1#![allow(nonstandard_style)]
2#![allow(unsafe_op_in_unsafe_fn)]
3#![cfg_attr(miri, allow(unused))]
5
6#[cfg(test)]
7mod tests;
8
9#[cfg(all(target_os = "linux", target_env = "gnu"))]
10use libc::c_char;
11#[cfg(any(
12 all(target_os = "linux", not(target_env = "musl")),
13 target_os = "android",
14 target_os = "fuchsia",
15 target_os = "hurd",
16 target_os = "illumos",
17))]
18use libc::dirfd;
19#[cfg(any(target_os = "fuchsia", target_os = "illumos"))]
20use libc::fstatat as fstatat64;
21#[cfg(any(all(target_os = "linux", not(target_env = "musl")), target_os = "hurd"))]
22use libc::fstatat64;
23#[cfg(any(
24 target_os = "android",
25 target_os = "solaris",
26 target_os = "fuchsia",
27 target_os = "redox",
28 target_os = "illumos",
29 target_os = "aix",
30 target_os = "nto",
31 target_os = "vita",
32 all(target_os = "linux", target_env = "musl"),
33))]
34use libc::readdir as readdir64;
35#[cfg(not(any(
36 target_os = "android",
37 target_os = "linux",
38 target_os = "solaris",
39 target_os = "illumos",
40 target_os = "l4re",
41 target_os = "fuchsia",
42 target_os = "redox",
43 target_os = "aix",
44 target_os = "nto",
45 target_os = "vita",
46 target_os = "hurd",
47)))]
48use libc::readdir_r as readdir64_r;
49#[cfg(any(all(target_os = "linux", not(target_env = "musl")), target_os = "hurd"))]
50use libc::readdir64;
51#[cfg(target_os = "l4re")]
52use libc::readdir64_r;
53use libc::{c_int, mode_t};
54#[cfg(target_os = "android")]
55use libc::{
56 dirent as dirent64, fstat as fstat64, fstatat as fstatat64, ftruncate64, lseek64,
57 lstat as lstat64, off64_t, open as open64, stat as stat64,
58};
59#[cfg(not(any(
60 all(target_os = "linux", not(target_env = "musl")),
61 target_os = "l4re",
62 target_os = "android",
63 target_os = "hurd",
64)))]
65use libc::{
66 dirent as dirent64, fstat as fstat64, ftruncate as ftruncate64, lseek as lseek64,
67 lstat as lstat64, off_t as off64_t, open as open64, stat as stat64,
68};
69#[cfg(any(
70 all(target_os = "linux", not(target_env = "musl")),
71 target_os = "l4re",
72 target_os = "hurd"
73))]
74use libc::{dirent64, fstat64, ftruncate64, lseek64, lstat64, off64_t, open64, stat64};
75
76use crate::ffi::{CStr, OsStr, OsString};
77use crate::fmt::{self, Write as _};
78use crate::fs::TryLockError;
79use crate::io::{self, BorrowedCursor, Error, IoSlice, IoSliceMut, SeekFrom};
80use crate::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd};
81use crate::os::unix::prelude::*;
82use crate::path::{Path, PathBuf};
83use crate::sync::Arc;
84use crate::sys::common::small_c_string::run_path_with_cstr;
85use crate::sys::fd::FileDesc;
86pub use crate::sys::fs::common::exists;
87use crate::sys::time::SystemTime;
88#[cfg(all(target_os = "linux", target_env = "gnu"))]
89use crate::sys::weak::syscall;
90#[cfg(target_os = "android")]
91use crate::sys::weak::weak;
92use crate::sys::{cvt, cvt_r};
93use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
94use crate::{mem, ptr};
95
96pub struct File(FileDesc);
97
98macro_rules! cfg_has_statx {
103 ({ $($then_tt:tt)* } else { $($else_tt:tt)* }) => {
104 cfg_select! {
105 all(target_os = "linux", target_env = "gnu") => {
106 $($then_tt)*
107 }
108 _ => {
109 $($else_tt)*
110 }
111 }
112 };
113 ($($block_inner:tt)*) => {
114 #[cfg(all(target_os = "linux", target_env = "gnu"))]
115 {
116 $($block_inner)*
117 }
118 };
119}
120
121cfg_has_statx! {{
122 #[derive(Clone)]
123 pub struct FileAttr {
124 stat: stat64,
125 statx_extra_fields: Option<StatxExtraFields>,
126 }
127
128 #[derive(Clone)]
129 struct StatxExtraFields {
130 stx_mask: u32,
132 stx_btime: libc::statx_timestamp,
133 #[cfg(target_pointer_width = "32")]
135 stx_atime: libc::statx_timestamp,
136 #[cfg(target_pointer_width = "32")]
137 stx_ctime: libc::statx_timestamp,
138 #[cfg(target_pointer_width = "32")]
139 stx_mtime: libc::statx_timestamp,
140
141 }
142
143 unsafe fn try_statx(
147 fd: c_int,
148 path: *const c_char,
149 flags: i32,
150 mask: u32,
151 ) -> Option<io::Result<FileAttr>> {
152 use crate::sync::atomic::{Atomic, AtomicU8, Ordering};
153
154 #[repr(u8)]
158 enum STATX_STATE{ Unknown = 0, Present, Unavailable }
159 static STATX_SAVED_STATE: Atomic<u8> = AtomicU8::new(STATX_STATE::Unknown as u8);
160
161 syscall!(
162 fn statx(
163 fd: c_int,
164 pathname: *const c_char,
165 flags: c_int,
166 mask: libc::c_uint,
167 statxbuf: *mut libc::statx,
168 ) -> c_int;
169 );
170
171 let statx_availability = STATX_SAVED_STATE.load(Ordering::Relaxed);
172 if statx_availability == STATX_STATE::Unavailable as u8 {
173 return None;
174 }
175
176 let mut buf: libc::statx = mem::zeroed();
177 if let Err(err) = cvt(statx(fd, path, flags, mask, &mut buf)) {
178 if STATX_SAVED_STATE.load(Ordering::Relaxed) == STATX_STATE::Present as u8 {
179 return Some(Err(err));
180 }
181
182 let err2 = cvt(statx(0, ptr::null(), 0, libc::STATX_BASIC_STATS | libc::STATX_BTIME, ptr::null_mut()))
194 .err()
195 .and_then(|e| e.raw_os_error());
196 if err2 == Some(libc::EFAULT) {
197 STATX_SAVED_STATE.store(STATX_STATE::Present as u8, Ordering::Relaxed);
198 return Some(Err(err));
199 } else {
200 STATX_SAVED_STATE.store(STATX_STATE::Unavailable as u8, Ordering::Relaxed);
201 return None;
202 }
203 }
204 if statx_availability == STATX_STATE::Unknown as u8 {
205 STATX_SAVED_STATE.store(STATX_STATE::Present as u8, Ordering::Relaxed);
206 }
207
208 let mut stat: stat64 = mem::zeroed();
210 stat.st_dev = libc::makedev(buf.stx_dev_major, buf.stx_dev_minor) as _;
212 stat.st_ino = buf.stx_ino as libc::ino64_t;
213 stat.st_nlink = buf.stx_nlink as libc::nlink_t;
214 stat.st_mode = buf.stx_mode as libc::mode_t;
215 stat.st_uid = buf.stx_uid as libc::uid_t;
216 stat.st_gid = buf.stx_gid as libc::gid_t;
217 stat.st_rdev = libc::makedev(buf.stx_rdev_major, buf.stx_rdev_minor) as _;
218 stat.st_size = buf.stx_size as off64_t;
219 stat.st_blksize = buf.stx_blksize as libc::blksize_t;
220 stat.st_blocks = buf.stx_blocks as libc::blkcnt64_t;
221 stat.st_atime = buf.stx_atime.tv_sec as libc::time_t;
222 stat.st_atime_nsec = buf.stx_atime.tv_nsec as _;
224 stat.st_mtime = buf.stx_mtime.tv_sec as libc::time_t;
225 stat.st_mtime_nsec = buf.stx_mtime.tv_nsec as _;
226 stat.st_ctime = buf.stx_ctime.tv_sec as libc::time_t;
227 stat.st_ctime_nsec = buf.stx_ctime.tv_nsec as _;
228
229 let extra = StatxExtraFields {
230 stx_mask: buf.stx_mask,
231 stx_btime: buf.stx_btime,
232 #[cfg(target_pointer_width = "32")]
234 stx_atime: buf.stx_atime,
235 #[cfg(target_pointer_width = "32")]
236 stx_ctime: buf.stx_ctime,
237 #[cfg(target_pointer_width = "32")]
238 stx_mtime: buf.stx_mtime,
239 };
240
241 Some(Ok(FileAttr { stat, statx_extra_fields: Some(extra) }))
242 }
243
244} else {
245 #[derive(Clone)]
246 pub struct FileAttr {
247 stat: stat64,
248 }
249}}
250
251struct InnerReadDir {
253 dirp: Dir,
254 root: PathBuf,
255}
256
257pub struct ReadDir {
258 inner: Arc<InnerReadDir>,
259 end_of_stream: bool,
260}
261
262impl ReadDir {
263 fn new(inner: InnerReadDir) -> Self {
264 Self { inner: Arc::new(inner), end_of_stream: false }
265 }
266}
267
268struct Dir(*mut libc::DIR);
269
270unsafe impl Send for Dir {}
