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))]
17use libc::dirfd;
18#[cfg(target_os = "fuchsia")]
19use libc::fstatat as fstatat64;
20#[cfg(any(all(target_os = "linux", not(target_env = "musl")), target_os = "hurd"))]
21use libc::fstatat64;
22#[cfg(any(
23 target_os = "android",
24 target_os = "solaris",
25 target_os = "fuchsia",
26 target_os = "redox",
27 target_os = "illumos",
28 target_os = "aix",
29 target_os = "nto",
30 target_os = "vita",
31 all(target_os = "linux", target_env = "musl"),
32))]
33use libc::readdir as readdir64;
34#[cfg(not(any(
35 target_os = "android",
36 target_os = "linux",
37 target_os = "solaris",
38 target_os = "illumos",
39 target_os = "l4re",
40 target_os = "fuchsia",
41 target_os = "redox",
42 target_os = "aix",
43 target_os = "nto",
44 target_os = "vita",
45 target_os = "hurd",
46)))]
47use libc::readdir_r as readdir64_r;
48#[cfg(any(all(target_os = "linux", not(target_env = "musl")), target_os = "hurd"))]
49use libc::readdir64;
50#[cfg(target_os = "l4re")]
51use libc::readdir64_r;
52use libc::{c_int, mode_t};
53#[cfg(target_os = "android")]
54use libc::{
55 dirent as dirent64, fstat as fstat64, fstatat as fstatat64, ftruncate64, lseek64,
56 lstat as lstat64, off64_t, open as open64, stat as stat64,
57};
58#[cfg(not(any(
59 all(target_os = "linux", not(target_env = "musl")),
60 target_os = "l4re",
61 target_os = "android",
62 target_os = "hurd",
63)))]
64use libc::{
65 dirent as dirent64, fstat as fstat64, ftruncate as ftruncate64, lseek as lseek64,
66 lstat as lstat64, off_t as off64_t, open as open64, stat as stat64,
67};
68#[cfg(any(
69 all(target_os = "linux", not(target_env = "musl")),
70 target_os = "l4re",
71 target_os = "hurd"
72))]
73use libc::{dirent64, fstat64, ftruncate64, lseek64, lstat64, off64_t, open64, stat64};
74
75use crate::ffi::{CStr, OsStr, OsString};
76use crate::fmt::{self, Write as _};
77use crate::io::{self, BorrowedCursor, Error, IoSlice, IoSliceMut, SeekFrom};
78use crate::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd};
79use crate::os::unix::prelude::*;
80use crate::path::{Path, PathBuf};
81use crate::sync::Arc;
82use crate::sys::common::small_c_string::run_path_with_cstr;
83use crate::sys::fd::FileDesc;
84pub use crate::sys::fs::common::exists;
85use crate::sys::time::SystemTime;
86#[cfg(all(target_os = "linux", target_env = "gnu"))]
87use crate::sys::weak::syscall;
88#[cfg(target_os = "android")]
89use crate::sys::weak::weak;
90use crate::sys::{cvt, cvt_r};
91use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
92use crate::{mem, ptr};
93
94pub struct File(FileDesc);
95
96macro_rules! cfg_has_statx {
101 ({ $($then_tt:tt)* } else { $($else_tt:tt)* }) => {
102 cfg_if::cfg_if! {
103 if #[cfg(all(target_os = "linux", target_env = "gnu"))] {
104 $($then_tt)*
105 } else {
106 $($else_tt)*
107 }
108 }
109 };
110 ($($block_inner:tt)*) => {
111 #[cfg(all(target_os = "linux", target_env = "gnu"))]
112 {
113 $($block_inner)*
114 }
115 };
116}
117
118cfg_has_statx! {{
119 #[derive(Clone)]
120 pub struct FileAttr {
121 stat: stat64,
122 statx_extra_fields: Option<StatxExtraFields>,
123 }
124
125 #[derive(Clone)]
126 struct StatxExtraFields {
127 stx_mask: u32,
129 stx_btime: libc::statx_timestamp,
130 #[cfg(target_pointer_width = "32")]
132 stx_atime: libc::statx_timestamp,
133 #[cfg(target_pointer_width = "32")]
134 stx_ctime: libc::statx_timestamp,
135 #[cfg(target_pointer_width = "32")]
136 stx_mtime: libc::statx_timestamp,
137
138 }
139
140 unsafe fn try_statx(
