnFork = bitcast!(c::MADV_WIPEONFORK),
+    /// `MADV_KEEPONFORK` (since Linux 4.14)
+    #[cfg(linux_kernel)]
+    LinuxKeepOnFork = bitcast!(c::MADV_KEEPONFORK),
+    /// `MADV_COLD` (since Linux 5.4)
+    #[cfg(linux_kernel)]
+    LinuxCold = bitcast!(c::MADV_COLD),
+    /// `MADV_PAGEOUT` (since Linux 5.4)
+    #[cfg(linux_kernel)]
+    LinuxPageOut = bitcast!(c::MADV_PAGEOUT),
+    /// `MADV_POPULATE_READ` (since Linux 5.14)
+    #[cfg(linux_kernel)]
+    LinuxPopulateRead = bitcast!(c::MADV_POPULATE_READ),
+    /// `MADV_POPULATE_WRITE` (since Linux 5.14)
+    #[cfg(linux_kernel)]
+    LinuxPopulateWrite = bitcast!(c::MADV_POPULATE_WRITE),
+    /// `MADV_DONTNEED_LOCKED` (since Linux 5.18)
+    #[cfg(linux_kernel)]
+    LinuxDontneedLocked = bitcast!(c::MADV_DONTNEED_LOCKED),
+}
+
+#[cfg(target_os = "emscripten")]
+#[allow(non_upper_case_globals)]
+impl Advice {
+    /// `POSIX_MADV_DONTNEED`
+    pub const DontNeed: Self = Self::Normal;
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `O_*` flags for use with [`userfaultfd`].
+    ///
+    /// [`userfaultfd`]: crate::mm::userfaultfd
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct UserfaultfdFlags: u32 {
+        /// `O_CLOEXEC`
+        const CLOEXEC = bitcast!(c::O_CLOEXEC);
+        /// `O_NONBLOCK`
+        const NONBLOCK = bitcast!(c::O_NONBLOCK);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(any(linux_kernel, freebsdlike, netbsdlike))]
+bitflags! {
+    /// `MCL_*` flags for use with [`mlockall`].
+    ///
+    /// [`mlockall`]: crate::mm::mlockall
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MlockAllFlags: u32 {
+        /// Used together with `MCL_CURRENT`, `MCL_FUTURE`, or both. Mark all
+        /// current (with `MCL_CURRENT`) or future (with `MCL_FUTURE`) mappings
+        /// to lock pages when they are faulted in. When used with
+        /// `MCL_CURRENT`, all present pages are locked, but `mlockall` will
+        /// not fault in non-present pages. When used with `MCL_FUTURE`, all
+        /// future mappings will be marked to lock pages when they are faulted
+        /// in, but they will not be populated by the lock when the mapping is
+        /// created. `MCL_ONFAULT` must be used with either `MCL_CURRENT` or
+        /// `MCL_FUTURE` or both.
+        #[cfg(linux_kernel)]
+        const ONFAULT = bitcast!(libc::MCL_ONFAULT);
+        /// Lock all pages which will become mapped into the address space of
+        /// the process in the future. These could be, for instance, new pages
+        /// required by a growing heap and stack as well as new memory-mapped
+        /// files or shared memory regions.
+        const FUTURE = bitcast!(libc::MCL_FUTURE);
+        /// Lock all pages which are currently mapped into the address space of
+        /// the process.
+        const CURRENT = bitcast!(libc::MCL_CURRENT);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/mod.rs b/vendor/rustix/src/backend/libc/mod.rs
new file mode 100644
index 0000000..9ecb09f
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/mod.rs
@@ -0,0 +1,215 @@
+//! The libc backend.
+//!
+//! On most platforms, this uses the `libc` crate to make system calls. On
+//! Windows, this uses the Winsock API in `windows-sys`, which can be adapted
+//! to have a very `libc`-like interface.
+
+// Every FFI call requires an unsafe block, and there are a lot of FFI
+// calls. For now, set this to allow for the libc backend.
+#![allow(clippy::undocumented_unsafe_blocks)]
+// Lots of libc types vary between platforms, so we often need a `.into()` on
+// one platform where it's redundant on another.
+#![allow(clippy::useless_conversion)]
+
+mod conv;
+
+#[cfg(windows)]
+pub(crate) mod fd {
+    pub use crate::maybe_polyfill::os::windows::io::{
+        AsRawSocket, AsSocket, BorrowedSocket as BorrowedFd, FromRawSocket, IntoRawSocket,
+        OwnedSocket as OwnedFd, RawSocket as RawFd,
+    };
+    pub(crate) use windows_sys::Win32::Networking::WinSock::SOCKET as LibcFd;
+
+    /// A version of [`AsRawFd`] for use with Winsock API.
+    ///
+    /// [`AsRawFd`]: https://doc.rust-lang.org/stable/std/os/fd/trait.AsRawFd.html
+    pub trait AsRawFd {
+        /// A version of [`as_raw_fd`] for use with Winsock API.
+        ///
+        /// [`as_raw_fd`]: https://doc.rust-lang.org/stable/std/os/fd/trait.FromRawFd.html#tymethod.as_raw_fd
+        fn as_raw_fd(&self) -> RawFd;
+    }
+    impl<T: AsRawSocket> AsRawFd for T {
+        #[inline]
+        fn as_raw_fd(&self) -> RawFd {
+            self.as_raw_socket()
+        }
+    }
+
+    /// A version of [`IntoRawFd`] for use with Winsock API.
+    ///
+    /// [`IntoRawFd`]: https://doc.rust-lang.org/stable/std/os/fd/trait.IntoRawFd.html
+    pub trait IntoRawFd {
+        /// A version of [`into_raw_fd`] for use with Winsock API.
+        ///
+        /// [`into_raw_fd`]: https://doc.rust-lang.org/stable/std/os/fd/trait.FromRawFd.html#tymethod.into_raw_fd
+        fn into_raw_fd(self) -> RawFd;
+    }
+    impl<T: IntoRawSocket> IntoRawFd for T {
+        #[inline]
+        fn into_raw_fd(self) -> RawFd {
+            self.into_raw_socket()
+        }
+    }
+
+    /// A version of [`FromRawFd`] for use with Winsock API.
+    ///
+    /// [`FromRawFd`]: https://doc.rust-lang.org/stable/std/os/fd/trait.FromRawFd.html
+    pub trait FromRawFd {
+        /// A version of [`from_raw_fd`] for use with Winsock API.
+        ///
+        /// # Safety
+        ///
+        /// See the [safety requirements] for [`from_raw_fd`].
+        ///
+        /// [`from_raw_fd`]: https://doc.rust-lang.org/stable/std/os/fd/trait.FromRawFd.html#tymethod.from_raw_fd
+        /// [safety requirements]: https://doc.rust-lang.org/stable/std/os/fd/trait.FromRawFd.html#safety
+        unsafe fn from_raw_fd(raw_fd: RawFd) -> Self;
+    }
+    impl<T: FromRawSocket> FromRawFd for T {
+        #[inline]
+        unsafe fn from_raw_fd(raw_fd: RawFd) -> Self {
+            Self::from_raw_socket(raw_fd)
+        }
+    }
+
+    /// A version of [`AsFd`] for use with Winsock API.
+    ///
+    /// [`AsFd`]: https://doc.rust-lang.org/stable/std/os/fd/trait.AsFd.html
+    pub trait AsFd {
+        /// An `as_fd` function for Winsock, where a `Fd` is a `Socket`.
+        fn as_fd(&self) -> BorrowedFd;
+    }
+    impl<T: AsSocket> AsFd for T {
+        #[inline]
+        fn as_fd(&self) -> BorrowedFd {
+            self.as_socket()
+        }
+    }
+}
+#[cfg(not(windows))]
+pub(crate) mod fd {
+    pub use crate::maybe_polyfill::os::fd::{
+        AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, OwnedFd, RawFd,
+    };
+    #[allow(unused_imports)]
+    pub(crate) use RawFd as LibcFd;
+}
+
+// On Windows we emulate selected libc-compatible interfaces. On non-Windows,
+// we just use libc here, since this is the libc backend.
+#[cfg_attr(windows, path = "winsock_c.rs")]
+pub(crate) mod c;
+
+#[cfg(feature = "event")]
+pub(crate) mod event;
+#[cfg(not(windows))]
+#[cfg(feature = "fs")]
+pub(crate) mod fs;
+pub(crate) mod io;
+#[cfg(linux_kernel)]
+#[cfg(feature = "io_uring")]
+pub(crate) mod io_uring;
+#[cfg(not(any(windows, target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+#[cfg(feature = "mm")]
+pub(crate) mod mm;
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) mod mount;
+#[cfg(linux_kernel)]
+#[cfg(all(feature = "fs", not(feature = "mount")))]
+pub(crate) mod mount; // for deprecated mount functions in "fs"
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+#[cfg(feature = "net")]
+pub(crate) mod net;
+#[cfg(not(any(windows, target_os = "espidf")))]
+#[cfg(any(
+    feature = "param",
+    feature = "runtime",
+    feature = "time",
+    target_arch = "x86",
+))]
+pub(crate) mod param;
+#[cfg(not(windows))]
+#[cfg(feature = "pipe")]
+pub(crate) mod pipe;
+#[cfg(not(windows))]
+#[cfg(feature = "process")]
+pub(crate) mod process;
+#[cfg(not(windows))]
+#[cfg(not(target_os = "wasi"))]
+#[cfg(feature = "pty")]
+pub(crate) mod pty;
+#[cfg(not(windows))]
+#[cfg(feature = "rand")]
+pub(crate) mod rand;
+#[cfg(not(windows))]
+#[cfg(not(target_os = "wasi"))]
+#[cfg(feature = "system")]
+pub(crate) mod system;
+#[cfg(not(any(windows, target_os = "vita")))]
+#[cfg(feature = "termios")]
+pub(crate) mod termios;
+#[cfg(not(windows))]
+#[cfg(feature = "thread")]
+pub(crate) mod thread;
+#[cfg(not(any(windows, target_os = "espidf")))]
+#[cfg(feature = "time")]
+pub(crate) mod time;
+
+/// If the host libc is glibc, return `true` if it is less than version 2.25.
+///
+/// To restate and clarify, this function returning true does not mean the libc
+/// is glibc just that if it is glibc, it is less than version 2.25.
+///
+/// For now, this function is only available on Linux, but if it ends up being
+/// used beyond that, this could be changed to e.g. `#[cfg(unix)]`.
+#[cfg(all(unix, target_env = "gnu"))]
+pub(crate) fn if_glibc_is_less_than_2_25() -> bool {
+    // This is also defined inside `weak_or_syscall!` in
+    // backend/libc/rand/syscalls.rs, but it's not convenient to re-export the
+    // weak symbol from that macro, so we duplicate it at a small cost here.
+    weak! { fn getrandom(*mut c::c_void, c::size_t, c::c_uint) -> c::ssize_t }
+
+    // glibc 2.25 has `getrandom`, which is how we satisfy the API contract of
+    // this function. But, there are likely other libc versions which have it.
+    getrandom.get().is_none()
+}
+
+// Private modules used by multiple public modules.
+#[cfg(any(feature = "procfs", feature = "process", feature = "runtime"))]
+#[cfg(not(any(windows, target_os = "wasi")))]
+pub(crate) mod pid;
+#[cfg(any(feature = "process", feature = "thread"))]
+#[cfg(linux_kernel)]
+pub(crate) mod prctl;
+#[cfg(not(any(
+    windows,
+    target_os = "android",
+    target_os = "espidf",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[cfg(feature = "shm")]
+pub(crate) mod shm;
+#[cfg(any(feature = "fs", feature = "thread", feature = "process"))]
+#[cfg(not(any(windows, target_os = "wasi")))]
+pub(crate) mod ugid;
+
+#[cfg(bsd)]
+const MAX_IOV: usize = c::IOV_MAX as usize;
+
+#[cfg(any(linux_kernel, target_os = "emscripten", target_os = "nto"))]
+const MAX_IOV: usize = c::UIO_MAXIOV as usize;
+
+#[cfg(not(any(
+    bsd,
+    linux_kernel,
+    windows,
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "nto",
+    target_os = "horizon",
+)))]
+const MAX_IOV: usize = 16; // The minimum value required by POSIX.
diff --git a/vendor/rustix/src/backend/libc/mount/mod.rs b/vendor/rustix/src/backend/libc/mount/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/mount/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/libc/mount/syscalls.rs b/vendor/rustix/src/backend/libc/mount/syscalls.rs
new file mode 100644
index 0000000..7245114
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/mount/syscalls.rs
@@ -0,0 +1,272 @@
+use crate::backend::c;
+use crate::backend::conv::ret;
+#[cfg(feature = "mount")]
+use crate::backend::conv::{borrowed_fd, c_str, ret_owned_fd};
+#[cfg(feature = "mount")]
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::ffi::CStr;
+use crate::io;
+use core::ptr::null;
+
+#[cfg(linux_kernel)]
+pub(crate) fn mount(
+    source: Option<&CStr>,
+    target: &CStr,
+    file_system_type: Option<&CStr>,
+    flags: super::types::MountFlagsArg,
+    data: Option<&CStr>,
+) -> io::Result<()> {
+    unsafe {
+        ret(c::mount(
+            source.map_or_else(null, CStr::as_ptr),
+            target.as_ptr(),
+            file_system_type.map_or_else(null, CStr::as_ptr),
+            flags.0,
+            data.map_or_else(null, CStr::as_ptr).cast(),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn unmount(target: &CStr, flags: super::types::UnmountFlags) -> io::Result<()> {
+    unsafe { ret(c::umount2(target.as_ptr(), bitflags_bits!(flags))) }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsopen(fs_name: &CStr, flags: super::types::FsOpenFlags) -> io::Result<OwnedFd> {
+    syscall! {
+        fn fsopen(
+            fs_name: *const c::c_char,
+            flags: c::c_uint
+        ) via SYS_fsopen -> c::c_int
+    }
+    unsafe { ret_owned_fd(fsopen(c_str(fs_name), flags.bits())) }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsmount(
+    fs_fd: BorrowedFd<'_>,
+    flags: super::types::FsMountFlags,
+    attr_flags: super::types::MountAttrFlags,
+) -> io::Result<OwnedFd> {
+    syscall! {
+        fn fsmount(
+            fs_fd: c::c_int,
+            flags: c::c_uint,
+            attr_flags: c::c_uint
+        ) via SYS_fsmount -> c::c_int
+    }
+    unsafe { ret_owned_fd(fsmount(borrowed_fd(fs_fd), flags.bits(), attr_flags.bits())) }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn move_mount(
+    from_dfd: BorrowedFd<'_>,
+    from_pathname: &CStr,
+    to_dfd: BorrowedFd<'_>,
+    to_pathname: &CStr,
+    flags: super::types::MoveMountFlags,
+) -> io::Result<()> {
+    syscall! {
+        fn move_mount(
+            from_dfd: c::c_int,
+            from_pathname: *const c::c_char,
+            to_dfd: c::c_int,
+            to_pathname: *const c::c_char,
+            flags: c::c_uint
+        ) via SYS_move_mount -> c::c_int
+    }
+    unsafe {
+        ret(move_mount(
+            borrowed_fd(from_dfd),
+            c_str(from_pathname),
+            borrowed_fd(to_dfd),
+            c_str(to_pathname),
+            flags.bits(),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn open_tree(
+    dfd: BorrowedFd<'_>,
+    filename: &CStr,
+    flags: super::types::OpenTreeFlags,
+) -> io::Result<OwnedFd> {
+    syscall! {
+        fn open_tree(
+            dfd: c::c_int,
+            filename: *const c::c_char,
+            flags: c::c_uint
+        ) via SYS_open_tree -> c::c_int
+    }
+
+    unsafe { ret_owned_fd(open_tree(borrowed_fd(dfd), c_str(filename), flags.bits())) }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fspick(
+    dfd: BorrowedFd<'_>,
+    path: &CStr,
+    flags: super::types::FsPickFlags,
+) -> io::Result<OwnedFd> {
+    syscall! {
+        fn fspick(
+            dfd: c::c_int,
+            path: *const c::c_char,
+            flags: c::c_uint
+        ) via SYS_fspick -> c::c_int
+    }
+
+    unsafe { ret_owned_fd(fspick(borrowed_fd(dfd), c_str(path), flags.bits())) }
+}
+
+#[cfg(feature = "mount")]
+#[cfg(linux_kernel)]
+syscall! {
+    fn fsconfig(
+        fs_fd: c::c_int,
+        cmd: c::c_uint,
+        key: *const c::c_char,
+        val: *const c::c_char,
+        aux: c::c_int
+    ) via SYS_fsconfig -> c::c_int
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsconfig_set_flag(fs_fd: BorrowedFd<'_>, key: &CStr) -> io::Result<()> {
+    unsafe {
+        ret(fsconfig(
+            borrowed_fd(fs_fd),
+            super::types::FsConfigCmd::SetFlag as _,
+            c_str(key),
+            null(),
+            0,
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsconfig_set_string(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    value: &CStr,
+) -> io::Result<()> {
+    unsafe {
+        ret(fsconfig(
+            borrowed_fd(fs_fd),
+            super::types::FsConfigCmd::SetString as _,
+            c_str(key),
+            c_str(value),
+            0,
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsconfig_set_binary(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    value: &[u8],
+) -> io::Result<()> {
+    unsafe {
+        ret(fsconfig(
+            borrowed_fd(fs_fd),
+            super::types::FsConfigCmd::SetBinary as _,
+            c_str(key),
+            value.as_ptr().cast(),
+            value.len().try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsconfig_set_fd(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    fd: BorrowedFd<'_>,
+) -> io::Result<()> {
+    unsafe {
+        ret(fsconfig(
+            borrowed_fd(fs_fd),
+            super::types::FsConfigCmd::SetFd as _,
+            c_str(key),
+            null(),
+            borrowed_fd(fd),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsconfig_set_path(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    path: &CStr,
+    fd: BorrowedFd<'_>,
+) -> io::Result<()> {
+    unsafe {
+        ret(fsconfig(
+            borrowed_fd(fs_fd),
+            super::types::FsConfigCmd::SetPath as _,
+            c_str(key),
+            c_str(path),
+            borrowed_fd(fd),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsconfig_set_path_empty(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    fd: BorrowedFd<'_>,
+) -> io::Result<()> {
+    unsafe {
+        ret(fsconfig(
+            borrowed_fd(fs_fd),
+            super::types::FsConfigCmd::SetPathEmpty as _,
+            c_str(key),
+            c_str(cstr!("")),
+            borrowed_fd(fd),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsconfig_create(fs_fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe {
+        ret(fsconfig(
+            borrowed_fd(fs_fd),
+            super::types::FsConfigCmd::Create as _,
+            null(),
+            null(),
+            0,
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(feature = "mount")]
+pub(crate) fn fsconfig_reconfigure(fs_fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe {
+        ret(fsconfig(
+            borrowed_fd(fs_fd),
+            super::types::FsConfigCmd::Reconfigure as _,
+            null(),
+            null(),
+            0,
+        ))
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/mount/types.rs b/vendor/rustix/src/backend/libc/mount/types.rs
new file mode 100644
index 0000000..1023686
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/mount/types.rs
@@ -0,0 +1,340 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `MS_*` constants for use with [`mount`].
+    ///
+    /// [`mount`]: crate::mount::mount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MountFlags: c::c_ulong {
+        /// `MS_BIND`
+        const BIND = c::MS_BIND;
+
+        /// `MS_DIRSYNC`
+        const DIRSYNC = c::MS_DIRSYNC;
+
+        /// `MS_LAZYTIME`
+        const LAZYTIME = c::MS_LAZYTIME;
+
+        /// `MS_MANDLOCK`
+        #[doc(alias = "MANDLOCK")]
+        const PERMIT_MANDATORY_FILE_LOCKING = c::MS_MANDLOCK;
+
+        /// `MS_NOATIME`
+        const NOATIME = c::MS_NOATIME;
+
+        /// `MS_NODEV`
+        const NODEV = c::MS_NODEV;
+
+        /// `MS_NODIRATIME`
+        const NODIRATIME = c::MS_NODIRATIME;
+
+        /// `MS_NOEXEC`
+        const NOEXEC = c::MS_NOEXEC;
+
+        /// `MS_NOSUID`
+        const NOSUID = c::MS_NOSUID;
+
+        /// `MS_RDONLY`
+        const RDONLY = c::MS_RDONLY;
+
+        /// `MS_REC`
+        const REC = c::MS_REC;
+
+        /// `MS_RELATIME`
+        const RELATIME = c::MS_RELATIME;
+
+        /// `MS_SILENT`
+        const SILENT = c::MS_SILENT;
+
+        /// `MS_STRICTATIME`
+        const STRICTATIME = c::MS_STRICTATIME;
+
+        /// `MS_SYNCHRONOUS`
+        const SYNCHRONOUS = c::MS_SYNCHRONOUS;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `MNT_*` constants for use with [`unmount`].
+    ///
+    /// [`unmount`]: crate::mount::unmount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct UnmountFlags: u32 {
+        /// `MNT_FORCE`
+        const FORCE = bitcast!(c::MNT_FORCE);
+        /// `MNT_DETACH`
+        const DETACH = bitcast!(c::MNT_DETACH);
+        /// `MNT_EXPIRE`
+        const EXPIRE = bitcast!(c::MNT_EXPIRE);
+        /// `UMOUNT_NOFOLLOW`
+        const NOFOLLOW = bitcast!(c::UMOUNT_NOFOLLOW);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `FSOPEN_*` constants for use with [`fsopen`].
+    ///
+    /// [`fsopen`]: crate::mount::fsopen
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FsOpenFlags: c::c_uint {
+        /// `FSOPEN_CLOEXEC`
+        const FSOPEN_CLOEXEC = 0x0000_0001;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `FSMOUNT_*` constants for use with [`fsmount`].
+    ///
+    /// [`fsmount`]: crate::mount::fsmount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FsMountFlags: c::c_uint {
+        /// `FSMOUNT_CLOEXEC`
+        const FSMOUNT_CLOEXEC = 0x0000_0001;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `FSCONFIG_*` constants for use with the `fsconfig` syscall.
+#[cfg(feature = "mount")]
+#[cfg(linux_kernel)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+#[repr(u32)]
+pub(crate) enum FsConfigCmd {
+    /// `FSCONFIG_SET_FLAG`
+    SetFlag = 0,
+
+    /// `FSCONFIG_SET_STRING`
+    SetString = 1,
+
+    /// `FSCONFIG_SET_BINARY`
+    SetBinary = 2,
+
+    /// `FSCONFIG_SET_PATH`
+    SetPath = 3,
+
+    /// `FSCONFIG_SET_PATH_EMPTY`
+    SetPathEmpty = 4,
+
+    /// `FSCONFIG_SET_FD`
+    SetFd = 5,
+
+    /// `FSCONFIG_CMD_CREATE`
+    Create = 6,
+
+    /// `FSCONFIG_CMD_RECONFIGURE`
+    Reconfigure = 7,
+}
+
+#[cfg(feature = "mount")]
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `MOUNT_ATTR_*` constants for use with [`fsmount`].
+    ///
+    /// [`fsmount`]: crate::mount::fsmount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MountAttrFlags: c::c_uint {
+        /// `MOUNT_ATTR_RDONLY`
+        const MOUNT_ATTR_RDONLY = 0x0000_0001;
+
+        /// `MOUNT_ATTR_NOSUID`
+        const MOUNT_ATTR_NOSUID = 0x0000_0002;
+
+        /// `MOUNT_ATTR_NODEV`
+        const MOUNT_ATTR_NODEV = 0x0000_0004;
+
+        /// `MOUNT_ATTR_NOEXEC`
+        const MOUNT_ATTR_NOEXEC = 0x0000_0008;
+
+        /// `MOUNT_ATTR__ATIME`
+        const MOUNT_ATTR__ATIME = 0x0000_0070;
+
+        /// `MOUNT_ATTR_RELATIME`
+        const MOUNT_ATTR_RELATIME = 0x0000_0000;
+
+        /// `MOUNT_ATTR_NOATIME`
+        const MOUNT_ATTR_NOATIME = 0x0000_0010;
+
+        /// `MOUNT_ATTR_STRICTATIME`
+        const MOUNT_ATTR_STRICTATIME = 0x0000_0020;
+
+        /// `MOUNT_ATTR_NODIRATIME`
+        const MOUNT_ATTR_NODIRATIME = 0x0000_0080;
+
+        /// `MOUNT_ATTR_NOUSER`
+        const MOUNT_ATTR_IDMAP = 0x0010_0000;
+
+        /// `MOUNT_ATTR__ATIME_FLAGS`
+        const MOUNT_ATTR_NOSYMFOLLOW = 0x0020_0000;
+
+        /// `MOUNT_ATTR__ATIME_FLAGS`
+        const MOUNT_ATTR_SIZE_VER0 = 32;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `MOVE_MOUNT_*` constants for use with [`move_mount`].
+    ///
+    /// [`move_mount`]: crate::mount::move_mount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MoveMountFlags: c::c_uint {
+        /// `MOVE_MOUNT_F_EMPTY_PATH`
+        const MOVE_MOUNT_F_SYMLINKS = 0x0000_0001;
+
+        /// `MOVE_MOUNT_F_AUTOMOUNTS`
+        const MOVE_MOUNT_F_AUTOMOUNTS = 0x0000_0002;
+
+        /// `MOVE_MOUNT_F_EMPTY_PATH`
+        const MOVE_MOUNT_F_EMPTY_PATH = 0x0000_0004;
+
+        /// `MOVE_MOUNT_T_SYMLINKS`
+        const MOVE_MOUNT_T_SYMLINKS = 0x0000_0010;
+
+        /// `MOVE_MOUNT_T_AUTOMOUNTS`
+        const MOVE_MOUNT_T_AUTOMOUNTS = 0x0000_0020;
+
+        /// `MOVE_MOUNT_T_EMPTY_PATH`
+        const MOVE_MOUNT_T_EMPTY_PATH = 0x0000_0040;
+
+        /// `MOVE_MOUNT__MASK`
+        const MOVE_MOUNT_SET_GROUP = 0x0000_0100;
+
+        // TODO: add when Linux 6.5 is released
+        // /// `MOVE_MOUNT_BENEATH`
+        // const MOVE_MOUNT_BENEATH = 0x0000_0200;
+
+        /// `MOVE_MOUNT__MASK`
+        const MOVE_MOUNT__MASK = 0x0000_0377;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `OPENTREE_*` constants for use with [`open_tree`].
+    ///
+    /// [`open_tree`]: crate::mount::open_tree
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct OpenTreeFlags: c::c_uint {
+        /// `OPENTREE_CLONE`
+        const OPEN_TREE_CLONE = 1;
+
+        /// `OPENTREE_CLOEXEC`
+        const OPEN_TREE_CLOEXEC = c::O_CLOEXEC as c::c_uint;
+
+        /// `AT_EMPTY_PATH`
+        const AT_EMPTY_PATH = c::AT_EMPTY_PATH as c::c_uint;
+
+        /// `AT_NO_AUTOMOUNT`
+        const AT_NO_AUTOMOUNT = c::AT_NO_AUTOMOUNT as c::c_uint;
+
+        /// `AT_RECURSIVE`
+        const AT_RECURSIVE = c::AT_RECURSIVE as c::c_uint;
+
+        /// `AT_SYMLINK_NOFOLLOW`
+        const AT_SYMLINK_NOFOLLOW = c::AT_SYMLINK_NOFOLLOW as c::c_uint;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `FSPICK_*` constants for use with [`fspick`].
+    ///
+    /// [`fspick`]: crate::mount::fspick
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FsPickFlags: c::c_uint {
+        /// `FSPICK_CLOEXEC`
+        const FSPICK_CLOEXEC = 0x0000_0001;
+
+        /// `FSPICK_SYMLINK_NOFOLLOW`
+        const FSPICK_SYMLINK_NOFOLLOW = 0x0000_0002;
+
+        /// `FSPICK_NO_AUTOMOUNT`
+        const FSPICK_NO_AUTOMOUNT = 0x0000_0004;
+
+        /// `FSPICK_EMPTY_PATH`
+        const FSPICK_EMPTY_PATH = 0x0000_0008;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `MS_*` constants for use with [`mount_change`].
+    ///
+    /// [`mount_change`]: crate::mount::mount_change
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MountPropagationFlags: c::c_ulong {
+        /// `MS_SILENT`
+        const SILENT = c::MS_SILENT;
+        /// `MS_SHARED`
+        const SHARED = c::MS_SHARED;
+        /// `MS_PRIVATE`
+        const PRIVATE = c::MS_PRIVATE;
+        /// `MS_SLAVE`
+        const SLAVE = c::MS_SLAVE;
+        /// `MS_UNBINDABLE`
+        const UNBINDABLE = c::MS_UNBINDABLE;
+        /// `MS_REC`
+        const REC = c::MS_REC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub(crate) struct InternalMountFlags: c::c_ulong {
+        const REMOUNT = c::MS_REMOUNT;
+        const MOVE = c::MS_MOVE;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) struct MountFlagsArg(pub(crate) c::c_ulong);
diff --git a/vendor/rustix/src/backend/libc/net/addr.rs b/vendor/rustix/src/backend/libc/net/addr.rs
new file mode 100644
index 0000000..719a549
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/addr.rs
@@ -0,0 +1,245 @@
+//! Socket address utilities.
+
+use crate::backend::c;
+#[cfg(unix)]
+use {
+    crate::ffi::CStr,
+    crate::io,
+    crate::path,
+    core::cmp::Ordering,
+    core::fmt,
+    core::hash::{Hash, Hasher},
+    core::slice,
+};
+
+/// `struct sockaddr_un`
+#[cfg(unix)]
+#[derive(Clone)]
+#[doc(alias = "sockaddr_un")]
+pub struct SocketAddrUnix {
+    pub(crate) unix: c::sockaddr_un,
+    #[cfg(not(any(bsd, target_os = "haiku")))]
+    len: c::socklen_t,
+}
+
+#[cfg(unix)]
+impl SocketAddrUnix {
+    /// Construct a new Unix-domain address from a filesystem path.
+    #[inline]
+    pub fn new<P: path::Arg>(path: P) -> io::Result<Self> {
+        path.into_with_c_str(Self::_new)
+    }
+
+    #[inline]
+    fn _new(path: &CStr) -> io::Result<Self> {
+        let mut unix = Self::init();
+        let bytes = path.to_bytes_with_nul();
+        if bytes.len() > unix.sun_path.len() {
+            return Err(io::Errno::NAMETOOLONG);
+        }
+        for (i, b) in bytes.iter().enumerate() {
+            unix.sun_path[i] = *b as c::c_char;
+        }
+
+        #[cfg(any(bsd, target_os = "haiku"))]
+        {
+            unix.sun_len = (offsetof_sun_path() + bytes.len()).try_into().unwrap();
+        }
+
+        Ok(Self {
+            unix,
+            #[cfg(not(any(bsd, target_os = "haiku")))]
+            len: (offsetof_sun_path() + bytes.len()).try_into().unwrap(),
+        })
+    }
+
+    /// Construct a new abstract Unix-domain address from a byte slice.
+    #[cfg(linux_kernel)]
+    #[inline]
+    pub fn new_abstract_name(name: &[u8]) -> io::Result<Self> {
+        let mut unix = Self::init();
+        if 1 + name.len() > unix.sun_path.len() {
+            return Err(io::Errno::NAMETOOLONG);
+        }
+        unix.sun_path[0] = 0;
+        for (i, b) in name.iter().enumerate() {
+            unix.sun_path[1 + i] = *b as c::c_char;
+        }
+        let len = offsetof_sun_path() + 1 + name.len();
+        let len = len.try_into().unwrap();
+        Ok(Self {
+            unix,
+            #[cfg(not(any(bsd, target_os = "haiku")))]
+            len,
+        })
+    }
+
+    fn init() -> c::sockaddr_un {
+        c::sockaddr_un {
+            #[cfg(any(bsd, target_os = "aix", target_os = "haiku", target_os = "nto"))]
+            sun_len: 0,
+            #[cfg(target_os = "vita")]
+            ss_len: 0,
+            sun_family: c::AF_UNIX as _,
+            #[cfg(any(bsd, target_os = "nto"))]
+            sun_path: [0; 104],
+            #[cfg(not(any(bsd, target_os = "aix", target_os = "haiku", target_os = "nto")))]
+            sun_path: [0; 108],
+            #[cfg(target_os = "haiku")]
+            sun_path: [0; 126],
+            #[cfg(target_os = "aix")]
+            sun_path: [0; 1023],
+        }
+    }
+
+    /// For a filesystem path address, return the path.
+    #[inline]
+    pub fn path(&self) -> Option<&CStr> {
+        let len = self.len();
+        if len != 0 && self.unix.sun_path[0] != 0 {
+            let end = len as usize - offsetof_sun_path();
+            let bytes = &self.unix.sun_path[..end];
+            // SAFETY: `from_raw_parts` to convert from `&[c_char]` to `&[u8]`.
+            // And `from_bytes_with_nul_unchecked` since the string is
+            // NUL-terminated.
+            unsafe {
+                Some(CStr::from_bytes_with_nul_unchecked(slice::from_raw_parts(
+                    bytes.as_ptr().cast(),
+                    bytes.len(),
+                )))
+            }
+        } else {
+            None
+        }
+    }
+
+    /// For an abstract address, return the identifier.
+    #[cfg(linux_kernel)]
+    #[inline]
+    pub fn abstract_name(&self) -> Option<&[u8]> {
+        let len = self.len();
+        if len != 0 && self.unix.sun_path[0] == 0 {
+            let end = len as usize - offsetof_sun_path();
+            let bytes = &self.unix.sun_path[1..end];
+            // SAFETY: `from_raw_parts` to convert from `&[c_char]` to `&[u8]`.
+            unsafe { Some(slice::from_raw_parts(bytes.as_ptr().cast(), bytes.len())) }
+        } else {
+            None
+        }
+    }
+
+    #[inline]
+    pub(crate) fn addr_len(&self) -> c::socklen_t {
+        #[cfg(not(any(bsd, target_os = "haiku")))]
+        {
+            self.len
+        }
+        #[cfg(any(bsd, target_os = "haiku"))]
+        {
+            c::socklen_t::from(self.unix.sun_len)
+        }
+    }
+
+    #[inline]
+    pub(crate) fn len(&self) -> usize {
+        self.addr_len() as usize
+    }
+}
+
+#[cfg(unix)]
+impl PartialEq for SocketAddrUnix {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        let self_len = self.len() - offsetof_sun_path();
+        let other_len = other.len() - offsetof_sun_path();
+        self.unix.sun_path[..self_len].eq(&other.unix.sun_path[..other_len])
+    }
+}
+
+#[cfg(unix)]
+impl Eq for SocketAddrUnix {}
+
+#[cfg(unix)]
+impl PartialOrd for SocketAddrUnix {
+    #[inline]
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+#[cfg(unix)]
+impl Ord for SocketAddrUnix {
+    #[inline]
+    fn cmp(&self, other: &Self) -> Ordering {
+        let self_len = self.len() - offsetof_sun_path();
+        let other_len = other.len() - offsetof_sun_path();
+        self.unix.sun_path[..self_len].cmp(&other.unix.sun_path[..other_len])
+    }
+}
+
+#[cfg(unix)]
+impl Hash for SocketAddrUnix {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        let self_len = self.len() - offsetof_sun_path();
+        self.unix.sun_path[..self_len].hash(state)
+    }
+}
+
+#[cfg(unix)]
+impl fmt::Debug for SocketAddrUnix {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if let Some(path) = self.path() {
+            path.fmt(fmt)
+        } else {
+            #[cfg(linux_kernel)]
+            if let Some(name) = self.abstract_name() {
+                return name.fmt(fmt);
+            }
+
+            "(unnamed)".fmt(fmt)
+        }
+    }
+}
+
+/// `struct sockaddr_storage` as a raw struct.
+pub type SocketAddrStorage = c::sockaddr_storage;
+
+/// Return the offset of the `sun_path` field of `sockaddr_un`.
+#[cfg(not(windows))]
+#[inline]
+pub(crate) fn offsetof_sun_path() -> usize {
+    let z = c::sockaddr_un {
+        #[cfg(any(bsd, target_os = "aix", target_os = "haiku", target_os = "nto"))]
+        sun_len: 0_u8,
+        #[cfg(target_os = "vita")]
+        ss_len: 0,
+        #[cfg(any(
+            bsd,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita"
+        ))]
+        sun_family: 0_u8,
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita"
+        )))]
+        sun_family: 0_u16,
+        #[cfg(any(bsd, target_os = "nto"))]
+        sun_path: [0; 104],
+        #[cfg(not(any(bsd, target_os = "aix", target_os = "haiku", target_os = "nto")))]
+        sun_path: [0; 108],
+        #[cfg(target_os = "haiku")]
+        sun_path: [0; 126],
+        #[cfg(target_os = "aix")]
+        sun_path: [0; 1023],
+    };
+    (crate::utils::as_ptr(&z.sun_path) as usize) - (crate::utils::as_ptr(&z) as usize)
+}
diff --git a/vendor/rustix/src/backend/libc/net/ext.rs b/vendor/rustix/src/backend/libc/net/ext.rs
new file mode 100644
index 0000000..2e11c05
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/ext.rs
@@ -0,0 +1,135 @@
+use crate::backend::c;
+
+/// The windows `sockaddr_in6` type is a union with accessor functions which
+/// are not `const fn`. Define our own layout-compatible version so that we
+/// can transmute in and out of it.
+#[cfg(windows)]
+#[repr(C)]
+struct sockaddr_in6 {
+    sin6_family: u16,
+    sin6_port: u16,
+    sin6_flowinfo: u32,
+    sin6_addr: c::in6_addr,
+    sin6_scope_id: u32,
+}
+
+#[cfg(not(windows))]
+#[inline]
+pub(crate) const fn in_addr_s_addr(addr: c::in_addr) -> u32 {
+    addr.s_addr
+}
+
+#[cfg(windows)]
+#[inline]
+pub(crate) const fn in_addr_s_addr(addr: c::in_addr) -> u32 {
+    // This should be `*addr.S_un.S_addr()`, except that isn't a `const fn`.
+    unsafe { core::mem::transmute(addr) }
+}
+
+#[cfg(not(windows))]
+#[inline]
+pub(crate) const fn in_addr_new(s_addr: u32) -> c::in_addr {
+    c::in_addr { s_addr }
+}
+
+#[cfg(windows)]
+#[inline]
+pub(crate) const fn in_addr_new(s_addr: u32) -> c::in_addr {
+    unsafe { core::mem::transmute(s_addr) }
+}
+
+#[cfg(not(windows))]
+#[inline]
+pub(crate) const fn in6_addr_s6_addr(addr: c::in6_addr) -> [u8; 16] {
+    addr.s6_addr
+}
+
+#[cfg(windows)]
+#[inline]
+pub(crate) const fn in6_addr_s6_addr(addr: c::in6_addr) -> [u8; 16] {
+    unsafe { core::mem::transmute(addr) }
+}
+
+#[cfg(not(windows))]
+#[inline]
+pub(crate) const fn in6_addr_new(s6_addr: [u8; 16]) -> c::in6_addr {
+    c::in6_addr { s6_addr }
+}
+
+#[cfg(windows)]
+#[inline]
+pub(crate) const fn in6_addr_new(s6_addr: [u8; 16]) -> c::in6_addr {
+    unsafe { core::mem::transmute(s6_addr) }
+}
+
+#[cfg(not(windows))]
+#[inline]
+pub(crate) const fn sockaddr_in6_sin6_scope_id(addr: &c::sockaddr_in6) -> u32 {
+    addr.sin6_scope_id
+}
+
+#[cfg(windows)]
+#[inline]
+pub(crate) const fn sockaddr_in6_sin6_scope_id(addr: &c::sockaddr_in6) -> u32 {
+    let addr: &sockaddr_in6 = unsafe { core::mem::transmute(addr) };
+    addr.sin6_scope_id
+}
+
+#[cfg(not(windows))]
+#[inline]
+pub(crate) const fn sockaddr_in6_new(
+    #[cfg(any(
+        bsd,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "vita"
+    ))]
+    sin6_len: u8,
+    sin6_family: c::sa_family_t,
+    sin6_port: u16,
+    sin6_flowinfo: u32,
+    sin6_addr: c::in6_addr,
+    sin6_scope_id: u32,
+) -> c::sockaddr_in6 {
+    c::sockaddr_in6 {
+        #[cfg(any(
+            bsd,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita"
+        ))]
+        sin6_len,
+        sin6_family,
+        sin6_port,
+        sin6_flowinfo,
+        sin6_addr,
+        sin6_scope_id,
+        #[cfg(solarish)]
+        __sin6_src_id: 0,
+        #[cfg(target_os = "vita")]
+        sin6_vport: 0,
+    }
+}
+
+#[cfg(windows)]
+#[inline]
+pub(crate) const fn sockaddr_in6_new(
+    sin6_family: u16,
+    sin6_port: u16,
+    sin6_flowinfo: u32,
+    sin6_addr: c::in6_addr,
+    sin6_scope_id: u32,
+) -> c::sockaddr_in6 {
+    let addr = sockaddr_in6 {
+        sin6_family,
+        sin6_port,
+        sin6_flowinfo,
+        sin6_addr,
+        sin6_scope_id,
+    };
+    unsafe { core::mem::transmute(addr) }
+}
diff --git a/vendor/rustix/src/backend/libc/net/mod.rs b/vendor/rustix/src/backend/libc/net/mod.rs
new file mode 100644
index 0000000..d7ab68d
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/mod.rs
@@ -0,0 +1,16 @@
+pub(crate) mod addr;
+pub(crate) mod ext;
+#[cfg(not(any(
+    windows,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) mod msghdr;
+pub(crate) mod read_sockaddr;
+pub(crate) mod send_recv;
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) mod sockopt;
+pub(crate) mod syscalls;
+pub(crate) mod write_sockaddr;
diff --git a/vendor/rustix/src/backend/libc/net/msghdr.rs b/vendor/rustix/src/backend/libc/net/msghdr.rs
new file mode 100644
index 0000000..dd9b156
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/msghdr.rs
@@ -0,0 +1,134 @@
+//! Utilities for dealing with message headers.
+//!
+//! These take closures rather than returning a `c::msghdr` directly because
+//! the message headers may reference stack-local data.
+
+use crate::backend::c;
+use crate::backend::conv::{msg_control_len, msg_iov_len};
+use crate::backend::net::write_sockaddr::{encode_sockaddr_v4, encode_sockaddr_v6};
+
+use crate::io::{self, IoSlice, IoSliceMut};
+use crate::net::{RecvAncillaryBuffer, SendAncillaryBuffer, SocketAddrV4, SocketAddrV6};
+use crate::utils::as_ptr;
+
+use core::mem::{size_of, zeroed, MaybeUninit};
+
+/// Create a message header intended to receive a datagram.
+pub(crate) fn with_recv_msghdr<R>(
+    name: &mut MaybeUninit<c::sockaddr_storage>,
+    iov: &mut [IoSliceMut<'_>],
+    control: &mut RecvAncillaryBuffer<'_>,
+    f: impl FnOnce(&mut c::msghdr) -> io::Result<R>,
+) -> io::Result<R> {
+    control.clear();
+
+    let namelen = size_of::<c::sockaddr_storage>() as c::socklen_t;
+    let mut msghdr = {
+        let mut h = zero_msghdr();
+        h.msg_name = name.as_mut_ptr().cast();
+        h.msg_namelen = namelen;
+        h.msg_iov = iov.as_mut_ptr().cast();
+        h.msg_iovlen = msg_iov_len(iov.len());
+        h.msg_control = control.as_control_ptr().cast();
+        h.msg_controllen = msg_control_len(control.control_len());
+        h
+    };
+
+    let res = f(&mut msghdr);
+
+    // Reset the control length.
+    if res.is_ok() {
+        unsafe {
+            control.set_control_len(msghdr.msg_controllen.try_into().unwrap_or(usize::MAX));
+        }
+    }
+
+    res
+}
+
+/// Create a message header intended to send without an address.
+pub(crate) fn with_noaddr_msghdr<R>(
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    f: impl FnOnce(c::msghdr) -> R,
+) -> R {
+    f({
+        let mut h = zero_msghdr();
+        h.msg_iov = iov.as_ptr() as _;
+        h.msg_iovlen = msg_iov_len(iov.len());
+        h.msg_control = control.as_control_ptr().cast();
+        h.msg_controllen = msg_control_len(control.control_len());
+        h
+    })
+}
+
+/// Create a message header intended to send with an IPv4 address.
+pub(crate) fn with_v4_msghdr<R>(
+    addr: &SocketAddrV4,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    f: impl FnOnce(c::msghdr) -> R,
+) -> R {
+    let encoded = encode_sockaddr_v4(addr);
+
+    f({
+        let mut h = zero_msghdr();
+        h.msg_name = as_ptr(&encoded) as _;
+        h.msg_namelen = size_of::<SocketAddrV4>() as _;
+        h.msg_iov = iov.as_ptr() as _;
+        h.msg_iovlen = msg_iov_len(iov.len());
+        h.msg_control = control.as_control_ptr().cast();
+        h.msg_controllen = msg_control_len(control.control_len());
+        h
+    })
+}
+
+/// Create a message header intended to send with an IPv6 address.
+pub(crate) fn with_v6_msghdr<R>(
+    addr: &SocketAddrV6,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    f: impl FnOnce(c::msghdr) -> R,
+) -> R {
+    let encoded = encode_sockaddr_v6(addr);
+
+    f({
+        let mut h = zero_msghdr();
+        h.msg_name = as_ptr(&encoded) as _;
+        h.msg_namelen = size_of::<SocketAddrV6>() as _;
+        h.msg_iov = iov.as_ptr() as _;
+        h.msg_iovlen = msg_iov_len(iov.len());
+        h.msg_control = control.as_control_ptr().cast();
+        h.msg_controllen = msg_control_len(control.control_len());
+        h
+    })
+}
+
+/// Create a message header intended to send with a Unix address.
+#[cfg(all(unix, not(target_os = "redox")))]
+pub(crate) fn with_unix_msghdr<R>(
+    addr: &crate::net::SocketAddrUnix,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    f: impl FnOnce(c::msghdr) -> R,
+) -> R {
+    f({
+        let mut h = zero_msghdr();
+        h.msg_name = as_ptr(&addr.unix) as _;
+        h.msg_namelen = addr.addr_len();
+        h.msg_iov = iov.as_ptr() as _;
+        h.msg_iovlen = msg_iov_len(iov.len());
+        h.msg_control = control.as_control_ptr().cast();
+        h.msg_controllen = msg_control_len(control.control_len());
+        h
+    })
+}
+
+/// Create a zero-initialized message header struct value.
+#[cfg(all(unix, not(target_os = "redox")))]
+pub(crate) fn zero_msghdr() -> c::msghdr {
+    // SAFETY: We can't initialize all the fields by value because on some
+    // platforms the `msghdr` struct in the libc crate contains private padding
+    // fields. But it is still a C type that's meant to be zero-initializable.
+    unsafe { zeroed() }
+}
diff --git a/vendor/rustix/src/backend/libc/net/read_sockaddr.rs b/vendor/rustix/src/backend/libc/net/read_sockaddr.rs
new file mode 100644
index 0000000..6da7a50
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/read_sockaddr.rs
@@ -0,0 +1,306 @@
+//! The BSD sockets API requires us to read the `ss_family` field before we can
+//! interpret the rest of a `sockaddr` produced by the kernel.
+
+#[cfg(unix)]
+use super::addr::SocketAddrUnix;
+use super::ext::{in6_addr_s6_addr, in_addr_s_addr, sockaddr_in6_sin6_scope_id};
+use crate::backend::c;
+#[cfg(not(windows))]
+use crate::ffi::CStr;
+use crate::io;
+use crate::net::{Ipv4Addr, Ipv6Addr, SocketAddrAny, SocketAddrV4, SocketAddrV6};
+use core::mem::size_of;
+
+// This must match the header of `sockaddr`.
+#[repr(C)]
+struct sockaddr_header {
+    #[cfg(any(
+        bsd,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "vita"
+    ))]
+    sa_len: u8,
+    #[cfg(any(
+        bsd,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "vita"
+    ))]
+    ss_family: u8,
+    #[cfg(not(any(
+        bsd,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "vita"
+    )))]
+    ss_family: u16,
+}
+
+/// Read the `ss_family` field from a socket address returned from the OS.
+///
+/// # Safety
+///
+/// `storage` must point to a valid socket address returned from the OS.
+#[inline]
+unsafe fn read_ss_family(storage: *const c::sockaddr_storage) -> u16 {
+    // Assert that we know the layout of `sockaddr`.
+    let _ = c::sockaddr {
+        #[cfg(any(
+            bsd,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita"
+        ))]
+        sa_len: 0_u8,
+        #[cfg(any(
+            bsd,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita"
+        ))]
+        sa_family: 0_u8,
+        #[cfg(not(any(
+            bsd,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita"
+        )))]
+        sa_family: 0_u16,
+        #[cfg(not(target_os = "haiku"))]
+        sa_data: [0; 14],
+        #[cfg(target_os = "haiku")]
+        sa_data: [0; 30],
+    };
+
+    (*storage.cast::<sockaddr_header>()).ss_family.into()
+}
+
+/// Set the `ss_family` field of a socket address to `AF_UNSPEC`, so that we
+/// can test for `AF_UNSPEC` to test whether it was stored to.
+pub(crate) unsafe fn initialize_family_to_unspec(storage: *mut c::sockaddr_storage) {
+    (*storage.cast::<sockaddr_header>()).ss_family = c::AF_UNSPEC as _;
+}
+
+/// Read a socket address encoded in a platform-specific format.
+///
+/// # Safety
+///
+/// `storage` must point to valid socket address storage.
+pub(crate) unsafe fn read_sockaddr(
+    storage: *const c::sockaddr_storage,
+    len: usize,
+) -> io::Result<SocketAddrAny> {
+    #[cfg(unix)]
+    let offsetof_sun_path = super::addr::offsetof_sun_path();
+
+    if len < size_of::<c::sa_family_t>() {
+        return Err(io::Errno::INVAL);
+    }
+    match read_ss_family(storage).into() {
+        c::AF_INET => {
+            if len < size_of::<c::sockaddr_in>() {
+                return Err(io::Errno::INVAL);
+            }
+            let decode = &*storage.cast::<c::sockaddr_in>();
+            Ok(SocketAddrAny::V4(SocketAddrV4::new(
+                Ipv4Addr::from(u32::from_be(in_addr_s_addr(decode.sin_addr))),
+                u16::from_be(decode.sin_port),
+            )))
+        }
+        c::AF_INET6 => {
+            if len < size_of::<c::sockaddr_in6>() {
+                return Err(io::Errno::INVAL);
+            }
+            let decode = &*storage.cast::<c::sockaddr_in6>();
+            #[cfg(not(windows))]
+            let s6_addr = decode.sin6_addr.s6_addr;
+            #[cfg(windows)]
+            let s6_addr = decode.sin6_addr.u.Byte;
+            #[cfg(not(windows))]
+            let sin6_scope_id = decode.sin6_scope_id;
+            #[cfg(windows)]
+            let sin6_scope_id = decode.Anonymous.sin6_scope_id;
+            Ok(SocketAddrAny::V6(SocketAddrV6::new(
+                Ipv6Addr::from(s6_addr),
+                u16::from_be(decode.sin6_port),
+                u32::from_be(decode.sin6_flowinfo),
+                sin6_scope_id,
+            )))
+        }
+        #[cfg(unix)]
+        c::AF_UNIX => {
+            if len < offsetof_sun_path {
+                return Err(io::Errno::INVAL);
+            }
+            if len == offsetof_sun_path {
+                SocketAddrUnix::new(&[][..]).map(SocketAddrAny::Unix)
+            } else {
+                let decode = &*storage.cast::<c::sockaddr_un>();
+
+                // On Linux check for Linux's [abstract namespace].
+                //
+                // [abstract namespace]: https://man7.org/linux/man-pages/man7/unix.7.html
+                #[cfg(linux_kernel)]
+                if decode.sun_path[0] == 0 {
+                    return SocketAddrUnix::new_abstract_name(core::mem::transmute::<
+                        &[c::c_char],
+                        &[u8],
+                    >(
+                        &decode.sun_path[1..len - offsetof_sun_path],
+                    ))
+                    .map(SocketAddrAny::Unix);
+                }
+
+                // Otherwise we expect a NUL-terminated filesystem path.
+
+                // Trim off unused bytes from the end of `path_bytes`.
+                let path_bytes = if cfg!(any(solarish, target_os = "freebsd")) {
+                    // FreeBSD and illumos sometimes set the length to longer
+                    // than the length of the NUL-terminated string. Find the
+                    // NUL and truncate the string accordingly.
+                    &decode.sun_path[..decode
+                        .sun_path
+                        .iter()
+                        .position(|b| *b == 0)
+                        .ok_or(io::Errno::INVAL)?]
+                } else {
+                    // Otherwise, use the provided length.
+                    let provided_len = len - 1 - offsetof_sun_path;
+                    if decode.sun_path[provided_len] != 0 {
+                        return Err(io::Errno::INVAL);
+                    }
+                    debug_assert_eq!(
+                        CStr::from_ptr(decode.sun_path.as_ptr()).to_bytes().len(),
+                        provided_len
+                    );
+                    &decode.sun_path[..provided_len]
+                };
+
+                SocketAddrUnix::new(core::mem::transmute::<&[c::c_char], &[u8]>(path_bytes))
+                    .map(SocketAddrAny::Unix)
+            }
+        }
+        _ => Err(io::Errno::INVAL),
+    }
+}
+
+/// Read an optional socket address returned from the OS.
+///
+/// # Safety
+///
+/// `storage` must point to a valid socket address returned from the OS.
+pub(crate) unsafe fn maybe_read_sockaddr_os(
+    storage: *const c::sockaddr_storage,
+    len: usize,
+) -> Option<SocketAddrAny> {
+    if len == 0 {
+        return None;
+    }
+
+    assert!(len >= size_of::<c::sa_family_t>());
+    let family = read_ss_family(storage).into();
+    if family == c::AF_UNSPEC {
+        None
+    } else {
+        Some(inner_read_sockaddr_os(family, storage, len))
+    }
+}
+
+/// Read a socket address returned from the OS.
+///
+/// # Safety
+///
+/// `storage` must point to a valid socket address returned from the OS.
+pub(crate) unsafe fn read_sockaddr_os(
+    storage: *const c::sockaddr_storage,
+    len: usize,
+) -> SocketAddrAny {
+    assert!(len >= size_of::<c::sa_family_t>());
+    let family = read_ss_family(storage).into();
+    inner_read_sockaddr_os(family, storage, len)
+}
+
+unsafe fn inner_read_sockaddr_os(
+    family: c::c_int,
+    storage: *const c::sockaddr_storage,
+    len: usize,
+) -> SocketAddrAny {
+    #[cfg(unix)]
+    let offsetof_sun_path = super::addr::offsetof_sun_path();
+
+    assert!(len >= size_of::<c::sa_family_t>());
+    match family {
+        c::AF_INET => {
+            assert!(len >= size_of::<c::sockaddr_in>());
+            let decode = &*storage.cast::<c::sockaddr_in>();
+            SocketAddrAny::V4(SocketAddrV4::new(
+                Ipv4Addr::from(u32::from_be(in_addr_s_addr(decode.sin_addr))),
+                u16::from_be(decode.sin_port),
+            ))
+        }
+        c::AF_INET6 => {
+            assert!(len >= size_of::<c::sockaddr_in6>());
+            let decode = &*storage.cast::<c::sockaddr_in6>();
+            SocketAddrAny::V6(SocketAddrV6::new(
+                Ipv6Addr::from(in6_addr_s6_addr(decode.sin6_addr)),
+                u16::from_be(decode.sin6_port),
+                u32::from_be(decode.sin6_flowinfo),
+                sockaddr_in6_sin6_scope_id(decode),
+            ))
+        }
+        #[cfg(unix)]
+        c::AF_UNIX => {
+            assert!(len >= offsetof_sun_path);
+            if len == offsetof_sun_path {
+                SocketAddrAny::Unix(SocketAddrUnix::new(&[][..]).unwrap())
+            } else {
+                let decode = &*storage.cast::<c::sockaddr_un>();
+
+                // On Linux check for Linux's [abstract namespace].
+                //
+                // [abstract namespace]: https://man7.org/linux/man-pages/man7/unix.7.html
+                #[cfg(linux_kernel)]
+                if decode.sun_path[0] == 0 {
+                    return SocketAddrAny::Unix(
+                        SocketAddrUnix::new_abstract_name(core::mem::transmute::<
+                            &[c::c_char],
+                            &[u8],
+                        >(
+                            &decode.sun_path[1..len - offsetof_sun_path],
+                        ))
+                        .unwrap(),
+                    );
+                }
+
+                // Otherwise we expect a NUL-terminated filesystem path.
+                assert_eq!(decode.sun_path[len - 1 - offsetof_sun_path], 0);
+                let path_bytes = &decode.sun_path[..len - 1 - offsetof_sun_path];
+
+                // FreeBSD and illumos sometimes set the length to longer than
+                // the length of the NUL-terminated string. Find the NUL and
+                // truncate the string accordingly.
+                #[cfg(any(solarish, target_os = "freebsd"))]
+                let path_bytes = &path_bytes[..path_bytes.iter().position(|b| *b == 0).unwrap()];
+
+                SocketAddrAny::Unix(
+                    SocketAddrUnix::new(core::mem::transmute::<&[c::c_char], &[u8]>(path_bytes))
+                        .unwrap(),
+                )
+            }
+        }
+        other => unimplemented!("{:?}", other),
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/net/send_recv.rs b/vendor/rustix/src/backend/libc/net/send_recv.rs
new file mode 100644
index 0000000..5dc60dd
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/send_recv.rs
@@ -0,0 +1,103 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `MSG_*` flags for use with [`send`], [`send_to`], and related
+    /// functions.
+    ///
+    /// [`send`]: crate::net::send
+    /// [`sendto`]: crate::net::sendto
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct SendFlags: u32 {
+        /// `MSG_CONFIRM`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            windows,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "nto",
+            target_os = "haiku",
+            target_os = "vita",
+        )))]
+        const CONFIRM = bitcast!(c::MSG_CONFIRM);
+        /// `MSG_DONTROUTE`
+        const DONTROUTE = bitcast!(c::MSG_DONTROUTE);
+        /// `MSG_DONTWAIT`
+        #[cfg(not(windows))]
+        const DONTWAIT = bitcast!(c::MSG_DONTWAIT);
+        /// `MSG_EOR`
+        #[cfg(not(windows))]
+        const EOT = bitcast!(c::MSG_EOR);
+        /// `MSG_MORE`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            windows,
+            target_os = "aix",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita",
+        )))]
+        const MORE = bitcast!(c::MSG_MORE);
+        #[cfg(not(any(apple, windows, target_os = "vita")))]
+        /// `MSG_NOSIGNAL`
+        const NOSIGNAL = bitcast!(c::MSG_NOSIGNAL);
+        /// `MSG_OOB`
+        const OOB = bitcast!(c::MSG_OOB);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MSG_*` flags for use with [`recv`], [`recvfrom`], and related
+    /// functions.
+    ///
+    /// [`recv`]: crate::net::recv
+    /// [`recvfrom`]: crate::net::recvfrom
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct RecvFlags: u32 {
+        #[cfg(not(any(
+            apple,
+            solarish,
+            windows,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita",
+        )))]
+        /// `MSG_CMSG_CLOEXEC`
+        const CMSG_CLOEXEC = bitcast!(c::MSG_CMSG_CLOEXEC);
+        /// `MSG_DONTWAIT`
+        #[cfg(not(windows))]
+        const DONTWAIT = bitcast!(c::MSG_DONTWAIT);
+        /// `MSG_ERRQUEUE`
+        #[cfg(not(any(
+            bsd,
+            solarish,
+            windows,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita",
+        )))]
+        const ERRQUEUE = bitcast!(c::MSG_ERRQUEUE);
+        /// `MSG_OOB`
+        const OOB = bitcast!(c::MSG_OOB);
+        /// `MSG_PEEK`
+        const PEEK = bitcast!(c::MSG_PEEK);
+        /// `MSG_TRUNC`
+        const TRUNC = bitcast!(c::MSG_TRUNC);
+        /// `MSG_WAITALL`
+        const WAITALL = bitcast!(c::MSG_WAITALL);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/net/sockopt.rs b/vendor/rustix/src/backend/libc/net/sockopt.rs
new file mode 100644
index 0000000..cff2ca2
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/sockopt.rs
@@ -0,0 +1,1065 @@
+//! libc syscalls supporting `rustix::net::sockopt`.
+
+use super::ext::{in6_addr_new, in_addr_new};
+use crate::backend::c;
+use crate::backend::conv::{borrowed_fd, ret};
+use crate::fd::BorrowedFd;
+#[cfg(feature = "alloc")]
+#[cfg(any(
+    linux_like,
+    target_os = "freebsd",
+    target_os = "fuchsia",
+    target_os = "illumos"
+))]
+use crate::ffi::CStr;
+use crate::io;
+use crate::net::sockopt::Timeout;
+#[cfg(not(any(
+    apple,
+    windows,
+    target_os = "aix",
+    target_os = "dragonfly",
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "netbsd",
+    target_os = "nto",
+    target_os = "vita",
+)))]
+use crate::net::AddressFamily;
+#[cfg(any(
+    linux_kernel,
+    target_os = "freebsd",
+    target_os = "fuchsia",
+    target_os = "openbsd",
+    target_os = "redox",
+    target_env = "newlib"
+))]
+use crate::net::Protocol;
+#[cfg(any(
+    linux_kernel,
+    target_os = "freebsd",
+    target_os = "fuchsia",
+    target_os = "openbsd",
+    target_os = "redox",
+    target_env = "newlib"
+))]
+use crate::net::RawProtocol;
+use crate::net::{Ipv4Addr, Ipv6Addr, SocketType};
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+use crate::net::{SocketAddrAny, SocketAddrStorage, SocketAddrV4};
+#[cfg(linux_kernel)]
+use crate::net::{SocketAddrV6, UCred};
+use crate::utils::as_mut_ptr;
+#[cfg(feature = "alloc")]
+#[cfg(any(
+    linux_like,
+    target_os = "freebsd",
+    target_os = "fuchsia",
+    target_os = "illumos"
+))]
+use alloc::borrow::ToOwned;
+#[cfg(feature = "alloc")]
+#[cfg(any(
+    linux_like,
+    target_os = "freebsd",
+    target_os = "fuchsia",
+    target_os = "illumos"
+))]
+use alloc::string::String;
+#[cfg(apple)]
+use c::TCP_KEEPALIVE as TCP_KEEPIDLE;
+#[cfg(not(any(apple, target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+use c::TCP_KEEPIDLE;
+use core::mem::{size_of, MaybeUninit};
+use core::time::Duration;
+#[cfg(windows)]
+use windows_sys::Win32::Foundation::BOOL;
+
+#[inline]
+fn getsockopt<T: Copy>(fd: BorrowedFd<'_>, level: i32, optname: i32) -> io::Result<T> {
+    let mut optlen = core::mem::size_of::<T>().try_into().unwrap();
+    debug_assert!(
+        optlen as usize >= core::mem::size_of::<c::c_int>(),
+        "Socket APIs don't ever use `bool` directly"
+    );
+
+    let mut value = MaybeUninit::<T>::zeroed();
+    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
+
+    // On Windows at least, `getsockopt` has been observed writing 1
+    // byte on at least (`IPPROTO_TCP`, `TCP_NODELAY`), even though
+    // Windows' documentation says that should write a 4-byte `BOOL`.
+    // So, we initialize the memory to zeros above, and just assert
+    // that `getsockopt` doesn't write too many bytes here.
+    assert!(
+        optlen as usize <= size_of::<T>(),
+        "unexpected getsockopt size"
+    );
+
+    unsafe { Ok(value.assume_init()) }
+}
+
+#[inline]
+fn getsockopt_raw<T>(
+    fd: BorrowedFd<'_>,
+    level: i32,
+    optname: i32,
+    value: &mut MaybeUninit<T>,
+    optlen: &mut c::socklen_t,
+) -> io::Result<()> {
+    unsafe {
+        ret(c::getsockopt(
+            borrowed_fd(fd),
+            level,
+            optname,
+            as_mut_ptr(value).cast(),
+            optlen,
+        ))
+    }
+}
+
+#[inline]
+fn setsockopt<T: Copy>(fd: BorrowedFd<'_>, level: i32, optname: i32, value: T) -> io::Result<()> {
+    let optlen = core::mem::size_of::<T>().try_into().unwrap();
+    debug_assert!(
+        optlen as usize >= core::mem::size_of::<c::c_int>(),
+        "Socket APIs don't ever use `bool` directly"
+    );
+    setsockopt_raw(fd, level, optname, &value, optlen)
+}
+
+#[inline]
+fn setsockopt_raw<T>(
+    fd: BorrowedFd<'_>,
+    level: i32,
+    optname: i32,
+    ptr: *const T,
+    optlen: c::socklen_t,
+) -> io::Result<()> {
+    unsafe {
+        ret(c::setsockopt(
+            borrowed_fd(fd),
+            level,
+            optname,
+            ptr.cast(),
+            optlen,
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn get_socket_type(fd: BorrowedFd<'_>) -> io::Result<SocketType> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_TYPE)
+}
+
+#[inline]
+pub(crate) fn set_socket_reuseaddr(fd: BorrowedFd<'_>, reuseaddr: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_REUSEADDR, from_bool(reuseaddr))
+}
+
+#[inline]
+pub(crate) fn get_socket_reuseaddr(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_REUSEADDR).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_broadcast(fd: BorrowedFd<'_>, broadcast: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_BROADCAST, from_bool(broadcast))
+}
+
+#[inline]
+pub(crate) fn get_socket_broadcast(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_BROADCAST).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_linger(fd: BorrowedFd<'_>, linger: Option<Duration>) -> io::Result<()> {
+    // Convert `linger` to seconds, rounding up.
+    let l_linger = if let Some(linger) = linger {
+        duration_to_secs(linger)?
+    } else {
+        0
+    };
+    let linger = c::linger {
+        l_onoff: linger.is_some().into(),
+        l_linger,
+    };
+    setsockopt(fd, c::SOL_SOCKET, c::SO_LINGER, linger)
+}
+
+#[inline]
+pub(crate) fn get_socket_linger(fd: BorrowedFd<'_>) -> io::Result<Option<Duration>> {
+    let linger: c::linger = getsockopt(fd, c::SOL_SOCKET, c::SO_LINGER)?;
+    Ok((linger.l_onoff != 0).then(|| Duration::from_secs(linger.l_linger as u64)))
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn set_socket_passcred(fd: BorrowedFd<'_>, passcred: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_PASSCRED, from_bool(passcred))
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn get_socket_passcred(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_PASSCRED).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_timeout(
+    fd: BorrowedFd<'_>,
+    id: Timeout,
+    timeout: Option<Duration>,
+) -> io::Result<()> {
+    let optname = match id {
+        Timeout::Recv => c::SO_RCVTIMEO,
+        Timeout::Send => c::SO_SNDTIMEO,
+    };
+
+    #[cfg(not(windows))]
+    let timeout = match timeout {
+        Some(timeout) => {
+            if timeout == Duration::ZERO {
+                return Err(io::Errno::INVAL);
+            }
+
+            // Rust's musl libc bindings deprecated `time_t` while they
+            // transition to 64-bit `time_t`. What we want here is just
+            // “whatever type `timeval`'s `tv_sec` is”, so we're ok using
+            // the deprecated type.
+            #[allow(deprecated)]
+            let tv_sec = timeout.as_secs().try_into().unwrap_or(c::time_t::MAX);
+
+            // `subsec_micros` rounds down, so we use `subsec_nanos` and
+            // manually round up.
+            let mut timeout = c::timeval {
+                tv_sec,
+                tv_usec: ((timeout.subsec_nanos() + 999) / 1000) as _,
+            };
+            if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
+                timeout.tv_usec = 1;
+            }
+            timeout
+        }
+        None => c::timeval {
+            tv_sec: 0,
+            tv_usec: 0,
+        },
+    };
+
+    #[cfg(windows)]
+    let timeout: u32 = match timeout {
+        Some(timeout) => {
+            if timeout == Duration::ZERO {
+                return Err(io::Errno::INVAL);
+            }
+
+            // `as_millis` rounds down, so we use `as_nanos` and
+            // manually round up.
+            let mut timeout: u32 = ((timeout.as_nanos() + 999_999) / 1_000_000)
+                .try_into()
+                .map_err(|_convert_err| io::Errno::INVAL)?;
+            if timeout == 0 {
+                timeout = 1;
+            }
+            timeout
+        }
+        None => 0,
+    };
+
+    setsockopt(fd, c::SOL_SOCKET, optname, timeout)
+}
+
+#[inline]
+pub(crate) fn get_socket_timeout(fd: BorrowedFd<'_>, id: Timeout) -> io::Result<Option<Duration>> {
+    let optname = match id {
+        Timeout::Recv => c::SO_RCVTIMEO,
+        Timeout::Send => c::SO_SNDTIMEO,
+    };
+
+    #[cfg(not(windows))]
+    {
+        let timeout: c::timeval = getsockopt(fd, c::SOL_SOCKET, optname)?;
+        if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
+            Ok(None)
+        } else {
+            Ok(Some(
+                Duration::from_secs(timeout.tv_sec as u64)
+                    + Duration::from_micros(timeout.tv_usec as u64),
+            ))
+        }
+    }
+
+    #[cfg(windows)]
+    {
+        let timeout: u32 = getsockopt(fd, c::SOL_SOCKET, optname)?;
+        if timeout == 0 {
+            Ok(None)
+        } else {
+            Ok(Some(Duration::from_millis(timeout as u64)))
+        }
+    }
+}
+
+#[cfg(any(apple, freebsdlike, target_os = "netbsd"))]
+#[inline]
+pub(crate) fn get_socket_nosigpipe(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_NOSIGPIPE).map(to_bool)
+}
+
+#[cfg(any(apple, freebsdlike, target_os = "netbsd"))]
+#[inline]
+pub(crate) fn set_socket_nosigpipe(fd: BorrowedFd<'_>, val: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_NOSIGPIPE, from_bool(val))
+}
+
+#[inline]
+pub(crate) fn get_socket_error(fd: BorrowedFd<'_>) -> io::Result<Result<(), io::Errno>> {
+    let err: c::c_int = getsockopt(fd, c::SOL_SOCKET, c::SO_ERROR)?;
+    Ok(if err == 0 {
+        Ok(())
+    } else {
+        Err(io::Errno::from_raw_os_error(err))
+    })
+}
+
+#[inline]
+pub(crate) fn set_socket_keepalive(fd: BorrowedFd<'_>, keepalive: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_KEEPALIVE, from_bool(keepalive))
+}
+
+#[inline]
+pub(crate) fn get_socket_keepalive(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_KEEPALIVE).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_recv_buffer_size(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> {
+    let size: c::c_int = size.try_into().map_err(|_| io::Errno::INVAL)?;
+    setsockopt(fd, c::SOL_SOCKET, c::SO_RCVBUF, size)
+}
+
+#[inline]
+pub(crate) fn get_socket_recv_buffer_size(fd: BorrowedFd<'_>) -> io::Result<usize> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_RCVBUF).map(|size: u32| size as usize)
+}
+
+#[inline]
+pub(crate) fn set_socket_send_buffer_size(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> {
+    let size: c::c_int = size.try_into().map_err(|_| io::Errno::INVAL)?;
+    setsockopt(fd, c::SOL_SOCKET, c::SO_SNDBUF, size)
+}
+
+#[inline]
+pub(crate) fn get_socket_send_buffer_size(fd: BorrowedFd<'_>) -> io::Result<usize> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_SNDBUF).map(|size: u32| size as usize)
+}
+
+#[inline]
+#[cfg(not(any(
+    apple,
+    windows,
+    target_os = "aix",
+    target_os = "dragonfly",
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "netbsd",
+    target_os = "nto",
+    target_os = "vita",
+)))]
+pub(crate) fn get_socket_domain(fd: BorrowedFd<'_>) -> io::Result<AddressFamily> {
+    let domain: c::c_int = getsockopt(fd, c::SOL_SOCKET, c::SO_DOMAIN)?;
+    Ok(AddressFamily(
+        domain.try_into().map_err(|_| io::Errno::OPNOTSUPP)?,
+    ))
+}
+
+#[inline]
+#[cfg(not(apple))] // Apple platforms declare the constant, but do not actually implement it.
+pub(crate) fn get_socket_acceptconn(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_ACCEPTCONN).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_oobinline(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_OOBINLINE, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_socket_oobinline(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_OOBINLINE).map(to_bool)
+}
+
+#[cfg(not(any(solarish, windows)))]
+#[inline]
+pub(crate) fn set_socket_reuseport(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT, from_bool(value))
+}
+
+#[cfg(not(any(solarish, windows)))]
+#[inline]
+pub(crate) fn get_socket_reuseport(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT).map(to_bool)
+}
+
+#[cfg(target_os = "freebsd")]
+#[inline]
+pub(crate) fn set_socket_reuseport_lb(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT_LB, from_bool(value))
+}
+
+#[cfg(target_os = "freebsd")]
+#[inline]
+pub(crate) fn get_socket_reuseport_lb(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT_LB).map(to_bool)
+}
+
+#[cfg(any(
+    linux_kernel,
+    target_os = "freebsd",
+    target_os = "fuchsia",
+    target_os = "openbsd",
+    target_os = "redox",
+    target_env = "newlib"
+))]
+#[inline]
+pub(crate) fn get_socket_protocol(fd: BorrowedFd<'_>) -> io::Result<Option<Protocol>> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_PROTOCOL)
+        .map(|raw| RawProtocol::new(raw).map(Protocol::from_raw))
+}
+
+#[cfg(target_os = "linux")]
+#[inline]
+pub(crate) fn get_socket_cookie(fd: BorrowedFd<'_>) -> io::Result<u64> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_COOKIE)
+}
+
+#[cfg(target_os = "linux")]
+#[inline]
+pub(crate) fn get_socket_incoming_cpu(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_INCOMING_CPU)
+}
+
+#[cfg(target_os = "linux")]
+#[inline]
+pub(crate) fn set_socket_incoming_cpu(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_INCOMING_CPU, value)
+}
+
+#[inline]
+pub(crate) fn set_ip_ttl(fd: BorrowedFd<'_>, ttl: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_TTL, ttl)
+}
+
+#[inline]
+pub(crate) fn get_ip_ttl(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_TTL)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_v6only(fd: BorrowedFd<'_>, only_v6: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_V6ONLY, from_bool(only_v6))
+}
+
+#[inline]
+pub(crate) fn get_ipv6_v6only(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_V6ONLY).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ip_multicast_loop(fd: BorrowedFd<'_>, multicast_loop: bool) -> io::Result<()> {
+    setsockopt(
+        fd,
+        c::IPPROTO_IP,
+        c::IP_MULTICAST_LOOP,
+        from_bool(multicast_loop),
+    )
+}
+
+#[inline]
+pub(crate) fn get_ip_multicast_loop(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_LOOP).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ip_multicast_ttl(fd: BorrowedFd<'_>, multicast_ttl: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_TTL, multicast_ttl)
+}
+
+#[inline]
+pub(crate) fn get_ip_multicast_ttl(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_TTL)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_multicast_loop(fd: BorrowedFd<'_>, multicast_loop: bool) -> io::Result<()> {
+    setsockopt(
+        fd,
+        c::IPPROTO_IPV6,
+        c::IPV6_MULTICAST_LOOP,
+        from_bool(multicast_loop),
+    )
+}
+
+#[inline]
+pub(crate) fn get_ipv6_multicast_loop(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_MULTICAST_LOOP).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_multicast_hops(fd: BorrowedFd<'_>, multicast_hops: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IPV6_MULTICAST_HOPS, multicast_hops)
+}
+
+#[inline]
+pub(crate) fn get_ipv6_multicast_hops(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_IP, c::IPV6_MULTICAST_HOPS)
+}
+
+#[inline]
+pub(crate) fn set_ip_add_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+) -> io::Result<()> {
+    let mreq = to_ip_mreq(multiaddr, interface);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_MEMBERSHIP, mreq)
+}
+
+#[cfg(any(
+    apple,
+    freebsdlike,
+    linux_like,
+    target_os = "fuchsia",
+    target_os = "openbsd"
+))]
+#[inline]
+pub(crate) fn set_ip_add_membership_with_ifindex(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    address: &Ipv4Addr,
+    ifindex: i32,
+) -> io::Result<()> {
+    let mreqn = to_ip_mreqn(multiaddr, address, ifindex);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_MEMBERSHIP, mreqn)
+}
+
+#[cfg(any(apple, freebsdlike, linux_like, solarish, target_os = "aix"))]
+#[inline]
+pub(crate) fn set_ip_add_source_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+    sourceaddr: &Ipv4Addr,
+) -> io::Result<()> {
+    let mreq_source = to_imr_source(multiaddr, interface, sourceaddr);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_SOURCE_MEMBERSHIP, mreq_source)
+}
+
+#[cfg(any(apple, freebsdlike, linux_like, solarish, target_os = "aix"))]
+#[inline]
+pub(crate) fn set_ip_drop_source_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+    sourceaddr: &Ipv4Addr,
+) -> io::Result<()> {
+    let mreq_source = to_imr_source(multiaddr, interface, sourceaddr);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_SOURCE_MEMBERSHIP, mreq_source)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_add_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv6Addr,
+    interface: u32,
+) -> io::Result<()> {
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "nto"
+    )))]
+    use c::IPV6_ADD_MEMBERSHIP;
+    #[cfg(any(
+        bsd,
+        solarish,
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "nto"
+    ))]
+    use c::IPV6_JOIN_GROUP as IPV6_ADD_MEMBERSHIP;
+
+    let mreq = to_ipv6mr(multiaddr, interface);
+    setsockopt(fd, c::IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, mreq)
+}
+
+#[inline]
+pub(crate) fn set_ip_drop_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+) -> io::Result<()> {
+    let mreq = to_ip_mreq(multiaddr, interface);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_MEMBERSHIP, mreq)
+}
+
+#[cfg(any(
+    apple,
+    freebsdlike,
+    linux_like,
+    target_os = "fuchsia",
+    target_os = "openbsd"
+))]
+#[inline]
+pub(crate) fn set_ip_drop_membership_with_ifindex(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    address: &Ipv4Addr,
+    ifindex: i32,
+) -> io::Result<()> {
+    let mreqn = to_ip_mreqn(multiaddr, address, ifindex);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_MEMBERSHIP, mreqn)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_drop_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv6Addr,
+    interface: u32,
+) -> io::Result<()> {
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "nto"
+    )))]
+    use c::IPV6_DROP_MEMBERSHIP;
+    #[cfg(any(
+        bsd,
+        solarish,
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "nto"
+    ))]
+    use c::IPV6_LEAVE_GROUP as IPV6_DROP_MEMBERSHIP;
+
+    let mreq = to_ipv6mr(multiaddr, interface);
+    setsockopt(fd, c::IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, mreq)
+}
+
+#[inline]
+pub(crate) fn get_ipv6_unicast_hops(fd: BorrowedFd<'_>) -> io::Result<u8> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_UNICAST_HOPS).map(|hops: c::c_int| hops as u8)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_unicast_hops(fd: BorrowedFd<'_>, hops: Option<u8>) -> io::Result<()> {
+    let hops = match hops {
+        Some(hops) => hops as c::c_int,
+        None => -1,
+    };
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_UNICAST_HOPS, hops)
+}
+
+#[cfg(any(
+    bsd,
+    linux_like,
+    target_os = "aix",
+    target_os = "fuchsia",
+    target_os = "haiku",
+    target_os = "nto",
+    target_env = "newlib"
+))]
+#[inline]
+pub(crate) fn set_ip_tos(fd: BorrowedFd<'_>, value: u8) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_TOS, i32::from(value))
+}
+
+#[cfg(any(
+    bsd,
+    linux_like,
+    target_os = "aix",
+    target_os = "fuchsia",
+    target_os = "haiku",
+    target_os = "nto",
+    target_env = "newlib"
+))]
+#[inline]
+pub(crate) fn get_ip_tos(fd: BorrowedFd<'_>) -> io::Result<u8> {
+    let value: i32 = getsockopt(fd, c::IPPROTO_IP, c::IP_TOS)?;
+    Ok(value as u8)
+}
+
+#[cfg(any(apple, linux_like, target_os = "freebsd", target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn set_ip_recvtos(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_RECVTOS, from_bool(value))
+}
+
+#[cfg(any(apple, linux_like, target_os = "freebsd", target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn get_ip_recvtos(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_RECVTOS).map(to_bool)
+}
+
+#[cfg(any(
+    bsd,
+    linux_like,
+    target_os = "aix",
+    target_os = "fuchsia",
+    target_os = "nto"
+))]
+#[inline]
+pub(crate) fn set_ipv6_recvtclass(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_RECVTCLASS, from_bool(value))
+}
+
+#[cfg(any(
+    bsd,
+    linux_like,
+    target_os = "aix",
+    target_os = "fuchsia",
+    target_os = "nto"
+))]
+#[inline]
+pub(crate) fn get_ipv6_recvtclass(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_RECVTCLASS).map(to_bool)
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn set_ip_freebind(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_FREEBIND, from_bool(value))
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn get_ip_freebind(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_FREEBIND).map(to_bool)
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn set_ipv6_freebind(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_FREEBIND, from_bool(value))
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn get_ipv6_freebind(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_FREEBIND).map(to_bool)
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn get_ip_original_dst(fd: BorrowedFd<'_>) -> io::Result<SocketAddrV4> {
+    let level = c::IPPROTO_IP;
+    let optname = c::SO_ORIGINAL_DST;
+    let mut value = MaybeUninit::<SocketAddrStorage>::uninit();
+    let mut optlen = core::mem::size_of_val(&value).try_into().unwrap();
+
+    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
+
+    let any = unsafe { SocketAddrAny::read(value.as_ptr(), optlen as usize)? };
+    match any {
+        SocketAddrAny::V4(v4) => Ok(v4),
+        _ => unreachable!(),
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn get_ipv6_original_dst(fd: BorrowedFd<'_>) -> io::Result<SocketAddrV6> {
+    let level = c::IPPROTO_IPV6;
+    let optname = c::IP6T_SO_ORIGINAL_DST;
+    let mut value = MaybeUninit::<SocketAddrStorage>::uninit();
+    let mut optlen = core::mem::size_of_val(&value).try_into().unwrap();
+
+    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
+
+    let any = unsafe { SocketAddrAny::read(value.as_ptr(), optlen as usize)? };
+    match any {
+        SocketAddrAny::V6(v6) => Ok(v6),
+        _ => unreachable!(),
+    }
+}
+
+#[cfg(not(any(
+    solarish,
+    windows,
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "vita"
+)))]
+#[inline]
+pub(crate) fn set_ipv6_tclass(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_TCLASS, value)
+}
+
+#[cfg(not(any(
+    solarish,
+    windows,
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "vita"
+)))]
+#[inline]
+pub(crate) fn get_ipv6_tclass(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_TCLASS)
+}
+
+#[inline]
+pub(crate) fn set_tcp_nodelay(fd: BorrowedFd<'_>, nodelay: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_NODELAY, from_bool(nodelay))
+}
+
+#[inline]
+pub(crate) fn get_tcp_nodelay(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_NODELAY).map(to_bool)
+}
+
+#[inline]
+#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+pub(crate) fn set_tcp_keepcnt(fd: BorrowedFd<'_>, count: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPCNT, count)
+}
+
+#[inline]
+#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+pub(crate) fn get_tcp_keepcnt(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPCNT)
+}
+
+#[inline]
+#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+pub(crate) fn set_tcp_keepidle(fd: BorrowedFd<'_>, duration: Duration) -> io::Result<()> {
+    let secs: c::c_uint = duration_to_secs(duration)?;
+    setsockopt(fd, c::IPPROTO_TCP, TCP_KEEPIDLE, secs)
+}
+
+#[inline]
+#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+pub(crate) fn get_tcp_keepidle(fd: BorrowedFd<'_>) -> io::Result<Duration> {
+    let secs: c::c_uint = getsockopt(fd, c::IPPROTO_TCP, TCP_KEEPIDLE)?;
+    Ok(Duration::from_secs(secs as u64))
+}
+
+#[inline]
+#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+pub(crate) fn set_tcp_keepintvl(fd: BorrowedFd<'_>, duration: Duration) -> io::Result<()> {
+    let secs: c::c_uint = duration_to_secs(duration)?;
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPINTVL, secs)
+}
+
+#[inline]
+#[cfg(not(any(target_os = "openbsd", target_os = "haiku", target_os = "nto")))]
+pub(crate) fn get_tcp_keepintvl(fd: BorrowedFd<'_>) -> io::Result<Duration> {
+    let secs: c::c_uint = getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPINTVL)?;
+    Ok(Duration::from_secs(secs as u64))
+}
+
+#[inline]
+#[cfg(any(linux_like, target_os = "fuchsia"))]
+pub(crate) fn set_tcp_user_timeout(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_USER_TIMEOUT, value)
+}
+
+#[inline]
+#[cfg(any(linux_like, target_os = "fuchsia"))]
+pub(crate) fn get_tcp_user_timeout(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_USER_TIMEOUT)
+}
+
+#[cfg(any(linux_like, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn set_tcp_quickack(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_QUICKACK, from_bool(value))
+}
+
+#[cfg(any(linux_like, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn get_tcp_quickack(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_QUICKACK).map(to_bool)
+}
+
+#[cfg(any(
+    linux_like,
+    target_os = "freebsd",
+    target_os = "fuchsia",
+    target_os = "illumos"
+))]
+#[inline]
+pub(crate) fn set_tcp_congestion(fd: BorrowedFd<'_>, value: &str) -> io::Result<()> {
+    let level = c::IPPROTO_TCP;
+    let optname = c::TCP_CONGESTION;
+    let optlen = value.len().try_into().unwrap();
+    setsockopt_raw(fd, level, optname, value.as_ptr(), optlen)
+}
+
+#[cfg(feature = "alloc")]
+#[cfg(any(
+    linux_like,
+    target_os = "freebsd",
+    target_os = "fuchsia",
+    target_os = "illumos"
+))]
+#[inline]
+pub(crate) fn get_tcp_congestion(fd: BorrowedFd<'_>) -> io::Result<String> {
+    let level = c::IPPROTO_TCP;
+    let optname = c::TCP_CONGESTION;
+    const OPTLEN: c::socklen_t = 16;
+    let mut value = MaybeUninit::<[MaybeUninit<u8>; OPTLEN as usize]>::uninit();
+    let mut optlen = OPTLEN;
+    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
+    unsafe {
+        let value = value.assume_init();
+        let slice: &[u8] = core::mem::transmute(&value[..optlen as usize]);
+        assert!(slice.iter().any(|b| *b == b'\0'));
+        Ok(
+            core::str::from_utf8(CStr::from_ptr(slice.as_ptr().cast()).to_bytes())
+                .unwrap()
+                .to_owned(),
+        )
+    }
+}
+
+#[cfg(any(linux_like, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn set_tcp_thin_linear_timeouts(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(
+        fd,
+        c::IPPROTO_TCP,
+        c::TCP_THIN_LINEAR_TIMEOUTS,
+        from_bool(value),
+    )
+}
+
+#[cfg(any(linux_like, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn get_tcp_thin_linear_timeouts(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_THIN_LINEAR_TIMEOUTS).map(to_bool)
+}
+
+#[cfg(any(linux_like, solarish, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn set_tcp_cork(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_CORK, from_bool(value))
+}
+
+#[cfg(any(linux_like, solarish, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn get_tcp_cork(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_CORK).map(to_bool)
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn get_socket_peercred(fd: BorrowedFd<'_>) -> io::Result<UCred> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_PEERCRED)
+}
+
+#[inline]
+fn to_ip_mreq(multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> c::ip_mreq {
+    c::ip_mreq {
+        imr_multiaddr: to_imr_addr(multiaddr),
+        imr_interface: to_imr_addr(interface),
+    }
+}
+
+#[cfg(any(
+    apple,
+    freebsdlike,
+    linux_like,
+    target_os = "fuchsia",
+    target_os = "openbsd"
+))]
+#[inline]
+fn to_ip_mreqn(multiaddr: &Ipv4Addr, address: &Ipv4Addr, ifindex: i32) -> c::ip_mreqn {
+    c::ip_mreqn {
+        imr_multiaddr: to_imr_addr(multiaddr),
+        imr_address: to_imr_addr(address),
+        imr_ifindex: ifindex,
+    }
+}
+
+#[cfg(any(apple, freebsdlike, linux_like, solarish, target_os = "aix"))]
+#[inline]
+fn to_imr_source(
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+    sourceaddr: &Ipv4Addr,
+) -> c::ip_mreq_source {
+    c::ip_mreq_source {
+        imr_multiaddr: to_imr_addr(multiaddr),
+        imr_interface: to_imr_addr(interface),
+        imr_sourceaddr: to_imr_addr(sourceaddr),
+    }
+}
+
+#[inline]
+fn to_imr_addr(addr: &Ipv4Addr) -> c::in_addr {
+    in_addr_new(u32::from_ne_bytes(addr.octets()))
+}
+
+#[inline]
+fn to_ipv6mr(multiaddr: &Ipv6Addr, interface: u32) -> c::ipv6_mreq {
+    c::ipv6_mreq {
+        ipv6mr_multiaddr: to_ipv6mr_multiaddr(multiaddr),
+        ipv6mr_interface: to_ipv6mr_interface(interface),
+    }
+}
+
+#[inline]
+fn to_ipv6mr_multiaddr(multiaddr: &Ipv6Addr) -> c::in6_addr {
+    in6_addr_new(multiaddr.octets())
+}
+
+#[cfg(target_os = "android")]
+#[inline]
+fn to_ipv6mr_interface(interface: u32) -> c::c_int {
+    interface as c::c_int
+}
+
+#[cfg(not(target_os = "android"))]
+#[inline]
+fn to_ipv6mr_interface(interface: u32) -> c::c_uint {
+    interface as c::c_uint
+}
+
+// `getsockopt` and `setsockopt` represent boolean values as integers.
+#[cfg(not(windows))]
+type RawSocketBool = c::c_int;
+#[cfg(windows)]
+type RawSocketBool = BOOL;
+
+// Wrap `RawSocketBool` in a newtype to discourage misuse.
+#[repr(transparent)]
+#[derive(Copy, Clone)]
+struct SocketBool(RawSocketBool);
+
+// Convert from a `bool` to a `SocketBool`.
+#[inline]
+fn from_bool(value: bool) -> SocketBool {
+    SocketBool(value.into())
+}
+
+// Convert from a `SocketBool` to a `bool`.
+#[inline]
+fn to_bool(value: SocketBool) -> bool {
+    value.0 != 0
+}
+
+/// Convert to seconds, rounding up if necessary.
+#[inline]
+fn duration_to_secs<T: TryFrom<u64>>(duration: Duration) -> io::Result<T> {
+    let mut secs = duration.as_secs();
+    if duration.subsec_nanos() != 0 {
+        secs = secs.checked_add(1).ok_or(io::Errno::INVAL)?;
+    }
+    T::try_from(secs).map_err(|_e| io::Errno::INVAL)
+}
diff --git a/vendor/rustix/src/backend/libc/net/syscalls.rs b/vendor/rustix/src/backend/libc/net/syscalls.rs
new file mode 100644
index 0000000..48dbf1f
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/syscalls.rs
@@ -0,0 +1,568 @@
+//! libc syscalls supporting `rustix::net`.
+
+#[cfg(unix)]
+use super::addr::SocketAddrUnix;
+use crate::backend::c;
+use crate::backend::conv::{borrowed_fd, ret, ret_owned_fd, ret_send_recv, send_recv_len};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io;
+use crate::net::{SocketAddrAny, SocketAddrV4, SocketAddrV6};
+use crate::utils::as_ptr;
+use core::mem::{size_of, MaybeUninit};
+#[cfg(not(any(
+    windows,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use {
+    super::msghdr::{with_noaddr_msghdr, with_recv_msghdr, with_v4_msghdr, with_v6_msghdr},
+    crate::io::{IoSlice, IoSliceMut},
+    crate::net::{RecvAncillaryBuffer, RecvMsgReturn, SendAncillaryBuffer},
+};
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+use {
+    super::read_sockaddr::{initialize_family_to_unspec, maybe_read_sockaddr_os, read_sockaddr_os},
+    super::send_recv::{RecvFlags, SendFlags},
+    super::write_sockaddr::{encode_sockaddr_v4, encode_sockaddr_v6},
+    crate::net::{AddressFamily, Protocol, Shutdown, SocketFlags, SocketType},
+    core::ptr::null_mut,
+};
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) unsafe fn recv(
+    fd: BorrowedFd<'_>,
+    buf: *mut u8,
+    len: usize,
+    flags: RecvFlags,
+) -> io::Result<usize> {
+    ret_send_recv(c::recv(
+        borrowed_fd(fd),
+        buf.cast(),
+        send_recv_len(len),
+        bitflags_bits!(flags),
+    ))
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn send(fd: BorrowedFd<'_>, buf: &[u8], flags: SendFlags) -> io::Result<usize> {
+    unsafe {
+        ret_send_recv(c::send(
+            borrowed_fd(fd),
+            buf.as_ptr().cast(),
+            send_recv_len(buf.len()),
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) unsafe fn recvfrom(
+    fd: BorrowedFd<'_>,
+    buf: *mut u8,
+    buf_len: usize,
+    flags: RecvFlags,
+) -> io::Result<(usize, Option<SocketAddrAny>)> {
+    let mut storage = MaybeUninit::<c::sockaddr_storage>::uninit();
+    let mut len = size_of::<c::sockaddr_storage>() as c::socklen_t;
+
+    // `recvfrom` does not write to the storage if the socket is
+    // connection-oriented sockets, so we initialize the family field to
+    // `AF_UNSPEC` so that we can detect this case.