271unsafe impl Sync for Dir {}
272
273#[cfg(any(
274 target_os = "android",
275 target_os = "linux",
276 target_os = "solaris",
277 target_os = "illumos",
278 target_os = "fuchsia",
279 target_os = "redox",
280 target_os = "aix",
281 target_os = "nto",
282 target_os = "vita",
283 target_os = "hurd",
284))]
285pub struct DirEntry {
286 dir: Arc<InnerReadDir>,
287 entry: dirent64_min,
288 name: crate::ffi::CString,
292}
293
294#[cfg(any(
298 target_os = "android",
299 target_os = "linux",
300 target_os = "solaris",
301 target_os = "illumos",
302 target_os = "fuchsia",
303 target_os = "redox",
304 target_os = "aix",
305 target_os = "nto",
306 target_os = "vita",
307 target_os = "hurd",
308))]
309struct dirent64_min {
310 d_ino: u64,
311 #[cfg(not(any(
312 target_os = "solaris",
313 target_os = "illumos",
314 target_os = "aix",
315 target_os = "nto",
316 target_os = "vita",
317 )))]
318 d_type: u8,
319}
320
321#[cfg(not(any(
322 target_os = "android",
323 target_os = "linux",
324 target_os = "solaris",
325 target_os = "illumos",
326 target_os = "fuchsia",
327 target_os = "redox",
328 target_os = "aix",
329 target_os = "nto",
330 target_os = "vita",
331 target_os = "hurd",
332)))]
333pub struct DirEntry {
334 dir: Arc<InnerReadDir>,
335 entry: dirent64,
337}
338
339#[derive(Clone)]
340pub struct OpenOptions {
341 read: bool,
343 write: bool,
344 append: bool,
345 truncate: bool,
346 create: bool,
347 create_new: bool,
348 custom_flags: i32,
350 mode: mode_t,
351}
352
353#[derive(Clone, PartialEq, Eq)]
354pub struct FilePermissions {
355 mode: mode_t,
356}
357
358#[derive(Copy, Clone, Debug, Default)]
359pub struct FileTimes {
360 accessed: Option<SystemTime>,
361 modified: Option<SystemTime>,
362 #[cfg(target_vendor = "apple")]
363 created: Option<SystemTime>,
364}
365
366#[derive(Copy, Clone, Eq)]
367pub struct FileType {
368 mode: mode_t,
369}
370
371impl PartialEq for FileType {
372 fn eq(&self, other: &Self) -> bool {
373 self.masked() == other.masked()
374 }
375}
376
377impl core::hash::Hash for FileType {
378 fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
379 self.masked().hash(state);
380 }
381}
382
383pub struct DirBuilder {
384 mode: mode_t,
385}
386
387#[derive(Copy, Clone)]
388struct Mode(mode_t);
389
390cfg_has_statx! {{
391 impl FileAttr {
392 fn from_stat64(stat: stat64) -> Self {
393 Self { stat, statx_extra_fields: None }
394 }
395
396 #[cfg(target_pointer_width = "32")]
397 pub fn stx_mtime(&self) -> Option<&libc::statx_timestamp> {
398 if let Some(ext) = &self.statx_extra_fields {
399 if (ext.stx_mask & libc::STATX_MTIME) != 0 {
400 return Some(&ext.stx_mtime);
401 }
402 }
403 None
404 }
405
406 #[cfg(target_pointer_width = "32")]
407 pub fn stx_atime(&self) -> Option<&libc::statx_timestamp> {
408 if let Some(ext) = &self.statx_extra_fields {
409 if (ext.stx_mask & libc::STATX_ATIME) != 0 {
410 return Some(&ext.stx_atime);
411 }
412 }
413 None
414 }
415
416 #[cfg(target_pointer_width = "32")]
417 pub fn stx_ctime(&self) -> Option<&libc::statx_timestamp> {
418 if let Some(ext) = &self.statx_extra_fields {
419 if (ext.stx_mask & libc::STATX_CTIME) != 0 {
420 return Some(&ext.stx_ctime);
421 }
422 }
423 None
424 }
425 }
426} else {
427 impl FileAttr {
428 fn from_stat64(stat: stat64) -> Self {
429 Self { stat }
430 }
431 }
432}}
433
434impl FileAttr {
435 pub fn size(&self) -> u64 {
436 self.stat.st_size as u64
437 }
438 pub fn perm(&self) -> FilePermissions {
439 FilePermissions { mode: (self.stat.st_mode as mode_t) }
440 }
441
442 pub fn file_type(&self) -> FileType {
443 FileType { mode: self.stat.st_mode as mode_t }
444 }
445}
446
447#[cfg(target_os = "netbsd")]
448impl FileAttr {
449 pub fn modified(&self) -> io::Result<SystemTime> {
450 SystemTime::new(self.stat.st_mtime as i64, self.stat.st_mtimensec as i64)
451 }
452
453 pub fn accessed(&self) -> io::Result<SystemTime> {
454 SystemTime::new(self.stat.st_atime as i64, self.stat.st_atimensec as i64)
455 }
456
457 pub fn created(&self) -> io::Result<SystemTime> {
458 SystemTime::new(self.stat.st_birthtime as i64, self.stat.st_birthtimensec as i64)
459 }
460}
461
462#[cfg(target_os = "aix")]
463impl FileAttr {
464 pub fn modified(&self) -> io::Result<SystemTime> {
465 SystemTime::new(self.stat.st_mtime.tv_sec as i64, self.stat.st_mtime.tv_nsec as i64)
466 }
467
468 pub fn accessed(&self) -> io::Result<SystemTime> {
469 SystemTime::new(self.stat.st_atime.tv_sec as i64, self.stat.st_atime.tv_nsec as i64)
470 }
471
472 pub fn created(&self) -> io::Result<SystemTime> {
473 SystemTime::new(self.stat.st_ctime.tv_sec as i64, self.stat.st_ctime.tv_nsec as i64)
474 }
475}
476
477#[cfg(not(any(target_os = "netbsd", target_os = "nto", target_os = "aix")))]
478impl FileAttr {
479 #[cfg(not(any(
480 target_os = "vxworks",
481 target_os = "espidf",
482 target_os = "horizon",
483 target_os = "vita",
484 target_os = "hurd",
485 target_os = "rtems",
486 target_os = "nuttx",
487 )))]
488 pub fn modified(&self) -> io::Result<SystemTime> {
489 #[cfg(target_pointer_width = "32")]
490 cfg_has_statx! {
491 if let Some(mtime) = self.stx_mtime() {
492 return SystemTime::new(mtime.tv_sec, mtime.tv_nsec as i64);
493 }
494 }
495
496 SystemTime::new(self.stat.st_mtime as i64, self.stat.st_mtime_nsec as i64)
497 }
498
499 #[cfg(any(
500 target_os = "vxworks",
501 target_os = "espidf",
502 target_os = "vita",
503 target_os = "rtems",
504 ))]
505 pub fn modified(&self) -> io::Result<SystemTime> {
506 SystemTime::new(self.stat.st_mtime as i64, 0)
507 }
508
509 #[cfg(any(target_os = "horizon", target_os = "hurd", target_os = "nuttx"))]
510 pub fn modified(&self) -> io::Result<SystemTime> {
511 SystemTime::new(self.stat.st_mtim.tv_sec as i64, self.stat.st_mtim.tv_nsec as i64)
512 }
513
514 #[cfg(not(any(
515 target_os = "vxworks",
516 target_os = "espidf",
517 target_os = "horizon",
518 target_os = "vita",
519 target_os = "hurd",
520 target_os = "rtems",
521 target_os = "nuttx",
522 )))]
523 pub fn accessed(&self) -> io::Result<SystemTime> {
524 #[cfg(target_pointer_width = "32")]
525 cfg_has_statx! {
526 if let Some(atime) = self.stx_atime() {
527 return SystemTime::new(atime.tv_sec, atime.tv_nsec as i64);
528 }
529 }
530
531 SystemTime::new(self.stat.st_atime as i64, self.stat.st_atime_nsec as i64)
532 }
533
534 #[cfg(any(
535 target_os = "vxworks",
536 target_os = "espidf",
537 target_os = "vita",
538 target_os = "rtems"
539 ))]
540 pub fn accessed(&self) -> io::Result<SystemTime> {
541 SystemTime::new(self.stat.st_atime as i64, 0)
542 }
543
544 #[cfg(any(target_os = "horizon", target_os = "hurd", target_os = "nuttx"))]
545 pub fn accessed(&self) -> io::Result<SystemTime> {
546 SystemTime::new(self.stat.st_atim.tv_sec as i64, self.stat.st_atim.tv_nsec as i64)
547 }
548
549 #[cfg(any(
550 target_os = "freebsd",
551 target_os = "openbsd",
552 target_vendor = "apple",
553 target_os = "cygwin",
554 ))]
555 pub fn created(&self) -> io::Result<SystemTime> {
556 SystemTime::new(self.stat.st_birthtime as i64, self.stat.st_birthtime_nsec as i64)
557 }
558
559 #[cfg(not(any(
560 target_os = "freebsd",
561 target_os = "openbsd",
562 target_os = "vita",
