4198d2975d
Commit 77005950f09d2f9ba54962bf5adc3f2bc3a7213f implemented masking of FileType to fix an issue[^1] in the semantic of FileType comparison. This commit introduces masking to Hash to maintain the invariant that x == y => hash(x) == hash(y). [^1]: https://github.com/rust-lang/rust/issues/104900
1946 lines
65 KiB
Rust
1946 lines
65 KiB
Rust
// miri has some special hacks here that make things unused.
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#![cfg_attr(miri, allow(unused))]
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use crate::os::unix::prelude::*;
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use crate::ffi::{CStr, OsStr, OsString};
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use crate::fmt;
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use crate::io::{self, BorrowedCursor, Error, IoSlice, IoSliceMut, SeekFrom};
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use crate::mem;
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#[cfg(any(
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target_os = "android",
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target_os = "linux",
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target_os = "solaris",
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target_os = "fuchsia",
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target_os = "redox",
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target_os = "illumos"
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))]
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use crate::mem::MaybeUninit;
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use crate::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd};
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use crate::path::{Path, PathBuf};
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use crate::ptr;
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use crate::sync::Arc;
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use crate::sys::common::small_c_string::run_path_with_cstr;
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use crate::sys::fd::FileDesc;
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use crate::sys::time::SystemTime;
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use crate::sys::{cvt, cvt_r};
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use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
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#[cfg(any(
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all(target_os = "linux", target_env = "gnu"),
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target_os = "macos",
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target_os = "ios",
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target_os = "watchos",
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))]
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use crate::sys::weak::syscall;
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#[cfg(any(target_os = "android", target_os = "macos"))]
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use crate::sys::weak::weak;
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use libc::{c_int, mode_t};
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#[cfg(any(
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target_os = "macos",
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target_os = "ios",
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target_os = "watchos",
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all(target_os = "linux", target_env = "gnu")
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))]
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use libc::c_char;
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#[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "android"))]
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use libc::dirfd;
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#[cfg(any(target_os = "linux", target_os = "emscripten"))]
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use libc::fstatat64;
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#[cfg(any(
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target_os = "android",
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target_os = "solaris",
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target_os = "fuchsia",
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target_os = "redox",
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target_os = "illumos"
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))]
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use libc::readdir as readdir64;
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#[cfg(target_os = "linux")]
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use libc::readdir64;
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#[cfg(any(target_os = "emscripten", target_os = "l4re"))]
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use libc::readdir64_r;
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#[cfg(not(any(
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target_os = "android",
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target_os = "linux",
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target_os = "emscripten",
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target_os = "solaris",
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target_os = "illumos",
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target_os = "l4re",
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target_os = "fuchsia",
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target_os = "redox"
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)))]
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use libc::readdir_r as readdir64_r;
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#[cfg(target_os = "android")]
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use libc::{
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dirent as dirent64, fstat as fstat64, fstatat as fstatat64, ftruncate64, lseek64,
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lstat as lstat64, off64_t, open as open64, stat as stat64,
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};
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#[cfg(not(any(
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target_os = "linux",
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target_os = "emscripten",
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target_os = "l4re",
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target_os = "android"
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)))]
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use libc::{
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dirent as dirent64, fstat as fstat64, ftruncate as ftruncate64, lseek as lseek64,
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lstat as lstat64, off_t as off64_t, open as open64, stat as stat64,
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};
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#[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "l4re"))]
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use libc::{dirent64, fstat64, ftruncate64, lseek64, lstat64, off64_t, open64, stat64};
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pub use crate::sys_common::fs::try_exists;
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pub struct File(FileDesc);
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// FIXME: This should be available on Linux with all `target_env`.
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// But currently only glibc exposes `statx` fn and structs.
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// We don't want to import unverified raw C structs here directly.
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// https://github.com/rust-lang/rust/pull/67774
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macro_rules! cfg_has_statx {
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({ $($then_tt:tt)* } else { $($else_tt:tt)* }) => {
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cfg_if::cfg_if! {
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if #[cfg(all(target_os = "linux", target_env = "gnu"))] {
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$($then_tt)*
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} else {
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$($else_tt)*
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}
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}
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};
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($($block_inner:tt)*) => {
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#[cfg(all(target_os = "linux", target_env = "gnu"))]
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{
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$($block_inner)*
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}
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};
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}
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cfg_has_statx! {{
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#[derive(Clone)]
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pub struct FileAttr {
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stat: stat64,
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statx_extra_fields: Option<StatxExtraFields>,
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}
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#[derive(Clone)]
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struct StatxExtraFields {
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// This is needed to check if btime is supported by the filesystem.
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stx_mask: u32,
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stx_btime: libc::statx_timestamp,
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// With statx, we can overcome 32-bit `time_t` too.
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#[cfg(target_pointer_width = "32")]
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stx_atime: libc::statx_timestamp,
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#[cfg(target_pointer_width = "32")]
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stx_ctime: libc::statx_timestamp,
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#[cfg(target_pointer_width = "32")]
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stx_mtime: libc::statx_timestamp,
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}
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// We prefer `statx` on Linux if available, which contains file creation time,
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// as well as 64-bit timestamps of all kinds.
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// Default `stat64` contains no creation time and may have 32-bit `time_t`.
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unsafe fn try_statx(
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fd: c_int,
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path: *const c_char,
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flags: i32,
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mask: u32,
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) -> Option<io::Result<FileAttr>> {
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use crate::sync::atomic::{AtomicU8, Ordering};
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// Linux kernel prior to 4.11 or glibc prior to glibc 2.28 don't support `statx`
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// We store the availability in global to avoid unnecessary syscalls.
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// 0: Unknown
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// 1: Not available
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// 2: Available
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static STATX_STATE: AtomicU8 = AtomicU8::new(0);
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syscall! {
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fn statx(
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fd: c_int,
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pathname: *const c_char,
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flags: c_int,
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mask: libc::c_uint,
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statxbuf: *mut libc::statx
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) -> c_int
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}
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match STATX_STATE.load(Ordering::Relaxed) {
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0 => {
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// It is a trick to call `statx` with null pointers to check if the syscall
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// is available. According to the manual, it is expected to fail with EFAULT.
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// We do this mainly for performance, since it is nearly hundreds times
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// faster than a normal successful call.
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let err = cvt(statx(0, ptr::null(), 0, libc::STATX_ALL, ptr::null_mut()))
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.err()
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.and_then(|e| e.raw_os_error());
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// We don't check `err == Some(libc::ENOSYS)` because the syscall may be limited
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// and returns `EPERM`. Listing all possible errors seems not a good idea.
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// See: https://github.com/rust-lang/rust/issues/65662
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if err != Some(libc::EFAULT) {
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STATX_STATE.store(1, Ordering::Relaxed);
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return None;
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}
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STATX_STATE.store(2, Ordering::Relaxed);
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}
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1 => return None,
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_ => {}
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}
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let mut buf: libc::statx = mem::zeroed();
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if let Err(err) = cvt(statx(fd, path, flags, mask, &mut buf)) {
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return Some(Err(err));
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}
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// We cannot fill `stat64` exhaustively because of private padding fields.
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let mut stat: stat64 = mem::zeroed();
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// `c_ulong` on gnu-mips, `dev_t` otherwise
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stat.st_dev = libc::makedev(buf.stx_dev_major, buf.stx_dev_minor) as _;
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stat.st_ino = buf.stx_ino as libc::ino64_t;
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stat.st_nlink = buf.stx_nlink as libc::nlink_t;
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stat.st_mode = buf.stx_mode as libc::mode_t;
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stat.st_uid = buf.stx_uid as libc::uid_t;
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stat.st_gid = buf.stx_gid as libc::gid_t;
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stat.st_rdev = libc::makedev(buf.stx_rdev_major, buf.stx_rdev_minor) as _;
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stat.st_size = buf.stx_size as off64_t;
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stat.st_blksize = buf.stx_blksize as libc::blksize_t;
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stat.st_blocks = buf.stx_blocks as libc::blkcnt64_t;
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stat.st_atime = buf.stx_atime.tv_sec as libc::time_t;
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// `i64` on gnu-x86_64-x32, `c_ulong` otherwise.
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stat.st_atime_nsec = buf.stx_atime.tv_nsec as _;
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stat.st_mtime = buf.stx_mtime.tv_sec as libc::time_t;
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stat.st_mtime_nsec = buf.stx_mtime.tv_nsec as _;
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stat.st_ctime = buf.stx_ctime.tv_sec as libc::time_t;
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stat.st_ctime_nsec = buf.stx_ctime.tv_nsec as _;
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let extra = StatxExtraFields {
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stx_mask: buf.stx_mask,
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stx_btime: buf.stx_btime,
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// Store full times to avoid 32-bit `time_t` truncation.
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#[cfg(target_pointer_width = "32")]
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stx_atime: buf.stx_atime,
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#[cfg(target_pointer_width = "32")]
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stx_ctime: buf.stx_ctime,
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#[cfg(target_pointer_width = "32")]
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stx_mtime: buf.stx_mtime,
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};
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Some(Ok(FileAttr { stat, statx_extra_fields: Some(extra) }))
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}
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} else {
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#[derive(Clone)]
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pub struct FileAttr {
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stat: stat64,
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}
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}}
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// all DirEntry's will have a reference to this struct
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struct InnerReadDir {
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dirp: Dir,
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root: PathBuf,
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}
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pub struct ReadDir {
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inner: Arc<InnerReadDir>,
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#[cfg(not(any(
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target_os = "android",
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target_os = "linux",
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target_os = "solaris",
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target_os = "illumos",
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target_os = "fuchsia",
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target_os = "redox",
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)))]
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end_of_stream: bool,
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}
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struct Dir(*mut libc::DIR);
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unsafe impl Send for Dir {}
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unsafe impl Sync for Dir {}
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#[cfg(any(
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target_os = "android",
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target_os = "linux",
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target_os = "solaris",
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target_os = "illumos",
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target_os = "fuchsia",
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target_os = "redox"
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))]
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pub struct DirEntry {
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dir: Arc<InnerReadDir>,
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entry: dirent64_min,
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// We need to store an owned copy of the entry name on platforms that use
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// readdir() (not readdir_r()), because a) struct dirent may use a flexible
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// array to store the name, b) it lives only until the next readdir() call.