+    initialize_family_to_unspec(storage.as_mut_ptr());
+
+    ret_send_recv(c::recvfrom(
+        borrowed_fd(fd),
+        buf.cast(),
+        send_recv_len(buf_len),
+        bitflags_bits!(flags),
+        storage.as_mut_ptr().cast(),
+        &mut len,
+    ))
+    .map(|nread| {
+        (
+            nread,
+            maybe_read_sockaddr_os(storage.as_ptr(), len.try_into().unwrap()),
+        )
+    })
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn sendto_v4(
+    fd: BorrowedFd<'_>,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrV4,
+) -> io::Result<usize> {
+    unsafe {
+        ret_send_recv(c::sendto(
+            borrowed_fd(fd),
+            buf.as_ptr().cast(),
+            send_recv_len(buf.len()),
+            bitflags_bits!(flags),
+            as_ptr(&encode_sockaddr_v4(addr)).cast::<c::sockaddr>(),
+            size_of::<c::sockaddr_in>() as c::socklen_t,
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn sendto_v6(
+    fd: BorrowedFd<'_>,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrV6,
+) -> io::Result<usize> {
+    unsafe {
+        ret_send_recv(c::sendto(
+            borrowed_fd(fd),
+            buf.as_ptr().cast(),
+            send_recv_len(buf.len()),
+            bitflags_bits!(flags),
+            as_ptr(&encode_sockaddr_v6(addr)).cast::<c::sockaddr>(),
+            size_of::<c::sockaddr_in6>() as c::socklen_t,
+        ))
+    }
+}
+
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+pub(crate) fn sendto_unix(
+    fd: BorrowedFd<'_>,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrUnix,
+) -> io::Result<usize> {
+    unsafe {
+        ret_send_recv(c::sendto(
+            borrowed_fd(fd),
+            buf.as_ptr().cast(),
+            send_recv_len(buf.len()),
+            bitflags_bits!(flags),
+            as_ptr(&addr.unix).cast(),
+            addr.addr_len(),
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn socket(
+    domain: AddressFamily,
+    type_: SocketType,
+    protocol: Option<Protocol>,
+) -> io::Result<OwnedFd> {
+    let raw_protocol = match protocol {
+        Some(p) => p.0.get(),
+        None => 0,
+    };
+    unsafe {
+        ret_owned_fd(c::socket(
+            domain.0 as c::c_int,
+            type_.0 as c::c_int,
+            raw_protocol as c::c_int,
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn socket_with(
+    domain: AddressFamily,
+    type_: SocketType,
+    flags: SocketFlags,
+    protocol: Option<Protocol>,
+) -> io::Result<OwnedFd> {
+    let raw_protocol = match protocol {
+        Some(p) => p.0.get(),
+        None => 0,
+    };
+    unsafe {
+        ret_owned_fd(c::socket(
+            domain.0 as c::c_int,
+            (type_.0 | flags.bits()) as c::c_int,
+            raw_protocol as c::c_int,
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn bind_v4(sockfd: BorrowedFd<'_>, addr: &SocketAddrV4) -> io::Result<()> {
+    unsafe {
+        ret(c::bind(
+            borrowed_fd(sockfd),
+            as_ptr(&encode_sockaddr_v4(addr)).cast(),
+            size_of::<c::sockaddr_in>() as c::socklen_t,
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn bind_v6(sockfd: BorrowedFd<'_>, addr: &SocketAddrV6) -> io::Result<()> {
+    unsafe {
+        ret(c::bind(
+            borrowed_fd(sockfd),
+            as_ptr(&encode_sockaddr_v6(addr)).cast(),
+            size_of::<c::sockaddr_in6>() as c::socklen_t,
+        ))
+    }
+}
+
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+pub(crate) fn bind_unix(sockfd: BorrowedFd<'_>, addr: &SocketAddrUnix) -> io::Result<()> {
+    unsafe {
+        ret(c::bind(
+            borrowed_fd(sockfd),
+            as_ptr(&addr.unix).cast(),
+            addr.addr_len(),
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn connect_v4(sockfd: BorrowedFd<'_>, addr: &SocketAddrV4) -> io::Result<()> {
+    unsafe {
+        ret(c::connect(
+            borrowed_fd(sockfd),
+            as_ptr(&encode_sockaddr_v4(addr)).cast(),
+            size_of::<c::sockaddr_in>() as c::socklen_t,
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn connect_v6(sockfd: BorrowedFd<'_>, addr: &SocketAddrV6) -> io::Result<()> {
+    unsafe {
+        ret(c::connect(
+            borrowed_fd(sockfd),
+            as_ptr(&encode_sockaddr_v6(addr)).cast(),
+            size_of::<c::sockaddr_in6>() as c::socklen_t,
+        ))
+    }
+}
+
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+pub(crate) fn connect_unix(sockfd: BorrowedFd<'_>, addr: &SocketAddrUnix) -> io::Result<()> {
+    unsafe {
+        ret(c::connect(
+            borrowed_fd(sockfd),
+            as_ptr(&addr.unix).cast(),
+            addr.addr_len(),
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn connect_unspec(sockfd: BorrowedFd<'_>) -> io::Result<()> {
+    debug_assert_eq!(c::AF_UNSPEC, 0);
+    let addr = MaybeUninit::<c::sockaddr_storage>::zeroed();
+    unsafe {
+        ret(c::connect(
+            borrowed_fd(sockfd),
+            as_ptr(&addr).cast(),
+            size_of::<c::sockaddr_storage>() as c::socklen_t,
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn listen(sockfd: BorrowedFd<'_>, backlog: c::c_int) -> io::Result<()> {
+    unsafe { ret(c::listen(borrowed_fd(sockfd), backlog)) }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn accept(sockfd: BorrowedFd<'_>) -> io::Result<OwnedFd> {
+    unsafe {
+        let owned_fd = ret_owned_fd(c::accept(borrowed_fd(sockfd), null_mut(), null_mut()))?;
+        Ok(owned_fd)
+    }
+}
+
+#[cfg(not(any(
+    windows,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) fn recvmsg(
+    sockfd: BorrowedFd<'_>,
+    iov: &mut [IoSliceMut<'_>],
+    control: &mut RecvAncillaryBuffer<'_>,
+    msg_flags: RecvFlags,
+) -> io::Result<RecvMsgReturn> {
+    let mut storage = MaybeUninit::<c::sockaddr_storage>::uninit();
+
+    with_recv_msghdr(&mut storage, iov, control, |msghdr| {
+        let result = unsafe {
+            ret_send_recv(c::recvmsg(
+                borrowed_fd(sockfd),
+                msghdr,
+                bitflags_bits!(msg_flags),
+            ))
+        };
+
+        result.map(|bytes| {
+            // Get the address of the sender, if any.
+            let addr =
+                unsafe { maybe_read_sockaddr_os(msghdr.msg_name as _, msghdr.msg_namelen as _) };
+
+            RecvMsgReturn {
+                bytes,
+                address: addr,
+                flags: RecvFlags::from_bits_retain(bitcast!(msghdr.msg_flags)),
+            }
+        })
+    })
+}
+
+#[cfg(not(any(
+    windows,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) fn sendmsg(
+    sockfd: BorrowedFd<'_>,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    msg_flags: SendFlags,
+) -> io::Result<usize> {
+    with_noaddr_msghdr(iov, control, |msghdr| unsafe {
+        ret_send_recv(c::sendmsg(
+            borrowed_fd(sockfd),
+            &msghdr,
+            bitflags_bits!(msg_flags),
+        ))
+    })
+}
+
+#[cfg(not(any(
+    windows,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) fn sendmsg_v4(
+    sockfd: BorrowedFd<'_>,
+    addr: &SocketAddrV4,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    msg_flags: SendFlags,
+) -> io::Result<usize> {
+    with_v4_msghdr(addr, iov, control, |msghdr| unsafe {
+        ret_send_recv(c::sendmsg(
+            borrowed_fd(sockfd),
+            &msghdr,
+            bitflags_bits!(msg_flags),
+        ))
+    })
+}
+
+#[cfg(not(any(
+    windows,
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) fn sendmsg_v6(
+    sockfd: BorrowedFd<'_>,
+    addr: &SocketAddrV6,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    msg_flags: SendFlags,
+) -> io::Result<usize> {
+    with_v6_msghdr(addr, iov, control, |msghdr| unsafe {
+        ret_send_recv(c::sendmsg(
+            borrowed_fd(sockfd),
+            &msghdr,
+            bitflags_bits!(msg_flags),
+        ))
+    })
+}
+
+#[cfg(all(
+    unix,
+    not(any(target_os = "espidf", target_os = "redox", target_os = "vita"))
+))]
+pub(crate) fn sendmsg_unix(
+    sockfd: BorrowedFd<'_>,
+    addr: &SocketAddrUnix,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    msg_flags: SendFlags,
+) -> io::Result<usize> {
+    super::msghdr::with_unix_msghdr(addr, iov, control, |msghdr| unsafe {
+        ret_send_recv(c::sendmsg(
+            borrowed_fd(sockfd),
+            &msghdr,
+            bitflags_bits!(msg_flags),
+        ))
+    })
+}
+
+#[cfg(not(any(
+    apple,
+    windows,
+    target_os = "aix",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "redox",
+    target_os = "nto",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+pub(crate) fn accept_with(sockfd: BorrowedFd<'_>, flags: SocketFlags) -> io::Result<OwnedFd> {
+    unsafe {
+        let owned_fd = ret_owned_fd(c::accept4(
+            borrowed_fd(sockfd),
+            null_mut(),
+            null_mut(),
+            flags.bits() as c::c_int,
+        ))?;
+        Ok(owned_fd)
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn acceptfrom(sockfd: BorrowedFd<'_>) -> io::Result<(OwnedFd, Option<SocketAddrAny>)> {
+    unsafe {
+        let mut storage = MaybeUninit::<c::sockaddr_storage>::uninit();
+        let mut len = size_of::<c::sockaddr_storage>() as c::socklen_t;
+        let owned_fd = ret_owned_fd(c::accept(
+            borrowed_fd(sockfd),
+            storage.as_mut_ptr().cast(),
+            &mut len,
+        ))?;
+        Ok((
+            owned_fd,
+            maybe_read_sockaddr_os(storage.as_ptr(), len.try_into().unwrap()),
+        ))
+    }
+}
+
+#[cfg(not(any(
+    apple,
+    windows,
+    target_os = "aix",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+pub(crate) fn acceptfrom_with(
+    sockfd: BorrowedFd<'_>,
+    flags: SocketFlags,
+) -> io::Result<(OwnedFd, Option<SocketAddrAny>)> {
+    unsafe {
+        let mut storage = MaybeUninit::<c::sockaddr_storage>::uninit();
+        let mut len = size_of::<c::sockaddr_storage>() as c::socklen_t;
+        let owned_fd = ret_owned_fd(c::accept4(
+            borrowed_fd(sockfd),
+            storage.as_mut_ptr().cast(),
+            &mut len,
+            flags.bits() as c::c_int,
+        ))?;
+        Ok((
+            owned_fd,
+            maybe_read_sockaddr_os(storage.as_ptr(), len.try_into().unwrap()),
+        ))
+    }
+}
+
+/// Darwin lacks `accept4`, but does have `accept`. We define
+/// `SocketFlags` to have no flags, so we can discard it here.
+#[cfg(any(
+    apple,
+    windows,
+    target_os = "aix",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "vita",
+))]
+pub(crate) fn accept_with(sockfd: BorrowedFd<'_>, _flags: SocketFlags) -> io::Result<OwnedFd> {
+    accept(sockfd)
+}
+
+/// Darwin lacks `accept4`, but does have `accept`. We define
+/// `SocketFlags` to have no flags, so we can discard it here.
+#[cfg(any(
+    apple,
+    windows,
+    target_os = "aix",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "vita",
+))]
+pub(crate) fn acceptfrom_with(
+    sockfd: BorrowedFd<'_>,
+    _flags: SocketFlags,
+) -> io::Result<(OwnedFd, Option<SocketAddrAny>)> {
+    acceptfrom(sockfd)
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn shutdown(sockfd: BorrowedFd<'_>, how: Shutdown) -> io::Result<()> {
+    unsafe { ret(c::shutdown(borrowed_fd(sockfd), how as c::c_int)) }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn getsockname(sockfd: BorrowedFd<'_>) -> io::Result<SocketAddrAny> {
+    unsafe {
+        let mut storage = MaybeUninit::<c::sockaddr_storage>::uninit();
+        let mut len = size_of::<c::sockaddr_storage>() as c::socklen_t;
+        ret(c::getsockname(
+            borrowed_fd(sockfd),
+            storage.as_mut_ptr().cast(),
+            &mut len,
+        ))?;
+        Ok(read_sockaddr_os(storage.as_ptr(), len.try_into().unwrap()))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+pub(crate) fn getpeername(sockfd: BorrowedFd<'_>) -> io::Result<Option<SocketAddrAny>> {
+    unsafe {
+        let mut storage = MaybeUninit::<c::sockaddr_storage>::uninit();
+        let mut len = size_of::<c::sockaddr_storage>() as c::socklen_t;
+        ret(c::getpeername(
+            borrowed_fd(sockfd),
+            storage.as_mut_ptr().cast(),
+            &mut len,
+        ))?;
+        Ok(maybe_read_sockaddr_os(
+            storage.as_ptr(),
+            len.try_into().unwrap(),
+        ))
+    }
+}
+
+#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+pub(crate) fn socketpair(
+    domain: AddressFamily,
+    type_: SocketType,
+    flags: SocketFlags,
+    protocol: Option<Protocol>,
+) -> io::Result<(OwnedFd, OwnedFd)> {
+    let raw_protocol = match protocol {
+        Some(p) => p.0.get(),
+        None => 0,
+    };
+    unsafe {
+        let mut fds = MaybeUninit::<[OwnedFd; 2]>::uninit();
+        ret(c::socketpair(
+            c::c_int::from(domain.0),
+            (type_.0 | flags.bits()) as c::c_int,
+            raw_protocol as c::c_int,
+            fds.as_mut_ptr().cast::<c::c_int>(),
+        ))?;
+
+        let [fd0, fd1] = fds.assume_init();
+        Ok((fd0, fd1))
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/net/write_sockaddr.rs b/vendor/rustix/src/backend/libc/net/write_sockaddr.rs
new file mode 100644
index 0000000..2eee98c
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/net/write_sockaddr.rs
@@ -0,0 +1,103 @@
+//! The BSD sockets API requires us to read the `ss_family` field before we can
+//! interpret the rest of a `sockaddr` produced by the kernel.
+
+use super::addr::SocketAddrStorage;
+#[cfg(unix)]
+use super::addr::SocketAddrUnix;
+use super::ext::{in6_addr_new, in_addr_new, sockaddr_in6_new};
+use crate::backend::c;
+use crate::net::{SocketAddrAny, SocketAddrV4, SocketAddrV6};
+use core::mem::size_of;
+
+pub(crate) unsafe fn write_sockaddr(
+    addr: &SocketAddrAny,
+    storage: *mut SocketAddrStorage,
+) -> usize {
+    match addr {
+        SocketAddrAny::V4(v4) => write_sockaddr_v4(v4, storage),
+        SocketAddrAny::V6(v6) => write_sockaddr_v6(v6, storage),
+        #[cfg(unix)]
+        SocketAddrAny::Unix(unix) => write_sockaddr_unix(unix, storage),
+    }
+}
+
+pub(crate) fn encode_sockaddr_v4(v4: &SocketAddrV4) -> c::sockaddr_in {
+    c::sockaddr_in {
+        #[cfg(any(
+            bsd,
+            target_os = "aix",
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "vita",
+        ))]
+        sin_len: size_of::<c::sockaddr_in>() as _,
+        sin_family: c::AF_INET as _,
+        sin_port: u16::to_be(v4.port()),
+        sin_addr: in_addr_new(u32::from_ne_bytes(v4.ip().octets())),
+        #[cfg(not(any(target_os = "haiku", target_os = "vita")))]
+        sin_zero: [0; 8_usize],
+        #[cfg(target_os = "haiku")]
+        sin_zero: [0; 24_usize],
+        #[cfg(target_os = "vita")]
+        sin_zero: [0; 6_usize],
+        #[cfg(target_os = "vita")]
+        sin_vport: 0,
+    }
+}
+
+unsafe fn write_sockaddr_v4(v4: &SocketAddrV4, storage: *mut SocketAddrStorage) -> usize {
+    let encoded = encode_sockaddr_v4(v4);
+    core::ptr::write(storage.cast(), encoded);
+    size_of::<c::sockaddr_in>()
+}
+
+pub(crate) fn encode_sockaddr_v6(v6: &SocketAddrV6) -> c::sockaddr_in6 {
+    #[cfg(any(
+        bsd,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "vita"
+    ))]
+    {
+        sockaddr_in6_new(
+            size_of::<c::sockaddr_in6>() as _,
+            c::AF_INET6 as _,
+            u16::to_be(v6.port()),
+            u32::to_be(v6.flowinfo()),
+            in6_addr_new(v6.ip().octets()),
+            v6.scope_id(),
+        )
+    }
+    #[cfg(not(any(
+        bsd,
+        target_os = "aix",
+        target_os = "espidf",
+        target_os = "haiku",
+        target_os = "nto",
+        target_os = "vita"
+    )))]
+    {
+        sockaddr_in6_new(
+            c::AF_INET6 as _,
+            u16::to_be(v6.port()),
+            u32::to_be(v6.flowinfo()),
+            in6_addr_new(v6.ip().octets()),
+            v6.scope_id(),
+        )
+    }
+}
+
+unsafe fn write_sockaddr_v6(v6: &SocketAddrV6, storage: *mut SocketAddrStorage) -> usize {
+    let encoded = encode_sockaddr_v6(v6);
+    core::ptr::write(storage.cast(), encoded);
+    size_of::<c::sockaddr_in6>()
+}
+
+#[cfg(unix)]
+unsafe fn write_sockaddr_unix(unix: &SocketAddrUnix, storage: *mut SocketAddrStorage) -> usize {
+    core::ptr::write(storage.cast(), unix.unix);
+    unix.len()
+}
diff --git a/vendor/rustix/src/backend/libc/param/auxv.rs b/vendor/rustix/src/backend/libc/param/auxv.rs
new file mode 100644
index 0000000..880a1d4
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/param/auxv.rs
@@ -0,0 +1,54 @@
+use crate::backend::c;
+#[cfg(any(
+    all(target_os = "android", target_pointer_width = "64"),
+    target_os = "linux",
+))]
+use crate::ffi::CStr;
+
+// `getauxval` wasn't supported in glibc until 2.16.
+#[cfg(any(
+    all(target_os = "android", target_pointer_width = "64"),
+    target_os = "linux",
+))]
+weak!(fn getauxval(c::c_ulong) -> *mut c::c_void);
+
+#[inline]
+pub(crate) fn page_size() -> usize {
+    unsafe { c::sysconf(c::_SC_PAGESIZE) as usize }
+}
+
+#[cfg(not(any(target_os = "vita", target_os = "wasi")))]
+#[inline]
+pub(crate) fn clock_ticks_per_second() -> u64 {
+    unsafe { c::sysconf(c::_SC_CLK_TCK) as u64 }
+}
+
+#[cfg(any(
+    all(target_os = "android", target_pointer_width = "64"),
+    target_os = "linux",
+))]
+#[inline]
+pub(crate) fn linux_hwcap() -> (usize, usize) {
+    if let Some(libc_getauxval) = getauxval.get() {
+        unsafe {
+            let hwcap = libc_getauxval(c::AT_HWCAP) as usize;
+            let hwcap2 = libc_getauxval(c::AT_HWCAP2) as usize;
+            (hwcap, hwcap2)
+        }
+    } else {
+        (0, 0)
+    }
+}
+
+#[cfg(any(
+    all(target_os = "android", target_pointer_width = "64"),
+    target_os = "linux",
+))]
+#[inline]
+pub(crate) fn linux_execfn() -> &'static CStr {
+    if let Some(libc_getauxval) = getauxval.get() {
+        unsafe { CStr::from_ptr(libc_getauxval(c::AT_EXECFN).cast()) }
+    } else {
+        cstr!("")
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/param/mod.rs b/vendor/rustix/src/backend/libc/param/mod.rs
new file mode 100644
index 0000000..2cb2fe7
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/param/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod auxv;
diff --git a/vendor/rustix/src/backend/libc/pid/mod.rs b/vendor/rustix/src/backend/libc/pid/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/pid/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/libc/pid/syscalls.rs b/vendor/rustix/src/backend/libc/pid/syscalls.rs
new file mode 100644
index 0000000..d0ed4bc
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/pid/syscalls.rs
@@ -0,0 +1,14 @@
+//! libc syscalls for PIDs
+
+use crate::backend::c;
+use crate::pid::Pid;
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+#[must_use]
+pub(crate) fn getpid() -> Pid {
+    unsafe {
+        let pid = c::getpid();
+        Pid::from_raw_unchecked(pid)
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/pipe/mod.rs b/vendor/rustix/src/backend/libc/pipe/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/pipe/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/libc/pipe/syscalls.rs b/vendor/rustix/src/backend/libc/pipe/syscalls.rs
new file mode 100644
index 0000000..cff932d
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/pipe/syscalls.rs
@@ -0,0 +1,125 @@
+use crate::backend::c;
+use crate::backend::conv::ret;
+use crate::fd::OwnedFd;
+use crate::io;
+#[cfg(not(any(
+    apple,
+    target_os = "aix",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "wasi"
+)))]
+use crate::pipe::PipeFlags;
+use core::mem::MaybeUninit;
+#[cfg(linux_kernel)]
+use {
+    crate::backend::conv::{borrowed_fd, ret_c_int, ret_usize},
+    crate::backend::MAX_IOV,
+    crate::fd::BorrowedFd,
+    crate::pipe::{IoSliceRaw, SpliceFlags},
+    crate::utils::option_as_mut_ptr,
+    core::cmp::min,
+};
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn pipe() -> io::Result<(OwnedFd, OwnedFd)> {
+    unsafe {
+        let mut result = MaybeUninit::<[OwnedFd; 2]>::uninit();
+        ret(c::pipe(result.as_mut_ptr().cast::<i32>()))?;
+        let [p0, p1] = result.assume_init();
+        Ok((p0, p1))
+    }
+}
+
+#[cfg(not(any(
+    apple,
+    target_os = "aix",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "nto",
+    target_os = "wasi"
+)))]
+pub(crate) fn pipe_with(flags: PipeFlags) -> io::Result<(OwnedFd, OwnedFd)> {
+    unsafe {
+        let mut result = MaybeUninit::<[OwnedFd; 2]>::uninit();
+        ret(c::pipe2(
+            result.as_mut_ptr().cast::<i32>(),
+            bitflags_bits!(flags),
+        ))?;
+        let [p0, p1] = result.assume_init();
+        Ok((p0, p1))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub fn splice(
+    fd_in: BorrowedFd<'_>,
+    off_in: Option<&mut u64>,
+    fd_out: BorrowedFd<'_>,
+    off_out: Option<&mut u64>,
+    len: usize,
+    flags: SpliceFlags,
+) -> io::Result<usize> {
+    let off_in = option_as_mut_ptr(off_in).cast();
+    let off_out = option_as_mut_ptr(off_out).cast();
+
+    unsafe {
+        ret_usize(c::splice(
+            borrowed_fd(fd_in),
+            off_in,
+            borrowed_fd(fd_out),
+            off_out,
+            len,
+            flags.bits(),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub unsafe fn vmsplice(
+    fd: BorrowedFd<'_>,
+    bufs: &[IoSliceRaw<'_>],
+    flags: SpliceFlags,
+) -> io::Result<usize> {
+    ret_usize(c::vmsplice(
+        borrowed_fd(fd),
+        bufs.as_ptr().cast::<c::iovec>(),
+        min(bufs.len(), MAX_IOV),
+        flags.bits(),
+    ))
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub fn tee(
+    fd_in: BorrowedFd<'_>,
+    fd_out: BorrowedFd<'_>,
+    len: usize,
+    flags: SpliceFlags,
+) -> io::Result<usize> {
+    unsafe {
+        ret_usize(c::tee(
+            borrowed_fd(fd_in),
+            borrowed_fd(fd_out),
+            len,
+            flags.bits(),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn fcntl_getpipe_sz(fd: BorrowedFd<'_>) -> io::Result<usize> {
+    unsafe { ret_c_int(c::fcntl(borrowed_fd(fd), c::F_GETPIPE_SZ)).map(|size| size as usize) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn fcntl_setpipe_sz(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> {
+    let size: c::c_int = size.try_into().map_err(|_| io::Errno::PERM)?;
+
+    unsafe { ret(c::fcntl(borrowed_fd(fd), c::F_SETPIPE_SZ, size)) }
+}
diff --git a/vendor/rustix/src/backend/libc/pipe/types.rs b/vendor/rustix/src/backend/libc/pipe/types.rs
new file mode 100644
index 0000000..78fc2fc
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/pipe/types.rs
@@ -0,0 +1,103 @@
+#[cfg(linux_kernel)]
+use core::marker::PhantomData;
+#[cfg(not(any(apple, target_os = "wasi")))]
+use {crate::backend::c, bitflags::bitflags};
+
+#[cfg(not(any(apple, target_os = "wasi")))]
+bitflags! {
+    /// `O_*` constants for use with [`pipe_with`].
+    ///
+    /// [`pipe_with`]: crate::pipe::pipe_with
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct PipeFlags: u32 {
+        /// `O_CLOEXEC`
+        const CLOEXEC = bitcast!(c::O_CLOEXEC);
+        /// `O_DIRECT`
+        #[cfg(not(any(
+            solarish,
+            target_os = "espidf",
+            target_os = "haiku",
+            target_os = "nto",
+            target_os = "openbsd",
+            target_os = "redox",
+            target_os = "vita",
+        )))]
+        const DIRECT = bitcast!(c::O_DIRECT);
+        /// `O_NONBLOCK`
+        const NONBLOCK = bitcast!(c::O_NONBLOCK);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `SPLICE_F_*` constants for use with [`splice`], [`vmsplice`], and
+    /// [`tee`].
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct SpliceFlags: c::c_uint {
+        /// `SPLICE_F_MOVE`
+        const MOVE = c::SPLICE_F_MOVE;
+        /// `SPLICE_F_NONBLOCK`
+        const NONBLOCK = c::SPLICE_F_NONBLOCK;
+        /// `SPLICE_F_MORE`
+        const MORE = c::SPLICE_F_MORE;
+        /// `SPLICE_F_GIFT`
+        const GIFT = c::SPLICE_F_GIFT;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// A buffer type for use with [`vmsplice`].
+///
+/// It is guaranteed to be ABI compatible with the iovec type on Unix platforms
+/// and `WSABUF` on Windows. Unlike `IoSlice` and `IoSliceMut` it is
+/// semantically like a raw pointer, and therefore can be shared or mutated as
+/// needed.
+///
+/// [`vmsplice`]: crate::pipe::vmsplice
+#[cfg(linux_kernel)]
+#[repr(transparent)]
+pub struct IoSliceRaw<'a> {
+    _buf: c::iovec,
+    _lifetime: PhantomData<&'a ()>,
+}
+
+#[cfg(linux_kernel)]
+impl<'a> IoSliceRaw<'a> {
+    /// Creates a new `IoSlice` wrapping a byte slice.
+    pub fn from_slice(buf: &'a [u8]) -> Self {
+        IoSliceRaw {
+            _buf: c::iovec {
+                iov_base: buf.as_ptr() as *mut u8 as *mut c::c_void,
+                iov_len: buf.len() as _,
+            },
+            _lifetime: PhantomData,
+        }
+    }
+
+    /// Creates a new `IoSlice` wrapping a mutable byte slice.
+    pub fn from_slice_mut(buf: &'a mut [u8]) -> Self {
+        IoSliceRaw {
+            _buf: c::iovec {
+                iov_base: buf.as_mut_ptr() as *mut c::c_void,
+                iov_len: buf.len() as _,
+            },
+            _lifetime: PhantomData,
+        }
+    }
+}
+
+#[cfg(not(any(apple, target_os = "wasi")))]
+#[test]
+fn test_types() {
+    assert_eq_size!(PipeFlags, c::c_int);
+
+    #[cfg(linux_kernel)]
+    assert_eq_size!(SpliceFlags, c::c_int);
+}
diff --git a/vendor/rustix/src/backend/libc/prctl/mod.rs b/vendor/rustix/src/backend/libc/prctl/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/prctl/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/libc/prctl/syscalls.rs b/vendor/rustix/src/backend/libc/prctl/syscalls.rs
new file mode 100644
index 0000000..451cecc
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/prctl/syscalls.rs
@@ -0,0 +1,14 @@
+use crate::backend::c;
+use crate::backend::conv::ret_c_int;
+use crate::io;
+
+#[inline]
+pub(crate) unsafe fn prctl(
+    option: c::c_int,
+    arg2: *mut c::c_void,
+    arg3: *mut c::c_void,
+    arg4: *mut c::c_void,
+    arg5: *mut c::c_void,
+) -> io::Result<c::c_int> {
+    ret_c_int(c::prctl(option, arg2, arg3, arg4, arg5))
+}
diff --git a/vendor/rustix/src/backend/libc/process/cpu_set.rs b/vendor/rustix/src/backend/libc/process/cpu_set.rs
new file mode 100644
index 0000000..4cf06b9
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/process/cpu_set.rs
@@ -0,0 +1,50 @@
+//! Rust implementation of the `CPU_*` macro API.
+
+#![allow(non_snake_case)]
+
+use super::types::{RawCpuSet, CPU_SETSIZE};
+use crate::backend::c;
+
+#[inline]
+pub(crate) fn CPU_SET(cpu: usize, cpuset: &mut RawCpuSet) {
+    assert!(
+        cpu < CPU_SETSIZE,
+        "cpu out of bounds: the cpu max is {} but the cpu is {}",
+        CPU_SETSIZE,
+        cpu
+    );
+    unsafe { c::CPU_SET(cpu, cpuset) }
+}
+
+#[inline]
+pub(crate) fn CPU_ZERO(cpuset: &mut RawCpuSet) {
+    unsafe { c::CPU_ZERO(cpuset) }
+}
+
+#[inline]
+pub(crate) fn CPU_CLR(cpu: usize, cpuset: &mut RawCpuSet) {
+    assert!(
+        cpu < CPU_SETSIZE,
+        "cpu out of bounds: the cpu max is {} but the cpu is {}",
+        CPU_SETSIZE,
+        cpu
+    );
+    unsafe { c::CPU_CLR(cpu, cpuset) }
+}
+
+#[inline]
+pub(crate) fn CPU_ISSET(cpu: usize, cpuset: &RawCpuSet) -> bool {
+    assert!(
+        cpu < CPU_SETSIZE,
+        "cpu out of bounds: the cpu max is {} but the cpu is {}",
+        CPU_SETSIZE,
+        cpu
+    );
+    unsafe { c::CPU_ISSET(cpu, cpuset) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn CPU_COUNT(cpuset: &RawCpuSet) -> u32 {
+    unsafe { c::CPU_COUNT(cpuset).try_into().unwrap() }
+}
diff --git a/vendor/rustix/src/backend/libc/process/mod.rs b/vendor/rustix/src/backend/libc/process/mod.rs
new file mode 100644
index 0000000..39803b5
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/process/mod.rs
@@ -0,0 +1,7 @@
+#[cfg(any(freebsdlike, linux_kernel, target_os = "fuchsia"))]
+pub(crate) mod cpu_set;
+#[cfg(not(windows))]
+pub(crate) mod syscalls;
+pub(crate) mod types;
+#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+pub(crate) mod wait;
diff --git a/vendor/rustix/src/backend/libc/process/syscalls.rs b/vendor/rustix/src/backend/libc/process/syscalls.rs
new file mode 100644
index 0000000..46fd182
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/process/syscalls.rs
@@ -0,0 +1,713 @@
+//! libc syscalls supporting `rustix::process`.
+
+#[cfg(any(freebsdlike, linux_kernel, target_os = "fuchsia"))]
+use super::types::RawCpuSet;
+use crate::backend::c;
+#[cfg(not(any(target_os = "wasi", target_os = "fuchsia")))]
+use crate::backend::conv::borrowed_fd;
+#[cfg(feature = "fs")]
+use crate::backend::conv::c_str;
+#[cfg(all(feature = "alloc", feature = "fs", not(target_os = "wasi")))]
+use crate::backend::conv::ret_discarded_char_ptr;
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use crate::backend::conv::ret_infallible;
+#[cfg(not(target_os = "wasi"))]
+use crate::backend::conv::ret_pid_t;
+#[cfg(linux_kernel)]
+use crate::backend::conv::ret_u32;
+#[cfg(all(feature = "alloc", not(target_os = "wasi")))]
+use crate::backend::conv::ret_usize;
+use crate::backend::conv::{ret, ret_c_int};
+#[cfg(not(any(target_os = "wasi", target_os = "fuchsia")))]
+use crate::fd::BorrowedFd;
+#[cfg(target_os = "linux")]
+use crate::fd::{AsRawFd, OwnedFd, RawFd};
+#[cfg(feature = "fs")]
+use crate::ffi::CStr;
+#[cfg(feature = "fs")]
+use crate::fs::Mode;
+use crate::io;
+#[cfg(all(feature = "alloc", not(target_os = "wasi")))]
+use crate::process::Gid;
+#[cfg(not(target_os = "wasi"))]
+use crate::process::Pid;
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+use crate::process::Signal;
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use crate::process::Uid;
+#[cfg(linux_kernel)]
+use crate::process::{Cpuid, MembarrierCommand, MembarrierQuery};
+#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+use crate::process::{RawPid, WaitOptions, WaitStatus};
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use crate::process::{Resource, Rlimit};
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "openbsd",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use crate::process::{WaitId, WaitidOptions, WaitidStatus};
+use core::mem::MaybeUninit;
+#[cfg(target_os = "linux")]
+use {
+    super::super::conv::ret_owned_fd, crate::process::PidfdFlags, crate::process::PidfdGetfdFlags,
+};
+
+#[cfg(any(linux_kernel, target_os = "dragonfly"))]
+#[inline]
+pub(crate) fn sched_getcpu() -> usize {
+    let r = unsafe { libc::sched_getcpu() };
+    debug_assert!(r >= 0);
+    r as usize
+}
+
+#[cfg(feature = "fs")]
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn chdir(path: &CStr) -> io::Result<()> {
+    unsafe { ret(c::chdir(c_str(path))) }
+}
+
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+pub(crate) fn fchdir(dirfd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(c::fchdir(borrowed_fd(dirfd))) }
+}
+
+#[cfg(feature = "fs")]
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+pub(crate) fn chroot(path: &CStr) -> io::Result<()> {
+    unsafe { ret(c::chroot(c_str(path))) }
+}
+
+#[cfg(all(feature = "alloc", feature = "fs"))]
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn getcwd(buf: &mut [MaybeUninit<u8>]) -> io::Result<()> {
+    unsafe { ret_discarded_char_ptr(c::getcwd(buf.as_mut_ptr().cast(), buf.len())) }
+}
+
+// The `membarrier` syscall has a third argument, but it's only used when
+// the `flags` argument is `MEMBARRIER_CMD_FLAG_CPU`.
+#[cfg(linux_kernel)]
+syscall! {
+    fn membarrier_all(
+        cmd: c::c_int,
+        flags: c::c_uint
+    ) via SYS_membarrier -> c::c_int
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn membarrier_query() -> MembarrierQuery {
+    // glibc does not have a wrapper for `membarrier`; [the documentation]
+    // says to use `syscall`.
+    //
+    // [the documentation]: https://man7.org/linux/man-pages/man2/membarrier.2.html#NOTES
+    const MEMBARRIER_CMD_QUERY: u32 = 0;
+    unsafe {
+        match ret_u32(membarrier_all(MEMBARRIER_CMD_QUERY as i32, 0)) {
+            Ok(query) => MembarrierQuery::from_bits_retain(query),
+            Err(_) => MembarrierQuery::empty(),
+        }
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn membarrier(cmd: MembarrierCommand) -> io::Result<()> {
+    unsafe { ret(membarrier_all(cmd as i32, 0)) }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn membarrier_cpu(cmd: MembarrierCommand, cpu: Cpuid) -> io::Result<()> {
+    const MEMBARRIER_CMD_FLAG_CPU: u32 = 1;
+
+    syscall! {
+        fn membarrier_cpu(
+            cmd: c::c_int,
+            flags: c::c_uint,
+            cpu_id: c::c_int
+        ) via SYS_membarrier -> c::c_int
+    }
+
+    unsafe {
+        ret(membarrier_cpu(
+            cmd as i32,
+            MEMBARRIER_CMD_FLAG_CPU,
+            bitcast!(cpu.as_raw()),
+        ))
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+#[must_use]
+pub(crate) fn getppid() -> Option<Pid> {
+    unsafe {
+        let pid: i32 = c::getppid();
+        Pid::from_raw(pid)
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+pub(crate) fn getpgid(pid: Option<Pid>) -> io::Result<Pid> {
+    unsafe {
+        let pgid = ret_pid_t(c::getpgid(Pid::as_raw(pid) as _))?;
+        Ok(Pid::from_raw_unchecked(pgid))
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+pub(crate) fn setpgid(pid: Option<Pid>, pgid: Option<Pid>) -> io::Result<()> {
+    unsafe { ret(c::setpgid(Pid::as_raw(pid) as _, Pid::as_raw(pgid) as _)) }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+#[must_use]
+pub(crate) fn getpgrp() -> Pid {
+    unsafe {
+        let pgid = c::getpgrp();
+        Pid::from_raw_unchecked(pgid)
+    }
+}
+
+#[cfg(any(freebsdlike, linux_kernel, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn sched_getaffinity(pid: Option<Pid>, cpuset: &mut RawCpuSet) -> io::Result<()> {
+    unsafe {
+        ret(c::sched_getaffinity(
+            Pid::as_raw(pid) as _,
+            core::mem::size_of::<RawCpuSet>(),
+            cpuset,
+        ))
+    }
+}
+
+#[cfg(any(freebsdlike, linux_kernel, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn sched_setaffinity(pid: Option<Pid>, cpuset: &RawCpuSet) -> io::Result<()> {
+    unsafe {
+        ret(c::sched_setaffinity(
+            Pid::as_raw(pid) as _,
+            core::mem::size_of::<RawCpuSet>(),
+            cpuset,
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn sched_yield() {
+    unsafe {
+        let _ = c::sched_yield();
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[cfg(feature = "fs")]
+#[inline]
+pub(crate) fn umask(mask: Mode) -> Mode {
+    unsafe { Mode::from_bits_retain(c::umask(mask.bits() as c::mode_t).into()) }
+}
+
+#[cfg(not(any(target_os = "fuchsia", target_os = "vita", target_os = "wasi")))]
+#[inline]
+pub(crate) fn nice(inc: i32) -> io::Result<i32> {
+    libc_errno::set_errno(libc_errno::Errno(0));
+    let r = unsafe { c::nice(inc) };
+    if libc_errno::errno().0 != 0 {
+        ret_c_int(r)
+    } else {
+        Ok(r)
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn getpriority_user(uid: Uid) -> io::Result<i32> {
+    libc_errno::set_errno(libc_errno::Errno(0));
+    let r = unsafe { c::getpriority(c::PRIO_USER, uid.as_raw() as _) };
+    if libc_errno::errno().0 != 0 {
+        ret_c_int(r)
+    } else {
+        Ok(r)
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn getpriority_pgrp(pgid: Option<Pid>) -> io::Result<i32> {
+    libc_errno::set_errno(libc_errno::Errno(0));
+    let r = unsafe { c::getpriority(c::PRIO_PGRP, Pid::as_raw(pgid) as _) };
+    if libc_errno::errno().0 != 0 {
+        ret_c_int(r)
+    } else {
+        Ok(r)
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn getpriority_process(pid: Option<Pid>) -> io::Result<i32> {
+    libc_errno::set_errno(libc_errno::Errno(0));
+    let r = unsafe { c::getpriority(c::PRIO_PROCESS, Pid::as_raw(pid) as _) };
+    if libc_errno::errno().0 != 0 {
+        ret_c_int(r)
+    } else {
+        Ok(r)
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn setpriority_user(uid: Uid, priority: i32) -> io::Result<()> {
+    unsafe { ret(c::setpriority(c::PRIO_USER, uid.as_raw() as _, priority)) }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn setpriority_pgrp(pgid: Option<Pid>, priority: i32) -> io::Result<()> {
+    unsafe {
+        ret(c::setpriority(
+            c::PRIO_PGRP,
+            Pid::as_raw(pgid) as _,
+            priority,
+        ))
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn setpriority_process(pid: Option<Pid>, priority: i32) -> io::Result<()> {
+    unsafe {
+        ret(c::setpriority(
+            c::PRIO_PROCESS,
+            Pid::as_raw(pid) as _,
+            priority,
+        ))
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn getrlimit(limit: Resource) -> Rlimit {
+    let mut result = MaybeUninit::<c::rlimit>::uninit();
+    unsafe {
+        ret_infallible(c::getrlimit(limit as _, result.as_mut_ptr()));
+        rlimit_from_libc(result.assume_init())
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn setrlimit(limit: Resource, new: Rlimit) -> io::Result<()> {
+    let lim = rlimit_to_libc(new)?;
+    unsafe { ret(c::setrlimit(limit as _, &lim)) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn prlimit(pid: Option<Pid>, limit: Resource, new: Rlimit) -> io::Result<Rlimit> {
+    let lim = rlimit_to_libc(new)?;
+    let mut result = MaybeUninit::<c::rlimit>::uninit();
+    unsafe {
+        ret(c::prlimit(
+            Pid::as_raw(pid),
+            limit as _,
+            &lim,
+            result.as_mut_ptr(),
+        ))?;
+        Ok(rlimit_from_libc(result.assume_init()))
+    }
+}
+
+/// Convert a Rust [`Rlimit`] to a C `c::rlimit`.
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+fn rlimit_from_libc(lim: c::rlimit) -> Rlimit {
+    let current = if lim.rlim_cur == c::RLIM_INFINITY {
+        None
+    } else {
+        Some(lim.rlim_cur.try_into().unwrap())
+    };
+    let maximum = if lim.rlim_max == c::RLIM_INFINITY {
+        None
+    } else {
+        Some(lim.rlim_max.try_into().unwrap())
+    };
+    Rlimit { current, maximum }
+}
+
+/// Convert a C `c::rlimit` to a Rust `Rlimit`.
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+fn rlimit_to_libc(lim: Rlimit) -> io::Result<c::rlimit> {
+    let Rlimit { current, maximum } = lim;
+    let rlim_cur = match current {
+        Some(r) => r.try_into().map_err(|_e| io::Errno::INVAL)?,
+        None => c::RLIM_INFINITY as _,
+    };
+    let rlim_max = match maximum {
+        Some(r) => r.try_into().map_err(|_e| io::Errno::INVAL)?,
+        None => c::RLIM_INFINITY as _,
+    };
+    Ok(c::rlimit { rlim_cur, rlim_max })
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+#[inline]
+pub(crate) fn wait(waitopts: WaitOptions) -> io::Result<Option<(Pid, WaitStatus)>> {
+    _waitpid(!0, waitopts)
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+#[inline]
+pub(crate) fn waitpid(
+    pid: Option<Pid>,
+    waitopts: WaitOptions,
+) -> io::Result<Option<(Pid, WaitStatus)>> {
+    _waitpid(Pid::as_raw(pid), waitopts)
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+#[inline]
+pub(crate) fn waitpgid(pgid: Pid, waitopts: WaitOptions) -> io::Result<Option<(Pid, WaitStatus)>> {
+    _waitpid(-pgid.as_raw_nonzero().get(), waitopts)
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+#[inline]
+pub(crate) fn _waitpid(
+    pid: RawPid,
+    waitopts: WaitOptions,
+) -> io::Result<Option<(Pid, WaitStatus)>> {
+    unsafe {
+        let mut status: c::c_int = 0;
+        let pid = ret_c_int(c::waitpid(pid as _, &mut status, waitopts.bits() as _))?;
+        Ok(Pid::from_raw(pid).map(|pid| (pid, WaitStatus::new(status as _))))
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "openbsd",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+pub(crate) fn waitid(id: WaitId<'_>, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // Get the id to wait on.
+    match id {
+        WaitId::All => _waitid_all(options),
+        WaitId::Pid(pid) => _waitid_pid(pid, options),
+        WaitId::Pgid(pgid) => _waitid_pgid(pgid, options),
+        #[cfg(target_os = "linux")]
+        WaitId::PidFd(fd) => _waitid_pidfd(fd, options),
+        #[cfg(not(target_os = "linux"))]
+        WaitId::__EatLifetime(_) => unreachable!(),
+    }
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "openbsd",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+fn _waitid_all(options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // `waitid` can return successfully without initializing the struct (no
+    // children found when using `WNOHANG`)
+    let mut status = MaybeUninit::<c::siginfo_t>::zeroed();
+    unsafe {
+        ret(c::waitid(
+            c::P_ALL,
+            0,
+            status.as_mut_ptr(),
+            options.bits() as _,
+        ))?
+    };
+
+    Ok(unsafe { cvt_waitid_status(status) })
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "openbsd",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+fn _waitid_pid(pid: Pid, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // `waitid` can return successfully without initializing the struct (no
+    // children found when using `WNOHANG`)
+    let mut status = MaybeUninit::<c::siginfo_t>::zeroed();
+    unsafe {
+        ret(c::waitid(
+            c::P_PID,
+            Pid::as_raw(Some(pid)) as _,
+            status.as_mut_ptr(),
+            options.bits() as _,
+        ))?
+    };
+
+    Ok(unsafe { cvt_waitid_status(status) })
+}
+
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "openbsd",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+fn _waitid_pgid(pgid: Option<Pid>, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // `waitid` can return successfully without initializing the struct (no
+    // children found when using `WNOHANG`)
+    let mut status = MaybeUninit::<c::siginfo_t>::zeroed();
+    unsafe {
+        ret(c::waitid(
+            c::P_PGID,
+            Pid::as_raw(pgid) as _,
+            status.as_mut_ptr(),
+            options.bits() as _,
+        ))?
+    };
+
+    Ok(unsafe { cvt_waitid_status(status) })
+}
+
+#[cfg(target_os = "linux")]
+#[inline]
+fn _waitid_pidfd(fd: BorrowedFd<'_>, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // `waitid` can return successfully without initializing the struct (no
+    // children found when using `WNOHANG`)
+    let mut status = MaybeUninit::<c::siginfo_t>::zeroed();
+    unsafe {
+        ret(c::waitid(
+            c::P_PIDFD,
+            fd.as_raw_fd() as _,
+            status.as_mut_ptr(),
+            options.bits() as _,
+        ))?
+    };
+
+    Ok(unsafe { cvt_waitid_status(status) })
+}
+
+/// Convert a `siginfo_t` to a `WaitidStatus`.
+///
+/// # Safety
+///
+/// The caller must ensure that `status` is initialized and that `waitid`
+/// returned successfully.
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "openbsd",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[inline]
+unsafe fn cvt_waitid_status(status: MaybeUninit<c::siginfo_t>) -> Option<WaitidStatus> {
+    let status = status.assume_init();
+    // `si_pid` is supposedly the better way to check that the struct has been
+    // filled, e.g. the Linux manpage says about the `WNOHANG` case “zero out
+    // the si_pid field before the call and check for a nonzero value”.
+    // But e.g. NetBSD/OpenBSD don't have it exposed in the libc crate for now,
+    // and some platforms don't have it at all. For simplicity, always check
+    // `si_signo`. We have zero-initialized the whole struct, and all kernels
+    // should set `SIGCHLD` here.
+    if status.si_signo == 0 {
+        None
+    } else {
+        Some(WaitidStatus(status))
+    }
+}
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+#[inline]
+pub(crate) fn getsid(pid: Option<Pid>) -> io::Result<Pid> {
+    unsafe {
+        let pid = ret_pid_t(c::getsid(Pid::as_raw(pid) as _))?;
+        Ok(Pid::from_raw_unchecked(pid))
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+pub(crate) fn setsid() -> io::Result<Pid> {
+    unsafe {
+        let pid = ret_c_int(c::setsid())?;
+        Ok(Pid::from_raw_unchecked(pid))
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+#[inline]
+pub(crate) fn kill_process(pid: Pid, sig: Signal) -> io::Result<()> {
+    unsafe { ret(c::kill(pid.as_raw_nonzero().get(), sig as i32)) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+#[inline]
+pub(crate) fn kill_process_group(pid: Pid, sig: Signal) -> io::Result<()> {
+    unsafe {
+        ret(c::kill(
+            pid.as_raw_nonzero().get().wrapping_neg(),
+            sig as i32,
+        ))
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+#[inline]
+pub(crate) fn kill_current_process_group(sig: Signal) -> io::Result<()> {
+    unsafe { ret(c::kill(0, sig as i32)) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn test_kill_process(pid: Pid) -> io::Result<()> {
+    unsafe { ret(c::kill(pid.as_raw_nonzero().get(), 0)) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+#[inline]
+pub(crate) fn test_kill_process_group(pid: Pid) -> io::Result<()> {
+    unsafe { ret(c::kill(pid.as_raw_nonzero().get().wrapping_neg(), 0)) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+#[inline]
+pub(crate) fn test_kill_current_process_group() -> io::Result<()> {
+    unsafe { ret(c::kill(0, 0)) }
+}
+
+#[cfg(freebsdlike)]
+#[inline]
+pub(crate) unsafe fn procctl(
+    idtype: c::idtype_t,
+    id: c::id_t,
+    option: c::c_int,
+    data: *mut c::c_void,
+) -> io::Result<()> {
+    ret(c::procctl(idtype, id, option, data))
+}
+
+#[cfg(target_os = "linux")]
+pub(crate) fn pidfd_open(pid: Pid, flags: PidfdFlags) -> io::Result<OwnedFd> {
+    syscall! {
+        fn pidfd_open(
+            pid: c::pid_t,
+            flags: c::c_uint
+        ) via SYS_pidfd_open -> c::c_int
+    }
+    unsafe {
+        ret_owned_fd(pidfd_open(
+            pid.as_raw_nonzero().get(),
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(target_os = "linux")]
+pub(crate) fn pidfd_getfd(
+    pidfd: BorrowedFd<'_>,
+    targetfd: RawFd,
+    flags: PidfdGetfdFlags,
+) -> io::Result<OwnedFd> {
+    syscall! {
+        fn pidfd_getfd(
+            pidfd: c::c_int,
+            targetfd: c::c_int,
+            flags: c::c_uint
+        ) via SYS_pidfd_getfd -> c::c_int
+    }
+    unsafe {
+        ret_owned_fd(pidfd_getfd(
+            borrowed_fd(pidfd),
+            targetfd,
+            bitflags_bits!(flags),
+        ))
+    }
+}
+
+#[cfg(all(feature = "alloc", not(target_os = "wasi")))]
+pub(crate) fn getgroups(buf: &mut [Gid]) -> io::Result<usize> {
+    let len = buf.len().try_into().map_err(|_| io::Errno::NOMEM)?;
+
+    unsafe { ret_usize(c::getgroups(len, buf.as_mut_ptr().cast()) as isize) }
+}
diff --git a/vendor/rustix/src/backend/libc/process/types.rs b/vendor/rustix/src/backend/libc/process/types.rs
new file mode 100644
index 0000000..f914128
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/process/types.rs
@@ -0,0 +1,172 @@
+#[cfg(not(any(target_os = "espidf", target_os = "vita")))]
+use crate::backend::c;
+
+/// A command for use with [`membarrier`] and [`membarrier_cpu`].
+///
+/// For `MEMBARRIER_CMD_QUERY`, see [`membarrier_query`].
+///
+/// [`membarrier`]: crate::process::membarrier
+/// [`membarrier_cpu`]: crate::process::membarrier_cpu
+/// [`membarrier_query`]: crate::process::membarrier_query
+#[cfg(linux_kernel)]
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+#[repr(u32)]
+pub enum MembarrierCommand {
+    /// `MEMBARRIER_CMD_GLOBAL`
+    #[doc(alias = "Shared")]
+    #[doc(alias = "MEMBARRIER_CMD_SHARED")]
+    Global = c::MEMBARRIER_CMD_GLOBAL as u32,
+    /// `MEMBARRIER_CMD_GLOBAL_EXPEDITED`
+    GlobalExpedited = c::MEMBARRIER_CMD_GLOBAL_EXPEDITED as u32,
+    /// `MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED`
+    RegisterGlobalExpedited = c::MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED as u32,
+    /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED`
+    PrivateExpedited = c::MEMBARRIER_CMD_PRIVATE_EXPEDITED as u32,
+    /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED`
+    RegisterPrivateExpedited = c::MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED as u32,
+    /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE`
+    PrivateExpeditedSyncCore = c::MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE as u32,
+    /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE`
+    RegisterPrivateExpeditedSyncCore =
+        c::MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE as u32,
+    /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ` (since Linux 5.10)
+    PrivateExpeditedRseq = c::MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ as u32,
+    /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ` (since Linux 5.10)
+    RegisterPrivateExpeditedRseq = c::MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ as u32,
+}
+
+/// A resource value for use with [`getrlimit`], [`setrlimit`], and
+/// [`prlimit`].
+///
+/// [`getrlimit`]: crate::process::getrlimit
+/// [`setrlimit`]: crate::process::setrlimit
+/// [`prlimit`]: crate::process::prlimit
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "fuchsia",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+#[cfg_attr(not(target_os = "l4re"), repr(u32))]
+#[cfg_attr(target_os = "l4re", repr(u64))]
+pub enum Resource {
+    /// `RLIMIT_CPU`
+    Cpu = bitcast!(c::RLIMIT_CPU),
+    /// `RLIMIT_FSIZE`
+    Fsize = bitcast!(c::RLIMIT_FSIZE),
+    /// `RLIMIT_DATA`
+    Data = bitcast!(c::RLIMIT_DATA),
+    /// `RLIMIT_STACK`
+    Stack = bitcast!(c::RLIMIT_STACK),
+    /// `RLIMIT_CORE`
+    #[cfg(not(target_os = "haiku"))]
+    Core = bitcast!(c::RLIMIT_CORE),
+    /// `RLIMIT_RSS`
+    // "nto" has `RLIMIT_RSS`, but it has the same value as `RLIMIT_AS`.
+    #[cfg(not(any(apple, solarish, target_os = "nto", target_os = "haiku")))]
+    Rss = bitcast!(c::RLIMIT_RSS),
+    /// `RLIMIT_NPROC`
+    #[cfg(not(any(solarish, target_os = "haiku")))]
+    Nproc = bitcast!(c::RLIMIT_NPROC),
+    /// `RLIMIT_NOFILE`
+    Nofile = bitcast!(c::RLIMIT_NOFILE),
+    /// `RLIMIT_MEMLOCK`
+    #[cfg(not(any(solarish, target_os = "aix", target_os = "haiku")))]
+    Memlock = bitcast!(c::RLIMIT_MEMLOCK),
+    /// `RLIMIT_AS`
+    #[cfg(not(target_os = "openbsd"))]
+    As = bitcast!(c::RLIMIT_AS),
+    /// `RLIMIT_LOCKS`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        target_os = "aix",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "nto"
+    )))]
+    Locks = bitcast!(c::RLIMIT_LOCKS),
+    /// `RLIMIT_SIGPENDING`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        target_os = "aix",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "nto"
+    )))]
+    Sigpending = bitcast!(c::RLIMIT_SIGPENDING),
+    /// `RLIMIT_MSGQUEUE`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        target_os = "aix",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "nto"
+    )))]
+    Msgqueue = bitcast!(c::RLIMIT_MSGQUEUE),
+    /// `RLIMIT_NICE`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        target_os = "aix",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "nto"
+    )))]
+    Nice = bitcast!(c::RLIMIT_NICE),
+    /// `RLIMIT_RTPRIO`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        target_os = "aix",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "nto"
+    )))]
+    Rtprio = bitcast!(c::RLIMIT_RTPRIO),
+    /// `RLIMIT_RTTIME`
+    #[cfg(not(any(
+        bsd,
+        solarish,
+        target_os = "aix",
+        target_os = "android",
+        target_os = "emscripten",
+        target_os = "haiku",
+        target_os = "hurd",
+        target_os = "nto",
+    )))]
+    Rttime = bitcast!(c::RLIMIT_RTTIME),
+}
+
+#[cfg(apple)]
+#[allow(non_upper_case_globals)]
+impl Resource {
+    /// `RLIMIT_RSS`
+    pub const Rss: Self = Self::As;
+}
+
+/// A CPU identifier as a raw integer.
+#[cfg(linux_kernel)]
+pub type RawCpuid = u32;
+#[cfg(freebsdlike)]
+pub type RawId = c::id_t;
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+pub(crate) type RawCpuSet = c::cpu_set_t;
+#[cfg(freebsdlike)]
+pub(crate) type RawCpuSet = c::cpuset_t;
+
+#[cfg(any(freebsdlike, linux_kernel, target_os = "fuchsia"))]
+#[inline]
+pub(crate) fn raw_cpu_set_new() -> RawCpuSet {
+    let mut set = unsafe { core::mem::zeroed() };
+    super::cpu_set::CPU_ZERO(&mut set);
+    set
+}
+
+#[cfg(any(freebsdlike, linux_kernel, target_os = "fuchsia"))]
+pub(crate) const CPU_SETSIZE: usize = c::CPU_SETSIZE as usize;
diff --git a/vendor/rustix/src/backend/libc/process/wait.rs b/vendor/rustix/src/backend/libc/process/wait.rs
new file mode 100644
index 0000000..9a932cf
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/process/wait.rs
@@ -0,0 +1,9 @@
+use crate::backend::c;
+
+pub(crate) use c::{
+    WCONTINUED, WEXITSTATUS, WIFCONTINUED, WIFEXITED, WIFSIGNALED, WIFSTOPPED, WNOHANG, WSTOPSIG,
+    WTERMSIG, WUNTRACED,
+};
+
+#[cfg(not(any(target_os = "openbsd", target_os = "redox", target_os = "wasi")))]
+pub(crate) use c::{WEXITED, WNOWAIT, WSTOPPED};
diff --git a/vendor/rustix/src/backend/libc/pty/mod.rs b/vendor/rustix/src/backend/libc/pty/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/pty/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/libc/pty/syscalls.rs b/vendor/rustix/src/backend/libc/pty/syscalls.rs
new file mode 100644
index 0000000..2395efd
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/pty/syscalls.rs
@@ -0,0 +1,106 @@
+//! libc syscalls supporting `rustix::pty`.
+
+use crate::backend::c;
+use crate::backend::conv::{borrowed_fd, ret};
+use crate::fd::BorrowedFd;
+use crate::io;
+#[cfg(all(
+    feature = "alloc",
+    any(apple, linux_like, target_os = "freebsd", target_os = "fuchsia")
+))]
+use {
+    crate::ffi::{CStr, CString},
+    crate::path::SMALL_PATH_BUFFER_SIZE,
+    alloc::borrow::ToOwned,
+    alloc::vec::Vec,
+};
+
+#[cfg(not(linux_kernel))]
+use crate::{backend::conv::ret_owned_fd, fd::OwnedFd, pty::OpenptFlags};
+
+#[cfg(not(linux_kernel))]
+#[inline]
+pub(crate) fn openpt(flags: OpenptFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(c::posix_openpt(flags.bits() as _)) }
+}
+
+#[cfg(all(
+    feature = "alloc",
+    any(apple, linux_like, target_os = "freebsd", target_os = "fuchsia")
+))]
+#[inline]
+pub(crate) fn ptsname(fd: BorrowedFd<'_>, mut buffer: Vec<u8>) -> io::Result<CString> {
+    // This code would benefit from having a better way to read into
+    // uninitialized memory, but that requires `unsafe`.
+    buffer.clear();
+    buffer.reserve(SMALL_PATH_BUFFER_SIZE);
+    buffer.resize(buffer.capacity(), 0_u8);
+
+    loop {
+        // On platforms with `ptsname_r`, use it.
+        #[cfg(any(linux_like, target_os = "fuchsia"))]
+        let r = unsafe { c::ptsname_r(borrowed_fd(fd), buffer.as_mut_ptr().cast(), buffer.len()) };
+
+        // FreeBSD 12 doesn't have `ptsname_r`.
+        #[cfg(target_os = "freebsd")]
+        let r = unsafe {
+            weak! {
+                fn ptsname_r(
+                     c::c_int,
+                     *mut c::c_char,
+                     c::size_t
+                ) -> c::c_int
+            }
+            if let Some(func) = ptsname_r.get() {
+                func(borrowed_fd(fd), buffer.as_mut_ptr().cast(), buffer.len())
+            } else {
+                libc::ENOSYS
+            }
+        };
+
+        // macOS 10.13.4 has `ptsname_r`; use it if we have it, otherwise fall
+        // back to calling the underlying ioctl directly.
+        #[cfg(apple)]
+        let r = unsafe {
+            weak! { fn ptsname_r(c::c_int, *mut c::c_char, c::size_t) -> c::c_int }
+
+            if let Some(libc_ptsname_r) = ptsname_r.get() {
+                libc_ptsname_r(borrowed_fd(fd), buffer.as_mut_ptr().cast(), buffer.len())
+            } else {
+                // The size declared in the `TIOCPTYGNAME` macro in
+                // sys/ttycom.h is 128.
+                let mut name: [u8; 128] = [0_u8; 128];
+                match c::ioctl(borrowed_fd(fd), c::TIOCPTYGNAME as _, &mut name) {
+                    0 => {
+                        let len = CStr::from_ptr(name.as_ptr().cast()).to_bytes().len();
+                        std::ptr::copy_nonoverlapping(name.as_ptr(), buffer.as_mut_ptr(), len + 1);
+                        0
+                    }
+                    _ => libc_errno::errno().0,
+                }
+            }
+        };
+
+        if r == 0 {
+            return Ok(unsafe { CStr::from_ptr(buffer.as_ptr().cast()).to_owned() });
+        }
+        if r != c::ERANGE {
+            return Err(io::Errno::from_raw_os_error(r));
+        }
+
+        // Use `Vec` reallocation strategy to grow capacity exponentially.
+        buffer.reserve(1);
+        buffer.resize(buffer.capacity(), 0_u8);
+    }
+}
+
+#[inline]
+pub(crate) fn unlockpt(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(c::unlockpt(borrowed_fd(fd))) }
+}
+
+#[cfg(not(linux_kernel))]
+#[inline]
+pub(crate) fn grantpt(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(c::grantpt(borrowed_fd(fd))) }
+}
diff --git a/vendor/rustix/src/backend/libc/rand/mod.rs b/vendor/rustix/src/backend/libc/rand/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/rand/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/libc/rand/syscalls.rs b/vendor/rustix/src/backend/libc/rand/syscalls.rs
new file mode 100644
index 0000000..3a3929e
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/rand/syscalls.rs
@@ -0,0 +1,18 @@
+//! libc syscalls supporting `rustix::rand`.
+
+#[cfg(linux_kernel)]
+use {crate::backend::c, crate::backend::conv::ret_usize, crate::io, crate::rand::GetRandomFlags};
+
+#[cfg(linux_kernel)]
+pub(crate) unsafe fn getrandom(
+    buf: *mut u8,
+    cap: usize,
+    flags: GetRandomFlags,
+) -> io::Result<usize> {
+    // `getrandom` wasn't supported in glibc until 2.25.
+    weak_or_syscall! {
+        fn getrandom(buf: *mut c::c_void, buflen: c::size_t, flags: c::c_uint) via SYS_getrandom -> c::ssize_t
+    }
+
+    ret_usize(getrandom(buf.cast(), cap, flags.bits()))
+}
diff --git a/vendor/rustix/src/backend/libc/rand/types.rs b/vendor/rustix/src/backend/libc/rand/types.rs
new file mode 100644
index 0000000..46690b5
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/rand/types.rs
@@ -0,0 +1,24 @@
+#[cfg(linux_kernel)]
+use crate::backend::c;
+#[cfg(linux_kernel)]
+use bitflags::bitflags;
+
+#[cfg(linux_kernel)]
+bitflags! {
+    /// `GRND_*` flags for use with [`getrandom`].
+    ///
+    /// [`getrandom`]: crate::rand::getrandom
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct GetRandomFlags: u32 {
+        /// `GRND_RANDOM`
+        const RANDOM = c::GRND_RANDOM;
+        /// `GRND_NONBLOCK`
+        const NONBLOCK = c::GRND_NONBLOCK;
+        /// `GRND_INSECURE`
+        const INSECURE = c::GRND_INSECURE;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/shm/mod.rs b/vendor/rustix/src/backend/libc/shm/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/shm/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/libc/shm/syscalls.rs b/vendor/rustix/src/backend/libc/shm/syscalls.rs
new file mode 100644
index 0000000..b0d907f
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/shm/syscalls.rs
@@ -0,0 +1,25 @@
+use crate::ffi::CStr;
+
+use crate::backend::c;
+use crate::backend::conv::{c_str, ret, ret_owned_fd};
+use crate::fd::OwnedFd;
+use crate::fs::Mode;
+use crate::io;
+use crate::shm::ShmOFlags;
+
+pub(crate) fn shm_open(name: &CStr, oflags: ShmOFlags, mode: Mode) -> io::Result<OwnedFd> {
+    // On this platforms, `mode_t` is `u16` and can't be passed directly to a
+    // variadic function.
+    #[cfg(apple)]
+    let mode: c::c_uint = mode.bits().into();
+
+    // Otherwise, cast to `mode_t` as that's what `open` is documented to take.
+    #[cfg(not(apple))]
+    let mode: c::mode_t = mode.bits() as _;
+
+    unsafe { ret_owned_fd(c::shm_open(c_str(name), bitflags_bits!(oflags), mode)) }
+}
+
+pub(crate) fn shm_unlink(name: &CStr) -> io::Result<()> {
+    unsafe { ret(c::shm_unlink(c_str(name))) }
+}
diff --git a/vendor/rustix/src/backend/libc/shm/types.rs b/vendor/rustix/src/backend/libc/shm/types.rs
new file mode 100644
index 0000000..6575ef5
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/shm/types.rs
@@ -0,0 +1,30 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `O_*` constants for use with [`shm_open`].
+    ///
+    /// [`shm_open`]: crate:shm::shm_open
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct ShmOFlags: u32 {
+        /// `O_CREAT`
+        #[doc(alias = "CREAT")]
+        const CREATE = bitcast!(c::O_CREAT);
+
+        /// `O_EXCL`
+        const EXCL = bitcast!(c::O_EXCL);
+
+        /// `O_RDONLY`
+        const RDONLY = bitcast!(c::O_RDONLY);
+
+        /// `O_RDWR`
+        const RDWR = bitcast!(c::O_RDWR);
+
+        /// `O_TRUNC`
+        const TRUNC = bitcast!(c::O_TRUNC);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/system/mod.rs b/vendor/rustix/src/backend/libc/system/mod.rs
new file mode 100644
index 0000000..bff7fd5
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/system/mod.rs
@@ -0,0 +1,3 @@
+#[cfg(not(windows))]
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/libc/system/syscalls.rs b/vendor/rustix/src/backend/libc/system/syscalls.rs
new file mode 100644
index 0000000..05d674b
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/system/syscalls.rs
@@ -0,0 +1,67 @@
+//! libc syscalls supporting `rustix::process`.
+
+use super::types::RawUname;
+use crate::backend::c;
+#[cfg(not(target_os = "wasi"))]
+use crate::backend::conv::ret_infallible;
+#[cfg(target_os = "linux")]
+use crate::system::RebootCommand;
+#[cfg(linux_kernel)]
+use crate::system::Sysinfo;
+use core::mem::MaybeUninit;
+#[cfg(not(any(
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use {crate::backend::conv::ret, crate::io};
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+pub(crate) fn uname() -> RawUname {
+    let mut uname = MaybeUninit::<RawUname>::uninit();
+    unsafe {
+        let r = c::uname(uname.as_mut_ptr());
+
+        // On POSIX, `uname` is documented to return non-negative on success
+        // instead of the usual 0, though some specific systems do document
+        // that they always use zero allowing us to skip this check.
+        #[cfg(not(any(apple, freebsdlike, linux_like, target_os = "netbsd")))]
+        let r = core::cmp::min(r, 0);
+
+        ret_infallible(r);
+        uname.assume_init()
+    }
+}
+
+#[cfg(linux_kernel)]
+pub(crate) fn sysinfo() -> Sysinfo {
+    let mut info = MaybeUninit::<Sysinfo>::uninit();
+    unsafe {
+        ret_infallible(c::sysinfo(info.as_mut_ptr()));
+        info.assume_init()
+    }
+}
+
+#[cfg(not(any(
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+pub(crate) fn sethostname(name: &[u8]) -> io::Result<()> {
+    unsafe {
+        ret(c::sethostname(
+            name.as_ptr().cast(),
+            name.len().try_into().map_err(|_| io::Errno::INVAL)?,
+        ))
+    }
+}
+
+#[cfg(target_os = "linux")]
+pub(crate) fn reboot(cmd: RebootCommand) -> io::Result<()> {
+    unsafe { ret(c::reboot(cmd as i32)) }
+}
diff --git a/vendor/rustix/src/backend/libc/system/types.rs b/vendor/rustix/src/backend/libc/system/types.rs
new file mode 100644
index 0000000..731e89b
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/system/types.rs
@@ -0,0 +1,8 @@
+use crate::backend::c;
+
+/// `sysinfo`
+#[cfg(linux_kernel)]
+pub type Sysinfo = c::sysinfo;
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) type RawUname = c::utsname;
diff --git a/vendor/rustix/src/backend/libc/termios/mod.rs b/vendor/rustix/src/backend/libc/termios/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/termios/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/libc/termios/syscalls.rs b/vendor/rustix/src/backend/libc/termios/syscalls.rs
new file mode 100644
index 0000000..a833aea
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/termios/syscalls.rs
@@ -0,0 +1,403 @@
+//! libc syscalls supporting `rustix::termios`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend::syscalls` module documentation for details.
+
+use crate::backend::c;
+#[cfg(not(target_os = "wasi"))]
+use crate::backend::conv::ret_pid_t;
+use crate::backend::conv::{borrowed_fd, ret};
+use crate::fd::BorrowedFd;
+#[cfg(all(feature = "alloc", feature = "procfs"))]
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+use crate::ffi::CStr;
+#[cfg(any(
+    not(target_os = "espidf"),
+    all(
+        feature = "procfs",
+        not(any(target_os = "fuchsia", target_os = "wasi"))
+    )
+))]
+use core::mem::MaybeUninit;
+#[cfg(not(target_os = "wasi"))]
+use {crate::io, crate::pid::Pid};
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+use {
+    crate::termios::{Action, OptionalActions, QueueSelector, Termios, Winsize},
+    crate::utils::as_mut_ptr,
+};
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn tcgetattr(fd: BorrowedFd<'_>) -> io::Result<Termios> {
+    // If we have `TCGETS2`, use it, so that we fill in the `c_ispeed` and
+    // `c_ospeed` fields.
+    #[cfg(linux_kernel)]
+    {
+        use crate::termios::{ControlModes, InputModes, LocalModes, OutputModes, SpecialCodes};
+        use crate::utils::default_array;
+
+        let termios2 = unsafe {
+            let mut termios2 = MaybeUninit::<c::termios2>::uninit();
+
+            // QEMU's `TCGETS2` doesn't currently set `input_speed` or
+            // `output_speed` on PowerPC, so zero out the fields ourselves.
+            #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
+            {
+                termios2.write(core::mem::zeroed());
+            }
+
+            ret(c::ioctl(
+                borrowed_fd(fd),
+                c::TCGETS2 as _,
+                termios2.as_mut_ptr(),
+            ))?;
+
+            termios2.assume_init()
+        };
+
+        // Convert from the Linux `termios2` to our `Termios`.
+        let mut result = Termios {
+            input_modes: InputModes::from_bits_retain(termios2.c_iflag),
+            output_modes: OutputModes::from_bits_retain(termios2.c_oflag),
+            control_modes: ControlModes::from_bits_retain(termios2.c_cflag),
+            local_modes: LocalModes::from_bits_retain(termios2.c_lflag),
+            line_discipline: termios2.c_line,
+            special_codes: SpecialCodes(default_array()),
+            input_speed: termios2.c_ispeed,
+            output_speed: termios2.c_ospeed,
+        };
+
+        // QEMU's `TCGETS2` doesn't currently set `input_speed` or
+        // `output_speed` on PowerPC, so set them manually if we can.
+        #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
+        {
+            use crate::termios::speed;
+
+            if result.output_speed == 0 && (termios2.c_cflag & c::CBAUD) != c::BOTHER {
+                if let Some(output_speed) = speed::decode(termios2.c_cflag & c::CBAUD) {
+                    result.output_speed = output_speed;
+                }
+            }
+            if result.input_speed == 0
+                && ((termios2.c_cflag & c::CIBAUD) >> c::IBSHIFT) != c::BOTHER
+            {
+                // For input speeds, `B0` is special-cased to mean the input
+                // speed is the same as the output speed.
+                if ((termios2.c_cflag & c::CIBAUD) >> c::IBSHIFT) == c::B0 {
+                    result.input_speed = result.output_speed;
+                } else if let Some(input_speed) =
+                    speed::decode((termios2.c_cflag & c::CIBAUD) >> c::IBSHIFT)
+                {
+                    result.input_speed = input_speed;
+                }
+            }
+        }
+
+        result.special_codes.0[..termios2.c_cc.len()].copy_from_slice(&termios2.c_cc);
+
+        Ok(result)
+    }
+
+    #[cfg(not(linux_kernel))]
+    unsafe {
+        let mut result = MaybeUninit::<Termios>::uninit();
+
+        // `result` is a `Termios` which starts with the same layout as
+        // `libc::termios`, so we can cast the pointer.
+        ret(c::tcgetattr(borrowed_fd(fd), result.as_mut_ptr().cast()))?;
+
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn tcgetpgrp(fd: BorrowedFd<'_>) -> io::Result<Pid> {
+    unsafe {
+        let pid = ret_pid_t(c::tcgetpgrp(borrowed_fd(fd)))?;
+
+        // This doesn't appear to be documented, but on Linux, it appears
+        // `tcsetpgrp` can succceed and set the pid to 0 if we pass it a
+        // pseudo-terminal device fd. For now, translate it into `OPNOTSUPP`.
+        #[cfg(linux_kernel)]
+        if pid == 0 {
+            return Err(io::Errno::OPNOTSUPP);
+        }
+
+        Ok(Pid::from_raw_unchecked(pid))
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn tcsetpgrp(fd: BorrowedFd<'_>, pid: Pid) -> io::Result<()> {
+    unsafe { ret(c::tcsetpgrp(borrowed_fd(fd), pid.as_raw_nonzero().get())) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn tcsetattr(
+    fd: BorrowedFd<'_>,
+    optional_actions: OptionalActions,
+    termios: &Termios,
+) -> io::Result<()> {
+    // If we have `TCSETS2`, use it, so that we use the `c_ispeed` and
+    // `c_ospeed` fields.
+    #[cfg(linux_kernel)]
+    {
+        use crate::termios::speed;
+        use crate::utils::default_array;
+        use linux_raw_sys::general::{termios2, BOTHER, CBAUD, IBSHIFT};
+
+        #[cfg(not(any(target_arch = "sparc", target_arch = "sparc64")))]
+        use linux_raw_sys::ioctl::{TCSETS, TCSETS2};
+
+        // linux-raw-sys' ioctl-generation script for sparc isn't working yet,
+        // so as a temporary workaround, declare these manually.
+        #[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
+        const TCSETS: u32 = 0x8024_5409;
+        #[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
+        const TCSETS2: u32 = 0x802c_540d;
+
+        // Translate from `optional_actions` into an ioctl request code. On
+        // MIPS, `optional_actions` already has `TCGETS` added to it.
+        let request = TCSETS2
+            + if cfg!(any(
+                target_arch = "mips",
+                target_arch = "mips32r6",
+                target_arch = "mips64",
+                target_arch = "mips64r6"
+            )) {
+                optional_actions as u32 - TCSETS
+            } else {
+                optional_actions as u32
+            };
+
+        let input_speed = termios.input_speed();
+        let output_speed = termios.output_speed();
+        let mut termios2 = termios2 {
+            c_iflag: termios.input_modes.bits(),
+            c_oflag: termios.output_modes.bits(),
+            c_cflag: termios.control_modes.bits(),
+            c_lflag: termios.local_modes.bits(),
+            c_line: termios.line_discipline,
+            c_cc: default_array(),
+            c_ispeed: input_speed,
+            c_ospeed: output_speed,
+        };
+        // Ensure that our input and output speeds are set, as `libc`
+        // routines don't always support setting these separately.
+        termios2.c_cflag &= !CBAUD;
+        termios2.c_cflag |= speed::encode(output_speed).unwrap_or(BOTHER);
+        termios2.c_cflag &= !(CBAUD << IBSHIFT);
+        termios2.c_cflag |= speed::encode(input_speed).unwrap_or(BOTHER) << IBSHIFT;
+        let nccs = termios2.c_cc.len();
+        termios2
+            .c_cc
+            .copy_from_slice(&termios.special_codes.0[..nccs]);
+
+        unsafe { ret(c::ioctl(borrowed_fd(fd), request as _, &termios2)) }
+    }
+
+    #[cfg(not(linux_kernel))]
+    unsafe {
+        ret(c::tcsetattr(
+            borrowed_fd(fd),
+            optional_actions as _,
+            crate::utils::as_ptr(termios).cast(),
+        ))
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn tcsendbreak(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(c::tcsendbreak(borrowed_fd(fd), 0)) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn tcdrain(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(c::tcdrain(borrowed_fd(fd))) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn tcflush(fd: BorrowedFd<'_>, queue_selector: QueueSelector) -> io::Result<()> {
+    unsafe { ret(c::tcflush(borrowed_fd(fd), queue_selector as _)) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn tcflow(fd: BorrowedFd<'_>, action: Action) -> io::Result<()> {
+    unsafe { ret(c::tcflow(borrowed_fd(fd), action as _)) }
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn tcgetsid(fd: BorrowedFd<'_>) -> io::Result<Pid> {
+    unsafe {
+        let pid = ret_pid_t(c::tcgetsid(borrowed_fd(fd)))?;
+        Ok(Pid::from_raw_unchecked(pid))
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn tcsetwinsize(fd: BorrowedFd<'_>, winsize: Winsize) -> io::Result<()> {
+    unsafe { ret(c::ioctl(borrowed_fd(fd), c::TIOCSWINSZ, &winsize)) }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+pub(crate) fn tcgetwinsize(fd: BorrowedFd<'_>) -> io::Result<Winsize> {
+    unsafe {
+        let mut buf = MaybeUninit::<Winsize>::uninit();
+        ret(c::ioctl(
+            borrowed_fd(fd),
+            c::TIOCGWINSZ.into(),
+            buf.as_mut_ptr(),
+        ))?;
+        Ok(buf.assume_init())
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "nto", target_os = "wasi")))]
+#[inline]
+pub(crate) fn set_speed(termios: &mut Termios, arbitrary_speed: u32) -> io::Result<()> {
+    #[cfg(bsd)]
+    let encoded_speed = arbitrary_speed;
+
+    #[cfg(not(bsd))]
+    let encoded_speed = match crate::termios::speed::encode(arbitrary_speed) {
+        Some(encoded_speed) => encoded_speed,
+        #[cfg(linux_kernel)]
+        None => c::BOTHER,
+        #[cfg(not(linux_kernel))]
+        None => return Err(io::Errno::INVAL),
+    };
+
+    #[cfg(not(linux_kernel))]
+    unsafe {
+        ret(c::cfsetspeed(
+            as_mut_ptr(termios).cast(),
+            encoded_speed.into(),
+        ))
+    }
+
+    // Linux libc implementations don't support arbitrary speeds, so we encode
+    // the speed manually.
+    #[cfg(linux_kernel)]
+    {
+        use crate::termios::ControlModes;
+
+        debug_assert_eq!(encoded_speed & !c::CBAUD, 0);
+
+        termios.control_modes -= ControlModes::from_bits_retain(c::CBAUD | c::CIBAUD);
+        termios.control_modes |=
+            ControlModes::from_bits_retain(encoded_speed | (encoded_speed << c::IBSHIFT));
+
+        termios.input_speed = arbitrary_speed;
+        termios.output_speed = arbitrary_speed;
+
+        Ok(())
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+#[inline]
+pub(crate) fn set_output_speed(termios: &mut Termios, arbitrary_speed: u32) -> io::Result<()> {
+    #[cfg(bsd)]
+    let encoded_speed = arbitrary_speed;
+
+    #[cfg(not(bsd))]
+    let encoded_speed = match crate::termios::speed::encode(arbitrary_speed) {
+        Some(encoded_speed) => encoded_speed,
+        #[cfg(linux_kernel)]
+        None => c::BOTHER,
+        #[cfg(not(linux_kernel))]
+        None => return Err(io::Errno::INVAL),
+    };
+
+    #[cfg(not(linux_kernel))]
+    unsafe {
+        ret(c::cfsetospeed(
+            as_mut_ptr(termios).cast(),
+            encoded_speed.into(),
+        ))
+    }
+
+    // Linux libc implementations don't support arbitrary speeds or setting the
+    // input and output speeds separately, so we encode the speed manually.
+    #[cfg(linux_kernel)]
+    {
+        use crate::termios::ControlModes;
+
+        debug_assert_eq!(encoded_speed & !c::CBAUD, 0);
+
+        termios.control_modes -= ControlModes::from_bits_retain(c::CBAUD);
+        termios.control_modes |= ControlModes::from_bits_retain(encoded_speed);
+
+        termios.output_speed = arbitrary_speed;
+
+        Ok(())
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
+#[inline]
+pub(crate) fn set_input_speed(termios: &mut Termios, arbitrary_speed: u32) -> io::Result<()> {
+    #[cfg(bsd)]
+    let encoded_speed = arbitrary_speed;
+
+    #[cfg(not(bsd))]
+    let encoded_speed = match crate::termios::speed::encode(arbitrary_speed) {
+        Some(encoded_speed) => encoded_speed,
+        #[cfg(linux_kernel)]
+        None => c::BOTHER,
+        #[cfg(not(linux_kernel))]
+        None => return Err(io::Errno::INVAL),
+    };
+
+    #[cfg(not(linux_kernel))]
+    unsafe {
+        ret(c::cfsetispeed(
+            as_mut_ptr(termios).cast(),
+            encoded_speed.into(),
+        ))
+    }
+
+    // Linux libc implementations don't support arbitrary speeds or setting the
+    // input and output speeds separately, so we encode the speed manually.
+    #[cfg(linux_kernel)]
+    {
+        use crate::termios::ControlModes;
+
+        debug_assert_eq!(encoded_speed & !c::CBAUD, 0);
+
+        termios.control_modes -= ControlModes::from_bits_retain(c::CIBAUD);
+        termios.control_modes |= ControlModes::from_bits_retain(encoded_speed << c::IBSHIFT);
+
+        termios.input_speed = arbitrary_speed;
+
+        Ok(())
+    }
+}
+
+#[cfg(not(any(target_os = "espidf", target_os = "nto", target_os = "wasi")))]
+#[inline]
+pub(crate) fn cfmakeraw(termios: &mut Termios) {
+    unsafe { c::cfmakeraw(as_mut_ptr(termios).cast()) }
+}
+
+pub(crate) fn isatty(fd: BorrowedFd<'_>) -> bool {
+    // Use the return value of `isatty` alone. We don't check `errno` because
+    // we return `bool` rather than `io::Result<bool>`, because we assume
+    // `BorrowedFd` protects us from `EBADF`, and any other reasonably
+    // anticipated `errno` value would end up interpreted as “assume it's not a
+    // terminal” anyway.
+    unsafe { c::isatty(borrowed_fd(fd)) != 0 }
+}
+
+#[cfg(all(feature = "alloc", feature = "procfs"))]
+#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+pub(crate) fn ttyname(dirfd: BorrowedFd<'_>, buf: &mut [MaybeUninit<u8>]) -> io::Result<usize> {
+    unsafe {
+        // `ttyname_r` returns its error status rather than using `errno`.
+        match c::ttyname_r(borrowed_fd(dirfd), buf.as_mut_ptr().cast(), buf.len()) {
+            0 => Ok(CStr::from_ptr(buf.as_ptr().cast()).to_bytes().len()),
+            err => Err(io::Errno::from_raw_os_error(err)),
+        }
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/thread/futex.rs b/vendor/rustix/src/backend/libc/thread/futex.rs
new file mode 100644
index 0000000..44d96f0
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/thread/futex.rs
@@ -0,0 +1,43 @@
+use crate::backend::c;
+
+bitflags::bitflags! {
+    /// `FUTEX_*` flags for use with [`futex`].
+    ///
+    /// [`futex`]: crate::thread::futex
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FutexFlags: u32 {
+        /// `FUTEX_PRIVATE_FLAG`
+        const PRIVATE = bitcast!(c::FUTEX_PRIVATE_FLAG);
+        /// `FUTEX_CLOCK_REALTIME`
+        const CLOCK_REALTIME = bitcast!(c::FUTEX_CLOCK_REALTIME);
+    }
+}
+
+/// `FUTEX_*` operations for use with [`futex`].
+///
+/// [`futex`]: crate::thread::futex
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+#[repr(u32)]
+pub enum FutexOperation {
+    /// `FUTEX_WAIT`
+    Wait = bitcast!(c::FUTEX_WAIT),
+    /// `FUTEX_WAKE`
+    Wake = bitcast!(c::FUTEX_WAKE),
+    /// `FUTEX_FD`
+    Fd = bitcast!(c::FUTEX_FD),
+    /// `FUTEX_REQUEUE`
+    Requeue = bitcast!(c::FUTEX_REQUEUE),
+    /// `FUTEX_CMP_REQUEUE`
+    CmpRequeue = bitcast!(c::FUTEX_CMP_REQUEUE),
+    /// `FUTEX_WAKE_OP`
+    WakeOp = bitcast!(c::FUTEX_WAKE_OP),
+    /// `FUTEX_LOCK_PI`
+    LockPi = bitcast!(c::FUTEX_LOCK_PI),
+    /// `FUTEX_UNLOCK_PI`
+    UnlockPi = bitcast!(c::FUTEX_UNLOCK_PI),
+    /// `FUTEX_TRYLOCK_PI`
+    TrylockPi = bitcast!(c::FUTEX_TRYLOCK_PI),
+    /// `FUTEX_WAIT_BITSET`
+    WaitBitset = bitcast!(c::FUTEX_WAIT_BITSET),
+}
diff --git a/vendor/rustix/src/backend/libc/thread/mod.rs b/vendor/rustix/src/backend/libc/thread/mod.rs
new file mode 100644
index 0000000..4f8c87c
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/thread/mod.rs
@@ -0,0 +1,4 @@
+#[cfg(linux_kernel)]
+pub(crate) mod futex;
+#[cfg(not(windows))]
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/libc/thread/syscalls.rs b/vendor/rustix/src/backend/libc/thread/syscalls.rs
new file mode 100644
index 0000000..33750f4
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/thread/syscalls.rs
@@ -0,0 +1,523 @@
+//! libc syscalls supporting `rustix::thread`.
+
+use crate::backend::c;
+use crate::backend::conv::ret;
+use crate::io;
+#[cfg(not(target_os = "redox"))]
+use crate::thread::{NanosleepRelativeResult, Timespec};
+#[cfg(all(target_env = "gnu", fix_y2038))]
+use crate::timespec::LibcTimespec;
+use core::mem::MaybeUninit;
+#[cfg(linux_kernel)]
+use {
+    crate::backend::conv::{borrowed_fd, ret_c_int, ret_usize},
+    crate::fd::BorrowedFd,
+    crate::pid::Pid,
+    crate::thread::{FutexFlags, FutexOperation},
+    crate::utils::as_mut_ptr,
+};
+#[cfg(not(any(
+    apple,
+    freebsdlike,
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "haiku",
+    target_os = "openbsd",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+use {crate::thread::ClockId, core::ptr::null_mut};
+
+#[cfg(all(target_env = "gnu", fix_y2038))]
+weak!(fn __clock_nanosleep_time64(c::clockid_t, c::c_int, *const LibcTimespec, *mut LibcTimespec) -> c::c_int);
+#[cfg(all(target_env = "gnu", fix_y2038))]
+weak!(fn __nanosleep64(*const LibcTimespec, *mut LibcTimespec) -> c::c_int);
+
+#[cfg(not(any(
+    apple,
+    target_os = "dragonfly",
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "freebsd", // FreeBSD 12 has clock_nanosleep, but libc targets FreeBSD 11.
+    target_os = "haiku",
+    target_os = "openbsd",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+#[inline]
+pub(crate) fn clock_nanosleep_relative(id: ClockId, request: &Timespec) -> NanosleepRelativeResult {
+    // Old 32-bit version: libc has `clock_nanosleep` but it is not y2038 safe
+    // by default. But there may be a `__clock_nanosleep_time64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_clock_nanosleep) = __clock_nanosleep_time64.get() {
+            let flags = 0;
+            let mut remain = MaybeUninit::<LibcTimespec>::uninit();
+
+            unsafe {
+                return match libc_clock_nanosleep(
+                    id as c::clockid_t,
+                    flags,
+                    &request.clone().into(),
+                    remain.as_mut_ptr(),
+                ) {
+                    0 => NanosleepRelativeResult::Ok,
+                    err if err == io::Errno::INTR.0 => {
+                        NanosleepRelativeResult::Interrupted(remain.assume_init().into())
+                    }
+                    err => NanosleepRelativeResult::Err(io::Errno(err)),
+                };
+            }
+        }
+
+        clock_nanosleep_relative_old(id, request)
+    }
+
+    // Main version: libc is y2038 safe and has `clock_nanosleep`.
+    #[cfg(not(fix_y2038))]
+    unsafe {
+        let flags = 0;
+        let mut remain = MaybeUninit::<Timespec>::uninit();
+
+        match c::clock_nanosleep(id as c::clockid_t, flags, request, remain.as_mut_ptr()) {
+            0 => NanosleepRelativeResult::Ok,
+            err if err == io::Errno::INTR.0 => {
+                NanosleepRelativeResult::Interrupted(remain.assume_init())
+            }
+            err => NanosleepRelativeResult::Err(io::Errno(err)),
+        }
+    }
+}
+
+#[cfg(all(
+    fix_y2038,
+    not(any(
+        apple,
+        target_os = "emscripten",
+        target_os = "haiku",
+        target_os = "vita"
+    ))
+))]
+fn clock_nanosleep_relative_old(id: ClockId, request: &Timespec) -> NanosleepRelativeResult {
+    let tv_sec = match request.tv_sec.try_into() {
+        Ok(tv_sec) => tv_sec,
+        Err(_) => return NanosleepRelativeResult::Err(io::Errno::OVERFLOW),
+    };
+    let tv_nsec = match request.tv_nsec.try_into() {
+        Ok(tv_nsec) => tv_nsec,
+        Err(_) => return NanosleepRelativeResult::Err(io::Errno::INVAL),
+    };
+    let old_request = c::timespec { tv_sec, tv_nsec };
+    let mut old_remain = MaybeUninit::<c::timespec>::uninit();
+    let flags = 0;
+
+    unsafe {
+        match c::clock_nanosleep(
+            id as c::clockid_t,
+            flags,
+            &old_request,
+            old_remain.as_mut_ptr(),
+        ) {
+            0 => NanosleepRelativeResult::Ok,
+            err if err == io::Errno::INTR.0 => {
+                let old_remain = old_remain.assume_init();
+                let remain = Timespec {
+                    tv_sec: old_remain.tv_sec.into(),
+                    tv_nsec: old_remain.tv_nsec.into(),
+                };
+                NanosleepRelativeResult::Interrupted(remain)
+            }
+            err => NanosleepRelativeResult::Err(io::Errno(err)),
+        }
+    }
+}
+
+#[cfg(not(any(
+    apple,
+    target_os = "dragonfly",
+    target_os = "emscripten",
+    target_os = "espidf",
+    target_os = "freebsd", // FreeBSD 12 has clock_nanosleep, but libc targets FreeBSD 11.
+    target_os = "haiku",
+    target_os = "openbsd",
+    target_os = "redox",
+    target_os = "vita",
+    target_os = "wasi",
+)))]
+#[inline]
+pub(crate) fn clock_nanosleep_absolute(id: ClockId, request: &Timespec) -> io::Result<()> {
+    // Old 32-bit version: libc has `clock_nanosleep` but it is not y2038 safe
+    // by default. But there may be a `__clock_nanosleep_time64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_clock_nanosleep) = __clock_nanosleep_time64.get() {
+            let flags = c::TIMER_ABSTIME;
+            unsafe {
+                return match {
+                    libc_clock_nanosleep(
+                        id as c::clockid_t,
+                        flags,
+                        &request.clone().into(),
+                        null_mut(),
+                    )
+                } {
+                    0 => Ok(()),
+                    err => Err(io::Errno(err)),
+                };
+            }
+        }
+
+        clock_nanosleep_absolute_old(id, request)
+    }
+
+    // Main version: libc is y2038 safe and has `clock_nanosleep`.
+    #[cfg(not(fix_y2038))]
+    {
+        let flags = c::TIMER_ABSTIME;
+
+        match unsafe { c::clock_nanosleep(id as c::clockid_t, flags as _, request, null_mut()) } {
+            0 => Ok(()),
+            err => Err(io::Errno(err)),
+        }
+    }
+}
+
+#[cfg(all(
+    fix_y2038,
+    not(any(
+        apple,
+        target_os = "emscripten",
+        target_os = "haiku",
+        target_os = "vita"
+    ))
+))]
+fn clock_nanosleep_absolute_old(id: ClockId, request: &Timespec) -> io::Result<()> {
+    let flags = c::TIMER_ABSTIME;
+
+    let old_request = c::timespec {
+        tv_sec: request.tv_sec.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        tv_nsec: request.tv_nsec.try_into().map_err(|_| io::Errno::INVAL)?,
+    };
+    match unsafe { c::clock_nanosleep(id as c::clockid_t, flags, &old_request, null_mut()) } {
+        0 => Ok(()),
+        err => Err(io::Errno(err)),
+    }
+}
+
+#[cfg(not(target_os = "redox"))]
+#[inline]
+pub(crate) fn nanosleep(request: &Timespec) -> NanosleepRelativeResult {
+    // Old 32-bit version: libc has `nanosleep` but it is not y2038 safe by
+    // default. But there may be a `__nanosleep64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_nanosleep) = __nanosleep64.get() {
+            let mut remain = MaybeUninit::<LibcTimespec>::uninit();
+            unsafe {
+                return match ret(libc_nanosleep(&request.clone().into(), remain.as_mut_ptr())) {
+                    Ok(()) => NanosleepRelativeResult::Ok,
+                    Err(io::Errno::INTR) => {
+                        NanosleepRelativeResult::Interrupted(remain.assume_init().into())
+                    }
+                    Err(err) => NanosleepRelativeResult::Err(err),
+                };
+            }
+        }
+
+        nanosleep_old(request)
+    }
+
+    // Main version: libc is y2038 safe and has `nanosleep`.