563 target_vendor = "apple",
564 target_os = "cygwin",
565 )))]
566 pub fn created(&self) -> io::Result<SystemTime> {
567 cfg_has_statx! {
568 if let Some(ext) = &self.statx_extra_fields {
569 return if (ext.stx_mask & libc::STATX_BTIME) != 0 {
570 SystemTime::new(ext.stx_btime.tv_sec, ext.stx_btime.tv_nsec as i64)
571 } else {
572 Err(io::const_error!(
573 io::ErrorKind::Unsupported,
574 "creation time is not available for the filesystem",
575 ))
576 };
577 }
578 }
579
580 Err(io::const_error!(
581 io::ErrorKind::Unsupported,
582 "creation time is not available on this platform currently",
583 ))
584 }
585
586 #[cfg(target_os = "vita")]
587 pub fn created(&self) -> io::Result<SystemTime> {
588 SystemTime::new(self.stat.st_ctime as i64, 0)
589 }
590}
591
592#[cfg(target_os = "nto")]
593impl FileAttr {
594 pub fn modified(&self) -> io::Result<SystemTime> {
595 SystemTime::new(self.stat.st_mtim.tv_sec, self.stat.st_mtim.tv_nsec)
596 }
597
598 pub fn accessed(&self) -> io::Result<SystemTime> {
599 SystemTime::new(self.stat.st_atim.tv_sec, self.stat.st_atim.tv_nsec)
600 }
601
602 pub fn created(&self) -> io::Result<SystemTime> {
603 SystemTime::new(self.stat.st_ctim.tv_sec, self.stat.st_ctim.tv_nsec)
604 }
605}
606
607impl AsInner<stat64> for FileAttr {
608 #[inline]
609 fn as_inner(&self) -> &stat64 {
610 &self.stat
611 }
612}
613
614impl FilePermissions {
615 pub fn readonly(&self) -> bool {
616 self.mode & 0o222 == 0
618 }
619
620 pub fn set_readonly(&mut self, readonly: bool) {
621 if readonly {
622 self.mode &= !0o222;
624 } else {
625 self.mode |= 0o222;
627 }
628 }
629 pub fn mode(&self) -> u32 {
630 self.mode as u32
631 }
632}
633
634impl FileTimes {
635 pub fn set_accessed(&mut self, t: SystemTime) {
636 self.accessed = Some(t);
637 }
638
639 pub fn set_modified(&mut self, t: SystemTime) {
640 self.modified = Some(t);
641 }
642
643 #[cfg(target_vendor = "apple")]
644 pub fn set_created(&mut self, t: SystemTime) {
645 self.created = Some(t);
646 }
647}
648
649impl FileType {
650 pub fn is_dir(&self) -> bool {
651 self.is(libc::S_IFDIR)
652 }
653 pub fn is_file(&self) -> bool {
654 self.is(libc::S_IFREG)
655 }
656 pub fn is_symlink(&self) -> bool {
657 self.is(libc::S_IFLNK)
658 }
659
660 pub fn is(&self, mode: mode_t) -> bool {
661 self.masked() == mode
662 }
663
664 fn masked(&self) -> mode_t {
665 self.mode & libc::S_IFMT
666 }
667}
668
669impl fmt::Debug for FileType {
670 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
671 let FileType { mode } = self;
672 f.debug_struct("FileType").field("mode", &Mode(*mode)).finish()
673 }
674}
675
676impl FromInner<u32> for FilePermissions {
677 fn from_inner(mode: u32) -> FilePermissions {
678 FilePermissions { mode: mode as mode_t }
679 }
680}
681
682impl fmt::Debug for FilePermissions {
683 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
684 let FilePermissions { mode } = self;
685 f.debug_struct("FilePermissions").field("mode", &Mode(*mode)).finish()
686 }
687}
688
689impl fmt::Debug for ReadDir {
690 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
691 fmt::Debug::fmt(&*self.inner.root, f)
694 }
695}
696
697impl Iterator for ReadDir {
698 type Item = io::Result<DirEntry>;
699
700 #[cfg(any(
701 target_os = "android",
702 target_os = "linux",
703 target_os = "solaris",
704 target_os = "fuchsia",
705 target_os = "redox",
706 target_os = "illumos",
707 target_os = "aix",
708 target_os = "nto",
709 target_os = "vita",
710 target_os = "hurd",
711 ))]
712 fn next(&mut self) -> Option<io::Result<DirEntry>> {
713 use crate::sys::os::{errno, set_errno};
714
715 if self.end_of_stream {
716 return None;
717 }
718
719 unsafe {
720 loop {
721 set_errno(0);
727 let entry_ptr: *const dirent64 = readdir64(self.inner.dirp.0);
728 if entry_ptr.is_null() {
729 self.end_of_stream = true;
732
733 return match errno() {
736 0 => None,
737 e => Some(Err(Error::from_raw_os_error(e))),
738 };
739 }
740
741 let name = CStr::from_ptr((&raw const (*entry_ptr).d_name).cast());
761 let name_bytes = name.to_bytes();
762 if name_bytes == b"." || name_bytes == b".." {
763 continue;
764 }
765
766 #[cfg(not(target_os = "vita"))]
770 let entry = dirent64_min {
771 d_ino: (*entry_ptr).d_ino as u64,
772 #[cfg(not(any(
773 target_os = "solaris",
774 target_os = "illumos",
775 target_os = "aix",
776 target_os = "nto",
777 )))]
778 d_type: (*entry_ptr).d_type as u8,
779 };
780
781 #[cfg(target_os = "vita")]
782 let entry = dirent64_min { d_ino: 0u64 };
783
784 return Some(Ok(DirEntry {
785 entry,
786 name: name.to_owned(),
787 dir: Arc::clone(&self.inner),
788 }));
789 }
790 }
791 }
792
793 #[cfg(not(any(
794 target_os = "android",
795 target_os = "linux",
796 target_os = "solaris",
797 target_os = "fuchsia",
798 target_os = "redox",
799 target_os = "illumos",
800 target_os = "aix",
801 target_os = "nto",
802 target_os = "vita",
803 target_os = "hurd",
804 )))]
805 fn next(&mut self) -> Option<io::Result<DirEntry>> {
806 if self.end_of_stream {
807 return None;
808 }
809
810 unsafe {
811 let mut ret = DirEntry { entry: mem::zeroed(), dir: Arc::clone(&self.inner) };
812 let mut entry_ptr = ptr::null_mut();
813 loop {
814 let err = readdir64_r(self.inner.dirp.0, &mut ret.entry, &mut entry_ptr);
815 if err != 0 {
816 if entry_ptr.is_null() {
817 self.end_of_stream = true;
822 }
823 return Some(Err(Error::from_raw_os_error(err)));
824 }
825 if entry_ptr.is_null() {
826 return None;
827 }
828 if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
829 return Some(Ok(ret));
830 }
831 }
832 }
833 }
834}
835
836#[inline]
845pub(crate) fn debug_assert_fd_is_open(fd: RawFd) {
846 use crate::sys::os::errno;
847
848 if core::ub_checks::check_library_ub() {
850 if unsafe { libc::fcntl(fd, libc::F_GETFD) } == -1 && errno() == libc::EBADF {
851 rtabort!("IO Safety violation: owned file descriptor already closed");
852 }
853 }
854}
855
856impl Drop for Dir {
857 fn drop(&mut self) {
858 #[cfg(not(any(
860 miri,
861 target_os = "redox",
862 target_os = "nto",
863 target_os = "vita",
864 target_os = "hurd",
865 target_os = "espidf",
866 target_os = "horizon",
867 target_os = "vxworks",
868 target_os = "rtems",
869 target_os = "nuttx",
870 )))]
871 {
872 let fd = unsafe { libc::dirfd(self.0) };
873 debug_assert_fd_is_open(fd);
874 }
875 let r = unsafe { libc::closedir(self.0) };
876 assert!(
877 r == 0 || crate::io::Error::last_os_error().is_interrupted(),
878 "unexpected error during closedir: {:?}",
879 crate::io::Error::last_os_error()
880 );
881 }
882}
883
884impl DirEntry {
885 pub fn path(&self) -> PathBuf {
886 self.dir.root.join(self.file_name_os_str())
887 }
888
889 pub fn file_name(&self) -> OsString {
890 self.file_name_os_str().to_os_string()
891 }
892
893 #[cfg(all(
894 any(
895 all(target_os = "linux", not(target_env = "musl")),
896 target_os = "android",
897 target_os = "fuchsia",
898 target_os = "hurd",
899 target_os = "illumos",
900 ),
901 not(miri) ))]
903 pub fn metadata(&self) -> io::Result<FileAttr> {
904 let fd = cvt(unsafe { dirfd(self.dir.dirp.0) })?;
905 let name = self.name_cstr().as_ptr();
906
907 cfg_has_statx! {