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name: crate::ffi::CString,
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}
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// Define a minimal subset of fields we need from `dirent64`, especially since
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// we're not using the immediate `d_name` on these targets. Keeping this as an
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// `entry` field in `DirEntry` helps reduce the `cfg` boilerplate elsewhere.
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#[cfg(any(
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target_os = "android",
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target_os = "linux",
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target_os = "solaris",
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target_os = "illumos",
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target_os = "fuchsia",
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target_os = "redox"
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))]
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struct dirent64_min {
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d_ino: u64,
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#[cfg(not(any(target_os = "solaris", target_os = "illumos")))]
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d_type: u8,
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}
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#[cfg(not(any(
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target_os = "android",
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target_os = "linux",
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target_os = "solaris",
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target_os = "illumos",
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target_os = "fuchsia",
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target_os = "redox"
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)))]
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pub struct DirEntry {
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dir: Arc<InnerReadDir>,
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// The full entry includes a fixed-length `d_name`.
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entry: dirent64,
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}
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#[derive(Clone, Debug)]
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pub struct OpenOptions {
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// generic
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read: bool,
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write: bool,
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append: bool,
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truncate: bool,
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create: bool,
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create_new: bool,
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// system-specific
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custom_flags: i32,
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mode: mode_t,
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}
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#[derive(Clone, PartialEq, Eq, Debug)]
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pub struct FilePermissions {
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mode: mode_t,
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}
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#[derive(Copy, Clone, Debug, Default)]
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pub struct FileTimes {
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accessed: Option<SystemTime>,
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modified: Option<SystemTime>,
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}
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#[derive(Copy, Clone, Eq, Debug)]
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pub struct FileType {
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mode: mode_t,
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}
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impl PartialEq for FileType {
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fn eq(&self, other: &Self) -> bool {
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self.masked() == other.masked()
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}
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}
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impl core::hash::Hash for FileType {
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fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
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self.masked().hash(state);
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}
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}
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#[derive(Debug)]
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pub struct DirBuilder {
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mode: mode_t,
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}
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cfg_has_statx! {{
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impl FileAttr {
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fn from_stat64(stat: stat64) -> Self {
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Self { stat, statx_extra_fields: None }
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}
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#[cfg(target_pointer_width = "32")]
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pub fn stx_mtime(&self) -> Option<&libc::statx_timestamp> {
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if let Some(ext) = &self.statx_extra_fields {
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if (ext.stx_mask & libc::STATX_MTIME) != 0 {
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return Some(&ext.stx_mtime);
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}
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}
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None
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}
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#[cfg(target_pointer_width = "32")]
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pub fn stx_atime(&self) -> Option<&libc::statx_timestamp> {
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if let Some(ext) = &self.statx_extra_fields {
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if (ext.stx_mask & libc::STATX_ATIME) != 0 {
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return Some(&ext.stx_atime);
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}
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}
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None
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}
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#[cfg(target_pointer_width = "32")]
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pub fn stx_ctime(&self) -> Option<&libc::statx_timestamp> {
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if let Some(ext) = &self.statx_extra_fields {
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if (ext.stx_mask & libc::STATX_CTIME) != 0 {
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return Some(&ext.stx_ctime);
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}
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}
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None
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}
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}
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} else {
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impl FileAttr {
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fn from_stat64(stat: stat64) -> Self {
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Self { stat }
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}
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}
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}}
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impl FileAttr {
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pub fn size(&self) -> u64 {
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self.stat.st_size as u64
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}
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pub fn perm(&self) -> FilePermissions {
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FilePermissions { mode: (self.stat.st_mode as mode_t) }
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}
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pub fn file_type(&self) -> FileType {
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FileType { mode: self.stat.st_mode as mode_t }
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}
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}
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#[cfg(target_os = "netbsd")]
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impl FileAttr {
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pub fn modified(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::new(self.stat.st_mtime as i64, self.stat.st_mtimensec as i64))
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}
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pub fn accessed(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::new(self.stat.st_atime as i64, self.stat.st_atimensec as i64))
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}
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pub fn created(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::new(self.stat.st_birthtime as i64, self.stat.st_birthtimensec as i64))
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}
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}
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#[cfg(not(target_os = "netbsd"))]
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impl FileAttr {
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#[cfg(not(any(target_os = "vxworks", target_os = "espidf", target_os = "horizon")))]
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pub fn modified(&self) -> io::Result<SystemTime> {
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#[cfg(target_pointer_width = "32")]
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cfg_has_statx! {
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if let Some(mtime) = self.stx_mtime() {
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return Ok(SystemTime::new(mtime.tv_sec, mtime.tv_nsec as i64));
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}
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}
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Ok(SystemTime::new(self.stat.st_mtime as i64, self.stat.st_mtime_nsec as i64))
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}
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#[cfg(any(target_os = "vxworks", target_os = "espidf"))]
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pub fn modified(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::new(self.stat.st_mtime as i64, 0))
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}
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#[cfg(target_os = "horizon")]
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pub fn modified(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::from(self.stat.st_mtim))
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}
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#[cfg(not(any(target_os = "vxworks", target_os = "espidf", target_os = "horizon")))]
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pub fn accessed(&self) -> io::Result<SystemTime> {
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#[cfg(target_pointer_width = "32")]
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cfg_has_statx! {
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if let Some(atime) = self.stx_atime() {
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return Ok(SystemTime::new(atime.tv_sec, atime.tv_nsec as i64));
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}
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}
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Ok(SystemTime::new(self.stat.st_atime as i64, self.stat.st_atime_nsec as i64))
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}
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#[cfg(any(target_os = "vxworks", target_os = "espidf"))]
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pub fn accessed(&self) -> io::Result<SystemTime> {
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Ok(SystemTime::new(self.stat.st_atime as i64, 0))
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}
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#[cfg(target_os = "horizon")]
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pub fn accessed(&self) -> io::Result<SystemTime> {
|
|
Ok(SystemTime::from(self.stat.st_atim))
|
|
}
|
|
|
|
#[cfg(any(
|
|
target_os = "freebsd",
|
|
target_os = "openbsd",
|
|
target_os = "macos",
|
|
target_os = "ios",
|
|
target_os = "watchos",
|
|
))]
|
|
pub fn created(&self) -> io::Result<SystemTime> {
|
|
Ok(SystemTime::new(self.stat.st_birthtime as i64, self.stat.st_birthtime_nsec as i64))
|
|
}
|
|
|
|
#[cfg(not(any(
|
|
target_os = "freebsd",
|
|
target_os = "openbsd",
|
|
target_os = "macos",
|
|
target_os = "ios",
|
|
target_os = "watchos",
|
|
)))]
|
|
pub fn created(&self) -> io::Result<SystemTime> {
|
|
cfg_has_statx! {
|
|
if let Some(ext) = &self.statx_extra_fields {
|
|
return if (ext.stx_mask & libc::STATX_BTIME) != 0 {
|
|
Ok(SystemTime::new(ext.stx_btime.tv_sec, ext.stx_btime.tv_nsec as i64))
|
|
} else {
|
|
Err(io::const_io_error!(
|
|
io::ErrorKind::Uncategorized,
|
|
"creation time is not available for the filesystem",
|
|
))
|
|
};
|
|
}
|
|
}
|
|
|
|
Err(io::const_io_error!(
|
|
io::ErrorKind::Unsupported,
|
|
"creation time is not available on this platform \
|
|
currently",
|
|
))
|
|
}
|
|
}
|
|
|
|
impl AsInner<stat64> for FileAttr {
|
|
fn as_inner(&self) -> &stat64 {
|
|
&self.stat
|
|
}
|
|
}
|
|
|
|
impl FilePermissions {
|
|
pub fn readonly(&self) -> bool {
|
|
// check if any class (owner, group, others) has write permission
|
|
self.mode & 0o222 == 0
|
|
}
|
|
|
|
pub fn set_readonly(&mut self, readonly: bool) {
|
|
if readonly {
|
|
// remove write permission for all classes; equivalent to `chmod a-w <file>`
|
|
self.mode &= !0o222;
|
|
} else {
|
|
// add write permission for all classes; equivalent to `chmod a+w <file>`
|
|
self.mode |= 0o222;
|
|
}
|
|
}
|
|
pub fn mode(&self) -> u32 {
|
|
self.mode as u32
|
|
}
|
|
}
|
|
|
|
impl FileTimes {
|
|
pub fn set_accessed(&mut self, t: SystemTime) {
|
|
self.accessed = Some(t);
|
|
}
|
|
|
|
pub fn set_modified(&mut self, t: SystemTime) {
|
|
self.modified = Some(t);
|
|
}
|
|
}
|
|
|
|
impl FileType {
|
|
pub fn is_dir(&self) -> bool {
|
|
self.is(libc::S_IFDIR)
|
|
}
|
|
pub fn is_file(&self) -> bool {
|
|
self.is(libc::S_IFREG)
|
|
}
|
|
pub fn is_symlink(&self) -> bool {
|
|
self.is(libc::S_IFLNK)
|
|
}
|
|
|
|
pub fn is(&self, mode: mode_t) -> bool {
|
|
self.mode & libc::S_IFMT == mode
|
|
}
|
|
|
|
fn masked(&self) -> mode_t {
|
|
self.mode & libc::S_IFMT
|
|
}
|
|
}
|
|
|
|
impl FromInner<u32> for FilePermissions {
|
|
fn from_inner(mode: u32) -> FilePermissions {
|
|
FilePermissions { mode: mode as mode_t }
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for ReadDir {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
// This will only be called from std::fs::ReadDir, which will add a "ReadDir()" frame.