+    #[cfg(not(fix_y2038))]
+    unsafe {
+        let mut remain = MaybeUninit::<Timespec>::uninit();
+
+        match ret(c::nanosleep(request, remain.as_mut_ptr())) {
+            Ok(()) => NanosleepRelativeResult::Ok,
+            Err(io::Errno::INTR) => NanosleepRelativeResult::Interrupted(remain.assume_init()),
+            Err(err) => NanosleepRelativeResult::Err(err),
+        }
+    }
+}
+
+#[cfg(fix_y2038)]
+fn nanosleep_old(request: &Timespec) -> NanosleepRelativeResult {
+    let tv_sec = match request.tv_sec.try_into() {
+        Ok(tv_sec) => tv_sec,
+        Err(_) => return NanosleepRelativeResult::Err(io::Errno::OVERFLOW),
+    };
+    let tv_nsec = match request.tv_nsec.try_into() {
+        Ok(tv_nsec) => tv_nsec,
+        Err(_) => return NanosleepRelativeResult::Err(io::Errno::INVAL),
+    };
+    let old_request = c::timespec { tv_sec, tv_nsec };
+    let mut old_remain = MaybeUninit::<c::timespec>::uninit();
+
+    unsafe {
+        match ret(c::nanosleep(&old_request, old_remain.as_mut_ptr())) {
+            Ok(()) => NanosleepRelativeResult::Ok,
+            Err(io::Errno::INTR) => {
+                let old_remain = old_remain.assume_init();
+                let remain = Timespec {
+                    tv_sec: old_remain.tv_sec.into(),
+                    tv_nsec: old_remain.tv_nsec.into(),
+                };
+                NanosleepRelativeResult::Interrupted(remain)
+            }
+            Err(err) => NanosleepRelativeResult::Err(err),
+        }
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+#[must_use]
+pub(crate) fn gettid() -> Pid {
+    // `gettid` wasn't supported in glibc until 2.30, and musl until 1.2.2,
+    // so use `syscall`.
+    // <https://sourceware.org/bugzilla/show_bug.cgi?id=6399#c62>
+    weak_or_syscall! {
+        fn gettid() via SYS_gettid -> c::pid_t
+    }
+
+    unsafe {
+        let tid = gettid();
+        Pid::from_raw_unchecked(tid)
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn setns(fd: BorrowedFd<'_>, nstype: c::c_int) -> io::Result<c::c_int> {
+    // `setns` wasn't supported in glibc until 2.14, and musl until 0.9.5,
+    // so use `syscall`.
+    weak_or_syscall! {
+        fn setns(fd: c::c_int, nstype: c::c_int) via SYS_setns -> c::c_int
+    }
+
+    unsafe { ret_c_int(setns(borrowed_fd(fd), nstype)) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn unshare(flags: crate::thread::UnshareFlags) -> io::Result<()> {
+    unsafe { ret(c::unshare(flags.bits() as i32)) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn capget(
+    header: &mut linux_raw_sys::general::__user_cap_header_struct,
+    data: &mut [MaybeUninit<linux_raw_sys::general::__user_cap_data_struct>],
+) -> io::Result<()> {
+    syscall! {
+        fn capget(
+            hdrp: *mut linux_raw_sys::general::__user_cap_header_struct,
+            data: *mut linux_raw_sys::general::__user_cap_data_struct
+        ) via SYS_capget -> c::c_int
+    }
+
+    unsafe {
+        ret(capget(
+            as_mut_ptr(header),
+            data.as_mut_ptr()
+                .cast::<linux_raw_sys::general::__user_cap_data_struct>(),
+        ))
+    }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn capset(
+    header: &mut linux_raw_sys::general::__user_cap_header_struct,
+    data: &[linux_raw_sys::general::__user_cap_data_struct],
+) -> io::Result<()> {
+    syscall! {
+        fn capset(
+            hdrp: *mut linux_raw_sys::general::__user_cap_header_struct,
+            data: *const linux_raw_sys::general::__user_cap_data_struct
+        ) via SYS_capset -> c::c_int
+    }
+
+    unsafe { ret(capset(as_mut_ptr(header), data.as_ptr())) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn setuid_thread(uid: crate::ugid::Uid) -> io::Result<()> {
+    syscall! {
+        fn setuid(uid: c::uid_t) via SYS_setuid -> c::c_int
+    }
+
+    unsafe { ret(setuid(uid.as_raw())) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn setresuid_thread(
+    ruid: crate::ugid::Uid,
+    euid: crate::ugid::Uid,
+    suid: crate::ugid::Uid,
+) -> io::Result<()> {
+    #[cfg(any(target_arch = "x86", target_arch = "arm", target_arch = "sparc"))]
+    const SYS: c::c_long = c::SYS_setresuid32 as c::c_long;
+    #[cfg(not(any(target_arch = "x86", target_arch = "arm", target_arch = "sparc")))]
+    const SYS: c::c_long = c::SYS_setresuid as c::c_long;
+
+    syscall! {
+        fn setresuid(ruid: c::uid_t, euid: c::uid_t, suid: c::uid_t) via SYS -> c::c_int
+    }
+
+    unsafe { ret(setresuid(ruid.as_raw(), euid.as_raw(), suid.as_raw())) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn setgid_thread(gid: crate::ugid::Gid) -> io::Result<()> {
+    syscall! {
+        fn setgid(gid: c::gid_t) via SYS_setgid -> c::c_int
+    }
+
+    unsafe { ret(setgid(gid.as_raw())) }
+}
+
+#[cfg(linux_kernel)]
+#[inline]
+pub(crate) fn setresgid_thread(
+    rgid: crate::ugid::Gid,
+    egid: crate::ugid::Gid,
+    sgid: crate::ugid::Gid,
+) -> io::Result<()> {
+    #[cfg(any(target_arch = "x86", target_arch = "arm", target_arch = "sparc"))]
+    const SYS: c::c_long = c::SYS_setresgid32 as c::c_long;
+    #[cfg(not(any(target_arch = "x86", target_arch = "arm", target_arch = "sparc")))]
+    const SYS: c::c_long = c::SYS_setresgid as c::c_long;
+
+    syscall! {
+        fn setresgid(rgid: c::gid_t, egid: c::gid_t, sgid: c::gid_t) via SYS -> c::c_int
+    }
+
+    unsafe { ret(setresgid(rgid.as_raw(), egid.as_raw(), sgid.as_raw())) }
+}
+
+// TODO: This could be de-multiplexed.
+#[cfg(linux_kernel)]
+pub(crate) unsafe fn futex(
+    uaddr: *mut u32,
+    op: FutexOperation,
+    flags: FutexFlags,
+    val: u32,
+    utime: *const Timespec,
+    uaddr2: *mut u32,
+    val3: u32,
+) -> io::Result<usize> {
+    #[cfg(all(
+        target_pointer_width = "32",
+        not(any(target_arch = "aarch64", target_arch = "x86_64"))
+    ))]
+    {
+        // TODO: Upstream this to the libc crate.
+        #[allow(non_upper_case_globals)]
+        const SYS_futex_time64: i32 = linux_raw_sys::general::__NR_futex_time64 as i32;
+
+        syscall! {
+            fn futex_time64(
+                uaddr: *mut u32,
+                futex_op: c::c_int,
+                val: u32,
+                timeout: *const Timespec,
+                uaddr2: *mut u32,
+                val3: u32
+            ) via SYS_futex_time64 -> c::ssize_t
+        }
+
+        ret_usize(futex_time64(
+            uaddr,
+            op as i32 | flags.bits() as i32,
+            val,
+            utime,
+            uaddr2,
+            val3,
+        ))
+        .or_else(|err| {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            if err == io::Errno::NOSYS {
+                futex_old(uaddr, op, flags, val, utime, uaddr2, val3)
+            } else {
+                Err(err)
+            }
+        })
+    }
+
+    #[cfg(any(
+        target_pointer_width = "64",
+        target_arch = "aarch64",
+        target_arch = "x86_64"
+    ))]
+    {
+        syscall! {
+            fn futex(
+                uaddr: *mut u32,
+                futex_op: c::c_int,
+                val: u32,
+                timeout: *const linux_raw_sys::general::__kernel_timespec,
+                uaddr2: *mut u32,
+                val3: u32
+            ) via SYS_futex -> c::c_long
+        }
+
+        ret_usize(futex(
+            uaddr,
+            op as i32 | flags.bits() as i32,
+            val,
+            utime.cast(),
+            uaddr2,
+            val3,
+        ) as isize)
+    }
+}
+
+#[cfg(linux_kernel)]
+#[cfg(all(
+    target_pointer_width = "32",
+    not(any(target_arch = "aarch64", target_arch = "x86_64"))
+))]
+unsafe fn futex_old(
+    uaddr: *mut u32,
+    op: FutexOperation,
+    flags: FutexFlags,
+    val: u32,
+    utime: *const Timespec,
+    uaddr2: *mut u32,
+    val3: u32,
+) -> io::Result<usize> {
+    syscall! {
+        fn futex(
+            uaddr: *mut u32,
+            futex_op: c::c_int,
+            val: u32,
+            timeout: *const linux_raw_sys::general::__kernel_old_timespec,
+            uaddr2: *mut u32,
+            val3: u32
+        ) via SYS_futex -> c::c_long
+    }
+
+    let old_utime = linux_raw_sys::general::__kernel_old_timespec {
+        tv_sec: (*utime).tv_sec.try_into().map_err(|_| io::Errno::INVAL)?,
+        tv_nsec: (*utime).tv_nsec.try_into().map_err(|_| io::Errno::INVAL)?,
+    };
+    ret_usize(futex(
+        uaddr,
+        op as i32 | flags.bits() as i32,
+        val,
+        &old_utime,
+        uaddr2,
+        val3,
+    ) as isize)
+}
diff --git a/vendor/rustix/src/backend/libc/time/mod.rs b/vendor/rustix/src/backend/libc/time/mod.rs
new file mode 100644
index 0000000..bff7fd5
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/time/mod.rs
@@ -0,0 +1,3 @@
+#[cfg(not(windows))]
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/libc/time/syscalls.rs b/vendor/rustix/src/backend/libc/time/syscalls.rs
new file mode 100644
index 0000000..6b1c9fd
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/time/syscalls.rs
@@ -0,0 +1,452 @@
+//! libc syscalls supporting `rustix::time`.
+
+use crate::backend::c;
+use crate::backend::conv::ret;
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(feature = "time")]
+#[cfg(any(all(target_env = "gnu", fix_y2038), not(fix_y2038)))]
+use crate::backend::time::types::LibcItimerspec;
+#[cfg(not(target_os = "wasi"))]
+use crate::clockid::{ClockId, DynamicClockId};
+use crate::io;
+#[cfg(all(target_env = "gnu", fix_y2038))]
+use crate::timespec::LibcTimespec;
+use crate::timespec::Timespec;
+use core::mem::MaybeUninit;
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(feature = "time")]
+use {
+    crate::backend::conv::{borrowed_fd, ret_owned_fd},
+    crate::fd::{BorrowedFd, OwnedFd},
+    crate::time::{Itimerspec, TimerfdClockId, TimerfdFlags, TimerfdTimerFlags},
+};
+
+#[cfg(all(target_env = "gnu", fix_y2038))]
+weak!(fn __clock_gettime64(c::clockid_t, *mut LibcTimespec) -> c::c_int);
+#[cfg(all(target_env = "gnu", fix_y2038))]
+weak!(fn __clock_settime64(c::clockid_t, *const LibcTimespec) -> c::c_int);
+#[cfg(all(target_env = "gnu", fix_y2038))]
+weak!(fn __clock_getres64(c::clockid_t, *mut LibcTimespec) -> c::c_int);
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(all(target_env = "gnu", fix_y2038))]
+#[cfg(feature = "time")]
+weak!(fn __timerfd_gettime64(c::c_int, *mut LibcItimerspec) -> c::c_int);
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(all(target_env = "gnu", fix_y2038))]
+#[cfg(feature = "time")]
+weak!(fn __timerfd_settime64(c::c_int, c::c_int, *const LibcItimerspec, *mut LibcItimerspec) -> c::c_int);
+
+#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+#[inline]
+#[must_use]
+pub(crate) fn clock_getres(id: ClockId) -> Timespec {
+    // Old 32-bit version: libc has `clock_getres` but it is not y2038 safe by
+    // default. But there may be a `__clock_getres64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_clock_getres) = __clock_getres64.get() {
+            let mut timespec = MaybeUninit::<LibcTimespec>::uninit();
+            unsafe {
+                ret(libc_clock_getres(id as c::clockid_t, timespec.as_mut_ptr())).unwrap();
+                return timespec.assume_init().into();
+            }
+        }
+
+        clock_getres_old(id)
+    }
+
+    // Main version: libc is y2038 safe and has `clock_getres`.
+    #[cfg(not(fix_y2038))]
+    unsafe {
+        let mut timespec = MaybeUninit::<Timespec>::uninit();
+        let _ = c::clock_getres(id as c::clockid_t, timespec.as_mut_ptr());
+        timespec.assume_init()
+    }
+}
+
+#[cfg(fix_y2038)]
+#[must_use]
+fn clock_getres_old(id: ClockId) -> Timespec {
+    let mut old_timespec = MaybeUninit::<c::timespec>::uninit();
+
+    let old_timespec = unsafe {
+        ret(c::clock_getres(
+            id as c::clockid_t,
+            old_timespec.as_mut_ptr(),
+        ))
+        .unwrap();
+        old_timespec.assume_init()
+    };
+
+    Timespec {
+        tv_sec: old_timespec.tv_sec.into(),
+        tv_nsec: old_timespec.tv_nsec.into(),
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+#[must_use]
+pub(crate) fn clock_gettime(id: ClockId) -> Timespec {
+    // Old 32-bit version: libc has `clock_gettime` but it is not y2038 safe by
+    // default. But there may be a `__clock_gettime64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_clock_gettime) = __clock_gettime64.get() {
+            let mut timespec = MaybeUninit::<LibcTimespec>::uninit();
+            unsafe {
+                ret(libc_clock_gettime(
+                    id as c::clockid_t,
+                    timespec.as_mut_ptr(),
+                ))
+                .unwrap();
+                return timespec.assume_init().into();
+            }
+        }
+
+        clock_gettime_old(id)
+    }
+
+    // Use `.unwrap()` here because `clock_getres` can fail if the clock itself
+    // overflows a number of seconds, but if that happens, the monotonic clocks
+    // can't maintain their invariants, or the realtime clocks aren't properly
+    // configured.
+    #[cfg(not(fix_y2038))]
+    unsafe {
+        let mut timespec = MaybeUninit::<Timespec>::uninit();
+        ret(c::clock_gettime(id as c::clockid_t, timespec.as_mut_ptr())).unwrap();
+        timespec.assume_init()
+    }
+}
+
+#[cfg(fix_y2038)]
+#[must_use]
+fn clock_gettime_old(id: ClockId) -> Timespec {
+    let mut old_timespec = MaybeUninit::<c::timespec>::uninit();
+
+    let old_timespec = unsafe {
+        ret(c::clock_gettime(
+            id as c::clockid_t,
+            old_timespec.as_mut_ptr(),
+        ))
+        .unwrap();
+        old_timespec.assume_init()
+    };
+
+    Timespec {
+        tv_sec: old_timespec.tv_sec.into(),
+        tv_nsec: old_timespec.tv_nsec.into(),
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+pub(crate) fn clock_gettime_dynamic(id: DynamicClockId<'_>) -> io::Result<Timespec> {
+    let id: c::clockid_t = match id {
+        DynamicClockId::Known(id) => id as c::clockid_t,
+
+        #[cfg(linux_kernel)]
+        DynamicClockId::Dynamic(fd) => {
+            use crate::fd::AsRawFd;
+            const CLOCKFD: i32 = 3;
+            (!fd.as_raw_fd() << 3) | CLOCKFD
+        }
+
+        #[cfg(not(linux_kernel))]
+        DynamicClockId::Dynamic(_fd) => {
+            // Dynamic clocks are not supported on this platform.
+            return Err(io::Errno::INVAL);
+        }
+
+        #[cfg(linux_kernel)]
+        DynamicClockId::RealtimeAlarm => c::CLOCK_REALTIME_ALARM,
+
+        #[cfg(linux_kernel)]
+        DynamicClockId::Tai => c::CLOCK_TAI,
+
+        #[cfg(any(
+            freebsdlike,
+            linux_kernel,
+            target_os = "fuchsia",
+            target_os = "openbsd"
+        ))]
+        DynamicClockId::Boottime => c::CLOCK_BOOTTIME,
+
+        #[cfg(any(linux_kernel, target_os = "fuchsia"))]
+        DynamicClockId::BoottimeAlarm => c::CLOCK_BOOTTIME_ALARM,
+    };
+
+    // Old 32-bit version: libc has `clock_gettime` but it is not y2038
+    // safe by default. But there may be a `__clock_gettime64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_clock_gettime) = __clock_gettime64.get() {
+            let mut timespec = MaybeUninit::<LibcTimespec>::uninit();
+            unsafe {
+                ret(libc_clock_gettime(
+                    id as c::clockid_t,
+                    timespec.as_mut_ptr(),
+                ))?;
+
+                return Ok(timespec.assume_init().into());
+            }
+        }
+
+        clock_gettime_dynamic_old(id)
+    }
+
+    // Main version: libc is y2038 safe and has `clock_gettime`.
+    #[cfg(not(fix_y2038))]
+    unsafe {
+        let mut timespec = MaybeUninit::<Timespec>::uninit();
+
+        ret(c::clock_gettime(id as c::clockid_t, timespec.as_mut_ptr()))?;
+
+        Ok(timespec.assume_init())
+    }
+}
+
+#[cfg(fix_y2038)]
+#[inline]
+fn clock_gettime_dynamic_old(id: c::clockid_t) -> io::Result<Timespec> {
+    let mut old_timespec = MaybeUninit::<c::timespec>::uninit();
+
+    let old_timespec = unsafe {
+        ret(c::clock_gettime(
+            id as c::clockid_t,
+            old_timespec.as_mut_ptr(),
+        ))?;
+
+        old_timespec.assume_init()
+    };
+
+    Ok(Timespec {
+        tv_sec: old_timespec.tv_sec.into(),
+        tv_nsec: old_timespec.tv_nsec.into(),
+    })
+}
+
+#[cfg(not(any(
+    target_os = "redox",
+    target_os = "wasi",
+    all(apple, not(target_os = "macos"))
+)))]
+#[inline]
+pub(crate) fn clock_settime(id: ClockId, timespec: Timespec) -> io::Result<()> {
+    // Old 32-bit version: libc has `clock_gettime` but it is not y2038 safe by
+    // default. But there may be a `__clock_settime64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_clock_settime) = __clock_settime64.get() {
+            unsafe {
+                let mut new_timespec = core::mem::zeroed::<LibcTimespec>();
+                new_timespec.tv_sec = timespec.tv_sec;
+                new_timespec.tv_nsec = timespec.tv_nsec as _;
+                return ret(libc_clock_settime(id as c::clockid_t, &new_timespec));
+            }
+        }
+
+        clock_settime_old(id, timespec)
+    }
+
+    // Main version: libc is y2038 safe and has `clock_settime`.
+    #[cfg(not(fix_y2038))]
+    unsafe {
+        ret(c::clock_settime(id as c::clockid_t, &timespec))
+    }
+}
+
+#[cfg(not(any(
+    target_os = "redox",
+    target_os = "wasi",
+    all(apple, not(target_os = "macos"))
+)))]
+#[cfg(fix_y2038)]
+fn clock_settime_old(id: ClockId, timespec: Timespec) -> io::Result<()> {
+    let old_timespec = c::timespec {
+        tv_sec: timespec
+            .tv_sec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        tv_nsec: timespec.tv_nsec as _,
+    };
+
+    unsafe { ret(c::clock_settime(id as c::clockid_t, &old_timespec)) }
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(feature = "time")]
+pub(crate) fn timerfd_create(id: TimerfdClockId, flags: TimerfdFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(c::timerfd_create(id as c::clockid_t, bitflags_bits!(flags))) }
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(feature = "time")]
+pub(crate) fn timerfd_settime(
+    fd: BorrowedFd<'_>,
+    flags: TimerfdTimerFlags,
+    new_value: &Itimerspec,
+) -> io::Result<Itimerspec> {
+    // Old 32-bit version: libc has `timerfd_settime` but it is not y2038 safe
+    // by default. But there may be a `__timerfd_settime64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_timerfd_settime) = __timerfd_settime64.get() {
+            let mut result = MaybeUninit::<LibcItimerspec>::uninit();
+            unsafe {
+                ret(libc_timerfd_settime(
+                    borrowed_fd(fd),
+                    bitflags_bits!(flags),
+                    &new_value.clone().into(),
+                    result.as_mut_ptr(),
+                ))?;
+                return Ok(result.assume_init().into());
+            }
+        }
+
+        timerfd_settime_old(fd, flags, new_value)
+    }
+
+    #[cfg(not(fix_y2038))]
+    unsafe {
+        let mut result = MaybeUninit::<LibcItimerspec>::uninit();
+        ret(c::timerfd_settime(
+            borrowed_fd(fd),
+            bitflags_bits!(flags),
+            new_value,
+            result.as_mut_ptr(),
+        ))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(fix_y2038)]
+#[cfg(feature = "time")]
+fn timerfd_settime_old(
+    fd: BorrowedFd<'_>,
+    flags: TimerfdTimerFlags,
+    new_value: &Itimerspec,
+) -> io::Result<Itimerspec> {
+    let mut old_result = MaybeUninit::<c::itimerspec>::uninit();
+
+    // Convert `new_value` to the old `itimerspec` format.
+    let old_new_value = c::itimerspec {
+        it_interval: c::timespec {
+            tv_sec: new_value
+                .it_interval
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: new_value
+                .it_interval
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::INVAL)?,
+        },
+        it_value: c::timespec {
+            tv_sec: new_value
+                .it_value
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: new_value
+                .it_value
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::INVAL)?,
+        },
+    };
+
+    let old_result = unsafe {
+        ret(c::timerfd_settime(
+            borrowed_fd(fd),
+            bitflags_bits!(flags),
+            &old_new_value,
+            old_result.as_mut_ptr(),
+        ))?;
+        old_result.assume_init()
+    };
+
+    Ok(Itimerspec {
+        it_interval: Timespec {
+            tv_sec: old_result
+                .it_interval
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: old_result.it_interval.tv_nsec as _,
+        },
+        it_value: Timespec {
+            tv_sec: old_result
+                .it_interval
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: old_result.it_interval.tv_nsec as _,
+        },
+    })
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(feature = "time")]
+pub(crate) fn timerfd_gettime(fd: BorrowedFd<'_>) -> io::Result<Itimerspec> {
+    // Old 32-bit version: libc has `timerfd_gettime` but it is not y2038 safe
+    // by default. But there may be a `__timerfd_gettime64` we can use.
+    #[cfg(fix_y2038)]
+    {
+        #[cfg(target_env = "gnu")]
+        if let Some(libc_timerfd_gettime) = __timerfd_gettime64.get() {
+            let mut result = MaybeUninit::<LibcItimerspec>::uninit();
+            unsafe {
+                ret(libc_timerfd_gettime(borrowed_fd(fd), result.as_mut_ptr()))?;
+                return Ok(result.assume_init().into());
+            }
+        }
+
+        timerfd_gettime_old(fd)
+    }
+
+    #[cfg(not(fix_y2038))]
+    unsafe {
+        let mut result = MaybeUninit::<LibcItimerspec>::uninit();
+        ret(c::timerfd_gettime(borrowed_fd(fd), result.as_mut_ptr()))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(fix_y2038)]
+#[cfg(feature = "time")]
+fn timerfd_gettime_old(fd: BorrowedFd<'_>) -> io::Result<Itimerspec> {
+    let mut old_result = MaybeUninit::<c::itimerspec>::uninit();
+
+    let old_result = unsafe {
+        ret(c::timerfd_gettime(borrowed_fd(fd), old_result.as_mut_ptr()))?;
+        old_result.assume_init()
+    };
+
+    Ok(Itimerspec {
+        it_interval: Timespec {
+            tv_sec: old_result
+                .it_interval
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: old_result.it_interval.tv_nsec as _,
+        },
+        it_value: Timespec {
+            tv_sec: old_result
+                .it_interval
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: old_result.it_interval.tv_nsec as _,
+        },
+    })
+}
diff --git a/vendor/rustix/src/backend/libc/time/types.rs b/vendor/rustix/src/backend/libc/time/types.rs
new file mode 100644
index 0000000..5254c6b
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/time/types.rs
@@ -0,0 +1,177 @@
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+use crate::backend::c;
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(fix_y2038)]
+use crate::timespec::LibcTimespec;
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(fix_y2038)]
+use crate::timespec::Timespec;
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+use bitflags::bitflags;
+
+/// `struct itimerspec` for use with [`timerfd_gettime`] and
+/// [`timerfd_settime`].
+///
+/// [`timerfd_gettime`]: crate::time::timerfd_gettime
+/// [`timerfd_settime`]: crate::time::timerfd_settime
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(not(fix_y2038))]
+pub type Itimerspec = c::itimerspec;
+
+/// `struct itimerspec` for use with [`timerfd_gettime`] and
+/// [`timerfd_settime`].
+///
+/// [`timerfd_gettime`]: crate::time::timerfd_gettime
+/// [`timerfd_settime`]: crate::time::timerfd_settime
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(fix_y2038)]
+#[repr(C)]
+#[derive(Debug, Clone)]
+pub struct Itimerspec {
+    /// The interval of an interval timer.
+    pub it_interval: Timespec,
+    /// Time remaining in the current interval.
+    pub it_value: Timespec,
+}
+
+/// On most platforms, `LibcItimerspec` is just `Itimerspec`.
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(not(fix_y2038))]
+pub(crate) type LibcItimerspec = Itimerspec;
+
+/// On 32-bit glibc platforms, `LibcTimespec` differs from `Timespec`, so we
+/// define our own struct, with bidirectional `From` impls.
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(fix_y2038)]
+#[repr(C)]
+#[derive(Debug, Clone)]
+pub(crate) struct LibcItimerspec {
+    pub it_interval: LibcTimespec,
+    pub it_value: LibcTimespec,
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(fix_y2038)]
+impl From<LibcItimerspec> for Itimerspec {
+    #[inline]
+    fn from(t: LibcItimerspec) -> Self {
+        Self {
+            it_interval: t.it_interval.into(),
+            it_value: t.it_value.into(),
+        }
+    }
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[cfg(fix_y2038)]
+impl From<Itimerspec> for LibcItimerspec {
+    #[inline]
+    fn from(t: Itimerspec) -> Self {
+        Self {
+            it_interval: t.it_interval.into(),
+            it_value: t.it_value.into(),
+        }
+    }
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+bitflags! {
+    /// `TFD_*` flags for use with [`timerfd_create`].
+    ///
+    /// [`timerfd_create`]: crate::time::timerfd_create
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct TimerfdFlags: u32 {
+        /// `TFD_NONBLOCK`
+        #[doc(alias = "TFD_NONBLOCK")]
+        const NONBLOCK = bitcast!(c::TFD_NONBLOCK);
+
+        /// `TFD_CLOEXEC`
+        #[doc(alias = "TFD_CLOEXEC")]
+        const CLOEXEC = bitcast!(c::TFD_CLOEXEC);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+bitflags! {
+    /// `TFD_TIMER_*` flags for use with [`timerfd_settime`].
+    ///
+    /// [`timerfd_settime`]: crate::time::timerfd_settime
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct TimerfdTimerFlags: u32 {
+        /// `TFD_TIMER_ABSTIME`
+        #[doc(alias = "TFD_TIMER_ABSTIME")]
+        const ABSTIME = bitcast!(c::TFD_TIMER_ABSTIME);
+
+        /// `TFD_TIMER_CANCEL_ON_SET`
+        #[cfg(linux_kernel)]
+        #[doc(alias = "TFD_TIMER_CANCEL_ON_SET")]
+        const CANCEL_ON_SET = bitcast!(c::TFD_TIMER_CANCEL_ON_SET);
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `CLOCK_*` constants for use with [`timerfd_create`].
+///
+/// [`timerfd_create`]: crate::time::timerfd_create
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[repr(u32)]
+#[non_exhaustive]
+pub enum TimerfdClockId {
+    /// `CLOCK_REALTIME`—A clock that tells the “real” time.
+    ///
+    /// This is a clock that tells the amount of time elapsed since the Unix
+    /// epoch, 1970-01-01T00:00:00Z. The clock is externally settable, so it is
+    /// not monotonic. Successive reads may see decreasing times, so it isn't
+    /// reliable for measuring durations.
+    #[doc(alias = "CLOCK_REALTIME")]
+    Realtime = bitcast!(c::CLOCK_REALTIME),
+
+    /// `CLOCK_MONOTONIC`—A clock that tells an abstract time.
+    ///
+    /// Unlike `Realtime`, this clock is not based on a fixed known epoch, so
+    /// individual times aren't meaningful. However, since it isn't settable,
+    /// it is reliable for measuring durations.
+    ///
+    /// This clock does not advance while the system is suspended; see
+    /// `Boottime` for a clock that does.
+    #[doc(alias = "CLOCK_MONOTONIC")]
+    Monotonic = bitcast!(c::CLOCK_MONOTONIC),
+
+    /// `CLOCK_BOOTTIME`—Like `Monotonic`, but advances while suspended.
+    ///
+    /// This clock is similar to `Monotonic`, but does advance while the system
+    /// is suspended.
+    #[doc(alias = "CLOCK_BOOTTIME")]
+    Boottime = bitcast!(c::CLOCK_BOOTTIME),
+
+    /// `CLOCK_REALTIME_ALARM`—Like `Realtime`, but wakes a suspended system.
+    ///
+    /// This clock is like `Realtime`, but can wake up a suspended system.
+    ///
+    /// Use of this clock requires the `CAP_WAKE_ALARM` Linux capability.
+    #[doc(alias = "CLOCK_REALTIME_ALARM")]
+    RealtimeAlarm = bitcast!(c::CLOCK_REALTIME_ALARM),
+
+    /// `CLOCK_BOOTTIME_ALARM`—Like `Boottime`, but wakes a suspended system.
+    ///
+    /// This clock is like `Boottime`, but can wake up a suspended system.
+    ///
+    /// Use of this clock requires the `CAP_WAKE_ALARM` Linux capability.
+    #[doc(alias = "CLOCK_BOOTTIME_ALARM")]
+    BoottimeAlarm = bitcast!(c::CLOCK_BOOTTIME_ALARM),
+}
+
+#[cfg(any(linux_kernel, target_os = "fuchsia"))]
+#[test]
+fn test_types() {
+    assert_eq_size!(TimerfdFlags, c::c_int);
+    assert_eq_size!(TimerfdTimerFlags, c::c_int);
+}
diff --git a/vendor/rustix/src/backend/libc/ugid/mod.rs b/vendor/rustix/src/backend/libc/ugid/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/ugid/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/libc/ugid/syscalls.rs b/vendor/rustix/src/backend/libc/ugid/syscalls.rs
new file mode 100644
index 0000000..0d3f622
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/ugid/syscalls.rs
@@ -0,0 +1,42 @@
+use crate::backend::c;
+use crate::ugid::{Gid, Uid};
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+#[must_use]
+pub(crate) fn getuid() -> Uid {
+    unsafe {
+        let uid = c::getuid();
+        Uid::from_raw(uid)
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+#[must_use]
+pub(crate) fn geteuid() -> Uid {
+    unsafe {
+        let uid = c::geteuid();
+        Uid::from_raw(uid)
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+#[must_use]
+pub(crate) fn getgid() -> Gid {
+    unsafe {
+        let gid = c::getgid();
+        Gid::from_raw(gid)
+    }
+}
+
+#[cfg(not(target_os = "wasi"))]
+#[inline]
+#[must_use]
+pub(crate) fn getegid() -> Gid {
+    unsafe {
+        let gid = c::getegid();
+        Gid::from_raw(gid)
+    }
+}
diff --git a/vendor/rustix/src/backend/libc/winsock_c.rs b/vendor/rustix/src/backend/libc/winsock_c.rs
new file mode 100644
index 0000000..ee2704a
--- /dev/null
+++ b/vendor/rustix/src/backend/libc/winsock_c.rs
@@ -0,0 +1,59 @@
+//! Adapt the Winsock API to resemble a POSIX-style libc API.
+
+#![allow(unused_imports)]
+#![allow(non_camel_case_types)]
+#![allow(dead_code)]
+
+use windows_sys::Win32::Networking::WinSock;
+
+// Define the basic C types. With Rust 1.64, we can use these from `core::ffi`.
+pub(crate) type c_schar = i8;
+pub(crate) type c_uchar = u8;
+pub(crate) type c_short = i16;
+pub(crate) type c_ushort = u16;
+pub(crate) type c_int = i32;
+pub(crate) type c_uint = u32;
+pub(crate) type c_longlong = i64;
+pub(crate) type c_ulonglong = u64;
+pub(crate) type ssize_t = isize;
+pub(crate) type c_char = i8;
+pub(crate) type c_long = i32;
+pub(crate) type c_ulong = u32;
+pub(crate) use core::ffi::c_void;
+
+// windows-sys declares these constants as u16. For better compatibility
+// with Unix-family APIs, redeclare them as u32.
+pub(crate) const AF_INET: i32 = WinSock::AF_INET as _;
+pub(crate) const AF_INET6: i32 = WinSock::AF_INET6 as _;
+pub(crate) const AF_UNSPEC: i32 = WinSock::AF_UNSPEC as _;
+
+// Include the contents of `WinSock`, renaming as needed to match POSIX.
+//
+// Use `WSA_E_CANCELLED` for `ECANCELED` instead of `WSAECANCELLED`, because
+// `WSAECANCELLED` will be removed in the future.
+// <https://docs.microsoft.com/en-us/windows/win32/api/ws2spi/nc-ws2spi-lpnsplookupserviceend#remarks>
+pub(crate) use WinSock::{
+    closesocket as close, ioctlsocket as ioctl, WSAPoll as poll, ADDRESS_FAMILY as sa_family_t,
+    ADDRINFOA as addrinfo, IN6_ADDR as in6_addr, IN_ADDR as in_addr, IPV6_MREQ as ipv6_mreq,
+    IP_MREQ as ip_mreq, LINGER as linger, SD_BOTH as SHUT_RDWR, SD_RECEIVE as SHUT_RD,
+    SD_SEND as SHUT_WR, SOCKADDR as sockaddr, SOCKADDR_IN as sockaddr_in,
+    SOCKADDR_IN6 as sockaddr_in6, SOCKADDR_STORAGE as sockaddr_storage, WSAEACCES as EACCES,
+    WSAEADDRINUSE as EADDRINUSE, WSAEADDRNOTAVAIL as EADDRNOTAVAIL,
+    WSAEAFNOSUPPORT as EAFNOSUPPORT, WSAEALREADY as EALREADY, WSAEBADF as EBADF,
+    WSAECONNABORTED as ECONNABORTED, WSAECONNREFUSED as ECONNREFUSED, WSAECONNRESET as ECONNRESET,
+    WSAEDESTADDRREQ as EDESTADDRREQ, WSAEDISCON as EDISCON, WSAEDQUOT as EDQUOT,
+    WSAEFAULT as EFAULT, WSAEHOSTDOWN as EHOSTDOWN, WSAEHOSTUNREACH as EHOSTUNREACH,
+    WSAEINPROGRESS as EINPROGRESS, WSAEINTR as EINTR, WSAEINVAL as EINVAL,
+    WSAEINVALIDPROCTABLE as EINVALIDPROCTABLE, WSAEINVALIDPROVIDER as EINVALIDPROVIDER,
+    WSAEISCONN as EISCONN, WSAELOOP as ELOOP, WSAEMFILE as EMFILE, WSAEMSGSIZE as EMSGSIZE,
+    WSAENAMETOOLONG as ENAMETOOLONG, WSAENETDOWN as ENETDOWN, WSAENETRESET as ENETRESET,
+    WSAENETUNREACH as ENETUNREACH, WSAENOBUFS as ENOBUFS, WSAENOMORE as ENOMORE,
+    WSAENOPROTOOPT as ENOPROTOOPT, WSAENOTCONN as ENOTCONN, WSAENOTEMPTY as ENOTEMPTY,
+    WSAENOTSOCK as ENOTSOCK, WSAEOPNOTSUPP as EOPNOTSUPP, WSAEPFNOSUPPORT as EPFNOSUPPORT,
+    WSAEPROCLIM as EPROCLIM, WSAEPROTONOSUPPORT as EPROTONOSUPPORT, WSAEPROTOTYPE as EPROTOTYPE,
+    WSAEPROVIDERFAILEDINIT as EPROVIDERFAILEDINIT, WSAEREFUSED as EREFUSED, WSAEREMOTE as EREMOTE,
+    WSAESHUTDOWN as ESHUTDOWN, WSAESOCKTNOSUPPORT as ESOCKTNOSUPPORT, WSAESTALE as ESTALE,
+    WSAETIMEDOUT as ETIMEDOUT, WSAETOOMANYREFS as ETOOMANYREFS, WSAEUSERS as EUSERS,
+    WSAEWOULDBLOCK as EWOULDBLOCK, WSAEWOULDBLOCK as EAGAIN, WSAPOLLFD as pollfd,
+    WSA_E_CANCELLED as ECANCELED, *,
+};
diff --git a/vendor/rustix/src/backend/linux_raw/arch/aarch64.rs b/vendor/rustix/src/backend/linux_raw/arch/aarch64.rs
new file mode 100644
index 0000000..d4cf247
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/aarch64.rs
@@ -0,0 +1,268 @@
+//! aarch64 Linux system calls.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use core::arch::asm;
+
+#[cfg(target_pointer_width = "32")]
+compile_error!("arm64-ilp32 is not supported yet");
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        lateout("x0") r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        in("x0") a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        in("x2") a2.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        in("x2") a2.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        in("x2") a2.to_asm(),
+        in("x3") a3.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        in("x2") a2.to_asm(),
+        in("x3") a3.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        in("x2") a2.to_asm(),
+        in("x3") a3.to_asm(),
+        in("x4") a4.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        in("x2") a2.to_asm(),
+        in("x3") a3.to_asm(),
+        in("x4") a4.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        in("x2") a2.to_asm(),
+        in("x3") a3.to_asm(),
+        in("x4") a4.to_asm(),
+        in("x5") a5.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("x8") nr.to_asm(),
+        inlateout("x0") a0.to_asm() => r0,
+        in("x1") a1.to_asm(),
+        in("x2") a2.to_asm(),
+        in("x3") a3.to_asm(),
+        in("x4") a4.to_asm(),
+        in("x5") a5.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/arm.rs b/vendor/rustix/src/backend/linux_raw/arch/arm.rs
new file mode 100644
index 0000000..77c1f82
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/arm.rs
@@ -0,0 +1,265 @@
+//! arm Linux system calls.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        lateout("r0") r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        in("r0") a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        in("r4") a4.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        in("r4") a4.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        in("r4") a4.to_asm(),
+        in("r5") a5.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "svc 0",
+        in("r7") nr.to_asm(),
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        in("r4") a4.to_asm(),
+        in("r5") a5.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/mips.rs b/vendor/rustix/src/backend/linux_raw/arch/mips.rs
new file mode 100644
index 0000000..37932e0
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/mips.rs
@@ -0,0 +1,543 @@
+//! mipsel Linux system calls.
+//!
+//! On mipsel, Linux indicates success or failure using `$a3` rather
+//! than by returning a negative error code as most other architectures do.
+//!
+//! Mips-family platforms have a special calling convention for `__NR_pipe`,
+//! however we use `__NR_pipe2` instead to avoid having to implement it.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, A6, R0,
+};
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "syscall",
+        in("$2" /*$v0*/) nr.to_asm(),
+        in("$4" /*$a0*/) a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "sw {}, 20($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        in(reg) a5.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "sw {}, 20($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        in(reg) a5.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall7_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+    a6: ArgReg<'_, A6>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "sw {}, 20($sp)",
+        "sw {}, 24($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        in(reg) a5.to_asm(),
+        in(reg) a6.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/mips32r6.rs b/vendor/rustix/src/backend/linux_raw/arch/mips32r6.rs
new file mode 100644
index 0000000..c2d9244
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/mips32r6.rs
@@ -0,0 +1,543 @@
+//! mipsisa32r6el Linux system calls.
+//!
+//! On mipsisa32r6el, Linux indicates success or failure using `$a3` rather
+//! than by returning a negative error code as most other architectures do.
+//!
+//! Mips-family platforms have a special calling convention for `__NR_pipe`,
+//! however we use `__NR_pipe2` instead to avoid having to implement it.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, A6, R0,
+};
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "syscall",
+        in("$2" /*$v0*/) nr.to_asm(),
+        in("$4" /*$a0*/) a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "sw {}, 20($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        in(reg) a5.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "sw {}, 20($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        in(reg) a5.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall7_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+    a6: ArgReg<'_, A6>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        ".set noat",
+        "subu $sp, 32",
+        "sw {}, 16($sp)",
+        "sw {}, 20($sp)",
+        "sw {}, 24($sp)",
+        "syscall",
+        "addu $sp, 32",
+        ".set at",
+        in(reg) a4.to_asm(),
+        in(reg) a5.to_asm(),
+        in(reg) a6.to_asm(),
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$t0*/) _,
+        lateout("$9" /*$t1*/) _,
+        lateout("$10" /*$t2*/) _,
+        lateout("$11" /*$t3*/) _,
+        lateout("$12" /*$t4*/) _,
+        lateout("$13" /*$t5*/) _,
+        lateout("$14" /*$t6*/) _,
+        lateout("$15" /*$t7*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/mips64.rs b/vendor/rustix/src/backend/linux_raw/arch/mips64.rs
new file mode 100644
index 0000000..244daf3
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/mips64.rs
@@ -0,0 +1,466 @@
+//! mips64el Linux system calls.
+//!
+//! On mips64el, Linux indicates success or failure using `$a3` (`$7`) rather
+//! than by returning a negative error code as most other architectures do.
+//!
+//! Mips-family platforms have a special calling convention for `__NR_pipe`,
+//! however we use `__NR_pipe2` instead to avoid having to implement it.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "syscall",
+        in("$2" /*$v0*/) nr.to_asm(),
+        in("$4" /*$a0*/) a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        inlateout("$8" /*$a4*/) a4.to_asm() => _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        inlateout("$8" /*$a4*/) a4.to_asm() => _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        inlateout("$8" /*$a4*/) a4.to_asm() => _,
+        inlateout("$9" /*$a5*/) a5.to_asm() => _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        inlateout("$8" /*$a4*/) a4.to_asm() => _,
+        inlateout("$9" /*$a5*/) a5.to_asm() => _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/mips64r6.rs b/vendor/rustix/src/backend/linux_raw/arch/mips64r6.rs
new file mode 100644
index 0000000..8c06d9e
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/mips64r6.rs
@@ -0,0 +1,470 @@
+//! mipsisa64r6el Linux system calls.
+//!
+//! On mipsisa64r6el, Linux indicates success or failure using `$a3` (`$7`)
+//! rather than by returning a negative error code as most other architectures
+//! do.
+//!
+//! Mips-family platforms have a special calling convention for `__NR_pipe`,
+//! however we use `__NR_pipe2` instead to avoid having to implement it.
+//!
+//! Note that MIPS R6 inline assembly currently doesn't differ from MIPS,
+//! because no explicit call of R6-only or R2-only instructions exist here.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "syscall",
+        in("$2" /*$v0*/) nr.to_asm(),
+        in("$4" /*$a0*/) a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        lateout("$7" /*$a3*/) err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        lateout("$8" /*$a4*/) _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        inlateout("$8" /*$a4*/) a4.to_asm() => _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        inlateout("$8" /*$a4*/) a4.to_asm() => _,
+        lateout("$9" /*$a5*/) _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        inlateout("$8" /*$a4*/) a4.to_asm() => _,
+        inlateout("$9" /*$a5*/) a5.to_asm() => _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let x0;
+    let err: usize;
+    asm!(
+        "syscall",
+        inlateout("$2" /*$v0*/) nr.to_asm() => x0,
+        in("$4" /*$a0*/) a0.to_asm(),
+        in("$5" /*$a1*/) a1.to_asm(),
+        in("$6" /*$a2*/) a2.to_asm(),
+        inlateout("$7" /*$a3*/) a3.to_asm() => err,
+        inlateout("$8" /*$a4*/) a4.to_asm() => _,
+        inlateout("$9" /*$a5*/) a5.to_asm() => _,
+        lateout("$10" /*$a6*/) _,
+        lateout("$11" /*$a7*/) _,
+        lateout("$12" /*$t0*/) _,
+        lateout("$13" /*$t1*/) _,
+        lateout("$14" /*$t2*/) _,
+        lateout("$15" /*$t3*/) _,
+        lateout("$24" /*$t8*/) _,
+        lateout("$25" /*$t9*/) _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(if err != 0 {
+        (x0 as usize).wrapping_neg() as *mut _
+    } else {
+        x0
+    })
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/mod.rs b/vendor/rustix/src/backend/linux_raw/arch/mod.rs
new file mode 100644
index 0000000..ac9e25f
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/mod.rs
@@ -0,0 +1,317 @@
+//! Architecture-specific syscall code.
+//!
+//! This module also has a `choose` submodule which chooses a scheme and is
+//! what most of the `rustix` syscalls use.
+//!
+//! Compilers should really have intrinsics for making system calls. They're
+//! much like regular calls, with custom calling conventions, and calling
+//! conventions are otherwise the compiler's job. But for now, use inline asm.
+//!
+//! The calling conventions for Linux syscalls are [documented here].
+//!
+//! [documented here]: https://man7.org/linux/man-pages/man2/syscall.2.html
+//!
+//! # Safety
+//!
+//! This contains the inline `asm` statements performing the syscall
+//! instructions.
+
+#![allow(unsafe_code)]
+#![cfg_attr(not(feature = "all-apis"), allow(unused_imports))]
+// We'll use as many arguments as syscalls need.
+#![allow(clippy::too_many_arguments)]
+
+// These functions always use the machine's syscall instruction, even when it
+// isn't the fastest option available.
+#[cfg_attr(target_arch = "aarch64", path = "aarch64.rs")]
+#[cfg_attr(all(target_arch = "arm", not(thumb_mode)), path = "arm.rs")]
+#[cfg_attr(all(target_arch = "arm", thumb_mode), path = "thumb.rs")]
+#[cfg_attr(target_arch = "mips", path = "mips.rs")]
+#[cfg_attr(target_arch = "mips32r6", path = "mips32r6.rs")]
+#[cfg_attr(target_arch = "mips64", path = "mips64.rs")]
+#[cfg_attr(target_arch = "mips64r6", path = "mips64r6.rs")]
+#[cfg_attr(target_arch = "powerpc64", path = "powerpc64.rs")]
+#[cfg_attr(target_arch = "riscv64", path = "riscv64.rs")]
+#[cfg_attr(target_arch = "x86", path = "x86.rs")]
+#[cfg_attr(target_arch = "x86_64", path = "x86_64.rs")]
+pub(in crate::backend) mod asm;
+
+// On most architectures, the architecture syscall instruction is fast, so use
+// it directly.
+#[cfg(any(
+    target_arch = "arm",
+    target_arch = "aarch64",
+    target_arch = "mips",
+    target_arch = "mips32r6",
+    target_arch = "mips64",
+    target_arch = "mips64r6",
+    target_arch = "powerpc64",
+    target_arch = "riscv64",
+    target_arch = "x86_64",
+))]
+pub(in crate::backend) use self::asm as choose;
+
+// On 32-bit x86, use vDSO wrappers for all syscalls. We could use the
+// architecture syscall instruction (`int 0x80`), but the vDSO kernel_vsyscall
+// mechanism is much faster.
+#[cfg(target_arch = "x86")]
+pub(in crate::backend) use super::vdso_wrappers::x86_via_vdso as choose;
+
+// This would be the code for always using `int 0x80` on 32-bit x86.
+//#[cfg(target_arch = "x86")]
+//pub(in crate::backend) use self::asm as choose;
+
+// Macros for invoking system calls.
+//
+// These factor out:
+//  - Calling `nr` on the syscall number to convert it into `SyscallNumber`.
+//  - Calling `.into()` on each of the arguments to convert them into `ArgReg`.
+//  - Qualifying the `syscall*` and `__NR_*` identifiers.
+//  - Counting the number of arguments.
+macro_rules! syscall {
+    ($nr:ident) => {
+        $crate::backend::arch::choose::syscall0($crate::backend::reg::nr(
+            linux_raw_sys::general::$nr,
+        ))
+    };
+
+    ($nr:ident, $a0:expr) => {
+        $crate::backend::arch::choose::syscall1(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr) => {
+        $crate::backend::arch::choose::syscall2(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr) => {
+        $crate::backend::arch::choose::syscall3(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr) => {
+        $crate::backend::arch::choose::syscall4(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
+        $crate::backend::arch::choose::syscall5(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr) => {
+        $crate::backend::arch::choose::syscall6(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+            $a5.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr) => {
+        $crate::backend::arch::choose::syscall7(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+            $a5.into(),
+            $a6.into(),
+        )
+    };
+}
+
+// Macro to invoke a syscall that always uses direct assembly, rather than the
+// vDSO. Useful when still finding the vDSO.
+#[allow(unused_macros)]
+macro_rules! syscall_always_asm {
+    ($nr:ident) => {
+        $crate::backend::arch::asm::syscall0($crate::backend::reg::nr(linux_raw_sys::general::$nr))
+    };
+
+    ($nr:ident, $a0:expr) => {
+        $crate::backend::arch::asm::syscall1(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr) => {
+        $crate::backend::arch::asm::syscall2(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr) => {
+        $crate::backend::arch::asm::syscall3(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr) => {
+        $crate::backend::arch::asm::syscall4(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
+        $crate::backend::arch::asm::syscall5(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr) => {
+        $crate::backend::arch::asm::syscall6(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+            $a5.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr) => {
+        $crate::backend::arch::asm::syscall7(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+            $a5.into(),
+            $a6.into(),
+        )
+    };
+}
+
+/// Like `syscall`, but adds the `readonly` attribute to the inline asm, which
+/// indicates that the syscall does not mutate any memory.
+macro_rules! syscall_readonly {
+    ($nr:ident) => {
+        $crate::backend::arch::choose::syscall0_readonly($crate::backend::reg::nr(
+            linux_raw_sys::general::$nr,
+        ))
+    };
+
+    ($nr:ident, $a0:expr) => {
+        $crate::backend::arch::choose::syscall1_readonly(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr) => {
+        $crate::backend::arch::choose::syscall2_readonly(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr) => {
+        $crate::backend::arch::choose::syscall3_readonly(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr) => {
+        $crate::backend::arch::choose::syscall4_readonly(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr) => {
+        $crate::backend::arch::choose::syscall5_readonly(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr) => {
+        $crate::backend::arch::choose::syscall6_readonly(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+            $a5.into(),
+        )
+    };
+
+    ($nr:ident, $a0:expr, $a1:expr, $a2:expr, $a3:expr, $a4:expr, $a5:expr, $a6:expr) => {
+        $crate::backend::arch::choose::syscall7_readonly(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+            $a1.into(),
+            $a2.into(),
+            $a3.into(),
+            $a4.into(),
+            $a5.into(),
+            $a6.into(),
+        )
+    };
+}
+
+/// Like `syscall`, but indicates that the syscall does not return.
+#[cfg(feature = "runtime")]
+macro_rules! syscall_noreturn {
+    ($nr:ident, $a0:expr) => {
+        $crate::backend::arch::choose::syscall1_noreturn(
+            $crate::backend::reg::nr(linux_raw_sys::general::$nr),
+            $a0.into(),
+        )
+    };
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/powerpc64.rs b/vendor/rustix/src/backend/linux_raw/arch/powerpc64.rs
new file mode 100644
index 0000000..14866c2
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/powerpc64.rs
@@ -0,0 +1,413 @@
+//! powerpc64le Linux system calls.
+//!
+//! On powerpc64le, Linux indicates success or failure using `cr0.SO` rather
+//! than by returning a negative error code as most other architectures do. In
+//! theory we could immediately translate this into a `Result`, and it'd save a
+//! few branches. And in theory we could have specialized sequences for use
+//! with syscalls that are known to never fail. However, those would require
+//! more extensive changes in rustix's platform-independent code. For now, we
+//! check the flag and negate the error value to make PowerPC64 look like other
+//! architectures.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        lateout("r3") r0,
+        lateout("r4") _,
+        lateout("r5") _,
+        lateout("r6") _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        lateout("r4") _,
+        lateout("r5") _,
+        lateout("r6") _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        lateout("r4") _,
+        lateout("r5") _,
+        lateout("r6") _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "sc",
+        in("r0") nr.to_asm(),
+        in("r3") a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        lateout("r5") _,
+        lateout("r6") _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        lateout("r5") _,
+        lateout("r6") _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        inlateout("r5") a2.to_asm() => _,
+        lateout("r6") _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        inlateout("r5") a2.to_asm() => _,
+        lateout("r6") _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        inlateout("r5") a2.to_asm() => _,
+        inlateout("r6") a3.to_asm() => _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        inlateout("r5") a2.to_asm() => _,
+        inlateout("r6") a3.to_asm() => _,
+        lateout("r7") _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        inlateout("r5") a2.to_asm() => _,
+        inlateout("r6") a3.to_asm() => _,
+        inlateout("r7") a4.to_asm() => _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        inlateout("r5") a2.to_asm() => _,
+        inlateout("r6") a3.to_asm() => _,
+        inlateout("r7") a4.to_asm() => _,
+        lateout("r8") _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        inlateout("r5") a2.to_asm() => _,
+        inlateout("r6") a3.to_asm() => _,
+        inlateout("r7") a4.to_asm() => _,
+        inlateout("r8") a5.to_asm() => _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "sc",
+        "bns 0f",
+        "neg 3, 3",
+        "0:",
+        inlateout("r0") nr.to_asm() => _,
+        inlateout("r3") a0.to_asm() => r0,
+        inlateout("r4") a1.to_asm() => _,
+        inlateout("r5") a2.to_asm() => _,
+        inlateout("r6") a3.to_asm() => _,
+        inlateout("r7") a4.to_asm() => _,
+        inlateout("r8") a5.to_asm() => _,
+        lateout("r9") _,
+        lateout("r10") _,
+        lateout("r11") _,
+        lateout("r12") _,
+        lateout("cr0") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/riscv64.rs b/vendor/rustix/src/backend/linux_raw/arch/riscv64.rs
new file mode 100644
index 0000000..7b8533d
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/riscv64.rs
@@ -0,0 +1,265 @@
+//! riscv64 Linux system calls.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        lateout("a0") r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        in("a0") a0.to_asm(),
+        options(nostack, noreturn)
+    );
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        in("a2") a2.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        in("a2") a2.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        in("a2") a2.to_asm(),
+        in("a3") a3.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        in("a2") a2.to_asm(),
+        in("a3") a3.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        in("a2") a2.to_asm(),
+        in("a3") a3.to_asm(),
+        in("a4") a4.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        in("a2") a2.to_asm(),
+        in("a3") a3.to_asm(),
+        in("a4") a4.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        in("a2") a2.to_asm(),
+        in("a3") a3.to_asm(),
+        in("a4") a4.to_asm(),
+        in("a5") a5.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "ecall",
+        in("a7") nr.to_asm(),
+        inlateout("a0") a0.to_asm() => r0,
+        in("a1") a1.to_asm(),
+        in("a2") a2.to_asm(),
+        in("a3") a3.to_asm(),
+        in("a4") a4.to_asm(),
+        in("a5") a5.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/thumb.rs b/vendor/rustix/src/backend/linux_raw/arch/thumb.rs
new file mode 100644
index 0000000..73f9c1c
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/thumb.rs
@@ -0,0 +1,322 @@
+//! arm Linux system calls, using thumb-mode.
+//!
+//! In thumb-mode, r7 is the frame pointer and is not permitted to be used in
+//! an inline asm operand, so we have to use a different register and copy it
+//! into r7 inside the inline asm.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        lateout("r0") r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "mov r7, {nr}",
+        "svc 0",
+        nr = in(reg) nr.to_asm(),
+        in("r0") a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        in("r4") a4.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        in("r4") a4.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        in("r4") a4.to_asm(),
+        in("r5") a5.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "mov {tmp}, r7",
+        "mov r7, {nr}",
+        "svc 0",
+        "mov r7, {tmp}",
+        nr = in(reg) nr.to_asm(),
+        tmp = out(reg) _,
+        inlateout("r0") a0.to_asm() => r0,
+        in("r1") a1.to_asm(),
+        in("r2") a2.to_asm(),
+        in("r3") a3.to_asm(),
+        in("r4") a4.to_asm(),
+        in("r5") a5.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/x86.rs b/vendor/rustix/src/backend/linux_raw/arch/x86.rs
new file mode 100644
index 0000000..e789181
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/x86.rs
@@ -0,0 +1,489 @@
+//! 32-bit x86 Linux system calls.
+//!
+//! There are two forms; `indirect_*` which take a callee, which allow calling
+//! through the vDSO when possible, and plain forms, which use the `int 0x80`
+//! instruction.
+//!
+//! Most `rustix` syscalls use the vsyscall mechanism rather than going using
+//! `int 0x80` sequences, as vsyscall is much faster.
+//!
+//! Syscalls made with `int 0x80` preserve the flags register, while syscalls
+//! made using vsyscall do not.
+
+#![allow(dead_code)]
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use crate::backend::vdso_wrappers::SyscallType;
+use core::arch::asm;
+
+#[inline]
+pub(in crate::backend) unsafe fn indirect_syscall0(
+    callee: SyscallType,
+    nr: SyscallNumber<'_>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "call {callee}",
+        callee = in(reg) callee,
+        inlateout("eax") nr.to_asm() => r0,
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn indirect_syscall1(
+    callee: SyscallType,
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "call {callee}",
+        callee = in(reg) callee,
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn indirect_syscall1_noreturn(
+    callee: SyscallType,
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> ! {
+    asm!(
+        "call {callee}",
+        callee = in(reg) callee,
+        in("eax") nr.to_asm(),
+        in("ebx") a0.to_asm(),
+        options(noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn indirect_syscall2(
+    callee: SyscallType,
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "call {callee}",
+        callee = in(reg) callee,
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn indirect_syscall3(
+    callee: SyscallType,
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "call {callee}",
+        callee = in(reg) callee,
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn indirect_syscall4(
+    callee: SyscallType,
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    // a3 should go in esi, but `asm!` won't let us use it as an operand.
+    // Temporarily swap it into place, and then swap it back afterward.
+    //
+    // We hard-code the callee operand to use edi instead of `in(reg)` because
+    // even though we can't name esi as an operand, the compiler can use esi to
+    // satisfy `in(reg)`.
+    asm!(
+        "xchg esi, {a3}",
+        "call edi",
+        "xchg esi, {a3}",
+        a3 = in(reg) a3.to_asm(),
+        in("edi") callee,
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn indirect_syscall5(
+    callee: SyscallType,
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    // Oof. a3 should go in esi, and `asm!` won't let us use that register as
+    // an operand. And we can't request stack slots. And there are no other
+    // registers free. Use eax as a temporary pointer to a slice, since it gets
+    // clobbered as the return value anyway.
+    asm!(
+        "push esi",
+        "push [eax + 0]",
+        "mov esi, [eax + 4]",
+        "mov eax, [eax + 8]",
+        "call [esp]",
+        "pop esi",
+        "pop esi",
+        inout("eax") &[callee as _, a3.to_asm(), nr.to_asm()] => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        in("edi") a4.to_asm(),
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn indirect_syscall6(
+    callee: SyscallType,
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    // Oof again. a3 should go in esi, and a5 should go in ebp, and `asm!`
+    // won't let us use either of those registers as operands. And we can't
+    // request stack slots. And there are no other registers free. Use eax as a
+    // temporary pointer to a slice, since it gets clobbered as the return
+    // value anyway.
+    //
+    // This is another reason that syscalls should be compiler intrinsics
+    // rather than inline asm.
+    asm!(
+        "push ebp",
+        "push esi",
+        "push [eax + 0]",
+        "mov esi, [eax + 4]",
+        "mov ebp, [eax + 8]",
+        "mov eax, [eax + 12]",
+        "call [esp]",
+        "pop esi",
+        "pop esi",
+        "pop ebp",
+        inout("eax") &[callee as _, a3.to_asm(), a5.to_asm(), nr.to_asm()] => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        in("edi") a4.to_asm(),
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "int $$0x80",
+        inlateout("eax") nr.to_asm() => r0,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "int $$0x80",
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "int $$0x80",
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "int $$0x80",
+        in("eax") nr.to_asm(),
+        in("ebx") a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "int $$0x80",
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "int $$0x80",
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "int $$0x80",
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "int $$0x80",
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    // a3 should go in esi, but `asm!` won't let us use it as an operand.
+    // Temporarily swap it into place, and then swap it back afterward.
+    asm!(
+        "xchg esi, {a3}",
+        "int $$0x80",
+        "xchg esi, {a3}",
+        a3 = in(reg) a3.to_asm(),
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "xchg esi, {a3}",
+        "int $$0x80",
+        "xchg esi, {a3}",
+        a3 = in(reg) a3.to_asm(),
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    // As in `syscall4`, use xchg to handle a3. a4 should go in edi, and we can
+    // use that register as an operand. Unlike in `indirect_syscall5`, we don't
+    // have a `callee` operand taking up a register, so we have enough
+    // registers and don't need to use a slice.
+    asm!(
+        "xchg esi, {a3}",
+        "int $$0x80",
+        "xchg esi, {a3}",
+        a3 = in(reg) a3.to_asm(),
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        in("edi") a4.to_asm(),
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    // See the comments in `syscall5`.
+    asm!(
+        "xchg esi, {a3}",
+        "int $$0x80",
+        "xchg esi, {a3}",
+        a3 = in(reg) a3.to_asm(),
+        inlateout("eax") nr.to_asm() => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        in("edi") a4.to_asm(),
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    // See the comments in `indirect_syscall6`.
+    asm!(
+        "push ebp",
+        "push esi",
+        "mov esi, [eax + 0]",
+        "mov ebp, [eax + 4]",
+        "mov eax, [eax + 8]",
+        "int $$0x80",
+        "pop esi",
+        "pop ebp",
+        inout("eax") &[a3.to_asm(), a5.to_asm(), nr.to_asm()] => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        in("edi") a4.to_asm(),
+        options(preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    // See the comments in `indirect_syscall6`.
+    asm!(
+        "push ebp",
+        "push esi",
+        "mov esi, [eax + 0]",
+        "mov ebp, [eax + 4]",
+        "mov eax, [eax + 8]",
+        "int $$0x80",
+        "pop esi",
+        "pop ebp",
+        inout("eax") &[a3.to_asm(), a5.to_asm(), nr.to_asm()] => r0,
+        in("ebx") a0.to_asm(),
+        in("ecx") a1.to_asm(),
+        in("edx") a2.to_asm(),
+        in("edi") a4.to_asm(),
+        options(preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/arch/x86_64.rs b/vendor/rustix/src/backend/linux_raw/arch/x86_64.rs
new file mode 100644
index 0000000..62f35d9
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/arch/x86_64.rs
@@ -0,0 +1,293 @@
+//! x86-64 Linux system calls.
+
+use crate::backend::reg::{
+    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
+};
+use core::arch::asm;
+
+#[cfg(target_pointer_width = "32")]
+compile_error!("x32 is not yet supported");
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
+    asm!(
+        "syscall",
+        in("rax") nr.to_asm(),
+        in("rdi") a0.to_asm(),
+        options(nostack, noreturn)
+    )
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall2_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        in("rdx") a2.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall3_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        in("rdx") a2.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        in("rdx") a2.to_asm(),
+        in("r10") a3.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall4_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        in("rdx") a2.to_asm(),
+        in("r10") a3.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        in("rdx") a2.to_asm(),
+        in("r10") a3.to_asm(),
+        in("r8") a4.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall5_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        in("rdx") a2.to_asm(),
+        in("r10") a3.to_asm(),
+        in("r8") a4.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        in("rdx") a2.to_asm(),
+        in("r10") a3.to_asm(),
+        in("r8") a4.to_asm(),
+        in("r9") a5.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags)
+    );
+    FromAsm::from_asm(r0)
+}
+
+#[inline]
+pub(in crate::backend) unsafe fn syscall6_readonly(
+    nr: SyscallNumber<'_>,
+    a0: ArgReg<'_, A0>,
+    a1: ArgReg<'_, A1>,
+    a2: ArgReg<'_, A2>,
+    a3: ArgReg<'_, A3>,
+    a4: ArgReg<'_, A4>,
+    a5: ArgReg<'_, A5>,
+) -> RetReg<R0> {
+    let r0;
+    asm!(
+        "syscall",
+        inlateout("rax") nr.to_asm() => r0,
+        in("rdi") a0.to_asm(),
+        in("rsi") a1.to_asm(),
+        in("rdx") a2.to_asm(),
+        in("r10") a3.to_asm(),
+        in("r8") a4.to_asm(),
+        in("r9") a5.to_asm(),
+        lateout("rcx") _,
+        lateout("r11") _,
+        options(nostack, preserves_flags, readonly)
+    );
+    FromAsm::from_asm(r0)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/c.rs b/vendor/rustix/src/backend/linux_raw/c.rs
new file mode 100644
index 0000000..edc9eb8
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/c.rs
@@ -0,0 +1,304 @@
+//! Adapt the Linux API to resemble a POSIX-style libc API.
+//!
+//! The linux_raw backend doesn't use actual libc; this just defines certain
+//! types that are convenient to have defined.
+
+#![allow(unused_imports)]
+#![allow(non_camel_case_types)]
+
+pub(crate) type size_t = usize;
+pub(crate) use linux_raw_sys::ctypes::*;
+pub(crate) use linux_raw_sys::errno::EINVAL;
+pub(crate) use linux_raw_sys::ioctl::{FIONBIO, FIONREAD};
+// Import the kernel's `uid_t` and `gid_t` if they're 32-bit.
+#[cfg(not(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86")))]
+pub(crate) use linux_raw_sys::general::{__kernel_gid_t as gid_t, __kernel_uid_t as uid_t};
+pub(crate) use linux_raw_sys::general::{
+    __kernel_pid_t as pid_t, __kernel_time64_t as time_t, __kernel_timespec as timespec, iovec,
+    O_CLOEXEC, O_NOCTTY, O_NONBLOCK, O_RDWR,
+};
+
+#[cfg(feature = "event")]
+#[cfg(test)]
+pub(crate) use linux_raw_sys::general::epoll_event;
+
+#[cfg(any(
+    feature = "fs",
+    all(
+        not(feature = "use-libc-auxv"),
+        not(feature = "use-explicitly-provided-auxv"),
+        any(
+            feature = "param",
+            feature = "process",
+            feature = "runtime",
+            feature = "time",
+            target_arch = "x86",
+        )
+    )
+))]
+pub(crate) use linux_raw_sys::general::{
+    AT_FDCWD, NFS_SUPER_MAGIC, O_LARGEFILE, PROC_SUPER_MAGIC, UTIME_NOW, UTIME_OMIT, XATTR_CREATE,
+    XATTR_REPLACE,
+};
+
+pub(crate) use linux_raw_sys::ioctl::{BLKPBSZGET, BLKSSZGET, FICLONE};
+
+#[cfg(feature = "io_uring")]
+pub(crate) use linux_raw_sys::{general::open_how, io_uring::*};
+
+#[cfg(feature = "net")]
+pub(crate) use linux_raw_sys::{
+    cmsg_macros::*,
+    general::{O_CLOEXEC as SOCK_CLOEXEC, O_NONBLOCK as SOCK_NONBLOCK},
+    if_ether::*,
+    net::{
+        linger, msghdr, sockaddr, sockaddr_in, sockaddr_in6, sockaddr_un, socklen_t, AF_DECnet,
+        __kernel_sa_family_t as sa_family_t, __kernel_sockaddr_storage as sockaddr_storage,
+        cmsghdr, in6_addr, in_addr, ip_mreq, ip_mreq_source, ip_mreqn, ipv6_mreq, AF_APPLETALK,
+        AF_ASH, AF_ATMPVC, AF_ATMSVC, AF_AX25, AF_BLUETOOTH, AF_BRIDGE, AF_CAN, AF_ECONET,
+        AF_IEEE802154, AF_INET, AF_INET6, AF_IPX, AF_IRDA, AF_ISDN, AF_IUCV, AF_KEY, AF_LLC,
+        AF_NETBEUI, AF_NETLINK, AF_NETROM, AF_PACKET, AF_PHONET, AF_PPPOX, AF_RDS, AF_ROSE,
+        AF_RXRPC, AF_SECURITY, AF_SNA, AF_TIPC, AF_UNIX, AF_UNSPEC, AF_WANPIPE, AF_X25,
+        IP6T_SO_ORIGINAL_DST, IPPROTO_FRAGMENT, IPPROTO_ICMPV6, IPPROTO_MH, IPPROTO_ROUTING,
+        IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_FREEBIND, IPV6_MULTICAST_HOPS,
+        IPV6_MULTICAST_LOOP, IPV6_RECVTCLASS, IPV6_TCLASS, IPV6_UNICAST_HOPS, IPV6_V6ONLY,
+        IP_ADD_MEMBERSHIP, IP_ADD_SOURCE_MEMBERSHIP, IP_DROP_MEMBERSHIP, IP_DROP_SOURCE_MEMBERSHIP,
+        IP_FREEBIND, IP_MULTICAST_LOOP, IP_MULTICAST_TTL, IP_RECVTOS, IP_TOS, IP_TTL,
+        MSG_CMSG_CLOEXEC, MSG_CONFIRM, MSG_DONTROUTE, MSG_DONTWAIT, MSG_EOR, MSG_ERRQUEUE,
+        MSG_MORE, MSG_NOSIGNAL, MSG_OOB, MSG_PEEK, MSG_TRUNC, MSG_WAITALL, SCM_CREDENTIALS,
+        SCM_RIGHTS, SHUT_RD, SHUT_RDWR, SHUT_WR, SOCK_DGRAM, SOCK_RAW, SOCK_RDM, SOCK_SEQPACKET,
+        SOCK_STREAM, SOL_SOCKET, SO_ACCEPTCONN, SO_BROADCAST, SO_COOKIE, SO_DOMAIN, SO_ERROR,
+        SO_INCOMING_CPU, SO_KEEPALIVE, SO_LINGER, SO_OOBINLINE, SO_ORIGINAL_DST, SO_PASSCRED,
+        SO_PROTOCOL, SO_RCVBUF, SO_RCVTIMEO_NEW, SO_RCVTIMEO_NEW as SO_RCVTIMEO, SO_RCVTIMEO_OLD,
+        SO_REUSEADDR, SO_REUSEPORT, SO_SNDBUF, SO_SNDTIMEO_NEW, SO_SNDTIMEO_NEW as SO_SNDTIMEO,
+        SO_SNDTIMEO_OLD, SO_TYPE, TCP_CONGESTION, TCP_CORK, TCP_KEEPCNT, TCP_KEEPIDLE,
+        TCP_KEEPINTVL, TCP_NODELAY, TCP_QUICKACK, TCP_THIN_LINEAR_TIMEOUTS, TCP_USER_TIMEOUT,
+    },
+    netlink::*,
+};
+
+// Cast away bindgen's `enum` type to make these consistent with the other
+// `setsockopt`/`getsockopt` level values.
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_IP: u32 = linux_raw_sys::net::IPPROTO_IP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_ICMP: u32 = linux_raw_sys::net::IPPROTO_ICMP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_IGMP: u32 = linux_raw_sys::net::IPPROTO_IGMP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_IPIP: u32 = linux_raw_sys::net::IPPROTO_IPIP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_TCP: u32 = linux_raw_sys::net::IPPROTO_TCP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_EGP: u32 = linux_raw_sys::net::IPPROTO_EGP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_PUP: u32 = linux_raw_sys::net::IPPROTO_PUP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_UDP: u32 = linux_raw_sys::net::IPPROTO_UDP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_IDP: u32 = linux_raw_sys::net::IPPROTO_IDP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_TP: u32 = linux_raw_sys::net::IPPROTO_TP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_DCCP: u32 = linux_raw_sys::net::IPPROTO_DCCP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_IPV6: u32 = linux_raw_sys::net::IPPROTO_IPV6 as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_RSVP: u32 = linux_raw_sys::net::IPPROTO_RSVP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_GRE: u32 = linux_raw_sys::net::IPPROTO_GRE as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_ESP: u32 = linux_raw_sys::net::IPPROTO_ESP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_AH: u32 = linux_raw_sys::net::IPPROTO_AH as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_MTP: u32 = linux_raw_sys::net::IPPROTO_MTP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_BEETPH: u32 = linux_raw_sys::net::IPPROTO_BEETPH as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_ENCAP: u32 = linux_raw_sys::net::IPPROTO_ENCAP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_PIM: u32 = linux_raw_sys::net::IPPROTO_PIM as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_COMP: u32 = linux_raw_sys::net::IPPROTO_COMP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_SCTP: u32 = linux_raw_sys::net::IPPROTO_SCTP as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_UDPLITE: u32 = linux_raw_sys::net::IPPROTO_UDPLITE as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_MPLS: u32 = linux_raw_sys::net::IPPROTO_MPLS as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_ETHERNET: u32 = linux_raw_sys::net::IPPROTO_ETHERNET as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_RAW: u32 = linux_raw_sys::net::IPPROTO_RAW as _;
+#[cfg(feature = "net")]
+pub(crate) const IPPROTO_MPTCP: u32 = linux_raw_sys::net::IPPROTO_MPTCP as _;
+
+#[cfg(any(feature = "process", feature = "runtime"))]
+pub(crate) use linux_raw_sys::general::siginfo_t;
+
+#[cfg(any(feature = "process", feature = "runtime"))]
+pub(crate) const EXIT_SUCCESS: c_int = 0;
+#[cfg(any(feature = "process", feature = "runtime"))]
+pub(crate) const EXIT_FAILURE: c_int = 1;
+#[cfg(feature = "process")]
+pub(crate) const EXIT_SIGNALED_SIGABRT: c_int = 128 + linux_raw_sys::general::SIGABRT as c_int;
+#[cfg(feature = "runtime")]
+pub(crate) const CLONE_CHILD_SETTID: c_int = linux_raw_sys::general::CLONE_CHILD_SETTID as c_int;
+
+#[cfg(feature = "process")]
+pub(crate) use linux_raw_sys::{
+    general::{
+        CLD_CONTINUED, CLD_DUMPED, CLD_EXITED, CLD_KILLED, CLD_STOPPED, CLD_TRAPPED,
+        O_NONBLOCK as PIDFD_NONBLOCK, P_ALL, P_PGID, P_PID, P_PIDFD,
+    },
+    ioctl::TIOCSCTTY,
+};
+
+#[cfg(feature = "pty")]
+pub(crate) use linux_raw_sys::ioctl::TIOCGPTPEER;
+
+#[cfg(feature = "termios")]
+pub(crate) use linux_raw_sys::{
+    general::{
+        cc_t, speed_t, tcflag_t, termios, termios2, winsize, B0, B1000000, B110, B115200, B1152000,
+        B1200, B134, B150, B1500000, B1800, B19200, B200, B2000000, B230400, B2400, B2500000, B300,
+        B3000000, B3500000, B38400, B4000000, B460800, B4800, B50, B500000, B57600, B576000, B600,
+        B75, B921600, B9600, BOTHER, BRKINT, BS0, BS1, BSDLY, CBAUD, CBAUDEX, CIBAUD, CLOCAL,
+        CMSPAR, CR0, CR1, CR2, CR3, CRDLY, CREAD, CRTSCTS, CS5, CS6, CS7, CS8, CSIZE, CSTOPB, ECHO,
+        ECHOCTL, ECHOE, ECHOK, ECHOKE, ECHONL, ECHOPRT, EXTA, EXTB, EXTPROC, FF0, FF1, FFDLY,
+        FLUSHO, HUPCL, IBSHIFT, ICANON, ICRNL, IEXTEN, IGNBRK, IGNCR, IGNPAR, IMAXBEL, INLCR,
+        INPCK, ISIG, ISTRIP, IUCLC, IUTF8, IXANY, IXOFF, IXON, NCCS, NL0, NL1, NLDLY, NOFLSH,
+        OCRNL, OFDEL, OFILL, OLCUC, ONLCR, ONLRET, ONOCR, OPOST, PARENB, PARMRK, PARODD, PENDIN,
+        TAB0, TAB1, TAB2, TAB3, TABDLY, TCIFLUSH, TCIOFF, TCIOFLUSH, TCION, TCOFLUSH, TCOOFF,
+        TCOON, TCSADRAIN, TCSAFLUSH, TCSANOW, TOSTOP, VDISCARD, VEOF, VEOL, VEOL2, VERASE, VINTR,
+        VKILL, VLNEXT, VMIN, VQUIT, VREPRINT, VSTART, VSTOP, VSUSP, VSWTC, VT0, VT1, VTDLY, VTIME,
+        VWERASE, XCASE, XTABS,
+    },
+    ioctl::{TCGETS2, TCSETS2, TCSETSF2, TCSETSW2, TIOCEXCL, TIOCNXCL},
+};
+
+// On MIPS, `TCSANOW` et al have `TCSETS` added to them, so we need it to
+// subtract it out.
+#[cfg(all(
+    feature = "termios",
+    any(
+        target_arch = "mips",
+        target_arch = "mips32r6",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    )
+))]
+pub(crate) use linux_raw_sys::ioctl::TCSETS;
+
+// Define our own `uid_t` and `gid_t` if the kernel's versions are not 32-bit.
+#[cfg(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86"))]
+pub(crate) type uid_t = u32;
+#[cfg(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86"))]
+pub(crate) type gid_t = u32;
+
+// Bindgen infers `u32` for many of these macro types which meant to be
+// used with `c_int` in the C APIs, so cast them to `c_int`.
+
+// Convert the signal constants from `u32` to `c_int`.
+pub(crate) const SIGHUP: c_int = linux_raw_sys::general::SIGHUP as _;
+pub(crate) const SIGINT: c_int = linux_raw_sys::general::SIGINT as _;
+pub(crate) const SIGQUIT: c_int = linux_raw_sys::general::SIGQUIT as _;
+pub(crate) const SIGILL: c_int = linux_raw_sys::general::SIGILL as _;
+pub(crate) const SIGTRAP: c_int = linux_raw_sys::general::SIGTRAP as _;
+pub(crate) const SIGABRT: c_int = linux_raw_sys::general::SIGABRT as _;
+pub(crate) const SIGBUS: c_int = linux_raw_sys::general::SIGBUS as _;
+pub(crate) const SIGFPE: c_int = linux_raw_sys::general::SIGFPE as _;
+pub(crate) const SIGKILL: c_int = linux_raw_sys::general::SIGKILL as _;
+pub(crate) const SIGUSR1: c_int = linux_raw_sys::general::SIGUSR1 as _;
+pub(crate) const SIGSEGV: c_int = linux_raw_sys::general::SIGSEGV as _;
+pub(crate) const SIGUSR2: c_int = linux_raw_sys::general::SIGUSR2 as _;
+pub(crate) const SIGPIPE: c_int = linux_raw_sys::general::SIGPIPE as _;
+pub(crate) const SIGALRM: c_int = linux_raw_sys::general::SIGALRM as _;
+pub(crate) const SIGTERM: c_int = linux_raw_sys::general::SIGTERM as _;
+#[cfg(not(any(
+    target_arch = "mips",
+    target_arch = "mips32r6",
+    target_arch = "mips64",
+    target_arch = "mips64r6",
+    target_arch = "sparc",
+    target_arch = "sparc64"
+)))]
+pub(crate) const SIGSTKFLT: c_int = linux_raw_sys::general::SIGSTKFLT as _;
+pub(crate) const SIGCHLD: c_int = linux_raw_sys::general::SIGCHLD as _;
+pub(crate) const SIGCONT: c_int = linux_raw_sys::general::SIGCONT as _;
+pub(crate) const SIGSTOP: c_int = linux_raw_sys::general::SIGSTOP as _;
+pub(crate) const SIGTSTP: c_int = linux_raw_sys::general::SIGTSTP as _;
+pub(crate) const SIGTTIN: c_int = linux_raw_sys::general::SIGTTIN as _;
+pub(crate) const SIGTTOU: c_int = linux_raw_sys::general::SIGTTOU as _;
+pub(crate) const SIGURG: c_int = linux_raw_sys::general::SIGURG as _;
+pub(crate) const SIGXCPU: c_int = linux_raw_sys::general::SIGXCPU as _;
+pub(crate) const SIGXFSZ: c_int = linux_raw_sys::general::SIGXFSZ as _;
+pub(crate) const SIGVTALRM: c_int = linux_raw_sys::general::SIGVTALRM as _;
+pub(crate) const SIGPROF: c_int = linux_raw_sys::general::SIGPROF as _;
+pub(crate) const SIGWINCH: c_int = linux_raw_sys::general::SIGWINCH as _;
+pub(crate) const SIGIO: c_int = linux_raw_sys::general::SIGIO as _;
+pub(crate) const SIGPWR: c_int = linux_raw_sys::general::SIGPWR as _;
+pub(crate) const SIGSYS: c_int = linux_raw_sys::general::SIGSYS as _;
+#[cfg(any(
+    target_arch = "mips",
+    target_arch = "mips32r6",
+    target_arch = "mips64",
+    target_arch = "mips64r6",
+    target_arch = "sparc",
+    target_arch = "sparc64"
+))]
+pub(crate) const SIGEMT: c_int = linux_raw_sys::general::SIGEMT as _;
+
+#[cfg(feature = "stdio")]
+pub(crate) const STDIN_FILENO: c_int = linux_raw_sys::general::STDIN_FILENO as _;
+#[cfg(feature = "stdio")]
+pub(crate) const STDOUT_FILENO: c_int = linux_raw_sys::general::STDOUT_FILENO as _;
+#[cfg(feature = "stdio")]
+pub(crate) const STDERR_FILENO: c_int = linux_raw_sys::general::STDERR_FILENO as _;
+
+pub(crate) const PIPE_BUF: usize = linux_raw_sys::general::PIPE_BUF as _;
+
+pub(crate) const CLOCK_MONOTONIC: c_int = linux_raw_sys::general::CLOCK_MONOTONIC as _;
+pub(crate) const CLOCK_REALTIME: c_int = linux_raw_sys::general::CLOCK_REALTIME as _;
+pub(crate) const CLOCK_MONOTONIC_RAW: c_int = linux_raw_sys::general::CLOCK_MONOTONIC_RAW as _;
+pub(crate) const CLOCK_MONOTONIC_COARSE: c_int =
+    linux_raw_sys::general::CLOCK_MONOTONIC_COARSE as _;
+pub(crate) const CLOCK_REALTIME_COARSE: c_int = linux_raw_sys::general::CLOCK_REALTIME_COARSE as _;
+pub(crate) const CLOCK_THREAD_CPUTIME_ID: c_int =
+    linux_raw_sys::general::CLOCK_THREAD_CPUTIME_ID as _;
+pub(crate) const CLOCK_PROCESS_CPUTIME_ID: c_int =
+    linux_raw_sys::general::CLOCK_PROCESS_CPUTIME_ID as _;
+#[cfg(any(feature = "thread", feature = "time", target_arch = "x86"))]
+pub(crate) const CLOCK_BOOTTIME: c_int = linux_raw_sys::general::CLOCK_BOOTTIME as _;
+#[cfg(any(feature = "thread", feature = "time", target_arch = "x86"))]
+pub(crate) const CLOCK_BOOTTIME_ALARM: c_int = linux_raw_sys::general::CLOCK_BOOTTIME_ALARM as _;
+#[cfg(any(feature = "thread", feature = "time", target_arch = "x86"))]
+pub(crate) const CLOCK_TAI: c_int = linux_raw_sys::general::CLOCK_TAI as _;
+#[cfg(any(feature = "thread", feature = "time", target_arch = "x86"))]
+pub(crate) const CLOCK_REALTIME_ALARM: c_int = linux_raw_sys::general::CLOCK_REALTIME_ALARM as _;
+
+#[cfg(feature = "system")]
+mod reboot_symbols {
+    use super::c_int;
+
+    pub(crate) const LINUX_REBOOT_MAGIC1: c_int = linux_raw_sys::general::LINUX_REBOOT_MAGIC1 as _;
+    pub(crate) const LINUX_REBOOT_MAGIC2: c_int = linux_raw_sys::general::LINUX_REBOOT_MAGIC2 as _;
+
+    pub(crate) const LINUX_REBOOT_CMD_RESTART: c_int =
+        linux_raw_sys::general::LINUX_REBOOT_CMD_RESTART as _;
+    pub(crate) const LINUX_REBOOT_CMD_HALT: c_int =
+        linux_raw_sys::general::LINUX_REBOOT_CMD_HALT as _;
+    pub(crate) const LINUX_REBOOT_CMD_CAD_ON: c_int =
+        linux_raw_sys::general::LINUX_REBOOT_CMD_CAD_ON as _;
+    pub(crate) const LINUX_REBOOT_CMD_CAD_OFF: c_int =
+        linux_raw_sys::general::LINUX_REBOOT_CMD_CAD_OFF as _;
+    pub(crate) const LINUX_REBOOT_CMD_POWER_OFF: c_int =
+        linux_raw_sys::general::LINUX_REBOOT_CMD_POWER_OFF as _;
+    pub(crate) const LINUX_REBOOT_CMD_SW_SUSPEND: c_int =
+        linux_raw_sys::general::LINUX_REBOOT_CMD_SW_SUSPEND as _;
+    pub(crate) const LINUX_REBOOT_CMD_KEXEC: c_int =
+        linux_raw_sys::general::LINUX_REBOOT_CMD_KEXEC as _;
+}
+#[cfg(feature = "system")]
+pub(crate) use reboot_symbols::*;
diff --git a/vendor/rustix/src/backend/linux_raw/conv.rs b/vendor/rustix/src/backend/linux_raw/conv.rs
new file mode 100644
index 0000000..f0de45a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/conv.rs
@@ -0,0 +1,1019 @@
+//! Convert values to [`ArgReg`] and from [`RetReg`].
+//!
+//! System call arguments and return values are all communicated with inline
+//! asm and FFI as `*mut Opaque`. To protect these raw pointers from escaping
+//! or being accidentally misused as they travel through the code, we wrap them
+//! in [`ArgReg`] and [`RetReg`] structs. This file provides `From`
+//! implementations and explicit conversion functions for converting values
+//! into and out of these wrapper structs.
+//!
+//! # Safety
+//!
+//! Some of this code is `unsafe` in order to work with raw file descriptors,
+//! and some is `unsafe` to interpret the values in a `RetReg`.
+#![allow(unsafe_code)]
+
+use super::c;
+use super::fd::{AsRawFd, BorrowedFd, FromRawFd, RawFd};
+#[cfg(any(feature = "event", feature = "runtime"))]
+use super::io::errno::try_decode_error;
+#[cfg(target_pointer_width = "64")]
+use super::io::errno::try_decode_u64;
+#[cfg(not(debug_assertions))]
+use super::io::errno::{
+    decode_c_int_infallible, decode_c_uint_infallible, decode_usize_infallible,
+};
+use super::io::errno::{
+    try_decode_c_int, try_decode_c_uint, try_decode_raw_fd, try_decode_usize, try_decode_void,
+    try_decode_void_star,
+};
+use super::reg::{raw_arg, ArgNumber, ArgReg, RetReg, R0};
+#[cfg(feature = "time")]
+use super::time::types::TimerfdClockId;
+#[cfg(any(feature = "thread", feature = "time", target_arch = "x86"))]
+use crate::clockid::ClockId;
+use crate::fd::OwnedFd;
+use crate::ffi::CStr;
+use crate::io;
+#[cfg(any(feature = "process", feature = "runtime", feature = "termios"))]
+use crate::pid::Pid;
+#[cfg(feature = "process")]
+use crate::process::Resource;
+#[cfg(any(feature = "process", feature = "runtime"))]
+use crate::signal::Signal;
+use crate::utils::{as_mut_ptr, as_ptr};
+use core::mem::MaybeUninit;
+use core::ptr::null_mut;
+#[cfg(any(feature = "thread", feature = "time", target_arch = "x86"))]
+use linux_raw_sys::general::__kernel_clockid_t;
+#[cfg(target_pointer_width = "64")]
+use linux_raw_sys::general::__kernel_loff_t;
+#[cfg(feature = "net")]
+use linux_raw_sys::net::socklen_t;
+
+/// Convert `SYS_*` constants for socketcall.
+#[cfg(target_arch = "x86")]
+#[inline]
+pub(super) fn x86_sys<'a, Num: ArgNumber>(sys: u32) -> ArgReg<'a, Num> {
+    pass_usize(sys as usize)
+}
+
+/// Pass the "low" half of the endian-specific memory encoding of a `u64`, for
+/// 32-bit architectures.
+#[cfg(target_pointer_width = "32")]
+#[inline]
+pub(super) fn lo<'a, Num: ArgNumber>(x: u64) -> ArgReg<'a, Num> {
+    #[cfg(target_endian = "little")]
+    let x = x >> 32;
+    #[cfg(target_endian = "big")]
+    let x = x & 0xffff_ffff;
+
+    pass_usize(x as usize)
+}
+
+/// Pass the "high" half of the endian-specific memory encoding of a `u64`, for
+/// 32-bit architectures.
+#[cfg(target_pointer_width = "32")]
+#[inline]
+pub(super) fn hi<'a, Num: ArgNumber>(x: u64) -> ArgReg<'a, Num> {
+    #[cfg(target_endian = "little")]
+    let x = x & 0xffff_ffff;
+    #[cfg(target_endian = "big")]
+    let x = x >> 32;
+
+    pass_usize(x as usize)
+}
+
+/// Pass a zero, or null, argument.
+#[inline]
+pub(super) fn zero<'a, Num: ArgNumber>() -> ArgReg<'a, Num> {
+    raw_arg(null_mut())
+}
+
+/// Pass the `mem::size_of` of a type.
+#[inline]
+pub(super) fn size_of<'a, T: Sized, Num: ArgNumber>() -> ArgReg<'a, Num> {
+    pass_usize(core::mem::size_of::<T>())
+}
+
+/// Pass an arbitrary `usize` value.
+///
+/// For passing pointers, use `void_star` or other functions which take a raw
+/// pointer instead of casting to `usize`, so that provenance is preserved.
+#[inline]
+pub(super) fn pass_usize<'a, Num: ArgNumber>(t: usize) -> ArgReg<'a, Num> {
+    raw_arg(t as *mut _)
+}
+
+impl<'a, Num: ArgNumber, T> From<*mut T> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(c: *mut T) -> ArgReg<'a, Num> {
+        raw_arg(c.cast())
+    }
+}
+
+impl<'a, Num: ArgNumber, T> From<*const T> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(c: *const T) -> ArgReg<'a, Num> {
+        let mut_ptr = c as *mut T;
+        raw_arg(mut_ptr.cast())
+    }
+}
+
+impl<'a, Num: ArgNumber> From<&'a CStr> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(c: &'a CStr) -> Self {
+        let mut_ptr = c.as_ptr() as *mut u8;
+        raw_arg(mut_ptr.cast())
+    }
+}
+
+impl<'a, Num: ArgNumber> From<Option<&'a CStr>> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(t: Option<&'a CStr>) -> Self {
+        raw_arg(match t {
+            Some(s) => {
+                let mut_ptr = s.as_ptr() as *mut u8;
+                mut_ptr.cast()
+            }
+            None => null_mut(),
+        })
+    }
+}
+
+/// Pass a borrowed file-descriptor argument.
+impl<'a, Num: ArgNumber> From<BorrowedFd<'a>> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(fd: BorrowedFd<'a>) -> Self {
+        // SAFETY: `BorrowedFd` ensures that the file descriptor is valid, and
+        // the lifetime parameter on the resulting `ArgReg` ensures that the
+        // result is bounded by the `BorrowedFd`'s lifetime.
+        unsafe { raw_fd(fd.as_raw_fd()) }
+    }
+}
+
+/// Pass a raw file-descriptor argument. Most users should use [`ArgReg::from`]
+/// instead, to preserve I/O safety as long as possible.
+///
+/// # Safety
+///
+/// `fd` must be a valid open file descriptor.
+#[inline]
+pub(super) unsafe fn raw_fd<'a, Num: ArgNumber>(fd: RawFd) -> ArgReg<'a, Num> {
+    // Use `no_fd` when passing `-1` is intended.
+    #[cfg(feature = "fs")]
+    debug_assert!(fd == crate::fs::CWD.as_raw_fd() || fd >= 0);
+
+    // Don't pass the `io_uring_register_files_skip` sentry value this way.
+    #[cfg(feature = "io_uring")]
+    debug_assert_ne!(
+        fd,
+        crate::io_uring::io_uring_register_files_skip().as_raw_fd()
+    );
+
+    // Linux doesn't look at the high bits beyond the `c_int`, so use
+    // zero-extension rather than sign-extension because it's a smaller
+    // instruction.
+    let fd: c::c_int = fd;
+    pass_usize(fd as c::c_uint as usize)
+}
+
+/// Deliberately pass `-1` to a file-descriptor argument, for system calls
+/// like `mmap` where this indicates the argument is omitted.
