3 files changed, 44 insertions, 0 deletions
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;
+    }
+}