|
|
// Thus the result will be e g 'ReadDir("/home")'
|
|
fmt::Debug::fmt(&*self.inner.root, f)
|
|
}
|
|
}
|
|
|
|
impl Iterator for ReadDir {
|
|
type Item = io::Result<DirEntry>;
|
|
|
|
#[cfg(any(
|
|
target_os = "android",
|
|
target_os = "linux",
|
|
target_os = "solaris",
|
|
target_os = "fuchsia",
|
|
target_os = "redox",
|
|
target_os = "illumos"
|
|
))]
|
|
fn next(&mut self) -> Option<io::Result<DirEntry>> {
|
|
unsafe {
|
|
loop {
|
|
// As of POSIX.1-2017, readdir() is not required to be thread safe; only
|
|
// readdir_r() is. However, readdir_r() cannot correctly handle platforms
|
|
// with unlimited or variable NAME_MAX. Many modern platforms guarantee
|
|
// thread safety for readdir() as long an individual DIR* is not accessed
|
|
// concurrently, which is sufficient for Rust.
|
|
super::os::set_errno(0);
|
|
let entry_ptr = readdir64(self.inner.dirp.0);
|
|
if entry_ptr.is_null() {
|
|
// null can mean either the end is reached or an error occurred.
|
|
// So we had to clear errno beforehand to check for an error now.
|
|
return match super::os::errno() {
|
|
0 => None,
|
|
e => Some(Err(Error::from_raw_os_error(e))),
|
|
};
|
|
}
|
|
|
|
// The dirent64 struct is a weird imaginary thing that isn't ever supposed
|
|
// to be worked with by value. Its trailing d_name field is declared
|
|
// variously as [c_char; 256] or [c_char; 1] on different systems but
|
|
// either way that size is meaningless; only the offset of d_name is
|
|
// meaningful. The dirent64 pointers that libc returns from readdir64 are
|
|
// allowed to point to allocations smaller _or_ LARGER than implied by the
|
|
// definition of the struct.
|
|
//
|
|
// As such, we need to be even more careful with dirent64 than if its
|
|
// contents were "simply" partially initialized data.
|
|
//
|
|
// Like for uninitialized contents, converting entry_ptr to `&dirent64`
|
|
// would not be legal. However, unique to dirent64 is that we don't even
|
|
// get to use `addr_of!((*entry_ptr).d_name)` because that operation
|
|
// requires the full extent of *entry_ptr to be in bounds of the same
|
|
// allocation, which is not necessarily the case here.
|
|
//
|
|
// Absent any other way to obtain a pointer to `(*entry_ptr).d_name`
|
|
// legally in Rust analogously to how it would be done in C, we instead
|
|
// need to make our own non-libc allocation that conforms to the weird
|
|
// imaginary definition of dirent64, and use that for a field offset
|
|
// computation.
|
|
macro_rules! offset_ptr {
|
|
($entry_ptr:expr, $field:ident) => {{
|
|
const OFFSET: isize = {
|
|
let delusion = MaybeUninit::<dirent64>::uninit();
|
|
let entry_ptr = delusion.as_ptr();
|
|
unsafe {
|
|
ptr::addr_of!((*entry_ptr).$field)
|
|
.cast::<u8>()
|
|
.offset_from(entry_ptr.cast::<u8>())
|
|
}
|
|
};
|
|
if true {
|
|
// Cast to the same type determined by the else branch.
|
|
$entry_ptr.byte_offset(OFFSET).cast::<_>()
|
|
} else {
|
|
#[allow(deref_nullptr)]
|
|
{
|
|
ptr::addr_of!((*ptr::null::<dirent64>()).$field)
|
|
}
|
|
}
|
|
}};
|
|
}
|
|
|
|
// d_name is guaranteed to be null-terminated.
|
|
let name = CStr::from_ptr(offset_ptr!(entry_ptr, d_name).cast());
|
|
let name_bytes = name.to_bytes();
|
|
if name_bytes == b"." || name_bytes == b".." {
|
|
continue;
|
|
}
|
|
|
|
let entry = dirent64_min {
|
|
d_ino: *offset_ptr!(entry_ptr, d_ino) as u64,
|
|
#[cfg(not(any(target_os = "solaris", target_os = "illumos")))]
|
|
d_type: *offset_ptr!(entry_ptr, d_type) as u8,
|
|
};
|
|
|
|
return Some(Ok(DirEntry {
|
|
entry,
|
|
name: name.to_owned(),
|
|
dir: Arc::clone(&self.inner),
|
|
}));
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(not(any(
|
|
target_os = "android",
|
|
target_os = "linux",
|
|
target_os = "solaris",
|
|
target_os = "fuchsia",
|
|
target_os = "redox",
|
|
target_os = "illumos"
|
|
)))]
|
|
fn next(&mut self) -> Option<io::Result<DirEntry>> {
|
|
if self.end_of_stream {
|
|
return None;
|
|
}
|
|
|
|
unsafe {
|
|
let mut ret = DirEntry { entry: mem::zeroed(), dir: Arc::clone(&self.inner) };
|
|
let mut entry_ptr = ptr::null_mut();
|
|
loop {
|
|
let err = readdir64_r(self.inner.dirp.0, &mut ret.entry, &mut entry_ptr);
|
|
if err != 0 {
|
|
if entry_ptr.is_null() {
|
|
// We encountered an error (which will be returned in this iteration), but
|
|
// we also reached the end of the directory stream. The `end_of_stream`
|
|
// flag is enabled to make sure that we return `None` in the next iteration
|
|
// (instead of looping forever)
|
|
self.end_of_stream = true;
|
|
}
|
|
return Some(Err(Error::from_raw_os_error(err)));
|
|
}
|
|
if entry_ptr.is_null() {
|
|
return None;
|
|
}
|
|
if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
|
|
return Some(Ok(ret));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Drop for Dir {
|
|
fn drop(&mut self) {
|
|
let r = unsafe { libc::closedir(self.0) };
|
|
assert!(
|
|
r == 0 || crate::io::Error::last_os_error().kind() == crate::io::ErrorKind::Interrupted,
|
|
"unexpected error during closedir: {:?}",
|
|
crate::io::Error::last_os_error()
|
|
);
|
|
}
|
|
}
|
|
|
|
impl DirEntry {
|
|
pub fn path(&self) -> PathBuf {
|
|
self.dir.root.join(self.file_name_os_str())
|
|
}
|
|
|
|
pub fn file_name(&self) -> OsString {
|
|
self.file_name_os_str().to_os_string()
|
|
}
|
|
|
|
#[cfg(all(
|
|
any(target_os = "linux", target_os = "emscripten", target_os = "android"),
|
|
not(miri)
|
|
))]
|
|
pub fn metadata(&self) -> io::Result<FileAttr> {
|
|
let fd = cvt(unsafe { dirfd(self.dir.dirp.0) })?;
|
|
let name = self.name_cstr().as_ptr();
|
|
|
|
cfg_has_statx! {
|
|
if let Some(ret) = unsafe { try_statx(
|
|
fd,
|
|
name,
|
|
libc::AT_SYMLINK_NOFOLLOW | libc::AT_STATX_SYNC_AS_STAT,
|
|
libc::STATX_ALL,
|
|
) } {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
let mut stat: stat64 = unsafe { mem::zeroed() };
|
|
cvt(unsafe { fstatat64(fd, name, &mut stat, libc::AT_SYMLINK_NOFOLLOW) })?;
|
|
Ok(FileAttr::from_stat64(stat))
|
|
}
|
|
|
|
#[cfg(any(
|
|
not(any(target_os = "linux", target_os = "emscripten", target_os = "android")),
|
|
miri
|
|
))]
|
|
pub fn metadata(&self) -> io::Result<FileAttr> {
|
|
lstat(&self.path())
|
|
}
|
|
|
|
#[cfg(any(
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "haiku",
|
|
target_os = "vxworks"
|
|
))]
|
|
pub fn file_type(&self) -> io::Result<FileType> {
|
|
self.metadata().map(|m| m.file_type())
|
|
}
|
|
|
|
#[cfg(not(any(
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "haiku",
|
|
target_os = "vxworks"
|
|
)))]
|
|
pub fn file_type(&self) -> io::Result<FileType> {
|
|
match self.entry.d_type {
|
|
libc::DT_CHR => Ok(FileType { mode: libc::S_IFCHR }),
|
|
libc::DT_FIFO => Ok(FileType { mode: libc::S_IFIFO }),
|
|
libc::DT_LNK => Ok(FileType { mode: libc::S_IFLNK }),
|
|
libc::DT_REG => Ok(FileType { mode: libc::S_IFREG }),
|
|
libc::DT_SOCK => Ok(FileType { mode: libc::S_IFSOCK }),
|
|
libc::DT_DIR => Ok(FileType { mode: libc::S_IFDIR }),
|
|
libc::DT_BLK => Ok(FileType { mode: libc::S_IFBLK }),
|
|
_ => self.metadata().map(|m| m.file_type()),
|
|
}
|
|
}
|
|
|
|
#[cfg(any(
|
|
target_os = "macos",
|
|
target_os = "ios",
|
|
target_os = "watchos",
|
|
target_os = "linux",
|
|
target_os = "emscripten",
|
|
target_os = "android",
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "haiku",
|
|
target_os = "l4re",
|
|
target_os = "fuchsia",
|
|
target_os = "redox",
|
|
target_os = "vxworks",
|
|
target_os = "espidf",
|
|
target_os = "horizon"
|
|
))]
|
|
pub fn ino(&self) -> u64 {
|
|
self.entry.d_ino as u64
|
|
}
|
|
|
|
#[cfg(any(
|
|
target_os = "freebsd",
|
|
target_os = "openbsd",
|