908 if let Some(ret) = unsafe { try_statx(
909 fd,
910 name,
911 libc::AT_SYMLINK_NOFOLLOW | libc::AT_STATX_SYNC_AS_STAT,
912 libc::STATX_BASIC_STATS | libc::STATX_BTIME,
913 ) } {
914 return ret;
915 }
916 }
917
918 let mut stat: stat64 = unsafe { mem::zeroed() };
919 cvt(unsafe { fstatat64(fd, name, &mut stat, libc::AT_SYMLINK_NOFOLLOW) })?;
920 Ok(FileAttr::from_stat64(stat))
921 }
922
923 #[cfg(any(
924 not(any(
925 all(target_os = "linux", not(target_env = "musl")),
926 target_os = "android",
927 target_os = "fuchsia",
928 target_os = "hurd",
929 target_os = "illumos",
930 )),
931 miri
932 ))]
933 pub fn metadata(&self) -> io::Result<FileAttr> {
934 run_path_with_cstr(&self.path(), &lstat)
935 }
936
937 #[cfg(any(
938 target_os = "solaris",
939 target_os = "illumos",
940 target_os = "haiku",
941 target_os = "vxworks",
942 target_os = "aix",
943 target_os = "nto",
944 target_os = "vita",
945 ))]
946 pub fn file_type(&self) -> io::Result<FileType> {
947 self.metadata().map(|m| m.file_type())
948 }
949
950 #[cfg(not(any(
951 target_os = "solaris",
952 target_os = "illumos",
953 target_os = "haiku",
954 target_os = "vxworks",
955 target_os = "aix",
956 target_os = "nto",
957 target_os = "vita",
958 )))]
959 pub fn file_type(&self) -> io::Result<FileType> {
960 match self.entry.d_type {
961 libc::DT_CHR => Ok(FileType { mode: libc::S_IFCHR }),
962 libc::DT_FIFO => Ok(FileType { mode: libc::S_IFIFO }),
963 libc::DT_LNK => Ok(FileType { mode: libc::S_IFLNK }),
964 libc::DT_REG => Ok(FileType { mode: libc::S_IFREG }),
965 libc::DT_SOCK => Ok(FileType { mode: libc::S_IFSOCK }),
966 libc::DT_DIR => Ok(FileType { mode: libc::S_IFDIR }),
967 libc::DT_BLK => Ok(FileType { mode: libc::S_IFBLK }),
968 _ => self.metadata().map(|m| m.file_type()),
969 }
970 }
971
972 #[cfg(any(
973 target_os = "linux",
974 target_os = "cygwin",
975 target_os = "emscripten",
976 target_os = "android",
977 target_os = "solaris",
978 target_os = "illumos",
979 target_os = "haiku",
980 target_os = "l4re",
981 target_os = "fuchsia",
982 target_os = "redox",
983 target_os = "vxworks",
984 target_os = "espidf",
985 target_os = "horizon",
986 target_os = "vita",
987 target_os = "aix",
988 target_os = "nto",
989 target_os = "hurd",
990 target_os = "rtems",
991 target_vendor = "apple",
992 ))]
993 pub fn ino(&self) -> u64 {
994 self.entry.d_ino as u64
995 }
996
997 #[cfg(any(
998 target_os = "freebsd",
999 target_os = "openbsd",
1000 target_os = "netbsd",
1001 target_os = "dragonfly"
1002 ))]
1003 pub fn ino(&self) -> u64 {
1004 self.entry.d_fileno as u64
1005 }
1006
1007 #[cfg(target_os = "nuttx")]
1008 pub fn ino(&self) -> u64 {
1009 0
1012 }
1013
1014 #[cfg(any(
1015 target_os = "netbsd",
1016 target_os = "openbsd",
1017 target_os = "freebsd",
1018 target_os = "dragonfly",
1019 target_vendor = "apple",
1020 ))]
1021 fn name_bytes(&self) -> &[u8] {
1022 use crate::slice;
1023 unsafe {
1024 slice::from_raw_parts(
1025 self.entry.d_name.as_ptr() as *const u8,
1026 self.entry.d_namlen as usize,
1027 )
1028 }
1029 }
1030 #[cfg(not(any(
1031 target_os = "netbsd",
1032 target_os = "openbsd",
1033 target_os = "freebsd",
1034 target_os = "dragonfly",
1035 target_vendor = "apple",
1036 )))]
1037 fn name_bytes(&self) -> &[u8] {
1038 self.name_cstr().to_bytes()
1039 }
1040
1041 #[cfg(not(any(
1042 target_os = "android",
1043 target_os = "linux",
1044 target_os = "solaris",
1045 target_os = "illumos",
1046 target_os = "fuchsia",
1047 target_os = "redox",
1048 target_os = "aix",
1049 target_os = "nto",
1050 target_os = "vita",
1051 target_os = "hurd",
1052 )))]
1053 fn name_cstr(&self) -> &CStr {
1054 unsafe { CStr::from_ptr(self.entry.d_name.as_ptr()) }
1055 }
1056 #[cfg(any(
1057 target_os = "android",
1058 target_os = "linux",
1059 target_os = "solaris",
1060 target_os = "illumos",
1061 target_os = "fuchsia",
1062 target_os = "redox",
1063 target_os = "aix",
1064 target_os = "nto",
1065 target_os = "vita",
1066 target_os = "hurd",
1067 ))]
1068 fn name_cstr(&self) -> &CStr {
1069 &self.name
1070 }
1071
1072 pub fn file_name_os_str(&self) -> &OsStr {
1073 OsStr::from_bytes(self.name_bytes())
1074 }
1075}
1076
1077impl OpenOptions {
1078 pub fn new() -> OpenOptions {
1079 OpenOptions {
1080 read: false,
1082 write: false,
1083 append: false,
1084 truncate: false,
1085 create: false,
1086 create_new: false,
1087 custom_flags: 0,
1089 mode: 0o666,
1090 }
1091 }
1092
1093 pub fn read(&mut self, read: bool) {
1094 self.read = read;
1095 }
1096 pub fn write(&mut self, write: bool) {
1097 self.write = write;
1098 }
1099 pub fn append(&mut self, append: bool) {
1100 self.append = append;
1101 }
1102 pub fn truncate(&mut self, truncate: bool) {
1103 self.truncate = truncate;
1104 }
1105 pub fn create(&mut self, create: bool) {
1106 self.create = create;
1107 }
1108 pub fn create_new(&mut self, create_new: bool) {
1109 self.create_new = create_new;
1110 }
1111
1112 pub fn custom_flags(&mut self, flags: i32) {
1113 self.custom_flags = flags;
1114 }
1115 pub fn mode(&mut self, mode: u32) {
1116 self.mode = mode as mode_t;
1117 }
1118
1119 fn get_access_mode(&self) -> io::Result<c_int> {
1120 match (self.read, self.write, self.append) {
1121 (true, false, false) => Ok(libc::O_RDONLY),
1122 (false, true, false) => Ok(libc::O_WRONLY),
1123 (true, true, false) => Ok(libc::O_RDWR),
1124 (false, _, true) => Ok(libc::O_WRONLY | libc::O_APPEND),
1125 (true, _, true) => Ok(libc::O_RDWR | libc::O_APPEND),
1126 (false, false, false) => Err(Error::from_raw_os_error(libc::EINVAL)),
1127 }
1128 }
1129
1130 fn get_creation_mode(&self) -> io::Result<c_int> {
1131 match (self.write, self.append) {
1132 (true, false) => {}
1133 (false, false) => {
1134 if self.truncate || self.create || self.create_new {
1135 return Err(Error::from_raw_os_error(libc::EINVAL));
1136 }
1137 }
1138 (_, true) => {
1139 if self.truncate && !self.create_new {
1140 return Err(Error::from_raw_os_error(libc::EINVAL));
1141 }
1142 }
1143 }
1144
1145 Ok(match (self.create, self.truncate, self.create_new) {
1146 (false, false, false) => 0,
1147 (true, false, false) => libc::O_CREAT,
1148 (false, true, false) => libc::O_TRUNC,
1149 (true, true, false) => libc::O_CREAT | libc::O_TRUNC,
1150 (_, _, true) => libc::O_CREAT | libc::O_EXCL,
1151 })
1152 }
1153}
1154
1155impl fmt::Debug for OpenOptions {
1156 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1157 let OpenOptions { read, write, append, truncate, create, create_new, custom_flags, mode } =
1158 self;
1159 f.debug_struct("OpenOptions")
1160 .field("read", read)
1161 .field("write", write)
1162 .field("append", append)
1163 .field("truncate", truncate)
1164 .field("create", create)
1165 .field("create_new", create_new)
1166 .field("custom_flags", custom_flags)
1167 .field("mode", &Mode(*mode))
1168 .finish()
1169 }
1170}
1171
1172impl File {
1173 pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
1174 run_path_with_cstr(path, &|path| File::open_c(path, opts))
1175 }
1176
1177 pub fn open_c(path: &CStr, opts: &OpenOptions) -> io::Result<File> {
1178 let flags = libc::O_CLOEXEC
1179 | opts.get_access_mode()?
1180 | opts.get_creation_mode()?