+#[inline]
+pub(super) fn no_fd<'a, Num: ArgNumber>() -> ArgReg<'a, Num> {
+    pass_usize(!0_usize)
+}
+
+#[inline]
+pub(super) fn slice_just_addr<T: Sized, Num: ArgNumber>(v: &[T]) -> ArgReg<'_, Num> {
+    let mut_ptr = v.as_ptr() as *mut T;
+    raw_arg(mut_ptr.cast())
+}
+
+#[inline]
+pub(super) fn slice_just_addr_mut<T: Sized, Num: ArgNumber>(v: &mut [T]) -> ArgReg<'_, Num> {
+    raw_arg(v.as_mut_ptr().cast())
+}
+
+#[inline]
+pub(super) fn slice<T: Sized, Num0: ArgNumber, Num1: ArgNumber>(
+    v: &[T],
+) -> (ArgReg<'_, Num0>, ArgReg<'_, Num1>) {
+    (slice_just_addr(v), pass_usize(v.len()))
+}
+
+#[inline]
+pub(super) fn slice_mut<T: Sized, Num0: ArgNumber, Num1: ArgNumber>(
+    v: &mut [T],
+) -> (ArgReg<'_, Num0>, ArgReg<'_, Num1>) {
+    (raw_arg(v.as_mut_ptr().cast()), pass_usize(v.len()))
+}
+
+#[inline]
+pub(super) fn by_ref<T: Sized, Num: ArgNumber>(t: &T) -> ArgReg<'_, Num> {
+    let mut_ptr = as_ptr(t) as *mut T;
+    raw_arg(mut_ptr.cast())
+}
+
+#[inline]
+pub(super) fn by_mut<T: Sized, Num: ArgNumber>(t: &mut T) -> ArgReg<'_, Num> {
+    raw_arg(as_mut_ptr(t).cast())
+}
+
+/// Convert an optional mutable reference into a `usize` for passing to a
+/// syscall.
+#[inline]
+pub(super) fn opt_mut<T: Sized, Num: ArgNumber>(t: Option<&mut T>) -> ArgReg<'_, Num> {
+    // This optimizes into the equivalent of `transmute(t)`, and has the
+    // advantage of not requiring `unsafe`.
+    match t {
+        Some(t) => by_mut(t),
+        None => raw_arg(null_mut()),
+    }
+}
+
+/// Convert an optional immutable reference into a `usize` for passing to a
+/// syscall.
+#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+#[inline]
+pub(super) fn opt_ref<T: Sized, Num: ArgNumber>(t: Option<&T>) -> ArgReg<'_, Num> {
+    // This optimizes into the equivalent of `transmute(t)`, and has the
+    // advantage of not requiring `unsafe`.
+    match t {
+        Some(t) => by_ref(t),
+        None => raw_arg(null_mut()),
+    }
+}
+
+/// Convert a `c_int` into an `ArgReg`.
+///
+/// Be sure to use `raw_fd` to pass `RawFd` values.
+#[inline]
+pub(super) fn c_int<'a, Num: ArgNumber>(i: c::c_int) -> ArgReg<'a, Num> {
+    pass_usize(i as usize)
+}
+
+/// Convert a `c_uint` into an `ArgReg`.
+#[inline]
+pub(super) fn c_uint<'a, Num: ArgNumber>(i: c::c_uint) -> ArgReg<'a, Num> {
+    pass_usize(i as usize)
+}
+
+#[cfg(target_pointer_width = "64")]
+#[inline]
+pub(super) fn loff_t<'a, Num: ArgNumber>(i: __kernel_loff_t) -> ArgReg<'a, Num> {
+    pass_usize(i as usize)
+}
+
+#[cfg(target_pointer_width = "64")]
+#[inline]
+pub(super) fn loff_t_from_u64<'a, Num: ArgNumber>(i: u64) -> ArgReg<'a, Num> {
+    // `loff_t` is signed, but syscalls which expect `loff_t` return `EINVAL`
+    // if it's outside the signed `i64` range, so we can silently cast.
+    pass_usize(i as usize)
+}
+
+#[cfg(any(feature = "thread", feature = "time", target_arch = "x86"))]
+impl<'a, Num: ArgNumber> From<ClockId> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(i: ClockId) -> Self {
+        pass_usize(i as __kernel_clockid_t as usize)
+    }
+}
+
+#[cfg(feature = "time")]
+impl<'a, Num: ArgNumber> From<TimerfdClockId> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(i: TimerfdClockId) -> Self {
+        pass_usize(i as __kernel_clockid_t as usize)
+    }
+}
+
+#[cfg(feature = "net")]
+#[inline]
+pub(super) fn socklen_t<'a, Num: ArgNumber>(i: socklen_t) -> ArgReg<'a, Num> {
+    pass_usize(i as usize)
+}
+
+#[cfg(any(
+    feature = "fs",
+    all(
+        not(feature = "use-libc-auxv"),
+        not(feature = "use-explicitly-provided-auxv"),
+        any(
+            feature = "param",
+            feature = "process",
+            feature = "runtime",
+            feature = "time",
+            target_arch = "x86",
+        )
+    )
+))]
+pub(crate) mod fs {
+    use super::*;
+    use crate::fs::{FileType, Mode, OFlags};
+    #[cfg(target_pointer_width = "32")]
+    use linux_raw_sys::general::O_LARGEFILE;
+
+    impl<'a, Num: ArgNumber> From<Mode> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(mode: Mode) -> Self {
+            pass_usize(mode.bits() as usize)
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<(Mode, FileType)> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(pair: (Mode, FileType)) -> Self {
+            pass_usize(pair.0.as_raw_mode() as usize | pair.1.as_raw_mode() as usize)
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::AtFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::AtFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::XattrFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::XattrFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::inotify::CreateFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::inotify::CreateFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::inotify::WatchFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::inotify::WatchFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::MemfdFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::MemfdFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::RenameFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::RenameFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::StatxFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::StatxFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    #[inline]
+    fn oflags_bits(oflags: OFlags) -> c::c_uint {
+        let mut bits = oflags.bits();
+        // Add `O_LARGEFILE`, unless `O_PATH` is set, as Linux returns `EINVAL`
+        // when both are set.
+        if !oflags.contains(OFlags::PATH) {
+            bits |= O_LARGEFILE;
+        }
+        bits
+    }
+
+    #[cfg(target_pointer_width = "64")]
+    #[inline]
+    const fn oflags_bits(oflags: OFlags) -> c::c_uint {
+        oflags.bits()
+    }
+
+    impl<'a, Num: ArgNumber> From<OFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(oflags: OFlags) -> Self {
+            pass_usize(oflags_bits(oflags) as usize)
+        }
+    }
+
+    /// Convert an `OFlags` into a `u64` for use in the `open_how` struct.
+    #[inline]
+    pub(crate) fn oflags_for_open_how(oflags: OFlags) -> u64 {
+        u64::from(oflags_bits(oflags))
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::FallocateFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::FallocateFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::Advice> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(advice: crate::fs::Advice) -> Self {
+            c_uint(advice as c::c_uint)
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::SealFlags> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(flags: crate::fs::SealFlags) -> Self {
+            c_uint(flags.bits())
+        }
+    }
+
+    impl<'a, Num: ArgNumber> From<crate::fs::Access> for ArgReg<'a, Num> {
+        #[inline]
+        fn from(access: crate::fs::Access) -> Self {
+            c_uint(access.bits())
+        }
+    }
+}
+
+#[cfg(any(feature = "fs", feature = "mount"))]
+impl<'a, Num: ArgNumber> From<crate::backend::mount::types::MountFlagsArg> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mount::types::MountFlagsArg) -> Self {
+        c_uint(flags.0)
+    }
+}
+
+// When the deprecated "fs" aliases are removed, we can remove the "fs"
+// here too.
+#[cfg(any(feature = "fs", feature = "mount"))]
+impl<'a, Num: ArgNumber> From<crate::backend::mount::types::UnmountFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mount::types::UnmountFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mount")]
+impl<'a, Num: ArgNumber> From<crate::mount::FsConfigCmd> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(cmd: crate::mount::FsConfigCmd) -> Self {
+        c_uint(cmd as c::c_uint)
+    }
+}
+
+#[cfg(feature = "mount")]
+impl<'a, Num: ArgNumber> From<crate::backend::mount::types::FsOpenFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mount::types::FsOpenFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mount")]
+impl<'a, Num: ArgNumber> From<crate::backend::mount::types::FsMountFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mount::types::FsMountFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mount")]
+impl<'a, Num: ArgNumber> From<crate::backend::mount::types::MountAttrFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mount::types::MountAttrFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mount")]
+impl<'a, Num: ArgNumber> From<crate::backend::mount::types::OpenTreeFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mount::types::OpenTreeFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mount")]
+impl<'a, Num: ArgNumber> From<crate::backend::mount::types::FsPickFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mount::types::FsPickFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mount")]
+impl<'a, Num: ArgNumber> From<crate::backend::mount::types::MoveMountFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mount::types::MoveMountFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+impl<'a, Num: ArgNumber> From<crate::io::FdFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::io::FdFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "pipe")]
+impl<'a, Num: ArgNumber> From<crate::pipe::PipeFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::pipe::PipeFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "pipe")]
+impl<'a, Num: ArgNumber> From<crate::pipe::SpliceFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::pipe::SpliceFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+impl<'a, Num: ArgNumber> From<crate::io::DupFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::io::DupFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+impl<'a, Num: ArgNumber> From<crate::io::ReadWriteFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::io::ReadWriteFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "process")]
+impl<'a, Num: ArgNumber> From<crate::process::PidfdFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::process::PidfdFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "pty")]
+impl<'a, Num: ArgNumber> From<crate::pty::OpenptFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::pty::OpenptFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "thread")]
+impl<'a, Num: ArgNumber> From<crate::thread::UnshareFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::thread::UnshareFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "event")]
+impl<'a, Num: ArgNumber> From<crate::event::EventfdFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::event::EventfdFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "event")]
+impl<'a, Num: ArgNumber> From<crate::event::epoll::CreateFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::event::epoll::CreateFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mm")]
+impl<'a, Num: ArgNumber> From<crate::backend::mm::types::ProtFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mm::types::ProtFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mm")]
+impl<'a, Num: ArgNumber> From<crate::backend::mm::types::MsyncFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mm::types::MsyncFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mm")]
+impl<'a, Num: ArgNumber> From<crate::backend::mm::types::MremapFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mm::types::MremapFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mm")]
+impl<'a, Num: ArgNumber> From<crate::backend::mm::types::MlockFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mm::types::MlockFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mm")]
+impl<'a, Num: ArgNumber> From<crate::backend::mm::types::MlockAllFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mm::types::MlockAllFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mm")]
+impl<'a, Num: ArgNumber> From<crate::backend::mm::types::MapFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mm::types::MapFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mm")]
+impl<'a, Num: ArgNumber> From<crate::backend::mm::types::MprotectFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mm::types::MprotectFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "mm")]
+impl<'a, Num: ArgNumber> From<crate::backend::mm::types::UserfaultfdFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::backend::mm::types::UserfaultfdFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "process")]
+impl<'a, Num: ArgNumber> From<crate::backend::process::types::MembarrierCommand>
+    for ArgReg<'a, Num>
+{
+    #[inline]
+    fn from(cmd: crate::backend::process::types::MembarrierCommand) -> Self {
+        c_uint(cmd as u32)
+    }
+}
+
+#[cfg(feature = "process")]
+impl<'a, Num: ArgNumber> From<crate::process::Cpuid> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(cpuid: crate::process::Cpuid) -> Self {
+        c_uint(cpuid.as_raw())
+    }
+}
+
+#[cfg(target_pointer_width = "64")]
+#[inline]
+pub(super) fn dev_t<'a, Num: ArgNumber>(dev: u64) -> ArgReg<'a, Num> {
+    pass_usize(dev as usize)
+}
+
+#[cfg(target_pointer_width = "32")]
+#[inline]
+pub(super) fn dev_t<'a, Num: ArgNumber>(dev: u64) -> io::Result<ArgReg<'a, Num>> {
+    Ok(pass_usize(dev.try_into().map_err(|_err| io::Errno::INVAL)?))
+}
+
+/// Convert a `Resource` into a syscall argument.
+#[cfg(feature = "process")]
+impl<'a, Num: ArgNumber> From<Resource> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(resource: Resource) -> Self {
+        c_uint(resource as c::c_uint)
+    }
+}
+
+#[cfg(any(feature = "process", feature = "runtime", feature = "termios"))]
+impl<'a, Num: ArgNumber> From<Pid> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(pid: Pid) -> Self {
+        pass_usize(pid.as_raw_nonzero().get() as usize)
+    }
+}
+
+#[cfg(feature = "process")]
+#[inline]
+pub(super) fn negative_pid<'a, Num: ArgNumber>(pid: Pid) -> ArgReg<'a, Num> {
+    pass_usize(pid.as_raw_nonzero().get().wrapping_neg() as usize)
+}
+
+#[cfg(any(feature = "process", feature = "runtime"))]
+impl<'a, Num: ArgNumber> From<Signal> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(sig: Signal) -> Self {
+        pass_usize(sig as usize)
+    }
+}
+
+#[cfg(feature = "io_uring")]
+impl<'a, Num: ArgNumber> From<crate::io_uring::IoringEnterFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::io_uring::IoringEnterFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "time")]
+impl<'a, Num: ArgNumber> From<crate::time::TimerfdFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::time::TimerfdFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "time")]
+impl<'a, Num: ArgNumber> From<crate::time::TimerfdTimerFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::time::TimerfdTimerFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "rand")]
+impl<'a, Num: ArgNumber> From<crate::rand::GetRandomFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::rand::GetRandomFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "net")]
+impl<'a, Num: ArgNumber> From<crate::net::RecvFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::net::RecvFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "net")]
+impl<'a, Num: ArgNumber> From<crate::net::SendFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::net::SendFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "net")]
+impl<'a, Num: ArgNumber> From<crate::net::SocketFlags> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::net::SocketFlags) -> Self {
+        c_uint(flags.bits())
+    }
+}
+
+#[cfg(feature = "net")]
+impl<'a, Num: ArgNumber> From<crate::net::AddressFamily> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(family: crate::net::AddressFamily) -> Self {
+        c_uint(family.0.into())
+    }
+}
+
+#[cfg(feature = "net")]
+impl<'a, Num: ArgNumber> From<(crate::net::SocketType, crate::net::SocketFlags)>
+    for ArgReg<'a, Num>
+{
+    #[inline]
+    fn from(pair: (crate::net::SocketType, crate::net::SocketFlags)) -> Self {
+        c_uint(pair.0 .0 | pair.1.bits())
+    }
+}
+
+#[cfg(feature = "thread")]
+impl<'a, Num: ArgNumber> From<(crate::thread::FutexOperation, crate::thread::FutexFlags)>
+    for ArgReg<'a, Num>
+{
+    #[inline]
+    fn from(pair: (crate::thread::FutexOperation, crate::thread::FutexFlags)) -> Self {
+        c_uint(pair.0 as u32 | pair.1.bits())
+    }
+}
+
+#[cfg(feature = "net")]
+impl<'a, Num: ArgNumber> From<crate::net::SocketType> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(type_: crate::net::SocketType) -> Self {
+        c_uint(type_.0)
+    }
+}
+
+#[cfg(feature = "net")]
+impl<'a, Num: ArgNumber> From<Option<crate::net::Protocol>> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(protocol: Option<crate::net::Protocol>) -> Self {
+        c_uint(match protocol {
+            Some(p) => p.0.get(),
+            None => 0,
+        })
+    }
+}
+
+impl<'a, Num: ArgNumber, T> From<&'a mut MaybeUninit<T>> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(t: &'a mut MaybeUninit<T>) -> Self {
+        raw_arg(t.as_mut_ptr().cast())
+    }
+}
+
+impl<'a, Num: ArgNumber, T> From<&'a mut [MaybeUninit<T>]> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(t: &'a mut [MaybeUninit<T>]) -> Self {
+        raw_arg(t.as_mut_ptr().cast())
+    }
+}
+
+#[cfg(any(feature = "process", feature = "thread"))]
+impl<'a, Num: ArgNumber> From<crate::ugid::Uid> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(t: crate::ugid::Uid) -> Self {
+        c_uint(t.as_raw())
+    }
+}
+
+#[cfg(any(feature = "process", feature = "thread"))]
+impl<'a, Num: ArgNumber> From<crate::ugid::Gid> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(t: crate::ugid::Gid) -> Self {
+        c_uint(t.as_raw())
+    }
+}
+
+#[cfg(feature = "runtime")]
+impl<'a, Num: ArgNumber> From<crate::runtime::How> for ArgReg<'a, Num> {
+    #[inline]
+    fn from(flags: crate::runtime::How) -> Self {
+        c_uint(flags as u32)
+    }
+}
+
+/// Convert a `usize` returned from a syscall that effectively returns `()` on
+/// success.
+///
+/// # Safety
+///
+/// The caller must ensure that this is the return value of a syscall which
+/// just returns 0 on success.
+#[inline]
+pub(super) unsafe fn ret(raw: RetReg<R0>) -> io::Result<()> {
+    try_decode_void(raw)
+}
+
+/// Convert a `usize` returned from a syscall that doesn't return on success.
+///
+/// # Safety
+///
+/// The caller must ensure that this is the return value of a syscall which
+/// doesn't return on success.
+#[cfg(any(feature = "event", feature = "runtime"))]
+#[inline]
+pub(super) unsafe fn ret_error(raw: RetReg<R0>) -> io::Errno {
+    try_decode_error(raw)
+}
+
+/// Convert a `usize` returned from a syscall that effectively always returns
+/// `()`.
+///
+/// # Safety
+///
+/// The caller must ensure that this is the return value of a syscall which
+/// always returns `()`.
+#[inline]
+pub(super) unsafe fn ret_infallible(raw: RetReg<R0>) {
+    #[cfg(debug_assertions)]
+    {
+        try_decode_void(raw).unwrap()
+    }
+    #[cfg(not(debug_assertions))]
+    drop(raw);
+}
+
+/// Convert a `usize` returned from a syscall that effectively returns a
+/// `c_int` on success.
+#[inline]
+pub(super) fn ret_c_int(raw: RetReg<R0>) -> io::Result<c::c_int> {
+    try_decode_c_int(raw)
+}
+
+/// Convert a `usize` returned from a syscall that effectively returns a
+/// `c_uint` on success.
+#[inline]
+pub(super) fn ret_c_uint(raw: RetReg<R0>) -> io::Result<c::c_uint> {
+    try_decode_c_uint(raw)
+}
+
+/// Convert a `usize` returned from a syscall that effectively returns a `u64`
+/// on success.
+#[cfg(target_pointer_width = "64")]
+#[inline]
+pub(super) fn ret_u64(raw: RetReg<R0>) -> io::Result<u64> {
+    try_decode_u64(raw)
+}
+
+/// Convert a `usize` returned from a syscall that effectively returns a
+/// `usize` on success.
+#[inline]
+pub(super) fn ret_usize(raw: RetReg<R0>) -> io::Result<usize> {
+    try_decode_usize(raw)
+}
+
+/// Convert a `usize` returned from a syscall that effectively always
+/// returns a `usize`.
+///
+/// # Safety
+///
+/// This function must only be used with return values from infallible
+/// syscalls.
+#[inline]
+pub(super) unsafe fn ret_usize_infallible(raw: RetReg<R0>) -> usize {
+    #[cfg(debug_assertions)]
+    {
+        try_decode_usize(raw).unwrap()
+    }
+    #[cfg(not(debug_assertions))]
+    {
+        decode_usize_infallible(raw)
+    }
+}
+
+/// Convert a `c_int` returned from a syscall that effectively always
+/// returns a `c_int`.
+///
+/// # Safety
+///
+/// This function must only be used with return values from infallible
+/// syscalls.
+#[inline]
+pub(super) unsafe fn ret_c_int_infallible(raw: RetReg<R0>) -> c::c_int {
+    #[cfg(debug_assertions)]
+    {
+        try_decode_c_int(raw).unwrap()
+    }
+    #[cfg(not(debug_assertions))]
+    {
+        decode_c_int_infallible(raw)
+    }
+}
+
+/// Convert a `c_uint` returned from a syscall that effectively always
+/// returns a `c_uint`.
+///
+/// # Safety
+///
+/// This function must only be used with return values from infallible
+/// syscalls.
+#[inline]
+pub(super) unsafe fn ret_c_uint_infallible(raw: RetReg<R0>) -> c::c_uint {
+    #[cfg(debug_assertions)]
+    {
+        try_decode_c_uint(raw).unwrap()
+    }
+    #[cfg(not(debug_assertions))]
+    {
+        decode_c_uint_infallible(raw)
+    }
+}
+
+/// Convert a `usize` returned from a syscall that effectively returns an
+/// `OwnedFd` on success.
+///
+/// # Safety
+///
+/// The caller must ensure that this is the return value of a syscall which
+/// returns an owned file descriptor.
+#[inline]
+pub(super) unsafe fn ret_owned_fd(raw: RetReg<R0>) -> io::Result<OwnedFd> {
+    let raw_fd = try_decode_raw_fd(raw)?;
+    Ok(crate::backend::fd::OwnedFd::from_raw_fd(raw_fd))
+}
+
+/// Convert the return value of `dup2` and `dup3`.
+///
+/// When these functions succeed, they return the same value as their second
+/// argument, so we don't construct a new `OwnedFd`.
+///
+/// # Safety
+///
+/// The caller must ensure that this is the return value of a syscall which
+/// returns a file descriptor.
+#[inline]
+pub(super) unsafe fn ret_discarded_fd(raw: RetReg<R0>) -> io::Result<()> {
+    let _raw_fd = try_decode_raw_fd(raw)?;
+    Ok(())
+}
+
+/// Convert a `usize` returned from a syscall that effectively returns a
+/// `*mut c_void` on success.
+#[inline]
+pub(super) fn ret_void_star(raw: RetReg<R0>) -> io::Result<*mut c::c_void> {
+    try_decode_void_star(raw)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/event/epoll.rs b/vendor/rustix/src/backend/linux_raw/event/epoll.rs
new file mode 100644
index 0000000..3d5787b
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/event/epoll.rs
@@ -0,0 +1,470 @@
+//! Linux `epoll` support.
+//!
+//! # Examples
+//!
+//! ```no_run
+//! # #[cfg(feature = "net")]
+//! # fn main() -> std::io::Result<()> {
+//! use rustix::event::epoll;
+//! use rustix::fd::AsFd;
+//! use rustix::io::{ioctl_fionbio, read, write};
+//! use rustix::net::{
+//!     accept, bind_v4, listen, socket, AddressFamily, Ipv4Addr, SocketAddrV4, SocketType,
+//! };
+//! use std::collections::HashMap;
+//! use std::os::unix::io::AsRawFd;
+//!
+//! // Create a socket and listen on it.
+//! let listen_sock = socket(AddressFamily::INET, SocketType::STREAM, None)?;
+//! bind_v4(&listen_sock, &SocketAddrV4::new(Ipv4Addr::LOCALHOST, 0))?;
+//! listen(&listen_sock, 1)?;
+//!
+//! // Create an epoll object. Using `Owning` here means the epoll object will
+//! // take ownership of the file descriptors registered with it.
+//! let epoll = epoll::create(epoll::CreateFlags::CLOEXEC)?;
+//!
+//! // Register the socket with the epoll object.
+//! epoll::add(
+//!     &epoll,
+//!     &listen_sock,
+//!     epoll::EventData::new_u64(1),
+//!     epoll::EventFlags::IN,
+//! )?;
+//!
+//! // Keep track of the sockets we've opened.
+//! let mut next_id = epoll::EventData::new_u64(2);
+//! let mut sockets = HashMap::new();
+//!
+//! // Process events.
+//! let mut event_list = epoll::EventVec::with_capacity(4);
+//! loop {
+//!     epoll::wait(&epoll, &mut event_list, -1)?;
+//!     for event in &event_list {
+//!         let target = event.data;
+//!         if target.u64() == 1 {
+//!             // Accept a new connection, set it to non-blocking, and
+//!             // register to be notified when it's ready to write to.
+//!             let conn_sock = accept(&listen_sock)?;
+//!             ioctl_fionbio(&conn_sock, true)?;
+//!             epoll::add(
+//!                 &epoll,
+//!                 &conn_sock,
+//!                 next_id,
+//!                 epoll::EventFlags::OUT | epoll::EventFlags::ET,
+//!             )?;
+//!
+//!             // Keep track of the socket.
+//!             sockets.insert(next_id, conn_sock);
+//!             next_id = epoll::EventData::new_u64(next_id.u64() + 1);
+//!         } else {
+//!             // Write a message to the stream and then unregister it.
+//!             let target = sockets.remove(&target).unwrap();
+//!             write(&target, b"hello\n")?;
+//!             let _ = epoll::delete(&epoll, &target)?;
+//!         }
+//!     }
+//! }
+//! # }
+//! # #[cfg(not(feature = "net"))]
+//! # fn main() {}
+//! ```
+
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+use crate::backend::event::syscalls;
+use crate::fd::{AsFd, AsRawFd, OwnedFd};
+use crate::io;
+#[cfg(feature = "alloc")]
+use alloc::vec::Vec;
+use bitflags::bitflags;
+use core::ffi::c_void;
+use core::hash::{Hash, Hasher};
+use core::slice;
+
+bitflags! {
+    /// `EPOLL_*` for use with [`new`].
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct CreateFlags: c::c_uint {
+        /// `EPOLL_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::EPOLL_CLOEXEC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `EPOLL*` for use with [`add`].
+    #[repr(transparent)]
+    #[derive(Default, Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct EventFlags: u32 {
+        /// `EPOLLIN`
+        const IN = linux_raw_sys::general::EPOLLIN as u32;
+
+        /// `EPOLLOUT`
+        const OUT = linux_raw_sys::general::EPOLLOUT as u32;
+
+        /// `EPOLLPRI`
+        const PRI = linux_raw_sys::general::EPOLLPRI as u32;
+
+        /// `EPOLLERR`
+        const ERR = linux_raw_sys::general::EPOLLERR as u32;
+
+        /// `EPOLLHUP`
+        const HUP = linux_raw_sys::general::EPOLLHUP as u32;
+
+        /// `EPOLLRDNORM`
+        const RDNORM = linux_raw_sys::general::EPOLLRDNORM as u32;
+
+        /// `EPOLLRDBAND`
+        const RDBAND = linux_raw_sys::general::EPOLLRDBAND as u32;
+
+        /// `EPOLLWRNORM`
+        const WRNORM = linux_raw_sys::general::EPOLLWRNORM as u32;
+
+        /// `EPOLLWRBAND`
+        const WRBAND = linux_raw_sys::general::EPOLLWRBAND as u32;
+
+        /// `EPOLLMSG`
+        const MSG = linux_raw_sys::general::EPOLLMSG as u32;
+
+        /// `EPOLLRDHUP`
+        const RDHUP = linux_raw_sys::general::EPOLLRDHUP as u32;
+
+        /// `EPOLLET`
+        const ET = linux_raw_sys::general::EPOLLET as u32;
+
+        /// `EPOLLONESHOT`
+        const ONESHOT = linux_raw_sys::general::EPOLLONESHOT as u32;
+
+        /// `EPOLLWAKEUP`
+        const WAKEUP = linux_raw_sys::general::EPOLLWAKEUP as u32;
+
+        /// `EPOLLEXCLUSIVE`
+        const EXCLUSIVE = linux_raw_sys::general::EPOLLEXCLUSIVE as u32;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `epoll_create1(flags)`—Creates a new epoll object.
+///
+/// Use the [`CreateFlags::CLOEXEC`] flag to prevent the resulting file
+/// descriptor from being implicitly passed across `exec` boundaries.
+#[inline]
+#[doc(alias = "epoll_create1")]
+pub fn create(flags: CreateFlags) -> io::Result<OwnedFd> {
+    syscalls::epoll_create(flags)
+}
+
+/// `epoll_ctl(self, EPOLL_CTL_ADD, data, event)`—Adds an element to an epoll
+/// object.
+///
+/// This registers interest in any of the events set in `events` occurring on
+/// the file descriptor associated with `data`.
+///
+/// If [`delete`] is not called on the I/O source passed into this function
+/// before the I/O source is `close`d, then the `epoll` will act as if the I/O
+/// source is still registered with it. This can lead to spurious events being
+/// returned from [`wait`]. If a file descriptor is an
+/// `Arc<dyn SystemResource>`, then `epoll` can be thought to maintain a
+/// `Weak<dyn SystemResource>` to the file descriptor.
+#[doc(alias = "epoll_ctl")]
+#[inline]
+pub fn add(
+    epoll: impl AsFd,
+    source: impl AsFd,
+    data: EventData,
+    event_flags: EventFlags,
+) -> io::Result<()> {
+    // SAFETY: We're calling `epoll_ctl` via FFI and we know how it
+    // behaves.
+    unsafe {
+        syscalls::epoll_add(
+            epoll.as_fd(),
+            source.as_fd().as_raw_fd(),
+            &Event {
+                flags: event_flags,
+                data,
+            },
+        )
+    }
+}
+
+/// `epoll_ctl(self, EPOLL_CTL_MOD, target, event)`—Modifies an element in a
+/// given epoll object.
+///
+/// This sets the events of interest with `target` to `events`.
+#[doc(alias = "epoll_ctl")]
+#[inline]
+pub fn modify(
+    epoll: impl AsFd,
+    source: impl AsFd,
+    data: EventData,
+    event_flags: EventFlags,
+) -> io::Result<()> {
+    // SAFETY: We're calling `epoll_ctl` via FFI and we know how it
+    // behaves.
+    unsafe {
+        let raw_fd = source.as_fd().as_raw_fd();
+        syscalls::epoll_mod(
+            epoll.as_fd(),
+            raw_fd,
+            &Event {
+                flags: event_flags,
+                data,
+            },
+        )
+    }
+}
+
+/// `epoll_ctl(self, EPOLL_CTL_DEL, target, NULL)`—Removes an element in a
+/// given epoll object.
+#[doc(alias = "epoll_ctl")]
+#[inline]
+pub fn delete(epoll: impl AsFd, source: impl AsFd) -> io::Result<()> {
+    // SAFETY: We're calling `epoll_ctl` via FFI and we know how it
+    // behaves.
+    unsafe {
+        let raw_fd = source.as_fd().as_raw_fd();
+        syscalls::epoll_del(epoll.as_fd(), raw_fd)
+    }
+}
+
+/// `epoll_wait(self, events, timeout)`—Waits for registered events of
+/// interest.
+///
+/// For each event of interest, an element is written to `events`. On
+/// success, this returns the number of written elements.
+#[cfg(feature = "alloc")]
+#[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
+#[inline]
+pub fn wait(epoll: impl AsFd, event_list: &mut EventVec, timeout: c::c_int) -> io::Result<()> {
+    // SAFETY: We're calling `epoll_wait` via FFI and we know how it
+    // behaves.
+    unsafe {
+        event_list.events.set_len(0);
+        let nfds = syscalls::epoll_wait(
+            epoll.as_fd(),
+            event_list.events[..].as_mut_ptr().cast(),
+            event_list.events.capacity(),
+            timeout,
+        )?;
+        event_list.events.set_len(nfds);
+    }
+
+    Ok(())
+}
+
+/// An iterator over the `Event`s in an `EventVec`.
+pub struct Iter<'a> {
+    /// Use `Copied` to copy the struct, since `Event` is `packed` on some
+    /// platforms, and it's common for users to directly destructure it, which
+    /// would lead to errors about forming references to packed fields.
+    iter: core::iter::Copied<slice::Iter<'a, Event>>,
+}
+
+impl<'a> Iterator for Iter<'a> {
+    type Item = Event;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next()
+    }
+}
+
+/// A record of an event that occurred.
+#[repr(C)]
+#[cfg_attr(target_arch = "x86_64", repr(packed))]
+#[derive(Copy, Clone, Eq, PartialEq, Hash)]
+pub struct Event {
+    /// Which specific event(s) occurred.
+    pub flags: EventFlags,
+    /// User data.
+    pub data: EventData,
+}
+
+/// Data associated with an [`Event`]. This can either be a 64-bit integer
+/// value or a pointer which preserves pointer provenance.
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub union EventData {
+    /// A 64-bit integer value.
+    as_u64: u64,
+
+    /// A `*mut c_void` which preserves pointer provenance, extended to be
+    /// 64-bit so that if we read the value as a `u64` union field, we don't
+    /// get uninitialized memory.
+    sixty_four_bit_pointer: SixtyFourBitPointer,
+}
+
+impl EventData {
+    /// Construct a new value containing a `u64`.
+    #[inline]
+    pub const fn new_u64(value: u64) -> Self {
+        Self { as_u64: value }
+    }
+
+    /// Construct a new value containing a `*mut c_void`.
+    #[inline]
+    pub const fn new_ptr(value: *mut c_void) -> Self {
+        Self {
+            sixty_four_bit_pointer: SixtyFourBitPointer {
+                pointer: value,
+                #[cfg(target_pointer_width = "32")]
+                _padding: 0,
+            },
+        }
+    }
+
+    /// Return the value as a `u64`.
+    ///
+    /// If the stored value was a pointer, the pointer is zero-extended to a
+    /// `u64`.
+    #[inline]
+    pub fn u64(self) -> u64 {
+        unsafe { self.as_u64 }
+    }
+
+    /// Return the value as a `*mut c_void`.
+    ///
+    /// If the stored value was a `u64`, the least-significant bits of the
+    /// `u64` are returned as a pointer value.
+    #[inline]
+    pub fn ptr(self) -> *mut c_void {
+        unsafe { self.sixty_four_bit_pointer.pointer }
+    }
+}
+
+impl PartialEq for EventData {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.u64() == other.u64()
+    }
+}
+
+impl Eq for EventData {}
+
+impl Hash for EventData {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.u64().hash(state)
+    }
+}
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+struct SixtyFourBitPointer {
+    #[cfg(target_endian = "big")]
+    #[cfg(target_pointer_width = "32")]
+    _padding: u32,
+
+    pointer: *mut c_void,
+
+    #[cfg(target_endian = "little")]
+    #[cfg(target_pointer_width = "32")]
+    _padding: u32,
+}
+
+/// A vector of `Event`s, plus context for interpreting them.
+#[cfg(feature = "alloc")]
+pub struct EventVec {
+    events: Vec<Event>,
+}
+
+#[cfg(feature = "alloc")]
+impl EventVec {
+    /// Constructs an `EventVec` from raw pointer, length, and capacity.
+    ///
+    /// # Safety
+    ///
+    /// This function calls [`Vec::from_raw_parts`] with its arguments.
+    ///
+    /// [`Vec::from_raw_parts`]: https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.from_raw_parts
+    #[inline]
+    pub unsafe fn from_raw_parts(ptr: *mut Event, len: usize, capacity: usize) -> Self {
+        Self {
+            events: Vec::from_raw_parts(ptr, len, capacity),
+        }
+    }
+
+    /// Constructs an `EventVec` with memory for `capacity` `Event`s.
+    #[inline]
+    pub fn with_capacity(capacity: usize) -> Self {
+        Self {
+            events: Vec::with_capacity(capacity),
+        }
+    }
+
+    /// Returns the current `Event` capacity of this `EventVec`.
+    #[inline]
+    pub fn capacity(&self) -> usize {
+        self.events.capacity()
+    }
+
+    /// Reserves enough memory for at least `additional` more `Event`s.
+    #[inline]
+    pub fn reserve(&mut self, additional: usize) {
+        self.events.reserve(additional);
+    }
+
+    /// Reserves enough memory for exactly `additional` more `Event`s.
+    #[inline]
+    pub fn reserve_exact(&mut self, additional: usize) {
+        self.events.reserve_exact(additional);
+    }
+
+    /// Clears all the `Events` out of this `EventVec`.
+    #[inline]
+    pub fn clear(&mut self) {
+        self.events.clear();
+    }
+
+    /// Shrinks the capacity of this `EventVec` as much as possible.
+    #[inline]
+    pub fn shrink_to_fit(&mut self) {
+        self.events.shrink_to_fit();
+    }
+
+    /// Returns an iterator over the `Event`s in this `EventVec`.
+    #[inline]
+    pub fn iter(&self) -> Iter<'_> {
+        Iter {
+            iter: self.events.iter().copied(),
+        }
+    }
+
+    /// Returns the number of `Event`s logically contained in this `EventVec`.
+    #[inline]
+    pub fn len(&mut self) -> usize {
+        self.events.len()
+    }
+
+    /// Tests whether this `EventVec` is logically empty.
+    #[inline]
+    pub fn is_empty(&mut self) -> bool {
+        self.events.is_empty()
+    }
+}
+
+#[cfg(feature = "alloc")]
+impl<'a> IntoIterator for &'a EventVec {
+    type IntoIter = Iter<'a>;
+    type Item = Event;
+
+    #[inline]
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
+#[test]
+fn test_epoll_layouts() {
+    check_renamed_type!(Event, epoll_event);
+    check_renamed_type!(Event, epoll_event);
+    check_renamed_struct_renamed_field!(Event, epoll_event, flags, events);
+    check_renamed_struct_renamed_field!(Event, epoll_event, data, data);
+}
diff --git a/vendor/rustix/src/backend/linux_raw/event/mod.rs b/vendor/rustix/src/backend/linux_raw/event/mod.rs
new file mode 100644
index 0000000..605de25
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/event/mod.rs
@@ -0,0 +1,4 @@
+pub mod epoll;
+pub(crate) mod poll_fd;
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs b/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs
new file mode 100644
index 0000000..9de43f2
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs
@@ -0,0 +1,98 @@
+use crate::fd::{AsFd, BorrowedFd};
+use bitflags::bitflags;
+
+bitflags! {
+    /// `POLL*` flags for use with [`poll`].
+    ///
+    /// [`poll`]: crate::event::poll
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct PollFlags: u16 {
+        /// `POLLIN`
+        const IN = linux_raw_sys::general::POLLIN as u16;
+        /// `POLLPRI`
+        const PRI = linux_raw_sys::general::POLLPRI as u16;
+        /// `POLLOUT`
+        const OUT = linux_raw_sys::general::POLLOUT as u16;
+        /// `POLLRDNORM`
+        const RDNORM = linux_raw_sys::general::POLLRDNORM as u16;
+        /// `POLLWRNORM`
+        const WRNORM = linux_raw_sys::general::POLLWRNORM as u16;
+        /// `POLLRDBAND`
+        const RDBAND = linux_raw_sys::general::POLLRDBAND as u16;
+        /// `POLLWRBAND`
+        const WRBAND = linux_raw_sys::general::POLLWRBAND as u16;
+        /// `POLLERR`
+        const ERR = linux_raw_sys::general::POLLERR as u16;
+        /// `POLLHUP`
+        const HUP = linux_raw_sys::general::POLLHUP as u16;
+        /// `POLLNVAL`
+        const NVAL = linux_raw_sys::general::POLLNVAL as u16;
+        /// `POLLRDHUP`
+        const RDHUP = linux_raw_sys::general::POLLRDHUP as u16;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `struct pollfd`—File descriptor and flags for use with [`poll`].
+///
+/// [`poll`]: crate::event::poll
+#[doc(alias = "pollfd")]
+#[repr(C)]
+#[derive(Debug, Clone)]
+pub struct PollFd<'fd> {
+    pub(crate) fd: BorrowedFd<'fd>,
+    pub(crate) events: u16,
+    pub(crate) revents: u16,
+}
+
+impl<'fd> PollFd<'fd> {
+    /// Constructs a new `PollFd` holding `fd` and `events`.
+    #[inline]
+    pub fn new<Fd: AsFd>(fd: &'fd Fd, events: PollFlags) -> Self {
+        Self::from_borrowed_fd(fd.as_fd(), events)
+    }
+
+    /// Sets the contained file descriptor to `fd`.
+    #[inline]
+    pub fn set_fd<Fd: AsFd>(&mut self, fd: &'fd Fd) {
+        self.fd = fd.as_fd();
+    }
+
+    /// Clears the ready events.
+    #[inline]
+    pub fn clear_revents(&mut self) {
+        self.revents = 0;
+    }
+
+    /// Constructs a new `PollFd` holding `fd` and `events`.
+    ///
+    /// This is the same as `new`, but can be used to avoid borrowing the
+    /// `BorrowedFd`, which can be tricky in situations where the `BorrowedFd`
+    /// is a temporary.
+    #[inline]
+    pub fn from_borrowed_fd(fd: BorrowedFd<'fd>, events: PollFlags) -> Self {
+        Self {
+            fd,
+            events: events.bits(),
+            revents: 0,
+        }
+    }
+
+    /// Returns the ready events.
+    #[inline]
+    pub fn revents(&self) -> PollFlags {
+        // Use `.unwrap()` here because in theory we know we know all the bits
+        // the OS might set here, but OS's have added extensions in the past.
+        PollFlags::from_bits(self.revents).unwrap()
+    }
+}
+
+impl<'fd> AsFd for PollFd<'fd> {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        self.fd.as_fd()
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/event/syscalls.rs b/vendor/rustix/src/backend/linux_raw/event/syscalls.rs
new file mode 100644
index 0000000..0ae7753
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/event/syscalls.rs
@@ -0,0 +1,152 @@
+//! linux_raw syscalls supporting `rustix::event`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+#[cfg(feature = "alloc")]
+use crate::backend::conv::pass_usize;
+use crate::backend::conv::{
+    by_ref, c_int, c_uint, raw_fd, ret, ret_error, ret_owned_fd, ret_usize, slice_mut, zero,
+};
+use crate::event::{epoll, EventfdFlags, PollFd};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io;
+use linux_raw_sys::general::{EPOLL_CTL_ADD, EPOLL_CTL_DEL, EPOLL_CTL_MOD};
+#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+use {
+    crate::backend::conv::{opt_ref, size_of},
+    linux_raw_sys::general::{__kernel_timespec, kernel_sigset_t},
+};
+
+#[inline]
+pub(crate) fn poll(fds: &mut [PollFd<'_>], timeout: c::c_int) -> io::Result<usize> {
+    let (fds_addr_mut, fds_len) = slice_mut(fds);
+
+    #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+    unsafe {
+        let timeout = if timeout >= 0 {
+            Some(__kernel_timespec {
+                tv_sec: (timeout as i64) / 1000,
+                tv_nsec: (timeout as i64) % 1000 * 1_000_000,
+            })
+        } else {
+            None
+        };
+        ret_usize(syscall!(
+            __NR_ppoll,
+            fds_addr_mut,
+            fds_len,
+            opt_ref(timeout.as_ref()),
+            zero(),
+            size_of::<kernel_sigset_t, _>()
+        ))
+    }
+    #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+    unsafe {
+        ret_usize(syscall!(__NR_poll, fds_addr_mut, fds_len, c_int(timeout)))
+    }
+}
+
+#[inline]
+pub(crate) fn epoll_create(flags: epoll::CreateFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_epoll_create1, flags)) }
+}
+
+#[inline]
+pub(crate) unsafe fn epoll_add(
+    epfd: BorrowedFd<'_>,
+    fd: c::c_int,
+    event: &epoll::Event,
+) -> io::Result<()> {
+    ret(syscall_readonly!(
+        __NR_epoll_ctl,
+        epfd,
+        c_uint(EPOLL_CTL_ADD),
+        raw_fd(fd),
+        by_ref(event)
+    ))
+}
+
+#[inline]
+pub(crate) unsafe fn epoll_mod(
+    epfd: BorrowedFd<'_>,
+    fd: c::c_int,
+    event: &epoll::Event,
+) -> io::Result<()> {
+    ret(syscall_readonly!(
+        __NR_epoll_ctl,
+        epfd,
+        c_uint(EPOLL_CTL_MOD),
+        raw_fd(fd),
+        by_ref(event)
+    ))
+}
+
+#[inline]
+pub(crate) unsafe fn epoll_del(epfd: BorrowedFd<'_>, fd: c::c_int) -> io::Result<()> {
+    ret(syscall_readonly!(
+        __NR_epoll_ctl,
+        epfd,
+        c_uint(EPOLL_CTL_DEL),
+        raw_fd(fd),
+        zero()
+    ))
+}
+
+#[cfg(feature = "alloc")]
+#[inline]
+pub(crate) fn epoll_wait(
+    epfd: BorrowedFd<'_>,
+    events: *mut epoll::Event,
+    num_events: usize,
+    timeout: c::c_int,
+) -> io::Result<usize> {
+    #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+    unsafe {
+        ret_usize(syscall!(
+            __NR_epoll_wait,
+            epfd,
+            events,
+            pass_usize(num_events),
+            c_int(timeout)
+        ))
+    }
+    #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+    unsafe {
+        ret_usize(syscall!(
+            __NR_epoll_pwait,
+            epfd,
+            events,
+            pass_usize(num_events),
+            c_int(timeout),
+            zero()
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn eventfd(initval: u32, flags: EventfdFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_eventfd2, c_uint(initval), flags)) }
+}
+
+#[inline]
+pub(crate) fn pause() {
+    unsafe {
+        #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+        let error = ret_error(syscall_readonly!(
+            __NR_ppoll,
+            zero(),
+            zero(),
+            zero(),
+            zero()
+        ));
+
+        #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+        let error = ret_error(syscall_readonly!(__NR_pause));
+
+        debug_assert_eq!(error, io::Errno::INTR);
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/event/types.rs b/vendor/rustix/src/backend/linux_raw/event/types.rs
new file mode 100644
index 0000000..01611f6
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/event/types.rs
@@ -0,0 +1,21 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `EFD_*` flags for use with [`eventfd`].
+    ///
+    /// [`eventfd`]: crate::event::eventfd
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct EventfdFlags: c::c_uint {
+        /// `EFD_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::EFD_CLOEXEC;
+        /// `EFD_NONBLOCK`
+        const NONBLOCK = linux_raw_sys::general::EFD_NONBLOCK;
+        /// `EFD_SEMAPHORE`
+        const SEMAPHORE = linux_raw_sys::general::EFD_SEMAPHORE;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/fs/dir.rs b/vendor/rustix/src/backend/linux_raw/fs/dir.rs
new file mode 100644
index 0000000..dbddd58
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/fs/dir.rs
@@ -0,0 +1,315 @@
+use crate::fd::{AsFd, BorrowedFd, OwnedFd};
+use crate::ffi::{CStr, CString};
+use crate::fs::{
+    fcntl_getfl, fstat, fstatfs, fstatvfs, openat, FileType, Mode, OFlags, Stat, StatFs, StatVfs,
+};
+use crate::io;
+#[cfg(feature = "process")]
+use crate::process::fchdir;
+use crate::utils::as_ptr;
+use alloc::borrow::ToOwned;
+use alloc::vec::Vec;
+use core::fmt;
+use core::mem::size_of;
+use linux_raw_sys::general::{linux_dirent64, SEEK_SET};
+
+/// `DIR*`
+pub struct Dir {
+    /// The `OwnedFd` that we read directory entries from.
+    fd: OwnedFd,
+
+    /// Have we seen any errors in this iteration?
+    any_errors: bool,
+
+    /// Should we rewind the stream on the next iteration?
+    rewind: bool,
+
+    /// The buffer for `linux_dirent64` entries.
+    buf: Vec<u8>,
+
+    /// Where we are in the buffer.
+    pos: usize,
+}
+
+impl Dir {
+    /// Take ownership of `fd` and construct a `Dir` that reads entries from
+    /// the given directory file descriptor.
+    #[inline]
+    pub fn new<Fd: Into<OwnedFd>>(fd: Fd) -> io::Result<Self> {
+        Self::_new(fd.into())
+    }
+
+    #[inline]
+    fn _new(fd: OwnedFd) -> io::Result<Self> {
+        Ok(Self {
+            fd,
+            any_errors: false,
+            rewind: false,
+            buf: Vec::new(),
+            pos: 0,
+        })
+    }
+
+    /// Borrow `fd` and construct a `Dir` that reads entries from the given
+    /// directory file descriptor.
+    #[inline]
+    pub fn read_from<Fd: AsFd>(fd: Fd) -> io::Result<Self> {
+        Self::_read_from(fd.as_fd())
+    }
+
+    #[inline]
+    fn _read_from(fd: BorrowedFd<'_>) -> io::Result<Self> {
+        let flags = fcntl_getfl(fd)?;
+        let fd_for_dir = openat(fd, cstr!("."), flags | OFlags::CLOEXEC, Mode::empty())?;
+
+        Ok(Self {
+            fd: fd_for_dir,
+            any_errors: false,
+            rewind: false,
+            buf: Vec::new(),
+            pos: 0,
+        })
+    }
+
+    /// `rewinddir(self)`
+    #[inline]
+    pub fn rewind(&mut self) {
+        self.any_errors = false;
+        self.rewind = true;
+        self.pos = self.buf.len();
+    }
+
+    /// `readdir(self)`, where `None` means the end of the directory.
+    pub fn read(&mut self) -> Option<io::Result<DirEntry>> {
+        // If we've seen errors, don't continue to try to read anyting further.
+        if self.any_errors {
+            return None;
+        }
+
+        // If a rewind was requested, seek to the beginning.
+        if self.rewind {
+            self.rewind = false;
+            match io::retry_on_intr(|| {
+                crate::backend::fs::syscalls::_seek(self.fd.as_fd(), 0, SEEK_SET)
+            }) {
+                Ok(_) => (),
+                Err(err) => {
+                    self.any_errors = true;
+                    return Some(Err(err));
+                }
+            }
+        }
+
+        // Compute linux_dirent64 field offsets.
+        let z = linux_dirent64 {
+            d_ino: 0_u64,
+            d_off: 0_i64,
+            d_type: 0_u8,
+            d_reclen: 0_u16,
+            d_name: Default::default(),
+        };
+        let base = as_ptr(&z) as usize;
+        let offsetof_d_reclen = (as_ptr(&z.d_reclen) as usize) - base;
+        let offsetof_d_name = (as_ptr(&z.d_name) as usize) - base;
+        let offsetof_d_ino = (as_ptr(&z.d_ino) as usize) - base;
+        let offsetof_d_type = (as_ptr(&z.d_type) as usize) - base;
+
+        // Test if we need more entries, and if so, read more.
+        if self.buf.len() - self.pos < size_of::<linux_dirent64>() {
+            match self.read_more()? {
+                Ok(()) => (),
+                Err(err) => return Some(Err(err)),
+            }
+        }
+
+        // We successfully read an entry. Extract the fields.
+        let pos = self.pos;
+
+        // Do an unaligned u16 load.
+        let d_reclen = u16::from_ne_bytes([
+            self.buf[pos + offsetof_d_reclen],
+            self.buf[pos + offsetof_d_reclen + 1],
+        ]);
+        assert!(self.buf.len() - pos >= d_reclen as usize);
+        self.pos += d_reclen as usize;
+
+        // Read the NUL-terminated name from the `d_name` field. Without
+        // `unsafe`, we need to scan for the NUL twice: once to obtain a size
+        // for the slice, and then once within `CStr::from_bytes_with_nul`.
+        let name_start = pos + offsetof_d_name;
+        let name_len = self.buf[name_start..]
+            .iter()
+            .position(|x| *x == b'\0')
+            .unwrap();
+        let name = CStr::from_bytes_with_nul(&self.buf[name_start..][..=name_len]).unwrap();
+        let name = name.to_owned();
+        assert!(name.as_bytes().len() <= self.buf.len() - name_start);
+
+        // Do an unaligned u64 load.
+        let d_ino = u64::from_ne_bytes([
+            self.buf[pos + offsetof_d_ino],
+            self.buf[pos + offsetof_d_ino + 1],
+            self.buf[pos + offsetof_d_ino + 2],
+            self.buf[pos + offsetof_d_ino + 3],
+            self.buf[pos + offsetof_d_ino + 4],
+            self.buf[pos + offsetof_d_ino + 5],
+            self.buf[pos + offsetof_d_ino + 6],
+            self.buf[pos + offsetof_d_ino + 7],
+        ]);
+
+        let d_type = self.buf[pos + offsetof_d_type];
+
+        // Check that our types correspond to the `linux_dirent64` types.
+        let _ = linux_dirent64 {
+            d_ino,
+            d_off: 0,
+            d_type,
+            d_reclen,
+            d_name: Default::default(),
+        };
+
+        Some(Ok(DirEntry {
+            d_ino,
+            d_type,
+            name,
+        }))
+    }
+
+    #[must_use]
+    fn read_more(&mut self) -> Option<io::Result<()>> {
+        // The first few times we're called, we allocate a relatively small
+        // buffer, because many directories are small. If we're called more,
+        // use progressively larger allocations, up to a fixed maximum.
+        //
+        // The specific sizes and policy here have not been tuned in detail yet
+        // and may need to be adjusted. In doing so, we should be careful to
+        // avoid unbounded buffer growth. This buffer only exists to share the
+        // cost of a `getdents` call over many entries, so if it gets too big,
+        // cache and heap usage will outweigh the benefit. And ultimately,
+        // directories can contain more entries than we can allocate contiguous
+        // memory for, so we'll always need to cap the size at some point.
+        if self.buf.len() < 1024 * size_of::<linux_dirent64>() {
+            self.buf.reserve(32 * size_of::<linux_dirent64>());
+        }
+        self.buf.resize(self.buf.capacity(), 0);
+        let nread = match io::retry_on_intr(|| {
+            crate::backend::fs::syscalls::getdents(self.fd.as_fd(), &mut self.buf)
+        }) {
+            Ok(nread) => nread,
+            Err(io::Errno::NOENT) => {
+                self.any_errors = true;
+                return None;
+            }
+            Err(err) => {
+                self.any_errors = true;
+                return Some(Err(err));
+            }
+        };
+        self.buf.resize(nread, 0);
+        self.pos = 0;
+        if nread == 0 {
+            None
+        } else {
+            Some(Ok(()))
+        }
+    }
+
+    /// `fstat(self)`
+    #[inline]
+    pub fn stat(&self) -> io::Result<Stat> {
+        fstat(&self.fd)
+    }
+
+    /// `fstatfs(self)`
+    #[inline]
+    pub fn statfs(&self) -> io::Result<StatFs> {
+        fstatfs(&self.fd)
+    }
+
+    /// `fstatvfs(self)`
+    #[inline]
+    pub fn statvfs(&self) -> io::Result<StatVfs> {
+        fstatvfs(&self.fd)
+    }
+
+    /// `fchdir(self)`
+    #[cfg(feature = "process")]
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "process")))]
+    #[inline]
+    pub fn chdir(&self) -> io::Result<()> {
+        fchdir(&self.fd)
+    }
+}
+
+impl Iterator for Dir {
+    type Item = io::Result<DirEntry>;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        Self::read(self)
+    }
+}
+
+impl fmt::Debug for Dir {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Dir").field("fd", &self.fd).finish()
+    }
+}
+
+/// `struct dirent`
+#[derive(Debug)]
+pub struct DirEntry {
+    d_ino: u64,
+    d_type: u8,
+    name: CString,
+}
+
+impl DirEntry {
+    /// Returns the file name of this directory entry.
+    #[inline]
+    pub fn file_name(&self) -> &CStr {
+        &self.name
+    }
+
+    /// Returns the type of this directory entry.
+    #[inline]
+    pub fn file_type(&self) -> FileType {
+        FileType::from_dirent_d_type(self.d_type)
+    }
+
+    /// Return the inode number of this directory entry.
+    #[inline]
+    pub fn ino(&self) -> u64 {
+        self.d_ino
+    }
+}
+
+#[test]
+fn dir_iterator_handles_io_errors() {
+    // create a dir, keep the FD, then delete the dir
+    let tmp = tempfile::tempdir().unwrap();
+    let fd = crate::fs::openat(
+        crate::fs::CWD,
+        tmp.path(),
+        crate::fs::OFlags::RDONLY | crate::fs::OFlags::CLOEXEC,
+        crate::fs::Mode::empty(),
+    )
+    .unwrap();
+
+    let file_fd = crate::fs::openat(
+        &fd,
+        tmp.path().join("test.txt"),
+        crate::fs::OFlags::WRONLY | crate::fs::OFlags::CREATE,
+        crate::fs::Mode::RWXU,
+    )
+    .unwrap();
+
+    let mut dir = Dir::read_from(&fd).unwrap();
+
+    // Reach inside the `Dir` and replace its directory with a file, which
+    // will cause the subsequent `getdents64` to fail.
+    crate::io::dup2(&file_fd, &mut dir.fd).unwrap();
+
+    assert!(matches!(dir.next(), Some(Err(_))));
+    assert!(dir.next().is_none());
+}
diff --git a/vendor/rustix/src/backend/linux_raw/fs/inotify.rs b/vendor/rustix/src/backend/linux_raw/fs/inotify.rs
new file mode 100644
index 0000000..851335b
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/fs/inotify.rs
@@ -0,0 +1,118 @@
+//! inotify support for working with inotifies
+
+use crate::backend::c;
+use crate::backend::fs::syscalls;
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `IN_*` for use with [`inotify_init`].
+    ///
+    /// [`inotify_init`]: crate::fs::inotify::inotify_init
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct CreateFlags: c::c_uint {
+        /// `IN_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::IN_CLOEXEC;
+        /// `IN_NONBLOCK`
+        const NONBLOCK = linux_raw_sys::general::IN_NONBLOCK;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `IN*` for use with [`inotify_add_watch`].
+    ///
+    /// [`inotify_add_watch`]: crate::fs::inotify::inotify_add_watch
+    #[repr(transparent)]
+    #[derive(Default, Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct WatchFlags: c::c_uint {
+        /// `IN_ACCESS`
+        const ACCESS = linux_raw_sys::general::IN_ACCESS;
+        /// `IN_ATTRIB`
+        const ATTRIB = linux_raw_sys::general::IN_ATTRIB;
+        /// `IN_CLOSE_NOWRITE`
+        const CLOSE_NOWRITE = linux_raw_sys::general::IN_CLOSE_NOWRITE;
+        /// `IN_CLOSE_WRITE`
+        const CLOSE_WRITE = linux_raw_sys::general::IN_CLOSE_WRITE;
+        /// `IN_CREATE`
+        const CREATE = linux_raw_sys::general::IN_CREATE;
+        /// `IN_DELETE`
+        const DELETE = linux_raw_sys::general::IN_DELETE;
+        /// `IN_DELETE_SELF`
+        const DELETE_SELF = linux_raw_sys::general::IN_DELETE_SELF;
+        /// `IN_MODIFY`
+        const MODIFY = linux_raw_sys::general::IN_MODIFY;
+        /// `IN_MOVE_SELF`
+        const MOVE_SELF = linux_raw_sys::general::IN_MOVE_SELF;
+        /// `IN_MOVED_FROM`
+        const MOVED_FROM = linux_raw_sys::general::IN_MOVED_FROM;
+        /// `IN_MOVED_TO`
+        const MOVED_TO = linux_raw_sys::general::IN_MOVED_TO;
+        /// `IN_OPEN`
+        const OPEN = linux_raw_sys::general::IN_OPEN;
+
+        /// `IN_CLOSE`
+        const CLOSE = linux_raw_sys::general::IN_CLOSE;
+        /// `IN_MOVE`
+        const MOVE = linux_raw_sys::general::IN_MOVE;
+        /// `IN_ALL_EVENTS`
+        const ALL_EVENTS = linux_raw_sys::general::IN_ALL_EVENTS;
+
+        /// `IN_DONT_FOLLOW`
+        const DONT_FOLLOW = linux_raw_sys::general::IN_DONT_FOLLOW;
+        /// `IN_EXCL_UNLINK`
+        const EXCL_UNLINK = linux_raw_sys::general::IN_EXCL_UNLINK;
+        /// `IN_MASK_ADD`
+        const MASK_ADD = linux_raw_sys::general::IN_MASK_ADD;
+        /// `IN_MASK_CREATE`
+        const MASK_CREATE = linux_raw_sys::general::IN_MASK_CREATE;
+        /// `IN_ONESHOT`
+        const ONESHOT = linux_raw_sys::general::IN_ONESHOT;
+        /// `IN_ONLYDIR`
+        const ONLYDIR = linux_raw_sys::general::IN_ONLYDIR;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `inotify_init1(flags)`—Creates a new inotify object.
+///
+/// Use the [`CreateFlags::CLOEXEC`] flag to prevent the resulting file
+/// descriptor from being implicitly passed across `exec` boundaries.
+#[doc(alias = "inotify_init1")]
+#[inline]
+pub fn inotify_init(flags: CreateFlags) -> io::Result<OwnedFd> {
+    syscalls::inotify_init1(flags)
+}
+
+/// `inotify_add_watch(self, path, flags)`—Adds a watch to inotify.
+///
+/// This registers or updates a watch for the filesystem path `path` and
+/// returns a watch descriptor corresponding to this watch.
+///
+/// Note: Due to the existence of hardlinks, providing two different paths to
+/// this method may result in it returning the same watch descriptor. An
+/// application should keep track of this externally to avoid logic errors.
+#[inline]
+pub fn inotify_add_watch<P: crate::path::Arg>(
+    inot: BorrowedFd<'_>,
+    path: P,
+    flags: WatchFlags,
+) -> io::Result<i32> {
+    path.into_with_c_str(|path| syscalls::inotify_add_watch(inot, path, flags))
+}
+
+/// `inotify_rm_watch(self, wd)`—Removes a watch from this inotify.
+///
+/// The watch descriptor provided should have previously been returned by
+/// [`inotify_add_watch`] and not previously have been removed.
+#[doc(alias = "inotify_rm_watch")]
+#[inline]
+pub fn inotify_remove_watch(inot: BorrowedFd<'_>, wd: i32) -> io::Result<()> {
+    syscalls::inotify_rm_watch(inot, wd)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/fs/makedev.rs b/vendor/rustix/src/backend/linux_raw/fs/makedev.rs
new file mode 100644
index 0000000..284ba2f
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/fs/makedev.rs
@@ -0,0 +1,19 @@
+use crate::fs::Dev;
+
+#[inline]
+pub(crate) fn makedev(maj: u32, min: u32) -> Dev {
+    ((u64::from(maj) & 0xffff_f000_u64) << 32)
+        | ((u64::from(maj) & 0x0000_0fff_u64) << 8)
+        | ((u64::from(min) & 0xffff_ff00_u64) << 12)
+        | (u64::from(min) & 0x0000_00ff_u64)
+}
+
+#[inline]
+pub(crate) fn major(dev: Dev) -> u32 {
+    (((dev >> 31 >> 1) & 0xffff_f000) | ((dev >> 8) & 0x0000_0fff)) as u32
+}
+
+#[inline]
+pub(crate) fn minor(dev: Dev) -> u32 {
+    (((dev >> 12) & 0xffff_ff00) | (dev & 0x0000_00ff)) as u32
+}
diff --git a/vendor/rustix/src/backend/linux_raw/fs/mod.rs b/vendor/rustix/src/backend/linux_raw/fs/mod.rs
new file mode 100644
index 0000000..9f53c5d
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/fs/mod.rs
@@ -0,0 +1,13 @@
+#[cfg(feature = "alloc")]
+pub(crate) mod dir;
+pub mod inotify;
+pub(crate) mod makedev;
+pub(crate) mod syscalls;
+pub(crate) mod types;
+
+// TODO: Fix linux-raw-sys to define ioctl codes for sparc.
+#[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
+pub(crate) const EXT4_IOC_RESIZE_FS: u32 = 0x8008_6610;
+
+#[cfg(not(any(target_arch = "sparc", target_arch = "sparc64")))]
+pub(crate) use linux_raw_sys::ioctl::EXT4_IOC_RESIZE_FS;
diff --git a/vendor/rustix/src/backend/linux_raw/fs/syscalls.rs b/vendor/rustix/src/backend/linux_raw/fs/syscalls.rs
new file mode 100644
index 0000000..47d01df
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/fs/syscalls.rs
@@ -0,0 +1,1670 @@
+//! linux_raw syscalls supporting `rustix::fs`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code)]
+#![allow(clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+use crate::backend::conv::fs::oflags_for_open_how;
+#[cfg(any(
+    not(feature = "linux_4_11"),
+    target_arch = "aarch64",
+    target_arch = "riscv64",
+    target_arch = "mips",
+    target_arch = "mips32r6",
+))]
+use crate::backend::conv::zero;
+use crate::backend::conv::{
+    by_ref, c_int, c_uint, dev_t, opt_mut, pass_usize, raw_fd, ret, ret_c_int, ret_c_uint,
+    ret_infallible, ret_owned_fd, ret_usize, size_of, slice, slice_mut,
+};
+#[cfg(target_pointer_width = "64")]
+use crate::backend::conv::{loff_t, loff_t_from_u64, ret_u64};
+#[cfg(any(
+    target_arch = "aarch64",
+    target_arch = "riscv64",
+    target_arch = "mips64",
+    target_arch = "mips64r6",
+    target_pointer_width = "32",
+))]
+use crate::fd::AsFd;
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::ffi::CStr;
+#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+use crate::fs::CWD;
+use crate::fs::{
+    inotify, Access, Advice, AtFlags, FallocateFlags, FileType, FlockOperation, Gid, MemfdFlags,
+    Mode, OFlags, RenameFlags, ResolveFlags, SealFlags, SeekFrom, Stat, StatFs, StatVfs,
+    StatVfsMountFlags, StatxFlags, Timestamps, Uid, XattrFlags,
+};
+use crate::io;
+use core::mem::MaybeUninit;
+#[cfg(any(target_arch = "mips64", target_arch = "mips64r6"))]
+use linux_raw_sys::general::stat as linux_stat64;
+use linux_raw_sys::general::{
+    __kernel_fsid_t, open_how, statx, AT_EACCESS, AT_FDCWD, AT_REMOVEDIR, AT_SYMLINK_NOFOLLOW,
+    F_ADD_SEALS, F_GETFL, F_GET_SEALS, F_SETFL, SEEK_CUR, SEEK_DATA, SEEK_END, SEEK_HOLE, SEEK_SET,
+    STATX__RESERVED,
+};
+#[cfg(target_pointer_width = "32")]
+use {
+    crate::backend::conv::{hi, lo, slice_just_addr},
+    linux_raw_sys::general::stat64 as linux_stat64,
+    linux_raw_sys::general::timespec as __kernel_old_timespec,
+};
+
+#[inline]
+pub(crate) fn open(path: &CStr, flags: OFlags, mode: Mode) -> io::Result<OwnedFd> {
+    // Always enable support for large files.
+    let flags = flags | OFlags::from_bits_retain(c::O_LARGEFILE);
+
+    #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+    {
+        openat(CWD.as_fd(), path, flags, mode)
+    }
+    #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+    unsafe {
+        ret_owned_fd(syscall_readonly!(__NR_open, path, flags, mode))
+    }
+}
+
+#[inline]
+pub(crate) fn openat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    flags: OFlags,
+    mode: Mode,
+) -> io::Result<OwnedFd> {
+    // Always enable support for large files.
+    let flags = flags | OFlags::from_bits_retain(c::O_LARGEFILE);
+
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_openat, dirfd, path, flags, mode)) }
+}
+
+#[inline]
+pub(crate) fn openat2(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    mut flags: OFlags,
+    mode: Mode,
+    resolve: ResolveFlags,
+) -> io::Result<OwnedFd> {
+    // Enable support for large files, but not with `O_PATH` because
+    // `openat2` doesn't like those flags together.
+    if !flags.contains(OFlags::PATH) {
+        flags |= OFlags::from_bits_retain(c::O_LARGEFILE);
+    }
+
+    unsafe {
+        ret_owned_fd(syscall_readonly!(
+            __NR_openat2,
+            dirfd,
+            path,
+            by_ref(&open_how {
+                flags: oflags_for_open_how(flags),
+                mode: u64::from(mode.bits()),
+                resolve: resolve.bits(),
+            }),
+            size_of::<open_how, _>()
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn chmod(path: &CStr, mode: Mode) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fchmodat,
+            raw_fd(AT_FDCWD),
+            path,
+            mode
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn chmodat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    mode: Mode,
+    flags: AtFlags,
+) -> io::Result<()> {
+    if flags == AtFlags::SYMLINK_NOFOLLOW {
+        return Err(io::Errno::OPNOTSUPP);
+    }
+    if !flags.is_empty() {
+        return Err(io::Errno::INVAL);
+    }
+    unsafe { ret(syscall_readonly!(__NR_fchmodat, dirfd, path, mode)) }
+}
+
+#[inline]
+pub(crate) fn fchmod(fd: BorrowedFd<'_>, mode: Mode) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_fchmod, fd, mode)) }
+}
+
+#[inline]
+pub(crate) fn chownat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    owner: Option<Uid>,
+    group: Option<Gid>,
+    flags: AtFlags,
+) -> io::Result<()> {
+    unsafe {
+        let (ow, gr) = crate::ugid::translate_fchown_args(owner, group);
+        ret(syscall_readonly!(
+            __NR_fchownat,
+            dirfd,
+            path,
+            c_uint(ow),
+            c_uint(gr),
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn chown(path: &CStr, owner: Option<Uid>, group: Option<Gid>) -> io::Result<()> {
+    // Most architectures have a `chown` syscall.
+    #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+    unsafe {
+        let (ow, gr) = crate::ugid::translate_fchown_args(owner, group);
+        ret(syscall_readonly!(__NR_chown, path, c_uint(ow), c_uint(gr)))
+    }
+
+    // Aarch64 and RISC-V don't, so use `fchownat`.
+    #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+    unsafe {
+        let (ow, gr) = crate::ugid::translate_fchown_args(owner, group);
+        ret(syscall_readonly!(
+            __NR_fchownat,
+            raw_fd(AT_FDCWD),
+            path,
+            c_uint(ow),
+            c_uint(gr),
+            zero()
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn fchown(fd: BorrowedFd<'_>, owner: Option<Uid>, group: Option<Gid>) -> io::Result<()> {
+    unsafe {
+        let (ow, gr) = crate::ugid::translate_fchown_args(owner, group);
+        ret(syscall_readonly!(__NR_fchown, fd, c_uint(ow), c_uint(gr)))
+    }
+}
+
+#[inline]
+pub(crate) fn mknodat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    file_type: FileType,
+    mode: Mode,
+    dev: u64,
+) -> io::Result<()> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_mknodat,
+            dirfd,
+            path,
+            (mode, file_type),
+            dev_t(dev)?
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_mknodat,
+            dirfd,
+            path,
+            (mode, file_type),
+            dev_t(dev)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn seek(fd: BorrowedFd<'_>, pos: SeekFrom) -> io::Result<u64> {
+    let (whence, offset) = match pos {
+        SeekFrom::Start(pos) => {
+            let pos: u64 = pos;
+            // Silently cast; we'll get `EINVAL` if the value is negative.
+            (SEEK_SET, pos as i64)
+        }
+        SeekFrom::End(offset) => (SEEK_END, offset),
+        SeekFrom::Current(offset) => (SEEK_CUR, offset),
+        SeekFrom::Data(offset) => (SEEK_DATA, offset),
+        SeekFrom::Hole(offset) => (SEEK_HOLE, offset),
+    };
+    _seek(fd, offset, whence)
+}
+
+#[inline]
+pub(crate) fn _seek(fd: BorrowedFd<'_>, offset: i64, whence: c::c_uint) -> io::Result<u64> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        let mut result = MaybeUninit::<u64>::uninit();
+        ret(syscall!(
+            __NR__llseek,
+            fd,
+            // Don't use the hi/lo functions here because Linux's llseek
+            // takes its 64-bit argument differently from everything else.
+            pass_usize((offset >> 32) as usize),
+            pass_usize(offset as usize),
+            &mut result,
+            c_uint(whence)
+        ))?;
+        Ok(result.assume_init())
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret_u64(syscall_readonly!(
+            __NR_lseek,
+            fd,
+            loff_t(offset),
+            c_uint(whence)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn tell(fd: BorrowedFd<'_>) -> io::Result<u64> {
+    _seek(fd, 0, SEEK_CUR).map(|x| x as u64)
+}
+
+#[inline]
+pub(crate) fn ftruncate(fd: BorrowedFd<'_>, length: u64) -> io::Result<()> {
+    // <https://github.com/torvalds/linux/blob/fcadab740480e0e0e9fa9bd272acd409884d431a/arch/arm64/kernel/sys32.c#L81-L83>
+    #[cfg(all(
+        target_pointer_width = "32",
+        any(
+            target_arch = "arm",
+            target_arch = "mips",
+            target_arch = "mips32r6",
+            target_arch = "powerpc"
+        ),
+    ))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ftruncate64,
+            fd,
+            zero(),
+            hi(length),
+            lo(length)
+        ))
+    }
+    #[cfg(all(
+        target_pointer_width = "32",
+        not(any(
+            target_arch = "arm",
+            target_arch = "mips",
+            target_arch = "mips32r6",
+            target_arch = "powerpc"
+        )),
+    ))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ftruncate64,
+            fd,
+            hi(length),
+            lo(length)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ftruncate,
+            fd,
+            loff_t_from_u64(length)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn fallocate(
+    fd: BorrowedFd<'_>,
+    mode: FallocateFlags,
+    offset: u64,
+    len: u64,
+) -> io::Result<()> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fallocate,
+            fd,
+            mode,
+            hi(offset),
+            lo(offset),
+            hi(len),
+            lo(len)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fallocate,
+            fd,
+            mode,
+            loff_t_from_u64(offset),
+            loff_t_from_u64(len)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn fadvise(fd: BorrowedFd<'_>, pos: u64, len: u64, advice: Advice) -> io::Result<()> {
+    // On ARM, the arguments are reordered so that the len and pos argument
+    // pairs are aligned. And ARM has a custom syscall code for this.
+    #[cfg(target_arch = "arm")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_arm_fadvise64_64,
+            fd,
+            advice,
+            hi(pos),
+            lo(pos),
+            hi(len),
+            lo(len)
+        ))
+    }
+
+    // On powerpc, the arguments are reordered as on ARM.
+    #[cfg(target_arch = "powerpc")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fadvise64_64,
+            fd,
+            advice,
+            hi(pos),
+            lo(pos),
+            hi(len),
+            lo(len)
+        ))
+    }
+
+    // On mips, the arguments are not reordered, and padding is inserted
+    // instead to ensure alignment.
+    #[cfg(any(target_arch = "mips", target_arch = "mips32r6"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fadvise64,
+            fd,
+            zero(),
+            hi(pos),
+            lo(pos),
+            hi(len),
+            lo(len),
+            advice
+        ))
+    }
+
+    // For all other 32-bit architectures, use `fadvise64_64` so that we get a
+    // 64-bit length.
+    #[cfg(all(
+        target_pointer_width = "32",
+        not(any(
+            target_arch = "arm",
+            target_arch = "mips",
+            target_arch = "mips32r6",
+            target_arch = "powerpc"
+        )),
+    ))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fadvise64_64,
+            fd,
+            hi(pos),
+            lo(pos),
+            hi(len),
+            lo(len),
+            advice
+        ))
+    }
+
+    // On 64-bit architectures, use `fadvise64` which is sufficient.
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fadvise64,
+            fd,
+            loff_t_from_u64(pos),
+            loff_t_from_u64(len),
+            advice
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn fsync(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_fsync, fd)) }
+}
+
+#[inline]
+pub(crate) fn fdatasync(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_fdatasync, fd)) }
+}
+
+#[inline]
+pub(crate) fn flock(fd: BorrowedFd<'_>, operation: FlockOperation) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_flock,
+            fd,
+            c_uint(operation as c::c_uint)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn syncfs(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_syncfs, fd)) }
+}
+
+#[inline]
+pub(crate) fn sync() {
+    unsafe { ret_infallible(syscall_readonly!(__NR_sync)) }
+}
+
+#[inline]
+pub(crate) fn fstat(fd: BorrowedFd<'_>) -> io::Result<Stat> {
+    // 32-bit and mips64 Linux: `struct stat64` is not y2038 compatible; use
+    // `statx`.
+    //
+    // And, some old platforms don't support `statx`, and some fail with a
+    // confusing error code, so we call `crate::fs::statx` to handle that. If
+    // `statx` isn't available, fall back to the buggy system call.
+    #[cfg(any(
+        target_pointer_width = "32",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    ))]
+    {
+        match crate::fs::statx(fd, cstr!(""), AtFlags::EMPTY_PATH, StatxFlags::BASIC_STATS) {
+            Ok(x) => statx_to_stat(x),
+            Err(io::Errno::NOSYS) => fstat_old(fd),
+            Err(err) => Err(err),
+        }
+    }
+
+    #[cfg(all(
+        target_pointer_width = "64",
+        not(target_arch = "mips64"),
+        not(target_arch = "mips64r6")
+    ))]
+    unsafe {
+        let mut result = MaybeUninit::<Stat>::uninit();
+        ret(syscall!(__NR_fstat, fd, &mut result))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(any(
+    target_pointer_width = "32",
+    target_arch = "mips64",
+    target_arch = "mips64r6",
+))]
+fn fstat_old(fd: BorrowedFd<'_>) -> io::Result<Stat> {
+    let mut result = MaybeUninit::<linux_stat64>::uninit();
+
+    #[cfg(any(target_arch = "mips64", target_arch = "mips64r6"))]
+    unsafe {
+        ret(syscall!(__NR_fstat, fd, &mut result))?;
+        stat_to_stat(result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall!(__NR_fstat64, fd, &mut result))?;
+        stat_to_stat(result.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn stat(path: &CStr) -> io::Result<Stat> {
+    // See the comments in `fstat` about using `crate::fs::statx` here.
+    #[cfg(any(
+        target_pointer_width = "32",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    ))]
+    {
+        match crate::fs::statx(
+            crate::fs::CWD.as_fd(),
+            path,
+            AtFlags::empty(),
+            StatxFlags::BASIC_STATS,
+        ) {
+            Ok(x) => statx_to_stat(x),
+            Err(io::Errno::NOSYS) => stat_old(path),
+            Err(err) => Err(err),
+        }
+    }
+
+    #[cfg(all(
+        target_pointer_width = "64",
+        not(target_arch = "mips64"),
+        not(target_arch = "mips64r6"),
+    ))]
+    unsafe {
+        let mut result = MaybeUninit::<Stat>::uninit();
+        ret(syscall!(
+            __NR_newfstatat,
+            raw_fd(AT_FDCWD),
+            path,
+            &mut result,
+            c_uint(0)
+        ))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(any(
+    target_pointer_width = "32",
+    target_arch = "mips64",
+    target_arch = "mips64r6"
+))]
+fn stat_old(path: &CStr) -> io::Result<Stat> {
+    let mut result = MaybeUninit::<linux_stat64>::uninit();
+
+    #[cfg(any(target_arch = "mips64", target_arch = "mips64r6"))]
+    unsafe {
+        ret(syscall!(
+            __NR_newfstatat,
+            raw_fd(AT_FDCWD),
+            path,
+            &mut result,
+            c_uint(0)
+        ))?;
+        stat_to_stat(result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall!(
+            __NR_fstatat64,
+            raw_fd(AT_FDCWD),
+            path,
+            &mut result,
+            c_uint(0)
+        ))?;
+        stat_to_stat(result.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn statat(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<Stat> {
+    // See the comments in `fstat` about using `crate::fs::statx` here.
+    #[cfg(any(
+        target_pointer_width = "32",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    ))]
+    {
+        match crate::fs::statx(dirfd, path, flags, StatxFlags::BASIC_STATS) {
+            Ok(x) => statx_to_stat(x),
+            Err(io::Errno::NOSYS) => statat_old(dirfd, path, flags),
+            Err(err) => Err(err),
+        }
+    }
+
+    #[cfg(all(
+        target_pointer_width = "64",
+        not(target_arch = "mips64"),
+        not(target_arch = "mips64r6"),
+    ))]
+    unsafe {
+        let mut result = MaybeUninit::<Stat>::uninit();
+        ret(syscall!(__NR_newfstatat, dirfd, path, &mut result, flags))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(any(
+    target_pointer_width = "32",
+    target_arch = "mips64",
+    target_arch = "mips64r6"
+))]
+fn statat_old(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<Stat> {
+    let mut result = MaybeUninit::<linux_stat64>::uninit();
+
+    #[cfg(any(target_arch = "mips64", target_arch = "mips64r6"))]
+    unsafe {
+        ret(syscall!(__NR_newfstatat, dirfd, path, &mut result, flags))?;
+        stat_to_stat(result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall!(__NR_fstatat64, dirfd, path, &mut result, flags))?;
+        stat_to_stat(result.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn lstat(path: &CStr) -> io::Result<Stat> {
+    // See the comments in `fstat` about using `crate::fs::statx` here.
+    #[cfg(any(target_pointer_width = "32", target_arch = "mips64"))]
+    {
+        match crate::fs::statx(
+            crate::fs::CWD.as_fd(),
+            path,
+            AtFlags::SYMLINK_NOFOLLOW,
+            StatxFlags::BASIC_STATS,
+        ) {
+            Ok(x) => statx_to_stat(x),
+            Err(io::Errno::NOSYS) => lstat_old(path),
+            Err(err) => Err(err),
+        }
+    }
+
+    #[cfg(all(target_pointer_width = "64", not(target_arch = "mips64")))]
+    unsafe {
+        let mut result = MaybeUninit::<Stat>::uninit();
+        ret(syscall!(
+            __NR_newfstatat,
+            raw_fd(AT_FDCWD),
+            path,
+            &mut result,
+            c_uint(AT_SYMLINK_NOFOLLOW)
+        ))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(any(target_pointer_width = "32", target_arch = "mips64"))]
+fn lstat_old(path: &CStr) -> io::Result<Stat> {
+    let mut result = MaybeUninit::<linux_stat64>::uninit();
+
+    #[cfg(any(target_arch = "mips64", target_arch = "mips64r6"))]
+    unsafe {
+        ret(syscall!(
+            __NR_newfstatat,
+            raw_fd(AT_FDCWD),
+            path,
+            &mut result,
+            c_uint(AT_SYMLINK_NOFOLLOW)
+        ))?;
+        stat_to_stat(result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall!(
+            __NR_fstatat64,
+            raw_fd(AT_FDCWD),
+            path,
+            &mut result,
+            c_uint(AT_SYMLINK_NOFOLLOW)
+        ))?;
+        stat_to_stat(result.assume_init())
+    }
+}
+
+/// Convert from a Linux `statx` value to rustix's `Stat`.
+#[cfg(any(
+    target_pointer_width = "32",
+    target_arch = "mips64",
+    target_arch = "mips64r6"
+))]
+fn statx_to_stat(x: crate::fs::Statx) -> io::Result<Stat> {
+    Ok(Stat {
+        st_dev: crate::fs::makedev(x.stx_dev_major, x.stx_dev_minor),
+        st_mode: x.stx_mode.into(),
+        st_nlink: x.stx_nlink.into(),
+        st_uid: x.stx_uid.into(),
+        st_gid: x.stx_gid.into(),
+        st_rdev: crate::fs::makedev(x.stx_rdev_major, x.stx_rdev_minor),
+        st_size: x.stx_size.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_blksize: x.stx_blksize.into(),
+        st_blocks: x.stx_blocks.into(),
+        st_atime: x
+            .stx_atime
+            .tv_sec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_atime_nsec: x.stx_atime.tv_nsec.into(),
+        st_mtime: x
+            .stx_mtime
+            .tv_sec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_mtime_nsec: x.stx_mtime.tv_nsec.into(),
+        st_ctime: x
+            .stx_ctime
+            .tv_sec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_ctime_nsec: x.stx_ctime.tv_nsec.into(),
+        st_ino: x.stx_ino.into(),
+    })
+}
+
+/// Convert from a Linux `stat64` value to rustix's `Stat`.
+#[cfg(target_pointer_width = "32")]
+fn stat_to_stat(s64: linux_raw_sys::general::stat64) -> io::Result<Stat> {
+    Ok(Stat {
+        st_dev: s64.st_dev.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_mode: s64.st_mode.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_nlink: s64.st_nlink.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_uid: s64.st_uid.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_gid: s64.st_gid.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_rdev: s64.st_rdev.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_size: s64.st_size.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_blksize: s64.st_blksize.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_blocks: s64.st_blocks.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_atime: s64.st_atime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_atime_nsec: s64
+            .st_atime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_mtime: s64.st_mtime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_mtime_nsec: s64
+            .st_mtime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_ctime: s64.st_ctime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_ctime_nsec: s64
+            .st_ctime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_ino: s64.st_ino.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+    })
+}
+
+/// Convert from a Linux `stat` value to rustix's `Stat`.
+#[cfg(any(target_arch = "mips64", target_arch = "mips64r6"))]
+fn stat_to_stat(s: linux_raw_sys::general::stat) -> io::Result<Stat> {
+    Ok(Stat {
+        st_dev: s.st_dev.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_mode: s.st_mode.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_nlink: s.st_nlink.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_uid: s.st_uid.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_gid: s.st_gid.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_rdev: s.st_rdev.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_size: s.st_size.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_blksize: s.st_blksize.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_blocks: s.st_blocks.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_atime: s.st_atime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_atime_nsec: s
+            .st_atime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_mtime: s.st_mtime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_mtime_nsec: s
+            .st_mtime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_ctime: s.st_ctime.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+        st_ctime_nsec: s
+            .st_ctime_nsec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        st_ino: s.st_ino.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+    })
+}
+
+#[inline]
+pub(crate) fn statx(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    flags: AtFlags,
+    mask: StatxFlags,
+) -> io::Result<statx> {
+    // If a future Linux kernel adds more fields to `struct statx` and users
+    // passing flags unknown to rustix in `StatxFlags`, we could end up
+    // writing outside of the buffer. To prevent this possibility, we mask off
+    // any flags that we don't know about.
+    //
+    // This includes `STATX__RESERVED`, which has a value that we know, but
+    // which could take on arbitrary new meaning in the future. Linux currently
+    // rejects this flag with `EINVAL`, so we do the same.
+    //
+    // This doesn't rely on `STATX_ALL` because [it's deprecated] and already
+    // doesn't represent all the known flags.
+    //
+    // [it's deprecated]: https://patchwork.kernel.org/project/linux-fsdevel/patch/20200505095915.11275-7-mszeredi@redhat.com/
+    if (mask.bits() & STATX__RESERVED) == STATX__RESERVED {
+        return Err(io::Errno::INVAL);
+    }
+    let mask = mask & StatxFlags::all();
+
+    unsafe {
+        let mut statx_buf = MaybeUninit::<statx>::uninit();
+        ret(syscall!(
+            __NR_statx,
+            dirfd,
+            path,
+            flags,
+            mask,
+            &mut statx_buf
+        ))?;
+        Ok(statx_buf.assume_init())
+    }
+}
+
+#[cfg(not(feature = "linux_4_11"))]
+#[inline]
+pub(crate) fn is_statx_available() -> bool {
+    unsafe {
+        // Call `statx` with null pointers so that if it fails for any reason
+        // other than `EFAULT`, we know it's not supported. This can use
+        // "readonly" because we don't pass it a buffer to mutate.
+        matches!(
+            ret(syscall_readonly!(
+                __NR_statx,
+                raw_fd(AT_FDCWD),
+                zero(),
+                zero(),
+                zero(),
+                zero()
+            )),
+            Err(io::Errno::FAULT)
+        )
+    }
+}
+
+#[inline]
+pub(crate) fn fstatfs(fd: BorrowedFd<'_>) -> io::Result<StatFs> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        let mut result = MaybeUninit::<StatFs>::uninit();
+        ret(syscall!(
+            __NR_fstatfs64,
+            fd,
+            size_of::<StatFs, _>(),
+            &mut result
+        ))?;
+        Ok(result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        let mut result = MaybeUninit::<StatFs>::uninit();
+        ret(syscall!(__NR_fstatfs, fd, &mut result))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn fstatvfs(fd: BorrowedFd<'_>) -> io::Result<StatVfs> {
+    // Linux doesn't have an `fstatvfs` syscall; we have to do `fstatfs` and
+    // translate the fields as best we can.
+    let statfs = fstatfs(fd)?;
+
+    Ok(statfs_to_statvfs(statfs))
+}
+
+#[inline]
+pub(crate) fn statfs(path: &CStr) -> io::Result<StatFs> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        let mut result = MaybeUninit::<StatFs>::uninit();
+        ret(syscall!(
+            __NR_statfs64,
+            path,
+            size_of::<StatFs, _>(),
+            &mut result
+        ))?;
+        Ok(result.assume_init())
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        let mut result = MaybeUninit::<StatFs>::uninit();
+        ret(syscall!(__NR_statfs, path, &mut result))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn statvfs(path: &CStr) -> io::Result<StatVfs> {
+    // Linux doesn't have a `statvfs` syscall; we have to do `statfs` and
+    // translate the fields as best we can.
+    let statfs = statfs(path)?;
+
+    Ok(statfs_to_statvfs(statfs))
+}
+
+fn statfs_to_statvfs(statfs: StatFs) -> StatVfs {
+    let __kernel_fsid_t { val } = statfs.f_fsid;
+    let [f_fsid_val0, f_fsid_val1]: [i32; 2] = val;
+
+    StatVfs {
+        f_bsize: statfs.f_bsize as u64,
+        f_frsize: if statfs.f_frsize != 0 {
+            statfs.f_frsize
+        } else {
+            statfs.f_bsize
+        } as u64,
+        f_blocks: statfs.f_blocks as u64,
+        f_bfree: statfs.f_bfree as u64,
+        f_bavail: statfs.f_bavail as u64,
+        f_files: statfs.f_files as u64,
+        f_ffree: statfs.f_ffree as u64,
+        f_favail: statfs.f_ffree as u64,
+        f_fsid: u64::from(f_fsid_val0 as u32) | u64::from(f_fsid_val1 as u32) << 32,
+        f_flag: StatVfsMountFlags::from_bits_retain(statfs.f_flags as u64),
+        f_namemax: statfs.f_namelen as u64,
+    }
+}
+
+#[cfg(feature = "alloc")]
+#[inline]
+pub(crate) fn readlink(path: &CStr, buf: &mut [u8]) -> io::Result<usize> {
+    let (buf_addr_mut, buf_len) = slice_mut(buf);
+    unsafe {
+        ret_usize(syscall!(
+            __NR_readlinkat,
+            raw_fd(AT_FDCWD),
+            path,
+            buf_addr_mut,
+            buf_len
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn readlinkat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    buf: &mut [MaybeUninit<u8>],
+) -> io::Result<usize> {
+    let (buf_addr_mut, buf_len) = slice_mut(buf);
+    unsafe {
+        ret_usize(syscall!(
+            __NR_readlinkat,
+            dirfd,
+            path,
+            buf_addr_mut,
+            buf_len
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn fcntl_getfl(fd: BorrowedFd<'_>) -> io::Result<OFlags> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret_c_uint(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GETFL)))
+            .map(OFlags::from_bits_retain)
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret_c_uint(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETFL))).map(OFlags::from_bits_retain)
+    }
+}
+
+#[inline]
+pub(crate) fn fcntl_setfl(fd: BorrowedFd<'_>, flags: OFlags) -> io::Result<()> {
+    // Always enable support for large files.
+    let flags = flags | OFlags::from_bits_retain(c::O_LARGEFILE);
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_SETFL), flags))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(__NR_fcntl, fd, c_uint(F_SETFL), flags))
+    }
+}
+
+#[inline]
+pub(crate) fn fcntl_get_seals(fd: BorrowedFd<'_>) -> io::Result<SealFlags> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret_c_int(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GET_SEALS)))
+            .map(|seals| SealFlags::from_bits_retain(seals as u32))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret_c_int(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GET_SEALS)))
+            .map(|seals| SealFlags::from_bits_retain(seals as u32))
+    }
+}
+
+#[inline]
+pub(crate) fn fcntl_add_seals(fd: BorrowedFd<'_>, seals: SealFlags) -> io::Result<()> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fcntl64,
+            fd,
+            c_uint(F_ADD_SEALS),
+            seals
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fcntl,
+            fd,
+            c_uint(F_ADD_SEALS),
+            seals
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn fcntl_lock(fd: BorrowedFd<'_>, operation: FlockOperation) -> io::Result<()> {
+    #[cfg(target_pointer_width = "64")]
+    use linux_raw_sys::general::{flock, F_SETLK, F_SETLKW};
+    #[cfg(target_pointer_width = "32")]
+    use linux_raw_sys::general::{flock64 as flock, F_SETLK64 as F_SETLK, F_SETLKW64 as F_SETLKW};
+    use linux_raw_sys::general::{F_RDLCK, F_UNLCK, F_WRLCK};
+
+    let (cmd, l_type) = match operation {
+        FlockOperation::LockShared => (F_SETLKW, F_RDLCK),
+        FlockOperation::LockExclusive => (F_SETLKW, F_WRLCK),
+        FlockOperation::Unlock => (F_SETLKW, F_UNLCK),
+        FlockOperation::NonBlockingLockShared => (F_SETLK, F_RDLCK),
+        FlockOperation::NonBlockingLockExclusive => (F_SETLK, F_WRLCK),
+        FlockOperation::NonBlockingUnlock => (F_SETLK, F_UNLCK),
+    };
+
+    let lock = flock {
+        l_type: l_type as _,
+
+        // When `l_len` is zero, this locks all the bytes from
+        // `l_whence`/`l_start` to the end of the file, even as the
+        // file grows dynamically.
+        l_whence: SEEK_SET as _,
+        l_start: 0,
+        l_len: 0,
+
+        // Unused.