|
target_os = "netbsd",
|
|
target_os = "dragonfly"
|
|
))]
|
|
pub fn ino(&self) -> u64 {
|
|
self.entry.d_fileno as u64
|
|
}
|
|
|
|
#[cfg(any(
|
|
target_os = "macos",
|
|
target_os = "ios",
|
|
target_os = "watchos",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
target_os = "freebsd",
|
|
target_os = "dragonfly"
|
|
))]
|
|
fn name_bytes(&self) -> &[u8] {
|
|
use crate::slice;
|
|
unsafe {
|
|
slice::from_raw_parts(
|
|
self.entry.d_name.as_ptr() as *const u8,
|
|
self.entry.d_namlen as usize,
|
|
)
|
|
}
|
|
}
|
|
#[cfg(not(any(
|
|
target_os = "macos",
|
|
target_os = "ios",
|
|
target_os = "watchos",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
target_os = "freebsd",
|
|
target_os = "dragonfly"
|
|
)))]
|
|
fn name_bytes(&self) -> &[u8] {
|
|
self.name_cstr().to_bytes()
|
|
}
|
|
|
|
#[cfg(not(any(
|
|
target_os = "android",
|
|
target_os = "linux",
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "fuchsia",
|
|
target_os = "redox"
|
|
)))]
|
|
fn name_cstr(&self) -> &CStr {
|
|
unsafe { CStr::from_ptr(self.entry.d_name.as_ptr()) }
|
|
}
|
|
#[cfg(any(
|
|
target_os = "android",
|
|
target_os = "linux",
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "fuchsia",
|
|
target_os = "redox"
|
|
))]
|
|
fn name_cstr(&self) -> &CStr {
|
|
&self.name
|
|
}
|
|
|
|
pub fn file_name_os_str(&self) -> &OsStr {
|
|
OsStr::from_bytes(self.name_bytes())
|
|
}
|
|
}
|
|
|
|
impl OpenOptions {
|
|
pub fn new() -> OpenOptions {
|
|
OpenOptions {
|
|
// generic
|
|
read: false,
|
|
write: false,
|
|
append: false,
|
|
truncate: false,
|
|
create: false,
|
|
create_new: false,
|
|
// system-specific
|
|
custom_flags: 0,
|
|
mode: 0o666,
|
|
}
|
|
}
|
|
|
|
pub fn read(&mut self, read: bool) {
|
|
self.read = read;
|
|
}
|
|
pub fn write(&mut self, write: bool) {
|
|
self.write = write;
|
|
}
|
|
pub fn append(&mut self, append: bool) {
|
|
self.append = append;
|
|
}
|
|
pub fn truncate(&mut self, truncate: bool) {
|
|
self.truncate = truncate;
|
|
}
|
|
pub fn create(&mut self, create: bool) {
|
|
self.create = create;
|
|
}
|
|
pub fn create_new(&mut self, create_new: bool) {
|
|
self.create_new = create_new;
|
|
}
|
|
|
|
pub fn custom_flags(&mut self, flags: i32) {
|
|
self.custom_flags = flags;
|
|
}
|
|
pub fn mode(&mut self, mode: u32) {
|
|
self.mode = mode as mode_t;
|
|
}
|
|
|
|
fn get_access_mode(&self) -> io::Result<c_int> {
|
|
match (self.read, self.write, self.append) {
|
|
(true, false, false) => Ok(libc::O_RDONLY),
|
|
(false, true, false) => Ok(libc::O_WRONLY),
|
|
(true, true, false) => Ok(libc::O_RDWR),
|
|
(false, _, true) => Ok(libc::O_WRONLY | libc::O_APPEND),
|
|
(true, _, true) => Ok(libc::O_RDWR | libc::O_APPEND),
|
|
(false, false, false) => Err(Error::from_raw_os_error(libc::EINVAL)),
|
|
}
|
|
}
|
|
|
|
fn get_creation_mode(&self) -> io::Result<c_int> {
|
|
match (self.write, self.append) {
|
|
(true, false) => {}
|
|
(false, false) => {
|
|
if self.truncate || self.create || self.create_new {
|
|
return Err(Error::from_raw_os_error(libc::EINVAL));
|
|
}
|
|
}
|
|
(_, true) => {
|
|
if self.truncate && !self.create_new {
|
|
return Err(Error::from_raw_os_error(libc::EINVAL));
|
|
}
|
|
}
|
|
}
|
|
|
|
Ok(match (self.create, self.truncate, self.create_new) {
|
|
(false, false, false) => 0,
|
|
(true, false, false) => libc::O_CREAT,
|
|
(false, true, false) => libc::O_TRUNC,
|
|
(true, true, false) => libc::O_CREAT | libc::O_TRUNC,
|
|
(_, _, true) => libc::O_CREAT | libc::O_EXCL,
|
|
})
|
|
}
|
|
}
|
|
|
|
impl File {
|
|
pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
|
|
run_path_with_cstr(path, |path| File::open_c(path, opts))
|
|
}
|
|
|
|
pub fn open_c(path: &CStr, opts: &OpenOptions) -> io::Result<File> {
|
|
let flags = libc::O_CLOEXEC
|
|
| opts.get_access_mode()?
|
|
| opts.get_creation_mode()?
|
|
| (opts.custom_flags as c_int & !libc::O_ACCMODE);
|
|
// The third argument of `open64` is documented to have type `mode_t`. On
|
|
// some platforms (like macOS, where `open64` is actually `open`), `mode_t` is `u16`.
|
|
// However, since this is a variadic function, C integer promotion rules mean that on
|
|
// the ABI level, this still gets passed as `c_int` (aka `u32` on Unix platforms).
|
|
let fd = cvt_r(|| unsafe { open64(path.as_ptr(), flags, opts.mode as c_int) })?;
|
|
Ok(File(unsafe { FileDesc::from_raw_fd(fd) }))
|
|
}
|
|
|
|
pub fn file_attr(&self) -> io::Result<FileAttr> {
|
|
let fd = self.as_raw_fd();
|
|
|
|
cfg_has_statx! {
|
|
if let Some(ret) = unsafe { try_statx(
|
|
fd,
|
|
b"\0" as *const _ as *const c_char,
|
|
libc::AT_EMPTY_PATH | libc::AT_STATX_SYNC_AS_STAT,
|
|
libc::STATX_ALL,
|
|
) } {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
let mut stat: stat64 = unsafe { mem::zeroed() };
|
|
cvt(unsafe { fstat64(fd, &mut stat) })?;
|
|
Ok(FileAttr::from_stat64(stat))
|
|
}
|
|
|
|
pub fn fsync(&self) -> io::Result<()> {
|
|
cvt_r(|| unsafe { os_fsync(self.as_raw_fd()) })?;
|
|
return Ok(());
|
|
|
|
#[cfg(any(target_os = "macos", target_os = "ios", target_os = "watchos"))]
|
|
unsafe fn os_fsync(fd: c_int) -> c_int {
|
|
libc::fcntl(fd, libc::F_FULLFSYNC)
|
|
}
|
|
#[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "watchos")))]
|
|
unsafe fn os_fsync(fd: c_int) -> c_int {
|
|
libc::fsync(fd)
|
|
}
|
|
}
|
|
|
|
pub fn datasync(&self) -> io::Result<()> {
|
|
cvt_r(|| unsafe { os_datasync(self.as_raw_fd()) })?;
|
|
return Ok(());
|
|
|
|
#[cfg(any(target_os = "macos", target_os = "ios", target_os = "watchos"))]
|
|
unsafe fn os_datasync(fd: c_int) -> c_int {
|
|
libc::fcntl(fd, libc::F_FULLFSYNC)
|
|
}
|
|
#[cfg(any(
|
|
target_os = "freebsd",
|
|
target_os = "linux",
|
|
target_os = "android",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd"
|
|
))]
|
|
unsafe fn os_datasync(fd: c_int) -> c_int {
|
|
libc::fdatasync(fd)
|
|
}
|
|
#[cfg(not(any(
|
|
target_os = "android",
|
|
target_os = "freebsd",
|
|
target_os = "ios",
|
|
target_os = "linux",
|
|
target_os = "macos",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
target_os = "watchos",
|
|
)))]
|
|
unsafe fn os_datasync(fd: c_int) -> c_int {
|
|
libc::fsync(fd)
|
|
}
|
|
}
|
|
|
|
pub fn truncate(&self, size: u64) -> io::Result<()> {
|
|
let size: off64_t =
|
|
size.try_into().map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))?;
|
|
cvt_r(|| unsafe { ftruncate64(self.as_raw_fd(), size) }).map(drop)
|
|
}
|
|
|
|
pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
|
|
self.0.read(buf)
|
|
}
|
|
|
|
pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
|
|
self.0.read_vectored(bufs)
|
|
}
|
|
|
|
#[inline]
|
|
pub fn is_read_vectored(&self) -> bool {
|
|
self.0.is_read_vectored()
|
|
}
|
|
|
|
pub fn read_at(&self, buf: &mut [u8], offset: u64) -> io::Result<usize> {
|
|
self.0.read_at(buf, offset)
|
|
}
|
|
|
|
pub fn read_buf(&self, cursor: BorrowedCursor<'_>) -> io::Result<()> {
|
|
self.0.read_buf(cursor)
|
|
}
|
|
|
|
pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
|
|
self.0.write(buf)
|
|
}
|
|
|
|
pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
|
|
self.0.write_vectored(bufs)
|
|
}
|
|
|
|
#[inline]
|
|
pub fn is_write_vectored(&self) -> bool {
|
|
self.0.is_write_vectored()
|
|
}
|
|
|
|
pub fn write_at(&self, buf: &[u8], offset: u64) -> io::Result<usize> {
|
|
self.0.write_at(buf, offset)
|
|
}
|
|
|
|
pub fn flush(&self) -> io::Result<()> {
|
|
Ok(())
|
|
}
|
|
|
|
pub fn seek(&self, pos: SeekFrom) -> io::Result<u64> {
|
|
let (whence, pos) = match pos {
|
|
// Casting to `i64` is fine, too large values will end up as
|
|
// negative which will cause an error in `lseek64`.