1181 | (opts.custom_flags as c_int & !libc::O_ACCMODE);
1182 let fd = cvt_r(|| unsafe { open64(path.as_ptr(), flags, opts.mode as c_int) })?;
1187 Ok(File(unsafe { FileDesc::from_raw_fd(fd) }))
1188 }
1189
1190 pub fn file_attr(&self) -> io::Result<FileAttr> {
1191 let fd = self.as_raw_fd();
1192
1193 cfg_has_statx! {
1194 if let Some(ret) = unsafe { try_statx(
1195 fd,
1196 c"".as_ptr() as *const c_char,
1197 libc::AT_EMPTY_PATH | libc::AT_STATX_SYNC_AS_STAT,
1198 libc::STATX_BASIC_STATS | libc::STATX_BTIME,
1199 ) } {
1200 return ret;
1201 }
1202 }
1203
1204 let mut stat: stat64 = unsafe { mem::zeroed() };
1205 cvt(unsafe { fstat64(fd, &mut stat) })?;
1206 Ok(FileAttr::from_stat64(stat))
1207 }
1208
1209 pub fn fsync(&self) -> io::Result<()> {
1210 cvt_r(|| unsafe { os_fsync(self.as_raw_fd()) })?;
1211 return Ok(());
1212
1213 #[cfg(target_vendor = "apple")]
1214 unsafe fn os_fsync(fd: c_int) -> c_int {
1215 libc::fcntl(fd, libc::F_FULLFSYNC)
1216 }
1217 #[cfg(not(target_vendor = "apple"))]
1218 unsafe fn os_fsync(fd: c_int) -> c_int {
1219 libc::fsync(fd)
1220 }
1221 }
1222
1223 pub fn datasync(&self) -> io::Result<()> {
1224 cvt_r(|| unsafe { os_datasync(self.as_raw_fd()) })?;
1225 return Ok(());
1226
1227 #[cfg(target_vendor = "apple")]
1228 unsafe fn os_datasync(fd: c_int) -> c_int {
1229 libc::fcntl(fd, libc::F_FULLFSYNC)
1230 }
1231 #[cfg(any(
1232 target_os = "freebsd",
1233 target_os = "fuchsia",
1234 target_os = "linux",
1235 target_os = "cygwin",
1236 target_os = "android",
1237 target_os = "netbsd",
1238 target_os = "openbsd",
1239 target_os = "nto",
1240 target_os = "hurd",
1241 ))]
1242 unsafe fn os_datasync(fd: c_int) -> c_int {
1243 libc::fdatasync(fd)
1244 }
1245 #[cfg(not(any(
1246 target_os = "android",
1247 target_os = "fuchsia",
1248 target_os = "freebsd",
1249 target_os = "linux",
1250 target_os = "cygwin",
1251 target_os = "netbsd",
1252 target_os = "openbsd",
1253 target_os = "nto",
1254 target_os = "hurd",
1255 target_vendor = "apple",
1256 )))]
1257 unsafe fn os_datasync(fd: c_int) -> c_int {
1258 libc::fsync(fd)
1259 }
1260 }
1261
1262 #[cfg(any(
1263 target_os = "freebsd",
1264 target_os = "fuchsia",
1265 target_os = "linux",
1266 target_os = "netbsd",
1267 target_os = "openbsd",
1268 target_vendor = "apple",
1269 ))]
1270 pub fn lock(&self) -> io::Result<()> {
1271 cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_EX) })?;
1272 return Ok(());
1273 }
1274
1275 #[cfg(not(any(
1276 target_os = "freebsd",
1277 target_os = "fuchsia",
1278 target_os = "linux",
1279 target_os = "netbsd",
1280 target_os = "openbsd",
1281 target_vendor = "apple",
1282 )))]
1283 pub fn lock(&self) -> io::Result<()> {
1284 Err(io::const_error!(io::ErrorKind::Unsupported, "lock() not supported"))
1285 }
1286
1287 #[cfg(any(
1288 target_os = "freebsd",
1289 target_os = "fuchsia",
1290 target_os = "linux",
1291 target_os = "netbsd",
1292 target_os = "openbsd",
1293 target_vendor = "apple",
1294 ))]
1295 pub fn lock_shared(&self) -> io::Result<()> {
1296 cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_SH) })?;
1297 return Ok(());
1298 }
1299
1300 #[cfg(not(any(
1301 target_os = "freebsd",
1302 target_os = "fuchsia",
1303 target_os = "linux",
1304 target_os = "netbsd",
1305 target_os = "openbsd",
1306 target_vendor = "apple",
1307 )))]
1308 pub fn lock_shared(&self) -> io::Result<()> {
1309 Err(io::const_error!(io::ErrorKind::Unsupported, "lock_shared() not supported"))
1310 }
1311
1312 #[cfg(any(
1313 target_os = "freebsd",
1314 target_os = "fuchsia",
1315 target_os = "linux",
1316 target_os = "netbsd",
1317 target_os = "openbsd",
1318 target_vendor = "apple",
1319 ))]
1320 pub fn try_lock(&self) -> Result<(), TryLockError> {
1321 let result = cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_EX | libc::LOCK_NB) });
1322 if let Err(err) = result {
1323 if err.kind() == io::ErrorKind::WouldBlock {
1324 Err(TryLockError::WouldBlock)
1325 } else {
1326 Err(TryLockError::Error(err))
1327 }
1328 } else {
1329 Ok(())
1330 }
1331 }
1332
1333 #[cfg(not(any(
1334 target_os = "freebsd",
1335 target_os = "fuchsia",
1336 target_os = "linux",
1337 target_os = "netbsd",
1338 target_os = "openbsd",
1339 target_vendor = "apple",
1340 )))]
1341 pub fn try_lock(&self) -> Result<(), TryLockError> {
1342 Err(TryLockError::Error(io::const_error!(
1343 io::ErrorKind::Unsupported,
1344 "try_lock() not supported"
1345 )))
1346 }
1347
1348 #[cfg(any(
1349 target_os = "freebsd",
1350 target_os = "fuchsia",
1351 target_os = "linux",
1352 target_os = "netbsd",
1353 target_os = "openbsd",
1354 target_vendor = "apple",
1355 ))]
1356 pub fn try_lock_shared(&self) -> Result<(), TryLockError> {
1357 let result = cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_SH | libc::LOCK_NB) });
1358 if let Err(err) = result {
1359 if err.kind() == io::ErrorKind::WouldBlock {
1360 Err(TryLockError::WouldBlock)
1361 } else {
1362 Err(TryLockError::Error(err))
1363 }
1364 } else {
1365 Ok(())
1366 }
1367 }
1368
1369 #[cfg(not(any(
1370 target_os = "freebsd",
1371 target_os = "fuchsia",
1372 target_os = "linux",
1373 target_os = "netbsd",
1374 target_os = "openbsd",
1375 target_vendor = "apple",
1376 )))]
1377 pub fn try_lock_shared(&self) -> Result<(), TryLockError> {
1378 Err(TryLockError::Error(io::const_error!(
1379 io::ErrorKind::Unsupported,
1380 "try_lock_shared() not supported"
1381 )))
1382 }
1383
1384 #[cfg(any(
1385 target_os = "freebsd",
1386 target_os = "fuchsia",
1387 target_os = "linux",
1388 target_os = "netbsd",
1389 target_os = "openbsd",
1390 target_vendor = "apple",
1391 ))]
1392 pub fn unlock(&self) -> io::Result<()> {
1393 cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_UN) })?;
1394 return Ok(());
1395 }
1396
1397 #[cfg(not(any(
1398 target_os = "freebsd",
1399 target_os = "fuchsia",
1400 target_os = "linux",
1401 target_os = "netbsd",
1402 target_os = "openbsd",
1403 target_vendor = "apple",
1404 )))]
1405 pub fn unlock(&self) -> io::Result<()> {
1406 Err(io::const_error!(io::ErrorKind::Unsupported, "unlock() not supported"))
1407 }
1408
1409 pub fn truncate(&self, size: u64) -> io::Result<()> {
1410 let size: off64_t =
1411 size.try_into().map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))?;
1412 cvt_r(|| unsafe { ftruncate64(self.as_raw_fd(), size) }).map(drop)
1413 }
1414
1415 pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
1416 self.0.read(buf)
1417 }
1418
1419 pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
1420 self.0.read_vectored(bufs)
1421 }
1422
1423 #[inline]
1424 pub fn is_read_vectored(&self) -> bool {
1425 self.0.is_read_vectored()
1426 }
1427
1428 pub fn read_at(&self, buf: &mut [u8], offset: u64) -> io::Result<usize> {
1429 self.0.read_at(buf, offset)
1430 }
1431
1432 pub fn read_buf(&self, cursor: BorrowedCursor<'_>) -> io::Result<()> {
1433 self.0.read_buf(cursor)
1434 }
1435
1436 pub fn read_vectored_at(&self, bufs: &mut [IoSliceMut<'_>], offset: u64) -> io::Result<usize> {
1437 self.0.read_vectored_at(bufs, offset)
1438 }
1439
1440 pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
1441 self.0.write(buf)
1442 }
1443
1444 pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
1445 self.0.write_vectored(bufs)
1446 }
1447
1448 #[inline]
1449 pub fn is_write_vectored(&self) -> bool {
1450 self.0.is_write_vectored()
1451 }
1452
1453 pub fn write_at(&self, buf: &[u8], offset: u64) -> io::Result<usize> {
1454 self.0.write_at(buf, offset)
1455 }
1456
1457 pub fn write_vectored_at(&self, bufs: &[IoSlice<'_>], offset: u64) -> io::Result<usize> {
1458 self.0.write_vectored_at(bufs, offset)
1459 }
1460
1461 #[inline]
1462 pub fn flush(&self) -> io::Result<()> {
1463 Ok(())
1464 }
1465
1466 pub fn seek(&self, pos: SeekFrom) -> io::Result<u64> {
1467 let (whence, pos) = match pos {
1468 SeekFrom::Start(off) => (libc::SEEK_SET, off as i64),
1471 SeekFrom::End(off) => (libc::SEEK_END, off),
1472 SeekFrom::Current(off) => (libc::SEEK_CUR, off),
1473 };
1474 let n = cvt(unsafe { lseek64(self.as_raw_fd(), pos as off64_t, whence) })?;
1475 Ok(n as u64)
1476 }