+        l_pid: 0,
+    };
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fcntl64,
+            fd,
+            c_uint(cmd),
+            by_ref(&lock)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fcntl,
+            fd,
+            c_uint(cmd),
+            by_ref(&lock)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn rename(old_path: &CStr, new_path: &CStr) -> io::Result<()> {
+    #[cfg(target_arch = "riscv64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_renameat2,
+            raw_fd(AT_FDCWD),
+            old_path,
+            raw_fd(AT_FDCWD),
+            new_path,
+            c_uint(0)
+        ))
+    }
+    #[cfg(not(target_arch = "riscv64"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_renameat,
+            raw_fd(AT_FDCWD),
+            old_path,
+            raw_fd(AT_FDCWD),
+            new_path
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn renameat(
+    old_dirfd: BorrowedFd<'_>,
+    old_path: &CStr,
+    new_dirfd: BorrowedFd<'_>,
+    new_path: &CStr,
+) -> io::Result<()> {
+    #[cfg(target_arch = "riscv64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_renameat2,
+            old_dirfd,
+            old_path,
+            new_dirfd,
+            new_path,
+            c_uint(0)
+        ))
+    }
+    #[cfg(not(target_arch = "riscv64"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_renameat,
+            old_dirfd,
+            old_path,
+            new_dirfd,
+            new_path
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn renameat2(
+    old_dirfd: BorrowedFd<'_>,
+    old_path: &CStr,
+    new_dirfd: BorrowedFd<'_>,
+    new_path: &CStr,
+    flags: RenameFlags,
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_renameat2,
+            old_dirfd,
+            old_path,
+            new_dirfd,
+            new_path,
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn unlink(path: &CStr) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_unlinkat,
+            raw_fd(AT_FDCWD),
+            path,
+            c_uint(0)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn unlinkat(dirfd: BorrowedFd<'_>, path: &CStr, flags: AtFlags) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_unlinkat, dirfd, path, flags)) }
+}
+
+#[inline]
+pub(crate) fn rmdir(path: &CStr) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_unlinkat,
+            raw_fd(AT_FDCWD),
+            path,
+            c_uint(AT_REMOVEDIR)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn link(old_path: &CStr, new_path: &CStr) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_linkat,
+            raw_fd(AT_FDCWD),
+            old_path,
+            raw_fd(AT_FDCWD),
+            new_path,
+            c_uint(0)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn linkat(
+    old_dirfd: BorrowedFd<'_>,
+    old_path: &CStr,
+    new_dirfd: BorrowedFd<'_>,
+    new_path: &CStr,
+    flags: AtFlags,
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_linkat,
+            old_dirfd,
+            old_path,
+            new_dirfd,
+            new_path,
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn symlink(old_path: &CStr, new_path: &CStr) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_symlinkat,
+            old_path,
+            raw_fd(AT_FDCWD),
+            new_path
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn symlinkat(old_path: &CStr, dirfd: BorrowedFd<'_>, new_path: &CStr) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_symlinkat, old_path, dirfd, new_path)) }
+}
+
+#[inline]
+pub(crate) fn mkdir(path: &CStr, mode: Mode) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_mkdirat,
+            raw_fd(AT_FDCWD),
+            path,
+            mode
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn mkdirat(dirfd: BorrowedFd<'_>, path: &CStr, mode: Mode) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_mkdirat, dirfd, path, mode)) }
+}
+
+#[cfg(feature = "alloc")]
+#[inline]
+pub(crate) fn getdents(fd: BorrowedFd<'_>, dirent: &mut [u8]) -> io::Result<usize> {
+    let (dirent_addr_mut, dirent_len) = slice_mut(dirent);
+
+    unsafe { ret_usize(syscall!(__NR_getdents64, fd, dirent_addr_mut, dirent_len)) }
+}
+
+#[inline]
+pub(crate) fn getdents_uninit(
+    fd: BorrowedFd<'_>,
+    dirent: &mut [MaybeUninit<u8>],
+) -> io::Result<usize> {
+    let (dirent_addr_mut, dirent_len) = slice_mut(dirent);
+
+    unsafe { ret_usize(syscall!(__NR_getdents64, fd, dirent_addr_mut, dirent_len)) }
+}
+
+#[inline]
+pub(crate) fn utimensat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    times: &Timestamps,
+    flags: AtFlags,
+) -> io::Result<()> {
+    _utimensat(dirfd, Some(path), times, flags)
+}
+
+#[inline]
+fn _utimensat(
+    dirfd: BorrowedFd<'_>,
+    path: Option<&CStr>,
+    times: &Timestamps,
+    flags: AtFlags,
+) -> io::Result<()> {
+    // `utimensat_time64` was introduced in Linux 5.1. The old `utimensat`
+    // syscall is not y2038-compatible on 32-bit architectures.
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        match ret(syscall_readonly!(
+            __NR_utimensat_time64,
+            dirfd,
+            path,
+            by_ref(times),
+            flags
+        )) {
+            Err(io::Errno::NOSYS) => _utimensat_old(dirfd, path, times, flags),
+            otherwise => otherwise,
+        }
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_utimensat,
+            dirfd,
+            path,
+            by_ref(times),
+            flags
+        ))
+    }
+}
+
+#[cfg(target_pointer_width = "32")]
+unsafe fn _utimensat_old(
+    dirfd: BorrowedFd<'_>,
+    path: Option<&CStr>,
+    times: &Timestamps,
+    flags: AtFlags,
+) -> io::Result<()> {
+    // See the comments in `rustix_clock_gettime_via_syscall` about
+    // emulation.
+    let old_times = [
+        __kernel_old_timespec {
+            tv_sec: times
+                .last_access
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: times
+                .last_access
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::INVAL)?,
+        },
+        __kernel_old_timespec {
+            tv_sec: times
+                .last_modification
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: times
+                .last_modification
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::INVAL)?,
+        },
+    ];
+    // The length of the array is fixed and not passed into the syscall.
+    let old_times_addr = slice_just_addr(&old_times);
+    ret(syscall_readonly!(
+        __NR_utimensat,
+        dirfd,
+        path,
+        old_times_addr,
+        flags
+    ))
+}
+
+#[inline]
+pub(crate) fn futimens(fd: BorrowedFd<'_>, times: &Timestamps) -> io::Result<()> {
+    _utimensat(fd, None, times, AtFlags::empty())
+}
+
+#[inline]
+pub(crate) fn access(path: &CStr, access: Access) -> io::Result<()> {
+    #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+    {
+        accessat_noflags(CWD.as_fd(), path, access)
+    }
+
+    #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+    unsafe {
+        ret(syscall_readonly!(__NR_access, path, access))
+    }
+}
+
+pub(crate) fn accessat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    access: Access,
+    flags: AtFlags,
+) -> io::Result<()> {
+    if !flags
+        .difference(AtFlags::EACCESS | AtFlags::SYMLINK_NOFOLLOW)
+        .is_empty()
+    {
+        return Err(io::Errno::INVAL);
+    }
+
+    // Linux's `faccessat` syscall doesn't have a flags argument, so if we have
+    // any flags, use the newer `faccessat2` introduced in Linux 5.8 which
+    // does. Unless we're on Android where using newer system calls can cause
+    // seccomp to abort the process.
+    #[cfg(not(target_os = "android"))]
+    if !flags.is_empty() {
+        unsafe {
+            match ret(syscall_readonly!(
+                __NR_faccessat2,
+                dirfd,
+                path,
+                access,
+                flags
+            )) {
+                Ok(()) => return Ok(()),
+                Err(io::Errno::NOSYS) => {}
+                Err(other) => return Err(other),
+            }
+        }
+    }
+
+    // Linux's `faccessat` doesn't have a flags parameter. If we have
+    // `AT_EACCESS` and we're not setuid or setgid, we can emulate it.
+    if flags.is_empty()
+        || (flags.bits() == AT_EACCESS
+            && crate::backend::ugid::syscalls::getuid()
+                == crate::backend::ugid::syscalls::geteuid()
+            && crate::backend::ugid::syscalls::getgid()
+                == crate::backend::ugid::syscalls::getegid())
+    {
+        return accessat_noflags(dirfd, path, access);
+    }
+
+    Err(io::Errno::NOSYS)
+}
+
+#[inline]
+fn accessat_noflags(dirfd: BorrowedFd<'_>, path: &CStr, access: Access) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_faccessat, dirfd, path, access)) }
+}
+
+#[inline]
+pub(crate) fn copy_file_range(
+    fd_in: BorrowedFd<'_>,
+    off_in: Option<&mut u64>,
+    fd_out: BorrowedFd<'_>,
+    off_out: Option<&mut u64>,
+    len: usize,
+) -> io::Result<usize> {
+    unsafe {
+        ret_usize(syscall!(
+            __NR_copy_file_range,
+            fd_in,
+            opt_mut(off_in),
+            fd_out,
+            opt_mut(off_out),
+            pass_usize(len),
+            c_uint(0)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn memfd_create(name: &CStr, flags: MemfdFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_memfd_create, name, flags)) }
+}
+
+#[inline]
+pub(crate) fn sendfile(
+    out_fd: BorrowedFd<'_>,
+    in_fd: BorrowedFd<'_>,
+    offset: Option<&mut u64>,
+    count: usize,
+) -> io::Result<usize> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret_usize(syscall!(
+            __NR_sendfile64,
+            out_fd,
+            in_fd,
+            opt_mut(offset),
+            pass_usize(count)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret_usize(syscall!(
+            __NR_sendfile,
+            out_fd,
+            in_fd,
+            opt_mut(offset),
+            pass_usize(count)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn inotify_init1(flags: inotify::CreateFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_inotify_init1, flags)) }
+}
+
+#[inline]
+pub(crate) fn inotify_add_watch(
+    infd: BorrowedFd<'_>,
+    path: &CStr,
+    flags: inotify::WatchFlags,
+) -> io::Result<i32> {
+    unsafe { ret_c_int(syscall_readonly!(__NR_inotify_add_watch, infd, path, flags)) }
+}
+
+#[inline]
+pub(crate) fn inotify_rm_watch(infd: BorrowedFd<'_>, wfd: i32) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_inotify_rm_watch, infd, c_int(wfd))) }
+}
+
+#[inline]
+pub(crate) fn getxattr(path: &CStr, name: &CStr, value: &mut [u8]) -> io::Result<usize> {
+    let (value_addr_mut, value_len) = slice_mut(value);
+    unsafe {
+        ret_usize(syscall!(
+            __NR_getxattr,
+            path,
+            name,
+            value_addr_mut,
+            value_len
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn lgetxattr(path: &CStr, name: &CStr, value: &mut [u8]) -> io::Result<usize> {
+    let (value_addr_mut, value_len) = slice_mut(value);
+    unsafe {
+        ret_usize(syscall!(
+            __NR_lgetxattr,
+            path,
+            name,
+            value_addr_mut,
+            value_len
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn fgetxattr(fd: BorrowedFd<'_>, name: &CStr, value: &mut [u8]) -> io::Result<usize> {
+    let (value_addr_mut, value_len) = slice_mut(value);
+    unsafe {
+        ret_usize(syscall!(
+            __NR_fgetxattr,
+            fd,
+            name,
+            value_addr_mut,
+            value_len
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn setxattr(
+    path: &CStr,
+    name: &CStr,
+    value: &[u8],
+    flags: XattrFlags,
+) -> io::Result<()> {
+    let (value_addr, value_len) = slice(value);
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_setxattr,
+            path,
+            name,
+            value_addr,
+            value_len,
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn lsetxattr(
+    path: &CStr,
+    name: &CStr,
+    value: &[u8],
+    flags: XattrFlags,
+) -> io::Result<()> {
+    let (value_addr, value_len) = slice(value);
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_lsetxattr,
+            path,
+            name,
+            value_addr,
+            value_len,
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn fsetxattr(
+    fd: BorrowedFd<'_>,
+    name: &CStr,
+    value: &[u8],
+    flags: XattrFlags,
+) -> io::Result<()> {
+    let (value_addr, value_len) = slice(value);
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsetxattr,
+            fd,
+            name,
+            value_addr,
+            value_len,
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn listxattr(path: &CStr, list: &mut [c::c_char]) -> io::Result<usize> {
+    let (list_addr_mut, list_len) = slice_mut(list);
+    unsafe { ret_usize(syscall!(__NR_listxattr, path, list_addr_mut, list_len)) }
+}
+
+#[inline]
+pub(crate) fn llistxattr(path: &CStr, list: &mut [c::c_char]) -> io::Result<usize> {
+    let (list_addr_mut, list_len) = slice_mut(list);
+    unsafe { ret_usize(syscall!(__NR_llistxattr, path, list_addr_mut, list_len)) }
+}
+
+#[inline]
+pub(crate) fn flistxattr(fd: BorrowedFd<'_>, list: &mut [c::c_char]) -> io::Result<usize> {
+    let (list_addr_mut, list_len) = slice_mut(list);
+    unsafe { ret_usize(syscall!(__NR_flistxattr, fd, list_addr_mut, list_len)) }
+}
+
+#[inline]
+pub(crate) fn removexattr(path: &CStr, name: &CStr) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_removexattr, path, name)) }
+}
+
+#[inline]
+pub(crate) fn lremovexattr(path: &CStr, name: &CStr) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_lremovexattr, path, name)) }
+}
+
+#[inline]
+pub(crate) fn fremovexattr(fd: BorrowedFd<'_>, name: &CStr) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_fremovexattr, fd, name)) }
+}
+
+#[test]
+fn test_sizes() {
+    assert_eq_size!(linux_raw_sys::general::__kernel_loff_t, u64);
+
+    // Assert that `Timestamps` has the expected layout.
+    assert_eq_size!([linux_raw_sys::general::__kernel_timespec; 2], Timestamps);
+}
diff --git a/vendor/rustix/src/backend/linux_raw/fs/types.rs b/vendor/rustix/src/backend/linux_raw/fs/types.rs
new file mode 100644
index 0000000..39823c4
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/fs/types.rs
@@ -0,0 +1,739 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `*_OK` constants for use with [`accessat`].
+    ///
+    /// [`accessat`]: fn.accessat.html
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct Access: c::c_uint {
+        /// `R_OK`
+        const READ_OK = linux_raw_sys::general::R_OK;
+
+        /// `W_OK`
+        const WRITE_OK = linux_raw_sys::general::W_OK;
+
+        /// `X_OK`
+        const EXEC_OK = linux_raw_sys::general::X_OK;
+
+        /// `F_OK`
+        const EXISTS = linux_raw_sys::general::F_OK;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `AT_*` constants for use with [`openat`], [`statat`], and other `*at`
+    /// functions.
+    ///
+    /// [`openat`]: crate::fs::openat
+    /// [`statat`]: crate::fs::statat
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct AtFlags: c::c_uint {
+        /// `AT_SYMLINK_NOFOLLOW`
+        const SYMLINK_NOFOLLOW = linux_raw_sys::general::AT_SYMLINK_NOFOLLOW;
+
+        /// `AT_EACCESS`
+        const EACCESS = linux_raw_sys::general::AT_EACCESS;
+
+        /// `AT_REMOVEDIR`
+        const REMOVEDIR = linux_raw_sys::general::AT_REMOVEDIR;
+
+        /// `AT_SYMLINK_FOLLOW`
+        const SYMLINK_FOLLOW = linux_raw_sys::general::AT_SYMLINK_FOLLOW;
+
+        /// `AT_NO_AUTOMOUNT`
+        const NO_AUTOMOUNT = linux_raw_sys::general::AT_NO_AUTOMOUNT;
+
+        /// `AT_EMPTY_PATH`
+        const EMPTY_PATH = linux_raw_sys::general::AT_EMPTY_PATH;
+
+        /// `AT_STATX_SYNC_AS_STAT`
+        const STATX_SYNC_AS_STAT = linux_raw_sys::general::AT_STATX_SYNC_AS_STAT;
+
+        /// `AT_STATX_FORCE_SYNC`
+        const STATX_FORCE_SYNC = linux_raw_sys::general::AT_STATX_FORCE_SYNC;
+
+        /// `AT_STATX_DONT_SYNC`
+        const STATX_DONT_SYNC = linux_raw_sys::general::AT_STATX_DONT_SYNC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `S_I*` constants for use with [`openat`], [`chmodat`], and [`fchmod`].
+    ///
+    /// [`openat`]: crate::fs::openat
+    /// [`chmodat`]: crate::fs::chmodat
+    /// [`fchmod`]: crate::fs::fchmod
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct Mode: RawMode {
+        /// `S_IRWXU`
+        const RWXU = linux_raw_sys::general::S_IRWXU;
+
+        /// `S_IRUSR`
+        const RUSR = linux_raw_sys::general::S_IRUSR;
+
+        /// `S_IWUSR`
+        const WUSR = linux_raw_sys::general::S_IWUSR;
+
+        /// `S_IXUSR`
+        const XUSR = linux_raw_sys::general::S_IXUSR;
+
+        /// `S_IRWXG`
+        const RWXG = linux_raw_sys::general::S_IRWXG;
+
+        /// `S_IRGRP`
+        const RGRP = linux_raw_sys::general::S_IRGRP;
+
+        /// `S_IWGRP`
+        const WGRP = linux_raw_sys::general::S_IWGRP;
+
+        /// `S_IXGRP`
+        const XGRP = linux_raw_sys::general::S_IXGRP;
+
+        /// `S_IRWXO`
+        const RWXO = linux_raw_sys::general::S_IRWXO;
+
+        /// `S_IROTH`
+        const ROTH = linux_raw_sys::general::S_IROTH;
+
+        /// `S_IWOTH`
+        const WOTH = linux_raw_sys::general::S_IWOTH;
+
+        /// `S_IXOTH`
+        const XOTH = linux_raw_sys::general::S_IXOTH;
+
+        /// `S_ISUID`
+        const SUID = linux_raw_sys::general::S_ISUID;
+
+        /// `S_ISGID`
+        const SGID = linux_raw_sys::general::S_ISGID;
+
+        /// `S_ISVTX`
+        const SVTX = linux_raw_sys::general::S_ISVTX;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+impl Mode {
+    /// Construct a `Mode` from the mode bits of the `st_mode` field of a
+    /// `Mode`.
+    #[inline]
+    pub const fn from_raw_mode(st_mode: RawMode) -> Self {
+        Self::from_bits_truncate(st_mode)
+    }
+
+    /// Construct an `st_mode` value from a `Mode`.
+    #[inline]
+    pub const fn as_raw_mode(self) -> RawMode {
+        self.bits()
+    }
+}
+
+impl From<RawMode> for Mode {
+    /// Support conversions from raw mode values to `Mode`.
+    ///
+    /// ```
+    /// use rustix::fs::{Mode, RawMode};
+    /// assert_eq!(Mode::from(0o700), Mode::RWXU);
+    /// ```
+    #[inline]
+    fn from(st_mode: RawMode) -> Self {
+        Self::from_raw_mode(st_mode)
+    }
+}
+
+impl From<Mode> for RawMode {
+    /// Support conversions from `Mode` to raw mode values.
+    ///
+    /// ```
+    /// use rustix::fs::{Mode, RawMode};
+    /// assert_eq!(RawMode::from(Mode::RWXU), 0o700);
+    /// ```
+    #[inline]
+    fn from(mode: Mode) -> Self {
+        mode.as_raw_mode()
+    }
+}
+
+bitflags! {
+    /// `O_*` constants for use with [`openat`].
+    ///
+    /// [`openat`]: crate::fs::openat
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct OFlags: c::c_uint {
+        /// `O_ACCMODE`
+        const ACCMODE = linux_raw_sys::general::O_ACCMODE;
+
+        /// Similar to `ACCMODE`, but just includes the read/write flags, and
+        /// no other flags.
+        ///
+        /// On some platforms, `PATH` may be included in `ACCMODE`, when
+        /// sometimes we really just want the read/write bits. Caution is
+        /// indicated, as the presence of `PATH` may mean that the read/write
+        /// bits don't have their usual meaning.
+        const RWMODE = linux_raw_sys::general::O_RDONLY |
+                       linux_raw_sys::general::O_WRONLY |
+                       linux_raw_sys::general::O_RDWR;
+
+        /// `O_APPEND`
+        const APPEND = linux_raw_sys::general::O_APPEND;
+
+        /// `O_CREAT`
+        #[doc(alias = "CREAT")]
+        const CREATE = linux_raw_sys::general::O_CREAT;
+
+        /// `O_DIRECTORY`
+        const DIRECTORY = linux_raw_sys::general::O_DIRECTORY;
+
+        /// `O_DSYNC`.
+        const DSYNC = linux_raw_sys::general::O_SYNC;
+
+        /// `O_EXCL`
+        const EXCL = linux_raw_sys::general::O_EXCL;
+
+        /// `O_FSYNC`.
+        const FSYNC = linux_raw_sys::general::O_SYNC;
+
+        /// `O_NOFOLLOW`
+        const NOFOLLOW = linux_raw_sys::general::O_NOFOLLOW;
+
+        /// `O_NONBLOCK`
+        const NONBLOCK = linux_raw_sys::general::O_NONBLOCK;
+
+        /// `O_RDONLY`
+        const RDONLY = linux_raw_sys::general::O_RDONLY;
+
+        /// `O_WRONLY`
+        const WRONLY = linux_raw_sys::general::O_WRONLY;
+
+        /// `O_RDWR`
+        ///
+        /// This is not equal to `RDONLY | WRONLY`. It's a distinct flag.
+        const RDWR = linux_raw_sys::general::O_RDWR;
+
+        /// `O_NOCTTY`
+        const NOCTTY = linux_raw_sys::general::O_NOCTTY;
+
+        /// `O_RSYNC`.
+        const RSYNC = linux_raw_sys::general::O_SYNC;
+
+        /// `O_SYNC`
+        const SYNC = linux_raw_sys::general::O_SYNC;
+
+        /// `O_TRUNC`
+        const TRUNC = linux_raw_sys::general::O_TRUNC;
+
+        /// `O_PATH`
+        const PATH = linux_raw_sys::general::O_PATH;
+
+        /// `O_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::O_CLOEXEC;
+
+        /// `O_TMPFILE`
+        const TMPFILE = linux_raw_sys::general::O_TMPFILE;
+
+        /// `O_NOATIME`
+        const NOATIME = linux_raw_sys::general::O_NOATIME;
+
+        /// `O_DIRECT`
+        const DIRECT = linux_raw_sys::general::O_DIRECT;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `RESOLVE_*` constants for use with [`openat2`].
+    ///
+    /// [`openat2`]: crate::fs::openat2
+    #[repr(transparent)]
+    #[derive(Default, Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct ResolveFlags: u64 {
+        /// `RESOLVE_NO_XDEV`
+        const NO_XDEV = linux_raw_sys::general::RESOLVE_NO_XDEV as u64;
+
+        /// `RESOLVE_NO_MAGICLINKS`
+        const NO_MAGICLINKS = linux_raw_sys::general::RESOLVE_NO_MAGICLINKS as u64;
+
+        /// `RESOLVE_NO_SYMLINKS`
+        const NO_SYMLINKS = linux_raw_sys::general::RESOLVE_NO_SYMLINKS as u64;
+
+        /// `RESOLVE_BENEATH`
+        const BENEATH = linux_raw_sys::general::RESOLVE_BENEATH as u64;
+
+        /// `RESOLVE_IN_ROOT`
+        const IN_ROOT = linux_raw_sys::general::RESOLVE_IN_ROOT as u64;
+
+        /// `RESOLVE_CACHED` (since Linux 5.12)
+        const CACHED = linux_raw_sys::general::RESOLVE_CACHED as u64;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `RENAME_*` constants for use with [`renameat_with`].
+    ///
+    /// [`renameat_with`]: crate::fs::renameat_with
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct RenameFlags: c::c_uint {
+        /// `RENAME_EXCHANGE`
+        const EXCHANGE = linux_raw_sys::general::RENAME_EXCHANGE;
+
+        /// `RENAME_NOREPLACE`
+        const NOREPLACE = linux_raw_sys::general::RENAME_NOREPLACE;
+
+        /// `RENAME_WHITEOUT`
+        const WHITEOUT = linux_raw_sys::general::RENAME_WHITEOUT;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `S_IF*` constants for use with [`mknodat`] and [`Stat`]'s `st_mode` field.
+///
+/// [`mknodat`]: crate::fs::mknodat
+/// [`Stat`]: crate::fs::Stat
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum FileType {
+    /// `S_IFREG`
+    RegularFile = linux_raw_sys::general::S_IFREG as isize,
+
+    /// `S_IFDIR`
+    Directory = linux_raw_sys::general::S_IFDIR as isize,
+
+    /// `S_IFLNK`
+    Symlink = linux_raw_sys::general::S_IFLNK as isize,
+
+    /// `S_IFIFO`
+    #[doc(alias = "IFO")]
+    Fifo = linux_raw_sys::general::S_IFIFO as isize,
+
+    /// `S_IFSOCK`
+    Socket = linux_raw_sys::general::S_IFSOCK as isize,
+
+    /// `S_IFCHR`
+    CharacterDevice = linux_raw_sys::general::S_IFCHR as isize,
+
+    /// `S_IFBLK`
+    BlockDevice = linux_raw_sys::general::S_IFBLK as isize,
+
+    /// An unknown filesystem object.
+    Unknown,
+}
+
+impl FileType {
+    /// Construct a `FileType` from the `S_IFMT` bits of the `st_mode` field of
+    /// a `Stat`.
+    #[inline]
+    pub const fn from_raw_mode(st_mode: RawMode) -> Self {
+        match st_mode & linux_raw_sys::general::S_IFMT {
+            linux_raw_sys::general::S_IFREG => Self::RegularFile,
+            linux_raw_sys::general::S_IFDIR => Self::Directory,
+            linux_raw_sys::general::S_IFLNK => Self::Symlink,
+            linux_raw_sys::general::S_IFIFO => Self::Fifo,
+            linux_raw_sys::general::S_IFSOCK => Self::Socket,
+            linux_raw_sys::general::S_IFCHR => Self::CharacterDevice,
+            linux_raw_sys::general::S_IFBLK => Self::BlockDevice,
+            _ => Self::Unknown,
+        }
+    }
+
+    /// Construct an `st_mode` value from a `FileType`.
+    #[inline]
+    pub const fn as_raw_mode(self) -> RawMode {
+        match self {
+            Self::RegularFile => linux_raw_sys::general::S_IFREG,
+            Self::Directory => linux_raw_sys::general::S_IFDIR,
+            Self::Symlink => linux_raw_sys::general::S_IFLNK,
+            Self::Fifo => linux_raw_sys::general::S_IFIFO,
+            Self::Socket => linux_raw_sys::general::S_IFSOCK,
+            Self::CharacterDevice => linux_raw_sys::general::S_IFCHR,
+            Self::BlockDevice => linux_raw_sys::general::S_IFBLK,
+            Self::Unknown => linux_raw_sys::general::S_IFMT,
+        }
+    }
+
+    /// Construct a `FileType` from the `d_type` field of a `c::dirent`.
+    #[inline]
+    pub(crate) const fn from_dirent_d_type(d_type: u8) -> Self {
+        match d_type as u32 {
+            linux_raw_sys::general::DT_REG => Self::RegularFile,
+            linux_raw_sys::general::DT_DIR => Self::Directory,
+            linux_raw_sys::general::DT_LNK => Self::Symlink,
+            linux_raw_sys::general::DT_SOCK => Self::Socket,
+            linux_raw_sys::general::DT_FIFO => Self::Fifo,
+            linux_raw_sys::general::DT_CHR => Self::CharacterDevice,
+            linux_raw_sys::general::DT_BLK => Self::BlockDevice,
+            // linux_raw_sys::general::DT_UNKNOWN |
+            _ => Self::Unknown,
+        }
+    }
+}
+
+/// `POSIX_FADV_*` constants for use with [`fadvise`].
+///
+/// [`fadvise`]: crate::fs::fadvise
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+#[repr(u32)]
+pub enum Advice {
+    /// `POSIX_FADV_NORMAL`
+    Normal = linux_raw_sys::general::POSIX_FADV_NORMAL,
+
+    /// `POSIX_FADV_SEQUENTIAL`
+    Sequential = linux_raw_sys::general::POSIX_FADV_SEQUENTIAL,
+
+    /// `POSIX_FADV_RANDOM`
+    Random = linux_raw_sys::general::POSIX_FADV_RANDOM,
+
+    /// `POSIX_FADV_NOREUSE`
+    NoReuse = linux_raw_sys::general::POSIX_FADV_NOREUSE,
+
+    /// `POSIX_FADV_WILLNEED`
+    WillNeed = linux_raw_sys::general::POSIX_FADV_WILLNEED,
+
+    /// `POSIX_FADV_DONTNEED`
+    DontNeed = linux_raw_sys::general::POSIX_FADV_DONTNEED,
+}
+
+bitflags! {
+    /// `MFD_*` constants for use with [`memfd_create`].
+    ///
+    /// [`memfd_create`]: crate::fs::memfd_create
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MemfdFlags: c::c_uint {
+        /// `MFD_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::MFD_CLOEXEC;
+
+        /// `MFD_ALLOW_SEALING`
+        const ALLOW_SEALING = linux_raw_sys::general::MFD_ALLOW_SEALING;
+
+        /// `MFD_HUGETLB` (since Linux 4.14)
+        const HUGETLB = linux_raw_sys::general::MFD_HUGETLB;
+
+        /// `MFD_HUGE_64KB`
+        const HUGE_64KB = linux_raw_sys::general::MFD_HUGE_64KB;
+        /// `MFD_HUGE_512JB`
+        const HUGE_512KB = linux_raw_sys::general::MFD_HUGE_512KB;
+        /// `MFD_HUGE_1MB`
+        const HUGE_1MB = linux_raw_sys::general::MFD_HUGE_1MB;
+        /// `MFD_HUGE_2MB`
+        const HUGE_2MB = linux_raw_sys::general::MFD_HUGE_2MB;
+        /// `MFD_HUGE_8MB`
+        const HUGE_8MB = linux_raw_sys::general::MFD_HUGE_8MB;
+        /// `MFD_HUGE_16MB`
+        const HUGE_16MB = linux_raw_sys::general::MFD_HUGE_16MB;
+        /// `MFD_HUGE_32MB`
+        const HUGE_32MB = linux_raw_sys::general::MFD_HUGE_32MB;
+        /// `MFD_HUGE_256MB`
+        const HUGE_256MB = linux_raw_sys::general::MFD_HUGE_256MB;
+        /// `MFD_HUGE_512MB`
+        const HUGE_512MB = linux_raw_sys::general::MFD_HUGE_512MB;
+        /// `MFD_HUGE_1GB`
+        const HUGE_1GB = linux_raw_sys::general::MFD_HUGE_1GB;
+        /// `MFD_HUGE_2GB`
+        const HUGE_2GB = linux_raw_sys::general::MFD_HUGE_2GB;
+        /// `MFD_HUGE_16GB`
+        const HUGE_16GB = linux_raw_sys::general::MFD_HUGE_16GB;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `F_SEAL_*` constants for use with [`fcntl_add_seals`] and
+    /// [`fcntl_get_seals`].
+    ///
+    /// [`fcntl_add_seals`]: crate::fs::fcntl_add_seals
+    /// [`fcntl_get_seals`]: crate::fs::fcntl_get_seals
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct SealFlags: u32 {
+        /// `F_SEAL_SEAL`.
+        const SEAL = linux_raw_sys::general::F_SEAL_SEAL;
+        /// `F_SEAL_SHRINK`.
+        const SHRINK = linux_raw_sys::general::F_SEAL_SHRINK;
+        /// `F_SEAL_GROW`.
+        const GROW = linux_raw_sys::general::F_SEAL_GROW;
+        /// `F_SEAL_WRITE`.
+        const WRITE = linux_raw_sys::general::F_SEAL_WRITE;
+        /// `F_SEAL_FUTURE_WRITE` (since Linux 5.1)
+        const FUTURE_WRITE = linux_raw_sys::general::F_SEAL_FUTURE_WRITE;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `STATX_*` constants for use with [`statx`].
+    ///
+    /// [`statx`]: crate::fs::statx
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct StatxFlags: u32 {
+        /// `STATX_TYPE`
+        const TYPE = linux_raw_sys::general::STATX_TYPE;
+
+        /// `STATX_MODE`
+        const MODE = linux_raw_sys::general::STATX_MODE;
+
+        /// `STATX_NLINK`
+        const NLINK = linux_raw_sys::general::STATX_NLINK;
+
+        /// `STATX_UID`
+        const UID = linux_raw_sys::general::STATX_UID;
+
+        /// `STATX_GID`
+        const GID = linux_raw_sys::general::STATX_GID;
+
+        /// `STATX_ATIME`
+        const ATIME = linux_raw_sys::general::STATX_ATIME;
+
+        /// `STATX_MTIME`
+        const MTIME = linux_raw_sys::general::STATX_MTIME;
+
+        /// `STATX_CTIME`
+        const CTIME = linux_raw_sys::general::STATX_CTIME;
+
+        /// `STATX_INO`
+        const INO = linux_raw_sys::general::STATX_INO;
+
+        /// `STATX_SIZE`
+        const SIZE = linux_raw_sys::general::STATX_SIZE;
+
+        /// `STATX_BLOCKS`
+        const BLOCKS = linux_raw_sys::general::STATX_BLOCKS;
+
+        /// `STATX_BASIC_STATS`
+        const BASIC_STATS = linux_raw_sys::general::STATX_BASIC_STATS;
+
+        /// `STATX_BTIME`
+        const BTIME = linux_raw_sys::general::STATX_BTIME;
+
+        /// `STATX_MNT_ID` (since Linux 5.8)
+        const MNT_ID = linux_raw_sys::general::STATX_MNT_ID;
+
+        /// `STATX_DIOALIGN` (since Linux 6.1)
+        const DIOALIGN = linux_raw_sys::general::STATX_DIOALIGN;
+
+        /// `STATX_ALL`
+        const ALL = linux_raw_sys::general::STATX_ALL;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `FALLOC_FL_*` constants for use with [`fallocate`].
+    ///
+    /// [`fallocate`]: crate::fs::fallocate
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FallocateFlags: u32 {
+        /// `FALLOC_FL_KEEP_SIZE`
+        const KEEP_SIZE = linux_raw_sys::general::FALLOC_FL_KEEP_SIZE;
+        /// `FALLOC_FL_PUNCH_HOLE`
+        const PUNCH_HOLE = linux_raw_sys::general::FALLOC_FL_PUNCH_HOLE;
+        /// `FALLOC_FL_NO_HIDE_STALE`
+        const NO_HIDE_STALE = linux_raw_sys::general::FALLOC_FL_NO_HIDE_STALE;
+        /// `FALLOC_FL_COLLAPSE_RANGE`
+        const COLLAPSE_RANGE = linux_raw_sys::general::FALLOC_FL_COLLAPSE_RANGE;
+        /// `FALLOC_FL_ZERO_RANGE`
+        const ZERO_RANGE = linux_raw_sys::general::FALLOC_FL_ZERO_RANGE;
+        /// `FALLOC_FL_INSERT_RANGE`
+        const INSERT_RANGE = linux_raw_sys::general::FALLOC_FL_INSERT_RANGE;
+        /// `FALLOC_FL_UNSHARE_RANGE`
+        const UNSHARE_RANGE = linux_raw_sys::general::FALLOC_FL_UNSHARE_RANGE;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `ST_*` constants for use with [`StatVfs`].
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct StatVfsMountFlags: u64 {
+        /// `ST_MANDLOCK`
+        const MANDLOCK = linux_raw_sys::general::MS_MANDLOCK as u64;
+
+        /// `ST_NOATIME`
+        const NOATIME = linux_raw_sys::general::MS_NOATIME as u64;
+
+        /// `ST_NODEV`
+        const NODEV = linux_raw_sys::general::MS_NODEV as u64;
+
+        /// `ST_NODIRATIME`
+        const NODIRATIME = linux_raw_sys::general::MS_NODIRATIME as u64;
+
+        /// `ST_NOEXEC`
+        const NOEXEC = linux_raw_sys::general::MS_NOEXEC as u64;
+
+        /// `ST_NOSUID`
+        const NOSUID = linux_raw_sys::general::MS_NOSUID as u64;
+
+        /// `ST_RDONLY`
+        const RDONLY = linux_raw_sys::general::MS_RDONLY as u64;
+
+        /// `ST_RELATIME`
+        const RELATIME = linux_raw_sys::general::MS_RELATIME as u64;
+
+        /// `ST_SYNCHRONOUS`
+        const SYNCHRONOUS = linux_raw_sys::general::MS_SYNCHRONOUS as u64;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `LOCK_*` constants for use with [`flock`] and [`fcntl_lock`].
+///
+/// [`flock`]: crate::fs::flock
+/// [`fcntl_lock`]: crate::fs::fcntl_lock
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[repr(u32)]
+pub enum FlockOperation {
+    /// `LOCK_SH`
+    LockShared = linux_raw_sys::general::LOCK_SH,
+    /// `LOCK_EX`
+    LockExclusive = linux_raw_sys::general::LOCK_EX,
+    /// `LOCK_UN`
+    Unlock = linux_raw_sys::general::LOCK_UN,
+    /// `LOCK_SH | LOCK_NB`
+    NonBlockingLockShared = linux_raw_sys::general::LOCK_SH | linux_raw_sys::general::LOCK_NB,
+    /// `LOCK_EX | LOCK_NB`
+    NonBlockingLockExclusive = linux_raw_sys::general::LOCK_EX | linux_raw_sys::general::LOCK_NB,
+    /// `LOCK_UN | LOCK_NB`
+    NonBlockingUnlock = linux_raw_sys::general::LOCK_UN | linux_raw_sys::general::LOCK_NB,
+}
+
+/// `struct stat` for use with [`statat`] and [`fstat`].
+///
+/// [`statat`]: crate::fs::statat
+/// [`fstat`]: crate::fs::fstat
+// On 32-bit, and mips64, Linux's `struct stat64` has a 32-bit `st_mtime` and
+// friends, so we use our own struct, populated from `statx` where possible, to
+// avoid the y2038 bug.
+#[cfg(any(
+    target_pointer_width = "32",
+    target_arch = "mips64",
+    target_arch = "mips64r6"
+))]
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+#[allow(missing_docs)]
+pub struct Stat {
+    pub st_dev: u64,
+    pub st_mode: u32,
+    pub st_nlink: u32,
+    pub st_uid: u32,
+    pub st_gid: u32,
+    pub st_rdev: u64,
+    pub st_size: i64,
+    pub st_blksize: u32,
+    pub st_blocks: u64,
+    pub st_atime: u64,
+    pub st_atime_nsec: u32,
+    pub st_mtime: u64,
+    pub st_mtime_nsec: u32,
+    pub st_ctime: u64,
+    pub st_ctime_nsec: u32,
+    pub st_ino: u64,
+}
+
+/// `struct stat` for use with [`statat`] and [`fstat`].
+///
+/// [`statat`]: crate::fs::statat
+/// [`fstat`]: crate::fs::fstat
+#[cfg(all(
+    target_pointer_width = "64",
+    not(target_arch = "mips64"),
+    not(target_arch = "mips64r6")
+))]
+pub type Stat = linux_raw_sys::general::stat;
+
+/// `struct statfs` for use with [`statfs`] and [`fstatfs`].
+///
+/// [`statfs`]: crate::fs::statfs
+/// [`fstatfs`]: crate::fs::fstatfs
+#[allow(clippy::module_name_repetitions)]
+pub type StatFs = linux_raw_sys::general::statfs64;
+
+/// `struct statvfs` for use with [`statvfs`] and [`fstatvfs`].
+///
+/// [`statvfs`]: crate::fs::statvfs
+/// [`fstatvfs`]: crate::fs::fstatvfs
+#[allow(missing_docs)]
+pub struct StatVfs {
+    pub f_bsize: u64,
+    pub f_frsize: u64,
+    pub f_blocks: u64,
+    pub f_bfree: u64,
+    pub f_bavail: u64,
+    pub f_files: u64,
+    pub f_ffree: u64,
+    pub f_favail: u64,
+    pub f_fsid: u64,
+    pub f_flag: StatVfsMountFlags,
+    pub f_namemax: u64,
+}
+
+/// `struct statx` for use with [`statx`].
+///
+/// [`statx`]: crate::fs::statx
+pub type Statx = linux_raw_sys::general::statx;
+
+/// `struct statx_timestamp` for use with [`Statx`].
+pub type StatxTimestamp = linux_raw_sys::general::statx_timestamp;
+
+/// `mode_t`
+#[cfg(not(any(
+    target_arch = "x86",
+    target_arch = "sparc",
+    target_arch = "avr",
+    target_arch = "arm",
+)))]
+pub type RawMode = linux_raw_sys::general::__kernel_mode_t;
+
+/// `mode_t`
+#[cfg(any(
+    target_arch = "x86",
+    target_arch = "sparc",
+    target_arch = "avr",
+    target_arch = "arm",
+))]
+// Don't use `__kernel_mode_t` since it's `u16` which differs from `st_size`.
+pub type RawMode = c::c_uint;
+
+/// `dev_t`
+// Within the kernel the dev_t is 32-bit, but userspace uses a 64-bit field.
+pub type Dev = u64;
+
+/// `__fsword_t`
+#[cfg(not(any(target_arch = "mips64", target_arch = "mips64r6")))]
+pub type FsWord = linux_raw_sys::general::__fsword_t;
+
+/// `__fsword_t`
+#[cfg(any(target_arch = "mips64", target_arch = "mips64r6"))]
+pub type FsWord = i64;
diff --git a/vendor/rustix/src/backend/linux_raw/io/errno.rs b/vendor/rustix/src/backend/linux_raw/io/errno.rs
new file mode 100644
index 0000000..bc40e9a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/io/errno.rs
@@ -0,0 +1,553 @@
+//! The `rustix` `Errno` type.
+//!
+//! This type holds an OS error code, which conceptually corresponds to an
+//! `errno` value.
+//!
+//! # Safety
+//!
+//! Linux uses error codes in `-4095..0`; we use rustc attributes to describe
+//! this restricted range of values.
+#![allow(unsafe_code)]
+#![cfg_attr(not(rustc_attrs), allow(unused_unsafe))]
+
+use crate::backend::c;
+use crate::backend::fd::RawFd;
+use crate::backend::reg::{RetNumber, RetReg};
+use crate::io;
+use linux_raw_sys::errno;
+
+/// `errno`—An error code.
+///
+/// The error type for `rustix` APIs. This is similar to [`std::io::Error`],
+/// but only holds an OS error code, and no extra error value.
+///
+/// # References
+///  - [POSIX]
+///  - [Linux]
+///  - [Winsock]
+///  - [FreeBSD]
+///  - [NetBSD]
+///  - [OpenBSD]
+///  - [DragonFly BSD]
+///  - [illumos]
+///  - [glibc]
+///
+/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/errno.html
+/// [Linux]: https://man7.org/linux/man-pages/man3/errno.3.html
+/// [Winsock]: https://learn.microsoft.com/en-us/windows/win32/winsock/windows-sockets-error-codes-2
+/// [FreeBSD]: https://man.freebsd.org/cgi/man.cgi?errno
+/// [NetBSD]: https://man.netbsd.org/errno.2
+/// [OpenBSD]: https://man.openbsd.org/errno.2
+/// [DragonFly BSD]: https://man.dragonflybsd.org/?command=errno&section=2
+/// [illumos]: https://illumos.org/man/3C/errno
+/// [glibc]: https://www.gnu.org/software/libc/manual/html_node/Error-Codes.html
+/// [`std::io::Error`]: Result
+#[repr(transparent)]
+#[doc(alias = "errno")]
+#[derive(Eq, PartialEq, Hash, Copy, Clone)]
+// Linux returns negated error codes, and we leave them in negated form, so
+// error codes are in `-4095..0`.
+#[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_start(0xf001))]
+#[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_end(0xffff))]
+pub struct Errno(u16);
+
+impl Errno {
+    /// Extract an `Errno` value from a `std::io::Error`.
+    ///
+    /// This isn't a `From` conversion because it's expected to be relatively
+    /// uncommon.
+    #[cfg(feature = "std")]
+    #[inline]
+    pub fn from_io_error(io_err: &std::io::Error) -> Option<Self> {
+        io_err.raw_os_error().and_then(|raw| {
+            // `std::io::Error` could theoretically have arbitrary OS error
+            // values, so check that they're in Linux's range.
+            if (1..4096).contains(&raw) {
+                Some(Self::from_errno(raw as u32))
+            } else {
+                None
+            }
+        })
+    }
+
+    /// Extract the raw OS error number from this error.
+    #[inline]
+    pub const fn raw_os_error(self) -> i32 {
+        (self.0 as i16 as i32).wrapping_neg()
+    }
+
+    /// Construct an `Errno` from a raw OS error number.
+    #[inline]
+    pub const fn from_raw_os_error(raw: i32) -> Self {
+        Self::from_errno(raw as u32)
+    }
+
+    /// Convert from a C `errno` value (which is positive) to an `Errno`.
+    const fn from_errno(raw: u32) -> Self {
+        // We store error values in negated form, so that we don't have to
+        // negate them after every syscall.
+        let encoded = raw.wrapping_neg() as u16;
+
+        // TODO: Use Range::contains, once that's `const`.
+        assert!(encoded >= 0xf001);
+
+        // SAFETY: Linux syscalls return negated error values in the range
+        // `-4095..0`, which we just asserted.
+        unsafe { Self(encoded) }
+    }
+}
+
+/// Check for an error from the result of a syscall which encodes a
+/// `c::c_int` on success.
+#[inline]
+pub(in crate::backend) fn try_decode_c_int<Num: RetNumber>(
+    raw: RetReg<Num>,
+) -> io::Result<c::c_int> {
+    if raw.is_in_range(-4095..0) {
+        // SAFETY: `raw` must be in `-4095..0`, and we just checked that raw is
+        // in that range.
+        return Err(unsafe { Errno(raw.decode_error_code()) });
+    }
+
+    Ok(raw.decode_c_int())
+}
+
+/// Check for an error from the result of a syscall which encodes a
+/// `c::c_uint` on success.
+#[inline]
+pub(in crate::backend) fn try_decode_c_uint<Num: RetNumber>(
+    raw: RetReg<Num>,
+) -> io::Result<c::c_uint> {
+    if raw.is_in_range(-4095..0) {
+        // SAFETY: `raw` must be in `-4095..0`, and we just checked that raw is
+        // in that range.
+        return Err(unsafe { Errno(raw.decode_error_code()) });
+    }
+
+    Ok(raw.decode_c_uint())
+}
+
+/// Check for an error from the result of a syscall which encodes a `usize` on
+/// success.
+#[inline]
+pub(in crate::backend) fn try_decode_usize<Num: RetNumber>(raw: RetReg<Num>) -> io::Result<usize> {
+    if raw.is_in_range(-4095..0) {
+        // SAFETY: `raw` must be in `-4095..0`, and we just checked that raw is
+        // in that range.
+        return Err(unsafe { Errno(raw.decode_error_code()) });
+    }
+
+    Ok(raw.decode_usize())
+}
+
+/// Check for an error from the result of a syscall which encodes a
+/// `*mut c_void` on success.
+#[inline]
+pub(in crate::backend) fn try_decode_void_star<Num: RetNumber>(
+    raw: RetReg<Num>,
+) -> io::Result<*mut c::c_void> {
+    if raw.is_in_range(-4095..0) {
+        // SAFETY: `raw` must be in `-4095..0`, and we just checked that raw is
+        // in that range.
+        return Err(unsafe { Errno(raw.decode_error_code()) });
+    }
+
+    Ok(raw.decode_void_star())
+}
+
+/// Check for an error from the result of a syscall which encodes a
+/// `u64` on success.
+#[cfg(target_pointer_width = "64")]
+#[inline]
+pub(in crate::backend) fn try_decode_u64<Num: RetNumber>(raw: RetReg<Num>) -> io::Result<u64> {
+    if raw.is_in_range(-4095..0) {
+        // SAFETY: `raw` must be in `-4095..0`, and we just checked that raw is
+        // in that range.
+        return Err(unsafe { Errno(raw.decode_error_code()) });
+    }
+
+    Ok(raw.decode_u64())
+}
+
+/// Check for an error from the result of a syscall which encodes a file
+/// descriptor on success.
+///
+/// # Safety
+///
+/// This must only be used with syscalls which return file descriptors on
+/// success.
+#[inline]
+pub(in crate::backend) unsafe fn try_decode_raw_fd<Num: RetNumber>(
+    raw: RetReg<Num>,
+) -> io::Result<RawFd> {
+    // Instead of using `check_result` here, we just check for negative, since
+    // this function is only used for system calls which return file
+    // descriptors, and this produces smaller code.
+    if raw.is_negative() {
+        debug_assert!(raw.is_in_range(-4095..0));
+
+        // Tell the optimizer that we know the value is in the error range.
+        // This helps it avoid unnecessary integer conversions.
+        #[cfg(core_intrinsics)]
+        {
+            core::intrinsics::assume(raw.is_in_range(-4095..0));
+        }
+
+        return Err(Errno(raw.decode_error_code()));
+    }
+
+    Ok(raw.decode_raw_fd())
+}
+
+/// Check for an error from the result of a syscall which encodes no value on
+/// success. On success, return the unconsumed `raw` value.
+///
+/// # Safety
+///
+/// This must only be used with syscalls which return no value on success.
+#[inline]
+pub(in crate::backend) unsafe fn try_decode_void<Num: RetNumber>(
+    raw: RetReg<Num>,
+) -> io::Result<()> {
+    // Instead of using `check_result` here, we just check for zero, since this
+    // function is only used for system calls which have no other return value,
+    // and this produces smaller code.
+    if raw.is_nonzero() {
+        debug_assert!(raw.is_in_range(-4095..0));
+
+        // Tell the optimizer that we know the value is in the error range.
+        // This helps it avoid unnecessary integer conversions.
+        #[cfg(core_intrinsics)]
+        {
+            core::intrinsics::assume(raw.is_in_range(-4095..0));
+        }
+
+        return Err(Errno(raw.decode_error_code()));
+    }
+
+    raw.decode_void();
+
+    Ok(())
+}
+
+/// Check for an error from the result of a syscall which does not return on
+/// success. On success, return the unconsumed `raw` value.
+///
+/// # Safety
+///
+/// This must only be used with syscalls which do not return on success.
+#[cfg(any(feature = "event", feature = "runtime"))]
+#[inline]
+pub(in crate::backend) unsafe fn try_decode_error<Num: RetNumber>(raw: RetReg<Num>) -> io::Errno {
+    debug_assert!(raw.is_in_range(-4095..0));
+
+    // Tell the optimizer that we know the value is in the error range.
+    // This helps it avoid unnecessary integer conversions.
+    #[cfg(core_intrinsics)]
+    {
+        core::intrinsics::assume(raw.is_in_range(-4095..0));
+    }
+
+    Errno(raw.decode_error_code())
+}
+
+/// Return the contained `usize` value.
+#[cfg(not(debug_assertions))]
+#[inline]
+pub(in crate::backend) fn decode_usize_infallible<Num: RetNumber>(raw: RetReg<Num>) -> usize {
+    raw.decode_usize()
+}
+
+/// Return the contained `c_int` value.
+#[cfg(not(debug_assertions))]
+#[inline]
+pub(in crate::backend) fn decode_c_int_infallible<Num: RetNumber>(raw: RetReg<Num>) -> c::c_int {
+    raw.decode_c_int()
+}
+
+/// Return the contained `c_uint` value.
+#[cfg(not(debug_assertions))]
+#[inline]
+pub(in crate::backend) fn decode_c_uint_infallible<Num: RetNumber>(raw: RetReg<Num>) -> c::c_uint {
+    raw.decode_c_uint()
+}
+
+impl Errno {
+    /// `EACCES`
+    #[doc(alias = "ACCES")]
+    pub const ACCESS: Self = Self::from_errno(errno::EACCES);
+    /// `EADDRINUSE`
+    pub const ADDRINUSE: Self = Self::from_errno(errno::EADDRINUSE);
+    /// `EADDRNOTAVAIL`
+    pub const ADDRNOTAVAIL: Self = Self::from_errno(errno::EADDRNOTAVAIL);
+    /// `EADV`
+    pub const ADV: Self = Self::from_errno(errno::EADV);
+    /// `EAFNOSUPPORT`
+    pub const AFNOSUPPORT: Self = Self::from_errno(errno::EAFNOSUPPORT);
+    /// `EAGAIN`
+    pub const AGAIN: Self = Self::from_errno(errno::EAGAIN);
+    /// `EALREADY`
+    pub const ALREADY: Self = Self::from_errno(errno::EALREADY);
+    /// `EBADE`
+    pub const BADE: Self = Self::from_errno(errno::EBADE);
+    /// `EBADF`
+    pub const BADF: Self = Self::from_errno(errno::EBADF);
+    /// `EBADFD`
+    pub const BADFD: Self = Self::from_errno(errno::EBADFD);
+    /// `EBADMSG`
+    pub const BADMSG: Self = Self::from_errno(errno::EBADMSG);
+    /// `EBADR`
+    pub const BADR: Self = Self::from_errno(errno::EBADR);
+    /// `EBADRQC`
+    pub const BADRQC: Self = Self::from_errno(errno::EBADRQC);
+    /// `EBADSLT`
+    pub const BADSLT: Self = Self::from_errno(errno::EBADSLT);
+    /// `EBFONT`
+    pub const BFONT: Self = Self::from_errno(errno::EBFONT);
+    /// `EBUSY`
+    pub const BUSY: Self = Self::from_errno(errno::EBUSY);
+    /// `ECANCELED`
+    pub const CANCELED: Self = Self::from_errno(errno::ECANCELED);
+    /// `ECHILD`
+    pub const CHILD: Self = Self::from_errno(errno::ECHILD);
+    /// `ECHRNG`
+    pub const CHRNG: Self = Self::from_errno(errno::ECHRNG);
+    /// `ECOMM`
+    pub const COMM: Self = Self::from_errno(errno::ECOMM);
+    /// `ECONNABORTED`
+    pub const CONNABORTED: Self = Self::from_errno(errno::ECONNABORTED);
+    /// `ECONNREFUSED`
+    pub const CONNREFUSED: Self = Self::from_errno(errno::ECONNREFUSED);
+    /// `ECONNRESET`
+    pub const CONNRESET: Self = Self::from_errno(errno::ECONNRESET);
+    /// `EDEADLK`
+    pub const DEADLK: Self = Self::from_errno(errno::EDEADLK);
+    /// `EDEADLOCK`
+    pub const DEADLOCK: Self = Self::from_errno(errno::EDEADLOCK);
+    /// `EDESTADDRREQ`
+    pub const DESTADDRREQ: Self = Self::from_errno(errno::EDESTADDRREQ);
+    /// `EDOM`
+    pub const DOM: Self = Self::from_errno(errno::EDOM);
+    /// `EDOTDOT`
+    pub const DOTDOT: Self = Self::from_errno(errno::EDOTDOT);
+    /// `EDQUOT`
+    pub const DQUOT: Self = Self::from_errno(errno::EDQUOT);
+    /// `EEXIST`
+    pub const EXIST: Self = Self::from_errno(errno::EEXIST);
+    /// `EFAULT`
+    pub const FAULT: Self = Self::from_errno(errno::EFAULT);
+    /// `EFBIG`
+    pub const FBIG: Self = Self::from_errno(errno::EFBIG);
+    /// `EHOSTDOWN`
+    pub const HOSTDOWN: Self = Self::from_errno(errno::EHOSTDOWN);
+    /// `EHOSTUNREACH`
+    pub const HOSTUNREACH: Self = Self::from_errno(errno::EHOSTUNREACH);
+    /// `EHWPOISON`
+    pub const HWPOISON: Self = Self::from_errno(errno::EHWPOISON);
+    /// `EIDRM`
+    pub const IDRM: Self = Self::from_errno(errno::EIDRM);
+    /// `EILSEQ`
+    pub const ILSEQ: Self = Self::from_errno(errno::EILSEQ);
+    /// `EINPROGRESS`
+    pub const INPROGRESS: Self = Self::from_errno(errno::EINPROGRESS);
+    /// `EINTR`.
+    ///
+    /// For a convenient way to retry system calls that exit with `INTR`, use
+    /// [`retry_on_intr`].
+    ///
+    /// [`retry_on_intr`]: io::retry_on_intr
+    pub const INTR: Self = Self::from_errno(errno::EINTR);
+    /// `EINVAL`
+    pub const INVAL: Self = Self::from_errno(errno::EINVAL);
+    /// `EIO`
+    pub const IO: Self = Self::from_errno(errno::EIO);
+    /// `EISCONN`
+    pub const ISCONN: Self = Self::from_errno(errno::EISCONN);
+    /// `EISDIR`
+    pub const ISDIR: Self = Self::from_errno(errno::EISDIR);
+    /// `EISNAM`
+    pub const ISNAM: Self = Self::from_errno(errno::EISNAM);
+    /// `EKEYEXPIRED`
+    pub const KEYEXPIRED: Self = Self::from_errno(errno::EKEYEXPIRED);
+    /// `EKEYREJECTED`
+    pub const KEYREJECTED: Self = Self::from_errno(errno::EKEYREJECTED);
+    /// `EKEYREVOKED`
+    pub const KEYREVOKED: Self = Self::from_errno(errno::EKEYREVOKED);
+    /// `EL2HLT`
+    pub const L2HLT: Self = Self::from_errno(errno::EL2HLT);
+    /// `EL2NSYNC`
+    pub const L2NSYNC: Self = Self::from_errno(errno::EL2NSYNC);
+    /// `EL3HLT`
+    pub const L3HLT: Self = Self::from_errno(errno::EL3HLT);
+    /// `EL3RST`
+    pub const L3RST: Self = Self::from_errno(errno::EL3RST);
+    /// `ELIBACC`
+    pub const LIBACC: Self = Self::from_errno(errno::ELIBACC);
+    /// `ELIBBAD`
+    pub const LIBBAD: Self = Self::from_errno(errno::ELIBBAD);
+    /// `ELIBEXEC`
+    pub const LIBEXEC: Self = Self::from_errno(errno::ELIBEXEC);
+    /// `ELIBMAX`
+    pub const LIBMAX: Self = Self::from_errno(errno::ELIBMAX);
+    /// `ELIBSCN`
+    pub const LIBSCN: Self = Self::from_errno(errno::ELIBSCN);
+    /// `ELNRNG`
+    pub const LNRNG: Self = Self::from_errno(errno::ELNRNG);
+    /// `ELOOP`
+    pub const LOOP: Self = Self::from_errno(errno::ELOOP);
+    /// `EMEDIUMTYPE`
+    pub const MEDIUMTYPE: Self = Self::from_errno(errno::EMEDIUMTYPE);
+    /// `EMFILE`
+    pub const MFILE: Self = Self::from_errno(errno::EMFILE);
+    /// `EMLINK`
+    pub const MLINK: Self = Self::from_errno(errno::EMLINK);
+    /// `EMSGSIZE`
+    pub const MSGSIZE: Self = Self::from_errno(errno::EMSGSIZE);
+    /// `EMULTIHOP`
+    pub const MULTIHOP: Self = Self::from_errno(errno::EMULTIHOP);
+    /// `ENAMETOOLONG`
+    pub const NAMETOOLONG: Self = Self::from_errno(errno::ENAMETOOLONG);
+    /// `ENAVAIL`
+    pub const NAVAIL: Self = Self::from_errno(errno::ENAVAIL);
+    /// `ENETDOWN`
+    pub const NETDOWN: Self = Self::from_errno(errno::ENETDOWN);
+    /// `ENETRESET`
+    pub const NETRESET: Self = Self::from_errno(errno::ENETRESET);
+    /// `ENETUNREACH`
+    pub const NETUNREACH: Self = Self::from_errno(errno::ENETUNREACH);
+    /// `ENFILE`
+    pub const NFILE: Self = Self::from_errno(errno::ENFILE);
+    /// `ENOANO`
+    pub const NOANO: Self = Self::from_errno(errno::ENOANO);
+    /// `ENOBUFS`
+    pub const NOBUFS: Self = Self::from_errno(errno::ENOBUFS);
+    /// `ENOCSI`
+    pub const NOCSI: Self = Self::from_errno(errno::ENOCSI);
+    /// `ENODATA`
+    #[doc(alias = "NOATTR")]
+    pub const NODATA: Self = Self::from_errno(errno::ENODATA);
+    /// `ENODEV`
+    pub const NODEV: Self = Self::from_errno(errno::ENODEV);
+    /// `ENOENT`
+    pub const NOENT: Self = Self::from_errno(errno::ENOENT);
+    /// `ENOEXEC`
+    pub const NOEXEC: Self = Self::from_errno(errno::ENOEXEC);
+    /// `ENOKEY`
+    pub const NOKEY: Self = Self::from_errno(errno::ENOKEY);
+    /// `ENOLCK`
+    pub const NOLCK: Self = Self::from_errno(errno::ENOLCK);
+    /// `ENOLINK`
+    pub const NOLINK: Self = Self::from_errno(errno::ENOLINK);
+    /// `ENOMEDIUM`
+    pub const NOMEDIUM: Self = Self::from_errno(errno::ENOMEDIUM);
+    /// `ENOMEM`
+    pub const NOMEM: Self = Self::from_errno(errno::ENOMEM);
+    /// `ENOMSG`
+    pub const NOMSG: Self = Self::from_errno(errno::ENOMSG);
+    /// `ENONET`
+    pub const NONET: Self = Self::from_errno(errno::ENONET);
+    /// `ENOPKG`
+    pub const NOPKG: Self = Self::from_errno(errno::ENOPKG);
+    /// `ENOPROTOOPT`
+    pub const NOPROTOOPT: Self = Self::from_errno(errno::ENOPROTOOPT);
+    /// `ENOSPC`
+    pub const NOSPC: Self = Self::from_errno(errno::ENOSPC);
+    /// `ENOSR`
+    pub const NOSR: Self = Self::from_errno(errno::ENOSR);
+    /// `ENOSTR`
+    pub const NOSTR: Self = Self::from_errno(errno::ENOSTR);
+    /// `ENOSYS`
+    pub const NOSYS: Self = Self::from_errno(errno::ENOSYS);
+    /// `ENOTBLK`
+    pub const NOTBLK: Self = Self::from_errno(errno::ENOTBLK);
+    /// `ENOTCONN`
+    pub const NOTCONN: Self = Self::from_errno(errno::ENOTCONN);
+    /// `ENOTDIR`
+    pub const NOTDIR: Self = Self::from_errno(errno::ENOTDIR);
+    /// `ENOTEMPTY`
+    pub const NOTEMPTY: Self = Self::from_errno(errno::ENOTEMPTY);
+    /// `ENOTNAM`
+    pub const NOTNAM: Self = Self::from_errno(errno::ENOTNAM);
+    /// `ENOTRECOVERABLE`
+    pub const NOTRECOVERABLE: Self = Self::from_errno(errno::ENOTRECOVERABLE);
+    /// `ENOTSOCK`
+    pub const NOTSOCK: Self = Self::from_errno(errno::ENOTSOCK);
+    /// `ENOTSUP`
+    // On Linux, `ENOTSUP` has the same value as `EOPNOTSUPP`.
+    pub const NOTSUP: Self = Self::from_errno(errno::EOPNOTSUPP);
+    /// `ENOTTY`
+    pub const NOTTY: Self = Self::from_errno(errno::ENOTTY);
+    /// `ENOTUNIQ`
+    pub const NOTUNIQ: Self = Self::from_errno(errno::ENOTUNIQ);
+    /// `ENXIO`
+    pub const NXIO: Self = Self::from_errno(errno::ENXIO);
+    /// `EOPNOTSUPP`
+    pub const OPNOTSUPP: Self = Self::from_errno(errno::EOPNOTSUPP);
+    /// `EOVERFLOW`
+    pub const OVERFLOW: Self = Self::from_errno(errno::EOVERFLOW);
+    /// `EOWNERDEAD`
+    pub const OWNERDEAD: Self = Self::from_errno(errno::EOWNERDEAD);
+    /// `EPERM`
+    pub const PERM: Self = Self::from_errno(errno::EPERM);
+    /// `EPFNOSUPPORT`
+    pub const PFNOSUPPORT: Self = Self::from_errno(errno::EPFNOSUPPORT);
+    /// `EPIPE`
+    pub const PIPE: Self = Self::from_errno(errno::EPIPE);
+    /// `EPROTO`
+    pub const PROTO: Self = Self::from_errno(errno::EPROTO);
+    /// `EPROTONOSUPPORT`
+    pub const PROTONOSUPPORT: Self = Self::from_errno(errno::EPROTONOSUPPORT);
+    /// `EPROTOTYPE`
+    pub const PROTOTYPE: Self = Self::from_errno(errno::EPROTOTYPE);
+    /// `ERANGE`
+    pub const RANGE: Self = Self::from_errno(errno::ERANGE);
+    /// `EREMCHG`
+    pub const REMCHG: Self = Self::from_errno(errno::EREMCHG);
+    /// `EREMOTE`
+    pub const REMOTE: Self = Self::from_errno(errno::EREMOTE);
+    /// `EREMOTEIO`
+    pub const REMOTEIO: Self = Self::from_errno(errno::EREMOTEIO);
+    /// `ERESTART`
+    pub const RESTART: Self = Self::from_errno(errno::ERESTART);
+    /// `ERFKILL`
+    pub const RFKILL: Self = Self::from_errno(errno::ERFKILL);
+    /// `EROFS`
+    pub const ROFS: Self = Self::from_errno(errno::EROFS);
+    /// `ESHUTDOWN`
+    pub const SHUTDOWN: Self = Self::from_errno(errno::ESHUTDOWN);
+    /// `ESOCKTNOSUPPORT`
+    pub const SOCKTNOSUPPORT: Self = Self::from_errno(errno::ESOCKTNOSUPPORT);
+    /// `ESPIPE`
+    pub const SPIPE: Self = Self::from_errno(errno::ESPIPE);
+    /// `ESRCH`
+    pub const SRCH: Self = Self::from_errno(errno::ESRCH);
+    /// `ESRMNT`
+    pub const SRMNT: Self = Self::from_errno(errno::ESRMNT);
+    /// `ESTALE`
+    pub const STALE: Self = Self::from_errno(errno::ESTALE);
+    /// `ESTRPIPE`
+    pub const STRPIPE: Self = Self::from_errno(errno::ESTRPIPE);
+    /// `ETIME`
+    pub const TIME: Self = Self::from_errno(errno::ETIME);
+    /// `ETIMEDOUT`
+    pub const TIMEDOUT: Self = Self::from_errno(errno::ETIMEDOUT);
+    /// `E2BIG`
+    #[doc(alias = "2BIG")]
+    pub const TOOBIG: Self = Self::from_errno(errno::E2BIG);
+    /// `ETOOMANYREFS`
+    pub const TOOMANYREFS: Self = Self::from_errno(errno::ETOOMANYREFS);
+    /// `ETXTBSY`
+    pub const TXTBSY: Self = Self::from_errno(errno::ETXTBSY);
+    /// `EUCLEAN`
+    pub const UCLEAN: Self = Self::from_errno(errno::EUCLEAN);
+    /// `EUNATCH`
+    pub const UNATCH: Self = Self::from_errno(errno::EUNATCH);
+    /// `EUSERS`
+    pub const USERS: Self = Self::from_errno(errno::EUSERS);
+    /// `EWOULDBLOCK`
+    pub const WOULDBLOCK: Self = Self::from_errno(errno::EWOULDBLOCK);
+    /// `EXDEV`
+    pub const XDEV: Self = Self::from_errno(errno::EXDEV);
+    /// `EXFULL`
+    pub const XFULL: Self = Self::from_errno(errno::EXFULL);
+}
diff --git a/vendor/rustix/src/backend/linux_raw/io/mod.rs b/vendor/rustix/src/backend/linux_raw/io/mod.rs
new file mode 100644
index 0000000..9477b9b
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/io/mod.rs
@@ -0,0 +1,3 @@
+pub(crate) mod errno;
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/io/syscalls.rs b/vendor/rustix/src/backend/linux_raw/io/syscalls.rs
new file mode 100644
index 0000000..c38f28f
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/io/syscalls.rs
@@ -0,0 +1,379 @@
+//! linux_raw syscalls supporting `rustix::io`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code)]
+#![allow(clippy::undocumented_unsafe_blocks)]
+
+#[cfg(target_pointer_width = "64")]
+use crate::backend::conv::loff_t_from_u64;
+#[cfg(all(
+    target_pointer_width = "32",
+    any(target_arch = "arm", target_arch = "mips", target_arch = "mips32r6"),
+))]
+use crate::backend::conv::zero;
+use crate::backend::conv::{
+    c_uint, pass_usize, raw_fd, ret, ret_c_int, ret_c_uint, ret_discarded_fd, ret_owned_fd,
+    ret_usize, slice,
+};
+#[cfg(target_pointer_width = "32")]
+use crate::backend::conv::{hi, lo};
+use crate::backend::{c, MAX_IOV};
+use crate::fd::{AsFd, BorrowedFd, OwnedFd, RawFd};
+use crate::io::{self, DupFlags, FdFlags, IoSlice, IoSliceMut, ReadWriteFlags};
+use crate::ioctl::{IoctlOutput, RawOpcode};
+#[cfg(all(feature = "fs", feature = "net"))]
+use crate::net::{RecvFlags, SendFlags};
+use core::cmp;
+use linux_raw_sys::general::{F_DUPFD_CLOEXEC, F_GETFD, F_SETFD};
+
+#[inline]
+pub(crate) unsafe fn read(fd: BorrowedFd<'_>, buf: *mut u8, len: usize) -> io::Result<usize> {
+    ret_usize(syscall!(__NR_read, fd, buf, pass_usize(len)))
+}
+
+#[inline]
+pub(crate) unsafe fn pread(
+    fd: BorrowedFd<'_>,
+    buf: *mut u8,
+    len: usize,
+    pos: u64,
+) -> io::Result<usize> {
+    // <https://github.com/torvalds/linux/blob/fcadab740480e0e0e9fa9bd272acd409884d431a/arch/arm64/kernel/sys32.c#L75>
+    #[cfg(all(
+        target_pointer_width = "32",
+        any(target_arch = "arm", target_arch = "mips", target_arch = "mips32r6"),
+    ))]
+    {
+        ret_usize(syscall!(
+            __NR_pread64,
+            fd,
+            buf,
+            pass_usize(len),
+            zero(),
+            hi(pos),
+            lo(pos)
+        ))
+    }
+    #[cfg(all(
+        target_pointer_width = "32",
+        not(any(target_arch = "arm", target_arch = "mips", target_arch = "mips32r6")),
+    ))]
+    {
+        ret_usize(syscall!(
+            __NR_pread64,
+            fd,
+            buf,
+            pass_usize(len),
+            hi(pos),
+            lo(pos)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    ret_usize(syscall!(
+        __NR_pread64,
+        fd,
+        buf,
+        pass_usize(len),
+        loff_t_from_u64(pos)
+    ))
+}
+
+#[inline]
+pub(crate) fn readv(fd: BorrowedFd<'_>, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+    let (bufs_addr, bufs_len) = slice(&bufs[..cmp::min(bufs.len(), MAX_IOV)]);
+
+    unsafe { ret_usize(syscall!(__NR_readv, fd, bufs_addr, bufs_len)) }
+}
+
+#[inline]
+pub(crate) fn preadv(
+    fd: BorrowedFd<'_>,
+    bufs: &mut [IoSliceMut<'_>],
+    pos: u64,
+) -> io::Result<usize> {
+    let (bufs_addr, bufs_len) = slice(&bufs[..cmp::min(bufs.len(), MAX_IOV)]);
+
+    // Unlike the plain "p" functions, the "pv" functions pass their offset in
+    // an endian-independent way, and always in two registers.
+    unsafe {
+        ret_usize(syscall!(
+            __NR_preadv,
+            fd,
+            bufs_addr,
+            bufs_len,
+            pass_usize(pos as usize),
+            pass_usize((pos >> 32) as usize)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn preadv2(
+    fd: BorrowedFd<'_>,
+    bufs: &mut [IoSliceMut<'_>],
+    pos: u64,
+    flags: ReadWriteFlags,
+) -> io::Result<usize> {
+    let (bufs_addr, bufs_len) = slice(&bufs[..cmp::min(bufs.len(), MAX_IOV)]);
+
+    // Unlike the plain "p" functions, the "pv" functions pass their offset in
+    // an endian-independent way, and always in two registers.
+    unsafe {
+        ret_usize(syscall!(
+            __NR_preadv2,
+            fd,
+            bufs_addr,
+            bufs_len,
+            pass_usize(pos as usize),
+            pass_usize((pos >> 32) as usize),
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn write(fd: BorrowedFd<'_>, buf: &[u8]) -> io::Result<usize> {
+    let (buf_addr, buf_len) = slice(buf);
+
+    unsafe { ret_usize(syscall_readonly!(__NR_write, fd, buf_addr, buf_len)) }
+}
+
+#[inline]
+pub(crate) fn pwrite(fd: BorrowedFd<'_>, buf: &[u8], pos: u64) -> io::Result<usize> {
+    let (buf_addr, buf_len) = slice(buf);
+
+    // <https://github.com/torvalds/linux/blob/fcadab740480e0e0e9fa9bd272acd409884d431a/arch/arm64/kernel/sys32.c#L81-L83>
+    #[cfg(all(
+        target_pointer_width = "32",
+        any(target_arch = "arm", target_arch = "mips", target_arch = "mips32r6"),
+    ))]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_pwrite64,
+            fd,
+            buf_addr,
+            buf_len,
+            zero(),
+            hi(pos),
+            lo(pos)
+        ))
+    }
+    #[cfg(all(
+        target_pointer_width = "32",
+        not(any(target_arch = "arm", target_arch = "mips", target_arch = "mips32r6")),
+    ))]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_pwrite64,
+            fd,
+            buf_addr,
+            buf_len,
+            hi(pos),
+            lo(pos)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_pwrite64,
+            fd,
+            buf_addr,
+            buf_len,
+            loff_t_from_u64(pos)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn writev(fd: BorrowedFd<'_>, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+    let (bufs_addr, bufs_len) = slice(&bufs[..cmp::min(bufs.len(), MAX_IOV)]);
+
+    unsafe { ret_usize(syscall_readonly!(__NR_writev, fd, bufs_addr, bufs_len)) }
+}
+
+#[inline]
+pub(crate) fn pwritev(fd: BorrowedFd<'_>, bufs: &[IoSlice<'_>], pos: u64) -> io::Result<usize> {
+    let (bufs_addr, bufs_len) = slice(&bufs[..cmp::min(bufs.len(), MAX_IOV)]);
+
+    // Unlike the plain "p" functions, the "pv" functions pass their offset in
+    // an endian-independent way, and always in two registers.
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_pwritev,
+            fd,
+            bufs_addr,
+            bufs_len,
+            pass_usize(pos as usize),
+            pass_usize((pos >> 32) as usize)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn pwritev2(
+    fd: BorrowedFd<'_>,
+    bufs: &[IoSlice<'_>],
+    pos: u64,
+    flags: ReadWriteFlags,
+) -> io::Result<usize> {
+    let (bufs_addr, bufs_len) = slice(&bufs[..cmp::min(bufs.len(), MAX_IOV)]);
+
+    // Unlike the plain "p" functions, the "pv" functions pass their offset in
+    // an endian-independent way, and always in two registers.
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_pwritev2,
+            fd,
+            bufs_addr,
+            bufs_len,
+            pass_usize(pos as usize),
+            pass_usize((pos >> 32) as usize),
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn close(fd: RawFd) {
+    // See the documentation for [`io::close`] for why errors are ignored.
+    syscall_readonly!(__NR_close, raw_fd(fd)).decode_void();
+}
+
+#[inline]
+pub(crate) unsafe fn ioctl(
+    fd: BorrowedFd<'_>,
+    request: RawOpcode,
+    arg: *mut c::c_void,
+) -> io::Result<IoctlOutput> {
+    ret_c_int(syscall!(__NR_ioctl, fd, c_uint(request), arg))
+}
+
+#[inline]
+pub(crate) unsafe fn ioctl_readonly(
+    fd: BorrowedFd<'_>,
+    request: RawOpcode,
+    arg: *mut c::c_void,
+) -> io::Result<IoctlOutput> {
+    ret_c_int(syscall_readonly!(__NR_ioctl, fd, c_uint(request), arg))
+}
+
+#[cfg(all(feature = "fs", feature = "net"))]
+pub(crate) fn is_read_write(fd: BorrowedFd<'_>) -> io::Result<(bool, bool)> {
+    let (mut read, mut write) = crate::fs::fd::_is_file_read_write(fd)?;
+    let mut not_socket = false;
+    if read {
+        // Do a `recv` with `PEEK` and `DONTWAIT` for 1 byte. A 0 indicates
+        // the read side is shut down; an `EWOULDBLOCK` indicates the read
+        // side is still open.
+        let mut buf = [core::mem::MaybeUninit::<u8>::uninit()];
+        match unsafe {
+            crate::backend::net::syscalls::recv(
+                fd,
+                buf.as_mut_ptr() as *mut u8,
+                1,
+                RecvFlags::PEEK | RecvFlags::DONTWAIT,
+            )
+        } {
+            Ok(0) => read = false,
+            Err(err) => {
+                #[allow(unreachable_patterns)] // `EAGAIN` may equal `EWOULDBLOCK`
+                match err {
+                    io::Errno::AGAIN | io::Errno::WOULDBLOCK => (),
+                    io::Errno::NOTSOCK => not_socket = true,
+                    _ => return Err(err),
+                }
+            }
+            Ok(_) => (),
+        }
+    }
+    if write && !not_socket {
+        // Do a `send` with `DONTWAIT` for 0 bytes. An `EPIPE` indicates
+        // the write side is shut down.
+        #[allow(unreachable_patterns)] // `EAGAIN` equals `EWOULDBLOCK`
+        match crate::backend::net::syscalls::send(fd, &[], SendFlags::DONTWAIT) {
+            Err(io::Errno::AGAIN | io::Errno::WOULDBLOCK | io::Errno::NOTSOCK) => (),
+            Err(io::Errno::PIPE) => write = false,
+            Err(err) => return Err(err),
+            Ok(_) => (),
+        }
+    }
+    Ok((read, write))
+}
+
+#[inline]
+pub(crate) fn dup(fd: BorrowedFd<'_>) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_dup, fd)) }
+}
+
+#[allow(clippy::needless_pass_by_ref_mut)]
+#[inline]
+pub(crate) fn dup2(fd: BorrowedFd<'_>, new: &mut OwnedFd) -> io::Result<()> {
+    #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+    {
+        // We don't need to worry about the difference between `dup2` and
+        // `dup3` when the file descriptors are equal because we have an
+        // `&mut OwnedFd` which means `fd` doesn't alias it.
+        dup3(fd, new, DupFlags::empty())
+    }
+
+    #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+    unsafe {
+        ret_discarded_fd(syscall_readonly!(__NR_dup2, fd, new.as_fd()))
+    }
+}
+
+#[allow(clippy::needless_pass_by_ref_mut)]
+#[inline]
+pub(crate) fn dup3(fd: BorrowedFd<'_>, new: &mut OwnedFd, flags: DupFlags) -> io::Result<()> {
+    unsafe { ret_discarded_fd(syscall_readonly!(__NR_dup3, fd, new.as_fd(), flags)) }
+}
+
+#[inline]
+pub(crate) fn fcntl_getfd(fd: BorrowedFd<'_>) -> io::Result<FdFlags> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret_c_uint(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GETFD)))
+            .map(FdFlags::from_bits_retain)
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret_c_uint(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETFD)))
+            .map(FdFlags::from_bits_retain)
+    }
+}
+
+#[inline]
+pub(crate) fn fcntl_setfd(fd: BorrowedFd<'_>, flags: FdFlags) -> io::Result<()> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_SETFD), flags))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(__NR_fcntl, fd, c_uint(F_SETFD), flags))
+    }
+}
+
+#[inline]
+pub(crate) fn fcntl_dupfd_cloexec(fd: BorrowedFd<'_>, min: RawFd) -> io::Result<OwnedFd> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret_owned_fd(syscall_readonly!(
+            __NR_fcntl64,
+            fd,
+            c_uint(F_DUPFD_CLOEXEC),
+            raw_fd(min)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret_owned_fd(syscall_readonly!(
+            __NR_fcntl,
+            fd,
+            c_uint(F_DUPFD_CLOEXEC),
+            raw_fd(min)
+        ))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/io/types.rs b/vendor/rustix/src/backend/linux_raw/io/types.rs
new file mode 100644
index 0000000..4b3dfc6
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/io/types.rs
@@ -0,0 +1,57 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `FD_*` constants for use with [`fcntl_getfd`] and [`fcntl_setfd`].
+    ///
+    /// [`fcntl_getfd`]: crate::io::fcntl_getfd
+    /// [`fcntl_setfd`]: crate::io::fcntl_setfd
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FdFlags: c::c_uint {
+        /// `FD_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::FD_CLOEXEC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `RWF_*` constants for use with [`preadv2`] and [`pwritev2`].
+    ///
+    /// [`preadv2`]: crate::io::preadv2
+    /// [`pwritev2`]: crate::io::pwritev
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct ReadWriteFlags: c::c_uint {
+        /// `RWF_DSYNC` (since Linux 4.7)
+        const DSYNC = linux_raw_sys::general::RWF_DSYNC;
+        /// `RWF_HIPRI` (since Linux 4.6)
+        const HIPRI = linux_raw_sys::general::RWF_HIPRI;
+        /// `RWF_SYNC` (since Linux 4.7)
+        const SYNC = linux_raw_sys::general::RWF_SYNC;
+        /// `RWF_NOWAIT` (since Linux 4.14)
+        const NOWAIT = linux_raw_sys::general::RWF_NOWAIT;
+        /// `RWF_APPEND` (since Linux 4.16)
+        const APPEND = linux_raw_sys::general::RWF_APPEND;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `O_*` constants for use with [`dup2`].
+    ///
+    /// [`dup2`]: crate::io::dup2
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct DupFlags: c::c_uint {
+        /// `O_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::O_CLOEXEC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/io_uring/mod.rs b/vendor/rustix/src/backend/linux_raw/io_uring/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/io_uring/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/linux_raw/io_uring/syscalls.rs b/vendor/rustix/src/backend/linux_raw/io_uring/syscalls.rs
new file mode 100644
index 0000000..d10cd13
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/io_uring/syscalls.rs
@@ -0,0 +1,62 @@
+//! linux_raw syscalls supporting `rustix::io_uring`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend::syscalls` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::conv::{by_mut, c_uint, pass_usize, ret_c_uint, ret_owned_fd};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io;
+use crate::io_uring::{io_uring_params, IoringEnterFlags, IoringRegisterOp};
+use core::ffi::c_void;
+
+#[inline]
+pub(crate) fn io_uring_setup(entries: u32, params: &mut io_uring_params) -> io::Result<OwnedFd> {
+    unsafe {
+        ret_owned_fd(syscall!(
+            __NR_io_uring_setup,
+            c_uint(entries),
+            by_mut(params)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn io_uring_register(
+    fd: BorrowedFd<'_>,
+    opcode: IoringRegisterOp,
+    arg: *const c_void,
+    nr_args: u32,
+) -> io::Result<u32> {
+    ret_c_uint(syscall_readonly!(
+        __NR_io_uring_register,
+        fd,
+        c_uint(opcode as u32),
+        arg,
+        c_uint(nr_args)
+    ))
+}
+
+#[inline]
+pub(crate) unsafe fn io_uring_enter(
+    fd: BorrowedFd<'_>,
+    to_submit: u32,
+    min_complete: u32,
+    flags: IoringEnterFlags,
+    arg: *const c_void,
+    size: usize,
+) -> io::Result<u32> {
+    // This is not `_readonly` because `io_uring_enter` waits for I/O to
+    // complete, and I/O could involve writing to memory buffers, which
+    // could be a side effect depended on by the caller.
+    ret_c_uint(syscall!(
+        __NR_io_uring_enter,
+        fd,
+        c_uint(to_submit),
+        c_uint(min_complete),
+        flags,
+        arg,
+        pass_usize(size)
+    ))
+}
diff --git a/vendor/rustix/src/backend/linux_raw/mm/mod.rs b/vendor/rustix/src/backend/linux_raw/mm/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/mm/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/mm/syscalls.rs b/vendor/rustix/src/backend/linux_raw/mm/syscalls.rs
new file mode 100644
index 0000000..361f111
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/mm/syscalls.rs
@@ -0,0 +1,237 @@
+//! linux_raw syscalls supporting `rustix::io`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code)]
+#![allow(clippy::undocumented_unsafe_blocks)]
+
+use super::types::{
+    Advice, MapFlags, MlockAllFlags, MlockFlags, MprotectFlags, MremapFlags, MsyncFlags, ProtFlags,
+    UserfaultfdFlags,
+};
+use crate::backend::c;
+#[cfg(target_pointer_width = "64")]
+use crate::backend::conv::loff_t_from_u64;
+use crate::backend::conv::{c_uint, no_fd, pass_usize, ret, ret_owned_fd, ret_void_star};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io;
+use linux_raw_sys::general::MAP_ANONYMOUS;
+
+#[inline]
+pub(crate) fn madvise(addr: *mut c::c_void, len: usize, advice: Advice) -> io::Result<()> {
+    unsafe {
+        ret(syscall!(
+            __NR_madvise,
+            addr,
+            pass_usize(len),
+            c_uint(advice as c::c_uint)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn msync(addr: *mut c::c_void, len: usize, flags: MsyncFlags) -> io::Result<()> {
+    ret(syscall!(__NR_msync, addr, pass_usize(len), flags))
+}
+
+/// # Safety
+///
+/// `mmap` is primarily unsafe due to the `addr` parameter, as anything working
+/// with memory pointed to by raw pointers is unsafe.
+#[inline]
+pub(crate) unsafe fn mmap(
+    addr: *mut c::c_void,
+    length: usize,
+    prot: ProtFlags,
+    flags: MapFlags,
+    fd: BorrowedFd<'_>,
+    offset: u64,
+) -> io::Result<*mut c::c_void> {
+    #[cfg(target_pointer_width = "32")]
+    {
+        ret_void_star(syscall!(
+            __NR_mmap2,
+            addr,
+            pass_usize(length),
+            prot,
+            flags,
+            fd,
+            (offset / 4096)
+                .try_into()
+                .map(pass_usize)
+                .map_err(|_| io::Errno::INVAL)?
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    {
+        ret_void_star(syscall!(
+            __NR_mmap,
+            addr,
+            pass_usize(length),
+            prot,
+            flags,
+            fd,
+            loff_t_from_u64(offset)
+        ))
+    }
+}
+
+/// # Safety
+///
+/// `mmap` is primarily unsafe due to the `addr` parameter, as anything working
+/// with memory pointed to by raw pointers is unsafe.
+#[inline]
+pub(crate) unsafe fn mmap_anonymous(
+    addr: *mut c::c_void,
+    length: usize,
+    prot: ProtFlags,
+    flags: MapFlags,
+) -> io::Result<*mut c::c_void> {
+    #[cfg(target_pointer_width = "32")]
+    {
+        ret_void_star(syscall!(
+            __NR_mmap2,
+            addr,
+            pass_usize(length),
+            prot,
+            c_uint(flags.bits() | MAP_ANONYMOUS),
+            no_fd(),
+            pass_usize(0)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    {
+        ret_void_star(syscall!(
+            __NR_mmap,
+            addr,
+            pass_usize(length),
+            prot,
+            c_uint(flags.bits() | MAP_ANONYMOUS),
+            no_fd(),
+            loff_t_from_u64(0)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn mprotect(
+    ptr: *mut c::c_void,
+    len: usize,
+    flags: MprotectFlags,
+) -> io::Result<()> {
+    ret(syscall!(__NR_mprotect, ptr, pass_usize(len), flags))
+}
+
+/// # Safety
+///
+/// `munmap` is primarily unsafe due to the `addr` parameter, as anything
+/// working with memory pointed to by raw pointers is unsafe.
+#[inline]
+pub(crate) unsafe fn munmap(addr: *mut c::c_void, length: usize) -> io::Result<()> {
+    ret(syscall!(__NR_munmap, addr, pass_usize(length)))
+}
+
+/// # Safety
+///
+/// `mremap` is primarily unsafe due to the `old_address` parameter, as
+/// anything working with memory pointed to by raw pointers is unsafe.
+#[inline]
+pub(crate) unsafe fn mremap(
+    old_address: *mut c::c_void,
+    old_size: usize,
+    new_size: usize,
+    flags: MremapFlags,
+) -> io::Result<*mut c::c_void> {
+    ret_void_star(syscall!(
+        __NR_mremap,
+        old_address,
+        pass_usize(old_size),
+        pass_usize(new_size),
+        flags
+    ))
+}
+
+/// # Safety
+///
+/// `mremap_fixed` is primarily unsafe due to the `old_address` and
+/// `new_address` parameters, as anything working with memory pointed to by raw
+/// pointers is unsafe.
+#[inline]
+pub(crate) unsafe fn mremap_fixed(
+    old_address: *mut c::c_void,
+    old_size: usize,
+    new_size: usize,
+    flags: MremapFlags,
+    new_address: *mut c::c_void,
+) -> io::Result<*mut c::c_void> {
+    ret_void_star(syscall!(
+        __NR_mremap,
+        old_address,
+        pass_usize(old_size),
+        pass_usize(new_size),
+        flags,
+        new_address
+    ))
+}
+
+/// # Safety
+///
+/// `mlock` operates on raw pointers and may round out to the nearest page
+/// boundaries.
+#[inline]
+pub(crate) unsafe fn mlock(addr: *mut c::c_void, length: usize) -> io::Result<()> {
+    ret(syscall!(__NR_mlock, addr, pass_usize(length)))
+}
+
+/// # Safety
+///
+/// `mlock_with` operates on raw pointers and may round out to the nearest page
+/// boundaries.
+#[inline]
+pub(crate) unsafe fn mlock_with(
+    addr: *mut c::c_void,
+    length: usize,
+    flags: MlockFlags,
+) -> io::Result<()> {
+    ret(syscall!(__NR_mlock2, addr, pass_usize(length), flags))
+}
+
+/// # Safety
+///
+/// `munlock` operates on raw pointers and may round out to the nearest page
+/// boundaries.
+#[inline]
+pub(crate) unsafe fn munlock(addr: *mut c::c_void, length: usize) -> io::Result<()> {
+    ret(syscall!(__NR_munlock, addr, pass_usize(length)))
+}
+
+#[inline]
+pub(crate) unsafe fn userfaultfd(flags: UserfaultfdFlags) -> io::Result<OwnedFd> {
+    ret_owned_fd(syscall_readonly!(__NR_userfaultfd, flags))
+}
+
+/// Locks all pages mapped into the address space of the calling process.
+///
+/// This includes the pages of the code, data, and stack segment, as well as
+/// shared libraries, user space kernel data, shared memory, and memory-mapped
+/// files. All mapped pages are guaranteed to be resident in RAM when the call
+/// returns successfully; the pages are guaranteed to stay in RAM until later
+/// unlocked.
+#[inline]
+pub(crate) fn mlockall(flags: MlockAllFlags) -> io::Result<()> {
+    // When `mlockall` is used with `MCL_ONFAULT | MCL_FUTURE`, the ordering
+    // of `mlockall` with respect to arbitrary loads may be significant,
+    // because if a load happens and evokes a fault before the `mlockall`,
+    // the memory doesn't get locked, but if the load and therefore
+    // the fault happens after, then the memory does get locked.
+    // So to be conservative in this regard, we use `syscall` instead
+    // of `syscall_readonly`
+    unsafe { ret(syscall!(__NR_mlockall, flags)) }
+}
+
+/// Unlocks all pages mapped into the address space of the calling process.
+#[inline]
+pub(crate) fn munlockall() -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_munlockall)) }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/mm/types.rs b/vendor/rustix/src/backend/linux_raw/mm/types.rs
new file mode 100644
index 0000000..68898f5
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/mm/types.rs
@@ -0,0 +1,295 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `PROT_*` flags for use with [`mmap`].
+    ///
+    /// For `PROT_NONE`, use `ProtFlags::empty()`.
+    ///
+    /// [`mmap`]: crate::mm::mmap
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct ProtFlags: u32 {
+        /// `PROT_READ`
+        const READ = linux_raw_sys::general::PROT_READ;
+        /// `PROT_WRITE`
+        const WRITE = linux_raw_sys::general::PROT_WRITE;
+        /// `PROT_EXEC`
+        const EXEC = linux_raw_sys::general::PROT_EXEC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `PROT_*` flags for use with [`mprotect`].
+    ///
+    /// For `PROT_NONE`, use `MprotectFlags::empty()`.
+    ///
+    /// [`mprotect`]: crate::mm::mprotect
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MprotectFlags: u32 {
+        /// `PROT_READ`
+        const READ = linux_raw_sys::general::PROT_READ;
+        /// `PROT_WRITE`
+        const WRITE = linux_raw_sys::general::PROT_WRITE;
+        /// `PROT_EXEC`
+        const EXEC = linux_raw_sys::general::PROT_EXEC;
+        /// `PROT_GROWSUP`
+        const GROWSUP = linux_raw_sys::general::PROT_GROWSUP;
+        /// `PROT_GROWSDOWN`
+        const GROWSDOWN = linux_raw_sys::general::PROT_GROWSDOWN;
+        /// `PROT_SEM`
+        const SEM = linux_raw_sys::general::PROT_SEM;
+        /// `PROT_BTI`
+        #[cfg(target_arch = "aarch64")]
+        const BTI = linux_raw_sys::general::PROT_BTI;
+        /// `PROT_MTE`
+        #[cfg(target_arch = "aarch64")]
+        const MTE = linux_raw_sys::general::PROT_MTE;
+        /// `PROT_SAO`
+        #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
+        const SAO = linux_raw_sys::general::PROT_SAO;
+        /// `PROT_ADI`
+        #[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
+        const ADI = linux_raw_sys::general::PROT_ADI;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MAP_*` flags for use with [`mmap`].
+    ///
+    /// For `MAP_ANONYMOUS` (aka `MAP_ANON`), see [`mmap_anonymous`].
+    ///
+    /// [`mmap`]: crate::mm::mmap
+    /// [`mmap_anonymous`]: crates::mm::mmap_anonymous
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MapFlags: u32 {
+        /// `MAP_SHARED`
+        const SHARED = linux_raw_sys::general::MAP_SHARED;
+        /// `MAP_SHARED_VALIDATE` (since Linux 4.15)
+        const SHARED_VALIDATE = linux_raw_sys::general::MAP_SHARED_VALIDATE;
+        /// `MAP_PRIVATE`
+        const PRIVATE = linux_raw_sys::general::MAP_PRIVATE;
+        /// `MAP_DENYWRITE`
+        const DENYWRITE = linux_raw_sys::general::MAP_DENYWRITE;
+        /// `MAP_FIXED`
+        const FIXED = linux_raw_sys::general::MAP_FIXED;
+        /// `MAP_FIXED_NOREPLACE` (since Linux 4.17)
+        const FIXED_NOREPLACE = linux_raw_sys::general::MAP_FIXED_NOREPLACE;
+        /// `MAP_GROWSDOWN`
+        const GROWSDOWN = linux_raw_sys::general::MAP_GROWSDOWN;
+        /// `MAP_HUGETLB`
+        const HUGETLB = linux_raw_sys::general::MAP_HUGETLB;
+        /// `MAP_HUGE_2MB` (since Linux 3.8)
+        const HUGE_2MB = linux_raw_sys::general::MAP_HUGE_2MB;
+        /// `MAP_HUGE_1GB` (since Linux 3.8)
+        const HUGE_1GB = linux_raw_sys::general::MAP_HUGE_1GB;
+        /// `MAP_LOCKED`
+        const LOCKED = linux_raw_sys::general::MAP_LOCKED;
+        /// `MAP_NORESERVE`
+        const NORESERVE = linux_raw_sys::general::MAP_NORESERVE;
+        /// `MAP_POPULATE`
+        const POPULATE = linux_raw_sys::general::MAP_POPULATE;
+        /// `MAP_STACK`
+        const STACK = linux_raw_sys::general::MAP_STACK;
+        /// `MAP_SYNC` (since Linux 4.15)
+        #[cfg(not(any(target_arch = "mips", target_arch = "mips32r6", target_arch = "mips64", target_arch = "mips64r6")))]
+        const SYNC = linux_raw_sys::general::MAP_SYNC;
+        /// `MAP_UNINITIALIZED`
+        #[cfg(not(any(target_arch = "mips", target_arch = "mips32r6", target_arch = "mips64", target_arch = "mips64r6")))]
+        const UNINITIALIZED = linux_raw_sys::general::MAP_UNINITIALIZED;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MREMAP_*` flags for use with [`mremap`].