|
|
SeekFrom::Start(off) => (libc::SEEK_SET, off as i64),
|
|
SeekFrom::End(off) => (libc::SEEK_END, off),
|
|
SeekFrom::Current(off) => (libc::SEEK_CUR, off),
|
|
};
|
|
let n = cvt(unsafe { lseek64(self.as_raw_fd(), pos as off64_t, whence) })?;
|
|
Ok(n as u64)
|
|
}
|
|
|
|
pub fn duplicate(&self) -> io::Result<File> {
|
|
self.0.duplicate().map(File)
|
|
}
|
|
|
|
pub fn set_permissions(&self, perm: FilePermissions) -> io::Result<()> {
|
|
cvt_r(|| unsafe { libc::fchmod(self.as_raw_fd(), perm.mode) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn set_times(&self, times: FileTimes) -> io::Result<()> {
|
|
#[cfg(not(any(target_os = "redox", target_os = "espidf", target_os = "horizon")))]
|
|
let to_timespec = |time: Option<SystemTime>| {
|
|
match time {
|
|
Some(time) if let Some(ts) = time.t.to_timespec() => Ok(ts),
|
|
Some(time) if time > crate::sys::time::UNIX_EPOCH => Err(io::const_io_error!(io::ErrorKind::InvalidInput, "timestamp is too large to set as a file time")),
|
|
Some(_) => Err(io::const_io_error!(io::ErrorKind::InvalidInput, "timestamp is too small to set as a file time")),
|
|
None => Ok(libc::timespec { tv_sec: 0, tv_nsec: libc::UTIME_OMIT as _ }),
|
|
}
|
|
};
|
|
#[cfg(not(any(target_os = "redox", target_os = "espidf", target_os = "horizon")))]
|
|
let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
|
|
cfg_if::cfg_if! {
|
|
if #[cfg(any(target_os = "redox", target_os = "espidf", target_os = "horizon"))] {
|
|
// Redox doesn't appear to support `UTIME_OMIT`.
|
|
// ESP-IDF and HorizonOS do not support `futimens` at all and the behavior for those OS is therefore
|
|
// the same as for Redox.
|
|
drop(times);
|
|
Err(io::const_io_error!(
|
|
io::ErrorKind::Unsupported,
|
|
"setting file times not supported",
|
|
))
|
|
} else if #[cfg(any(target_os = "android", target_os = "macos"))] {
|
|
// futimens requires macOS 10.13, and Android API level 19
|
|
cvt(unsafe {
|
|
weak!(fn futimens(c_int, *const libc::timespec) -> c_int);
|
|
match futimens.get() {
|
|
Some(futimens) => futimens(self.as_raw_fd(), times.as_ptr()),
|
|
#[cfg(target_os = "macos")]
|
|
None => {
|
|
fn ts_to_tv(ts: &libc::timespec) -> libc::timeval {
|
|
libc::timeval {
|
|
tv_sec: ts.tv_sec,
|
|
tv_usec: (ts.tv_nsec / 1000) as _
|
|
}
|
|
}
|
|
let timevals = [ts_to_tv(×[0]), ts_to_tv(×[1])];
|
|
libc::futimes(self.as_raw_fd(), timevals.as_ptr())
|
|
}
|
|
// futimes requires even newer Android.
|
|
#[cfg(target_os = "android")]
|
|
None => return Err(io::const_io_error!(
|
|
io::ErrorKind::Unsupported,
|
|
"setting file times requires Android API level >= 19",
|
|
)),
|
|
}
|
|
})?;
|
|
Ok(())
|
|
} else {
|
|
cvt(unsafe { libc::futimens(self.as_raw_fd(), times.as_ptr()) })?;
|
|
Ok(())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl DirBuilder {
|
|
pub fn new() -> DirBuilder {
|
|
DirBuilder { mode: 0o777 }
|
|
}
|
|
|
|
pub fn mkdir(&self, p: &Path) -> io::Result<()> {
|
|
run_path_with_cstr(p, |p| cvt(unsafe { libc::mkdir(p.as_ptr(), self.mode) }).map(|_| ()))
|
|
}
|
|
|
|
pub fn set_mode(&mut self, mode: u32) {
|
|
self.mode = mode as mode_t;
|
|
}
|
|
}
|
|
|
|
impl AsInner<FileDesc> for File {
|
|
fn as_inner(&self) -> &FileDesc {
|
|
&self.0
|
|
}
|
|
}
|
|
|
|
impl AsInnerMut<FileDesc> for File {
|
|
fn as_inner_mut(&mut self) -> &mut FileDesc {
|
|
&mut self.0
|
|
}
|
|
}
|
|
|
|
impl IntoInner<FileDesc> for File {
|
|
fn into_inner(self) -> FileDesc {
|
|
self.0
|
|
}
|
|
}
|
|
|
|
impl FromInner<FileDesc> for File {
|
|
fn from_inner(file_desc: FileDesc) -> Self {
|
|
Self(file_desc)
|
|
}
|
|
}
|
|
|
|
impl AsFd for File {
|
|
fn as_fd(&self) -> BorrowedFd<'_> {
|
|
self.0.as_fd()
|
|
}
|
|
}
|
|
|
|
impl AsRawFd for File {
|
|
fn as_raw_fd(&self) -> RawFd {
|
|
self.0.as_raw_fd()
|
|
}
|
|
}
|
|
|
|
impl IntoRawFd for File {
|
|
fn into_raw_fd(self) -> RawFd {
|
|
self.0.into_raw_fd()
|
|
}
|
|
}
|
|
|
|
impl FromRawFd for File {
|
|
unsafe fn from_raw_fd(raw_fd: RawFd) -> Self {
|
|
Self(FromRawFd::from_raw_fd(raw_fd))
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for File {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
#[cfg(any(
|
|
target_os = "linux",
|
|
target_os = "netbsd",
|
|
target_os = "illumos",
|
|
target_os = "solaris"
|
|
))]
|
|
fn get_path(fd: c_int) -> Option<PathBuf> {
|
|
let mut p = PathBuf::from("/proc/self/fd");
|
|
p.push(&fd.to_string());
|
|
readlink(&p).ok()
|
|
}
|
|
|
|
#[cfg(target_os = "macos")]
|
|
fn get_path(fd: c_int) -> Option<PathBuf> {
|
|
// FIXME: 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; libc::PATH_MAX as usize];
|
|
let n = unsafe { libc::fcntl(fd, libc::F_GETPATH, buf.as_ptr()) };
|
|
if n == -1 {
|
|
return None;
|
|
}
|
|
let l = buf.iter().position(|&c| c == 0).unwrap();
|
|
buf.truncate(l as usize);
|
|
buf.shrink_to_fit();
|
|
Some(PathBuf::from(OsString::from_vec(buf)))
|
|
}
|
|
|
|
#[cfg(all(target_os = "freebsd", target_arch = "x86_64"))]
|
|
fn get_path(fd: c_int) -> Option<PathBuf> {
|
|
let info = Box::<libc::kinfo_file>::new_zeroed();
|
|
let mut info = unsafe { info.assume_init() };
|
|
info.kf_structsize = mem::size_of::<libc::kinfo_file>() as libc::c_int;
|
|
let n = unsafe { libc::fcntl(fd, libc::F_KINFO, &mut *info) };
|
|
if n == -1 {
|
|
return None;
|
|
}
|
|
let buf = unsafe { CStr::from_ptr(info.kf_path.as_mut_ptr()).to_bytes().to_vec() };
|
|
Some(PathBuf::from(OsString::from_vec(buf)))
|
|
}
|
|
|
|
#[cfg(target_os = "vxworks")]
|
|
fn get_path(fd: c_int) -> Option<PathBuf> {
|
|
let mut buf = vec![0; libc::PATH_MAX as usize];
|
|
let n = unsafe { libc::ioctl(fd, libc::FIOGETNAME, buf.as_ptr()) };
|
|
if n == -1 {
|
|
return None;
|
|
}
|
|
let l = buf.iter().position(|&c| c == 0).unwrap();
|
|
buf.truncate(l as usize);
|
|
Some(PathBuf::from(OsString::from_vec(buf)))
|
|
}
|
|
|
|
#[cfg(not(any(
|
|
target_os = "linux",
|
|
target_os = "macos",
|
|
target_os = "vxworks",
|
|
all(target_os = "freebsd", target_arch = "x86_64"),
|
|
target_os = "netbsd",
|
|
target_os = "illumos",
|
|
target_os = "solaris"
|
|
)))]
|
|
fn get_path(_fd: c_int) -> Option<PathBuf> {
|
|
// FIXME(#24570): implement this for other Unix platforms
|
|
None
|
|
}
|
|
|
|
#[cfg(any(
|
|
target_os = "linux",
|
|
target_os = "macos",
|
|
target_os = "freebsd",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
target_os = "vxworks"
|
|
))]
|
|
fn get_mode(fd: c_int) -> Option<(bool, bool)> {
|
|
let mode = unsafe { libc::fcntl(fd, libc::F_GETFL) };
|
|
if mode == -1 {
|
|
return None;
|
|
}
|
|
match mode & libc::O_ACCMODE {
|
|
libc::O_RDONLY => Some((true, false)),
|
|
libc::O_RDWR => Some((true, true)),
|
|
libc::O_WRONLY => Some((false, true)),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
#[cfg(not(any(
|
|
target_os = "linux",
|
|
target_os = "macos",
|
|
target_os = "freebsd",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
target_os = "vxworks"
|
|
)))]
|
|
fn get_mode(_fd: c_int) -> Option<(bool, bool)> {
|
|
// FIXME(#24570): implement this for other Unix platforms
|
|
None
|
|
}