1477
1478 pub fn size(&self) -> Option<io::Result<u64>> {
1479 match self.file_attr().map(|attr| attr.size()) {
1480 Ok(0) => None,
1483 result => Some(result),
1484 }
1485 }
1486
1487 pub fn tell(&self) -> io::Result<u64> {
1488 self.seek(SeekFrom::Current(0))
1489 }
1490
1491 pub fn duplicate(&self) -> io::Result<File> {
1492 self.0.duplicate().map(File)
1493 }
1494
1495 pub fn set_permissions(&self, perm: FilePermissions) -> io::Result<()> {
1496 cvt_r(|| unsafe { libc::fchmod(self.as_raw_fd(), perm.mode) })?;
1497 Ok(())
1498 }
1499
1500 pub fn set_times(&self, times: FileTimes) -> io::Result<()> {
1501 #[cfg(not(any(
1502 target_os = "redox",
1503 target_os = "espidf",
1504 target_os = "horizon",
1505 target_os = "nuttx",
1506 )))]
1507 let to_timespec = |time: Option<SystemTime>| match time {
1508 Some(time) if let Some(ts) = time.t.to_timespec() => Ok(ts),
1509 Some(time) if time > crate::sys::time::UNIX_EPOCH => Err(io::const_error!(
1510 io::ErrorKind::InvalidInput,
1511 "timestamp is too large to set as a file time",
1512 )),
1513 Some(_) => Err(io::const_error!(
1514 io::ErrorKind::InvalidInput,
1515 "timestamp is too small to set as a file time",
1516 )),
1517 None => Ok(libc::timespec { tv_sec: 0, tv_nsec: libc::UTIME_OMIT as _ }),
1518 };
1519 cfg_select! {
1520 any(target_os = "redox", target_os = "espidf", target_os = "horizon", target_os = "nuttx") => {
1521 let _ = times;
1525 Err(io::const_error!(
1526 io::ErrorKind::Unsupported,
1527 "setting file times not supported",
1528 ))
1529 }
1530 target_vendor = "apple" => {
1531 let mut buf = [mem::MaybeUninit::<libc::timespec>::uninit(); 3];
1532 let mut num_times = 0;
1533 let mut attrlist: libc::attrlist = unsafe { mem::zeroed() };
1534 attrlist.bitmapcount = libc::ATTR_BIT_MAP_COUNT;
1535 if times.created.is_some() {
1536 buf[num_times].write(to_timespec(times.created)?);
1537 num_times += 1;
1538 attrlist.commonattr |= libc::ATTR_CMN_CRTIME;
1539 }
1540 if times.modified.is_some() {
1541 buf[num_times].write(to_timespec(times.modified)?);
1542 num_times += 1;
1543 attrlist.commonattr |= libc::ATTR_CMN_MODTIME;
1544 }
1545 if times.accessed.is_some() {
1546 buf[num_times].write(to_timespec(times.accessed)?);
1547 num_times += 1;
1548 attrlist.commonattr |= libc::ATTR_CMN_ACCTIME;
1549 }
1550 cvt(unsafe { libc::fsetattrlist(
1551 self.as_raw_fd(),
1552 (&raw const attrlist).cast::<libc::c_void>().cast_mut(),
1553 buf.as_ptr().cast::<libc::c_void>().cast_mut(),
1554 num_times * size_of::<libc::timespec>(),
1555 0
1556 ) })?;
1557 Ok(())
1558 }
1559 target_os = "android" => {
1560 let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
1561 cvt(unsafe {
1563 weak!(
1564 fn futimens(fd: c_int, times: *const libc::timespec) -> c_int;
1565 );
1566 match futimens.get() {
1567 Some(futimens) => futimens(self.as_raw_fd(), times.as_ptr()),
1568 None => return Err(io::const_error!(
1569 io::ErrorKind::Unsupported,
1570 "setting file times requires Android API level >= 19",
1571 )),
1572 }
1573 })?;
1574 Ok(())
1575 }
1576 _ => {
1577 #[cfg(all(target_os = "linux", target_env = "gnu", target_pointer_width = "32", not(target_arch = "riscv32")))]
1578 {
1579 use crate::sys::{time::__timespec64, weak::weak};
1580
1581 weak!(
1583 fn __futimens64(fd: c_int, times: *const __timespec64) -> c_int;
1584 );
1585
1586 if let Some(futimens64) = __futimens64.get() {
1587 let to_timespec = |time: Option<SystemTime>| time.map(|time| time.t.to_timespec64())
1588 .unwrap_or(__timespec64::new(0, libc::UTIME_OMIT as _));
1589 let times = [to_timespec(times.accessed), to_timespec(times.modified)];
1590 cvt(unsafe { futimens64(self.as_raw_fd(), times.as_ptr()) })?;
1591 return Ok(());
1592 }
1593 }
1594 let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
1595 cvt(unsafe { libc::futimens(self.as_raw_fd(), times.as_ptr()) })?;
1596 Ok(())
1597 }
1598 }
1599 }
1600}
1601
1602impl DirBuilder {
1603 pub fn new() -> DirBuilder {
1604 DirBuilder { mode: 0o777 }
1605 }
1606
1607 pub fn mkdir(&self, p: &Path) -> io::Result<()> {
1608 run_path_with_cstr(p, &|p| cvt(unsafe { libc::mkdir(p.as_ptr(), self.mode) }).map(|_| ()))
1609 }
1610
1611 pub fn set_mode(&mut self, mode: u32) {
1612 self.mode = mode as mode_t;
1613 }
1614}
1615
1616impl fmt::Debug for DirBuilder {
1617 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1618 let DirBuilder { mode } = self;
1619 f.debug_struct("DirBuilder").field("mode", &Mode(*mode)).finish()
1620 }
1621}
1622
1623impl AsInner<FileDesc> for File {
1624 #[inline]
1625 fn as_inner(&self) -> &FileDesc {
1626 &self.0
1627 }
1628}
1629
1630impl AsInnerMut<FileDesc> for File {
1631 #[inline]
1632 fn as_inner_mut(&mut self) -> &mut FileDesc {
1633 &mut self.0
1634 }
1635}
1636
1637impl IntoInner<FileDesc> for File {
1638 fn into_inner(self) -> FileDesc {
1639 self.0
1640 }
1641}
1642
1643impl FromInner<FileDesc> for File {
1644 fn from_inner(file_desc: FileDesc) -> Self {
1645 Self(file_desc)
1646 }
1647}
1648
1649impl AsFd for File {
1650 #[inline]
1651 fn as_fd(&self) -> BorrowedFd<'_> {
1652 self.0.as_fd()
1653 }
1654}
1655
1656impl AsRawFd for File {
1657 #[inline]
1658 fn as_raw_fd(&self) -> RawFd {
1659 self.0.as_raw_fd()
1660 }
1661}
1662
1663impl IntoRawFd for File {
1664 fn into_raw_fd(self) -> RawFd {
1665 self.0.into_raw_fd()
1666 }
1667}
1668
1669impl FromRawFd for File {
1670 unsafe fn from_raw_fd(raw_fd: RawFd) -> Self {
1671 Self(FromRawFd::from_raw_fd(raw_fd))
1672 }
1673}
1674
1675impl fmt::Debug for File {
1676 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1677 #[cfg(any(target_os = "linux", target_os = "illumos", target_os = "solaris"))]
1678 fn get_path(fd: c_int) -> Option<PathBuf> {
1679 let mut p = PathBuf::from("/proc/self/fd");
1680 p.push(&fd.to_string());
1681 run_path_with_cstr(&p, &readlink).ok()
1682 }
1683
1684 #[cfg(any(target_vendor = "apple", target_os = "netbsd"))]
1685 fn get_path(fd: c_int) -> Option<PathBuf> {
1686 let mut buf = vec![0; libc::PATH_MAX as usize];
1692 let n = unsafe { libc::fcntl(fd, libc::F_GETPATH, buf.as_ptr()) };
1693 if n == -1 {
1694 cfg_select! {
1695 target_os = "netbsd" => {
1696 let mut p = PathBuf::from("/proc/self/fd");
1698 p.push(&fd.to_string());
1699 return run_path_with_cstr(&p, &readlink).ok()
1700 }
1701 _ => {
1702 return None;
1703 }
1704 }
1705 }
1706 let l = buf.iter().position(|&c| c == 0).unwrap();
1707 buf.truncate(l as usize);
1708 buf.shrink_to_fit();
1709 Some(PathBuf::from(OsString::from_vec(buf)))
1710 }
1711
1712 #[cfg(target_os = "freebsd")]
1713 fn get_path(fd: c_int) -> Option<PathBuf> {
1714 let info = Box::<libc::kinfo_file>::new_zeroed();
1715 let mut info = unsafe { info.assume_init() };
1716 info.kf_structsize = size_of::<libc::kinfo_file>() as libc::c_int;
1717 let n = unsafe { libc::fcntl(fd, libc::F_KINFO, &mut *info) };
1718 if n == -1 {
1719 return None;
1720 }
1721 let buf = unsafe { CStr::from_ptr(info.kf_path.as_mut_ptr()).to_bytes().to_vec() };
1722 Some(PathBuf::from(OsString::from_vec(buf)))
1723 }
1724
1725 #[cfg(target_os = "vxworks")]
1726 fn get_path(fd: c_int) -> Option<PathBuf> {
1727 let mut buf = vec![0; libc::PATH_MAX as usize];
1728 let n = unsafe { libc::ioctl(fd, libc::FIOGETNAME, buf.as_ptr()) };
1729 if n == -1 {
1730 return None;
1731 }
1732 let l = buf.iter().position(|&c| c == 0).unwrap();
1733 buf.truncate(l as usize);
1734 Some(PathBuf::from(OsString::from_vec(buf)))
1735 }
1736
1737 #[cfg(not(any(
1738 target_os = "linux",
1739 target_os = "vxworks",
1740 target_os = "freebsd",
1741 target_os = "netbsd",
1742 target_os = "illumos",
1743 target_os = "solaris",
1744 target_vendor = "apple",
1745 )))]
1746 fn get_path(_fd: c_int) -> Option<PathBuf> {
1747 None
1749 }
1750
1751 fn get_mode(fd: c_int) -> Option<(bool, bool)> {
1752 let mode = unsafe { libc::fcntl(fd, libc::F_GETFL) };
1753 if mode == -1 {
1754 return None;
1755 }
1756 match mode & libc::O_ACCMODE {
1757 libc::O_RDONLY => Some((true, false)),
1758 libc::O_RDWR => Some((true, true)),
1759 libc::O_WRONLY => Some((false, true)),
1760 _ => None,