+    ///
+    /// For `MREMAP_FIXED`, see [`mremap_fixed`].
+    ///
+    /// [`mremap`]: crate::mm::mremap
+    /// [`mremap_fixed`]: crate::mm::mremap_fixed
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MremapFlags: u32 {
+        /// `MREMAP_MAYMOVE`
+        const MAYMOVE = linux_raw_sys::general::MREMAP_MAYMOVE;
+        /// `MREMAP_DONTUNMAP` (since Linux 5.7)
+        const DONTUNMAP = linux_raw_sys::general::MREMAP_DONTUNMAP;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MS_*` flags for use with [`msync`].
+    ///
+    /// [`msync`]: crate::mm::msync
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MsyncFlags: u32 {
+        /// `MS_SYNC`—Requests an update and waits for it to complete.
+        const SYNC = linux_raw_sys::general::MS_SYNC;
+        /// `MS_ASYNC`—Specifies that an update be scheduled, but the call
+        /// returns immediately.
+        const ASYNC = linux_raw_sys::general::MS_ASYNC;
+        /// `MS_INVALIDATE`—Asks to invalidate other mappings of the same
+        /// file (so that they can be updated with the fresh values just
+        /// written).
+        const INVALIDATE = linux_raw_sys::general::MS_INVALIDATE;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MLOCK_*` flags for use with [`mlock_with`].
+    ///
+    /// [`mlock_with`]: crate::mm::mlock_with
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MlockFlags: u32 {
+        /// `MLOCK_ONFAULT`
+        const ONFAULT = linux_raw_sys::general::MLOCK_ONFAULT;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `POSIX_MADV_*` constants for use with [`madvise`].
+///
+/// [`madvise`]: crate::mm::madvise
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+#[repr(u32)]
+#[non_exhaustive]
+pub enum Advice {
+    /// `POSIX_MADV_NORMAL`
+    Normal = linux_raw_sys::general::MADV_NORMAL,
+
+    /// `POSIX_MADV_SEQUENTIAL`
+    Sequential = linux_raw_sys::general::MADV_SEQUENTIAL,
+
+    /// `POSIX_MADV_RANDOM`
+    Random = linux_raw_sys::general::MADV_RANDOM,
+
+    /// `POSIX_MADV_WILLNEED`
+    WillNeed = linux_raw_sys::general::MADV_WILLNEED,
+
+    /// `MADV_DONTNEED`
+    LinuxDontNeed = linux_raw_sys::general::MADV_DONTNEED,
+
+    /// `MADV_FREE` (since Linux 4.5)
+    LinuxFree = linux_raw_sys::general::MADV_FREE,
+    /// `MADV_REMOVE`
+    LinuxRemove = linux_raw_sys::general::MADV_REMOVE,
+    /// `MADV_DONTFORK`
+    LinuxDontFork = linux_raw_sys::general::MADV_DONTFORK,
+    /// `MADV_DOFORK`
+    LinuxDoFork = linux_raw_sys::general::MADV_DOFORK,
+    /// `MADV_HWPOISON`
+    LinuxHwPoison = linux_raw_sys::general::MADV_HWPOISON,
+    /// `MADV_SOFT_OFFLINE`
+    #[cfg(not(any(
+        target_arch = "mips",
+        target_arch = "mips32r6",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    )))]
+    LinuxSoftOffline = linux_raw_sys::general::MADV_SOFT_OFFLINE,
+    /// `MADV_MERGEABLE`
+    LinuxMergeable = linux_raw_sys::general::MADV_MERGEABLE,
+    /// `MADV_UNMERGEABLE`
+    LinuxUnmergeable = linux_raw_sys::general::MADV_UNMERGEABLE,
+    /// `MADV_HUGEPAGE`
+    LinuxHugepage = linux_raw_sys::general::MADV_HUGEPAGE,
+    /// `MADV_NOHUGEPAGE`
+    LinuxNoHugepage = linux_raw_sys::general::MADV_NOHUGEPAGE,
+    /// `MADV_DONTDUMP` (since Linux 3.4)
+    LinuxDontDump = linux_raw_sys::general::MADV_DONTDUMP,
+    /// `MADV_DODUMP` (since Linux 3.4)
+    LinuxDoDump = linux_raw_sys::general::MADV_DODUMP,
+    /// `MADV_WIPEONFORK` (since Linux 4.14)
+    LinuxWipeOnFork = linux_raw_sys::general::MADV_WIPEONFORK,
+    /// `MADV_KEEPONFORK` (since Linux 4.14)
+    LinuxKeepOnFork = linux_raw_sys::general::MADV_KEEPONFORK,
+    /// `MADV_COLD` (since Linux 5.4)
+    LinuxCold = linux_raw_sys::general::MADV_COLD,
+    /// `MADV_PAGEOUT` (since Linux 5.4)
+    LinuxPageOut = linux_raw_sys::general::MADV_PAGEOUT,
+    /// `MADV_POPULATE_READ` (since Linux 5.14)
+    LinuxPopulateRead = linux_raw_sys::general::MADV_POPULATE_READ,
+    /// `MADV_POPULATE_WRITE` (since Linux 5.14)
+    LinuxPopulateWrite = linux_raw_sys::general::MADV_POPULATE_WRITE,
+    /// `MADV_DONTNEED_LOCKED` (since Linux 5.18)
+    LinuxDontneedLocked = linux_raw_sys::general::MADV_DONTNEED_LOCKED,
+}
+
+#[allow(non_upper_case_globals)]
+impl Advice {
+    /// `POSIX_MADV_DONTNEED`
+    ///
+    /// On Linux, this is mapped to `POSIX_MADV_NORMAL` because Linux's
+    /// `MADV_DONTNEED` differs from `POSIX_MADV_DONTNEED`. See `LinuxDontNeed`
+    /// for the Linux behavior.
+    pub const DontNeed: Self = Self::Normal;
+}
+
+bitflags! {
+    /// `O_*` flags for use with [`userfaultfd`].
+    ///
+    /// [`userfaultfd`]: crate::mm::userfaultfd
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct UserfaultfdFlags: c::c_uint {
+        /// `O_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::O_CLOEXEC;
+        /// `O_NONBLOCK`
+        const NONBLOCK = linux_raw_sys::general::O_NONBLOCK;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MCL_*` flags for use with [`mlockall`].
+    ///
+    /// [`mlockall`]: crate::mm::mlockall
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MlockAllFlags: u32 {
+        /// Used together with `MCL_CURRENT`, `MCL_FUTURE`, or both. Mark all
+        /// current (with `MCL_CURRENT`) or future (with `MCL_FUTURE`) mappings
+        /// to lock pages when they are faulted in. When used with
+        /// `MCL_CURRENT`, all present pages are locked, but `mlockall` will
+        /// not fault in non-present pages. When used with `MCL_FUTURE`, all
+        /// future mappings will be marked to lock pages when they are faulted
+        /// in, but they will not be populated by the lock when the mapping is
+        /// created. `MCL_ONFAULT` must be used with either `MCL_CURRENT` or
+        /// `MCL_FUTURE` or both.
+        const ONFAULT = linux_raw_sys::general::MCL_ONFAULT;
+        /// Lock all pages which will become mapped into the address space of
+        /// the process in the future. These could be, for instance, new pages
+        /// required by a growing heap and stack as well as new memory-mapped
+        /// files or shared memory regions.
+        const FUTURE = linux_raw_sys::general::MCL_FUTURE;
+        /// Lock all pages which are currently mapped into the address space of
+        /// the process.
+        const CURRENT = linux_raw_sys::general::MCL_CURRENT;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/mod.rs b/vendor/rustix/src/backend/linux_raw/mod.rs
new file mode 100644
index 0000000..0d4e533
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/mod.rs
@@ -0,0 +1,117 @@
+//! The linux_raw backend.
+//!
+//! This makes Linux syscalls directly, without going through libc.
+//!
+//! # Safety
+//!
+//! These files performs raw system calls, and sometimes passes them
+//! uninitialized memory buffers. The signatures in this file are currently
+//! manually maintained and must correspond with the signatures of the actual
+//! Linux syscalls.
+//!
+//! Some of this could be auto-generated from the Linux header file
+//! <linux/syscalls.h>, but we often need more information than it provides,
+//! such as which pointers are array slices, out parameters, or in-out
+//! parameters, which integers are owned or borrowed file descriptors, etc.
+
+#[macro_use]
+mod arch;
+mod conv;
+mod reg;
+#[cfg(any(feature = "time", feature = "process", target_arch = "x86"))]
+mod vdso;
+#[cfg(any(feature = "time", feature = "process", target_arch = "x86"))]
+mod vdso_wrappers;
+
+#[cfg(feature = "event")]
+pub(crate) mod event;
+#[cfg(any(
+    feature = "fs",
+    all(
+        not(feature = "use-libc-auxv"),
+        not(feature = "use-explicitly-provided-auxv"),
+        any(
+            feature = "param",
+            feature = "process",
+            feature = "runtime",
+            feature = "time",
+            target_arch = "x86",
+        )
+    )
+))]
+pub(crate) mod fs;
+pub(crate) mod io;
+#[cfg(feature = "io_uring")]
+pub(crate) mod io_uring;
+#[cfg(feature = "mm")]
+pub(crate) mod mm;
+#[cfg(feature = "mount")]
+pub(crate) mod mount;
+#[cfg(all(feature = "fs", not(feature = "mount")))]
+pub(crate) mod mount; // for deprecated mount functions in "fs"
+#[cfg(feature = "net")]
+pub(crate) mod net;
+#[cfg(any(
+    feature = "param",
+    feature = "process",
+    feature = "runtime",
+    feature = "time",
+    target_arch = "x86",
+))]
+pub(crate) mod param;
+#[cfg(feature = "pipe")]
+pub(crate) mod pipe;
+#[cfg(feature = "process")]
+pub(crate) mod process;
+#[cfg(feature = "pty")]
+pub(crate) mod pty;
+#[cfg(feature = "rand")]
+pub(crate) mod rand;
+#[cfg(feature = "runtime")]
+pub(crate) mod runtime;
+#[cfg(feature = "shm")]
+pub(crate) mod shm;
+#[cfg(feature = "system")]
+pub(crate) mod system;
+#[cfg(feature = "termios")]
+pub(crate) mod termios;
+#[cfg(feature = "thread")]
+pub(crate) mod thread;
+#[cfg(feature = "time")]
+pub(crate) mod time;
+
+pub(crate) mod fd {
+    pub use crate::maybe_polyfill::os::fd::{
+        AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, OwnedFd, RawFd,
+    };
+}
+
+// The linux_raw backend doesn't use actual libc, so we define selected
+// libc-like definitions in a module called `c`.
+pub(crate) mod c;
+
+// Private modules used by multiple public modules.
+#[cfg(any(feature = "procfs", feature = "process", feature = "runtime"))]
+pub(crate) mod pid;
+#[cfg(any(feature = "process", feature = "thread"))]
+pub(crate) mod prctl;
+#[cfg(any(
+    feature = "fs",
+    feature = "process",
+    feature = "thread",
+    all(
+        not(feature = "use-libc-auxv"),
+        not(feature = "use-explicitly-provided-auxv"),
+        any(
+            feature = "param",
+            feature = "runtime",
+            feature = "time",
+            target_arch = "x86",
+        )
+    )
+))]
+pub(crate) mod ugid;
+
+/// The maximum number of buffers that can be passed into a vectored I/O system
+/// call on the current platform.
+const MAX_IOV: usize = linux_raw_sys::general::UIO_MAXIOV as usize;
diff --git a/vendor/rustix/src/backend/linux_raw/mount/mod.rs b/vendor/rustix/src/backend/linux_raw/mount/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/mount/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/mount/syscalls.rs b/vendor/rustix/src/backend/linux_raw/mount/syscalls.rs
new file mode 100644
index 0000000..5cb80cc
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/mount/syscalls.rs
@@ -0,0 +1,239 @@
+//! linux_raw syscalls supporting `rustix::mount`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code)]
+#![allow(clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::conv::ret;
+#[cfg(feature = "mount")]
+use crate::backend::conv::{ret_owned_fd, slice, zero};
+#[cfg(feature = "mount")]
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::ffi::CStr;
+use crate::io;
+
+#[inline]
+pub(crate) fn mount(
+    source: Option<&CStr>,
+    target: &CStr,
+    file_system_type: Option<&CStr>,
+    flags: super::types::MountFlagsArg,
+    data: Option<&CStr>,
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_mount,
+            source,
+            target,
+            file_system_type,
+            flags,
+            data
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn unmount(target: &CStr, flags: super::types::UnmountFlags) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_umount2, target, flags)) }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsopen(fs_name: &CStr, flags: super::types::FsOpenFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_fsopen, fs_name, flags)) }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsmount(
+    fs_fd: BorrowedFd<'_>,
+    flags: super::types::FsMountFlags,
+    attr_flags: super::types::MountAttrFlags,
+) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_fsmount, fs_fd, flags, attr_flags)) }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn move_mount(
+    from_dfd: BorrowedFd<'_>,
+    from_pathname: &CStr,
+    to_dfd: BorrowedFd<'_>,
+    to_pathname: &CStr,
+    flags: super::types::MoveMountFlags,
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_move_mount,
+            from_dfd,
+            from_pathname,
+            to_dfd,
+            to_pathname,
+            flags
+        ))
+    }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn open_tree(
+    dfd: BorrowedFd<'_>,
+    filename: &CStr,
+    flags: super::types::OpenTreeFlags,
+) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_open_tree, dfd, filename, flags)) }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fspick(
+    dfd: BorrowedFd<'_>,
+    path: &CStr,
+    flags: super::types::FsPickFlags,
+) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_fspick, dfd, path, flags)) }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsconfig_set_flag(fs_fd: BorrowedFd<'_>, key: &CStr) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsconfig,
+            fs_fd,
+            super::types::FsConfigCmd::SetFlag,
+            key,
+            zero(),
+            zero()
+        ))
+    }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsconfig_set_string(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    value: &CStr,
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsconfig,
+            fs_fd,
+            super::types::FsConfigCmd::SetString,
+            key,
+            value,
+            zero()
+        ))
+    }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsconfig_set_binary(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    value: &[u8],
+) -> io::Result<()> {
+    let (value_addr, value_len) = slice(value);
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsconfig,
+            fs_fd,
+            super::types::FsConfigCmd::SetBinary,
+            key,
+            value_addr,
+            value_len
+        ))
+    }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsconfig_set_fd(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    fd: BorrowedFd<'_>,
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsconfig,
+            fs_fd,
+            super::types::FsConfigCmd::SetFd,
+            key,
+            zero(),
+            fd
+        ))
+    }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsconfig_set_path(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    path: &CStr,
+    fd: BorrowedFd<'_>,
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsconfig,
+            fs_fd,
+            super::types::FsConfigCmd::SetPath,
+            key,
+            path,
+            fd
+        ))
+    }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsconfig_set_path_empty(
+    fs_fd: BorrowedFd<'_>,
+    key: &CStr,
+    fd: BorrowedFd<'_>,
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsconfig,
+            fs_fd,
+            super::types::FsConfigCmd::SetPathEmpty,
+            key,
+            cstr!(""),
+            fd
+        ))
+    }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsconfig_create(fs_fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsconfig,
+            fs_fd,
+            super::types::FsConfigCmd::Create,
+            zero(),
+            zero(),
+            zero()
+        ))
+    }
+}
+
+#[cfg(feature = "mount")]
+#[inline]
+pub(crate) fn fsconfig_reconfigure(fs_fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fsconfig,
+            fs_fd,
+            super::types::FsConfigCmd::Reconfigure,
+            zero(),
+            zero(),
+            zero()
+        ))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/mount/types.rs b/vendor/rustix/src/backend/linux_raw/mount/types.rs
new file mode 100644
index 0000000..43cb8c0
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/mount/types.rs
@@ -0,0 +1,332 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `MS_*` constants for use with [`mount`].
+    ///
+    /// [`mount`]: crate::mount::mount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MountFlags: c::c_uint {
+        /// `MS_BIND`
+        const BIND = linux_raw_sys::general::MS_BIND;
+
+        /// `MS_DIRSYNC`
+        const DIRSYNC = linux_raw_sys::general::MS_DIRSYNC;
+
+        /// `MS_LAZYTIME`
+        const LAZYTIME = linux_raw_sys::general::MS_LAZYTIME;
+
+        /// `MS_MANDLOCK`
+        #[doc(alias = "MANDLOCK")]
+        const PERMIT_MANDATORY_FILE_LOCKING = linux_raw_sys::general::MS_MANDLOCK;
+
+        /// `MS_NOATIME`
+        const NOATIME = linux_raw_sys::general::MS_NOATIME;
+
+        /// `MS_NODEV`
+        const NODEV = linux_raw_sys::general::MS_NODEV;
+
+        /// `MS_NODIRATIME`
+        const NODIRATIME = linux_raw_sys::general::MS_NODIRATIME;
+
+        /// `MS_NOEXEC`
+        const NOEXEC = linux_raw_sys::general::MS_NOEXEC;
+
+        /// `MS_NOSUID`
+        const NOSUID = linux_raw_sys::general::MS_NOSUID;
+
+        /// `MS_RDONLY`
+        const RDONLY = linux_raw_sys::general::MS_RDONLY;
+
+        /// `MS_REC`
+        const REC = linux_raw_sys::general::MS_REC;
+
+        /// `MS_RELATIME`
+        const RELATIME = linux_raw_sys::general::MS_RELATIME;
+
+        /// `MS_SILENT`
+        const SILENT = linux_raw_sys::general::MS_SILENT;
+
+        /// `MS_STRICTATIME`
+        const STRICTATIME = linux_raw_sys::general::MS_STRICTATIME;
+
+        /// `MS_SYNCHRONOUS`
+        const SYNCHRONOUS = linux_raw_sys::general::MS_SYNCHRONOUS;
+
+        /// `MS_NOSYMFOLLOW`
+        const NOSYMFOLLOW = linux_raw_sys::general::MS_NOSYMFOLLOW;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MNT_*` constants for use with [`unmount`].
+    ///
+    /// [`unmount`]: crate::mount::unmount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct UnmountFlags: c::c_uint {
+        /// `MNT_FORCE`
+        const FORCE = linux_raw_sys::general::MNT_FORCE;
+        /// `MNT_DETACH`
+        const DETACH = linux_raw_sys::general::MNT_DETACH;
+        /// `MNT_EXPIRE`
+        const EXPIRE = linux_raw_sys::general::MNT_EXPIRE;
+        /// `UMOUNT_NOFOLLOW`
+        const NOFOLLOW = linux_raw_sys::general::UMOUNT_NOFOLLOW;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+bitflags! {
+    /// `FSOPEN_*` constants for use with [`fsopen`].
+    ///
+    /// [`fsopen`]: crate::mount::fsopen
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FsOpenFlags: c::c_uint {
+        /// `FSOPEN_CLOEXEC`
+        const FSOPEN_CLOEXEC = linux_raw_sys::general::FSOPEN_CLOEXEC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+bitflags! {
+    /// `FSMOUNT_*` constants for use with [`fsmount`].
+    ///
+    /// [`fsmount`]: crate::mount::fsmount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FsMountFlags: c::c_uint {
+        /// `FSMOUNT_CLOEXEC`
+        const FSMOUNT_CLOEXEC = linux_raw_sys::general::FSMOUNT_CLOEXEC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `FSCONFIG_*` constants for use with the `fsconfig` syscall.
+#[cfg(feature = "mount")]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+#[repr(u32)]
+pub(crate) enum FsConfigCmd {
+    /// `FSCONFIG_SET_FLAG`
+    SetFlag = linux_raw_sys::general::fsconfig_command::FSCONFIG_SET_FLAG as u32,
+
+    /// `FSCONFIG_SET_STRING`
+    SetString = linux_raw_sys::general::fsconfig_command::FSCONFIG_SET_STRING as u32,
+
+    /// `FSCONFIG_SET_BINARY`
+    SetBinary = linux_raw_sys::general::fsconfig_command::FSCONFIG_SET_BINARY as u32,
+
+    /// `FSCONFIG_SET_PATH`
+    SetPath = linux_raw_sys::general::fsconfig_command::FSCONFIG_SET_PATH as u32,
+
+    /// `FSCONFIG_SET_PATH_EMPTY`
+    SetPathEmpty = linux_raw_sys::general::fsconfig_command::FSCONFIG_SET_PATH_EMPTY as u32,
+
+    /// `FSCONFIG_SET_FD`
+    SetFd = linux_raw_sys::general::fsconfig_command::FSCONFIG_SET_FD as u32,
+
+    /// `FSCONFIG_CMD_CREATE`
+    Create = linux_raw_sys::general::fsconfig_command::FSCONFIG_CMD_CREATE as u32,
+
+    /// `FSCONFIG_CMD_RECONFIGURE`
+    Reconfigure = linux_raw_sys::general::fsconfig_command::FSCONFIG_CMD_RECONFIGURE as u32,
+}
+
+#[cfg(feature = "mount")]
+bitflags! {
+    /// `MOUNT_ATTR_*` constants for use with [`fsmount`].
+    ///
+    /// [`fsmount`]: crate::mount::fsmount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MountAttrFlags: c::c_uint {
+        /// `MOUNT_ATTR_RDONLY`
+        const MOUNT_ATTR_RDONLY = linux_raw_sys::general::MOUNT_ATTR_RDONLY;
+
+        /// `MOUNT_ATTR_NOSUID`
+        const MOUNT_ATTR_NOSUID = linux_raw_sys::general::MOUNT_ATTR_NOSUID;
+
+        /// `MOUNT_ATTR_NODEV`
+        const MOUNT_ATTR_NODEV = linux_raw_sys::general::MOUNT_ATTR_NODEV;
+
+        /// `MOUNT_ATTR_NOEXEC`
+        const MOUNT_ATTR_NOEXEC = linux_raw_sys::general::MOUNT_ATTR_NOEXEC;
+
+        /// `MOUNT_ATTR__ATIME`
+        const MOUNT_ATTR__ATIME = linux_raw_sys::general::MOUNT_ATTR__ATIME;
+
+        /// `MOUNT_ATTR_RELATIME`
+        const MOUNT_ATTR_RELATIME = linux_raw_sys::general::MOUNT_ATTR_RELATIME;
+
+        /// `MOUNT_ATTR_NOATIME`
+        const MOUNT_ATTR_NOATIME = linux_raw_sys::general::MOUNT_ATTR_NOATIME;
+
+        /// `MOUNT_ATTR_STRICTATIME`
+        const MOUNT_ATTR_STRICTATIME = linux_raw_sys::general::MOUNT_ATTR_STRICTATIME;
+
+        /// `MOUNT_ATTR_NODIRATIME`
+        const MOUNT_ATTR_NODIRATIME = linux_raw_sys::general::MOUNT_ATTR_NODIRATIME;
+
+        /// `MOUNT_ATTR_NOUSER`
+        const MOUNT_ATTR_IDMAP = linux_raw_sys::general::MOUNT_ATTR_IDMAP;
+
+        /// `MOUNT_ATTR__ATIME_FLAGS`
+        const MOUNT_ATTR_NOSYMFOLLOW = linux_raw_sys::general::MOUNT_ATTR_NOSYMFOLLOW;
+
+        /// `MOUNT_ATTR__ATIME_FLAGS`
+        const MOUNT_ATTR_SIZE_VER0 = linux_raw_sys::general::MOUNT_ATTR_SIZE_VER0;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+bitflags! {
+    /// `MOVE_MOUNT_*` constants for use with [`move_mount`].
+    ///
+    /// [`move_mount`]: crate::mount::move_mount
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MoveMountFlags: c::c_uint {
+        /// `MOVE_MOUNT_F_EMPTY_PATH`
+        const MOVE_MOUNT_F_SYMLINKS = linux_raw_sys::general::MOVE_MOUNT_F_SYMLINKS;
+
+        /// `MOVE_MOUNT_F_AUTOMOUNTS`
+        const MOVE_MOUNT_F_AUTOMOUNTS = linux_raw_sys::general::MOVE_MOUNT_F_AUTOMOUNTS;
+
+        /// `MOVE_MOUNT_F_EMPTY_PATH`
+        const MOVE_MOUNT_F_EMPTY_PATH = linux_raw_sys::general::MOVE_MOUNT_F_EMPTY_PATH;
+
+        /// `MOVE_MOUNT_T_SYMLINKS`
+        const MOVE_MOUNT_T_SYMLINKS = linux_raw_sys::general::MOVE_MOUNT_T_SYMLINKS;
+
+        /// `MOVE_MOUNT_T_AUTOMOUNTS`
+        const MOVE_MOUNT_T_AUTOMOUNTS = linux_raw_sys::general::MOVE_MOUNT_T_AUTOMOUNTS;
+
+        /// `MOVE_MOUNT_T_EMPTY_PATH`
+        const MOVE_MOUNT_T_EMPTY_PATH = linux_raw_sys::general::MOVE_MOUNT_T_EMPTY_PATH;
+
+        /// `MOVE_MOUNT__MASK`
+        const MOVE_MOUNT_SET_GROUP = linux_raw_sys::general::MOVE_MOUNT_SET_GROUP;
+
+        // TODO: add when Linux 6.5 is released
+        // /// `MOVE_MOUNT_BENEATH`
+        // const MOVE_MOUNT_BENEATH = linux_raw_sys::general::MOVE_MOUNT_BENEATH;
+
+        /// `MOVE_MOUNT__MASK`
+        const MOVE_MOUNT__MASK = linux_raw_sys::general::MOVE_MOUNT__MASK;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+bitflags! {
+    /// `OPENTREE_*` constants for use with [`open_tree`].
+    ///
+    /// [`open_tree`]: crate::mount::open_tree
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct OpenTreeFlags: c::c_uint {
+        /// `OPENTREE_CLONE`
+        const OPEN_TREE_CLONE = linux_raw_sys::general::OPEN_TREE_CLONE;
+
+        /// `OPENTREE_CLOEXEC`
+        const OPEN_TREE_CLOEXEC = linux_raw_sys::general::OPEN_TREE_CLOEXEC;
+
+        /// `AT_EMPTY_PATH`
+        const AT_EMPTY_PATH = linux_raw_sys::general::AT_EMPTY_PATH;
+
+        /// `AT_NO_AUTOMOUNT`
+        const AT_NO_AUTOMOUNT = linux_raw_sys::general::AT_NO_AUTOMOUNT;
+
+        /// `AT_RECURSIVE`
+        const AT_RECURSIVE = linux_raw_sys::general::AT_RECURSIVE;
+
+        /// `AT_SYMLINK_NOFOLLOW`
+        const AT_SYMLINK_NOFOLLOW = linux_raw_sys::general::AT_SYMLINK_NOFOLLOW;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[cfg(feature = "mount")]
+bitflags! {
+    /// `FSPICK_*` constants for use with [`fspick`].
+    ///
+    /// [`fspick`]: crate::mount::fspick
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FsPickFlags: c::c_uint {
+        /// `FSPICK_CLOEXEC`
+        const FSPICK_CLOEXEC = linux_raw_sys::general::FSPICK_CLOEXEC;
+
+        /// `FSPICK_SYMLINK_NOFOLLOW`
+        const FSPICK_SYMLINK_NOFOLLOW = linux_raw_sys::general::FSPICK_SYMLINK_NOFOLLOW;
+
+        /// `FSPICK_NO_AUTOMOUNT`
+        const FSPICK_NO_AUTOMOUNT = linux_raw_sys::general::FSPICK_NO_AUTOMOUNT;
+
+        /// `FSPICK_EMPTY_PATH`
+        const FSPICK_EMPTY_PATH = linux_raw_sys::general::FSPICK_EMPTY_PATH;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MS_*` constants for use with [`mount_change`].
+    ///
+    /// [`mount_change`]: crate::mount::mount_change
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct MountPropagationFlags: c::c_uint {
+        /// `MS_SILENT`
+        const SILENT = linux_raw_sys::general::MS_SILENT;
+        /// `MS_SHARED`
+        const SHARED = linux_raw_sys::general::MS_SHARED;
+        /// `MS_PRIVATE`
+        const PRIVATE = linux_raw_sys::general::MS_PRIVATE;
+        /// `MS_SLAVE`
+        const SLAVE = linux_raw_sys::general::MS_SLAVE;
+        /// `MS_UNBINDABLE`
+        const UNBINDABLE = linux_raw_sys::general::MS_UNBINDABLE;
+        /// `MS_REC`
+        const REC = linux_raw_sys::general::MS_REC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub(crate) struct InternalMountFlags: c::c_uint {
+        const REMOUNT = linux_raw_sys::general::MS_REMOUNT;
+        const MOVE = linux_raw_sys::general::MS_MOVE;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+#[repr(transparent)]
+pub(crate) struct MountFlagsArg(pub(crate) c::c_uint);
diff --git a/vendor/rustix/src/backend/linux_raw/net/addr.rs b/vendor/rustix/src/backend/linux_raw/net/addr.rs
new file mode 100644
index 0000000..85ba875
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/addr.rs
@@ -0,0 +1,178 @@
+//! Socket address utilities.
+//!
+//! # Safety
+//!
+//! This file uses `CStr::from_bytes_with_nul_unchecked` on a string it knows
+//! to be NUL-terminated.
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+use crate::ffi::CStr;
+use crate::{io, path};
+use core::cmp::Ordering;
+use core::fmt;
+use core::hash::{Hash, Hasher};
+use core::slice;
+
+/// `struct sockaddr_un`
+#[derive(Clone)]
+#[doc(alias = "sockaddr_un")]
+pub struct SocketAddrUnix {
+    pub(crate) unix: c::sockaddr_un,
+    len: c::socklen_t,
+}
+
+impl SocketAddrUnix {
+    /// Construct a new Unix-domain address from a filesystem path.
+    #[inline]
+    pub fn new<P: path::Arg>(path: P) -> io::Result<Self> {
+        path.into_with_c_str(Self::_new)
+    }
+
+    #[inline]
+    fn _new(path: &CStr) -> io::Result<Self> {
+        let mut unix = Self::init();
+        let bytes = path.to_bytes_with_nul();
+        if bytes.len() > unix.sun_path.len() {
+            return Err(io::Errno::NAMETOOLONG);
+        }
+        for (i, b) in bytes.iter().enumerate() {
+            unix.sun_path[i] = *b as _;
+        }
+        let len = offsetof_sun_path() + bytes.len();
+        let len = len.try_into().unwrap();
+        Ok(Self { unix, len })
+    }
+
+    /// Construct a new abstract Unix-domain address from a byte slice.
+    #[inline]
+    pub fn new_abstract_name(name: &[u8]) -> io::Result<Self> {
+        let mut unix = Self::init();
+        let id = &mut unix.sun_path[1..];
+
+        // SAFETY: Convert `&mut [c_char]` to `&mut [u8]`.
+        let id = unsafe { slice::from_raw_parts_mut(id.as_mut_ptr().cast::<u8>(), id.len()) };
+
+        if let Some(id) = id.get_mut(..name.len()) {
+            id.copy_from_slice(name);
+            let len = offsetof_sun_path() + 1 + name.len();
+            let len = len.try_into().unwrap();
+            Ok(Self { unix, len })
+        } else {
+            Err(io::Errno::NAMETOOLONG)
+        }
+    }
+
+    const fn init() -> c::sockaddr_un {
+        c::sockaddr_un {
+            sun_family: c::AF_UNIX as _,
+            sun_path: [0; 108],
+        }
+    }
+
+    /// For a filesystem path address, return the path.
+    #[inline]
+    pub fn path(&self) -> Option<&CStr> {
+        let len = self.len();
+        if len != 0 && self.unix.sun_path[0] as u8 != b'\0' {
+            let end = len as usize - offsetof_sun_path();
+            let bytes = &self.unix.sun_path[..end];
+
+            // SAFETY: Convert `&[c_char]` to `&[u8]`.
+            let bytes = unsafe { slice::from_raw_parts(bytes.as_ptr().cast::<u8>(), bytes.len()) };
+
+            // SAFETY: `from_bytes_with_nul_unchecked` since the string is
+            // NUL-terminated.
+            unsafe { Some(CStr::from_bytes_with_nul_unchecked(bytes)) }
+        } else {
+            None
+        }
+    }
+
+    /// For an abstract address, return the identifier.
+    #[inline]
+    pub fn abstract_name(&self) -> Option<&[u8]> {
+        let len = self.len();
+        if len != 0 && self.unix.sun_path[0] as u8 == b'\0' {
+            let end = len as usize - offsetof_sun_path();
+            let bytes = &self.unix.sun_path[1..end];
+
+            // SAFETY: Convert `&[c_char]` to `&[u8]`.
+            let bytes = unsafe { slice::from_raw_parts(bytes.as_ptr().cast::<u8>(), bytes.len()) };
+
+            Some(bytes)
+        } else {
+            None
+        }
+    }
+
+    #[inline]
+    pub(crate) fn addr_len(&self) -> c::socklen_t {
+        self.len
+    }
+
+    #[inline]
+    pub(crate) fn len(&self) -> usize {
+        self.addr_len() as usize
+    }
+}
+
+impl PartialEq for SocketAddrUnix {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        let self_len = self.len() - offsetof_sun_path();
+        let other_len = other.len() - offsetof_sun_path();
+        self.unix.sun_path[..self_len].eq(&other.unix.sun_path[..other_len])
+    }
+}
+
+impl Eq for SocketAddrUnix {}
+
+impl PartialOrd for SocketAddrUnix {
+    #[inline]
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for SocketAddrUnix {
+    #[inline]
+    fn cmp(&self, other: &Self) -> Ordering {
+        let self_len = self.len() - offsetof_sun_path();
+        let other_len = other.len() - offsetof_sun_path();
+        self.unix.sun_path[..self_len].cmp(&other.unix.sun_path[..other_len])
+    }
+}
+
+impl Hash for SocketAddrUnix {
+    #[inline]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        let self_len = self.len() - offsetof_sun_path();
+        self.unix.sun_path[..self_len].hash(state)
+    }
+}
+
+impl fmt::Debug for SocketAddrUnix {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if let Some(path) = self.path() {
+            path.fmt(fmt)
+        } else if let Some(name) = self.abstract_name() {
+            name.fmt(fmt)
+        } else {
+            "(unnamed)".fmt(fmt)
+        }
+    }
+}
+
+/// `struct sockaddr_storage` as a raw struct.
+pub type SocketAddrStorage = c::sockaddr;
+
+/// Return the offset of the `sun_path` field of `sockaddr_un`.
+#[inline]
+pub(crate) fn offsetof_sun_path() -> usize {
+    let z = c::sockaddr_un {
+        sun_family: 0_u16,
+        sun_path: [0; 108],
+    };
+    (crate::utils::as_ptr(&z.sun_path) as usize) - (crate::utils::as_ptr(&z) as usize)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/net/mod.rs b/vendor/rustix/src/backend/linux_raw/net/mod.rs
new file mode 100644
index 0000000..f83c546
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/mod.rs
@@ -0,0 +1,7 @@
+pub(crate) mod addr;
+pub(crate) mod msghdr;
+pub(crate) mod read_sockaddr;
+pub(crate) mod send_recv;
+pub(crate) mod sockopt;
+pub(crate) mod syscalls;
+pub(crate) mod write_sockaddr;
diff --git a/vendor/rustix/src/backend/linux_raw/net/msghdr.rs b/vendor/rustix/src/backend/linux_raw/net/msghdr.rs
new file mode 100644
index 0000000..2b88bfb
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/msghdr.rs
@@ -0,0 +1,146 @@
+//! Utilities for dealing with message headers.
+//!
+//! These take closures rather than returning a `c::msghdr` directly because
+//! the message headers may reference stack-local data.
+
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+use crate::backend::net::write_sockaddr::{encode_sockaddr_v4, encode_sockaddr_v6};
+
+use crate::io::{self, IoSlice, IoSliceMut};
+use crate::net::{RecvAncillaryBuffer, SendAncillaryBuffer, SocketAddrV4, SocketAddrV6};
+use crate::utils::as_ptr;
+
+use core::mem::{size_of, MaybeUninit};
+use core::ptr::null_mut;
+
+fn msg_iov_len(len: usize) -> c::size_t {
+    // This cast cannot overflow.
+    len as c::size_t
+}
+
+pub(crate) fn msg_control_len(len: usize) -> c::size_t {
+    // Same as above.
+    len as c::size_t
+}
+
+/// Create a message header intended to receive a datagram.
+pub(crate) fn with_recv_msghdr<R>(
+    name: &mut MaybeUninit<c::sockaddr_storage>,
+    iov: &mut [IoSliceMut<'_>],
+    control: &mut RecvAncillaryBuffer<'_>,
+    f: impl FnOnce(&mut c::msghdr) -> io::Result<R>,
+) -> io::Result<R> {
+    control.clear();
+
+    let namelen = size_of::<c::sockaddr_storage>() as c::c_int;
+    let mut msghdr = c::msghdr {
+        msg_name: name.as_mut_ptr().cast(),
+        msg_namelen: namelen,
+        msg_iov: iov.as_mut_ptr().cast(),
+        msg_iovlen: msg_iov_len(iov.len()),
+        msg_control: control.as_control_ptr().cast(),
+        msg_controllen: msg_control_len(control.control_len()),
+        msg_flags: 0,
+    };
+
+    let res = f(&mut msghdr);
+
+    // Reset the control length.
+    if res.is_ok() {
+        unsafe {
+            control.set_control_len(msghdr.msg_controllen.try_into().unwrap_or(usize::MAX));
+        }
+    }
+
+    res
+}
+
+/// Create a message header intended to send without an address.
+pub(crate) fn with_noaddr_msghdr<R>(
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    f: impl FnOnce(c::msghdr) -> R,
+) -> R {
+    f(c::msghdr {
+        msg_name: null_mut(),
+        msg_namelen: 0,
+        msg_iov: iov.as_ptr() as _,
+        msg_iovlen: msg_iov_len(iov.len()),
+        msg_control: control.as_control_ptr().cast(),
+        msg_controllen: msg_control_len(control.control_len()),
+        msg_flags: 0,
+    })
+}
+
+/// Create a message header intended to send with an IPv4 address.
+pub(crate) fn with_v4_msghdr<R>(
+    addr: &SocketAddrV4,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    f: impl FnOnce(c::msghdr) -> R,
+) -> R {
+    let encoded = encode_sockaddr_v4(addr);
+
+    f(c::msghdr {
+        msg_name: as_ptr(&encoded) as _,
+        msg_namelen: size_of::<SocketAddrV4>() as _,
+        msg_iov: iov.as_ptr() as _,
+        msg_iovlen: msg_iov_len(iov.len()),
+        msg_control: control.as_control_ptr().cast(),
+        msg_controllen: msg_control_len(control.control_len()),
+        msg_flags: 0,
+    })
+}
+
+/// Create a message header intended to send with an IPv6 address.
+pub(crate) fn with_v6_msghdr<R>(
+    addr: &SocketAddrV6,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    f: impl FnOnce(c::msghdr) -> R,
+) -> R {
+    let encoded = encode_sockaddr_v6(addr);
+
+    f(c::msghdr {
+        msg_name: as_ptr(&encoded) as _,
+        msg_namelen: size_of::<SocketAddrV6>() as _,
+        msg_iov: iov.as_ptr() as _,
+        msg_iovlen: msg_iov_len(iov.len()),
+        msg_control: control.as_control_ptr().cast(),
+        msg_controllen: msg_control_len(control.control_len()),
+        msg_flags: 0,
+    })
+}
+
+/// Create a message header intended to send with a Unix address.
+pub(crate) fn with_unix_msghdr<R>(
+    addr: &crate::net::SocketAddrUnix,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    f: impl FnOnce(c::msghdr) -> R,
+) -> R {
+    f(c::msghdr {
+        msg_name: as_ptr(&addr.unix) as _,
+        msg_namelen: addr.addr_len() as _,
+        msg_iov: iov.as_ptr() as _,
+        msg_iovlen: msg_iov_len(iov.len()),
+        msg_control: control.as_control_ptr().cast(),
+        msg_controllen: msg_control_len(control.control_len()),
+        msg_flags: 0,
+    })
+}
+
+/// Create a zero-initialized message header struct value.
+pub(crate) fn zero_msghdr() -> c::msghdr {
+    c::msghdr {
+        msg_name: null_mut(),
+        msg_namelen: 0,
+        msg_iov: null_mut(),
+        msg_iovlen: 0,
+        msg_control: null_mut(),
+        msg_controllen: 0,
+        msg_flags: 0,
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/net/read_sockaddr.rs b/vendor/rustix/src/backend/linux_raw/net/read_sockaddr.rs
new file mode 100644
index 0000000..5a91707
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/read_sockaddr.rs
@@ -0,0 +1,195 @@
+//! The BSD sockets API requires us to read the `ss_family` field before we can
+//! interpret the rest of a `sockaddr` produced by the kernel.
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+use crate::io;
+use crate::net::{Ipv4Addr, Ipv6Addr, SocketAddrAny, SocketAddrUnix, SocketAddrV4, SocketAddrV6};
+use core::mem::size_of;
+use core::slice;
+
+// This must match the header of `sockaddr`.
+#[repr(C)]
+struct sockaddr_header {
+    ss_family: u16,
+}
+
+/// Read the `ss_family` field from a socket address returned from the OS.
+///
+/// # Safety
+///
+/// `storage` must point to a valid socket address returned from the OS.
+#[inline]
+unsafe fn read_ss_family(storage: *const c::sockaddr) -> u16 {
+    // Assert that we know the layout of `sockaddr`.
+    let _ = c::sockaddr {
+        __storage: c::sockaddr_storage {
+            __bindgen_anon_1: linux_raw_sys::net::__kernel_sockaddr_storage__bindgen_ty_1 {
+                __bindgen_anon_1:
+                    linux_raw_sys::net::__kernel_sockaddr_storage__bindgen_ty_1__bindgen_ty_1 {
+                        ss_family: 0_u16,
+                        __data: [0; 126_usize],
+                    },
+            },
+        },
+    };
+
+    (*storage.cast::<sockaddr_header>()).ss_family
+}
+
+/// Set the `ss_family` field of a socket address to `AF_UNSPEC`, so that we
+/// can test for `AF_UNSPEC` to test whether it was stored to.
+#[inline]
+pub(crate) unsafe fn initialize_family_to_unspec(storage: *mut c::sockaddr) {
+    (*storage.cast::<sockaddr_header>()).ss_family = c::AF_UNSPEC as _;
+}
+
+/// Read a socket address encoded in a platform-specific format.
+///
+/// # Safety
+///
+/// `storage` must point to valid socket address storage.
+pub(crate) unsafe fn read_sockaddr(
+    storage: *const c::sockaddr,
+    len: usize,
+) -> io::Result<SocketAddrAny> {
+    let offsetof_sun_path = super::addr::offsetof_sun_path();
+
+    if len < size_of::<c::sa_family_t>() {
+        return Err(io::Errno::INVAL);
+    }
+    match read_ss_family(storage).into() {
+        c::AF_INET => {
+            if len < size_of::<c::sockaddr_in>() {
+                return Err(io::Errno::INVAL);
+            }
+            let decode = &*storage.cast::<c::sockaddr_in>();
+            Ok(SocketAddrAny::V4(SocketAddrV4::new(
+                Ipv4Addr::from(u32::from_be(decode.sin_addr.s_addr)),
+                u16::from_be(decode.sin_port),
+            )))
+        }
+        c::AF_INET6 => {
+            if len < size_of::<c::sockaddr_in6>() {
+                return Err(io::Errno::INVAL);
+            }
+            let decode = &*storage.cast::<c::sockaddr_in6>();
+            Ok(SocketAddrAny::V6(SocketAddrV6::new(
+                Ipv6Addr::from(decode.sin6_addr.in6_u.u6_addr8),
+                u16::from_be(decode.sin6_port),
+                u32::from_be(decode.sin6_flowinfo),
+                decode.sin6_scope_id,
+            )))
+        }
+        c::AF_UNIX => {
+            if len < offsetof_sun_path {
+                return Err(io::Errno::INVAL);
+            }
+            if len == offsetof_sun_path {
+                Ok(SocketAddrAny::Unix(SocketAddrUnix::new(&[][..])?))
+            } else {
+                let decode = &*storage.cast::<c::sockaddr_un>();
+
+                // On Linux check for Linux's [abstract namespace].
+                //
+                // [abstract namespace]: https://man7.org/linux/man-pages/man7/unix.7.html
+                if decode.sun_path[0] == 0 {
+                    let bytes = &decode.sun_path[1..len - offsetof_sun_path];
+
+                    // SAFETY: Convert `&[c_char]` to `&[u8]`.
+                    let bytes = slice::from_raw_parts(bytes.as_ptr().cast::<u8>(), bytes.len());
+
+                    return SocketAddrUnix::new_abstract_name(bytes).map(SocketAddrAny::Unix);
+                }
+
+                // Otherwise we expect a NUL-terminated filesystem path.
+                let bytes = &decode.sun_path[..len - 1 - offsetof_sun_path];
+
+                // SAFETY: Convert `&[c_char]` to `&[u8]`.
+                let bytes = slice::from_raw_parts(bytes.as_ptr().cast::<u8>(), bytes.len());
+
+                assert_eq!(decode.sun_path[len - 1 - offsetof_sun_path], 0);
+                Ok(SocketAddrAny::Unix(SocketAddrUnix::new(bytes)?))
+            }
+        }
+        _ => Err(io::Errno::NOTSUP),
+    }
+}
+
+/// Read an optional socket address returned from the OS.
+///
+/// # Safety
+///
+/// `storage` must point to a valid socket address returned from the OS.
+pub(crate) unsafe fn maybe_read_sockaddr_os(
+    storage: *const c::sockaddr,
+    len: usize,
+) -> Option<SocketAddrAny> {
+    if len == 0 {
+        None
+    } else {
+        Some(read_sockaddr_os(storage, len))
+    }
+}
+
+/// Read a socket address returned from the OS.
+///
+/// # Safety
+///
+/// `storage` must point to a valid socket address returned from the OS.
+pub(crate) unsafe fn read_sockaddr_os(storage: *const c::sockaddr, len: usize) -> SocketAddrAny {
+    let offsetof_sun_path = super::addr::offsetof_sun_path();
+
+    assert!(len >= size_of::<c::sa_family_t>());
+    match read_ss_family(storage).into() {
+        c::AF_INET => {
+            assert!(len >= size_of::<c::sockaddr_in>());
+            let decode = &*storage.cast::<c::sockaddr_in>();
+            SocketAddrAny::V4(SocketAddrV4::new(
+                Ipv4Addr::from(u32::from_be(decode.sin_addr.s_addr)),
+                u16::from_be(decode.sin_port),
+            ))
+        }
+        c::AF_INET6 => {
+            assert!(len >= size_of::<c::sockaddr_in6>());
+            let decode = &*storage.cast::<c::sockaddr_in6>();
+            SocketAddrAny::V6(SocketAddrV6::new(
+                Ipv6Addr::from(decode.sin6_addr.in6_u.u6_addr8),
+                u16::from_be(decode.sin6_port),
+                u32::from_be(decode.sin6_flowinfo),
+                decode.sin6_scope_id,
+            ))
+        }
+        c::AF_UNIX => {
+            assert!(len >= offsetof_sun_path);
+            if len == offsetof_sun_path {
+                SocketAddrAny::Unix(SocketAddrUnix::new(&[][..]).unwrap())
+            } else {
+                let decode = &*storage.cast::<c::sockaddr_un>();
+
+                // On Linux check for Linux's [abstract namespace].
+                //
+                // [abstract namespace]: https://man7.org/linux/man-pages/man7/unix.7.html
+                if decode.sun_path[0] == 0 {
+                    let bytes = &decode.sun_path[1..len - offsetof_sun_path];
+
+                    // SAFETY: Convert `&[c_char]` to `&[u8]`.
+                    let bytes = slice::from_raw_parts(bytes.as_ptr().cast::<u8>(), bytes.len());
+
+                    return SocketAddrAny::Unix(SocketAddrUnix::new_abstract_name(bytes).unwrap());
+                }
+
+                // Otherwise we expect a NUL-terminated filesystem path.
+                assert_eq!(decode.sun_path[len - 1 - offsetof_sun_path], 0);
+
+                let bytes = &decode.sun_path[..len - 1 - offsetof_sun_path];
+
+                // SAFETY: Convert `&[c_char]` to `&[u8]`.
+                let bytes = slice::from_raw_parts(bytes.as_ptr().cast::<u8>(), bytes.len());
+
+                SocketAddrAny::Unix(SocketAddrUnix::new(bytes).unwrap())
+            }
+        }
+        other => unimplemented!("{:?}", other),
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/net/send_recv.rs b/vendor/rustix/src/backend/linux_raw/net/send_recv.rs
new file mode 100644
index 0000000..d5cdd07
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/send_recv.rs
@@ -0,0 +1,60 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `MSG_*` flags for use with [`send`], [`send_to`], and related
+    /// functions.
+    ///
+    /// [`send`]: crate::net::send
+    /// [`sendto`]: crate::net::sendto
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct SendFlags: u32 {
+        /// `MSG_CONFIRM`
+        const CONFIRM = c::MSG_CONFIRM;
+        /// `MSG_DONTROUTE`
+        const DONTROUTE = c::MSG_DONTROUTE;
+        /// `MSG_DONTWAIT`
+        const DONTWAIT = c::MSG_DONTWAIT;
+        /// `MSG_EOT`
+        const EOT = c::MSG_EOR;
+        /// `MSG_MORE`
+        const MORE = c::MSG_MORE;
+        /// `MSG_NOSIGNAL`
+        const NOSIGNAL = c::MSG_NOSIGNAL;
+        /// `MSG_OOB`
+        const OOB = c::MSG_OOB;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `MSG_*` flags for use with [`recv`], [`recvfrom`], and related
+    /// functions.
+    ///
+    /// [`recv`]: crate::net::recv
+    /// [`recvfrom`]: crate::net::recvfrom
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct RecvFlags: u32 {
+        /// `MSG_CMSG_CLOEXEC`
+        const CMSG_CLOEXEC = c::MSG_CMSG_CLOEXEC;
+        /// `MSG_DONTWAIT`
+        const DONTWAIT = c::MSG_DONTWAIT;
+        /// `MSG_ERRQUEUE`
+        const ERRQUEUE = c::MSG_ERRQUEUE;
+        /// `MSG_OOB`
+        const OOB = c::MSG_OOB;
+        /// `MSG_PEEK`
+        const PEEK = c::MSG_PEEK;
+        /// `MSG_TRUNC`
+        const TRUNC = c::MSG_TRUNC;
+        /// `MSG_WAITALL`
+        const WAITALL = c::MSG_WAITALL;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/net/sockopt.rs b/vendor/rustix/src/backend/linux_raw/net/sockopt.rs
new file mode 100644
index 0000000..6a740bb
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/sockopt.rs
@@ -0,0 +1,879 @@
+//! linux_raw syscalls supporting `rustix::net::sockopt`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+use crate::backend::conv::{by_mut, c_uint, ret, socklen_t};
+use crate::fd::BorrowedFd;
+#[cfg(feature = "alloc")]
+use crate::ffi::CStr;
+use crate::io;
+use crate::net::sockopt::Timeout;
+use crate::net::{
+    AddressFamily, Ipv4Addr, Ipv6Addr, Protocol, RawProtocol, SocketAddrAny, SocketAddrStorage,
+    SocketAddrV4, SocketAddrV6, SocketType, UCred,
+};
+#[cfg(feature = "alloc")]
+use alloc::borrow::ToOwned;
+#[cfg(feature = "alloc")]
+use alloc::string::String;
+use core::mem::MaybeUninit;
+use core::time::Duration;
+use linux_raw_sys::general::{__kernel_old_timeval, __kernel_sock_timeval};
+#[cfg(target_arch = "x86")]
+use {
+    crate::backend::conv::{slice_just_addr, x86_sys},
+    crate::backend::reg::{ArgReg, SocketArg},
+    linux_raw_sys::net::{SYS_GETSOCKOPT, SYS_SETSOCKOPT},
+};
+
+#[inline]
+fn getsockopt<T: Copy>(fd: BorrowedFd<'_>, level: u32, optname: u32) -> io::Result<T> {
+    let mut optlen: c::socklen_t = core::mem::size_of::<T>().try_into().unwrap();
+    debug_assert!(
+        optlen as usize >= core::mem::size_of::<c::c_int>(),
+        "Socket APIs don't ever use `bool` directly"
+    );
+
+    let mut value = MaybeUninit::<T>::uninit();
+    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
+
+    assert_eq!(
+        optlen as usize,
+        core::mem::size_of::<T>(),
+        "unexpected getsockopt size"
+    );
+
+    unsafe { Ok(value.assume_init()) }
+}
+
+#[inline]
+fn getsockopt_raw<T>(
+    fd: BorrowedFd<'_>,
+    level: u32,
+    optname: u32,
+    value: &mut MaybeUninit<T>,
+    optlen: &mut c::socklen_t,
+) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall!(
+            __NR_getsockopt,
+            fd,
+            c_uint(level),
+            c_uint(optname),
+            value,
+            by_mut(optlen)
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall!(
+            __NR_socketcall,
+            x86_sys(SYS_GETSOCKOPT),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                c_uint(level),
+                c_uint(optname),
+                value.into(),
+                by_mut(optlen),
+            ])
+        ))
+    }
+}
+
+#[inline]
+fn setsockopt<T: Copy>(fd: BorrowedFd<'_>, level: u32, optname: u32, value: T) -> io::Result<()> {
+    let optlen = core::mem::size_of::<T>().try_into().unwrap();
+    debug_assert!(
+        optlen as usize >= core::mem::size_of::<c::c_int>(),
+        "Socket APIs don't ever use `bool` directly"
+    );
+    setsockopt_raw(fd, level, optname, &value, optlen)
+}
+
+#[inline]
+fn setsockopt_raw<T>(
+    fd: BorrowedFd<'_>,
+    level: u32,
+    optname: u32,
+    ptr: *const T,
+    optlen: c::socklen_t,
+) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_setsockopt,
+            fd,
+            c_uint(level),
+            c_uint(optname),
+            ptr,
+            socklen_t(optlen)
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_SETSOCKOPT),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                c_uint(level),
+                c_uint(optname),
+                ptr.into(),
+                socklen_t(optlen),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn get_socket_type(fd: BorrowedFd<'_>) -> io::Result<SocketType> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_TYPE)
+}
+
+#[inline]
+pub(crate) fn set_socket_reuseaddr(fd: BorrowedFd<'_>, reuseaddr: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_REUSEADDR, from_bool(reuseaddr))
+}
+
+#[inline]
+pub(crate) fn get_socket_reuseaddr(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_REUSEADDR).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_broadcast(fd: BorrowedFd<'_>, broadcast: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_BROADCAST, from_bool(broadcast))
+}
+
+#[inline]
+pub(crate) fn get_socket_broadcast(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_BROADCAST).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_linger(fd: BorrowedFd<'_>, linger: Option<Duration>) -> io::Result<()> {
+    // Convert `linger` to seconds, rounding up.
+    let l_linger = if let Some(linger) = linger {
+        duration_to_secs(linger)?
+    } else {
+        0
+    };
+    let linger = c::linger {
+        l_onoff: c::c_int::from(linger.is_some()),
+        l_linger,
+    };
+    setsockopt(fd, c::SOL_SOCKET, c::SO_LINGER, linger)
+}
+
+#[inline]
+pub(crate) fn get_socket_linger(fd: BorrowedFd<'_>) -> io::Result<Option<Duration>> {
+    let linger: c::linger = getsockopt(fd, c::SOL_SOCKET, c::SO_LINGER)?;
+    Ok((linger.l_onoff != 0).then(|| Duration::from_secs(linger.l_linger as u64)))
+}
+
+#[inline]
+pub(crate) fn set_socket_passcred(fd: BorrowedFd<'_>, passcred: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_PASSCRED, from_bool(passcred))
+}
+
+#[inline]
+pub(crate) fn get_socket_passcred(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_PASSCRED).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_timeout(
+    fd: BorrowedFd<'_>,
+    id: Timeout,
+    timeout: Option<Duration>,
+) -> io::Result<()> {
+    let time = duration_to_linux_sock_timeval(timeout)?;
+    let optname = match id {
+        Timeout::Recv => c::SO_RCVTIMEO_NEW,
+        Timeout::Send => c::SO_SNDTIMEO_NEW,
+    };
+    match setsockopt(fd, c::SOL_SOCKET, optname, time) {
+        Err(io::Errno::NOPROTOOPT) if c::SO_RCVTIMEO_NEW != c::SO_RCVTIMEO_OLD => {
+            set_socket_timeout_old(fd, id, timeout)
+        }
+        otherwise => otherwise,
+    }
+}
+
+/// Same as `set_socket_timeout` but uses `__kernel_old_timeval` instead of
+/// `__kernel_sock_timeval` and `_OLD` constants instead of `_NEW`.
+fn set_socket_timeout_old(
+    fd: BorrowedFd<'_>,
+    id: Timeout,
+    timeout: Option<Duration>,
+) -> io::Result<()> {
+    let time = duration_to_linux_old_timeval(timeout)?;
+    let optname = match id {
+        Timeout::Recv => c::SO_RCVTIMEO_OLD,
+        Timeout::Send => c::SO_SNDTIMEO_OLD,
+    };
+    setsockopt(fd, c::SOL_SOCKET, optname, time)
+}
+
+#[inline]
+pub(crate) fn get_socket_timeout(fd: BorrowedFd<'_>, id: Timeout) -> io::Result<Option<Duration>> {
+    let optname = match id {
+        Timeout::Recv => c::SO_RCVTIMEO_NEW,
+        Timeout::Send => c::SO_SNDTIMEO_NEW,
+    };
+    let time: __kernel_sock_timeval = match getsockopt(fd, c::SOL_SOCKET, optname) {
+        Err(io::Errno::NOPROTOOPT) if c::SO_RCVTIMEO_NEW != c::SO_RCVTIMEO_OLD => {
+            return get_socket_timeout_old(fd, id)
+        }
+        otherwise => otherwise?,
+    };
+    Ok(duration_from_linux_sock_timeval(time))
+}
+
+/// Same as `get_socket_timeout` but uses `__kernel_old_timeval` instead of
+/// `__kernel_sock_timeval` and `_OLD` constants instead of `_NEW`.
+fn get_socket_timeout_old(fd: BorrowedFd<'_>, id: Timeout) -> io::Result<Option<Duration>> {
+    let optname = match id {
+        Timeout::Recv => c::SO_RCVTIMEO_OLD,
+        Timeout::Send => c::SO_SNDTIMEO_OLD,
+    };
+    let time: __kernel_old_timeval = getsockopt(fd, c::SOL_SOCKET, optname)?;
+    Ok(duration_from_linux_old_timeval(time))
+}
+
+/// Convert a `__linux_sock_timeval` to a Rust `Option<Duration>`.
+#[inline]
+fn duration_from_linux_sock_timeval(time: __kernel_sock_timeval) -> Option<Duration> {
+    if time.tv_sec == 0 && time.tv_usec == 0 {
+        None
+    } else {
+        Some(Duration::from_secs(time.tv_sec as u64) + Duration::from_micros(time.tv_usec as u64))
+    }
+}
+
+/// Like `duration_from_linux` but uses Linux's old 32-bit
+/// `__kernel_old_timeval`.
+fn duration_from_linux_old_timeval(time: __kernel_old_timeval) -> Option<Duration> {
+    if time.tv_sec == 0 && time.tv_usec == 0 {
+        None
+    } else {
+        Some(Duration::from_secs(time.tv_sec as u64) + Duration::from_micros(time.tv_usec as u64))
+    }
+}
+
+/// Convert a Rust `Option<Duration>` to a `__kernel_sock_timeval`.
+#[inline]
+fn duration_to_linux_sock_timeval(timeout: Option<Duration>) -> io::Result<__kernel_sock_timeval> {
+    Ok(match timeout {
+        Some(timeout) => {
+            if timeout == Duration::ZERO {
+                return Err(io::Errno::INVAL);
+            }
+            // `subsec_micros` rounds down, so we use `subsec_nanos` and
+            // manually round up.
+            let mut timeout = __kernel_sock_timeval {
+                tv_sec: timeout.as_secs().try_into().unwrap_or(i64::MAX),
+                tv_usec: ((timeout.subsec_nanos() + 999) / 1000) as _,
+            };
+            if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
+                timeout.tv_usec = 1;
+            }
+            timeout
+        }
+        None => __kernel_sock_timeval {
+            tv_sec: 0,
+            tv_usec: 0,
+        },
+    })
+}
+
+/// Like `duration_to_linux` but uses Linux's old 32-bit
+/// `__kernel_old_timeval`.
+fn duration_to_linux_old_timeval(timeout: Option<Duration>) -> io::Result<__kernel_old_timeval> {
+    Ok(match timeout {
+        Some(timeout) => {
+            if timeout == Duration::ZERO {
+                return Err(io::Errno::INVAL);
+            }
+
+            // `subsec_micros` rounds down, so we use `subsec_nanos` and
+            // manually round up.
+            let mut timeout = __kernel_old_timeval {
+                tv_sec: timeout.as_secs().try_into().unwrap_or(c::c_long::MAX),
+                tv_usec: ((timeout.subsec_nanos() + 999) / 1000) as _,
+            };
+            if timeout.tv_sec == 0 && timeout.tv_usec == 0 {
+                timeout.tv_usec = 1;
+            }
+            timeout
+        }
+        None => __kernel_old_timeval {
+            tv_sec: 0,
+            tv_usec: 0,
+        },
+    })
+}
+
+#[inline]
+pub(crate) fn get_socket_error(fd: BorrowedFd<'_>) -> io::Result<Result<(), io::Errno>> {
+    let err: c::c_int = getsockopt(fd, c::SOL_SOCKET, c::SO_ERROR)?;
+    Ok(if err == 0 {
+        Ok(())
+    } else {
+        Err(io::Errno::from_raw_os_error(err))
+    })
+}
+
+#[inline]
+pub(crate) fn set_socket_keepalive(fd: BorrowedFd<'_>, keepalive: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_KEEPALIVE, from_bool(keepalive))
+}
+
+#[inline]
+pub(crate) fn get_socket_keepalive(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_KEEPALIVE).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_recv_buffer_size(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> {
+    let size: c::c_int = size.try_into().map_err(|_| io::Errno::INVAL)?;
+    setsockopt(fd, c::SOL_SOCKET, c::SO_RCVBUF, size)
+}
+
+#[inline]
+pub(crate) fn get_socket_recv_buffer_size(fd: BorrowedFd<'_>) -> io::Result<usize> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_RCVBUF).map(|size: u32| size as usize)
+}
+
+#[inline]
+pub(crate) fn set_socket_send_buffer_size(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> {
+    let size: c::c_int = size.try_into().map_err(|_| io::Errno::INVAL)?;
+    setsockopt(fd, c::SOL_SOCKET, c::SO_SNDBUF, size)
+}
+
+#[inline]
+pub(crate) fn get_socket_send_buffer_size(fd: BorrowedFd<'_>) -> io::Result<usize> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_SNDBUF).map(|size: u32| size as usize)
+}
+
+#[inline]
+pub(crate) fn get_socket_domain(fd: BorrowedFd<'_>) -> io::Result<AddressFamily> {
+    let domain: c::c_int = getsockopt(fd, c::SOL_SOCKET, c::SO_DOMAIN)?;
+    Ok(AddressFamily(
+        domain.try_into().map_err(|_| io::Errno::OPNOTSUPP)?,
+    ))
+}
+
+#[inline]
+pub(crate) fn get_socket_acceptconn(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_ACCEPTCONN).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_oobinline(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_OOBINLINE, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_socket_oobinline(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_OOBINLINE).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_socket_reuseport(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_socket_reuseport(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_REUSEPORT).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn get_socket_protocol(fd: BorrowedFd<'_>) -> io::Result<Option<Protocol>> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_PROTOCOL)
+        .map(|raw: u32| RawProtocol::new(raw).map(Protocol::from_raw))
+}
+
+#[inline]
+pub(crate) fn get_socket_cookie(fd: BorrowedFd<'_>) -> io::Result<u64> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_COOKIE)
+}
+
+#[inline]
+pub(crate) fn get_socket_incoming_cpu(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::SOL_SOCKET, c::SO_INCOMING_CPU)
+}
+
+#[inline]
+pub(crate) fn set_socket_incoming_cpu(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
+    setsockopt(fd, c::SOL_SOCKET, c::SO_INCOMING_CPU, value)
+}
+
+#[inline]
+pub(crate) fn set_ip_ttl(fd: BorrowedFd<'_>, ttl: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_TTL, ttl)
+}
+
+#[inline]
+pub(crate) fn get_ip_ttl(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_TTL)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_v6only(fd: BorrowedFd<'_>, only_v6: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_V6ONLY, from_bool(only_v6))
+}
+
+#[inline]
+pub(crate) fn get_ipv6_v6only(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_V6ONLY).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ip_multicast_loop(fd: BorrowedFd<'_>, multicast_loop: bool) -> io::Result<()> {
+    setsockopt(
+        fd,
+        c::IPPROTO_IP,
+        c::IP_MULTICAST_LOOP,
+        from_bool(multicast_loop),
+    )
+}
+
+#[inline]
+pub(crate) fn get_ip_multicast_loop(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_LOOP).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ip_multicast_ttl(fd: BorrowedFd<'_>, multicast_ttl: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_TTL, multicast_ttl)
+}
+
+#[inline]
+pub(crate) fn get_ip_multicast_ttl(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_MULTICAST_TTL)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_multicast_loop(fd: BorrowedFd<'_>, multicast_loop: bool) -> io::Result<()> {
+    setsockopt(
+        fd,
+        c::IPPROTO_IPV6,
+        c::IPV6_MULTICAST_LOOP,
+        from_bool(multicast_loop),
+    )
+}
+
+#[inline]
+pub(crate) fn get_ipv6_multicast_loop(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_MULTICAST_LOOP).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_multicast_hops(fd: BorrowedFd<'_>, multicast_hops: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IPV6_MULTICAST_HOPS, multicast_hops)
+}
+
+#[inline]
+pub(crate) fn get_ipv6_multicast_hops(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_IP, c::IPV6_MULTICAST_HOPS)
+}
+
+#[inline]
+pub(crate) fn set_ip_add_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+) -> io::Result<()> {
+    let mreq = to_ip_mreq(multiaddr, interface);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_MEMBERSHIP, mreq)
+}
+
+#[inline]
+pub(crate) fn set_ip_add_membership_with_ifindex(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    address: &Ipv4Addr,
+    ifindex: i32,
+) -> io::Result<()> {
+    let mreqn = to_ip_mreqn(multiaddr, address, ifindex);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_MEMBERSHIP, mreqn)
+}
+
+#[inline]
+pub(crate) fn set_ip_add_source_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+    sourceaddr: &Ipv4Addr,
+) -> io::Result<()> {
+    let mreq_source = to_imr_source(multiaddr, interface, sourceaddr);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_ADD_SOURCE_MEMBERSHIP, mreq_source)
+}
+
+#[inline]
+pub(crate) fn set_ip_drop_source_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+    sourceaddr: &Ipv4Addr,
+) -> io::Result<()> {
+    let mreq_source = to_imr_source(multiaddr, interface, sourceaddr);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_SOURCE_MEMBERSHIP, mreq_source)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_add_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv6Addr,
+    interface: u32,
+) -> io::Result<()> {
+    let mreq = to_ipv6mr(multiaddr, interface);
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_ADD_MEMBERSHIP, mreq)
+}
+
+#[inline]
+pub(crate) fn set_ip_drop_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+) -> io::Result<()> {
+    let mreq = to_ip_mreq(multiaddr, interface);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_MEMBERSHIP, mreq)
+}
+
+#[inline]
+pub(crate) fn set_ip_drop_membership_with_ifindex(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv4Addr,
+    address: &Ipv4Addr,
+    ifindex: i32,
+) -> io::Result<()> {
+    let mreqn = to_ip_mreqn(multiaddr, address, ifindex);
+    setsockopt(fd, c::IPPROTO_IP, c::IP_DROP_MEMBERSHIP, mreqn)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_drop_membership(
+    fd: BorrowedFd<'_>,
+    multiaddr: &Ipv6Addr,
+    interface: u32,
+) -> io::Result<()> {
+    let mreq = to_ipv6mr(multiaddr, interface);
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_DROP_MEMBERSHIP, mreq)
+}
+
+#[inline]
+pub(crate) fn get_ipv6_unicast_hops(fd: BorrowedFd<'_>) -> io::Result<u8> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_UNICAST_HOPS).map(|hops: c::c_int| hops as u8)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_unicast_hops(fd: BorrowedFd<'_>, hops: Option<u8>) -> io::Result<()> {
+    let hops = match hops {
+        Some(hops) => hops.into(),
+        None => -1,
+    };
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_UNICAST_HOPS, hops)
+}
+
+#[inline]
+pub(crate) fn set_ip_tos(fd: BorrowedFd<'_>, value: u8) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_TOS, i32::from(value))
+}
+
+#[inline]
+pub(crate) fn get_ip_tos(fd: BorrowedFd<'_>) -> io::Result<u8> {
+    let value: i32 = getsockopt(fd, c::IPPROTO_IP, c::IP_TOS)?;
+    Ok(value as u8)
+}
+
+#[inline]
+pub(crate) fn set_ip_recvtos(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_RECVTOS, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_ip_recvtos(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_RECVTOS).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_recvtclass(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_RECVTCLASS, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_ipv6_recvtclass(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_RECVTCLASS).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ip_freebind(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IP, c::IP_FREEBIND, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_ip_freebind(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IP, c::IP_FREEBIND).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_ipv6_freebind(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_FREEBIND, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_ipv6_freebind(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_FREEBIND).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn get_ip_original_dst(fd: BorrowedFd<'_>) -> io::Result<SocketAddrV4> {
+    let level = c::IPPROTO_IP;
+    let optname = c::SO_ORIGINAL_DST;
+    let mut value = MaybeUninit::<SocketAddrStorage>::uninit();
+    let mut optlen = core::mem::size_of_val(&value).try_into().unwrap();
+
+    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
+
+    let any = unsafe { SocketAddrAny::read(value.as_ptr(), optlen as usize)? };
+    match any {
+        SocketAddrAny::V4(v4) => Ok(v4),
+        _ => unreachable!(),
+    }
+}
+
+#[inline]
+pub(crate) fn get_ipv6_original_dst(fd: BorrowedFd<'_>) -> io::Result<SocketAddrV6> {
+    let level = c::IPPROTO_IPV6;
+    let optname = c::IP6T_SO_ORIGINAL_DST;
+    let mut value = MaybeUninit::<SocketAddrStorage>::uninit();
+    let mut optlen = core::mem::size_of_val(&value).try_into().unwrap();
+
+    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
+
+    let any = unsafe { SocketAddrAny::read(value.as_ptr(), optlen as usize)? };
+    match any {
+        SocketAddrAny::V6(v6) => Ok(v6),
+        _ => unreachable!(),
+    }
+}
+
+#[inline]
+pub(crate) fn set_ipv6_tclass(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_IPV6, c::IPV6_TCLASS, value)
+}
+
+#[inline]
+pub(crate) fn get_ipv6_tclass(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_IPV6, c::IPV6_TCLASS)
+}
+
+#[inline]
+pub(crate) fn set_tcp_nodelay(fd: BorrowedFd<'_>, nodelay: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_NODELAY, from_bool(nodelay))
+}
+
+#[inline]
+pub(crate) fn get_tcp_nodelay(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_NODELAY).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_tcp_keepcnt(fd: BorrowedFd<'_>, count: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPCNT, count)
+}
+
+#[inline]
+pub(crate) fn get_tcp_keepcnt(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPCNT)
+}
+
+#[inline]
+pub(crate) fn set_tcp_keepidle(fd: BorrowedFd<'_>, duration: Duration) -> io::Result<()> {
+    let secs: c::c_uint = duration_to_secs(duration)?;
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPIDLE, secs)
+}
+
+#[inline]
+pub(crate) fn get_tcp_keepidle(fd: BorrowedFd<'_>) -> io::Result<Duration> {
+    let secs: c::c_uint = getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPIDLE)?;
+    Ok(Duration::from_secs(secs as u64))
+}
+
+#[inline]
+pub(crate) fn set_tcp_keepintvl(fd: BorrowedFd<'_>, duration: Duration) -> io::Result<()> {
+    let secs: c::c_uint = duration_to_secs(duration)?;
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPINTVL, secs)
+}
+
+#[inline]
+pub(crate) fn get_tcp_keepintvl(fd: BorrowedFd<'_>) -> io::Result<Duration> {
+    let secs: c::c_uint = getsockopt(fd, c::IPPROTO_TCP, c::TCP_KEEPINTVL)?;
+    Ok(Duration::from_secs(secs as u64))
+}
+
+#[inline]
+pub(crate) fn set_tcp_user_timeout(fd: BorrowedFd<'_>, value: u32) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_USER_TIMEOUT, value)
+}
+
+#[inline]
+pub(crate) fn get_tcp_user_timeout(fd: BorrowedFd<'_>) -> io::Result<u32> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_USER_TIMEOUT)
+}
+
+#[inline]
+pub(crate) fn set_tcp_quickack(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_QUICKACK, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_tcp_quickack(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_QUICKACK).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_tcp_congestion(fd: BorrowedFd<'_>, value: &str) -> io::Result<()> {
+    let level = c::IPPROTO_TCP;
+    let optname = c::TCP_CONGESTION;
+    let optlen = value.len().try_into().unwrap();
+    setsockopt_raw(fd, level, optname, value.as_ptr(), optlen)
+}
+
+#[cfg(feature = "alloc")]
+#[inline]
+pub(crate) fn get_tcp_congestion(fd: BorrowedFd<'_>) -> io::Result<String> {
+    let level = c::IPPROTO_TCP;
+    let optname = c::TCP_CONGESTION;
+    const OPTLEN: c::socklen_t = 16;
+    let mut value = MaybeUninit::<[MaybeUninit<u8>; OPTLEN as usize]>::uninit();
+    let mut optlen = OPTLEN;
+    getsockopt_raw(fd, level, optname, &mut value, &mut optlen)?;
+    unsafe {
+        let value = value.assume_init();
+        let slice: &[u8] = core::mem::transmute(&value[..optlen as usize]);
+        assert!(slice.iter().any(|b| *b == b'\0'));
+        Ok(
+            core::str::from_utf8(CStr::from_ptr(slice.as_ptr().cast()).to_bytes())
+                .unwrap()
+                .to_owned(),
+        )
+    }
+}
+
+#[inline]
+pub(crate) fn set_tcp_thin_linear_timeouts(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(
+        fd,
+        c::IPPROTO_TCP,
+        c::TCP_THIN_LINEAR_TIMEOUTS,
+        from_bool(value),
+    )
+}
+
+#[inline]
+pub(crate) fn get_tcp_thin_linear_timeouts(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_THIN_LINEAR_TIMEOUTS).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn set_tcp_cork(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
+    setsockopt(fd, c::IPPROTO_TCP, c::TCP_CORK, from_bool(value))
+}
+
+#[inline]
+pub(crate) fn get_tcp_cork(fd: BorrowedFd<'_>) -> io::Result<bool> {
+    getsockopt(fd, c::IPPROTO_TCP, c::TCP_CORK).map(to_bool)
+}
+
+#[inline]
+pub(crate) fn get_socket_peercred(fd: BorrowedFd<'_>) -> io::Result<UCred> {
+    getsockopt(fd, c::SOL_SOCKET, linux_raw_sys::net::SO_PEERCRED)
+}
+
+#[inline]
+fn to_ip_mreq(multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> c::ip_mreq {
+    c::ip_mreq {
+        imr_multiaddr: to_imr_addr(multiaddr),
+        imr_interface: to_imr_addr(interface),
+    }
+}
+
+#[inline]
+fn to_ip_mreqn(multiaddr: &Ipv4Addr, address: &Ipv4Addr, ifindex: i32) -> c::ip_mreqn {
+    c::ip_mreqn {
+        imr_multiaddr: to_imr_addr(multiaddr),
+        imr_address: to_imr_addr(address),
+        imr_ifindex: ifindex,
+    }
+}
+
+#[inline]
+fn to_imr_source(
+    multiaddr: &Ipv4Addr,
+    interface: &Ipv4Addr,
+    sourceaddr: &Ipv4Addr,
+) -> c::ip_mreq_source {
+    c::ip_mreq_source {
+        imr_multiaddr: to_imr_addr(multiaddr).s_addr,
+        imr_interface: to_imr_addr(interface).s_addr,
+        imr_sourceaddr: to_imr_addr(sourceaddr).s_addr,
+    }
+}
+
+#[inline]
+fn to_imr_addr(addr: &Ipv4Addr) -> c::in_addr {
+    c::in_addr {
+        s_addr: u32::from_ne_bytes(addr.octets()),
+    }
+}
+
+#[inline]
+fn to_ipv6mr(multiaddr: &Ipv6Addr, interface: u32) -> c::ipv6_mreq {
+    c::ipv6_mreq {
+        ipv6mr_multiaddr: to_ipv6mr_multiaddr(multiaddr),
+        ipv6mr_ifindex: to_ipv6mr_interface(interface),
+    }
+}
+
+#[inline]
+fn to_ipv6mr_multiaddr(multiaddr: &Ipv6Addr) -> c::in6_addr {
+    c::in6_addr {
+        in6_u: linux_raw_sys::net::in6_addr__bindgen_ty_1 {
+            u6_addr8: multiaddr.octets(),
+        },
+    }
+}
+
+#[inline]
+fn to_ipv6mr_interface(interface: u32) -> c::c_int {
+    interface as c::c_int
+}
+
+#[inline]
+fn from_bool(value: bool) -> c::c_uint {
+    c::c_uint::from(value)
+}
+
+#[inline]
+fn to_bool(value: c::c_uint) -> bool {
+    value != 0
+}
+
+/// Convert to seconds, rounding up if necessary.
+#[inline]
+fn duration_to_secs<T: TryFrom<u64>>(duration: Duration) -> io::Result<T> {
+    let mut secs = duration.as_secs();
+    if duration.subsec_nanos() != 0 {
+        secs = secs.checked_add(1).ok_or(io::Errno::INVAL)?;
+    }
+    T::try_from(secs).map_err(|_e| io::Errno::INVAL)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/net/syscalls.rs b/vendor/rustix/src/backend/linux_raw/net/syscalls.rs
new file mode 100644
index 0000000..726f022
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/syscalls.rs
@@ -0,0 +1,949 @@
+//! linux_raw syscalls supporting `rustix::net`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use super::msghdr::{
+    with_noaddr_msghdr, with_recv_msghdr, with_unix_msghdr, with_v4_msghdr, with_v6_msghdr,
+};
+use super::read_sockaddr::{initialize_family_to_unspec, maybe_read_sockaddr_os, read_sockaddr_os};
+use super::send_recv::{RecvFlags, SendFlags};
+use super::write_sockaddr::{encode_sockaddr_v4, encode_sockaddr_v6};
+use crate::backend::c;
+use crate::backend::conv::{
+    by_mut, by_ref, c_int, c_uint, pass_usize, ret, ret_owned_fd, ret_usize, size_of, slice,
+    socklen_t, zero,
+};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io::{self, IoSlice, IoSliceMut};
+use crate::net::{
+    AddressFamily, Protocol, RecvAncillaryBuffer, RecvMsgReturn, SendAncillaryBuffer, Shutdown,
+    SocketAddrAny, SocketAddrUnix, SocketAddrV4, SocketAddrV6, SocketFlags, SocketType,
+};
+use c::{sockaddr, sockaddr_in, sockaddr_in6, socklen_t};
+use core::mem::MaybeUninit;
+#[cfg(target_arch = "x86")]
+use {
+    crate::backend::conv::{slice_just_addr, x86_sys},
+    crate::backend::reg::{ArgReg, SocketArg},
+    linux_raw_sys::net::{
+        SYS_ACCEPT, SYS_ACCEPT4, SYS_BIND, SYS_CONNECT, SYS_GETPEERNAME, SYS_GETSOCKNAME,
+        SYS_LISTEN, SYS_RECV, SYS_RECVFROM, SYS_RECVMSG, SYS_SEND, SYS_SENDMSG, SYS_SENDTO,
+        SYS_SHUTDOWN, SYS_SOCKET, SYS_SOCKETPAIR,
+    },
+};
+
+#[inline]
+pub(crate) fn socket(
+    family: AddressFamily,
+    type_: SocketType,
+    protocol: Option<Protocol>,
+) -> io::Result<OwnedFd> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret_owned_fd(syscall_readonly!(__NR_socket, family, type_, protocol))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret_owned_fd(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_SOCKET),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                family.into(),
+                type_.into(),
+                protocol.into(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn socket_with(
+    family: AddressFamily,
+    type_: SocketType,
+    flags: SocketFlags,
+    protocol: Option<Protocol>,
+) -> io::Result<OwnedFd> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret_owned_fd(syscall_readonly!(
+            __NR_socket,
+            family,
+            (type_, flags),
+            protocol
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret_owned_fd(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_SOCKET),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                family.into(),
+                (type_, flags).into(),
+                protocol.into(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn socketpair(
+    family: AddressFamily,
+    type_: SocketType,
+    flags: SocketFlags,
+    protocol: Option<Protocol>,
+) -> io::Result<(OwnedFd, OwnedFd)> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        let mut result = MaybeUninit::<[OwnedFd; 2]>::uninit();
+        ret(syscall!(
+            __NR_socketpair,
+            family,
+            (type_, flags),
+            protocol,
+            &mut result
+        ))?;
+        let [fd0, fd1] = result.assume_init();
+        Ok((fd0, fd1))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        let mut result = MaybeUninit::<[OwnedFd; 2]>::uninit();
+        ret(syscall!(
+            __NR_socketcall,
+            x86_sys(SYS_SOCKETPAIR),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                family.into(),
+                (type_, flags).into(),
+                protocol.into(),
+                (&mut result).into(),
+            ])
+        ))?;
+        let [fd0, fd1] = result.assume_init();
+        Ok((fd0, fd1))
+    }
+}
+
+#[inline]
+pub(crate) fn accept(fd: BorrowedFd<'_>) -> io::Result<OwnedFd> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        let fd = ret_owned_fd(syscall_readonly!(__NR_accept, fd, zero(), zero()))?;
+        Ok(fd)
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        let fd = ret_owned_fd(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_ACCEPT),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[fd.into(), zero(), zero()])
+        ))?;
+        Ok(fd)
+    }
+}
+
+#[inline]
+pub(crate) fn accept_with(fd: BorrowedFd<'_>, flags: SocketFlags) -> io::Result<OwnedFd> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        let fd = ret_owned_fd(syscall_readonly!(__NR_accept4, fd, zero(), zero(), flags))?;
+        Ok(fd)
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        let fd = ret_owned_fd(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_ACCEPT4),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[fd.into(), zero(), zero(), flags.into()])
+        ))?;
+        Ok(fd)
+    }
+}
+
+#[inline]
+pub(crate) fn acceptfrom(fd: BorrowedFd<'_>) -> io::Result<(OwnedFd, Option<SocketAddrAny>)> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+        let mut storage = MaybeUninit::<sockaddr>::uninit();
+        let fd = ret_owned_fd(syscall!(
+            __NR_accept,
+            fd,
+            &mut storage,
+            by_mut(&mut addrlen)
+        ))?;
+        Ok((
+            fd,
+            maybe_read_sockaddr_os(&storage.assume_init(), addrlen.try_into().unwrap()),
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+        let mut storage = MaybeUninit::<sockaddr>::uninit();
+        let fd = ret_owned_fd(syscall!(
+            __NR_socketcall,
+            x86_sys(SYS_ACCEPT),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                (&mut storage).into(),
+                by_mut(&mut addrlen),
+            ])
+        ))?;
+        Ok((
+            fd,
+            maybe_read_sockaddr_os(&storage.assume_init(), addrlen.try_into().unwrap()),
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn acceptfrom_with(
+    fd: BorrowedFd<'_>,
+    flags: SocketFlags,
+) -> io::Result<(OwnedFd, Option<SocketAddrAny>)> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+        let mut storage = MaybeUninit::<sockaddr>::uninit();
+        let fd = ret_owned_fd(syscall!(
+            __NR_accept4,
+            fd,
+            &mut storage,
+            by_mut(&mut addrlen),
+            flags
+        ))?;
+        Ok((
+            fd,
+            maybe_read_sockaddr_os(&storage.assume_init(), addrlen.try_into().unwrap()),
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+        let mut storage = MaybeUninit::<sockaddr>::uninit();
+        let fd = ret_owned_fd(syscall!(
+            __NR_socketcall,
+            x86_sys(SYS_ACCEPT4),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                (&mut storage).into(),
+                by_mut(&mut addrlen),
+                flags.into(),
+            ])
+        ))?;
+        Ok((
+            fd,
+            maybe_read_sockaddr_os(&storage.assume_init(), addrlen.try_into().unwrap()),
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn recvmsg(
+    sockfd: BorrowedFd<'_>,
+    iov: &mut [IoSliceMut<'_>],
+    control: &mut RecvAncillaryBuffer<'_>,
+    msg_flags: RecvFlags,
+) -> io::Result<RecvMsgReturn> {
+    let mut storage = MaybeUninit::<c::sockaddr_storage>::uninit();
+
+    with_recv_msghdr(&mut storage, iov, control, |msghdr| {
+        #[cfg(not(target_arch = "x86"))]
+        let result =
+            unsafe { ret_usize(syscall!(__NR_recvmsg, sockfd, by_mut(msghdr), msg_flags)) };
+
+        #[cfg(target_arch = "x86")]
+        let result = unsafe {
+            ret_usize(syscall!(
+                __NR_socketcall,
+                x86_sys(SYS_RECVMSG),
+                slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                    sockfd.into(),
+                    by_mut(msghdr),
+                    msg_flags.into(),
+                ])
+            ))
+        };
+
+        result.map(|bytes| {
+            // Get the address of the sender, if any.
+            let addr =
+                unsafe { maybe_read_sockaddr_os(msghdr.msg_name as _, msghdr.msg_namelen as _) };
+
+            RecvMsgReturn {
+                bytes,
+                address: addr,
+                flags: RecvFlags::from_bits_retain(msghdr.msg_flags),
+            }
+        })
+    })
+}
+
+#[inline]
+pub(crate) fn sendmsg(
+    sockfd: BorrowedFd<'_>,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    msg_flags: SendFlags,
+) -> io::Result<usize> {
+    with_noaddr_msghdr(iov, control, |msghdr| {
+        #[cfg(not(target_arch = "x86"))]
+        let result =
+            unsafe { ret_usize(syscall!(__NR_sendmsg, sockfd, by_ref(&msghdr), msg_flags)) };
+
+        #[cfg(target_arch = "x86")]
+        let result = unsafe {
+            ret_usize(syscall!(
+                __NR_socketcall,
+                x86_sys(SYS_SENDMSG),
+                slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                    sockfd.into(),
+                    by_ref(&msghdr),
+                    msg_flags.into()
+                ])
+            ))
+        };
+
+        result
+    })
+}
+
+#[inline]
+pub(crate) fn sendmsg_v4(
+    sockfd: BorrowedFd<'_>,
+    addr: &SocketAddrV4,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    msg_flags: SendFlags,
+) -> io::Result<usize> {
+    with_v4_msghdr(addr, iov, control, |msghdr| {
+        #[cfg(not(target_arch = "x86"))]
+        let result =
+            unsafe { ret_usize(syscall!(__NR_sendmsg, sockfd, by_ref(&msghdr), msg_flags)) };
+
+        #[cfg(target_arch = "x86")]
+        let result = unsafe {
+            ret_usize(syscall!(
+                __NR_socketcall,
+                x86_sys(SYS_SENDMSG),
+                slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                    sockfd.into(),
+                    by_ref(&msghdr),
+                    msg_flags.into(),
+                ])
+            ))
+        };
+
+        result
+    })
+}
+
+#[inline]
+pub(crate) fn sendmsg_v6(
+    sockfd: BorrowedFd<'_>,
+    addr: &SocketAddrV6,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    msg_flags: SendFlags,
+) -> io::Result<usize> {
+    with_v6_msghdr(addr, iov, control, |msghdr| {
+        #[cfg(not(target_arch = "x86"))]
+        let result =
+            unsafe { ret_usize(syscall!(__NR_sendmsg, sockfd, by_ref(&msghdr), msg_flags)) };
+
+        #[cfg(target_arch = "x86")]
+        let result = unsafe {
+            ret_usize(syscall!(
+                __NR_socketcall,
+                x86_sys(SYS_SENDMSG),
+                slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                    sockfd.into(),
+                    by_ref(&msghdr),
+                    msg_flags.into()
+                ])
+            ))
+        };
+
+        result
+    })
+}
+
+#[inline]
+pub(crate) fn sendmsg_unix(
+    sockfd: BorrowedFd<'_>,
+    addr: &SocketAddrUnix,
+    iov: &[IoSlice<'_>],
+    control: &mut SendAncillaryBuffer<'_, '_, '_>,
+    msg_flags: SendFlags,
+) -> io::Result<usize> {
+    with_unix_msghdr(addr, iov, control, |msghdr| {
+        #[cfg(not(target_arch = "x86"))]
+        let result =
+            unsafe { ret_usize(syscall!(__NR_sendmsg, sockfd, by_ref(&msghdr), msg_flags)) };
+
+        #[cfg(target_arch = "x86")]
+        let result = unsafe {
+            ret_usize(syscall!(
+                __NR_socketcall,
+                x86_sys(SYS_SENDMSG),
+                slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                    sockfd.into(),
+                    by_ref(&msghdr),
+                    msg_flags.into()
+                ])
+            ))
+        };
+
+        result
+    })
+}
+
+#[inline]
+pub(crate) fn shutdown(fd: BorrowedFd<'_>, how: Shutdown) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_shutdown,
+            fd,
+            c_uint(how as c::c_uint)
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_SHUTDOWN),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[fd.into(), c_uint(how as c::c_uint)])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn send(fd: BorrowedFd<'_>, buf: &[u8], flags: SendFlags) -> io::Result<usize> {
+    let (buf_addr, buf_len) = slice(buf);
+
+    #[cfg(not(any(
+        target_arch = "aarch64",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "riscv64",
+        target_arch = "x86",
+        target_arch = "x86_64",
+    )))]
+    unsafe {
+        ret_usize(syscall_readonly!(__NR_send, fd, buf_addr, buf_len, flags))
+    }
+    #[cfg(any(
+        target_arch = "aarch64",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "riscv64",
+        target_arch = "x86_64",
+    ))]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_sendto,
+            fd,
+            buf_addr,
+            buf_len,
+            flags,
+            zero(),
+            zero()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_SEND),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                buf_addr,
+                buf_len,
+                flags.into()
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn sendto_v4(
+    fd: BorrowedFd<'_>,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrV4,
+) -> io::Result<usize> {
+    let (buf_addr, buf_len) = slice(buf);
+
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_sendto,
+            fd,
+            buf_addr,
+            buf_len,
+            flags,
+            by_ref(&encode_sockaddr_v4(addr)),
+            size_of::<sockaddr_in, _>()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_SENDTO),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                buf_addr,
+                buf_len,
+                flags.into(),
+                by_ref(&encode_sockaddr_v4(addr)),
+                size_of::<sockaddr_in, _>(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn sendto_v6(
+    fd: BorrowedFd<'_>,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrV6,
+) -> io::Result<usize> {
+    let (buf_addr, buf_len) = slice(buf);
+
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_sendto,
+            fd,
+            buf_addr,
+            buf_len,
+            flags,
+            by_ref(&encode_sockaddr_v6(addr)),
+            size_of::<sockaddr_in6, _>()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_SENDTO),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                buf_addr,
+                buf_len,
+                flags.into(),
+                by_ref(&encode_sockaddr_v6(addr)),
+                size_of::<sockaddr_in6, _>(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn sendto_unix(
+    fd: BorrowedFd<'_>,
+    buf: &[u8],
+    flags: SendFlags,
+    addr: &SocketAddrUnix,
+) -> io::Result<usize> {
+    let (buf_addr, buf_len) = slice(buf);
+
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_sendto,
+            fd,
+            buf_addr,
+            buf_len,
+            flags,
+            by_ref(&addr.unix),
+            socklen_t(addr.addr_len())
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret_usize(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_SENDTO),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                buf_addr,
+                buf_len,
+                flags.into(),
+                by_ref(&addr.unix),
+                socklen_t(addr.addr_len()),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn recv(
+    fd: BorrowedFd<'_>,
+    buf: *mut u8,
+    len: usize,
+    flags: RecvFlags,
+) -> io::Result<usize> {
+    #[cfg(not(any(
+        target_arch = "aarch64",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "riscv64",
+        target_arch = "x86",
+        target_arch = "x86_64",
+    )))]
+    {
+        ret_usize(syscall!(__NR_recv, fd, buf, pass_usize(len), flags))
+    }
+    #[cfg(any(
+        target_arch = "aarch64",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "riscv64",
+        target_arch = "x86_64",
+    ))]
+    {
+        ret_usize(syscall!(
+            __NR_recvfrom,
+            fd,
+            buf,
+            pass_usize(len),
+            flags,
+            zero(),
+            zero()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    {
+        ret_usize(syscall!(
+            __NR_socketcall,
+            x86_sys(SYS_RECV),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                buf.into(),
+                pass_usize(len),
+                flags.into(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn recvfrom(
+    fd: BorrowedFd<'_>,
+    buf: *mut u8,
+    len: usize,
+    flags: RecvFlags,
+) -> io::Result<(usize, Option<SocketAddrAny>)> {
+    let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+    let mut storage = MaybeUninit::<sockaddr>::uninit();
+
+    // `recvfrom` does not write to the storage if the socket is
+    // connection-oriented sockets, so we initialize the family field to
+    // `AF_UNSPEC` so that we can detect this case.