|
|
|
|
let fd = self.as_raw_fd();
|
|
let mut b = f.debug_struct("File");
|
|
b.field("fd", &fd);
|
|
if let Some(path) = get_path(fd) {
|
|
b.field("path", &path);
|
|
}
|
|
if let Some((read, write)) = get_mode(fd) {
|
|
b.field("read", &read).field("write", &write);
|
|
}
|
|
b.finish()
|
|
}
|
|
}
|
|
|
|
pub fn readdir(path: &Path) -> io::Result<ReadDir> {
|
|
let ptr = run_path_with_cstr(path, |p| unsafe { Ok(libc::opendir(p.as_ptr())) })?;
|
|
if ptr.is_null() {
|
|
Err(Error::last_os_error())
|
|
} else {
|
|
let root = path.to_path_buf();
|
|
let inner = InnerReadDir { dirp: Dir(ptr), root };
|
|
Ok(ReadDir {
|
|
inner: Arc::new(inner),
|
|
#[cfg(not(any(
|
|
target_os = "android",
|
|
target_os = "linux",
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "fuchsia",
|
|
target_os = "redox",
|
|
)))]
|
|
end_of_stream: false,
|
|
})
|
|
}
|
|
}
|
|
|
|
pub fn unlink(p: &Path) -> io::Result<()> {
|
|
run_path_with_cstr(p, |p| cvt(unsafe { libc::unlink(p.as_ptr()) }).map(|_| ()))
|
|
}
|
|
|
|
pub fn rename(old: &Path, new: &Path) -> io::Result<()> {
|
|
run_path_with_cstr(old, |old| {
|
|
run_path_with_cstr(new, |new| {
|
|
cvt(unsafe { libc::rename(old.as_ptr(), new.as_ptr()) }).map(|_| ())
|
|
})
|
|
})
|
|
}
|
|
|
|
pub fn set_perm(p: &Path, perm: FilePermissions) -> io::Result<()> {
|
|
run_path_with_cstr(p, |p| cvt_r(|| unsafe { libc::chmod(p.as_ptr(), perm.mode) }).map(|_| ()))
|
|
}
|
|
|
|
pub fn rmdir(p: &Path) -> io::Result<()> {
|
|
run_path_with_cstr(p, |p| cvt(unsafe { libc::rmdir(p.as_ptr()) }).map(|_| ()))
|
|
}
|
|
|
|
pub fn readlink(p: &Path) -> io::Result<PathBuf> {
|
|
run_path_with_cstr(p, |c_path| {
|
|
let p = c_path.as_ptr();
|
|
|
|
let mut buf = Vec::with_capacity(256);
|
|
|
|
loop {
|
|
let buf_read =
|
|
cvt(unsafe { libc::readlink(p, buf.as_mut_ptr() as *mut _, buf.capacity()) })?
|
|
as usize;
|
|
|
|
unsafe {
|
|
buf.set_len(buf_read);
|
|
}
|
|
|
|
if buf_read != buf.capacity() {
|
|
buf.shrink_to_fit();
|
|
|
|
return Ok(PathBuf::from(OsString::from_vec(buf)));
|
|
}
|
|
|
|
// Trigger the internal buffer resizing logic of `Vec` by requiring
|
|
// more space than the current capacity. The length is guaranteed to be
|
|
// the same as the capacity due to the if statement above.
|
|
buf.reserve(1);
|
|
}
|
|
})
|
|
}
|
|
|
|
pub fn symlink(original: &Path, link: &Path) -> io::Result<()> {
|
|
run_path_with_cstr(original, |original| {
|
|
run_path_with_cstr(link, |link| {
|
|
cvt(unsafe { libc::symlink(original.as_ptr(), link.as_ptr()) }).map(|_| ())
|
|
})
|
|
})
|
|
}
|
|
|
|
pub fn link(original: &Path, link: &Path) -> io::Result<()> {
|
|
run_path_with_cstr(original, |original| {
|
|
run_path_with_cstr(link, |link| {
|
|
cfg_if::cfg_if! {
|
|
if #[cfg(any(target_os = "vxworks", target_os = "redox", target_os = "android", target_os = "espidf", target_os = "horizon"))] {
|
|
// VxWorks, Redox and ESP-IDF lack `linkat`, so use `link` instead. POSIX leaves
|
|
// it implementation-defined whether `link` follows symlinks, so rely on the
|
|
// `symlink_hard_link` test in library/std/src/fs/tests.rs to check the behavior.
|
|
// Android has `linkat` on newer versions, but we happen to know `link`
|
|
// always has the correct behavior, so it's here as well.
|
|
cvt(unsafe { libc::link(original.as_ptr(), link.as_ptr()) })?;
|
|
} else if #[cfg(target_os = "macos")] {
|
|
// On MacOS, older versions (<=10.9) lack support for linkat while newer
|
|
// versions have it. We want to use linkat if it is available, so we use weak!
|
|
// to check. `linkat` is preferable to `link` because it gives us a flag to
|
|
// specify how symlinks should be handled. We pass 0 as the flags argument,
|
|
// meaning it shouldn't follow symlinks.
|
|
weak!(fn linkat(c_int, *const c_char, c_int, *const c_char, c_int) -> c_int);
|
|
|
|
if let Some(f) = linkat.get() {
|
|
cvt(unsafe { f(libc::AT_FDCWD, original.as_ptr(), libc::AT_FDCWD, link.as_ptr(), 0) })?;
|
|
} else {
|
|
cvt(unsafe { libc::link(original.as_ptr(), link.as_ptr()) })?;
|
|
};
|
|
} else {
|
|
// Where we can, use `linkat` instead of `link`; see the comment above
|
|
// this one for details on why.
|
|
cvt(unsafe { libc::linkat(libc::AT_FDCWD, original.as_ptr(), libc::AT_FDCWD, link.as_ptr(), 0) })?;
|
|
}
|
|
}
|
|
Ok(())
|
|
})
|
|
})
|
|
}
|
|
|
|
pub fn stat(p: &Path) -> io::Result<FileAttr> {
|
|
run_path_with_cstr(p, |p| {
|
|
cfg_has_statx! {
|
|
if let Some(ret) = unsafe { try_statx(
|
|
libc::AT_FDCWD,
|
|
p.as_ptr(),
|
|
libc::AT_STATX_SYNC_AS_STAT,
|
|
libc::STATX_ALL,
|
|
) } {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
let mut stat: stat64 = unsafe { mem::zeroed() };
|
|
cvt(unsafe { stat64(p.as_ptr(), &mut stat) })?;
|
|
Ok(FileAttr::from_stat64(stat))
|
|
})
|
|
}
|
|
|
|
pub fn lstat(p: &Path) -> io::Result<FileAttr> {
|
|
run_path_with_cstr(p, |p| {
|
|
cfg_has_statx! {
|
|
if let Some(ret) = unsafe { try_statx(
|
|
libc::AT_FDCWD,
|
|
p.as_ptr(),
|
|
libc::AT_SYMLINK_NOFOLLOW | libc::AT_STATX_SYNC_AS_STAT,
|
|
libc::STATX_ALL,
|
|
) } {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
let mut stat: stat64 = unsafe { mem::zeroed() };
|
|
cvt(unsafe { lstat64(p.as_ptr(), &mut stat) })?;
|
|
Ok(FileAttr::from_stat64(stat))
|
|
})
|
|
}
|
|
|
|
pub fn canonicalize(p: &Path) -> io::Result<PathBuf> {
|
|
let r = run_path_with_cstr(p, |path| unsafe {
|
|
Ok(libc::realpath(path.as_ptr(), ptr::null_mut()))
|
|
})?;
|
|
if r.is_null() {
|
|
return Err(io::Error::last_os_error());
|
|
}
|
|
Ok(PathBuf::from(OsString::from_vec(unsafe {
|
|
let buf = CStr::from_ptr(r).to_bytes().to_vec();
|
|
libc::free(r as *mut _);
|
|
buf
|
|
})))
|
|
}
|
|
|
|
fn open_from(from: &Path) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
|
|
use crate::fs::File;
|
|
use crate::sys_common::fs::NOT_FILE_ERROR;
|
|
|
|
let reader = File::open(from)?;
|
|
let metadata = reader.metadata()?;
|
|
if !metadata.is_file() {
|
|
return Err(NOT_FILE_ERROR);
|
|
}
|
|
Ok((reader, metadata))
|
|
}
|
|
|
|
#[cfg(target_os = "espidf")]
|
|
fn open_to_and_set_permissions(
|
|
to: &Path,
|
|
reader_metadata: crate::fs::Metadata,
|
|
) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
|
|
use crate::fs::OpenOptions;
|
|
let writer = OpenOptions::new().open(to)?;
|
|
let writer_metadata = writer.metadata()?;
|
|
Ok((writer, writer_metadata))
|
|
}
|
|
|
|
#[cfg(not(target_os = "espidf"))]
|
|
fn open_to_and_set_permissions(
|
|
to: &Path,
|
|
reader_metadata: crate::fs::Metadata,
|
|
) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
|
|
use crate::fs::OpenOptions;
|
|
use crate::os::unix::fs::{OpenOptionsExt, PermissionsExt};
|
|
|
|
let perm = reader_metadata.permissions();
|
|
let writer = OpenOptions::new()
|
|
// create the file with the correct mode right away
|
|
.mode(perm.mode())
|
|
.write(true)
|
|
.create(true)
|
|
.truncate(true)
|
|
.open(to)?;
|
|
let writer_metadata = writer.metadata()?;
|
|
if writer_metadata.is_file() {
|
|
// Set the correct file permissions, in case the file already existed.
