1 files changed, 0 insertions, 315 deletions
diff --git a/vendor/rustix/src/backend/linux_raw/fs/dir.rs b/vendor/rustix/src/backend/linux_raw/fs/dir.rs
deleted file mode 100644
index dbddd58..0000000
--- a/vendor/rustix/src/backend/linux_raw/fs/dir.rs
+++ /dev/null
@@ -1,315 +0,0 @@
-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());
-}