+    initialize_family_to_unspec(storage.as_mut_ptr());
+
+    #[cfg(not(target_arch = "x86"))]
+    let nread = ret_usize(syscall!(
+        __NR_recvfrom,
+        fd,
+        buf,
+        pass_usize(len),
+        flags,
+        &mut storage,
+        by_mut(&mut addrlen)
+    ))?;
+    #[cfg(target_arch = "x86")]
+    let nread = ret_usize(syscall!(
+        __NR_socketcall,
+        x86_sys(SYS_RECVFROM),
+        slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+            fd.into(),
+            buf.into(),
+            pass_usize(len),
+            flags.into(),
+            (&mut storage).into(),
+            by_mut(&mut addrlen),
+        ])
+    ))?;
+
+    Ok((
+        nread,
+        maybe_read_sockaddr_os(&storage.assume_init(), addrlen.try_into().unwrap()),
+    ))
+}
+
+#[inline]
+pub(crate) fn getpeername(fd: BorrowedFd<'_>) -> io::Result<Option<SocketAddrAny>> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+        let mut storage = MaybeUninit::<sockaddr>::uninit();
+        ret(syscall!(
+            __NR_getpeername,
+            fd,
+            &mut storage,
+            by_mut(&mut addrlen)
+        ))?;
+        Ok(maybe_read_sockaddr_os(
+            &storage.assume_init(),
+            addrlen.try_into().unwrap(),
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+        let mut storage = MaybeUninit::<sockaddr>::uninit();
+        ret(syscall!(
+            __NR_socketcall,
+            x86_sys(SYS_GETPEERNAME),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                (&mut storage).into(),
+                by_mut(&mut addrlen),
+            ])
+        ))?;
+        Ok(maybe_read_sockaddr_os(
+            &storage.assume_init(),
+            addrlen.try_into().unwrap(),
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn getsockname(fd: BorrowedFd<'_>) -> io::Result<SocketAddrAny> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+        let mut storage = MaybeUninit::<sockaddr>::uninit();
+        ret(syscall!(
+            __NR_getsockname,
+            fd,
+            &mut storage,
+            by_mut(&mut addrlen)
+        ))?;
+        Ok(read_sockaddr_os(
+            &storage.assume_init(),
+            addrlen.try_into().unwrap(),
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        let mut addrlen = core::mem::size_of::<sockaddr>() as socklen_t;
+        let mut storage = MaybeUninit::<sockaddr>::uninit();
+        ret(syscall!(
+            __NR_socketcall,
+            x86_sys(SYS_GETSOCKNAME),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                (&mut storage).into(),
+                by_mut(&mut addrlen),
+            ])
+        ))?;
+        Ok(read_sockaddr_os(
+            &storage.assume_init(),
+            addrlen.try_into().unwrap(),
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn bind_v4(fd: BorrowedFd<'_>, addr: &SocketAddrV4) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_bind,
+            fd,
+            by_ref(&encode_sockaddr_v4(addr)),
+            size_of::<sockaddr_in, _>()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_BIND),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                by_ref(&encode_sockaddr_v4(addr)),
+                size_of::<sockaddr_in, _>(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn bind_v6(fd: BorrowedFd<'_>, addr: &SocketAddrV6) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_bind,
+            fd,
+            by_ref(&encode_sockaddr_v6(addr)),
+            size_of::<sockaddr_in6, _>()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_BIND),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                by_ref(&encode_sockaddr_v6(addr)),
+                size_of::<sockaddr_in6, _>(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn bind_unix(fd: BorrowedFd<'_>, addr: &SocketAddrUnix) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_bind,
+            fd,
+            by_ref(&addr.unix),
+            socklen_t(addr.addr_len())
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_BIND),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                by_ref(&addr.unix),
+                socklen_t(addr.addr_len()),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn connect_v4(fd: BorrowedFd<'_>, addr: &SocketAddrV4) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_connect,
+            fd,
+            by_ref(&encode_sockaddr_v4(addr)),
+            size_of::<sockaddr_in, _>()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_CONNECT),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                by_ref(&encode_sockaddr_v4(addr)),
+                size_of::<sockaddr_in, _>(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn connect_v6(fd: BorrowedFd<'_>, addr: &SocketAddrV6) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_connect,
+            fd,
+            by_ref(&encode_sockaddr_v6(addr)),
+            size_of::<sockaddr_in6, _>()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_CONNECT),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                by_ref(&encode_sockaddr_v6(addr)),
+                size_of::<sockaddr_in6, _>(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn connect_unix(fd: BorrowedFd<'_>, addr: &SocketAddrUnix) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_connect,
+            fd,
+            by_ref(&addr.unix),
+            socklen_t(addr.addr_len())
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_CONNECT),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                by_ref(&addr.unix),
+                socklen_t(addr.addr_len()),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn connect_unspec(fd: BorrowedFd<'_>) -> io::Result<()> {
+    debug_assert_eq!(c::AF_UNSPEC, 0);
+    let addr = MaybeUninit::<c::sockaddr_storage>::zeroed();
+
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_connect,
+            fd,
+            by_ref(&addr),
+            size_of::<c::sockaddr_storage, _>()
+        ))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_CONNECT),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[
+                fd.into(),
+                by_ref(&addr),
+                size_of::<c::sockaddr_storage, _>(),
+            ])
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn listen(fd: BorrowedFd<'_>, backlog: c::c_int) -> io::Result<()> {
+    #[cfg(not(target_arch = "x86"))]
+    unsafe {
+        ret(syscall_readonly!(__NR_listen, fd, c_int(backlog)))
+    }
+    #[cfg(target_arch = "x86")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_socketcall,
+            x86_sys(SYS_LISTEN),
+            slice_just_addr::<ArgReg<'_, SocketArg>, _>(&[fd.into(), c_int(backlog)])
+        ))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/net/write_sockaddr.rs b/vendor/rustix/src/backend/linux_raw/net/write_sockaddr.rs
new file mode 100644
index 0000000..24edd49
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/write_sockaddr.rs
@@ -0,0 +1,60 @@
+//! The BSD sockets API requires us to read the `ss_family` field before we can
+//! interpret the rest of a `sockaddr` produced by the kernel.
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+use crate::net::{SocketAddrAny, SocketAddrStorage, SocketAddrUnix, SocketAddrV4, SocketAddrV6};
+use core::mem::size_of;
+
+pub(crate) unsafe fn write_sockaddr(
+    addr: &SocketAddrAny,
+    storage: *mut SocketAddrStorage,
+) -> usize {
+    match addr {
+        SocketAddrAny::V4(v4) => write_sockaddr_v4(v4, storage),
+        SocketAddrAny::V6(v6) => write_sockaddr_v6(v6, storage),
+        SocketAddrAny::Unix(unix) => write_sockaddr_unix(unix, storage),
+    }
+}
+
+pub(crate) fn encode_sockaddr_v4(v4: &SocketAddrV4) -> c::sockaddr_in {
+    c::sockaddr_in {
+        sin_family: c::AF_INET as _,
+        sin_port: u16::to_be(v4.port()),
+        sin_addr: c::in_addr {
+            s_addr: u32::from_ne_bytes(v4.ip().octets()),
+        },
+        __pad: [0_u8; 8],
+    }
+}
+
+unsafe fn write_sockaddr_v4(v4: &SocketAddrV4, storage: *mut SocketAddrStorage) -> usize {
+    let encoded = encode_sockaddr_v4(v4);
+    core::ptr::write(storage.cast(), encoded);
+    size_of::<c::sockaddr_in>()
+}
+
+pub(crate) fn encode_sockaddr_v6(v6: &SocketAddrV6) -> c::sockaddr_in6 {
+    c::sockaddr_in6 {
+        sin6_family: c::AF_INET6 as _,
+        sin6_port: u16::to_be(v6.port()),
+        sin6_flowinfo: u32::to_be(v6.flowinfo()),
+        sin6_addr: c::in6_addr {
+            in6_u: linux_raw_sys::net::in6_addr__bindgen_ty_1 {
+                u6_addr8: v6.ip().octets(),
+            },
+        },
+        sin6_scope_id: v6.scope_id(),
+    }
+}
+
+unsafe fn write_sockaddr_v6(v6: &SocketAddrV6, storage: *mut SocketAddrStorage) -> usize {
+    let encoded = encode_sockaddr_v6(v6);
+    core::ptr::write(storage.cast(), encoded);
+    size_of::<c::sockaddr_in6>()
+}
+
+unsafe fn write_sockaddr_unix(unix: &SocketAddrUnix, storage: *mut SocketAddrStorage) -> usize {
+    core::ptr::write(storage.cast(), unix.unix);
+    unix.len()
+}
diff --git a/vendor/rustix/src/backend/linux_raw/param/auxv.rs b/vendor/rustix/src/backend/linux_raw/param/auxv.rs
new file mode 100644
index 0000000..b9ac27e
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/param/auxv.rs
@@ -0,0 +1,507 @@
+//! Linux auxv support.
+//!
+//! # Safety
+//!
+//! This uses raw pointers to locate and read the kernel-provided auxv array.
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+use crate::fd::OwnedFd;
+#[cfg(feature = "param")]
+use crate::ffi::CStr;
+use crate::fs::{Mode, OFlags};
+use crate::utils::{as_ptr, check_raw_pointer};
+#[cfg(feature = "alloc")]
+use alloc::vec::Vec;
+use core::mem::size_of;
+use core::ptr::{null_mut, read_unaligned, NonNull};
+#[cfg(feature = "runtime")]
+use core::sync::atomic::AtomicU8;
+use core::sync::atomic::Ordering::Relaxed;
+use core::sync::atomic::{AtomicPtr, AtomicUsize};
+use linux_raw_sys::elf::*;
+use linux_raw_sys::general::{
+    AT_BASE, AT_CLKTCK, AT_EXECFN, AT_HWCAP, AT_HWCAP2, AT_NULL, AT_PAGESZ, AT_SYSINFO_EHDR,
+};
+#[cfg(feature = "runtime")]
+use linux_raw_sys::general::{
+    AT_EGID, AT_ENTRY, AT_EUID, AT_GID, AT_PHDR, AT_PHENT, AT_PHNUM, AT_RANDOM, AT_SECURE, AT_UID,
+};
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn page_size() -> usize {
+    let mut page_size = PAGE_SIZE.load(Relaxed);
+
+    if page_size == 0 {
+        init_auxv();
+        page_size = PAGE_SIZE.load(Relaxed);
+    }
+
+    page_size
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn clock_ticks_per_second() -> u64 {
+    let mut ticks = CLOCK_TICKS_PER_SECOND.load(Relaxed);
+
+    if ticks == 0 {
+        init_auxv();
+        ticks = CLOCK_TICKS_PER_SECOND.load(Relaxed);
+    }
+
+    ticks as u64
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn linux_hwcap() -> (usize, usize) {
+    let mut hwcap = HWCAP.load(Relaxed);
+    let mut hwcap2 = HWCAP2.load(Relaxed);
+
+    if hwcap == 0 || hwcap2 == 0 {
+        init_auxv();
+        hwcap = HWCAP.load(Relaxed);
+        hwcap2 = HWCAP2.load(Relaxed);
+    }
+
+    (hwcap, hwcap2)
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn linux_execfn() -> &'static CStr {
+    let mut execfn = EXECFN.load(Relaxed);
+
+    if execfn.is_null() {
+        init_auxv();
+        execfn = EXECFN.load(Relaxed);
+    }
+
+    // SAFETY: We assume the `AT_EXECFN` value provided by the kernel is a
+    // valid pointer to a valid NUL-terminated array of bytes.
+    unsafe { CStr::from_ptr(execfn.cast()) }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn linux_secure() -> bool {
+    let mut secure = SECURE.load(Relaxed);
+
+    // 0 means not initialized yet.
+    if secure == 0 {
+        init_auxv();
+        secure = SECURE.load(Relaxed);
+    }
+
+    // 0 means not present. Libc `getauxval(AT_SECURE)` would return 0.
+    // 1 means not in secure mode.
+    // 2 means in secure mode.
+    secure > 1
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn exe_phdrs() -> (*const c::c_void, usize, usize) {
+    let mut phdr = PHDR.load(Relaxed);
+    let mut phent = PHENT.load(Relaxed);
+    let mut phnum = PHNUM.load(Relaxed);
+
+    if phdr.is_null() || phnum == 0 {
+        init_auxv();
+        phdr = PHDR.load(Relaxed);
+        phent = PHENT.load(Relaxed);
+        phnum = PHNUM.load(Relaxed);
+    }
+
+    (phdr.cast(), phent, phnum)
+}
+
+/// `AT_SYSINFO_EHDR` isn't present on all platforms in all configurations, so
+/// if we don't see it, this function returns a null pointer.
+#[inline]
+pub(in super::super) fn sysinfo_ehdr() -> *const Elf_Ehdr {
+    let mut ehdr = SYSINFO_EHDR.load(Relaxed);
+
+    if ehdr.is_null() {
+        init_auxv();
+        ehdr = SYSINFO_EHDR.load(Relaxed);
+    }
+
+    ehdr
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn entry() -> usize {
+    let mut entry = ENTRY.load(Relaxed);
+
+    if entry == 0 {
+        init_auxv();
+        entry = ENTRY.load(Relaxed);
+    }
+
+    entry
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn random() -> *const [u8; 16] {
+    let mut random = RANDOM.load(Relaxed);
+
+    if random.is_null() {
+        init_auxv();
+        random = RANDOM.load(Relaxed);
+    }
+
+    random
+}
+
+static PAGE_SIZE: AtomicUsize = AtomicUsize::new(0);
+static CLOCK_TICKS_PER_SECOND: AtomicUsize = AtomicUsize::new(0);
+static HWCAP: AtomicUsize = AtomicUsize::new(0);
+static HWCAP2: AtomicUsize = AtomicUsize::new(0);
+static EXECFN: AtomicPtr<c::c_char> = AtomicPtr::new(null_mut());
+static SYSINFO_EHDR: AtomicPtr<Elf_Ehdr> = AtomicPtr::new(null_mut());
+#[cfg(feature = "runtime")]
+static SECURE: AtomicU8 = AtomicU8::new(0);
+#[cfg(feature = "runtime")]
+static PHDR: AtomicPtr<Elf_Phdr> = AtomicPtr::new(null_mut());
+#[cfg(feature = "runtime")]
+static PHENT: AtomicUsize = AtomicUsize::new(0);
+#[cfg(feature = "runtime")]
+static PHNUM: AtomicUsize = AtomicUsize::new(0);
+#[cfg(feature = "runtime")]
+static ENTRY: AtomicUsize = AtomicUsize::new(0);
+#[cfg(feature = "runtime")]
+static RANDOM: AtomicPtr<[u8; 16]> = AtomicPtr::new(null_mut());
+
+#[cfg(feature = "alloc")]
+fn pr_get_auxv() -> crate::io::Result<Vec<u8>> {
+    use super::super::conv::{c_int, pass_usize, ret_usize};
+    const PR_GET_AUXV: c::c_int = 0x4155_5856;
+    let mut buffer = alloc::vec![0u8; 512];
+    let len = unsafe {
+        ret_usize(syscall_always_asm!(
+            __NR_prctl,
+            c_int(PR_GET_AUXV),
+            buffer.as_ptr(),
+            pass_usize(buffer.len()),
+            pass_usize(0),
+            pass_usize(0)
+        ))?
+    };
+    if len <= buffer.len() {
+        buffer.truncate(len);
+        return Ok(buffer);
+    }
+    buffer.resize(len, 0);
+    let len = unsafe {
+        ret_usize(syscall_always_asm!(
+            __NR_prctl,
+            c_int(PR_GET_AUXV),
+            buffer.as_ptr(),
+            pass_usize(buffer.len()),
+            pass_usize(0),
+            pass_usize(0)
+        ))?
+    };
+    assert_eq!(len, buffer.len());
+    return Ok(buffer);
+}
+
+/// If we don't have "use-explicitly-provided-auxv" or "use-libc-auxv", we
+/// read the aux vector via the `prctl` `PR_GET_AUXV`, with a fallback to
+/// /proc/self/auxv for kernels that don't support `PR_GET_AUXV`.
+#[cold]
+fn init_auxv() {
+    #[cfg(feature = "alloc")]
+    {
+        match pr_get_auxv() {
+            Ok(buffer) => {
+                // SAFETY: We assume the kernel returns a valid auxv.
+                unsafe {
+                    init_from_aux_iter(AuxPointer(buffer.as_ptr().cast())).unwrap();
+                }
+                return;
+            }
+            Err(_) => {
+                // Fall back to /proc/self/auxv on error.
+            }
+        }
+    }
+
+    // Open "/proc/self/auxv", either because we trust "/proc", or because
+    // we're running inside QEMU and `proc_self_auxv`'s extra checking foils
+    // QEMU's emulation so we need to do a plain open to get the right
+    // auxv records.
+    let file = crate::fs::open("/proc/self/auxv", OFlags::RDONLY, Mode::empty()).unwrap();
+
+    #[cfg(feature = "alloc")]
+    init_from_auxv_file(file).unwrap();
+
+    #[cfg(not(feature = "alloc"))]
+    unsafe {
+        init_from_aux_iter(AuxFile(file)).unwrap();
+    }
+}
+
+/// Process auxv entries from the open file `auxv`.
+#[cfg(feature = "alloc")]
+#[cold]
+#[must_use]
+fn init_from_auxv_file(auxv: OwnedFd) -> Option<()> {
+    let mut buffer = Vec::<u8>::with_capacity(512);
+    loop {
+        let cur = buffer.len();
+
+        // Request one extra byte; `Vec` will often allocate more.
+        buffer.reserve(1);
+
+        // Use all the space it allocated.
+        buffer.resize(buffer.capacity(), 0);
+
+        // Read up to that many bytes.
+        let n = match crate::io::read(&auxv, &mut buffer[cur..]) {
+            Err(crate::io::Errno::INTR) => 0,
+            Err(_err) => panic!(),
+            Ok(0) => break,
+            Ok(n) => n,
+        };
+
+        // Account for the number of bytes actually read.
+        buffer.resize(cur + n, 0_u8);
+    }
+
+    // SAFETY: We loaded from an auxv file into the buffer.
+    unsafe { init_from_aux_iter(AuxPointer(buffer.as_ptr().cast())) }
+}
+
+/// Process auxv entries from the auxv array pointed to by `auxp`.
+///
+/// # Safety
+///
+/// This must be passed a pointer to an auxv array.
+///
+/// The buffer contains `Elf_aux_t` elements, though it need not be aligned;
+/// function uses `read_unaligned` to read from it.
+#[cold]
+#[must_use]
+unsafe fn init_from_aux_iter(aux_iter: impl Iterator<Item = Elf_auxv_t>) -> Option<()> {
+    let mut pagesz = 0;
+    let mut clktck = 0;
+    let mut hwcap = 0;
+    let mut hwcap2 = 0;
+    let mut execfn = null_mut();
+    let mut sysinfo_ehdr = null_mut();
+    #[cfg(feature = "runtime")]
+    let mut secure = 0;
+    #[cfg(feature = "runtime")]
+    let mut phdr = null_mut();
+    #[cfg(feature = "runtime")]
+    let mut phnum = 0;
+    #[cfg(feature = "runtime")]
+    let mut phent = 0;
+    #[cfg(feature = "runtime")]
+    let mut entry = 0;
+    #[cfg(feature = "runtime")]
+    let mut uid = None;
+    #[cfg(feature = "runtime")]
+    let mut euid = None;
+    #[cfg(feature = "runtime")]
+    let mut gid = None;
+    #[cfg(feature = "runtime")]
+    let mut egid = None;
+    #[cfg(feature = "runtime")]
+    let mut random = null_mut();
+
+    for Elf_auxv_t { a_type, a_val } in aux_iter {
+        match a_type as _ {
+            AT_PAGESZ => pagesz = a_val as usize,
+            AT_CLKTCK => clktck = a_val as usize,
+            AT_HWCAP => hwcap = a_val as usize,
+            AT_HWCAP2 => hwcap2 = a_val as usize,
+            AT_EXECFN => execfn = check_raw_pointer::<c::c_char>(a_val as *mut _)?.as_ptr(),
+            AT_SYSINFO_EHDR => sysinfo_ehdr = check_elf_base(a_val as *mut _)?.as_ptr(),
+
+            AT_BASE => {
+                // The `AT_BASE` value can be NULL in a static executable that
+                // doesn't use a dynamic linker. If so, ignore it.
+                if !a_val.is_null() {
+                    let _ = check_elf_base(a_val.cast())?;
+                }
+            }
+
+            #[cfg(feature = "runtime")]
+            AT_SECURE => secure = (a_val as usize != 0) as u8 + 1,
+            #[cfg(feature = "runtime")]
+            AT_UID => uid = Some(a_val),
+            #[cfg(feature = "runtime")]
+            AT_EUID => euid = Some(a_val),
+            #[cfg(feature = "runtime")]
+            AT_GID => gid = Some(a_val),
+            #[cfg(feature = "runtime")]
+            AT_EGID => egid = Some(a_val),
+            #[cfg(feature = "runtime")]
+            AT_PHDR => phdr = check_raw_pointer::<Elf_Phdr>(a_val as *mut _)?.as_ptr(),
+            #[cfg(feature = "runtime")]
+            AT_PHNUM => phnum = a_val as usize,
+            #[cfg(feature = "runtime")]
+            AT_PHENT => phent = a_val as usize,
+            #[cfg(feature = "runtime")]
+            AT_ENTRY => entry = a_val as usize,
+            #[cfg(feature = "runtime")]
+            AT_RANDOM => random = check_raw_pointer::<[u8; 16]>(a_val as *mut _)?.as_ptr(),
+
+            AT_NULL => break,
+            _ => (),
+        }
+    }
+
+    #[cfg(feature = "runtime")]
+    assert_eq!(phent, size_of::<Elf_Phdr>());
+
+    // If we're running set-uid or set-gid, enable “secure execution” mode,
+    // which doesn't do much, but users may be depending on the things that
+    // it does do.
+    #[cfg(feature = "runtime")]
+    if uid != euid || gid != egid {
+        secure = 2;
+    }
+
+    // The base and sysinfo_ehdr (if present) matches our platform. Accept the
+    // aux values.
+    PAGE_SIZE.store(pagesz, Relaxed);
+    CLOCK_TICKS_PER_SECOND.store(clktck, Relaxed);
+    HWCAP.store(hwcap, Relaxed);
+    HWCAP2.store(hwcap2, Relaxed);
+    EXECFN.store(execfn, Relaxed);
+    SYSINFO_EHDR.store(sysinfo_ehdr, Relaxed);
+    #[cfg(feature = "runtime")]
+    SECURE.store(secure, Relaxed);
+    #[cfg(feature = "runtime")]
+    PHDR.store(phdr, Relaxed);
+    #[cfg(feature = "runtime")]
+    PHNUM.store(phnum, Relaxed);
+    #[cfg(feature = "runtime")]
+    ENTRY.store(entry, Relaxed);
+    #[cfg(feature = "runtime")]
+    RANDOM.store(random, Relaxed);
+
+    Some(())
+}
+
+/// Check that `base` is a valid pointer to the kernel-provided vDSO.
+///
+/// `base` is some value we got from a `AT_SYSINFO_EHDR` aux record somewhere,
+/// which hopefully holds the value of the kernel-provided vDSO in memory. Do a
+/// series of checks to be as sure as we can that it's safe to use.
+#[cold]
+#[must_use]
+unsafe fn check_elf_base(base: *const Elf_Ehdr) -> Option<NonNull<Elf_Ehdr>> {
+    // If we're reading a 64-bit auxv on a 32-bit platform, we'll see a zero
+    // `a_val` because `AT_*` values are never greater than `u32::MAX`. Zero is
+    // used by libc's `getauxval` to indicate errors, so it should never be a
+    // valid value.
+    if base.is_null() {
+        return None;
+    }
+
+    let hdr = match check_raw_pointer::<Elf_Ehdr>(base as *mut _) {
+        Some(hdr) => hdr,
+        None => return None,
+    };
+
+    let hdr = hdr.as_ref();
+    if hdr.e_ident[..SELFMAG] != ELFMAG {
+        return None; // Wrong ELF magic
+    }
+    if !matches!(hdr.e_ident[EI_OSABI], ELFOSABI_SYSV | ELFOSABI_LINUX) {
+        return None; // Unrecognized ELF OS ABI
+    }
+    if hdr.e_ident[EI_ABIVERSION] != ELFABIVERSION {
+        return None; // Unrecognized ELF ABI version
+    }
+    if hdr.e_type != ET_DYN {
+        return None; // Wrong ELF type
+    }
+
+    // If ELF is extended, we'll need to adjust.
+    if hdr.e_ident[EI_VERSION] != EV_CURRENT
+        || hdr.e_ehsize as usize != size_of::<Elf_Ehdr>()
+        || hdr.e_phentsize as usize != size_of::<Elf_Phdr>()
+    {
+        return None;
+    }
+    // We don't currently support extra-large numbers of segments.
+    if hdr.e_phnum == PN_XNUM {
+        return None;
+    }
+
+    // If `e_phoff` is zero, it's more likely that we're looking at memory that
+    // has been zeroed than that the kernel has somehow aliased the `Ehdr` and
+    // the `Phdr`.
+    if hdr.e_phoff < size_of::<Elf_Ehdr>() {
+        return None;
+    }
+
+    // Verify that the `EI_CLASS`/`EI_DATA`/`e_machine` fields match the
+    // architecture we're running as. This helps catch cases where we're
+    // running under QEMU.
+    if hdr.e_ident[EI_CLASS] != ELFCLASS {
+        return None; // Wrong ELF class
+    }
+    if hdr.e_ident[EI_DATA] != ELFDATA {
+        return None; // Wrong ELF data
+    }
+    if hdr.e_machine != EM_CURRENT {
+        return None; // Wrong machine type
+    }
+
+    Some(NonNull::new_unchecked(as_ptr(hdr) as *mut _))
+}
+
+// Aux reading utilities
+
+// Read auxv records from an array in memory.
+struct AuxPointer(*const Elf_auxv_t);
+
+impl Iterator for AuxPointer {
+    type Item = Elf_auxv_t;
+
+    #[cold]
+    fn next(&mut self) -> Option<Self::Item> {
+        unsafe {
+            let value = read_unaligned(self.0);
+            self.0 = self.0.add(1);
+            Some(value)
+        }
+    }
+}
+
+// Read auxv records from a file.
+#[cfg(not(feature = "alloc"))]
+struct AuxFile(OwnedFd);
+
+#[cfg(not(feature = "alloc"))]
+impl Iterator for AuxFile {
+    type Item = Elf_auxv_t;
+
+    // This implementation does lots of `read`s and it isn't amazing, but
+    // hopefully we won't use it often.
+    #[cold]
+    fn next(&mut self) -> Option<Self::Item> {
+        let mut buf = [0_u8; size_of::<Self::Item>()];
+        let mut slice = &mut buf[..];
+        while !slice.is_empty() {
+            match crate::io::read(&self.0, slice) {
+                Ok(0) => panic!("unexpected end of auxv file"),
+                Ok(n) => slice = &mut slice[n..],
+                Err(crate::io::Errno::INTR) => continue,
+                Err(err) => panic!("{:?}", err),
+            }
+        }
+        Some(unsafe { read_unaligned(buf.as_ptr().cast()) })
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/param/init.rs b/vendor/rustix/src/backend/linux_raw/param/init.rs
new file mode 100644
index 0000000..fe29e9c
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/param/init.rs
@@ -0,0 +1,171 @@
+//! Linux auxv `init` function, for "use-explicitly-provided-auxv" mode.
+//!
+//! # Safety
+//!
+//! This uses raw pointers to locate and read the kernel-provided auxv array.
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+#[cfg(feature = "param")]
+use crate::ffi::CStr;
+use core::ffi::c_void;
+use core::ptr::{null_mut, read, NonNull};
+#[cfg(feature = "runtime")]
+use core::sync::atomic::AtomicBool;
+use core::sync::atomic::{AtomicPtr, AtomicUsize, Ordering};
+use linux_raw_sys::elf::*;
+use linux_raw_sys::general::{
+    AT_CLKTCK, AT_EXECFN, AT_HWCAP, AT_HWCAP2, AT_NULL, AT_PAGESZ, AT_SYSINFO_EHDR,
+};
+#[cfg(feature = "runtime")]
+use linux_raw_sys::general::{AT_ENTRY, AT_PHDR, AT_PHENT, AT_PHNUM, AT_RANDOM, AT_SECURE};
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn page_size() -> usize {
+    unsafe { PAGE_SIZE.load(Ordering::Relaxed) }
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn clock_ticks_per_second() -> u64 {
+    unsafe { CLOCK_TICKS_PER_SECOND.load(Ordering::Relaxed) as u64 }
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn linux_hwcap() -> (usize, usize) {
+    unsafe {
+        (
+            HWCAP.load(Ordering::Relaxed),
+            HWCAP2.load(Ordering::Relaxed),
+        )
+    }
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn linux_execfn() -> &'static CStr {
+    let execfn = unsafe { EXECFN.load(Ordering::Relaxed) };
+
+    // SAFETY: We initialize `EXECFN` to a valid `CStr` pointer, and we assume
+    // the `AT_EXECFN` value provided by the kernel points to a valid C string.
+    unsafe { CStr::from_ptr(execfn.cast()) }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn linux_secure() -> bool {
+    unsafe { SECURE.load(Ordering::Relaxed) }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn exe_phdrs() -> (*const c_void, usize, usize) {
+    unsafe {
+        (
+            PHDR.load(Ordering::Relaxed).cast(),
+            PHENT.load(Ordering::Relaxed),
+            PHNUM.load(Ordering::Relaxed),
+        )
+    }
+}
+
+/// `AT_SYSINFO_EHDR` isn't present on all platforms in all configurations, so
+/// if we don't see it, this function returns a null pointer.
+#[inline]
+pub(in super::super) fn sysinfo_ehdr() -> *const Elf_Ehdr {
+    unsafe { SYSINFO_EHDR.load(Ordering::Relaxed) }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn entry() -> usize {
+    unsafe { ENTRY.load(Ordering::Relaxed) }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn random() -> *const [u8; 16] {
+    unsafe { RANDOM.load(Ordering::Relaxed) }
+}
+
+static mut PAGE_SIZE: AtomicUsize = AtomicUsize::new(0);
+static mut CLOCK_TICKS_PER_SECOND: AtomicUsize = AtomicUsize::new(0);
+static mut HWCAP: AtomicUsize = AtomicUsize::new(0);
+static mut HWCAP2: AtomicUsize = AtomicUsize::new(0);
+static mut SYSINFO_EHDR: AtomicPtr<Elf_Ehdr> = AtomicPtr::new(null_mut());
+// Initialize `EXECFN` to a valid `CStr` pointer so that we don't need to check
+// for null on every `execfn` call.
+static mut EXECFN: AtomicPtr<c::c_char> = AtomicPtr::new(b"\0".as_ptr() as _);
+#[cfg(feature = "runtime")]
+static mut SECURE: AtomicBool = AtomicBool::new(false);
+// Use `dangling` so that we can always treat it like an empty slice.
+#[cfg(feature = "runtime")]
+static mut PHDR: AtomicPtr<Elf_Phdr> = AtomicPtr::new(NonNull::dangling().as_ptr());
+#[cfg(feature = "runtime")]
+static mut PHENT: AtomicUsize = AtomicUsize::new(0);
+#[cfg(feature = "runtime")]
+static mut PHNUM: AtomicUsize = AtomicUsize::new(0);
+#[cfg(feature = "runtime")]
+static mut ENTRY: AtomicUsize = AtomicUsize::new(0);
+#[cfg(feature = "runtime")]
+static mut RANDOM: AtomicPtr<[u8; 16]> = AtomicPtr::new(NonNull::dangling().as_ptr());
+
+/// When "use-explicitly-provided-auxv" is enabled, we export a function to be
+/// called during initialization, and passed a pointer to the original
+/// environment variable block set up by the OS.
+pub(crate) unsafe fn init(envp: *mut *mut u8) {
+    init_from_envp(envp);
+}
+
+/// # Safety
+///
+/// This must be passed a pointer to the environment variable buffer
+/// provided by the kernel, which is followed in memory by the auxv array.
+unsafe fn init_from_envp(mut envp: *mut *mut u8) {
+    while !(*envp).is_null() {
+        envp = envp.add(1);
+    }
+    init_from_auxp(envp.add(1).cast())
+}
+
+/// Process auxv entries from the auxv array pointed to by `auxp`.
+///
+/// # Safety
+///
+/// This must be passed a pointer to an auxv array.
+///
+/// The buffer contains `Elf_aux_t` elements, though it need not be aligned;
+/// function uses `read_unaligned` to read from it.
+unsafe fn init_from_auxp(mut auxp: *const Elf_auxv_t) {
+    loop {
+        let Elf_auxv_t { a_type, a_val } = read(auxp);
+
+        match a_type as _ {
+            AT_PAGESZ => PAGE_SIZE.store(a_val as usize, Ordering::Relaxed),
+            AT_CLKTCK => CLOCK_TICKS_PER_SECOND.store(a_val as usize, Ordering::Relaxed),
+            AT_HWCAP => HWCAP.store(a_val as usize, Ordering::Relaxed),
+            AT_HWCAP2 => HWCAP2.store(a_val as usize, Ordering::Relaxed),
+            AT_EXECFN => EXECFN.store(a_val.cast::<c::c_char>(), Ordering::Relaxed),
+            AT_SYSINFO_EHDR => SYSINFO_EHDR.store(a_val.cast::<Elf_Ehdr>(), Ordering::Relaxed),
+
+            #[cfg(feature = "runtime")]
+            AT_SECURE => SECURE.store(a_val as usize != 0, Ordering::Relaxed),
+            #[cfg(feature = "runtime")]
+            AT_PHDR => PHDR.store(a_val.cast::<Elf_Phdr>(), Ordering::Relaxed),
+            #[cfg(feature = "runtime")]
+            AT_PHNUM => PHNUM.store(a_val as usize, Ordering::Relaxed),
+            #[cfg(feature = "runtime")]
+            AT_PHENT => PHENT.store(a_val as usize, Ordering::Relaxed),
+            #[cfg(feature = "runtime")]
+            AT_ENTRY => ENTRY.store(a_val as usize, Ordering::Relaxed),
+            #[cfg(feature = "runtime")]
+            AT_RANDOM => RANDOM.store(a_val.cast::<[u8; 16]>(), Ordering::Relaxed),
+
+            AT_NULL => break,
+            _ => (),
+        }
+        auxp = auxp.add(1);
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/param/libc_auxv.rs b/vendor/rustix/src/backend/linux_raw/param/libc_auxv.rs
new file mode 100644
index 0000000..cfdd7a5
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/param/libc_auxv.rs
@@ -0,0 +1,175 @@
+//! Linux auxv support, using libc.
+//!
+//! # Safety
+//!
+//! This uses raw pointers to locate and read the kernel-provided auxv array.
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+#[cfg(feature = "param")]
+use crate::ffi::CStr;
+#[cfg(not(feature = "runtime"))]
+use core::ptr::null;
+use linux_raw_sys::elf::*;
+
+// `getauxval` wasn't supported in glibc until 2.16. Also this lets us use
+// `*mut` as the return type to preserve strict provenance.
+#[cfg(not(feature = "runtime"))]
+weak!(fn getauxval(c::c_ulong) -> *mut c::c_void);
+
+// With the "runtime" feature, go ahead and depend on `getauxval` existing so
+// that we never fail.
+#[cfg(feature = "runtime")]
+extern "C" {
+    fn getauxval(type_: c::c_ulong) -> *mut c::c_void;
+}
+
+#[cfg(feature = "runtime")]
+const AT_PHDR: c::c_ulong = 3;
+#[cfg(feature = "runtime")]
+const AT_PHENT: c::c_ulong = 4;
+#[cfg(feature = "runtime")]
+const AT_PHNUM: c::c_ulong = 5;
+#[cfg(feature = "runtime")]
+const AT_ENTRY: c::c_ulong = 9;
+const AT_HWCAP: c::c_ulong = 16;
+#[cfg(feature = "runtime")]
+const AT_RANDOM: c::c_ulong = 25;
+const AT_HWCAP2: c::c_ulong = 26;
+const AT_SECURE: c::c_ulong = 23;
+const AT_EXECFN: c::c_ulong = 31;
+const AT_SYSINFO_EHDR: c::c_ulong = 33;
+
+// Declare `sysconf` ourselves so that we don't depend on all of libc just for
+// this.
+extern "C" {
+    fn sysconf(name: c::c_int) -> c::c_long;
+}
+
+#[cfg(target_os = "android")]
+const _SC_PAGESIZE: c::c_int = 39;
+#[cfg(target_os = "linux")]
+const _SC_PAGESIZE: c::c_int = 30;
+#[cfg(target_os = "android")]
+const _SC_CLK_TCK: c::c_int = 6;
+#[cfg(target_os = "linux")]
+const _SC_CLK_TCK: c::c_int = 2;
+
+#[test]
+fn test_abi() {
+    const_assert_eq!(self::_SC_PAGESIZE, ::libc::_SC_PAGESIZE);
+    const_assert_eq!(self::_SC_CLK_TCK, ::libc::_SC_CLK_TCK);
+    const_assert_eq!(self::AT_HWCAP, ::libc::AT_HWCAP);
+    const_assert_eq!(self::AT_HWCAP2, ::libc::AT_HWCAP2);
+    const_assert_eq!(self::AT_EXECFN, ::libc::AT_EXECFN);
+    const_assert_eq!(self::AT_SECURE, ::libc::AT_SECURE);
+    const_assert_eq!(self::AT_SYSINFO_EHDR, ::libc::AT_SYSINFO_EHDR);
+    #[cfg(feature = "runtime")]
+    const_assert_eq!(self::AT_PHDR, ::libc::AT_PHDR);
+    #[cfg(feature = "runtime")]
+    const_assert_eq!(self::AT_PHNUM, ::libc::AT_PHNUM);
+    #[cfg(feature = "runtime")]
+    const_assert_eq!(self::AT_ENTRY, ::libc::AT_ENTRY);
+    #[cfg(feature = "runtime")]
+    const_assert_eq!(self::AT_RANDOM, ::libc::AT_RANDOM);
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn page_size() -> usize {
+    unsafe { sysconf(_SC_PAGESIZE) as usize }
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn clock_ticks_per_second() -> u64 {
+    unsafe { sysconf(_SC_CLK_TCK) as u64 }
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn linux_hwcap() -> (usize, usize) {
+    #[cfg(not(feature = "runtime"))]
+    unsafe {
+        if let Some(libc_getauxval) = getauxval.get() {
+            let hwcap = libc_getauxval(AT_HWCAP) as usize;
+            let hwcap2 = libc_getauxval(AT_HWCAP2) as usize;
+            (hwcap, hwcap2)
+        } else {
+            (0, 0)
+        }
+    }
+
+    #[cfg(feature = "runtime")]
+    unsafe {
+        let hwcap = getauxval(AT_HWCAP) as usize;
+        let hwcap2 = getauxval(AT_HWCAP2) as usize;
+        (hwcap, hwcap2)
+    }
+}
+
+#[cfg(feature = "param")]
+#[inline]
+pub(crate) fn linux_execfn() -> &'static CStr {
+    #[cfg(not(feature = "runtime"))]
+    unsafe {
+        if let Some(libc_getauxval) = getauxval.get() {
+            CStr::from_ptr(libc_getauxval(AT_EXECFN).cast())
+        } else {
+            cstr!("")
+        }
+    }
+
+    #[cfg(feature = "runtime")]
+    unsafe {
+        CStr::from_ptr(getauxval(AT_EXECFN).cast())
+    }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn linux_secure() -> bool {
+    unsafe { getauxval(AT_SECURE) as usize != 0 }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn exe_phdrs() -> (*const c::c_void, usize, usize) {
+    unsafe {
+        let phdr = getauxval(AT_PHDR) as *const c::c_void;
+        let phent = getauxval(AT_PHENT) as usize;
+        let phnum = getauxval(AT_PHNUM) as usize;
+        (phdr, phent, phnum)
+    }
+}
+
+/// `AT_SYSINFO_EHDR` isn't present on all platforms in all configurations, so
+/// if we don't see it, this function returns a null pointer.
+#[inline]
+pub(in super::super) fn sysinfo_ehdr() -> *const Elf_Ehdr {
+    #[cfg(not(feature = "runtime"))]
+    unsafe {
+        if let Some(libc_getauxval) = getauxval.get() {
+            libc_getauxval(AT_SYSINFO_EHDR) as *const Elf_Ehdr
+        } else {
+            null()
+        }
+    }
+
+    #[cfg(feature = "runtime")]
+    unsafe {
+        getauxval(AT_SYSINFO_EHDR) as *const Elf_Ehdr
+    }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn entry() -> usize {
+    unsafe { getauxval(AT_ENTRY) as usize }
+}
+
+#[cfg(feature = "runtime")]
+#[inline]
+pub(crate) fn random() -> *const [u8; 16] {
+    unsafe { getauxval(AT_RANDOM) as *const [u8; 16] }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/param/mod.rs b/vendor/rustix/src/backend/linux_raw/param/mod.rs
new file mode 100644
index 0000000..365f016
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/param/mod.rs
@@ -0,0 +1,15 @@
+// With "use-explicitly-provided-auxv" enabled, we expect to be initialized
+// with an explicit `rustix::param::init` call.
+//
+// With "use-libc-auxv" enabled, use libc's `getauxval`.
+//
+// Otherwise, we read aux values from /proc/self/auxv.
+#[cfg_attr(feature = "use-explicitly-provided-auxv", path = "init.rs")]
+#[cfg_attr(
+    all(
+        not(feature = "use-explicitly-provided-auxv"),
+        feature = "use-libc-auxv"
+    ),
+    path = "libc_auxv.rs"
+)]
+pub(crate) mod auxv;
diff --git a/vendor/rustix/src/backend/linux_raw/pid/mod.rs b/vendor/rustix/src/backend/linux_raw/pid/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/pid/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/linux_raw/pid/syscalls.rs b/vendor/rustix/src/backend/linux_raw/pid/syscalls.rs
new file mode 100644
index 0000000..9665ab3
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/pid/syscalls.rs
@@ -0,0 +1,17 @@
+//! linux_raw syscalls for PIDs
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::conv::ret_usize_infallible;
+use crate::pid::{Pid, RawPid};
+
+#[inline]
+pub(crate) fn getpid() -> Pid {
+    unsafe {
+        let pid = ret_usize_infallible(syscall_readonly!(__NR_getpid)) as RawPid;
+        Pid::from_raw_unchecked(pid)
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/pipe/mod.rs b/vendor/rustix/src/backend/linux_raw/pipe/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/pipe/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/pipe/syscalls.rs b/vendor/rustix/src/backend/linux_raw/pipe/syscalls.rs
new file mode 100644
index 0000000..ec3e459
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/pipe/syscalls.rs
@@ -0,0 +1,135 @@
+//! linux_raw syscalls supporting `rustix::pipe`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::conv::{c_int, c_uint, opt_mut, pass_usize, ret, ret_usize, slice};
+use crate::backend::{c, MAX_IOV};
+use crate::fd::{BorrowedFd, OwnedFd};
+use crate::io;
+use crate::pipe::{IoSliceRaw, PipeFlags, SpliceFlags};
+use core::cmp;
+use core::mem::MaybeUninit;
+use linux_raw_sys::general::{F_GETPIPE_SZ, F_SETPIPE_SZ};
+
+#[inline]
+pub(crate) fn pipe() -> io::Result<(OwnedFd, OwnedFd)> {
+    // aarch64 and risc64 omit `__NR_pipe`. On mips, `__NR_pipe` uses a special
+    // calling convention, but using it is not worth complicating our syscall
+    // wrapping infrastructure at this time.
+    #[cfg(any(
+        target_arch = "aarch64",
+        target_arch = "mips",
+        target_arch = "mips32r6",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "riscv64",
+    ))]
+    {
+        pipe_with(PipeFlags::empty())
+    }
+    #[cfg(not(any(
+        target_arch = "aarch64",
+        target_arch = "mips",
+        target_arch = "mips32r6",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "riscv64",
+    )))]
+    unsafe {
+        let mut result = MaybeUninit::<[OwnedFd; 2]>::uninit();
+        ret(syscall!(__NR_pipe, &mut result))?;
+        let [p0, p1] = result.assume_init();
+        Ok((p0, p1))
+    }
+}
+
+#[inline]
+pub(crate) fn pipe_with(flags: PipeFlags) -> io::Result<(OwnedFd, OwnedFd)> {
+    unsafe {
+        let mut result = MaybeUninit::<[OwnedFd; 2]>::uninit();
+        ret(syscall!(__NR_pipe2, &mut result, flags))?;
+        let [p0, p1] = result.assume_init();
+        Ok((p0, p1))
+    }
+}
+
+#[inline]
+pub fn splice(
+    fd_in: BorrowedFd<'_>,
+    off_in: Option<&mut u64>,
+    fd_out: BorrowedFd<'_>,
+    off_out: Option<&mut u64>,
+    len: usize,
+    flags: SpliceFlags,
+) -> io::Result<usize> {
+    unsafe {
+        ret_usize(syscall!(
+            __NR_splice,
+            fd_in,
+            opt_mut(off_in),
+            fd_out,
+            opt_mut(off_out),
+            pass_usize(len),
+            flags
+        ))
+    }
+}
+
+#[inline]
+pub unsafe fn vmsplice(
+    fd: BorrowedFd<'_>,
+    bufs: &[IoSliceRaw<'_>],
+    flags: SpliceFlags,
+) -> io::Result<usize> {
+    let (bufs_addr, bufs_len) = slice(&bufs[..cmp::min(bufs.len(), MAX_IOV)]);
+    ret_usize(syscall!(__NR_vmsplice, fd, bufs_addr, bufs_len, flags))
+}
+
+#[inline]
+pub fn tee(
+    fd_in: BorrowedFd<'_>,
+    fd_out: BorrowedFd<'_>,
+    len: usize,
+    flags: SpliceFlags,
+) -> io::Result<usize> {
+    unsafe { ret_usize(syscall!(__NR_tee, fd_in, fd_out, pass_usize(len), flags)) }
+}
+
+#[inline]
+pub(crate) fn fcntl_getpipe_sz(fd: BorrowedFd<'_>) -> io::Result<usize> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret_usize(syscall_readonly!(__NR_fcntl64, fd, c_uint(F_GETPIPE_SZ)))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret_usize(syscall_readonly!(__NR_fcntl, fd, c_uint(F_GETPIPE_SZ)))
+    }
+}
+
+#[inline]
+pub(crate) fn fcntl_setpipe_sz(fd: BorrowedFd<'_>, size: usize) -> io::Result<()> {
+    let size: c::c_int = size.try_into().map_err(|_| io::Errno::PERM)?;
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fcntl64,
+            fd,
+            c_uint(F_SETPIPE_SZ),
+            c_int(size)
+        ))
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_fcntl,
+            fd,
+            c_uint(F_SETPIPE_SZ),
+            c_int(size)
+        ))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/pipe/types.rs b/vendor/rustix/src/backend/linux_raw/pipe/types.rs
new file mode 100644
index 0000000..2d1ed9a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/pipe/types.rs
@@ -0,0 +1,80 @@
+use crate::backend::c;
+use bitflags::bitflags;
+use core::marker::PhantomData;
+
+bitflags! {
+    /// `O_*` constants for use with [`pipe_with`].
+    ///
+    /// [`pipe_with`]: crate::pipe::pipe_with
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct PipeFlags: c::c_uint {
+        /// `O_CLOEXEC`
+        const CLOEXEC = linux_raw_sys::general::O_CLOEXEC;
+        /// `O_DIRECT`
+        const DIRECT = linux_raw_sys::general::O_DIRECT;
+        /// `O_NONBLOCK`
+        const NONBLOCK = linux_raw_sys::general::O_NONBLOCK;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `SPLICE_F_*` constants for use with [`splice`], [`vmsplice`], and
+    /// [`tee`].
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct SpliceFlags: c::c_uint {
+        /// `SPLICE_F_MOVE`
+        const MOVE = linux_raw_sys::general::SPLICE_F_MOVE;
+        /// `SPLICE_F_NONBLOCK`
+        const NONBLOCK = linux_raw_sys::general::SPLICE_F_NONBLOCK;
+        /// `SPLICE_F_MORE`
+        const MORE = linux_raw_sys::general::SPLICE_F_MORE;
+        /// `SPLICE_F_GIFT`
+        const GIFT = linux_raw_sys::general::SPLICE_F_GIFT;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// A buffer type for use with [`vmsplice`].
+///
+/// It is guaranteed to be ABI compatible with the iovec type on Unix platforms
+/// and `WSABUF` on Windows. Unlike `IoSlice` and `IoSliceMut` it is
+/// semantically like a raw pointer, and therefore can be shared or mutated as
+/// needed.
+///
+/// [`vmsplice`]: crate::pipe::vmsplice
+#[repr(transparent)]
+pub struct IoSliceRaw<'a> {
+    _buf: c::iovec,
+    _lifetime: PhantomData<&'a ()>,
+}
+
+impl<'a> IoSliceRaw<'a> {
+    /// Creates a new `IoSlice` wrapping a byte slice.
+    pub fn from_slice(buf: &'a [u8]) -> Self {
+        IoSliceRaw {
+            _buf: c::iovec {
+                iov_base: (buf.as_ptr() as *mut u8).cast::<c::c_void>(),
+                iov_len: buf.len() as _,
+            },
+            _lifetime: PhantomData,
+        }
+    }
+
+    /// Creates a new `IoSlice` wrapping a mutable byte slice.
+    pub fn from_slice_mut(buf: &'a mut [u8]) -> Self {
+        IoSliceRaw {
+            _buf: c::iovec {
+                iov_base: buf.as_mut_ptr().cast::<c::c_void>(),
+                iov_len: buf.len() as _,
+            },
+            _lifetime: PhantomData,
+        }
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/prctl/mod.rs b/vendor/rustix/src/backend/linux_raw/prctl/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/prctl/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/linux_raw/prctl/syscalls.rs b/vendor/rustix/src/backend/linux_raw/prctl/syscalls.rs
new file mode 100644
index 0000000..1410d51
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/prctl/syscalls.rs
@@ -0,0 +1,21 @@
+//! linux_raw syscalls supporting modules that use `prctl`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+use crate::backend::conv::{c_int, ret_c_int};
+use crate::io;
+
+#[inline]
+pub(crate) unsafe fn prctl(
+    option: c::c_int,
+    arg2: *mut c::c_void,
+    arg3: *mut c::c_void,
+    arg4: *mut c::c_void,
+    arg5: *mut c::c_void,
+) -> io::Result<c::c_int> {
+    ret_c_int(syscall!(__NR_prctl, c_int(option), arg2, arg3, arg4, arg5))
+}
diff --git a/vendor/rustix/src/backend/linux_raw/process/cpu_set.rs b/vendor/rustix/src/backend/linux_raw/process/cpu_set.rs
new file mode 100644
index 0000000..35146cf
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/process/cpu_set.rs
@@ -0,0 +1,46 @@
+//! Rust implementation of the `CPU_*` macro API.
+
+#![allow(non_snake_case)]
+
+use super::types::RawCpuSet;
+use core::mem::size_of_val;
+
+#[inline]
+pub(crate) fn CPU_SET(cpu: usize, cpuset: &mut RawCpuSet) {
+    let size_in_bits = 8 * size_of_val(&cpuset.bits[0]); // 32, 64 etc
+    let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
+    cpuset.bits[idx] |= 1 << offset
+}
+
+#[inline]
+pub(crate) fn CPU_ZERO(cpuset: &mut RawCpuSet) {
+    cpuset.bits.fill(0)
+}
+
+#[inline]
+pub(crate) fn CPU_CLR(cpu: usize, cpuset: &mut RawCpuSet) {
+    let size_in_bits = 8 * size_of_val(&cpuset.bits[0]); // 32, 64 etc
+    let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
+    cpuset.bits[idx] &= !(1 << offset)
+}
+
+#[inline]
+pub(crate) fn CPU_ISSET(cpu: usize, cpuset: &RawCpuSet) -> bool {
+    let size_in_bits = 8 * size_of_val(&cpuset.bits[0]);
+    let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
+    (cpuset.bits[idx] & (1 << offset)) != 0
+}
+
+#[inline]
+pub(crate) fn CPU_COUNT_S(size_in_bytes: usize, cpuset: &RawCpuSet) -> u32 {
+    let size_of_mask = size_of_val(&cpuset.bits[0]);
+    let idx = size_in_bytes / size_of_mask;
+    cpuset.bits[..idx]
+        .iter()
+        .fold(0, |acc, i| acc + i.count_ones())
+}
+
+#[inline]
+pub(crate) fn CPU_COUNT(cpuset: &RawCpuSet) -> u32 {
+    CPU_COUNT_S(core::mem::size_of::<RawCpuSet>(), cpuset)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/process/mod.rs b/vendor/rustix/src/backend/linux_raw/process/mod.rs
new file mode 100644
index 0000000..9b2c25f
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/process/mod.rs
@@ -0,0 +1,4 @@
+pub(crate) mod cpu_set;
+pub(crate) mod syscalls;
+pub(crate) mod types;
+pub(crate) mod wait;
diff --git a/vendor/rustix/src/backend/linux_raw/process/syscalls.rs b/vendor/rustix/src/backend/linux_raw/process/syscalls.rs
new file mode 100644
index 0000000..bc00af9
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/process/syscalls.rs
@@ -0,0 +1,603 @@
+//! linux_raw syscalls supporting `rustix::process`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use super::types::RawCpuSet;
+use crate::backend::c;
+#[cfg(all(feature = "alloc", feature = "fs"))]
+use crate::backend::conv::slice_mut;
+use crate::backend::conv::{
+    by_mut, by_ref, c_int, c_uint, negative_pid, pass_usize, raw_fd, ret, ret_c_int,
+    ret_c_int_infallible, ret_c_uint, ret_infallible, ret_owned_fd, ret_usize, size_of,
+    slice_just_addr, zero,
+};
+use crate::fd::{AsRawFd, BorrowedFd, OwnedFd, RawFd};
+#[cfg(feature = "fs")]
+use crate::ffi::CStr;
+use crate::io;
+use crate::pid::RawPid;
+use crate::process::{
+    Cpuid, MembarrierCommand, MembarrierQuery, Pid, PidfdFlags, PidfdGetfdFlags, Resource, Rlimit,
+    Uid, WaitId, WaitOptions, WaitStatus, WaitidOptions, WaitidStatus,
+};
+use crate::signal::Signal;
+use crate::utils::as_mut_ptr;
+use core::mem::MaybeUninit;
+use core::ptr::{null, null_mut};
+use linux_raw_sys::general::{
+    membarrier_cmd, membarrier_cmd_flag, rlimit64, PRIO_PGRP, PRIO_PROCESS, PRIO_USER,
+    RLIM64_INFINITY,
+};
+#[cfg(feature = "fs")]
+use {crate::backend::conv::ret_c_uint_infallible, crate::fs::Mode};
+#[cfg(feature = "alloc")]
+use {crate::backend::conv::slice_just_addr_mut, crate::process::Gid};
+
+// `sched_getcpu` has special optimizations via the vDSO on some architectures.
+#[cfg(any(
+    target_arch = "x86_64",
+    target_arch = "x86",
+    target_arch = "riscv64",
+    target_arch = "powerpc64"
+))]
+pub(crate) use crate::backend::vdso_wrappers::sched_getcpu;
+
+// `sched_getcpu` on platforms without a vDSO entry for it.
+#[cfg(not(any(
+    target_arch = "x86_64",
+    target_arch = "x86",
+    target_arch = "riscv64",
+    target_arch = "powerpc64"
+)))]
+#[inline]
+pub(crate) fn sched_getcpu() -> usize {
+    let mut cpu = MaybeUninit::<u32>::uninit();
+    unsafe {
+        let r = ret(syscall!(__NR_getcpu, &mut cpu, zero(), zero()));
+        debug_assert!(r.is_ok());
+        cpu.assume_init() as usize
+    }
+}
+
+#[cfg(feature = "fs")]
+#[inline]
+pub(crate) fn chdir(filename: &CStr) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_chdir, filename)) }
+}
+
+#[inline]
+pub(crate) fn fchdir(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_fchdir, fd)) }
+}
+
+#[cfg(feature = "fs")]
+#[inline]
+pub(crate) fn chroot(filename: &CStr) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_chroot, filename)) }
+}
+
+#[cfg(all(feature = "alloc", feature = "fs"))]
+#[inline]
+pub(crate) fn getcwd(buf: &mut [MaybeUninit<u8>]) -> io::Result<usize> {
+    let (buf_addr_mut, buf_len) = slice_mut(buf);
+    unsafe { ret_usize(syscall!(__NR_getcwd, buf_addr_mut, buf_len)) }
+}
+
+#[inline]
+pub(crate) fn membarrier_query() -> MembarrierQuery {
+    unsafe {
+        match ret_c_uint(syscall!(
+            __NR_membarrier,
+            c_int(membarrier_cmd::MEMBARRIER_CMD_QUERY as _),
+            c_uint(0)
+        )) {
+            Ok(query) => MembarrierQuery::from_bits_retain(query),
+            Err(_) => MembarrierQuery::empty(),
+        }
+    }
+}
+
+#[inline]
+pub(crate) fn membarrier(cmd: MembarrierCommand) -> io::Result<()> {
+    unsafe { ret(syscall!(__NR_membarrier, cmd, c_uint(0))) }
+}
+
+#[inline]
+pub(crate) fn membarrier_cpu(cmd: MembarrierCommand, cpu: Cpuid) -> io::Result<()> {
+    unsafe {
+        ret(syscall!(
+            __NR_membarrier,
+            cmd,
+            c_uint(membarrier_cmd_flag::MEMBARRIER_CMD_FLAG_CPU as _),
+            cpu
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn getppid() -> Option<Pid> {
+    unsafe {
+        let ppid = ret_c_int_infallible(syscall_readonly!(__NR_getppid));
+        Pid::from_raw(ppid)
+    }
+}
+
+#[inline]
+pub(crate) fn getpgid(pid: Option<Pid>) -> io::Result<Pid> {
+    unsafe {
+        let pgid = ret_c_int(syscall_readonly!(__NR_getpgid, c_int(Pid::as_raw(pid))))?;
+        debug_assert!(pgid > 0);
+        Ok(Pid::from_raw_unchecked(pgid))
+    }
+}
+
+#[inline]
+pub(crate) fn setpgid(pid: Option<Pid>, pgid: Option<Pid>) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_setpgid,
+            c_int(Pid::as_raw(pid)),
+            c_int(Pid::as_raw(pgid))
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn getpgrp() -> Pid {
+    // Use the `getpgrp` syscall if available.
+    #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))]
+    unsafe {
+        let pgid = ret_c_int_infallible(syscall_readonly!(__NR_getpgrp));
+        debug_assert!(pgid > 0);
+        Pid::from_raw_unchecked(pgid)
+    }
+
+    // Otherwise use `getpgrp` and pass it zero.
+    #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))]
+    unsafe {
+        let pgid = ret_c_int_infallible(syscall_readonly!(__NR_getpgid, c_uint(0)));
+        debug_assert!(pgid > 0);
+        Pid::from_raw_unchecked(pgid)
+    }
+}
+
+#[inline]
+pub(crate) fn sched_getaffinity(pid: Option<Pid>, cpuset: &mut RawCpuSet) -> io::Result<()> {
+    unsafe {
+        // The raw Linux syscall returns the size (in bytes) of the `cpumask_t`
+        // data type that is used internally by the kernel to represent the CPU
+        // set bit mask.
+        let size = ret_usize(syscall!(
+            __NR_sched_getaffinity,
+            c_int(Pid::as_raw(pid)),
+            size_of::<RawCpuSet, _>(),
+            by_mut(&mut cpuset.bits)
+        ))?;
+        let bytes = as_mut_ptr(cpuset).cast::<u8>();
+        let rest = bytes.wrapping_add(size);
+        // Zero every byte in the cpuset not set by the kernel.
+        rest.write_bytes(0, core::mem::size_of::<RawCpuSet>() - size);
+        Ok(())
+    }
+}
+
+#[inline]
+pub(crate) fn sched_setaffinity(pid: Option<Pid>, cpuset: &RawCpuSet) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_sched_setaffinity,
+            c_int(Pid::as_raw(pid)),
+            size_of::<RawCpuSet, _>(),
+            slice_just_addr(&cpuset.bits)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn sched_yield() {
+    unsafe {
+        // See the documentation for [`crate::process::sched_yield`] for why
+        // errors are ignored.
+        syscall_readonly!(__NR_sched_yield).decode_void();
+    }
+}
+
+#[cfg(feature = "fs")]
+#[inline]
+pub(crate) fn umask(mode: Mode) -> Mode {
+    unsafe { Mode::from_bits_retain(ret_c_uint_infallible(syscall_readonly!(__NR_umask, mode))) }
+}
+
+#[inline]
+pub(crate) fn nice(inc: i32) -> io::Result<i32> {
+    let priority = (if inc > -40 && inc < 40 {
+        inc + getpriority_process(None)?
+    } else {
+        inc
+    })
+    .clamp(-20, 19);
+    setpriority_process(None, priority)?;
+    Ok(priority)
+}
+
+#[inline]
+pub(crate) fn getpriority_user(uid: Uid) -> io::Result<i32> {
+    unsafe {
+        Ok(20
+            - ret_c_int(syscall_readonly!(
+                __NR_getpriority,
+                c_uint(PRIO_USER),
+                c_uint(uid.as_raw())
+            ))?)
+    }
+}
+
+#[inline]
+pub(crate) fn getpriority_pgrp(pgid: Option<Pid>) -> io::Result<i32> {
+    unsafe {
+        Ok(20
+            - ret_c_int(syscall_readonly!(
+                __NR_getpriority,
+                c_uint(PRIO_PGRP),
+                c_int(Pid::as_raw(pgid))
+            ))?)
+    }
+}
+
+#[inline]
+pub(crate) fn getpriority_process(pid: Option<Pid>) -> io::Result<i32> {
+    unsafe {
+        Ok(20
+            - ret_c_int(syscall_readonly!(
+                __NR_getpriority,
+                c_uint(PRIO_PROCESS),
+                c_int(Pid::as_raw(pid))
+            ))?)
+    }
+}
+
+#[inline]
+pub(crate) fn setpriority_user(uid: Uid, priority: i32) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_setpriority,
+            c_uint(PRIO_USER),
+            c_uint(uid.as_raw()),
+            c_int(priority)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn setpriority_pgrp(pgid: Option<Pid>, priority: i32) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_setpriority,
+            c_uint(PRIO_PGRP),
+            c_int(Pid::as_raw(pgid)),
+            c_int(priority)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn setpriority_process(pid: Option<Pid>, priority: i32) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_setpriority,
+            c_uint(PRIO_PROCESS),
+            c_int(Pid::as_raw(pid)),
+            c_int(priority)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn getrlimit(limit: Resource) -> Rlimit {
+    let mut result = MaybeUninit::<rlimit64>::uninit();
+    unsafe {
+        ret_infallible(syscall!(
+            __NR_prlimit64,
+            c_uint(0),
+            limit,
+            null::<c::c_void>(),
+            &mut result
+        ));
+        rlimit_from_linux(result.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn setrlimit(limit: Resource, new: Rlimit) -> io::Result<()> {
+    unsafe {
+        let lim = rlimit_to_linux(new.clone());
+        match ret(syscall_readonly!(
+            __NR_prlimit64,
+            c_uint(0),
+            limit,
+            by_ref(&lim),
+            null_mut::<c::c_void>()
+        )) {
+            Ok(()) => Ok(()),
+            Err(err) => Err(err),
+        }
+    }
+}
+
+#[inline]
+pub(crate) fn prlimit(pid: Option<Pid>, limit: Resource, new: Rlimit) -> io::Result<Rlimit> {
+    let lim = rlimit_to_linux(new);
+    let mut result = MaybeUninit::<rlimit64>::uninit();
+    unsafe {
+        match ret(syscall!(
+            __NR_prlimit64,
+            c_int(Pid::as_raw(pid)),
+            limit,
+            by_ref(&lim),
+            &mut result
+        )) {
+            Ok(()) => Ok(rlimit_from_linux(result.assume_init())),
+            Err(err) => Err(err),
+        }
+    }
+}
+
+/// Convert a Rust [`Rlimit`] to a C `rlimit64`.
+#[inline]
+fn rlimit_from_linux(lim: rlimit64) -> Rlimit {
+    let current = if lim.rlim_cur == RLIM64_INFINITY as _ {
+        None
+    } else {
+        Some(lim.rlim_cur)
+    };
+    let maximum = if lim.rlim_max == RLIM64_INFINITY as _ {
+        None
+    } else {
+        Some(lim.rlim_max)
+    };
+    Rlimit { current, maximum }
+}
+
+/// Convert a C `rlimit64` to a Rust `Rlimit`.
+#[inline]
+fn rlimit_to_linux(lim: Rlimit) -> rlimit64 {
+    let rlim_cur = match lim.current {
+        Some(r) => r,
+        None => RLIM64_INFINITY as _,
+    };
+    let rlim_max = match lim.maximum {
+        Some(r) => r,
+        None => RLIM64_INFINITY as _,
+    };
+    rlimit64 { rlim_cur, rlim_max }
+}
+
+#[inline]
+pub(crate) fn wait(waitopts: WaitOptions) -> io::Result<Option<(Pid, WaitStatus)>> {
+    _waitpid(!0, waitopts)
+}
+
+#[inline]
+pub(crate) fn waitpid(
+    pid: Option<Pid>,
+    waitopts: WaitOptions,
+) -> io::Result<Option<(Pid, WaitStatus)>> {
+    _waitpid(Pid::as_raw(pid), waitopts)
+}
+
+#[inline]
+pub(crate) fn waitpgid(pgid: Pid, waitopts: WaitOptions) -> io::Result<Option<(Pid, WaitStatus)>> {
+    _waitpid(-pgid.as_raw_nonzero().get(), waitopts)
+}
+
+#[inline]
+pub(crate) fn _waitpid(
+    pid: RawPid,
+    waitopts: WaitOptions,
+) -> io::Result<Option<(Pid, WaitStatus)>> {
+    unsafe {
+        let mut status = MaybeUninit::<u32>::uninit();
+        let pid = ret_c_int(syscall!(
+            __NR_wait4,
+            c_int(pid as _),
+            &mut status,
+            c_int(waitopts.bits() as _),
+            zero()
+        ))?;
+        Ok(Pid::from_raw(pid).map(|pid| (pid, WaitStatus::new(status.assume_init()))))
+    }
+}
+
+#[inline]
+pub(crate) fn waitid(id: WaitId<'_>, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // Get the id to wait on.
+    match id {
+        WaitId::All => _waitid_all(options),
+        WaitId::Pid(pid) => _waitid_pid(pid, options),
+        WaitId::Pgid(pid) => _waitid_pgid(pid, options),
+        WaitId::PidFd(fd) => _waitid_pidfd(fd, options),
+    }
+}
+
+#[inline]
+fn _waitid_all(options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // `waitid` can return successfully without initializing the struct (no
+    // children found when using `WNOHANG`)
+    let mut status = MaybeUninit::<c::siginfo_t>::zeroed();
+    unsafe {
+        ret(syscall!(
+            __NR_waitid,
+            c_uint(c::P_ALL),
+            c_uint(0),
+            by_mut(&mut status),
+            c_int(options.bits() as _),
+            zero()
+        ))?
+    };
+
+    Ok(unsafe { cvt_waitid_status(status) })
+}
+
+#[inline]
+fn _waitid_pid(pid: Pid, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // `waitid` can return successfully without initializing the struct (no
+    // children found when using `WNOHANG`)
+    let mut status = MaybeUninit::<c::siginfo_t>::zeroed();
+    unsafe {
+        ret(syscall!(
+            __NR_waitid,
+            c_uint(c::P_PID),
+            c_int(Pid::as_raw(Some(pid))),
+            by_mut(&mut status),
+            c_int(options.bits() as _),
+            zero()
+        ))?
+    };
+
+    Ok(unsafe { cvt_waitid_status(status) })
+}
+
+#[inline]
+fn _waitid_pgid(pgid: Option<Pid>, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // `waitid` can return successfully without initializing the struct (no
+    // children found when using `WNOHANG`)
+    let mut status = MaybeUninit::<c::siginfo_t>::zeroed();
+    unsafe {
+        ret(syscall!(
+            __NR_waitid,
+            c_uint(c::P_PGID),
+            c_int(Pid::as_raw(pgid)),
+            by_mut(&mut status),
+            c_int(options.bits() as _),
+            zero()
+        ))?
+    };
+
+    Ok(unsafe { cvt_waitid_status(status) })
+}
+
+#[inline]
+fn _waitid_pidfd(fd: BorrowedFd<'_>, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> {
+    // `waitid` can return successfully without initializing the struct (no
+    // children found when using `WNOHANG`)
+    let mut status = MaybeUninit::<c::siginfo_t>::zeroed();
+    unsafe {
+        ret(syscall!(
+            __NR_waitid,
+            c_uint(c::P_PIDFD),
+            c_uint(fd.as_raw_fd() as _),
+            by_mut(&mut status),
+            c_int(options.bits() as _),
+            zero()
+        ))?
+    };
+
+    Ok(unsafe { cvt_waitid_status(status) })
+}
+
+/// Convert a `siginfo_t` to a `WaitidStatus`.
+///
+/// # Safety
+///
+/// The caller must ensure that `status` is initialized and that `waitid`
+/// returned successfully.
+#[inline]
+#[rustfmt::skip]
+unsafe fn cvt_waitid_status(status: MaybeUninit<c::siginfo_t>) -> Option<WaitidStatus> {
+    let status = status.assume_init();
+    if status.__bindgen_anon_1.__bindgen_anon_1._sifields._sigchld._pid == 0 {
+        None
+    } else {
+        Some(WaitidStatus(status))
+    }
+}
+
+#[inline]
+pub(crate) fn getsid(pid: Option<Pid>) -> io::Result<Pid> {
+    unsafe {
+        let pid = ret_c_int(syscall_readonly!(__NR_getsid, c_int(Pid::as_raw(pid))))?;
+        Ok(Pid::from_raw_unchecked(pid))
+    }
+}
+
+#[inline]
+pub(crate) fn setsid() -> io::Result<Pid> {
+    unsafe {
+        let pid = ret_c_int(syscall_readonly!(__NR_setsid))?;
+        Ok(Pid::from_raw_unchecked(pid))
+    }
+}
+
+#[inline]
+pub(crate) fn kill_process(pid: Pid, sig: Signal) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_kill, pid, sig)) }
+}
+
+#[inline]
+pub(crate) fn kill_process_group(pid: Pid, sig: Signal) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_kill, negative_pid(pid), sig)) }
+}
+
+#[inline]
+pub(crate) fn kill_current_process_group(sig: Signal) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_kill, pass_usize(0), sig)) }
+}
+
+#[inline]
+pub(crate) fn test_kill_process(pid: Pid) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_kill, pid, pass_usize(0))) }
+}
+
+#[inline]
+pub(crate) fn test_kill_process_group(pid: Pid) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_kill,
+            negative_pid(pid),
+            pass_usize(0)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn test_kill_current_process_group() -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_kill, pass_usize(0), pass_usize(0))) }
+}
+
+#[inline]
+pub(crate) fn pidfd_getfd(
+    pidfd: BorrowedFd<'_>,
+    targetfd: RawFd,
+    flags: PidfdGetfdFlags,
+) -> io::Result<OwnedFd> {
+    unsafe {
+        ret_owned_fd(syscall_readonly!(
+            __NR_pidfd_getfd,
+            pidfd,
+            raw_fd(targetfd),
+            c_int(flags.bits() as _)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn pidfd_open(pid: Pid, flags: PidfdFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_pidfd_open, pid, flags)) }
+}
+
+#[cfg(feature = "alloc")]
+#[inline]
+pub(crate) fn getgroups(buf: &mut [Gid]) -> io::Result<usize> {
+    let len = buf.len().try_into().map_err(|_| io::Errno::NOMEM)?;
+
+    unsafe {
+        ret_usize(syscall!(
+            __NR_getgroups,
+            c_int(len),
+            slice_just_addr_mut(buf)
+        ))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/process/types.rs b/vendor/rustix/src/backend/linux_raw/process/types.rs
new file mode 100644
index 0000000..841668a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/process/types.rs
@@ -0,0 +1,104 @@
+use linux_raw_sys::general::membarrier_cmd;
+
+/// A command for use with [`membarrier`] and [`membarrier_cpu`].
+///
+/// For `MEMBARRIER_CMD_QUERY`, see [`membarrier_query`].
+///
+/// [`membarrier`]: crate::process::membarrier
+/// [`membarrier_cpu`]: crate::process::membarrier_cpu
+/// [`membarrier_query`]: crate::process::membarrier_query
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+#[repr(u32)]
+pub enum MembarrierCommand {
+    /// `MEMBARRIER_CMD_GLOBAL`
+    #[doc(alias = "Shared")]
+    #[doc(alias = "MEMBARRIER_CMD_SHARED")]
+    Global = membarrier_cmd::MEMBARRIER_CMD_GLOBAL as _,
+    /// `MEMBARRIER_CMD_GLOBAL_EXPEDITED`
+    GlobalExpedited = membarrier_cmd::MEMBARRIER_CMD_GLOBAL_EXPEDITED as _,
+    /// `MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED`
+    RegisterGlobalExpedited = membarrier_cmd::MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED as _,
+    /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED`
+    PrivateExpedited = membarrier_cmd::MEMBARRIER_CMD_PRIVATE_EXPEDITED as _,
+    /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED`
+    RegisterPrivateExpedited = membarrier_cmd::MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED as _,
+    /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE`
+    PrivateExpeditedSyncCore = membarrier_cmd::MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE as _,
+    /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE`
+    RegisterPrivateExpeditedSyncCore =
+        membarrier_cmd::MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE as _,
+    /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ` (since Linux 5.10)
+    PrivateExpeditedRseq = membarrier_cmd::MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ as _,
+    /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ` (since Linux 5.10)
+    RegisterPrivateExpeditedRseq =
+        membarrier_cmd::MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ as _,
+}
+
+/// A resource value for use with [`getrlimit`], [`setrlimit`], and
+/// [`prlimit`].
+///
+/// [`getrlimit`]: crate::process::getrlimit
+/// [`setrlimit`]: crate::process::setrlimit
+/// [`prlimit`]: crate::process::prlimit
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+#[repr(u32)]
+pub enum Resource {
+    /// `RLIMIT_CPU`
+    Cpu = linux_raw_sys::general::RLIMIT_CPU,
+    /// `RLIMIT_FSIZE`
+    Fsize = linux_raw_sys::general::RLIMIT_FSIZE,
+    /// `RLIMIT_DATA`
+    Data = linux_raw_sys::general::RLIMIT_DATA,
+    /// `RLIMIT_STACK`
+    Stack = linux_raw_sys::general::RLIMIT_STACK,
+    /// `RLIMIT_CORE`
+    Core = linux_raw_sys::general::RLIMIT_CORE,
+    /// `RLIMIT_RSS`
+    Rss = linux_raw_sys::general::RLIMIT_RSS,
+    /// `RLIMIT_NPROC`
+    Nproc = linux_raw_sys::general::RLIMIT_NPROC,
+    /// `RLIMIT_NOFILE`
+    Nofile = linux_raw_sys::general::RLIMIT_NOFILE,
+    /// `RLIMIT_MEMLOCK`
+    Memlock = linux_raw_sys::general::RLIMIT_MEMLOCK,
+    /// `RLIMIT_AS`
+    As = linux_raw_sys::general::RLIMIT_AS,
+    /// `RLIMIT_LOCKS`
+    Locks = linux_raw_sys::general::RLIMIT_LOCKS,
+    /// `RLIMIT_SIGPENDING`
+    Sigpending = linux_raw_sys::general::RLIMIT_SIGPENDING,
+    /// `RLIMIT_MSGQUEUE`
+    Msgqueue = linux_raw_sys::general::RLIMIT_MSGQUEUE,
+    /// `RLIMIT_NICE`
+    Nice = linux_raw_sys::general::RLIMIT_NICE,
+    /// `RLIMIT_RTPRIO`
+    Rtprio = linux_raw_sys::general::RLIMIT_RTPRIO,
+    /// `RLIMIT_RTTIME`
+    Rttime = linux_raw_sys::general::RLIMIT_RTTIME,
+}
+
+/// A CPU identifier as a raw integer.
+pub type RawCpuid = u32;
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub(crate) struct RawCpuSet {
+    #[cfg(all(target_pointer_width = "32", not(target_arch = "x86_64")))]
+    pub(crate) bits: [u32; 32],
+    #[cfg(not(all(target_pointer_width = "32", not(target_arch = "x86_64"))))]
+    pub(crate) bits: [u64; 16],
+}
+
+#[inline]
+pub(crate) fn raw_cpu_set_new() -> RawCpuSet {
+    #[cfg(all(target_pointer_width = "32", not(target_arch = "x86_64")))]
+    {
+        RawCpuSet { bits: [0; 32] }
+    }
+    #[cfg(not(all(target_pointer_width = "32", not(target_arch = "x86_64"))))]
+    {
+        RawCpuSet { bits: [0; 16] }
+    }
+}
+
+pub(crate) const CPU_SETSIZE: usize = 8 * core::mem::size_of::<RawCpuSet>();
diff --git a/vendor/rustix/src/backend/linux_raw/process/wait.rs b/vendor/rustix/src/backend/linux_raw/process/wait.rs
new file mode 100644
index 0000000..9af7f2b
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/process/wait.rs
@@ -0,0 +1,68 @@
+// The functions replacing the C macros use the same names as in libc.
+#![allow(non_snake_case, unsafe_code)]
+
+use linux_raw_sys::ctypes::c_int;
+pub(crate) use linux_raw_sys::general::{
+    siginfo_t, WCONTINUED, WEXITED, WNOHANG, WNOWAIT, WSTOPPED, WUNTRACED,
+};
+
+#[inline]
+pub(crate) fn WIFSTOPPED(status: u32) -> bool {
+    (status & 0xff) == 0x7f
+}
+
+#[inline]
+pub(crate) fn WSTOPSIG(status: u32) -> u32 {
+    (status >> 8) & 0xff
+}
+
+#[inline]
+pub(crate) fn WIFCONTINUED(status: u32) -> bool {
+    status == 0xffff
+}
+
+#[inline]
+pub(crate) fn WIFSIGNALED(status: u32) -> bool {
+    ((status & 0x7f) + 1) as i8 >= 2
+}
+
+#[inline]
+pub(crate) fn WTERMSIG(status: u32) -> u32 {
+    status & 0x7f
+}
+
+#[inline]
+pub(crate) fn WIFEXITED(status: u32) -> bool {
+    (status & 0x7f) == 0
+}
+
+#[inline]
+pub(crate) fn WEXITSTATUS(status: u32) -> u32 {
+    (status >> 8) & 0xff
+}
+
+pub(crate) trait SiginfoExt {
+    fn si_code(&self) -> c_int;
+    unsafe fn si_status(&self) -> c_int;
+}
+
+impl SiginfoExt for siginfo_t {
+    #[inline]
+    fn si_code(&self) -> c_int {
+        // SAFETY: This is technically a union access, but it's only a union
+        // with padding.
+        unsafe { self.__bindgen_anon_1.__bindgen_anon_1.si_code }
+    }
+
+    /// Return the exit status or signal number recorded in a `siginfo_t`.
+    ///
+    /// # Safety
+    ///
+    /// `si_signo` must equal `SIGCHLD` (as it is guaranteed to do after a
+    /// `waitid` call).
+    #[inline]
+    #[rustfmt::skip]
+    unsafe fn si_status(&self) -> c_int {
+        self.__bindgen_anon_1.__bindgen_anon_1._sifields._sigchld._status
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/pty/mod.rs b/vendor/rustix/src/backend/linux_raw/pty/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/pty/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/linux_raw/pty/syscalls.rs b/vendor/rustix/src/backend/linux_raw/pty/syscalls.rs
new file mode 100644
index 0000000..b64344f
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/pty/syscalls.rs
@@ -0,0 +1,43 @@
+//! linux_raw syscalls supporting `rustix::pty`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::conv::{by_ref, c_uint, ret};
+use crate::fd::BorrowedFd;
+use crate::io;
+use linux_raw_sys::ioctl::TIOCSPTLCK;
+#[cfg(feature = "alloc")]
+use {
+    crate::backend::c, crate::ffi::CString, crate::path::DecInt, alloc::vec::Vec,
+    core::mem::MaybeUninit, linux_raw_sys::ioctl::TIOCGPTN,
+};
+
+#[cfg(feature = "alloc")]
+#[inline]
+pub(crate) fn ptsname(fd: BorrowedFd<'_>, mut buffer: Vec<u8>) -> io::Result<CString> {
+    unsafe {
+        let mut n = MaybeUninit::<c::c_int>::uninit();
+        ret(syscall!(__NR_ioctl, fd, c_uint(TIOCGPTN), &mut n))?;
+
+        buffer.clear();
+        buffer.extend_from_slice(b"/dev/pts/");
+        buffer.extend_from_slice(DecInt::new(n.assume_init()).as_bytes());
+        buffer.push(b'\0');
+        Ok(CString::from_vec_with_nul_unchecked(buffer))
+    }
+}
+
+#[inline]
+pub(crate) fn unlockpt(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ioctl,
+            fd,
+            c_uint(TIOCSPTLCK),
+            by_ref(&0)
+        ))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/rand/mod.rs b/vendor/rustix/src/backend/linux_raw/rand/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/rand/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/rand/syscalls.rs b/vendor/rustix/src/backend/linux_raw/rand/syscalls.rs
new file mode 100644
index 0000000..c0f497b
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/rand/syscalls.rs
@@ -0,0 +1,19 @@
+//! linux_raw syscalls supporting `rustix::rand`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::conv::{pass_usize, ret_usize};
+use crate::io;
+use crate::rand::GetRandomFlags;
+
+#[inline]
+pub(crate) unsafe fn getrandom(
+    buf: *mut u8,
+    cap: usize,
+    flags: GetRandomFlags,
+) -> io::Result<usize> {
+    ret_usize(syscall!(__NR_getrandom, buf, pass_usize(cap), flags))
+}
diff --git a/vendor/rustix/src/backend/linux_raw/rand/types.rs b/vendor/rustix/src/backend/linux_raw/rand/types.rs
new file mode 100644
index 0000000..9bc857f
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/rand/types.rs
@@ -0,0 +1,20 @@
+use bitflags::bitflags;
+
+bitflags! {
+    /// `GRND_*` flags for use with [`getrandom`].
+    ///
+    /// [`getrandom`]: crate::rand::getrandom
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct GetRandomFlags: u32 {
+        /// `GRND_RANDOM`
+        const RANDOM = linux_raw_sys::general::GRND_RANDOM;
+        /// `GRND_NONBLOCK`
+        const NONBLOCK = linux_raw_sys::general::GRND_NONBLOCK;
+        /// `GRND_INSECURE`
+        const INSECURE = linux_raw_sys::general::GRND_INSECURE;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/reg.rs b/vendor/rustix/src/backend/linux_raw/reg.rs
new file mode 100644
index 0000000..10f95a5
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/reg.rs
@@ -0,0 +1,258 @@
+//! Encapsulation for system call arguments and return values.
+//!
+//! The inline-asm code paths do some amount of reordering of arguments; to
+//! ensure that we don't accidentally misroute an argument or return value, we
+//! use distinct types for each argument index and return value.
+//!
+//! # Safety
+//!
+//! The `ToAsm` and `FromAsm` traits are unsafe to use; they should only be
+//! used by the syscall code which executes actual syscall machine
+//! instructions.
+
+#![allow(unsafe_code)]
+
+use super::c;
+use super::fd::RawFd;
+use core::marker::PhantomData;
+use core::ops::Range;
+
+pub(super) trait ToAsm: private::Sealed {
+    /// Convert `self` to a `usize` ready to be passed to a syscall
+    /// machine instruction.
+    ///
+    /// # Safety
+    ///
+    /// This should be used immediately before the syscall instruction, and the
+    /// returned value shouldn't be used for any other purpose.
+    #[must_use]
+    unsafe fn to_asm(self) -> *mut Opaque;
+}
+
+pub(super) trait FromAsm: private::Sealed {
+    /// Convert `raw` from a value produced by a syscall machine instruction
+    /// into a `Self`.
+    ///
+    /// # Safety
+    ///
+    /// This should be used immediately after the syscall instruction, and the
+    /// operand value shouldn't be used for any other purpose.
+    #[must_use]
+    unsafe fn from_asm(raw: *mut Opaque) -> Self;
+}
+
+/// To preserve provenance, syscall arguments and return values are passed as
+/// pointer types. They need a type to point to, so we define a custom private
+/// type, to prevent it from being used for anything else.
+#[repr(transparent)]
+pub(super) struct Opaque(c::c_void);
+
+// Argument numbers.
+pub(super) struct A0(());
+pub(super) struct A1(());
+pub(super) struct A2(());
+pub(super) struct A3(());
+pub(super) struct A4(());
+pub(super) struct A5(());
+#[cfg(any(target_arch = "mips", target_arch = "mips32r6"))]
+pub(super) struct A6(());
+#[cfg(target_arch = "x86")]
+pub(super) struct SocketArg;
+
+pub(super) trait ArgNumber: private::Sealed {}
+impl ArgNumber for A0 {}
+impl ArgNumber for A1 {}
+impl ArgNumber for A2 {}
+impl ArgNumber for A3 {}
+impl ArgNumber for A4 {}
+impl ArgNumber for A5 {}
+#[cfg(any(target_arch = "mips", target_arch = "mips32r6"))]
+impl ArgNumber for A6 {}
+#[cfg(target_arch = "x86")]
+impl ArgNumber for SocketArg {}
+
+// Return value numbers.
+pub(super) struct R0(());
+
+pub(super) trait RetNumber: private::Sealed {}
+impl RetNumber for R0 {}
+
+/// Syscall arguments use register-sized types. We use a newtype to
+/// discourage accidental misuse of the raw integer values.
+///
+/// This type doesn't implement `Clone` or `Copy`; it should be used exactly
+/// once. And it has a lifetime to ensure that it doesn't outlive any resources
+/// it might be pointing to.
+#[repr(transparent)]
+#[must_use]
+pub(super) struct ArgReg<'a, Num: ArgNumber> {
+    raw: *mut Opaque,
+    _phantom: PhantomData<(&'a (), Num)>,
+}
+
+impl<'a, Num: ArgNumber> ToAsm for ArgReg<'a, Num> {
+    #[inline]
+    unsafe fn to_asm(self) -> *mut Opaque {
+        self.raw
+    }
+}
+
+/// Syscall return values use register-sized types. We use a newtype to
+/// discourage accidental misuse of the raw integer values.
+///
+/// This type doesn't implement `Clone` or `Copy`; it should be used exactly
+/// once.
+#[repr(transparent)]
+#[must_use]
+pub(super) struct RetReg<Num: RetNumber> {
+    raw: *mut Opaque,
+    _phantom: PhantomData<Num>,
+}
+
+impl<Num: RetNumber> RetReg<Num> {
+    #[inline]
+    pub(super) fn decode_usize(self) -> usize {
+        debug_assert!(!(-4095..0).contains(&(self.raw as isize)));
+        self.raw as usize
+    }
+
+    #[inline]
+    pub(super) fn decode_raw_fd(self) -> RawFd {
+        let bits = self.decode_usize();
+        let raw_fd = bits as RawFd;
+
+        // Converting `raw` to `RawFd` should be lossless.
+        debug_assert_eq!(raw_fd as usize, bits);
+
+        raw_fd
+    }
+
+    #[inline]
+    pub(super) fn decode_c_int(self) -> c::c_int {
+        let bits = self.decode_usize();
+        let c_int_ = bits as c::c_int;
+
+        // Converting `raw` to `c_int` should be lossless.
+        debug_assert_eq!(c_int_ as usize, bits);
+
+        c_int_
+    }
+
+    #[inline]
+    pub(super) fn decode_c_uint(self) -> c::c_uint {
+        let bits = self.decode_usize();
+        let c_uint_ = bits as c::c_uint;
+
+        // Converting `raw` to `c_uint` should be lossless.
+        debug_assert_eq!(c_uint_ as usize, bits);
+
+        c_uint_
+    }
+
+    #[inline]
+    pub(super) fn decode_void_star(self) -> *mut c::c_void {
+        self.raw.cast()
+    }
+
+    #[cfg(target_pointer_width = "64")]
+    #[inline]
+    pub(super) fn decode_u64(self) -> u64 {
+        self.decode_usize() as u64
+    }
+
+    #[inline]
+    pub(super) fn decode_void(self) {
+        let ignore = self.decode_usize();
+        debug_assert_eq!(ignore, 0);
+    }
+
+    #[inline]
+    pub(super) fn decode_error_code(self) -> u16 {
+        let bits = self.raw as usize;
+
+        // `raw` must be in `-4095..0`. Linux always returns errors in
+        // `-4095..0`, and we double-check it here.
+        debug_assert!((-4095..0).contains(&(bits as isize)));
+
+        bits as u16
+    }
+
+    #[inline]
+    pub(super) fn is_nonzero(&self) -> bool {
+        !self.raw.is_null()
+    }
+
+    #[inline]
+    pub(super) fn is_negative(&self) -> bool {
+        (self.raw as isize) < 0
+    }
+
+    #[inline]
+    pub(super) fn is_in_range(&self, range: Range<isize>) -> bool {
+        range.contains(&(self.raw as isize))
+    }
+}
+
+impl<Num: RetNumber> FromAsm for RetReg<Num> {
+    #[inline]
+    unsafe fn from_asm(raw: *mut Opaque) -> Self {
+        Self {
+            raw,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+#[repr(transparent)]
+pub(super) struct SyscallNumber<'a> {
+    nr: usize,
+    _phantom: PhantomData<&'a ()>,
+}
+
+impl<'a> ToAsm for SyscallNumber<'a> {
+    #[inline]
+    unsafe fn to_asm(self) -> *mut Opaque {
+        self.nr as usize as *mut Opaque
+    }
+}
+
+/// Encode a system call argument as an `ArgReg`.
+#[inline]
+pub(super) fn raw_arg<'a, Num: ArgNumber>(raw: *mut Opaque) -> ArgReg<'a, Num> {
+    ArgReg {
+        raw,
+        _phantom: PhantomData,
+    }
+}
+
+/// Encode a system call number (a `__NR_*` constant) as a `SyscallNumber`.
+#[inline]
+pub(super) const fn nr<'a>(nr: u32) -> SyscallNumber<'a> {
+    SyscallNumber {
+        nr: nr as usize,
+        _phantom: PhantomData,
+    }
+}
+
+/// Seal our various traits using the technique documented [here].
+///
+/// [here]: https://rust-lang.github.io/api-guidelines/future-proofing.html
+mod private {
+    pub trait Sealed {}
+
+    // Implement for those same types, but no others.
+    impl<'a, Num: super::ArgNumber> Sealed for super::ArgReg<'a, Num> {}
+    impl<Num: super::RetNumber> Sealed for super::RetReg<Num> {}
+    impl<'a> Sealed for super::SyscallNumber<'a> {}
+    impl Sealed for super::A0 {}
+    impl Sealed for super::A1 {}
+    impl Sealed for super::A2 {}
+    impl Sealed for super::A3 {}
+    impl Sealed for super::A4 {}
+    impl Sealed for super::A5 {}
+    #[cfg(any(target_arch = "mips", target_arch = "mips32r6"))]
+    impl Sealed for super::A6 {}
+    #[cfg(target_arch = "x86")]
+    impl Sealed for super::SocketArg {}
+    impl Sealed for super::R0 {}
+}
diff --git a/vendor/rustix/src/backend/linux_raw/runtime/mod.rs b/vendor/rustix/src/backend/linux_raw/runtime/mod.rs
new file mode 100644
index 0000000..0b48649
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/runtime/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod tls;
diff --git a/vendor/rustix/src/backend/linux_raw/runtime/syscalls.rs b/vendor/rustix/src/backend/linux_raw/runtime/syscalls.rs
new file mode 100644
index 0000000..e00acc6
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/runtime/syscalls.rs
@@ -0,0 +1,318 @@
+//! linux_raw syscalls supporting `rustix::runtime`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+#[cfg(target_arch = "x86")]
+use crate::backend::conv::by_mut;
+#[cfg(target_arch = "x86_64")]
+use crate::backend::conv::c_uint;
+use crate::backend::conv::{
+    by_ref, c_int, ret, ret_c_int, ret_c_int_infallible, ret_error, ret_infallible, ret_void_star,
+    size_of, zero,
+};
+#[cfg(feature = "fs")]
+use crate::fd::BorrowedFd;
+use crate::ffi::CStr;
+#[cfg(feature = "fs")]
+use crate::fs::AtFlags;
+use crate::io;
+use crate::pid::{Pid, RawPid};
+use crate::runtime::{Fork, How, Sigaction, Siginfo, Sigset, Stack};
+use crate::signal::Signal;
+use crate::timespec::Timespec;
+use crate::utils::option_as_ptr;
+use core::ffi::c_void;
+use core::mem::MaybeUninit;
+#[cfg(target_pointer_width = "32")]
+use linux_raw_sys::general::__kernel_old_timespec;
+use linux_raw_sys::general::kernel_sigset_t;
+#[cfg(target_arch = "x86_64")]
+use linux_raw_sys::general::ARCH_SET_FS;
+
+#[inline]
+pub(crate) unsafe fn fork() -> io::Result<Fork> {
+    let mut child_pid = MaybeUninit::<RawPid>::uninit();
+
+    // Unix `fork` only returns the child PID in the parent; we'd like it in
+    // the child too, so set `CLONE_CHILD_SETTID` and pass in the address of
+    // a memory location to store it to in the child.
+    //
+    // Architectures differ on the order of the parameters.