|
|
// Don't set the permissions on already existing non-files like
|
|
// pipes/FIFOs or device nodes.
|
|
writer.set_permissions(perm)?;
|
|
}
|
|
Ok((writer, writer_metadata))
|
|
}
|
|
|
|
#[cfg(not(any(
|
|
target_os = "linux",
|
|
target_os = "android",
|
|
target_os = "macos",
|
|
target_os = "ios",
|
|
target_os = "watchos",
|
|
)))]
|
|
pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
|
|
let (mut reader, reader_metadata) = open_from(from)?;
|
|
let (mut writer, _) = open_to_and_set_permissions(to, reader_metadata)?;
|
|
|
|
io::copy(&mut reader, &mut writer)
|
|
}
|
|
|
|
#[cfg(any(target_os = "linux", target_os = "android"))]
|
|
pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
|
|
let (mut reader, reader_metadata) = open_from(from)?;
|
|
let max_len = u64::MAX;
|
|
let (mut writer, _) = open_to_and_set_permissions(to, reader_metadata)?;
|
|
|
|
use super::kernel_copy::{copy_regular_files, CopyResult};
|
|
|
|
match copy_regular_files(reader.as_raw_fd(), writer.as_raw_fd(), max_len) {
|
|
CopyResult::Ended(bytes) => Ok(bytes),
|
|
CopyResult::Error(e, _) => Err(e),
|
|
CopyResult::Fallback(written) => match io::copy::generic_copy(&mut reader, &mut writer) {
|
|
Ok(bytes) => Ok(bytes + written),
|
|
Err(e) => Err(e),
|
|
},
|
|
}
|
|
}
|
|
|
|
#[cfg(any(target_os = "macos", target_os = "ios", target_os = "watchos"))]
|
|
pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
|
|
use crate::sync::atomic::{AtomicBool, Ordering};
|
|
|
|
const COPYFILE_ACL: u32 = 1 << 0;
|
|
const COPYFILE_STAT: u32 = 1 << 1;
|
|
const COPYFILE_XATTR: u32 = 1 << 2;
|
|
const COPYFILE_DATA: u32 = 1 << 3;
|
|
|
|
const COPYFILE_SECURITY: u32 = COPYFILE_STAT | COPYFILE_ACL;
|
|
const COPYFILE_METADATA: u32 = COPYFILE_SECURITY | COPYFILE_XATTR;
|
|
const COPYFILE_ALL: u32 = COPYFILE_METADATA | COPYFILE_DATA;
|
|
|
|
const COPYFILE_STATE_COPIED: u32 = 8;
|
|
|
|
#[allow(non_camel_case_types)]
|
|
type copyfile_state_t = *mut libc::c_void;
|
|
#[allow(non_camel_case_types)]
|
|
type copyfile_flags_t = u32;
|
|
|
|
extern "C" {
|
|
fn fcopyfile(
|
|
from: libc::c_int,
|
|
to: libc::c_int,
|
|
state: copyfile_state_t,
|
|
flags: copyfile_flags_t,
|
|
) -> libc::c_int;
|
|
fn copyfile_state_alloc() -> copyfile_state_t;
|
|
fn copyfile_state_free(state: copyfile_state_t) -> libc::c_int;
|
|
fn copyfile_state_get(
|
|
state: copyfile_state_t,
|
|
flag: u32,
|
|
dst: *mut libc::c_void,
|
|
) -> libc::c_int;
|
|
}
|
|
|
|
struct FreeOnDrop(copyfile_state_t);
|
|
impl Drop for FreeOnDrop {
|
|
fn drop(&mut self) {
|
|
// The code below ensures that `FreeOnDrop` is never a null pointer
|
|
unsafe {
|
|
// `copyfile_state_free` returns -1 if the `to` or `from` files
|
|
// cannot be closed. However, this is not considered this an
|
|
// error.
|
|
copyfile_state_free(self.0);
|
|
}
|
|
}
|
|
}
|
|
|
|
// MacOS prior to 10.12 don't support `fclonefileat`
|
|
// We store the availability in a global to avoid unnecessary syscalls
|
|
static HAS_FCLONEFILEAT: AtomicBool = AtomicBool::new(true);
|
|
syscall! {
|
|
fn fclonefileat(
|
|
srcfd: libc::c_int,
|
|
dst_dirfd: libc::c_int,
|
|
dst: *const c_char,
|
|
flags: libc::c_int
|
|
) -> libc::c_int
|
|
}
|
|
|
|
let (reader, reader_metadata) = open_from(from)?;
|
|
|
|
// Opportunistically attempt to create a copy-on-write clone of `from`
|
|
// using `fclonefileat`.
|
|
if HAS_FCLONEFILEAT.load(Ordering::Relaxed) {
|
|
let clonefile_result = run_path_with_cstr(to, |to| {
|
|
cvt(unsafe { fclonefileat(reader.as_raw_fd(), libc::AT_FDCWD, to.as_ptr(), 0) })
|
|
});
|
|
match clonefile_result {
|
|
Ok(_) => return Ok(reader_metadata.len()),
|
|
Err(err) => match err.raw_os_error() {
|
|
// `fclonefileat` will fail on non-APFS volumes, if the
|
|
// destination already exists, or if the source and destination
|
|
// are on different devices. In all these cases `fcopyfile`
|
|
// should succeed.
|
|
Some(libc::ENOTSUP) | Some(libc::EEXIST) | Some(libc::EXDEV) => (),
|
|
Some(libc::ENOSYS) => HAS_FCLONEFILEAT.store(false, Ordering::Relaxed),
|
|
_ => return Err(err),
|
|
},
|
|
}
|
|
}
|
|
|
|
// Fall back to using `fcopyfile` if `fclonefileat` does not succeed.