1761 }
1762 }
1763
1764 let fd = self.as_raw_fd();
1765 let mut b = f.debug_struct("File");
1766 b.field("fd", &fd);
1767 if let Some(path) = get_path(fd) {
1768 b.field("path", &path);
1769 }
1770 if let Some((read, write)) = get_mode(fd) {
1771 b.field("read", &read).field("write", &write);
1772 }
1773 b.finish()
1774 }
1775}
1776
1777impl fmt::Debug for Mode {
1787 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1788 let Self(mode) = *self;
1789 write!(f, "0o{mode:06o}")?;
1790
1791 let entry_type = match mode & libc::S_IFMT {
1792 libc::S_IFDIR => 'd',
1793 libc::S_IFBLK => 'b',
1794 libc::S_IFCHR => 'c',
1795 libc::S_IFLNK => 'l',
1796 libc::S_IFIFO => 'p',
1797 libc::S_IFREG => '-',
1798 _ => return Ok(()),
1799 };
1800
1801 f.write_str(" (")?;
1802 f.write_char(entry_type)?;
1803
1804 f.write_char(if mode & libc::S_IRUSR != 0 { 'r' } else { '-' })?;
1806 f.write_char(if mode & libc::S_IWUSR != 0 { 'w' } else { '-' })?;
1807 let owner_executable = mode & libc::S_IXUSR != 0;
1808 let setuid = mode as c_int & libc::S_ISUID as c_int != 0;
1809 f.write_char(match (owner_executable, setuid) {
1810 (true, true) => 's', (false, true) => 'S', (true, false) => 'x', (false, false) => '-',
1814 })?;
1815
1816 f.write_char(if mode & libc::S_IRGRP != 0 { 'r' } else { '-' })?;
1818 f.write_char(if mode & libc::S_IWGRP != 0 { 'w' } else { '-' })?;
1819 let group_executable = mode & libc::S_IXGRP != 0;
1820 let setgid = mode as c_int & libc::S_ISGID as c_int != 0;
1821 f.write_char(match (group_executable, setgid) {
1822 (true, true) => 's', (false, true) => 'S', (true, false) => 'x', (false, false) => '-',
1826 })?;
1827
1828 f.write_char(if mode & libc::S_IROTH != 0 { 'r' } else { '-' })?;
1830 f.write_char(if mode & libc::S_IWOTH != 0 { 'w' } else { '-' })?;
1831 let other_executable = mode & libc::S_IXOTH != 0;
1832 let sticky = mode as c_int & libc::S_ISVTX as c_int != 0;
1833 f.write_char(match (entry_type, other_executable, sticky) {
1834 ('d', true, true) => 't', ('d', false, true) => 'T', (_, true, _) => 'x', (_, false, _) => '-',
1838 })?;
1839
1840 f.write_char(')')
1841 }
1842}
1843
1844pub fn readdir(path: &Path) -> io::Result<ReadDir> {
1845 let ptr = run_path_with_cstr(path, &|p| unsafe { Ok(libc::opendir(p.as_ptr())) })?;
1846 if ptr.is_null() {
1847 Err(Error::last_os_error())
1848 } else {
1849 let root = path.to_path_buf();
1850 let inner = InnerReadDir { dirp: Dir(ptr), root };
1851 Ok(ReadDir::new(inner))
1852 }
1853}
1854
1855pub fn unlink(p: &CStr) -> io::Result<()> {
1856 cvt(unsafe { libc::unlink(p.as_ptr()) }).map(|_| ())
1857}
1858
1859pub fn rename(old: &CStr, new: &CStr) -> io::Result<()> {
1860 cvt(unsafe { libc::rename(old.as_ptr(), new.as_ptr()) }).map(|_| ())
1861}
1862
1863pub fn set_perm(p: &CStr, perm: FilePermissions) -> io::Result<()> {
1864 cvt_r(|| unsafe { libc::chmod(p.as_ptr(), perm.mode) }).map(|_| ())
1865}
1866
1867pub fn rmdir(p: &CStr) -> io::Result<()> {
1868 cvt(unsafe { libc::rmdir(p.as_ptr()) }).map(|_| ())
1869}
1870
1871pub fn readlink(c_path: &CStr) -> io::Result<PathBuf> {
1872 let p = c_path.as_ptr();
1873
1874 let mut buf = Vec::with_capacity(256);
1875
1876 loop {
1877 let buf_read =
1878 cvt(unsafe { libc::readlink(p, buf.as_mut_ptr() as *mut _, buf.capacity()) })? as usize;
1879
1880 unsafe {
1881 buf.set_len(buf_read);
1882 }
1883
1884 if buf_read != buf.capacity() {
1885 buf.shrink_to_fit();
1886
1887 return Ok(PathBuf::from(OsString::from_vec(buf)));
1888 }
1889
1890 buf.reserve(1);
1894 }
1895}
1896
1897pub fn symlink(original: &CStr, link: &CStr) -> io::Result<()> {
1898 cvt(unsafe { libc::symlink(original.as_ptr(), link.as_ptr()) }).map(|_| ())
1899}
1900
1901pub fn link(original: &CStr, link: &CStr) -> io::Result<()> {
1902 cfg_select! {
1903 any(target_os = "vxworks", target_os = "redox", target_os = "android", target_os = "espidf", target_os = "horizon", target_os = "vita", target_env = "nto70") => {
1904 cvt(unsafe { libc::link(original.as_ptr(), link.as_ptr()) })?;
1910 }
1911 _ => {
1912 cvt(unsafe { libc::linkat(libc::AT_FDCWD, original.as_ptr(), libc::AT_FDCWD, link.as_ptr(), 0) })?;
1915 }
1916 }
1917 Ok(())
1918}
1919
1920pub fn stat(p: &CStr) -> io::Result<FileAttr> {
1921 cfg_has_statx! {
1922 if let Some(ret) = unsafe { try_statx(
1923 libc::AT_FDCWD,
1924 p.as_ptr(),
1925 libc::AT_STATX_SYNC_AS_STAT,
1926 libc::STATX_BASIC_STATS | libc::STATX_BTIME,
1927 ) } {
1928 return ret;
1929 }
1930 }
1931
1932 let mut stat: stat64 = unsafe { mem::zeroed() };
1933 cvt(unsafe { stat64(p.as_ptr(), &mut stat) })?;
1934 Ok(FileAttr::from_stat64(stat))
1935}
1936
1937pub fn lstat(p: &CStr) -> io::Result<FileAttr> {
1938 cfg_has_statx! {
1939 if let Some(ret) = unsafe { try_statx(
1940 libc::AT_FDCWD,
1941 p.as_ptr(),
1942 libc::AT_SYMLINK_NOFOLLOW | libc::AT_STATX_SYNC_AS_STAT,
1943 libc::STATX_BASIC_STATS | libc::STATX_BTIME,
1944 ) } {
1945 return ret;
1946 }
1947 }
1948
1949 let mut stat: stat64 = unsafe { mem::zeroed() };
1950 cvt(unsafe { lstat64(p.as_ptr(), &mut stat) })?;
1951 Ok(FileAttr::from_stat64(stat))
1952}
1953
1954pub fn canonicalize(path: &CStr) -> io::Result<PathBuf> {
1955 let r = unsafe { libc::realpath(path.as_ptr(), ptr::null_mut()) };
1956 if r.is_null() {
1957 return Err(io::Error::last_os_error());
1958 }
1959 Ok(PathBuf::from(OsString::from_vec(unsafe {
1960 let buf = CStr::from_ptr(r).to_bytes().to_vec();
1961 libc::free(r as *mut _);
1962 buf
1963 })))
1964}
1965
1966fn open_from(from: &Path) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
1967 use crate::fs::File;
1968 use crate::sys::fs::common::NOT_FILE_ERROR;
1969
1970 let reader = File::open(from)?;
1971 let metadata = reader.metadata()?;
1972 if !metadata.is_file() {
1973 return Err(NOT_FILE_ERROR);
1974 }
1975 Ok((reader, metadata))
1976}
1977
1978#[cfg(target_os = "espidf")]
1979fn open_to_and_set_permissions(
1980 to: &Path,
1981 _reader_metadata: &crate::fs::Metadata,
1982) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
1983 use crate::fs::OpenOptions;
1984 let writer = OpenOptions::new().open(to)?;
1985 let writer_metadata = writer.metadata()?;
1986 Ok((writer, writer_metadata))
1987}
1988
1989#[cfg(not(target_os = "espidf"))]
1990fn open_to_and_set_permissions(
1991 to: &Path,
1992 reader_metadata: &crate::fs::Metadata,
1993) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
1994 use crate::fs::OpenOptions;
1995 use crate::os::unix::fs::{OpenOptionsExt, PermissionsExt};
1996
1997 let perm = reader_metadata.permissions();
1998 let writer = OpenOptions::new()
1999 .mode(perm.mode())
2001 .write(true)
2002 .create(true)
2003 .truncate(true)
2004 .open(to)?;
2005 let writer_metadata = writer.metadata()?;
2006 #[cfg(not(target_os = "vita"))]
2008 if writer_metadata.is_file() {
2009 writer.set_permissions(perm)?;
2013 }
2014 Ok((writer, writer_metadata))
2015}
2016
2017mod cfm {
2018 use crate::fs::{File, Metadata};
2019 use crate::io::{BorrowedCursor, IoSlice, IoSliceMut, Read, Result, Write};
2020
2021 #[allow(dead_code)]
2022 pub struct CachedFileMetadata(pub File, pub Metadata);
2023
2024 impl Read for CachedFileMetadata {
2025 fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
2026 self.0.read(buf)
2027 }
2028 fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize> {
2029 self.0.read_vectored(bufs)
2030 }
2031 fn read_buf(&mut self, cursor: BorrowedCursor<'_>) -> Result<()> {
2032 self.0.read_buf(cursor)
2033 }
2034 #[inline]
2035 fn is_read_vectored(&self) -> bool {
2036 self.0.is_read_vectored()
2037 }
2038 fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize> {
2039 self.0.read_to_end(buf)
2040 }
2041 fn read_to_string(&mut self, buf: &mut String) -> Result<usize> {
2042 self.0.read_to_string(buf)
2043 }
2044 }
2045 impl Write for CachedFileMetadata {
2046 fn write(&mut self, buf: &[u8]) -> Result<usize> {
2047 self.0.write(buf)
2048 }
2049 fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize> {
2050 self.0.write_vectored(bufs)
2051 }
2052 #[inline]
2053 fn is_write_vectored(&self) -> bool {