+    #[cfg(target_arch = "x86_64")]
+    let pid = ret_c_int(syscall_readonly!(
+        __NR_clone,
+        c_int(c::SIGCHLD | c::CLONE_CHILD_SETTID),
+        zero(),
+        zero(),
+        &mut child_pid,
+        zero()
+    ))?;
+    #[cfg(any(
+        target_arch = "aarch64",
+        target_arch = "arm",
+        target_arch = "mips",
+        target_arch = "mips32r6",
+        target_arch = "mips64",
+        target_arch = "mips64r6",
+        target_arch = "powerpc64",
+        target_arch = "riscv64",
+        target_arch = "x86"
+    ))]
+    let pid = ret_c_int(syscall_readonly!(
+        __NR_clone,
+        c_int(c::SIGCHLD | c::CLONE_CHILD_SETTID),
+        zero(),
+        zero(),
+        zero(),
+        &mut child_pid
+    ))?;
+
+    Ok(if let Some(pid) = Pid::from_raw(pid) {
+        Fork::Parent(pid)
+    } else {
+        Fork::Child(Pid::from_raw_unchecked(child_pid.assume_init()))
+    })
+}
+
+#[cfg(feature = "fs")]
+pub(crate) unsafe fn execveat(
+    dirfd: BorrowedFd<'_>,
+    path: &CStr,
+    args: *const *const u8,
+    env_vars: *const *const u8,
+    flags: AtFlags,
+) -> io::Errno {
+    ret_error(syscall_readonly!(
+        __NR_execveat,
+        dirfd,
+        path,
+        args,
+        env_vars,
+        flags
+    ))
+}
+
+pub(crate) unsafe fn execve(
+    path: &CStr,
+    args: *const *const u8,
+    env_vars: *const *const u8,
+) -> io::Errno {
+    ret_error(syscall_readonly!(__NR_execve, path, args, env_vars))
+}
+
+pub(crate) mod tls {
+    use super::*;
+    #[cfg(target_arch = "x86")]
+    use crate::backend::runtime::tls::UserDesc;
+
+    #[cfg(target_arch = "x86")]
+    #[inline]
+    pub(crate) unsafe fn set_thread_area(u_info: &mut UserDesc) -> io::Result<()> {
+        ret(syscall!(__NR_set_thread_area, by_mut(u_info)))
+    }
+
+    #[cfg(target_arch = "arm")]
+    #[inline]
+    pub(crate) unsafe fn arm_set_tls(data: *mut c::c_void) -> io::Result<()> {
+        ret(syscall_readonly!(__ARM_NR_set_tls, data))
+    }
+
+    #[cfg(target_arch = "x86_64")]
+    #[inline]
+    pub(crate) unsafe fn set_fs(data: *mut c::c_void) {
+        ret_infallible(syscall_readonly!(
+            __NR_arch_prctl,
+            c_uint(ARCH_SET_FS),
+            data,
+            zero(),
+            zero(),
+            zero()
+        ))
+    }
+
+    #[inline]
+    pub(crate) unsafe fn set_tid_address(data: *mut c::c_void) -> Pid {
+        let tid: i32 = ret_c_int_infallible(syscall_readonly!(__NR_set_tid_address, data));
+        Pid::from_raw_unchecked(tid)
+    }
+
+    #[inline]
+    pub(crate) fn exit_thread(code: c::c_int) -> ! {
+        unsafe { syscall_noreturn!(__NR_exit, c_int(code)) }
+    }
+}
+
+#[inline]
+pub(crate) unsafe fn sigaction(signal: Signal, new: Option<Sigaction>) -> io::Result<Sigaction> {
+    let mut old = MaybeUninit::<Sigaction>::uninit();
+    let new = option_as_ptr(new.as_ref());
+    ret(syscall!(
+        __NR_rt_sigaction,
+        signal,
+        new,
+        &mut old,
+        size_of::<kernel_sigset_t, _>()
+    ))?;
+    Ok(old.assume_init())
+}
+
+#[inline]
+pub(crate) unsafe fn sigaltstack(new: Option<Stack>) -> io::Result<Stack> {
+    let mut old = MaybeUninit::<Stack>::uninit();
+    let new = option_as_ptr(new.as_ref());
+    ret(syscall!(__NR_sigaltstack, new, &mut old))?;
+    Ok(old.assume_init())
+}
+
+#[inline]
+pub(crate) unsafe fn tkill(tid: Pid, sig: Signal) -> io::Result<()> {
+    ret(syscall_readonly!(__NR_tkill, tid, sig))
+}
+
+#[inline]
+pub(crate) unsafe fn sigprocmask(how: How, new: Option<&Sigset>) -> io::Result<Sigset> {
+    let mut old = MaybeUninit::<Sigset>::uninit();
+    let new = option_as_ptr(new);
+    ret(syscall!(
+        __NR_rt_sigprocmask,
+        how,
+        new,
+        &mut old,
+        size_of::<kernel_sigset_t, _>()
+    ))?;
+    Ok(old.assume_init())
+}
+
+#[inline]
+pub(crate) fn sigpending() -> Sigset {
+    let mut pending = MaybeUninit::<Sigset>::uninit();
+    unsafe {
+        ret_infallible(syscall!(
+            __NR_rt_sigpending,
+            &mut pending,
+            size_of::<kernel_sigset_t, _>()
+        ));
+        pending.assume_init()
+    }
+}
+
+#[inline]
+pub(crate) fn sigsuspend(set: &Sigset) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_rt_sigsuspend,
+            by_ref(set),
+            size_of::<kernel_sigset_t, _>()
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn sigwait(set: &Sigset) -> io::Result<Signal> {
+    unsafe {
+        match Signal::from_raw(ret_c_int(syscall_readonly!(
+            __NR_rt_sigtimedwait,
+            by_ref(set),
+            zero(),
+            zero(),
+            size_of::<kernel_sigset_t, _>()
+        ))?) {
+            Some(signum) => Ok(signum),
+            None => Err(io::Errno::NOTSUP),
+        }
+    }
+}
+
+#[inline]
+pub(crate) fn sigwaitinfo(set: &Sigset) -> io::Result<Siginfo> {
+    let mut info = MaybeUninit::<Siginfo>::uninit();
+    unsafe {
+        let _signum = ret_c_int(syscall!(
+            __NR_rt_sigtimedwait,
+            by_ref(set),
+            &mut info,
+            zero(),
+            size_of::<kernel_sigset_t, _>()
+        ))?;
+        Ok(info.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn sigtimedwait(set: &Sigset, timeout: Option<Timespec>) -> io::Result<Siginfo> {
+    let mut info = MaybeUninit::<Siginfo>::uninit();
+    let timeout_ptr = option_as_ptr(timeout.as_ref());
+
+    // `rt_sigtimedwait_time64` was introduced in Linux 5.1. The old
+    // `rt_sigtimedwait` syscall is not y2038-compatible on 32-bit
+    // architectures.
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        match ret_c_int(syscall!(
+            __NR_rt_sigtimedwait_time64,
+            by_ref(set),
+            &mut info,
+            timeout_ptr,
+            size_of::<kernel_sigset_t, _>()
+        )) {
+            Ok(_signum) => (),
+            Err(io::Errno::NOSYS) => sigtimedwait_old(set, timeout, &mut info)?,
+            Err(err) => return Err(err),
+        }
+        Ok(info.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        let _signum = ret_c_int(syscall!(
+            __NR_rt_sigtimedwait,
+            by_ref(set),
+            &mut info,
+            timeout_ptr,
+            size_of::<kernel_sigset_t, _>()
+        ))?;
+        Ok(info.assume_init())
+    }
+}
+
+#[cfg(target_pointer_width = "32")]
+unsafe fn sigtimedwait_old(
+    set: &Sigset,
+    timeout: Option<Timespec>,
+    info: &mut MaybeUninit<Siginfo>,
+) -> io::Result<()> {
+    let old_timeout = match timeout {
+        Some(timeout) => Some(__kernel_old_timespec {
+            tv_sec: timeout.tv_sec.try_into().map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: timeout.tv_nsec as _,
+        }),
+        None => None,
+    };
+
+    let old_timeout_ptr = option_as_ptr(old_timeout.as_ref());
+
+    let _signum = ret_c_int(syscall!(
+        __NR_rt_sigtimedwait,
+        by_ref(set),
+        info,
+        old_timeout_ptr,
+        size_of::<kernel_sigset_t, _>()
+    ))?;
+
+    Ok(())
+}
+
+#[inline]
+pub(crate) fn exit_group(code: c::c_int) -> ! {
+    unsafe { syscall_noreturn!(__NR_exit_group, c_int(code)) }
+}
+
+#[inline]
+pub(crate) unsafe fn brk(addr: *mut c::c_void) -> io::Result<*mut c_void> {
+    // This is non-`readonly`, to prevent loads from being reordered past it.
+    ret_void_star(syscall!(__NR_brk, addr))
+}
diff --git a/vendor/rustix/src/backend/linux_raw/runtime/tls.rs b/vendor/rustix/src/backend/linux_raw/runtime/tls.rs
new file mode 100644
index 0000000..69bd5ce
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/runtime/tls.rs
@@ -0,0 +1,98 @@
+//! TLS utilities.
+//!
+//! # Safety
+//!
+//! This file contains code that reads the raw phdr array pointed to by the
+//! kernel-provided AUXV values.
+#![allow(unsafe_code)]
+
+use crate::backend::c;
+use crate::backend::param::auxv::exe_phdrs;
+use core::arch::global_asm;
+use core::ptr::{null, NonNull};
+use linux_raw_sys::elf::*;
+
+/// For use with [`set_thread_area`].
+///
+/// [`set_thread_area`]: crate::runtime::set_thread_area
+#[cfg(target_arch = "x86")]
+pub type UserDesc = linux_raw_sys::general::user_desc;
+
+pub(crate) fn startup_tls_info() -> StartupTlsInfo {
+    let mut base = null();
+    let mut tls_phdr = null();
+    let mut stack_size = 0;
+
+    let (first_phdr, phent, phnum) = exe_phdrs();
+    let mut current_phdr = first_phdr.cast::<Elf_Phdr>();
+
+    // The dynamic address of the dynamic section, which we can compare with
+    // the `PT_DYNAMIC` header's static address, if present.
+    let dynamic_addr: *const c::c_void = unsafe { &_DYNAMIC };
+
+    // SAFETY: We assume the phdr array pointer and length the kernel provided
+    // to the process describe a valid phdr array.
+    unsafe {
+        let phdrs_end = current_phdr.cast::<u8>().add(phnum * phent).cast();
+        while current_phdr != phdrs_end {
+            let phdr = &*current_phdr;
+            current_phdr = current_phdr.cast::<u8>().add(phent).cast();
+
+            match phdr.p_type {
+                // Compute the offset from the static virtual addresses
+                // in the `p_vaddr` fields to the dynamic addresses. We don't
+                // always get a `PT_PHDR` or `PT_DYNAMIC` header, so use
+                // whichever one we get.
+                PT_PHDR => base = first_phdr.cast::<u8>().wrapping_sub(phdr.p_vaddr),
+                PT_DYNAMIC => base = dynamic_addr.cast::<u8>().wrapping_sub(phdr.p_vaddr),
+
+                PT_TLS => tls_phdr = phdr,
+                PT_GNU_STACK => stack_size = phdr.p_memsz,
+                _ => {}
+            }
+        }
+
+        if tls_phdr.is_null() {
+            StartupTlsInfo {
+                addr: NonNull::dangling().as_ptr(),
+                mem_size: 0,
+                file_size: 0,
+                align: 1,
+                stack_size: 0,
+            }
+        } else {
+            StartupTlsInfo {
+                addr: base.cast::<u8>().wrapping_add((*tls_phdr).p_vaddr).cast(),
+                mem_size: (*tls_phdr).p_memsz,
+                file_size: (*tls_phdr).p_filesz,
+                align: (*tls_phdr).p_align,
+                stack_size,
+            }
+        }
+    }
+}
+
+extern "C" {
+    /// Declare the `_DYNAMIC` symbol so that we can compare its address with
+    /// the static address in the `PT_DYNAMIC` header to learn our offset. Use
+    /// a weak symbol because `_DYNAMIC` is not always present.
+    static _DYNAMIC: c::c_void;
+}
+// Rust has `extern_weak` but it isn't stable, so use a `global_asm`.
+global_asm!(".weak _DYNAMIC");
+
+/// The values returned from [`startup_tls_info`].
+///
+/// [`startup_tls_info`]: crate::runtime::startup_tls_info
+pub struct StartupTlsInfo {
+    /// The base address of the TLS segment.
+    pub addr: *const c::c_void,
+    /// The size of the memory region.
+    pub mem_size: usize,
+    /// The size beyond which all memory is zero-initialized.
+    pub file_size: usize,
+    /// The required alignment for the TLS segment.
+    pub align: usize,
+    /// The requested minimum size for stacks.
+    pub stack_size: usize,
+}
diff --git a/vendor/rustix/src/backend/linux_raw/shm/mod.rs b/vendor/rustix/src/backend/linux_raw/shm/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/shm/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/shm/syscalls.rs b/vendor/rustix/src/backend/linux_raw/shm/syscalls.rs
new file mode 100644
index 0000000..3b083f4
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/shm/syscalls.rs
@@ -0,0 +1,47 @@
+use crate::ffi::CStr;
+
+use crate::backend::fs::syscalls::{open, unlink};
+use crate::backend::fs::types::{Mode, OFlags};
+use crate::fd::OwnedFd;
+use crate::io;
+use crate::shm::ShmOFlags;
+
+const NAME_MAX: usize = 255;
+const SHM_DIR: &[u8] = b"/dev/shm/";
+
+fn get_shm_name(name: &CStr) -> io::Result<([u8; NAME_MAX + SHM_DIR.len() + 1], usize)> {
+    let name = name.to_bytes();
+
+    if name.len() > NAME_MAX {
+        return Err(io::Errno::NAMETOOLONG);
+    }
+
+    let num_slashes = name.iter().take_while(|x| **x == b'/').count();
+    let after_slashes = &name[num_slashes..];
+    if after_slashes.is_empty()
+        || after_slashes == b"."
+        || after_slashes == b".."
+        || after_slashes.contains(&b'/')
+    {
+        return Err(io::Errno::INVAL);
+    }
+
+    let mut path = [0; NAME_MAX + SHM_DIR.len() + 1];
+    path[..SHM_DIR.len()].copy_from_slice(SHM_DIR);
+    path[SHM_DIR.len()..SHM_DIR.len() + name.len()].copy_from_slice(name);
+    Ok((path, SHM_DIR.len() + name.len() + 1))
+}
+
+pub(crate) fn shm_open(name: &CStr, oflags: ShmOFlags, mode: Mode) -> io::Result<OwnedFd> {
+    let (path, len) = get_shm_name(name)?;
+    open(
+        CStr::from_bytes_with_nul(&path[..len]).unwrap(),
+        OFlags::from_bits(oflags.bits()).unwrap() | OFlags::CLOEXEC,
+        mode,
+    )
+}
+
+pub(crate) fn shm_unlink(name: &CStr) -> io::Result<()> {
+    let (path, len) = get_shm_name(name)?;
+    unlink(CStr::from_bytes_with_nul(&path[..len]).unwrap())
+}
diff --git a/vendor/rustix/src/backend/linux_raw/shm/types.rs b/vendor/rustix/src/backend/linux_raw/shm/types.rs
new file mode 100644
index 0000000..3343d44
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/shm/types.rs
@@ -0,0 +1,30 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+bitflags! {
+    /// `O_*` constants for use with [`shm_open`].
+    ///
+    /// [`shm_open`]: crate:shm::shm_open
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct ShmOFlags: c::c_uint {
+        /// `O_CREAT`
+        #[doc(alias = "CREAT")]
+        const CREATE = linux_raw_sys::general::O_CREAT;
+
+        /// `O_EXCL`
+        const EXCL = linux_raw_sys::general::O_EXCL;
+
+        /// `O_RDONLY`
+        const RDONLY = linux_raw_sys::general::O_RDONLY;
+
+        /// `O_RDWR`
+        const RDWR = linux_raw_sys::general::O_RDWR;
+
+        /// `O_TRUNC`
+        const TRUNC = linux_raw_sys::general::O_TRUNC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/system/mod.rs b/vendor/rustix/src/backend/linux_raw/system/mod.rs
new file mode 100644
index 0000000..1e0181a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/system/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/system/syscalls.rs b/vendor/rustix/src/backend/linux_raw/system/syscalls.rs
new file mode 100644
index 0000000..6b41cdb
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/system/syscalls.rs
@@ -0,0 +1,49 @@
+//! linux_raw syscalls supporting `rustix::system`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use super::types::RawUname;
+use crate::backend::c;
+use crate::backend::conv::{c_int, ret, ret_infallible, slice};
+use crate::io;
+use crate::system::{RebootCommand, Sysinfo};
+use core::mem::MaybeUninit;
+
+#[inline]
+pub(crate) fn uname() -> RawUname {
+    let mut uname = MaybeUninit::<RawUname>::uninit();
+    unsafe {
+        ret_infallible(syscall!(__NR_uname, &mut uname));
+        uname.assume_init()
+    }
+}
+
+#[inline]
+pub(crate) fn sysinfo() -> Sysinfo {
+    let mut info = MaybeUninit::<Sysinfo>::uninit();
+    unsafe {
+        ret_infallible(syscall!(__NR_sysinfo, &mut info));
+        info.assume_init()
+    }
+}
+
+#[inline]
+pub(crate) fn sethostname(name: &[u8]) -> io::Result<()> {
+    let (ptr, len) = slice(name);
+    unsafe { ret(syscall_readonly!(__NR_sethostname, ptr, len)) }
+}
+
+#[inline]
+pub(crate) fn reboot(cmd: RebootCommand) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_reboot,
+            c_int(c::LINUX_REBOOT_MAGIC1),
+            c_int(c::LINUX_REBOOT_MAGIC2),
+            c_int(cmd as i32)
+        ))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/system/types.rs b/vendor/rustix/src/backend/linux_raw/system/types.rs
new file mode 100644
index 0000000..4729273
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/system/types.rs
@@ -0,0 +1,4 @@
+/// `sysinfo`
+pub type Sysinfo = linux_raw_sys::system::sysinfo;
+
+pub(crate) type RawUname = linux_raw_sys::system::new_utsname;
diff --git a/vendor/rustix/src/backend/linux_raw/termios/mod.rs b/vendor/rustix/src/backend/linux_raw/termios/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/termios/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/linux_raw/termios/syscalls.rs b/vendor/rustix/src/backend/linux_raw/termios/syscalls.rs
new file mode 100644
index 0000000..5a24c0a
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/termios/syscalls.rs
@@ -0,0 +1,330 @@
+//! linux_raw syscalls supporting `rustix::termios`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+use crate::backend::conv::{by_ref, c_uint, ret};
+use crate::fd::BorrowedFd;
+use crate::io;
+use crate::pid::Pid;
+#[cfg(all(feature = "alloc", feature = "procfs"))]
+use crate::procfs;
+use crate::termios::{
+    Action, ControlModes, InputModes, LocalModes, OptionalActions, OutputModes, QueueSelector,
+    SpecialCodeIndex, Termios, Winsize,
+};
+#[cfg(all(feature = "alloc", feature = "procfs"))]
+use crate::{ffi::CStr, fs::FileType, path::DecInt};
+use core::mem::MaybeUninit;
+use linux_raw_sys::general::IBSHIFT;
+use linux_raw_sys::ioctl::{
+    TCFLSH, TCSBRK, TCXONC, TIOCGPGRP, TIOCGSID, TIOCGWINSZ, TIOCSPGRP, TIOCSWINSZ,
+};
+
+#[inline]
+pub(crate) fn tcgetwinsize(fd: BorrowedFd<'_>) -> io::Result<Winsize> {
+    unsafe {
+        let mut result = MaybeUninit::<Winsize>::uninit();
+        ret(syscall!(__NR_ioctl, fd, c_uint(TIOCGWINSZ), &mut result))?;
+        Ok(result.assume_init())
+    }
+}
+
+#[inline]
+pub(crate) fn tcgetattr(fd: BorrowedFd<'_>) -> io::Result<Termios> {
+    unsafe {
+        let mut result = MaybeUninit::<Termios>::uninit();
+
+        // QEMU's `TCGETS2` doesn't currently set `input_speed` or
+        // `output_speed` on PowerPC, so zero out the fields ourselves.
+        #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
+        {
+            result.write(core::mem::zeroed());
+        }
+
+        ret(syscall!(__NR_ioctl, fd, c_uint(c::TCGETS2), &mut result))?;
+
+        let result = result.assume_init();
+
+        // QEMU's `TCGETS2` doesn't currently set `input_speed` or
+        // `output_speed` on PowerPC, so set them manually if we can.
+        #[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
+        let result = {
+            use crate::termios::speed;
+            let mut result = result;
+            if result.output_speed == 0 && (result.control_modes.bits() & c::CBAUD) != c::BOTHER {
+                if let Some(output_speed) = speed::decode(result.control_modes.bits() & c::CBAUD) {
+                    result.output_speed = output_speed;
+                }
+            }
+            if result.input_speed == 0
+                && ((result.control_modes.bits() & c::CIBAUD) >> c::IBSHIFT) != c::BOTHER
+            {
+                // For input speeds, `B0` is special-cased to mean the input
+                // speed is the same as the output speed.
+                if ((result.control_modes.bits() & c::CIBAUD) >> c::IBSHIFT) == c::B0 {
+                    result.input_speed = result.output_speed;
+                } else if let Some(input_speed) =
+                    speed::decode((result.control_modes.bits() & c::CIBAUD) >> c::IBSHIFT)
+                {
+                    result.input_speed = input_speed;
+                }
+            }
+            result
+        };
+
+        Ok(result)
+    }
+}
+
+#[inline]
+pub(crate) fn tcgetpgrp(fd: BorrowedFd<'_>) -> io::Result<Pid> {
+    unsafe {
+        let mut result = MaybeUninit::<c::pid_t>::uninit();
+        ret(syscall!(__NR_ioctl, fd, c_uint(TIOCGPGRP), &mut result))?;
+        let pid = result.assume_init();
+
+        // This doesn't appear to be documented, but it appears `tcsetpgrp` can
+        // succceed and set the pid to 0 if we pass it a pseudo-terminal device
+        // fd. For now, fail with `OPNOTSUPP`.
+        if pid == 0 {
+            return Err(io::Errno::OPNOTSUPP);
+        }
+
+        Ok(Pid::from_raw_unchecked(pid))
+    }
+}
+
+#[inline]
+pub(crate) fn tcsetattr(
+    fd: BorrowedFd<'_>,
+    optional_actions: OptionalActions,
+    termios: &Termios,
+) -> io::Result<()> {
+    // Translate from `optional_actions` into an ioctl request code. On MIPS,
+    // `optional_actions` already has `TCGETS` added to it.
+    let request = linux_raw_sys::ioctl::TCSETS2
+        + if cfg!(any(
+            target_arch = "mips",
+            target_arch = "mips32r6",
+            target_arch = "mips64",
+            target_arch = "mips64r6"
+        )) {
+            optional_actions as u32 - linux_raw_sys::ioctl::TCSETS
+        } else {
+            optional_actions as u32
+        };
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ioctl,
+            fd,
+            c_uint(request),
+            by_ref(termios)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn tcsendbreak(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_ioctl, fd, c_uint(TCSBRK), c_uint(0))) }
+}
+
+#[inline]
+pub(crate) fn tcdrain(fd: BorrowedFd<'_>) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_ioctl, fd, c_uint(TCSBRK), c_uint(1))) }
+}
+
+#[inline]
+pub(crate) fn tcflush(fd: BorrowedFd<'_>, queue_selector: QueueSelector) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ioctl,
+            fd,
+            c_uint(TCFLSH),
+            c_uint(queue_selector as u32)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn tcflow(fd: BorrowedFd<'_>, action: Action) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ioctl,
+            fd,
+            c_uint(TCXONC),
+            c_uint(action as u32)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn tcgetsid(fd: BorrowedFd<'_>) -> io::Result<Pid> {
+    unsafe {
+        let mut result = MaybeUninit::<c::pid_t>::uninit();
+        ret(syscall!(__NR_ioctl, fd, c_uint(TIOCGSID), &mut result))?;
+        let pid = result.assume_init();
+        Ok(Pid::from_raw_unchecked(pid))
+    }
+}
+
+#[inline]
+pub(crate) fn tcsetwinsize(fd: BorrowedFd<'_>, winsize: Winsize) -> io::Result<()> {
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ioctl,
+            fd,
+            c_uint(TIOCSWINSZ),
+            by_ref(&winsize)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn tcsetpgrp(fd: BorrowedFd<'_>, pid: Pid) -> io::Result<()> {
+    let raw_pid: c::c_int = pid.as_raw_nonzero().get();
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_ioctl,
+            fd,
+            c_uint(TIOCSPGRP),
+            by_ref(&raw_pid)
+        ))
+    }
+}
+
+/// A wrapper around a conceptual `cfsetspeed` which handles an arbitrary
+/// integer speed value.
+#[inline]
+pub(crate) fn set_speed(termios: &mut Termios, arbitrary_speed: u32) -> io::Result<()> {
+    let encoded_speed = crate::termios::speed::encode(arbitrary_speed).unwrap_or(c::BOTHER);
+
+    debug_assert_eq!(encoded_speed & !c::CBAUD, 0);
+
+    termios.control_modes -= ControlModes::from_bits_retain(c::CBAUD | c::CIBAUD);
+    termios.control_modes |=
+        ControlModes::from_bits_retain(encoded_speed | (encoded_speed << IBSHIFT));
+
+    termios.input_speed = arbitrary_speed;
+    termios.output_speed = arbitrary_speed;
+
+    Ok(())
+}
+
+/// A wrapper around a conceptual `cfsetospeed` which handles an arbitrary
+/// integer speed value.
+#[inline]
+pub(crate) fn set_output_speed(termios: &mut Termios, arbitrary_speed: u32) -> io::Result<()> {
+    let encoded_speed = crate::termios::speed::encode(arbitrary_speed).unwrap_or(c::BOTHER);
+
+    debug_assert_eq!(encoded_speed & !c::CBAUD, 0);
+
+    termios.control_modes -= ControlModes::from_bits_retain(c::CBAUD);
+    termios.control_modes |= ControlModes::from_bits_retain(encoded_speed);
+
+    termios.output_speed = arbitrary_speed;
+
+    Ok(())
+}
+
+/// A wrapper around a conceptual `cfsetispeed` which handles an arbitrary
+/// integer speed value.
+#[inline]
+pub(crate) fn set_input_speed(termios: &mut Termios, arbitrary_speed: u32) -> io::Result<()> {
+    let encoded_speed = crate::termios::speed::encode(arbitrary_speed).unwrap_or(c::BOTHER);
+
+    debug_assert_eq!(encoded_speed & !c::CBAUD, 0);
+
+    termios.control_modes -= ControlModes::from_bits_retain(c::CIBAUD);
+    termios.control_modes |= ControlModes::from_bits_retain(encoded_speed << IBSHIFT);
+
+    termios.input_speed = arbitrary_speed;
+
+    Ok(())
+}
+
+#[inline]
+pub(crate) fn cfmakeraw(termios: &mut Termios) {
+    // From the Linux [`cfmakeraw` manual page]:
+    //
+    // [`cfmakeraw` manual page]: https://man7.org/linux/man-pages/man3/cfmakeraw.3.html
+    termios.input_modes -= InputModes::IGNBRK
+        | InputModes::BRKINT
+        | InputModes::PARMRK
+        | InputModes::ISTRIP
+        | InputModes::INLCR
+        | InputModes::IGNCR
+        | InputModes::ICRNL
+        | InputModes::IXON;
+    termios.output_modes -= OutputModes::OPOST;
+    termios.local_modes -= LocalModes::ECHO
+        | LocalModes::ECHONL
+        | LocalModes::ICANON
+        | LocalModes::ISIG
+        | LocalModes::IEXTEN;
+    termios.control_modes -= ControlModes::CSIZE | ControlModes::PARENB;
+    termios.control_modes |= ControlModes::CS8;
+
+    // Musl and glibc also do these:
+    termios.special_codes[SpecialCodeIndex::VMIN] = 1;
+    termios.special_codes[SpecialCodeIndex::VTIME] = 0;
+}
+
+#[inline]
+pub(crate) fn isatty(fd: BorrowedFd<'_>) -> bool {
+    // On error, Linux will return either `EINVAL` (2.6.32) or `ENOTTY`
+    // (otherwise), because we assume we're never passing an invalid
+    // file descriptor (which would get `EBADF`). Either way, an error
+    // means we don't have a tty.
+    tcgetwinsize(fd).is_ok()
+}
+
+#[cfg(all(feature = "alloc", feature = "procfs"))]
+pub(crate) fn ttyname(fd: BorrowedFd<'_>, buf: &mut [MaybeUninit<u8>]) -> io::Result<usize> {
+    let fd_stat = crate::backend::fs::syscalls::fstat(fd)?;
+
+    // Quick check: if `fd` isn't a character device, it's not a tty.
+    if FileType::from_raw_mode(fd_stat.st_mode) != FileType::CharacterDevice {
+        return Err(io::Errno::NOTTY);
+    }
+
+    // Check that `fd` is really a tty.
+    tcgetwinsize(fd)?;
+
+    // Get a fd to "/proc/self/fd".
+    let proc_self_fd = procfs::proc_self_fd()?;
+
+    // Gather the ttyname by reading the "fd" file inside `proc_self_fd`.
+    let r = crate::backend::fs::syscalls::readlinkat(
+        proc_self_fd,
+        DecInt::from_fd(fd).as_c_str(),
+        buf,
+    )?;
+
+    // If the number of bytes is equal to the buffer length, truncation may
+    // have occurred. This check also ensures that we have enough space for
+    // adding a NUL terminator.
+    if r == buf.len() {
+        return Err(io::Errno::RANGE);
+    }
+
+    // `readlinkat` returns the number of bytes placed in the buffer.
+    // NUL-terminate the string at that offset.
+    buf[r].write(b'\0');
+
+    // Check that the path we read refers to the same file as `fd`.
+    {
+        // SAFETY: We just wrote the NUL byte above
+        let path = unsafe { CStr::from_ptr(buf.as_ptr().cast()) };
+
+        let path_stat = crate::backend::fs::syscalls::stat(path)?;
+        if path_stat.st_dev != fd_stat.st_dev || path_stat.st_ino != fd_stat.st_ino {
+            return Err(io::Errno::NODEV);
+        }
+    }
+
+    Ok(r)
+}
diff --git a/vendor/rustix/src/backend/linux_raw/thread/futex.rs b/vendor/rustix/src/backend/linux_raw/thread/futex.rs
new file mode 100644
index 0000000..263e980
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/thread/futex.rs
@@ -0,0 +1,45 @@
+bitflags::bitflags! {
+    /// `FUTEX_*` flags for use with [`futex`].
+    ///
+    /// [`futex`]: crate::thread::futex
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct FutexFlags: u32 {
+        /// `FUTEX_PRIVATE_FLAG`
+        const PRIVATE = linux_raw_sys::general::FUTEX_PRIVATE_FLAG;
+        /// `FUTEX_CLOCK_REALTIME`
+        const CLOCK_REALTIME = linux_raw_sys::general::FUTEX_CLOCK_REALTIME;
+
+        // This deliberately lacks a `const _ = !0`, so that users can use
+        // `from_bits_truncate` to extract the `SocketFlags` from a flags
+        // value that also includes a `SocketType`.
+    }
+}
+
+/// `FUTEX_*` operations for use with [`futex`].
+///
+/// [`futex`]: crate::thread::futex
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+#[repr(u32)]
+pub enum FutexOperation {
+    /// `FUTEX_WAIT`
+    Wait = linux_raw_sys::general::FUTEX_WAIT,
+    /// `FUTEX_WAKE`
+    Wake = linux_raw_sys::general::FUTEX_WAKE,
+    /// `FUTEX_FD`
+    Fd = linux_raw_sys::general::FUTEX_FD,
+    /// `FUTEX_REQUEUE`
+    Requeue = linux_raw_sys::general::FUTEX_REQUEUE,
+    /// `FUTEX_CMP_REQUEUE`
+    CmpRequeue = linux_raw_sys::general::FUTEX_CMP_REQUEUE,
+    /// `FUTEX_WAKE_OP`
+    WakeOp = linux_raw_sys::general::FUTEX_WAKE_OP,
+    /// `FUTEX_LOCK_PI`
+    LockPi = linux_raw_sys::general::FUTEX_LOCK_PI,
+    /// `FUTEX_UNLOCK_PI`
+    UnlockPi = linux_raw_sys::general::FUTEX_UNLOCK_PI,
+    /// `FUTEX_TRYLOCK_PI`
+    TrylockPi = linux_raw_sys::general::FUTEX_TRYLOCK_PI,
+    /// `FUTEX_WAIT_BITSET`
+    WaitBitset = linux_raw_sys::general::FUTEX_WAIT_BITSET,
+}
diff --git a/vendor/rustix/src/backend/linux_raw/thread/mod.rs b/vendor/rustix/src/backend/linux_raw/thread/mod.rs
new file mode 100644
index 0000000..6a002c6
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/thread/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod futex;
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/linux_raw/thread/syscalls.rs b/vendor/rustix/src/backend/linux_raw/thread/syscalls.rs
new file mode 100644
index 0000000..0095eed
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/thread/syscalls.rs
@@ -0,0 +1,347 @@
+//! linux_raw syscalls supporting `rustix::thread`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+use crate::backend::conv::{
+    by_mut, by_ref, c_int, c_uint, ret, ret_c_int, ret_c_int_infallible, ret_usize,
+    slice_just_addr, slice_just_addr_mut, zero,
+};
+use crate::fd::BorrowedFd;
+use crate::io;
+use crate::pid::Pid;
+use crate::thread::{ClockId, FutexFlags, FutexOperation, NanosleepRelativeResult, Timespec};
+use core::mem::MaybeUninit;
+#[cfg(target_pointer_width = "32")]
+use linux_raw_sys::general::timespec as __kernel_old_timespec;
+use linux_raw_sys::general::{__kernel_timespec, TIMER_ABSTIME};
+
+#[inline]
+pub(crate) fn clock_nanosleep_relative(
+    id: ClockId,
+    req: &__kernel_timespec,
+) -> NanosleepRelativeResult {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        let mut rem = MaybeUninit::<__kernel_timespec>::uninit();
+        match ret(syscall!(
+            __NR_clock_nanosleep_time64,
+            id,
+            c_int(0),
+            by_ref(req),
+            &mut rem
+        ))
+        .or_else(|err| {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            if err == io::Errno::NOSYS {
+                clock_nanosleep_relative_old(id, req, &mut rem)
+            } else {
+                Err(err)
+            }
+        }) {
+            Ok(()) => NanosleepRelativeResult::Ok,
+            Err(io::Errno::INTR) => NanosleepRelativeResult::Interrupted(rem.assume_init()),
+            Err(err) => NanosleepRelativeResult::Err(err),
+        }
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        let mut rem = MaybeUninit::<__kernel_timespec>::uninit();
+        match ret(syscall!(
+            __NR_clock_nanosleep,
+            id,
+            c_int(0),
+            by_ref(req),
+            &mut rem
+        )) {
+            Ok(()) => NanosleepRelativeResult::Ok,
+            Err(io::Errno::INTR) => NanosleepRelativeResult::Interrupted(rem.assume_init()),
+            Err(err) => NanosleepRelativeResult::Err(err),
+        }
+    }
+}
+
+#[cfg(target_pointer_width = "32")]
+unsafe fn clock_nanosleep_relative_old(
+    id: ClockId,
+    req: &__kernel_timespec,
+    rem: &mut MaybeUninit<__kernel_timespec>,
+) -> io::Result<()> {
+    let old_req = __kernel_old_timespec {
+        tv_sec: req.tv_sec.try_into().map_err(|_| io::Errno::INVAL)?,
+        tv_nsec: req.tv_nsec.try_into().map_err(|_| io::Errno::INVAL)?,
+    };
+    let mut old_rem = MaybeUninit::<__kernel_old_timespec>::uninit();
+    ret(syscall!(
+        __NR_clock_nanosleep,
+        id,
+        c_int(0),
+        by_ref(&old_req),
+        &mut old_rem
+    ))?;
+    let old_rem = old_rem.assume_init();
+    rem.write(__kernel_timespec {
+        tv_sec: old_rem.tv_sec.into(),
+        tv_nsec: old_rem.tv_nsec.into(),
+    });
+    Ok(())
+}
+
+#[inline]
+pub(crate) fn clock_nanosleep_absolute(id: ClockId, req: &__kernel_timespec) -> io::Result<()> {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_clock_nanosleep_time64,
+            id,
+            c_uint(TIMER_ABSTIME),
+            by_ref(req),
+            zero()
+        ))
+        .or_else(|err| {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            if err == io::Errno::NOSYS {
+                clock_nanosleep_absolute_old(id, req)
+            } else {
+                Err(err)
+            }
+        })
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_clock_nanosleep,
+            id,
+            c_uint(TIMER_ABSTIME),
+            by_ref(req),
+            zero()
+        ))
+    }
+}
+
+#[cfg(target_pointer_width = "32")]
+unsafe fn clock_nanosleep_absolute_old(id: ClockId, req: &__kernel_timespec) -> io::Result<()> {
+    let old_req = __kernel_old_timespec {
+        tv_sec: req.tv_sec.try_into().map_err(|_| io::Errno::INVAL)?,
+        tv_nsec: req.tv_nsec.try_into().map_err(|_| io::Errno::INVAL)?,
+    };
+    ret(syscall_readonly!(
+        __NR_clock_nanosleep,
+        id,
+        c_int(0),
+        by_ref(&old_req),
+        zero()
+    ))
+}
+
+#[inline]
+pub(crate) fn nanosleep(req: &__kernel_timespec) -> NanosleepRelativeResult {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        let mut rem = MaybeUninit::<__kernel_timespec>::uninit();
+        match ret(syscall!(
+            __NR_clock_nanosleep_time64,
+            ClockId::Realtime,
+            c_int(0),
+            by_ref(req),
+            &mut rem
+        ))
+        .or_else(|err| {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            if err == io::Errno::NOSYS {
+                nanosleep_old(req, &mut rem)
+            } else {
+                Err(err)
+            }
+        }) {
+            Ok(()) => NanosleepRelativeResult::Ok,
+            Err(io::Errno::INTR) => NanosleepRelativeResult::Interrupted(rem.assume_init()),
+            Err(err) => NanosleepRelativeResult::Err(err),
+        }
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        let mut rem = MaybeUninit::<__kernel_timespec>::uninit();
+        match ret(syscall!(__NR_nanosleep, by_ref(req), &mut rem)) {
+            Ok(()) => NanosleepRelativeResult::Ok,
+            Err(io::Errno::INTR) => NanosleepRelativeResult::Interrupted(rem.assume_init()),
+            Err(err) => NanosleepRelativeResult::Err(err),
+        }
+    }
+}
+
+#[cfg(target_pointer_width = "32")]
+unsafe fn nanosleep_old(
+    req: &__kernel_timespec,
+    rem: &mut MaybeUninit<__kernel_timespec>,
+) -> io::Result<()> {
+    let old_req = __kernel_old_timespec {
+        tv_sec: req.tv_sec.try_into().map_err(|_| io::Errno::INVAL)?,
+        tv_nsec: req.tv_nsec.try_into().map_err(|_| io::Errno::INVAL)?,
+    };
+    let mut old_rem = MaybeUninit::<__kernel_old_timespec>::uninit();
+    ret(syscall!(__NR_nanosleep, by_ref(&old_req), &mut old_rem))?;
+    let old_rem = old_rem.assume_init();
+    rem.write(__kernel_timespec {
+        tv_sec: old_rem.tv_sec.into(),
+        tv_nsec: old_rem.tv_nsec.into(),
+    });
+    Ok(())
+}
+
+#[inline]
+pub(crate) fn gettid() -> Pid {
+    unsafe {
+        let tid = ret_c_int_infallible(syscall_readonly!(__NR_gettid));
+        Pid::from_raw_unchecked(tid)
+    }
+}
+
+// TODO: This could be de-multiplexed.
+#[inline]
+pub(crate) unsafe fn futex(
+    uaddr: *mut u32,
+    op: FutexOperation,
+    flags: FutexFlags,
+    val: u32,
+    utime: *const Timespec,
+    uaddr2: *mut u32,
+    val3: u32,
+) -> io::Result<usize> {
+    #[cfg(target_pointer_width = "32")]
+    {
+        ret_usize(syscall!(
+            __NR_futex_time64,
+            uaddr,
+            (op, flags),
+            c_uint(val),
+            utime,
+            uaddr2,
+            c_uint(val3)
+        ))
+        .or_else(|err| {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            if err == io::Errno::NOSYS {
+                futex_old(uaddr, op, flags, val, utime, uaddr2, val3)
+            } else {
+                Err(err)
+            }
+        })
+    }
+    #[cfg(target_pointer_width = "64")]
+    ret_usize(syscall!(
+        __NR_futex,
+        uaddr,
+        (op, flags),
+        c_uint(val),
+        utime,
+        uaddr2,
+        c_uint(val3)
+    ))
+}
+
+#[cfg(target_pointer_width = "32")]
+unsafe fn futex_old(
+    uaddr: *mut u32,
+    op: FutexOperation,
+    flags: FutexFlags,
+    val: u32,
+    utime: *const Timespec,
+    uaddr2: *mut u32,
+    val3: u32,
+) -> io::Result<usize> {
+    let old_utime = __kernel_old_timespec {
+        tv_sec: (*utime).tv_sec.try_into().map_err(|_| io::Errno::INVAL)?,
+        tv_nsec: (*utime).tv_nsec.try_into().map_err(|_| io::Errno::INVAL)?,
+    };
+    ret_usize(syscall!(
+        __NR_futex,
+        uaddr,
+        (op, flags),
+        c_uint(val),
+        by_ref(&old_utime),
+        uaddr2,
+        c_uint(val3)
+    ))
+}
+
+#[inline]
+pub(crate) fn setns(fd: BorrowedFd<'_>, nstype: c::c_int) -> io::Result<c::c_int> {
+    unsafe { ret_c_int(syscall_readonly!(__NR_setns, fd, c_int(nstype))) }
+}
+
+#[inline]
+pub(crate) fn unshare(flags: crate::thread::UnshareFlags) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_unshare, flags)) }
+}
+
+#[inline]
+pub(crate) fn capget(
+    header: &mut linux_raw_sys::general::__user_cap_header_struct,
+    data: &mut [MaybeUninit<linux_raw_sys::general::__user_cap_data_struct>],
+) -> io::Result<()> {
+    unsafe {
+        ret(syscall!(
+            __NR_capget,
+            by_mut(header),
+            slice_just_addr_mut(data)
+        ))
+    }
+}
+
+#[inline]
+pub(crate) fn capset(
+    header: &mut linux_raw_sys::general::__user_cap_header_struct,
+    data: &[linux_raw_sys::general::__user_cap_data_struct],
+) -> io::Result<()> {
+    unsafe { ret(syscall!(__NR_capset, by_mut(header), slice_just_addr(data))) }
+}
+
+#[inline]
+pub(crate) fn setuid_thread(uid: crate::ugid::Uid) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_setuid, uid)) }
+}
+
+#[inline]
+pub(crate) fn setresuid_thread(
+    ruid: crate::ugid::Uid,
+    euid: crate::ugid::Uid,
+    suid: crate::ugid::Uid,
+) -> io::Result<()> {
+    #[cfg(any(target_arch = "x86", target_arch = "arm", target_arch = "sparc"))]
+    unsafe {
+        ret(syscall_readonly!(__NR_setresuid32, ruid, euid, suid))
+    }
+    #[cfg(not(any(target_arch = "x86", target_arch = "arm", target_arch = "sparc")))]
+    unsafe {
+        ret(syscall_readonly!(__NR_setresuid, ruid, euid, suid))
+    }
+}
+
+#[inline]
+pub(crate) fn setgid_thread(gid: crate::ugid::Gid) -> io::Result<()> {
+    unsafe { ret(syscall_readonly!(__NR_setgid, gid)) }
+}
+
+#[inline]
+pub(crate) fn setresgid_thread(
+    rgid: crate::ugid::Gid,
+    egid: crate::ugid::Gid,
+    sgid: crate::ugid::Gid,
+) -> io::Result<()> {
+    #[cfg(any(target_arch = "x86", target_arch = "arm", target_arch = "sparc"))]
+    unsafe {
+        ret(syscall_readonly!(__NR_setresgid32, rgid, egid, sgid))
+    }
+    #[cfg(not(any(target_arch = "x86", target_arch = "arm", target_arch = "sparc")))]
+    unsafe {
+        ret(syscall_readonly!(__NR_setresgid, rgid, egid, sgid))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/time/mod.rs b/vendor/rustix/src/backend/linux_raw/time/mod.rs
new file mode 100644
index 0000000..c42592c
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/time/mod.rs
@@ -0,0 +1,3 @@
+#[cfg(any(feature = "time", target_arch = "x86"))]
+pub(crate) mod syscalls;
+pub(crate) mod types;
diff --git a/vendor/rustix/src/backend/linux_raw/time/syscalls.rs b/vendor/rustix/src/backend/linux_raw/time/syscalls.rs
new file mode 100644
index 0000000..d20bcfa
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/time/syscalls.rs
@@ -0,0 +1,257 @@
+//! linux_raw syscalls supporting `rustix::time`.
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::conv::{ret, ret_infallible};
+use crate::clockid::ClockId;
+use crate::io;
+use crate::timespec::Timespec;
+use core::mem::MaybeUninit;
+#[cfg(all(feature = "time", target_pointer_width = "32"))]
+use linux_raw_sys::general::itimerspec as __kernel_old_itimerspec;
+#[cfg(target_pointer_width = "32")]
+use linux_raw_sys::general::timespec as __kernel_old_timespec;
+#[cfg(feature = "time")]
+use {
+    crate::backend::conv::{by_ref, ret_owned_fd},
+    crate::fd::BorrowedFd,
+    crate::fd::OwnedFd,
+    crate::time::{Itimerspec, TimerfdClockId, TimerfdFlags, TimerfdTimerFlags},
+};
+
+// `clock_gettime` has special optimizations via the vDSO.
+#[cfg(feature = "time")]
+pub(crate) use crate::backend::vdso_wrappers::{clock_gettime, clock_gettime_dynamic};
+
+#[inline]
+pub(crate) fn clock_getres(which_clock: ClockId) -> Timespec {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        let mut result = MaybeUninit::<Timespec>::uninit();
+        if let Err(err) = ret(syscall!(__NR_clock_getres_time64, which_clock, &mut result)) {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            debug_assert_eq!(err, io::Errno::NOSYS);
+            clock_getres_old(which_clock, &mut result);
+        }
+        result.assume_init()
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        let mut result = MaybeUninit::<Timespec>::uninit();
+        ret_infallible(syscall!(__NR_clock_getres, which_clock, &mut result));
+        result.assume_init()
+    }
+}
+
+#[cfg(target_pointer_width = "32")]
+unsafe fn clock_getres_old(which_clock: ClockId, result: &mut MaybeUninit<Timespec>) {
+    let mut old_result = MaybeUninit::<__kernel_old_timespec>::uninit();
+    ret_infallible(syscall!(__NR_clock_getres, which_clock, &mut old_result));
+    let old_result = old_result.assume_init();
+    result.write(Timespec {
+        tv_sec: old_result.tv_sec.into(),
+        tv_nsec: old_result.tv_nsec.into(),
+    });
+}
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn clock_settime(which_clock: ClockId, timespec: Timespec) -> io::Result<()> {
+    // `clock_settime64` was introduced in Linux 5.1. The old `clock_settime`
+    // syscall is not y2038-compatible on 32-bit architectures.
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        match ret(syscall_readonly!(
+            __NR_clock_settime64,
+            which_clock,
+            by_ref(&timespec)
+        )) {
+            Err(io::Errno::NOSYS) => clock_settime_old(which_clock, timespec),
+            otherwise => otherwise,
+        }
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall_readonly!(
+            __NR_clock_settime,
+            which_clock,
+            by_ref(&timespec)
+        ))
+    }
+}
+
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "32")]
+unsafe fn clock_settime_old(which_clock: ClockId, timespec: Timespec) -> io::Result<()> {
+    let old_timespec = __kernel_old_timespec {
+        tv_sec: timespec
+            .tv_sec
+            .try_into()
+            .map_err(|_| io::Errno::OVERFLOW)?,
+        tv_nsec: timespec.tv_nsec as _,
+    };
+    ret(syscall_readonly!(
+        __NR_clock_settime,
+        which_clock,
+        by_ref(&old_timespec)
+    ))
+}
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn timerfd_create(clockid: TimerfdClockId, flags: TimerfdFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall_readonly!(__NR_timerfd_create, clockid, flags)) }
+}
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn timerfd_settime(
+    fd: BorrowedFd<'_>,
+    flags: TimerfdTimerFlags,
+    new_value: &Itimerspec,
+) -> io::Result<Itimerspec> {
+    let mut result = MaybeUninit::<Itimerspec>::uninit();
+
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall!(
+            __NR_timerfd_settime,
+            fd,
+            flags,
+            by_ref(new_value),
+            &mut result
+        ))?;
+        Ok(result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall!(
+            __NR_timerfd_settime64,
+            fd,
+            flags,
+            by_ref(new_value),
+            &mut result
+        ))
+        .or_else(|err| {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            if err == io::Errno::NOSYS {
+                timerfd_settime_old(fd, flags, new_value, &mut result)
+            } else {
+                Err(err)
+            }
+        })?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "32")]
+unsafe fn timerfd_settime_old(
+    fd: BorrowedFd<'_>,
+    flags: TimerfdTimerFlags,
+    new_value: &Itimerspec,
+    result: &mut MaybeUninit<Itimerspec>,
+) -> io::Result<()> {
+    let mut old_result = MaybeUninit::<__kernel_old_itimerspec>::uninit();
+
+    // Convert `new_value` to the old `__kernel_old_itimerspec` format.
+    let old_new_value = __kernel_old_itimerspec {
+        it_interval: __kernel_old_timespec {
+            tv_sec: new_value
+                .it_interval
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: new_value
+                .it_interval
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::INVAL)?,
+        },
+        it_value: __kernel_old_timespec {
+            tv_sec: new_value
+                .it_value
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: new_value
+                .it_value
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::INVAL)?,
+        },
+    };
+    ret(syscall!(
+        __NR_timerfd_settime,
+        fd,
+        flags,
+        by_ref(&old_new_value),
+        &mut old_result
+    ))?;
+    let old_result = old_result.assume_init();
+    result.write(Itimerspec {
+        it_interval: Timespec {
+            tv_sec: old_result.it_interval.tv_sec.into(),
+            tv_nsec: old_result.it_interval.tv_nsec.into(),
+        },
+        it_value: Timespec {
+            tv_sec: old_result.it_value.tv_sec.into(),
+            tv_nsec: old_result.it_value.tv_nsec.into(),
+        },
+    });
+    Ok(())
+}
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn timerfd_gettime(fd: BorrowedFd<'_>) -> io::Result<Itimerspec> {
+    let mut result = MaybeUninit::<Itimerspec>::uninit();
+
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall!(__NR_timerfd_gettime, fd, &mut result))?;
+        Ok(result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall!(__NR_timerfd_gettime64, fd, &mut result)).or_else(|err| {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            if err == io::Errno::NOSYS {
+                timerfd_gettime_old(fd, &mut result)
+            } else {
+                Err(err)
+            }
+        })?;
+        Ok(result.assume_init())
+    }
+}
+
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "32")]
+unsafe fn timerfd_gettime_old(
+    fd: BorrowedFd<'_>,
+    result: &mut MaybeUninit<Itimerspec>,
+) -> io::Result<()> {
+    let mut old_result = MaybeUninit::<__kernel_old_itimerspec>::uninit();
+    ret(syscall!(__NR_timerfd_gettime, fd, &mut old_result))?;
+    let old_result = old_result.assume_init();
+    result.write(Itimerspec {
+        it_interval: Timespec {
+            tv_sec: old_result.it_interval.tv_sec.into(),
+            tv_nsec: old_result.it_interval.tv_nsec.into(),
+        },
+        it_value: Timespec {
+            tv_sec: old_result.it_value.tv_sec.into(),
+            tv_nsec: old_result.it_value.tv_nsec.into(),
+        },
+    });
+    Ok(())
+}
diff --git a/vendor/rustix/src/backend/linux_raw/time/types.rs b/vendor/rustix/src/backend/linux_raw/time/types.rs
new file mode 100644
index 0000000..c26812c
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/time/types.rs
@@ -0,0 +1,100 @@
+use crate::backend::c;
+use bitflags::bitflags;
+
+/// `struct itimerspec` for use with [`timerfd_gettime`] and
+/// [`timerfd_settime`].
+///
+/// [`timerfd_gettime`]: crate::time::timerfd_gettime
+/// [`timerfd_settime`]: crate::time::timerfd_settime
+pub type Itimerspec = linux_raw_sys::general::__kernel_itimerspec;
+
+bitflags! {
+    /// `TFD_*` flags for use with [`timerfd_create`].
+    ///
+    /// [`timerfd_create`]: crate::time::timerfd_create
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct TimerfdFlags: c::c_uint {
+        /// `TFD_NONBLOCK`
+        #[doc(alias = "TFD_NONBLOCK")]
+        const NONBLOCK = linux_raw_sys::general::TFD_NONBLOCK;
+
+        /// `TFD_CLOEXEC`
+        #[doc(alias = "TFD_CLOEXEC")]
+        const CLOEXEC = linux_raw_sys::general::TFD_CLOEXEC;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+bitflags! {
+    /// `TFD_TIMER_*` flags for use with [`timerfd_settime`].
+    ///
+    /// [`timerfd_settime`]: crate::time::timerfd_settime
+    #[repr(transparent)]
+    #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
+    pub struct TimerfdTimerFlags: c::c_uint {
+        /// `TFD_TIMER_ABSTIME`
+        #[doc(alias = "TFD_TIMER_ABSTIME")]
+        const ABSTIME = linux_raw_sys::general::TFD_TIMER_ABSTIME;
+
+        /// `TFD_TIMER_CANCEL_ON_SET`
+        #[doc(alias = "TFD_TIMER_CANCEL_ON_SET")]
+        const CANCEL_ON_SET = linux_raw_sys::general::TFD_TIMER_CANCEL_ON_SET;
+
+        /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
+        const _ = !0;
+    }
+}
+
+/// `CLOCK_*` constants for use with [`timerfd_create`].
+///
+/// [`timerfd_create`]: crate::time::timerfd_create
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[repr(u32)]
+#[non_exhaustive]
+pub enum TimerfdClockId {
+    /// `CLOCK_REALTIME`—A clock that tells the “real” time.
+    ///
+    /// This is a clock that tells the amount of time elapsed since the Unix
+    /// epoch, 1970-01-01T00:00:00Z. The clock is externally settable, so it is
+    /// not monotonic. Successive reads may see decreasing times, so it isn't
+    /// reliable for measuring durations.
+    #[doc(alias = "CLOCK_REALTIME")]
+    Realtime = linux_raw_sys::general::CLOCK_REALTIME,
+
+    /// `CLOCK_MONOTONIC`—A clock that tells an abstract time.
+    ///
+    /// Unlike `Realtime`, this clock is not based on a fixed known epoch, so
+    /// individual times aren't meaningful. However, since it isn't settable,
+    /// it is reliable for measuring durations.
+    ///
+    /// This clock does not advance while the system is suspended; see
+    /// `Boottime` for a clock that does.
+    #[doc(alias = "CLOCK_MONOTONIC")]
+    Monotonic = linux_raw_sys::general::CLOCK_MONOTONIC,
+
+    /// `CLOCK_BOOTTIME`—Like `Monotonic`, but advances while suspended.
+    ///
+    /// This clock is similar to `Monotonic`, but does advance while the system
+    /// is suspended.
+    #[doc(alias = "CLOCK_BOOTTIME")]
+    Boottime = linux_raw_sys::general::CLOCK_BOOTTIME,
+
+    /// `CLOCK_REALTIME_ALARM`—Like `Realtime`, but wakes a suspended system.
+    ///
+    /// This clock is like `Realtime`, but can wake up a suspended system.
+    ///
+    /// Use of this clock requires the `CAP_WAKE_ALARM` Linux capability.
+    #[doc(alias = "CLOCK_REALTIME_ALARM")]
+    RealtimeAlarm = linux_raw_sys::general::CLOCK_REALTIME_ALARM,
+
+    /// `CLOCK_BOOTTIME_ALARM`—Like `Boottime`, but wakes a suspended system.
+    ///
+    /// This clock is like `Boottime`, but can wake up a suspended system.
+    ///
+    /// Use of this clock requires the `CAP_WAKE_ALARM` Linux capability.
+    #[doc(alias = "CLOCK_BOOTTIME_ALARM")]
+    BoottimeAlarm = linux_raw_sys::general::CLOCK_BOOTTIME_ALARM,
+}
diff --git a/vendor/rustix/src/backend/linux_raw/ugid/mod.rs b/vendor/rustix/src/backend/linux_raw/ugid/mod.rs
new file mode 100644
index 0000000..ef944f0
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/ugid/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod syscalls;
diff --git a/vendor/rustix/src/backend/linux_raw/ugid/syscalls.rs b/vendor/rustix/src/backend/linux_raw/ugid/syscalls.rs
new file mode 100644
index 0000000..5f1551e
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/ugid/syscalls.rs
@@ -0,0 +1,66 @@
+//! linux_raw syscalls for UIDs and GIDs
+//!
+//! # Safety
+//!
+//! See the `rustix::backend` module documentation for details.
+#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)]
+
+use crate::backend::c;
+use crate::backend::conv::ret_usize_infallible;
+use crate::ugid::{Gid, Uid};
+
+#[inline]
+pub(crate) fn getuid() -> Uid {
+    #[cfg(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86"))]
+    unsafe {
+        let uid = ret_usize_infallible(syscall_readonly!(__NR_getuid32)) as c::uid_t;
+        Uid::from_raw(uid)
+    }
+    #[cfg(not(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86")))]
+    unsafe {
+        let uid = ret_usize_infallible(syscall_readonly!(__NR_getuid)) as c::uid_t;
+        Uid::from_raw(uid)
+    }
+}
+
+#[inline]
+pub(crate) fn geteuid() -> Uid {
+    #[cfg(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86"))]
+    unsafe {
+        let uid = ret_usize_infallible(syscall_readonly!(__NR_geteuid32)) as c::uid_t;
+        Uid::from_raw(uid)
+    }
+    #[cfg(not(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86")))]
+    unsafe {
+        let uid = ret_usize_infallible(syscall_readonly!(__NR_geteuid)) as c::uid_t;
+        Uid::from_raw(uid)
+    }
+}
+
+#[inline]
+pub(crate) fn getgid() -> Gid {
+    #[cfg(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86"))]
+    unsafe {
+        let gid = ret_usize_infallible(syscall_readonly!(__NR_getgid32)) as c::gid_t;
+        Gid::from_raw(gid)
+    }
+    #[cfg(not(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86")))]
+    unsafe {
+        let gid = ret_usize_infallible(syscall_readonly!(__NR_getgid)) as c::gid_t;
+        Gid::from_raw(gid)
+    }
+}
+
+#[inline]
+pub(crate) fn getegid() -> Gid {
+    #[cfg(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86"))]
+    unsafe {
+        let gid = ret_usize_infallible(syscall_readonly!(__NR_getegid32)) as c::gid_t;
+        Gid::from_raw(gid)
+    }
+    #[cfg(not(any(target_arch = "arm", target_arch = "sparc", target_arch = "x86")))]
+    unsafe {
+        let gid = ret_usize_infallible(syscall_readonly!(__NR_getegid)) as c::gid_t;
+        Gid::from_raw(gid)
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/vdso.rs b/vendor/rustix/src/backend/linux_raw/vdso.rs
new file mode 100644
index 0000000..102fa6b
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/vdso.rs
@@ -0,0 +1,313 @@
+//! Parse the Linux vDSO.
+//!
+//! The following code is transliterated from
+//! tools/testing/selftests/vDSO/parse_vdso.c in Linux 5.11, which is licensed
+//! with Creative Commons Zero License, version 1.0,
+//! available at <https://creativecommons.org/publicdomain/zero/1.0/legalcode>
+//!
+//! # Safety
+//!
+//! Parsing the vDSO involves a lot of raw pointer manipulation. This
+//! implementation follows Linux's reference implementation, and adds several
+//! additional safety checks.
+#![allow(unsafe_code)]
+
+use super::c;
+use crate::ffi::CStr;
+use crate::utils::check_raw_pointer;
+use core::ffi::c_void;
+use core::mem::size_of;
+use core::ptr::{null, null_mut};
+use linux_raw_sys::elf::*;
+
+pub(super) struct Vdso {
+    // Load information
+    load_addr: *const Elf_Ehdr,
+    load_end: *const c_void, // the end of the `PT_LOAD` segment
+    pv_offset: usize,        // recorded paddr - recorded vaddr
+
+    // Symbol table
+    symtab: *const Elf_Sym,
+    symstrings: *const u8,
+    bucket: *const u32,
+    chain: *const u32,
+    nbucket: u32,
+    //nchain: u32,
+
+    // Version table
+    versym: *const u16,
+    verdef: *const Elf_Verdef,
+}
+
+// Straight from the ELF specification.
+fn elf_hash(name: &CStr) -> u32 {
+    let mut h: u32 = 0;
+    for b in name.to_bytes() {
+        h = (h << 4).wrapping_add(u32::from(*b));
+        let g = h & 0xf000_0000;
+        if g != 0 {
+            h ^= g >> 24;
+        }
+        h &= !g;
+    }
+    h
+}
+
+/// Create a `Vdso` value by parsing the vDSO at the `sysinfo_ehdr` address.
+fn init_from_sysinfo_ehdr() -> Option<Vdso> {
+    // SAFETY: The auxv initialization code does extensive checks to ensure
+    // that the value we get really is an `AT_SYSINFO_EHDR` value from the
+    // kernel.
+    unsafe {
+        let hdr = super::param::auxv::sysinfo_ehdr();
+
+        // If the platform doesn't provide a `AT_SYSINFO_EHDR`, we can't locate
+        // the vDSO.
+        if hdr.is_null() {
+            return None;
+        }
+
+        let mut vdso = Vdso {
+            load_addr: hdr,
+            load_end: hdr.cast(),
+            pv_offset: 0,
+            symtab: null(),
+            symstrings: null(),
+            bucket: null(),
+            chain: null(),
+            nbucket: 0,
+            //nchain: 0,
+            versym: null(),
+            verdef: null(),
+        };
+
+        let hdr = &*hdr;
+        let pt = check_raw_pointer::<Elf_Phdr>(vdso.base_plus(hdr.e_phoff)? as *mut _)?.as_ptr();
+        let mut dyn_: *const Elf_Dyn = null();
+        let mut num_dyn = 0;
+
+        // We need two things from the segment table: the load offset
+        // and the dynamic table.
+        let mut found_vaddr = false;
+        for i in 0..hdr.e_phnum {
+            let phdr = &*pt.add(i as usize);
+            if phdr.p_flags & PF_W != 0 {
+                // Don't trust any vDSO that claims to be loading writable
+                // segments into memory.
+                return None;
+            }
+            if phdr.p_type == PT_LOAD && !found_vaddr {
+                // The segment should be readable and executable, because it
+                // contains the symbol table and the function bodies.
+                if phdr.p_flags & (PF_R | PF_X) != (PF_R | PF_X) {
+                    return None;
+                }
+                found_vaddr = true;
+                vdso.load_end = vdso.base_plus(phdr.p_offset.checked_add(phdr.p_memsz)?)?;
+                vdso.pv_offset = phdr.p_offset.wrapping_sub(phdr.p_vaddr);
+            } else if phdr.p_type == PT_DYNAMIC {
+                // If `p_offset` is zero, it's more likely that we're looking
+                // at memory that has been zeroed than that the kernel has
+                // somehow aliased the `Ehdr` and the `Elf_Dyn` array.
+                if phdr.p_offset < size_of::<Elf_Ehdr>() {
+                    return None;
+                }
+
+                dyn_ = check_raw_pointer::<Elf_Dyn>(vdso.base_plus(phdr.p_offset)? as *mut _)?
+                    .as_ptr();
+                num_dyn = phdr.p_memsz / size_of::<Elf_Dyn>();
+            } else if phdr.p_type == PT_INTERP || phdr.p_type == PT_GNU_RELRO {
+                // Don't trust any ELF image that has an “interpreter” or
+                // that uses RELRO, which is likely to be a user ELF image
+                // rather and not the kernel vDSO.
+                return None;
+            }
+        }
+
+        if !found_vaddr || dyn_.is_null() {
+            return None; // Failed
+        }
+
+        // Fish out the useful bits of the dynamic table.
+        let mut hash: *const u32 = null();
+        vdso.symstrings = null();
+        vdso.symtab = null();
+        vdso.versym = null();
+        vdso.verdef = null();
+        let mut i = 0;
+        loop {
+            if i == num_dyn {
+                return None;
+            }
+            let d = &*dyn_.add(i);
+            match d.d_tag {
+                DT_STRTAB => {
+                    vdso.symstrings =
+                        check_raw_pointer::<u8>(vdso.addr_from_elf(d.d_un.d_ptr)? as *mut _)?
+                            .as_ptr();
+                }
+                DT_SYMTAB => {
+                    vdso.symtab =
+                        check_raw_pointer::<Elf_Sym>(vdso.addr_from_elf(d.d_un.d_ptr)? as *mut _)?
+                            .as_ptr();
+                }
+                DT_HASH => {
+                    hash = check_raw_pointer::<u32>(vdso.addr_from_elf(d.d_un.d_ptr)? as *mut _)?
+                        .as_ptr();
+                }
+                DT_VERSYM => {
+                    vdso.versym =
+                        check_raw_pointer::<u16>(vdso.addr_from_elf(d.d_un.d_ptr)? as *mut _)?
+                            .as_ptr();
+                }
+                DT_VERDEF => {
+                    vdso.verdef = check_raw_pointer::<Elf_Verdef>(
+                        vdso.addr_from_elf(d.d_un.d_ptr)? as *mut _,
+                    )?
+                    .as_ptr();
+                }
+                DT_SYMENT => {
+                    if d.d_un.d_ptr != size_of::<Elf_Sym>() {
+                        return None; // Failed
+                    }
+                }
+                DT_NULL => break,
+                _ => {}
+            }
+            i = i.checked_add(1)?;
+        }
+        // The upstream code checks `symstrings`, `symtab`, and `hash` for
+        // null; here, `check_raw_pointer` has already done that.
+
+        if vdso.verdef.is_null() {
+            vdso.versym = null();
+        }
+
+        // Parse the hash table header.
+        vdso.nbucket = *hash.add(0);
+        //vdso.nchain = *hash.add(1);
+        vdso.bucket = hash.add(2);
+        vdso.chain = hash.add(vdso.nbucket as usize + 2);
+
+        // That's all we need.
+        Some(vdso)
+    }
+}
+
+impl Vdso {
+    /// Parse the vDSO.
+    ///
+    /// Returns `None` if the vDSO can't be located or if it doesn't conform to
+    /// our expectations.
+    #[inline]
+    pub(super) fn new() -> Option<Self> {
+        init_from_sysinfo_ehdr()
+    }
+
+    /// Check the version for a symbol.
+    ///
+    /// # Safety
+    ///
+    /// The raw pointers inside `self` must be valid.
+    unsafe fn match_version(&self, mut ver: u16, name: &CStr, hash: u32) -> bool {
+        // This is a helper function to check if the version indexed by
+        // ver matches name (which hashes to hash).
+        //
+        // The version definition table is a mess, and I don't know how
+        // to do this in better than linear time without allocating memory
+        // to build an index. I also don't know why the table has
+        // variable size entries in the first place.
+        //
+        // For added fun, I can't find a comprehensible specification of how
+        // to parse all the weird flags in the table.
+        //
+        // So I just parse the whole table every time.
+
+        // First step: find the version definition
+        ver &= 0x7fff; // Apparently bit 15 means "hidden"
+        let mut def = self.verdef;
+        loop {
+            if (*def).vd_version != VER_DEF_CURRENT {
+                return false; // Failed
+            }
+
+            if ((*def).vd_flags & VER_FLG_BASE) == 0 && ((*def).vd_ndx & 0x7fff) == ver {
+                break;
+            }
+
+            if (*def).vd_next == 0 {
+                return false; // No definition.
+            }
+
+            def = def
+                .cast::<u8>()
+                .add((*def).vd_next as usize)
+                .cast::<Elf_Verdef>();
+        }
+
+        // Now figure out whether it matches.
+        let aux = &*(def.cast::<u8>())
+            .add((*def).vd_aux as usize)
+            .cast::<Elf_Verdaux>();
+        (*def).vd_hash == hash
+            && (name == CStr::from_ptr(self.symstrings.add(aux.vda_name as usize).cast()))
+    }
+
+    /// Look up a symbol in the vDSO.
+    pub(super) fn sym(&self, version: &CStr, name: &CStr) -> *mut c::c_void {
+        let ver_hash = elf_hash(version);
+        let name_hash = elf_hash(name);
+
+        // SAFETY: The pointers in `self` must be valid.
+        unsafe {
+            let mut chain = *self.bucket.add((name_hash % self.nbucket) as usize);
+
+            while chain != STN_UNDEF {
+                let sym = &*self.symtab.add(chain as usize);
+
+                // Check for a defined global or weak function w/ right name.
+                //
+                // The reference parser in Linux's parse_vdso.c requires
+                // symbols to have type `STT_FUNC`, but on powerpc64, the vDSO
+                // uses `STT_NOTYPE`, so allow that too.
+                if (ELF_ST_TYPE(sym.st_info) != STT_FUNC &&
+                        ELF_ST_TYPE(sym.st_info) != STT_NOTYPE)
+                    || (ELF_ST_BIND(sym.st_info) != STB_GLOBAL
+                        && ELF_ST_BIND(sym.st_info) != STB_WEAK)
+                    || sym.st_shndx == SHN_UNDEF
+                    || sym.st_shndx == SHN_ABS
+                    || ELF_ST_VISIBILITY(sym.st_other) != STV_DEFAULT
+                    || (name != CStr::from_ptr(self.symstrings.add(sym.st_name as usize).cast()))
+                    // Check symbol version.
+                    || (!self.versym.is_null()
+                        && !self.match_version(*self.versym.add(chain as usize), version, ver_hash))
+                {
+                    chain = *self.chain.add(chain as usize);
+                    continue;
+                }
+
+                let sum = self.addr_from_elf(sym.st_value).unwrap();
+                assert!(
+                    sum as usize >= self.load_addr as usize
+                        && sum as usize <= self.load_end as usize
+                );
+                return sum as *mut c::c_void;
+            }
+        }
+
+        null_mut()
+    }
+
+    /// Add the given address to the vDSO base address.
+    unsafe fn base_plus(&self, offset: usize) -> Option<*const c_void> {
+        // Check for overflow.
+        let _ = (self.load_addr as usize).checked_add(offset)?;
+        // Add the offset to the base.
+        Some(self.load_addr.cast::<u8>().add(offset).cast())
+    }
+
+    /// Translate an ELF-address-space address into a usable virtual address.
+    unsafe fn addr_from_elf(&self, elf_addr: usize) -> Option<*const c_void> {
+        self.base_plus(elf_addr.wrapping_add(self.pv_offset))
+    }
+}
diff --git a/vendor/rustix/src/backend/linux_raw/vdso_wrappers.rs b/vendor/rustix/src/backend/linux_raw/vdso_wrappers.rs
new file mode 100644
index 0000000..441738f
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/vdso_wrappers.rs
@@ -0,0 +1,608 @@
+//! Implement syscalls using the vDSO.
+//!
+//! <https://man7.org/linux/man-pages/man7/vdso.7.html>
+//!
+//! # Safety
+//!
+//! Similar to syscalls.rs, this file performs raw system calls, and sometimes
+//! passes them uninitialized memory buffers. This file also calls vDSO
+//! functions.
+#![allow(unsafe_code)]
+
+#[cfg(target_arch = "x86")]
+use super::reg::{ArgReg, RetReg, SyscallNumber, A0, A1, A2, A3, A4, A5, R0};
+use super::vdso;
+#[cfg(target_arch = "x86")]
+use core::arch::global_asm;
+#[cfg(feature = "process")]
+#[cfg(any(
+    target_arch = "x86_64",
+    target_arch = "x86",
+    target_arch = "riscv64",
+    target_arch = "powerpc64"
+))]
+use core::ffi::c_void;
+use core::mem::transmute;
+use core::ptr::null_mut;
+use core::sync::atomic::AtomicPtr;
+use core::sync::atomic::Ordering::Relaxed;
+#[cfg(target_pointer_width = "32")]
+#[cfg(feature = "time")]
+use linux_raw_sys::general::timespec as __kernel_old_timespec;
+#[cfg(any(
+    all(
+        feature = "process",
+        any(
+            target_arch = "x86_64",
+            target_arch = "x86",
+            target_arch = "riscv64",
+            target_arch = "powerpc64"
+        )
+    ),
+    feature = "time"
+))]
+use {super::c, super::conv::ret, core::mem::MaybeUninit};
+#[cfg(feature = "time")]
+use {
+    super::conv::c_int,
+    crate::clockid::{ClockId, DynamicClockId},
+    crate::io,
+    crate::timespec::Timespec,
+    linux_raw_sys::general::{__kernel_clockid_t, __kernel_timespec},
+};
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn clock_gettime(which_clock: ClockId) -> __kernel_timespec {
+    // SAFETY: `CLOCK_GETTIME` contains either null or the address of a
+    // function with an ABI like libc `clock_gettime`, and calling it has the
+    // side effect of writing to the result buffer, and no others.
+    unsafe {
+        let mut result = MaybeUninit::<__kernel_timespec>::uninit();
+        let callee = match transmute(CLOCK_GETTIME.load(Relaxed)) {
+            Some(callee) => callee,
+            None => init_clock_gettime(),
+        };
+        let r0 = callee(which_clock as c::c_int, result.as_mut_ptr());
+        // The `ClockId` enum only contains clocks which never fail. It may be
+        // tempting to change this to `debug_assert_eq`, however they can still
+        // fail on uncommon kernel configs, so we leave this in place to ensure
+        // that we don't execute undefined behavior if they ever do fail.
+        assert_eq!(r0, 0);
+        result.assume_init()
+    }
+}
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn clock_gettime_dynamic(which_clock: DynamicClockId<'_>) -> io::Result<Timespec> {
+    let id = match which_clock {
+        DynamicClockId::Known(id) => id as __kernel_clockid_t,
+
+        DynamicClockId::Dynamic(fd) => {
+            // See `FD_TO_CLOCKID` in Linux's `clock_gettime` documentation.
+            use crate::backend::fd::AsRawFd;
+            const CLOCKFD: i32 = 3;
+            ((!fd.as_raw_fd() << 3) | CLOCKFD) as __kernel_clockid_t
+        }
+
+        DynamicClockId::RealtimeAlarm => c::CLOCK_REALTIME_ALARM as __kernel_clockid_t,
+        DynamicClockId::Tai => c::CLOCK_TAI as __kernel_clockid_t,
+        DynamicClockId::Boottime => c::CLOCK_BOOTTIME as __kernel_clockid_t,
+        DynamicClockId::BoottimeAlarm => c::CLOCK_BOOTTIME_ALARM as __kernel_clockid_t,
+    };
+
+    // SAFETY: `CLOCK_GETTIME` contains either null or the address of a
+    // function with an ABI like libc `clock_gettime`, and calling it has the
+    // side effect of writing to the result buffer, and no others.
+    unsafe {
+        const EINVAL: c::c_int = -(c::EINVAL as c::c_int);
+        let mut timespec = MaybeUninit::<Timespec>::uninit();
+        let callee = match transmute(CLOCK_GETTIME.load(Relaxed)) {
+            Some(callee) => callee,
+            None => init_clock_gettime(),
+        };
+        match callee(id, timespec.as_mut_ptr()) {
+            0 => (),
+            EINVAL => return Err(io::Errno::INVAL),
+            _ => _rustix_clock_gettime_via_syscall(id, timespec.as_mut_ptr())?,
+        }
+        Ok(timespec.assume_init())
+    }
+}
+
+#[cfg(feature = "process")]
+#[cfg(any(
+    target_arch = "x86_64",
+    target_arch = "x86",
+    target_arch = "riscv64",
+    target_arch = "powerpc64"
+))]
+#[inline]
+pub(crate) fn sched_getcpu() -> usize {
+    // SAFETY: `GETCPU` contains either null or the address of a function with
+    // an ABI like libc `getcpu`, and calling it has the side effect of writing
+    // to the result buffers, and no others.
+    unsafe {
+        let mut cpu = MaybeUninit::<u32>::uninit();
+        let callee = match transmute(GETCPU.load(Relaxed)) {
+            Some(callee) => callee,
+            None => init_getcpu(),
+        };
+        let r0 = callee(cpu.as_mut_ptr(), null_mut(), null_mut());
+        debug_assert_eq!(r0, 0);
+        cpu.assume_init() as usize
+    }
+}
+
+#[cfg(target_arch = "x86")]
+pub(super) mod x86_via_vdso {
+    use super::{transmute, ArgReg, Relaxed, RetReg, SyscallNumber, A0, A1, A2, A3, A4, A5, R0};
+    use crate::backend::arch::asm;
+
+    #[inline]
+    pub(in crate::backend) unsafe fn syscall0(nr: SyscallNumber<'_>) -> RetReg<R0> {
+        let callee = match transmute(super::SYSCALL.load(Relaxed)) {
+            Some(callee) => callee,
+            None => super::init_syscall(),
+        };
+        asm::indirect_syscall0(callee, nr)
+    }
+
+    #[inline]
+    pub(in crate::backend) unsafe fn syscall1<'a>(
+        nr: SyscallNumber<'a>,
+        a0: ArgReg<'a, A0>,
+    ) -> RetReg<R0> {
+        let callee = match transmute(super::SYSCALL.load(Relaxed)) {
+            Some(callee) => callee,
+            None => super::init_syscall(),
+        };
+        asm::indirect_syscall1(callee, nr, a0)
+    }
+
+    #[inline]
+    pub(in crate::backend) unsafe fn syscall1_noreturn<'a>(
+        nr: SyscallNumber<'a>,
+        a0: ArgReg<'a, A0>,
+    ) -> ! {
+        let callee = match transmute(super::SYSCALL.load(Relaxed)) {
+            Some(callee) => callee,
+            None => super::init_syscall(),
+        };
+        asm::indirect_syscall1_noreturn(callee, nr, a0)
+    }
+
+    #[inline]
+    pub(in crate::backend) unsafe fn syscall2<'a>(
+        nr: SyscallNumber<'a>,
+        a0: ArgReg<'a, A0>,
+        a1: ArgReg<'a, A1>,
+    ) -> RetReg<R0> {
+        let callee = match transmute(super::SYSCALL.load(Relaxed)) {
+            Some(callee) => callee,
+            None => super::init_syscall(),
+        };
+        asm::indirect_syscall2(callee, nr, a0, a1)
+    }
+
+    #[inline]
+    pub(in crate::backend) unsafe fn syscall3<'a>(
+        nr: SyscallNumber<'a>,
+        a0: ArgReg<'a, A0>,
+        a1: ArgReg<'a, A1>,
+        a2: ArgReg<'a, A2>,
+    ) -> RetReg<R0> {
+        let callee = match transmute(super::SYSCALL.load(Relaxed)) {
+            Some(callee) => callee,
+            None => super::init_syscall(),
+        };
+        asm::indirect_syscall3(callee, nr, a0, a1, a2)
+    }
+
+    #[inline]
+    pub(in crate::backend) unsafe fn syscall4<'a>(
+        nr: SyscallNumber<'a>,
+        a0: ArgReg<'a, A0>,
+        a1: ArgReg<'a, A1>,
+        a2: ArgReg<'a, A2>,
+        a3: ArgReg<'a, A3>,
+    ) -> RetReg<R0> {
+        let callee = match transmute(super::SYSCALL.load(Relaxed)) {
+            Some(callee) => callee,
+            None => super::init_syscall(),
+        };
+        asm::indirect_syscall4(callee, nr, a0, a1, a2, a3)
+    }
+
+    #[inline]
+    pub(in crate::backend) unsafe fn syscall5<'a>(
+        nr: SyscallNumber<'a>,
+        a0: ArgReg<'a, A0>,
+        a1: ArgReg<'a, A1>,
+        a2: ArgReg<'a, A2>,
+        a3: ArgReg<'a, A3>,
+        a4: ArgReg<'a, A4>,
+    ) -> RetReg<R0> {
+        let callee = match transmute(super::SYSCALL.load(Relaxed)) {
+            Some(callee) => callee,
+            None => super::init_syscall(),
+        };
+        asm::indirect_syscall5(callee, nr, a0, a1, a2, a3, a4)
+    }
+
+    #[inline]
+    pub(in crate::backend) unsafe fn syscall6<'a>(
+        nr: SyscallNumber<'a>,
+        a0: ArgReg<'a, A0>,
+        a1: ArgReg<'a, A1>,
+        a2: ArgReg<'a, A2>,
+        a3: ArgReg<'a, A3>,
+        a4: ArgReg<'a, A4>,
+        a5: ArgReg<'a, A5>,
+    ) -> RetReg<R0> {
+        let callee = match transmute(super::SYSCALL.load(Relaxed)) {
+            Some(callee) => callee,
+            None => super::init_syscall(),
+        };
+        asm::indirect_syscall6(callee, nr, a0, a1, a2, a3, a4, a5)
+    }
+
+    // With the indirect call, it isn't meaningful to do a separate
+    // `_readonly` optimization.
+    #[allow(unused_imports)]
+    pub(in crate::backend) use {
+        syscall0 as syscall0_readonly, syscall1 as syscall1_readonly,
+        syscall2 as syscall2_readonly, syscall3 as syscall3_readonly,
+        syscall4 as syscall4_readonly, syscall5 as syscall5_readonly,
+        syscall6 as syscall6_readonly,
+    };
+}
+
+#[cfg(feature = "time")]
+type ClockGettimeType = unsafe extern "C" fn(c::c_int, *mut Timespec) -> c::c_int;
+
+#[cfg(feature = "process")]
+#[cfg(any(
+    target_arch = "x86_64",
+    target_arch = "x86",
+    target_arch = "riscv64",
+    target_arch = "powerpc64"
+))]
+type GetcpuType = unsafe extern "C" fn(*mut u32, *mut u32, *mut c_void) -> c::c_int;
+
+/// The underlying syscall functions are only called from asm, using the
+/// special syscall calling convention to pass arguments and return values,
+/// which the signature here doesn't reflect.
+#[cfg(target_arch = "x86")]
+pub(super) type SyscallType = unsafe extern "C" fn();
+
+/// Initialize `CLOCK_GETTIME` and return its value.
+#[cfg(feature = "time")]
+#[cold]
+fn init_clock_gettime() -> ClockGettimeType {
+    init();
+    // SAFETY: Load the function address from static storage that we just
+    // initialized.
+    unsafe { transmute(CLOCK_GETTIME.load(Relaxed)) }
+}
+
+/// Initialize `GETCPU` and return its value.
+#[cfg(feature = "process")]
+#[cfg(any(
+    target_arch = "x86_64",
+    target_arch = "x86",
+    target_arch = "riscv64",
+    target_arch = "powerpc64"
+))]
+#[cold]
+fn init_getcpu() -> GetcpuType {
+    init();
+    // SAFETY: Load the function address from static storage that we just
+    // initialized.
+    unsafe { transmute(GETCPU.load(Relaxed)) }
+}
+
+/// Initialize `SYSCALL` and return its value.
+#[cfg(target_arch = "x86")]
+#[cold]
+fn init_syscall() -> SyscallType {
+    init();
+    // SAFETY: Load the function address from static storage that we just
+    // initialized.
+    unsafe { transmute(SYSCALL.load(Relaxed)) }
+}
+
+/// `AtomicPtr` can't hold a `fn` pointer, so we use a `*` pointer to this
+/// placeholder type, and cast it as needed.
+struct Function;
+#[cfg(feature = "time")]
+static mut CLOCK_GETTIME: AtomicPtr<Function> = AtomicPtr::new(null_mut());
+#[cfg(feature = "process")]
+#[cfg(any(
+    target_arch = "x86_64",
+    target_arch = "x86",
+    target_arch = "riscv64",
+    target_arch = "powerpc64"
+))]
+static mut GETCPU: AtomicPtr<Function> = AtomicPtr::new(null_mut());
+#[cfg(target_arch = "x86")]
+static mut SYSCALL: AtomicPtr<Function> = AtomicPtr::new(null_mut());
+
+#[cfg(feature = "time")]
+unsafe extern "C" fn rustix_clock_gettime_via_syscall(
+    clockid: c::c_int,
+    res: *mut Timespec,
+) -> c::c_int {
+    match _rustix_clock_gettime_via_syscall(clockid, res) {
+        Ok(()) => 0,
+        Err(err) => err.raw_os_error().wrapping_neg(),
+    }
+}
+
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "32")]
+unsafe fn _rustix_clock_gettime_via_syscall(
+    clockid: c::c_int,
+    res: *mut Timespec,
+) -> io::Result<()> {
+    let r0 = syscall!(__NR_clock_gettime64, c_int(clockid), res);
+    match ret(r0) {
+        Err(io::Errno::NOSYS) => _rustix_clock_gettime_via_syscall_old(clockid, res),
+        otherwise => otherwise,
+    }
+}
+
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "32")]
+unsafe fn _rustix_clock_gettime_via_syscall_old(
+    clockid: c::c_int,
+    res: *mut Timespec,
+) -> io::Result<()> {
+    // Ordinarily `rustix` doesn't like to emulate system calls, but in the
+    // case of time APIs, it's specific to Linux, specific to 32-bit
+    // architectures *and* specific to old kernel versions, and it's not that
+    // hard to fix up here, so that no other code needs to worry about this.
+    let mut old_result = MaybeUninit::<__kernel_old_timespec>::uninit();
+    let r0 = syscall!(__NR_clock_gettime, c_int(clockid), &mut old_result);
+    match ret(r0) {
+        Ok(()) => {
+            let old_result = old_result.assume_init();
+            *res = Timespec {
+                tv_sec: old_result.tv_sec.into(),
+                tv_nsec: old_result.tv_nsec.into(),
+            };
+            Ok(())
+        }
+        otherwise => otherwise,
+    }
+}
+
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "64")]
+unsafe fn _rustix_clock_gettime_via_syscall(
+    clockid: c::c_int,
+    res: *mut Timespec,
+) -> io::Result<()> {
+    ret(syscall!(__NR_clock_gettime, c_int(clockid), res))
+}
+
+#[cfg(feature = "process")]
+#[cfg(any(
+    target_arch = "x86_64",
+    target_arch = "x86",
+    target_arch = "riscv64",
+    target_arch = "powerpc64"
+))]
+unsafe extern "C" fn rustix_getcpu_via_syscall(
+    cpu: *mut u32,
+    node: *mut u32,
+    unused: *mut c_void,
+) -> c::c_int {
+    match ret(syscall!(__NR_getcpu, cpu, node, unused)) {
+        Ok(()) => 0,
+        Err(err) => err.raw_os_error().wrapping_neg(),
+    }
+}
+
+#[cfg(target_arch = "x86")]
+extern "C" {
+    /// A symbol pointing to an `int 0x80` instruction. This “function” is only
+    /// called from assembly, and only with the x86 syscall calling convention,
+    /// so its signature here is not its true signature.
+    ///
+    /// This extern block and the `global_asm!` below can be replaced with
+    /// `#[naked]` if it's stabilized.
+    fn rustix_int_0x80();
+}
+
+#[cfg(target_arch = "x86")]
+global_asm!(
+    r#"
+    .section    .text.rustix_int_0x80,"ax",@progbits
+    .p2align    4
+    .weak       rustix_int_0x80
+    .hidden     rustix_int_0x80
+    .type       rustix_int_0x80, @function
+rustix_int_0x80:
+    .cfi_startproc
+    int    0x80
+    ret
+    .cfi_endproc
+    .size rustix_int_0x80, .-rustix_int_0x80
+"#
+);
+
+fn minimal_init() {
+    // SAFETY: Store default function addresses in static storage so that if we
+    // end up making any system calls while we read the vDSO, they'll work. If
+    // the memory happens to already be initialized, this is redundant, but not
+    // harmful.
+    unsafe {
+        #[cfg(feature = "time")]
+        {
+            CLOCK_GETTIME
+                .compare_exchange(
+                    null_mut(),
+                    rustix_clock_gettime_via_syscall as *mut Function,
+                    Relaxed,
+                    Relaxed,
+                )
+                .ok();
+        }
+
+        #[cfg(feature = "process")]
+        #[cfg(any(
+            target_arch = "x86_64",
+            target_arch = "x86",
+            target_arch = "riscv64",
+            target_arch = "powerpc64"
+        ))]
+        {
+            GETCPU
+                .compare_exchange(
+                    null_mut(),
+                    rustix_getcpu_via_syscall as *mut Function,
+                    Relaxed,
+                    Relaxed,
+                )
+                .ok();
+        }
+
+        #[cfg(target_arch = "x86")]
+        {
+            SYSCALL
+                .compare_exchange(
+                    null_mut(),
+                    rustix_int_0x80 as *mut Function,
+                    Relaxed,
+                    Relaxed,
+                )
+                .ok();
+        }
+    }
+}
+
+fn init() {
+    minimal_init();
+
+    if let Some(vdso) = vdso::Vdso::new() {
+        #[cfg(feature = "time")]
+        {
+            // Look up the platform-specific `clock_gettime` symbol as
+            // documented [here], except on 32-bit platforms where we look up
+            // the `64`-suffixed variant and fail if we don't find it.
+            //
+            // [here]: https://man7.org/linux/man-pages/man7/vdso.7.html
+            #[cfg(target_arch = "x86_64")]
+            let ptr = vdso.sym(cstr!("LINUX_2.6"), cstr!("__vdso_clock_gettime"));
+            #[cfg(target_arch = "arm")]
+            let ptr = vdso.sym(cstr!("LINUX_2.6"), cstr!("__vdso_clock_gettime64"));
+            #[cfg(target_arch = "aarch64")]
+            let ptr = vdso.sym(cstr!("LINUX_2.6.39"), cstr!("__kernel_clock_gettime"));
+            #[cfg(target_arch = "x86")]
+            let ptr = vdso.sym(cstr!("LINUX_2.6"), cstr!("__vdso_clock_gettime64"));
+            #[cfg(target_arch = "riscv64")]
+            let ptr = vdso.sym(cstr!("LINUX_4.15"), cstr!("__vdso_clock_gettime"));
+            #[cfg(target_arch = "powerpc64")]
+            let ptr = vdso.sym(cstr!("LINUX_2.6.15"), cstr!("__kernel_clock_gettime"));
+            #[cfg(any(target_arch = "mips", target_arch = "mips32r6"))]
+            let ptr = vdso.sym(cstr!("LINUX_2.6"), cstr!("__vdso_clock_gettime64"));
+            #[cfg(any(target_arch = "mips64", target_arch = "mips64r6"))]
+            let ptr = vdso.sym(cstr!("LINUX_2.6"), cstr!("__vdso_clock_gettime"));
+
+            // On all 64-bit platforms, the 64-bit `clock_gettime` symbols are
+            // always available.
+            #[cfg(target_pointer_width = "64")]
+            let ok = true;
+
+            // On some 32-bit platforms, the 64-bit `clock_gettime` symbols are
+            // not available on older kernel versions.
+            #[cfg(any(
+                target_arch = "arm",
+                target_arch = "mips",
+                target_arch = "mips32r6",
+                target_arch = "x86"
+            ))]
+            let ok = !ptr.is_null();
+
+            if ok {
+                assert!(!ptr.is_null());
+
+                // SAFETY: Store the computed function addresses in static
+                // storage so that we don't need to compute it again (but if
+                // we do, it doesn't hurt anything).
+                unsafe {
+                    CLOCK_GETTIME.store(ptr.cast(), Relaxed);
+                }
+            }
+        }
+
+        #[cfg(feature = "process")]
+        #[cfg(any(
+            target_arch = "x86_64",
+            target_arch = "x86",
+            target_arch = "riscv64",
+            target_arch = "powerpc64"
+        ))]
+        {
+            // Look up the platform-specific `getcpu` symbol as documented
+            // [here].
+            //
+            // [here]: https://man7.org/linux/man-pages/man7/vdso.7.html
+            #[cfg(target_arch = "x86_64")]
+            let ptr = vdso.sym(cstr!("LINUX_2.6"), cstr!("__vdso_getcpu"));
+            #[cfg(target_arch = "x86")]
+            let ptr = vdso.sym(cstr!("LINUX_2.6"), cstr!("__vdso_getcpu"));
+            #[cfg(target_arch = "riscv64")]
+            let ptr = vdso.sym(cstr!("LINUX_4.15"), cstr!("__kernel_getcpu"));
+            #[cfg(target_arch = "powerpc64")]
+            let ptr = vdso.sym(cstr!("LINUX_2.6.15"), cstr!("__kernel_getcpu"));
+
+            #[cfg(any(
+                target_arch = "x86_64",
+                target_arch = "riscv64",
+                target_arch = "powerpc64"
+            ))]
+            let ok = true;
+
+            // On 32-bit x86, the symbol doesn't appear present sometimes.
+            #[cfg(target_arch = "x86")]
+            let ok = !ptr.is_null();
+
+            #[cfg(any(
+                target_arch = "aarch64",
+                target_arch = "arm",
+                target_arch = "mips",
+                target_arch = "mips32r6",
+                target_arch = "mips64",
+                target_arch = "mips64r6"
+            ))]
+            let ok = false;
+
+            if ok {
+                assert!(!ptr.is_null());
+
+                // SAFETY: Store the computed function addresses in static
+                // storage so that we don't need to compute it again (but if
+                // we do, it doesn't hurt anything).
+                unsafe {
+                    GETCPU.store(ptr.cast(), Relaxed);
+                }
+            }
+        }
+
+        // On x86, also look up the vsyscall entry point.
+        #[cfg(target_arch = "x86")]
+        {
+            let ptr = vdso.sym(cstr!("LINUX_2.5"), cstr!("__kernel_vsyscall"));
+            assert!(!ptr.is_null());
+
+            // SAFETY: As above, store the computed function addresses in
+            // static storage.
+            unsafe {
+                SYSCALL.store(ptr.cast(), Relaxed);
+            }
+        }
+    }
+}