|
|
let (writer, writer_metadata) = open_to_and_set_permissions(to, reader_metadata)?;
|
|
|
|
// We ensure that `FreeOnDrop` never contains a null pointer so it is
|
|
// always safe to call `copyfile_state_free`
|
|
let state = unsafe {
|
|
let state = copyfile_state_alloc();
|
|
if state.is_null() {
|
|
return Err(crate::io::Error::last_os_error());
|
|
}
|
|
FreeOnDrop(state)
|
|
};
|
|
|
|
let flags = if writer_metadata.is_file() { COPYFILE_ALL } else { COPYFILE_DATA };
|
|
|
|
cvt(unsafe { fcopyfile(reader.as_raw_fd(), writer.as_raw_fd(), state.0, flags) })?;
|
|
|
|
let mut bytes_copied: libc::off_t = 0;
|
|
cvt(unsafe {
|
|
copyfile_state_get(
|
|
state.0,
|
|
COPYFILE_STATE_COPIED,
|
|
&mut bytes_copied as *mut libc::off_t as *mut libc::c_void,
|
|
)
|
|
})?;
|
|
Ok(bytes_copied as u64)
|
|
}
|
|
|
|
pub fn chown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
|
|
run_path_with_cstr(path, |path| {
|
|
cvt(unsafe { libc::chown(path.as_ptr(), uid as libc::uid_t, gid as libc::gid_t) })
|
|
.map(|_| ())
|
|
})
|
|
}
|
|
|
|
pub fn fchown(fd: c_int, uid: u32, gid: u32) -> io::Result<()> {
|
|
cvt(unsafe { libc::fchown(fd, uid as libc::uid_t, gid as libc::gid_t) })?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn lchown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
|
|
run_path_with_cstr(path, |path| {
|
|
cvt(unsafe { libc::lchown(path.as_ptr(), uid as libc::uid_t, gid as libc::gid_t) })
|
|
.map(|_| ())
|
|
})
|
|
}
|
|
|
|
#[cfg(not(any(target_os = "fuchsia", target_os = "vxworks")))]
|
|
pub fn chroot(dir: &Path) -> io::Result<()> {
|
|
run_path_with_cstr(dir, |dir| cvt(unsafe { libc::chroot(dir.as_ptr()) }).map(|_| ()))
|
|
}
|
|
|
|
pub use remove_dir_impl::remove_dir_all;
|
|
|
|
// Fallback for REDOX, ESP-ID, Horizon, and Miri
|
|
#[cfg(any(target_os = "redox", target_os = "espidf", target_os = "horizon", miri))]
|
|
mod remove_dir_impl {
|
|
pub use crate::sys_common::fs::remove_dir_all;
|
|
}
|
|
|
|
// Modern implementation using openat(), unlinkat() and fdopendir()
|
|
#[cfg(not(any(target_os = "redox", target_os = "espidf", target_os = "horizon", miri)))]
|
|
mod remove_dir_impl {
|
|
use super::{lstat, Dir, DirEntry, InnerReadDir, ReadDir};
|
|
use crate::ffi::CStr;
|
|
use crate::io;
|
|
use crate::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd};
|
|
use crate::os::unix::prelude::{OwnedFd, RawFd};
|
|
use crate::path::{Path, PathBuf};
|
|
use crate::sync::Arc;
|
|
use crate::sys::common::small_c_string::run_path_with_cstr;
|
|
use crate::sys::{cvt, cvt_r};
|
|
|
|
#[cfg(not(all(target_os = "macos", not(target_arch = "aarch64")),))]
|
|
use libc::{fdopendir, openat, unlinkat};
|
|
#[cfg(all(target_os = "macos", not(target_arch = "aarch64")))]
|
|
use macos_weak::{fdopendir, openat, unlinkat};
|
|
|
|
#[cfg(all(target_os = "macos", not(target_arch = "aarch64")))]
|
|
mod macos_weak {
|
|
use crate::sys::weak::weak;
|
|
use libc::{c_char, c_int, DIR};
|
|
|
|
fn get_openat_fn() -> Option<unsafe extern "C" fn(c_int, *const c_char, c_int) -> c_int> {
|
|
weak!(fn openat(c_int, *const c_char, c_int) -> c_int);
|
|
openat.get()
|
|
}
|
|
|
|
pub fn has_openat() -> bool {
|
|
get_openat_fn().is_some()
|
|
}
|
|
|
|
pub unsafe fn openat(dirfd: c_int, pathname: *const c_char, flags: c_int) -> c_int {
|
|
get_openat_fn().map(|openat| openat(dirfd, pathname, flags)).unwrap_or_else(|| {
|
|
crate::sys::unix::os::set_errno(libc::ENOSYS);
|
|
-1
|
|
})
|
|
}
|
|
|
|
pub unsafe fn fdopendir(fd: c_int) -> *mut DIR {
|
|
#[cfg(all(target_os = "macos", target_arch = "x86"))]
|
|
weak!(fn fdopendir(c_int) -> *mut DIR, "fdopendir$INODE64$UNIX2003");
|
|
#[cfg(all(target_os = "macos", target_arch = "x86_64"))]
|
|
weak!(fn fdopendir(c_int) -> *mut DIR, "fdopendir$INODE64");
|
|
fdopendir.get().map(|fdopendir| fdopendir(fd)).unwrap_or_else(|| {
|
|
crate::sys::unix::os::set_errno(libc::ENOSYS);
|
|
crate::ptr::null_mut()
|
|
})
|
|
}
|
|
|
|
pub unsafe fn unlinkat(dirfd: c_int, pathname: *const c_char, flags: c_int) -> c_int {
|
|
weak!(fn unlinkat(c_int, *const c_char, c_int) -> c_int);
|
|
unlinkat.get().map(|unlinkat| unlinkat(dirfd, pathname, flags)).unwrap_or_else(|| {
|
|
crate::sys::unix::os::set_errno(libc::ENOSYS);
|
|
-1
|
|
})
|
|
}
|
|
}
|
|
|
|
pub fn openat_nofollow_dironly(parent_fd: Option<RawFd>, p: &CStr) -> io::Result<OwnedFd> {
|
|
let fd = cvt_r(|| unsafe {
|
|
openat(
|
|
parent_fd.unwrap_or(libc::AT_FDCWD),
|
|
p.as_ptr(),
|
|
libc::O_CLOEXEC | libc::O_RDONLY | libc::O_NOFOLLOW | libc::O_DIRECTORY,
|
|
)
|
|
})?;
|
|
Ok(unsafe { OwnedFd::from_raw_fd(fd) })
|
|
}
|
|
|
|
fn fdreaddir(dir_fd: OwnedFd) -> io::Result<(ReadDir, RawFd)> {
|
|
let ptr = unsafe { fdopendir(dir_fd.as_raw_fd()) };
|
|
if ptr.is_null() {
|
|
return Err(io::Error::last_os_error());
|
|
}
|
|
let dirp = Dir(ptr);
|
|
// file descriptor is automatically closed by libc::closedir() now, so give up ownership
|
|
let new_parent_fd = dir_fd.into_raw_fd();
|
|
// a valid root is not needed because we do not call any functions involving the full path
|
|
// of the DirEntrys.
|
|
let dummy_root = PathBuf::new();
|
|
Ok((
|
|
ReadDir {
|
|
inner: Arc::new(InnerReadDir { dirp, root: dummy_root }),
|
|
#[cfg(not(any(
|
|
target_os = "android",
|
|
target_os = "linux",
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "fuchsia",
|
|
target_os = "redox",
|
|
)))]
|
|
end_of_stream: false,
|
|
},
|
|
new_parent_fd,
|
|
))
|
|
}
|
|
|
|
#[cfg(any(
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "haiku",
|
|
target_os = "vxworks",
|
|
))]
|
|
fn is_dir(_ent: &DirEntry) -> Option<bool> {
|
|
None
|
|
}
|
|
|
|
#[cfg(not(any(
|
|
target_os = "solaris",
|
|
target_os = "illumos",
|
|
target_os = "haiku",
|
|
target_os = "vxworks",
|
|
)))]
|
|
fn is_dir(ent: &DirEntry) -> Option<bool> {
|
|
match ent.entry.d_type {
|
|
libc::DT_UNKNOWN => None,
|
|
libc::DT_DIR => Some(true),
|
|
_ => Some(false),
|
|
}
|
|
}
|
|
|
|
fn remove_dir_all_recursive(parent_fd: Option<RawFd>, path: &CStr) -> io::Result<()> {
|
|
// try opening as directory
|
|
let fd = match openat_nofollow_dironly(parent_fd, &path) {
|
|
Err(err) if matches!(err.raw_os_error(), Some(libc::ENOTDIR | libc::ELOOP)) => {
|
|
// not a directory - don't traverse further
|
|
// (for symlinks, older Linux kernels may return ELOOP instead of ENOTDIR)
|
|
return match parent_fd {
|
|
// unlink...
|
|
Some(parent_fd) => {
|
|
cvt(unsafe { unlinkat(parent_fd, path.as_ptr(), 0) }).map(drop)
|
|
}
|
|
// ...unless this was supposed to be the deletion root directory
|
|
None => Err(err),
|
|
};
|
|
}
|
|
result => result?,
|
|
};
|
|
|
|
// open the directory passing ownership of the fd
|
|
let (dir, fd) = fdreaddir(fd)?;
|
|
for child in dir {
|
|
let child = child?;
|
|
let child_name = child.name_cstr();
|
|
match is_dir(&child) {
|
|
Some(true) => {
|
|
remove_dir_all_recursive(Some(fd), child_name)?;
|
|
}
|
|
Some(false) => {
|
|
cvt(unsafe { unlinkat(fd, child_name.as_ptr(), 0) })?;
|
|
}
|
|
None => {
|
|
// POSIX specifies that calling unlink()/unlinkat(..., 0) on a directory can succeed
|
|
// if the process has the appropriate privileges. This however can causing orphaned
|
|
// directories requiring an fsck e.g. on Solaris and Illumos. So we try recursing
|
|
// into it first instead of trying to unlink() it.
|
|
remove_dir_all_recursive(Some(fd), child_name)?;
|
|
}
|
|
}
|
|
}
|
|
|
|
// unlink the directory after removing its contents
|
|
cvt(unsafe {
|
|
unlinkat(parent_fd.unwrap_or(libc::AT_FDCWD), path.as_ptr(), libc::AT_REMOVEDIR)
|
|
})?;
|
|
Ok(())
|
|
}
|
|
|
|
fn remove_dir_all_modern(p: &Path) -> io::Result<()> {
|
|
// We cannot just call remove_dir_all_recursive() here because that would not delete a passed
|
|
// symlink. No need to worry about races, because remove_dir_all_recursive() does not recurse
|
|
// into symlinks.
|
|
let attr = lstat(p)?;
|
|
if attr.file_type().is_symlink() {
|
|
crate::fs::remove_file(p)
|
|
} else {
|
|
run_path_with_cstr(p, |p| remove_dir_all_recursive(None, &p))
|
|
}
|
|
}
|
|
|
|
#[cfg(not(all(target_os = "macos", not(target_arch = "aarch64"))))]
|
|
pub fn remove_dir_all(p: &Path) -> io::Result<()> {
|
|
remove_dir_all_modern(p)
|
|
}
|
|
|
|
#[cfg(all(target_os = "macos", not(target_arch = "aarch64")))]
|
|
pub fn remove_dir_all(p: &Path) -> io::Result<()> {
|
|
if macos_weak::has_openat() {
|
|
// openat() is available with macOS 10.10+, just like unlinkat() and fdopendir()
|
|
remove_dir_all_modern(p)
|
|
} else {
|
|
// fall back to classic implementation
|
|
crate::sys_common::fs::remove_dir_all(p)
|
|
}
|
|
}
|
|
}
|