2054 self.0.is_write_vectored()
2055 }
2056 #[inline]
2057 fn flush(&mut self) -> Result<()> {
2058 self.0.flush()
2059 }
2060 }
2061}
2062#[cfg(any(target_os = "linux", target_os = "android"))]
2063pub(crate) use cfm::CachedFileMetadata;
2064
2065#[cfg(not(target_vendor = "apple"))]
2066pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
2067 let (reader, reader_metadata) = open_from(from)?;
2068 let (writer, writer_metadata) = open_to_and_set_permissions(to, &reader_metadata)?;
2069
2070 io::copy(
2071 &mut cfm::CachedFileMetadata(reader, reader_metadata),
2072 &mut cfm::CachedFileMetadata(writer, writer_metadata),
2073 )
2074}
2075
2076#[cfg(target_vendor = "apple")]
2077pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
2078 const COPYFILE_ALL: libc::copyfile_flags_t = libc::COPYFILE_METADATA | libc::COPYFILE_DATA;
2079
2080 struct FreeOnDrop(libc::copyfile_state_t);
2081 impl Drop for FreeOnDrop {
2082 fn drop(&mut self) {
2083 unsafe {
2085 libc::copyfile_state_free(self.0);
2088 }
2089 }
2090 }
2091
2092 let (reader, reader_metadata) = open_from(from)?;
2093
2094 let clonefile_result = run_path_with_cstr(to, &|to| {
2095 cvt(unsafe { libc::fclonefileat(reader.as_raw_fd(), libc::AT_FDCWD, to.as_ptr(), 0) })
2096 });
2097 match clonefile_result {
2098 Ok(_) => return Ok(reader_metadata.len()),
2099 Err(e) => match e.raw_os_error() {
2100 Some(libc::ENOTSUP) | Some(libc::EEXIST) | Some(libc::EXDEV) => (),
2105 _ => return Err(e),
2106 },
2107 }
2108
2109 let (writer, writer_metadata) = open_to_and_set_permissions(to, &reader_metadata)?;
2111
2112 let state = unsafe {
2115 let state = libc::copyfile_state_alloc();
2116 if state.is_null() {
2117 return Err(crate::io::Error::last_os_error());
2118 }
2119 FreeOnDrop(state)
2120 };
2121
2122 let flags = if writer_metadata.is_file() { COPYFILE_ALL } else { libc::COPYFILE_DATA };
2123
2124 cvt(unsafe { libc::fcopyfile(reader.as_raw_fd(), writer.as_raw_fd(), state.0, flags) })?;
2125
2126 let mut bytes_copied: libc::off_t = 0;
2127 cvt(unsafe {
2128 libc::copyfile_state_get(
2129 state.0,
2130 libc::COPYFILE_STATE_COPIED as u32,
2131 (&raw mut bytes_copied) as *mut libc::c_void,
2132 )
2133 })?;
2134 Ok(bytes_copied as u64)
2135}
2136
2137pub fn chown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
2138 run_path_with_cstr(path, &|path| {
2139 cvt(unsafe { libc::chown(path.as_ptr(), uid as libc::uid_t, gid as libc::gid_t) })
2140 .map(|_| ())
2141 })
2142}
2143
2144pub fn fchown(fd: c_int, uid: u32, gid: u32) -> io::Result<()> {
2145 cvt(unsafe { libc::fchown(fd, uid as libc::uid_t, gid as libc::gid_t) })?;
2146 Ok(())
2147}
2148
2149#[cfg(not(target_os = "vxworks"))]
2150pub fn lchown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
2151 run_path_with_cstr(path, &|path| {
2152 cvt(unsafe { libc::lchown(path.as_ptr(), uid as libc::uid_t, gid as libc::gid_t) })
2153 .map(|_| ())
2154 })
2155}
2156
2157#[cfg(target_os = "vxworks")]
2158pub fn lchown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
2159 let (_, _, _) = (path, uid, gid);
2160 Err(io::const_error!(io::ErrorKind::Unsupported, "lchown not supported by vxworks"))
2161}
2162
2163#[cfg(not(any(target_os = "fuchsia", target_os = "vxworks")))]
2164pub fn chroot(dir: &Path) -> io::Result<()> {
2165 run_path_with_cstr(dir, &|dir| cvt(unsafe { libc::chroot(dir.as_ptr()) }).map(|_| ()))
2166}
2167
2168#[cfg(target_os = "vxworks")]
2169pub fn chroot(dir: &Path) -> io::Result<()> {
2170 let _ = dir;
2171 Err(io::const_error!(io::ErrorKind::Unsupported, "chroot not supported by vxworks"))
2172}
2173
2174pub fn mkfifo(path: &Path, mode: u32) -> io::Result<()> {
2175 run_path_with_cstr(path, &|path| {
2176 cvt(unsafe { libc::mkfifo(path.as_ptr(), mode.try_into().unwrap()) }).map(|_| ())
2177 })
2178}
2179
2180pub use remove_dir_impl::remove_dir_all;
2181
2182#[cfg(any(
2184 target_os = "redox",
2185 target_os = "espidf",
2186 target_os = "horizon",
2187 target_os = "vita",
2188 target_os = "nto",
2189 target_os = "vxworks",
2190 miri
2191))]
2192mod remove_dir_impl {
2193 pub use crate::sys::fs::common::remove_dir_all;
2194}
2195
2196#[cfg(not(any(
2198 target_os = "redox",
2199 target_os = "espidf",
2200 target_os = "horizon",
2201 target_os = "vita",
2202 target_os = "nto",
2203 target_os = "vxworks",
2204 miri
2205)))]
2206mod remove_dir_impl {
2207 #[cfg(not(all(target_os = "linux", target_env = "gnu")))]
2208 use libc::{fdopendir, openat, unlinkat};
2209 #[cfg(all(target_os = "linux", target_env = "gnu"))]
2210 use libc::{fdopendir, openat64 as openat, unlinkat};
2211
2212 use super::{Dir, DirEntry, InnerReadDir, ReadDir, lstat};
2213 use crate::ffi::CStr;
2214 use crate::io;
2215 use crate::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd};
2216 use crate::os::unix::prelude::{OwnedFd, RawFd};
2217 use crate::path::{Path, PathBuf};
2218 use crate::sys::common::small_c_string::run_path_with_cstr;
2219 use crate::sys::{cvt, cvt_r};
2220 use crate::sys_common::ignore_notfound;
2221
2222 pub fn openat_nofollow_dironly(parent_fd: Option<RawFd>, p: &CStr) -> io::Result<OwnedFd> {
2223 let fd = cvt_r(|| unsafe {
2224 openat(
2225 parent_fd.unwrap_or(libc::AT_FDCWD),
2226 p.as_ptr(),
2227 libc::O_CLOEXEC | libc::O_RDONLY | libc::O_NOFOLLOW | libc::O_DIRECTORY,
2228 )
2229 })?;
2230 Ok(unsafe { OwnedFd::from_raw_fd(fd) })
2231 }
2232
2233 fn fdreaddir(dir_fd: OwnedFd) -> io::Result<(ReadDir, RawFd)> {
2234 let ptr = unsafe { fdopendir(dir_fd.as_raw_fd()) };
2235 if ptr.is_null() {
2236 return Err(io::Error::last_os_error());
2237 }
2238 let dirp = Dir(ptr);
2239 let new_parent_fd = dir_fd.into_raw_fd();
2241 let dummy_root = PathBuf::new();
2244 let inner = InnerReadDir { dirp, root: dummy_root };
2245 Ok((ReadDir::new(inner), new_parent_fd))
2246 }
2247
2248 #[cfg(any(
2249 target_os = "solaris",
2250 target_os = "illumos",
2251 target_os = "haiku",
2252 target_os = "vxworks",
2253 target_os = "aix",
2254 ))]
2255 fn is_dir(_ent: &DirEntry) -> Option<bool> {
2256 None
2257 }
2258
2259 #[cfg(not(any(
2260 target_os = "solaris",
2261 target_os = "illumos",
2262 target_os = "haiku",
2263 target_os = "vxworks",
2264 target_os = "aix",
2265 )))]
2266 fn is_dir(ent: &DirEntry) -> Option<bool> {
2267 match ent.entry.d_type {
2268 libc::DT_UNKNOWN => None,
2269 libc::DT_DIR => Some(true),
2270 _ => Some(false),
2271 }
2272 }
2273
2274 fn is_enoent(result: &io::Result<()>) -> bool {
2275 if let Err(err) = result
2276 && matches!(err.raw_os_error(), Some(libc::ENOENT))
2277 {
2278 true
2279 } else {
2280 false
2281 }
2282 }
2283
2284 fn remove_dir_all_recursive(parent_fd: Option<RawFd>, path: &CStr) -> io::Result<()> {
2285 let fd = match openat_nofollow_dironly(parent_fd, &path) {
2287 Err(err) if matches!(err.raw_os_error(), Some(libc::ENOTDIR | libc::ELOOP)) => {
2288 return match parent_fd {
2291 Some(parent_fd) => {
2293 cvt(unsafe { unlinkat(parent_fd, path.as_ptr(), 0) }).map(drop)
2294 }
2295 None => Err(err),
2297 };
2298 }
2299 result => result?,
2300 };
2301
2302 let (dir, fd) = fdreaddir(fd)?;
2304 for child in dir {
2305 let child = child?;
2306 let child_name = child.name_cstr();
2307 let result: io::Result<()> = try {
2311 match is_dir(&child) {
2312 Some(true) => {
2313 remove_dir_all_recursive(Some(fd), child_name)?;
2314 }
2315 Some(false) => {
2316 cvt(unsafe { unlinkat(fd, child_name.as_ptr(), 0) })?;
2317 }
2318 None => {
2319 remove_dir_all_recursive(Some(fd), child_name)?;
2324 }
2325 }
2326 };
2327 if result.is_err() && !is_enoent(&result) {
2328 return result;
2329 }
2330 }
2331
2332 ignore_notfound(cvt(unsafe {
2334 unlinkat(parent_fd.unwrap_or(libc::AT_FDCWD), path.as_ptr(), libc::AT_REMOVEDIR)
2335 }))?;
2336 Ok(())
2337 }
2338
2339 fn remove_dir_all_modern(p: &CStr) -> io::Result<()> {
2340 let attr = lstat(p)?;
2344 if attr.file_type().is_symlink() {
2345 super::unlink(p)
2346 } else {
2347 remove_dir_all_recursive(None, &p)
2348 }
2349 }
2350
2351 pub fn remove_dir_all(p: &Path) -> io::Result<()> {
2352 run_path_with_cstr(p, &remove_dir_all_modern)
2353 }
2354}