144 fd: c_int,
145 path: *const c_char,
146 flags: i32,
147 mask: u32,
148 ) -> Option<io::Result<FileAttr>> {
149 use crate::sync::atomic::{AtomicU8, Ordering};
150
151 #[repr(u8)]
155 enum STATX_STATE{ Unknown = 0, Present, Unavailable }
156 static STATX_SAVED_STATE: AtomicU8 = AtomicU8::new(STATX_STATE::Unknown as u8);
157
158 syscall! {
159 fn statx(
160 fd: c_int,
161 pathname: *const c_char,
162 flags: c_int,
163 mask: libc::c_uint,
164 statxbuf: *mut libc::statx
165 ) -> c_int
166 }
167
168 let statx_availability = STATX_SAVED_STATE.load(Ordering::Relaxed);
169 if statx_availability == STATX_STATE::Unavailable as u8 {
170 return None;
171 }
172
173 let mut buf: libc::statx = mem::zeroed();
174 if let Err(err) = cvt(statx(fd, path, flags, mask, &mut buf)) {
175 if STATX_SAVED_STATE.load(Ordering::Relaxed) == STATX_STATE::Present as u8 {
176 return Some(Err(err));
177 }
178
179 let err2 = cvt(statx(0, ptr::null(), 0, libc::STATX_BASIC_STATS | libc::STATX_BTIME, ptr::null_mut()))
191 .err()
192 .and_then(|e| e.raw_os_error());
193 if err2 == Some(libc::EFAULT) {
194 STATX_SAVED_STATE.store(STATX_STATE::Present as u8, Ordering::Relaxed);
195 return Some(Err(err));
196 } else {
197 STATX_SAVED_STATE.store(STATX_STATE::Unavailable as u8, Ordering::Relaxed);
198 return None;
199 }
200 }
201 if statx_availability == STATX_STATE::Unknown as u8 {
202 STATX_SAVED_STATE.store(STATX_STATE::Present as u8, Ordering::Relaxed);
203 }
204
205 let mut stat: stat64 = mem::zeroed();
207 stat.st_dev = libc::makedev(buf.stx_dev_major, buf.stx_dev_minor) as _;
209 stat.st_ino = buf.stx_ino as libc::ino64_t;
210 stat.st_nlink = buf.stx_nlink as libc::nlink_t;
211 stat.st_mode = buf.stx_mode as libc::mode_t;
212 stat.st_uid = buf.stx_uid as libc::uid_t;
213 stat.st_gid = buf.stx_gid as libc::gid_t;
214 stat.st_rdev = libc::makedev(buf.stx_rdev_major, buf.stx_rdev_minor) as _;
215 stat.st_size = buf.stx_size as off64_t;
216 stat.st_blksize = buf.stx_blksize as libc::blksize_t;
217 stat.st_blocks = buf.stx_blocks as libc::blkcnt64_t;
218 stat.st_atime = buf.stx_atime.tv_sec as libc::time_t;
219 stat.st_atime_nsec = buf.stx_atime.tv_nsec as _;
221 stat.st_mtime = buf.stx_mtime.tv_sec as libc::time_t;
222 stat.st_mtime_nsec = buf.stx_mtime.tv_nsec as _;
223 stat.st_ctime = buf.stx_ctime.tv_sec as libc::time_t;
224 stat.st_ctime_nsec = buf.stx_ctime.tv_nsec as _;
225
226 let extra = StatxExtraFields {
227 stx_mask: buf.stx_mask,
228 stx_btime: buf.stx_btime,
229 #[cfg(target_pointer_width = "32")]
231 stx_atime: buf.stx_atime,
232 #[cfg(target_pointer_width = "32")]
233 stx_ctime: buf.stx_ctime,
234 #[cfg(target_pointer_width = "32")]
235 stx_mtime: buf.stx_mtime,
236 };
237
238 Some(Ok(FileAttr { stat, statx_extra_fields: Some(extra) }))
239 }
240
241} else {
242 #[derive(Clone)]
243 pub struct FileAttr {
244 stat: stat64,
245 }
246}}
247
248struct InnerReadDir {
250 dirp: Dir,
251 root: PathBuf,
252}
253
254pub struct ReadDir {
255 inner: Arc<InnerReadDir>,
256 end_of_stream: bool,
257}
258
259impl ReadDir {
260 fn new(inner: InnerReadDir) -> Self {
261 Self { inner: Arc::new(inner), end_of_stream: false }
262 }
263}
264
265struct Dir(*mut libc::DIR);
266
267unsafe impl Send for Dir {}
268unsafe impl Sync for Dir {}
269
270#[cfg(any(
271 target_os = "android",
272 target_os = "linux",
273 target_os = "solaris",
274 target_os = "illumos",
275 target_os = "fuchsia",
276 target_os = "redox",
277 target_os = "aix",
278 target_os = "nto",
279 target_os = "vita",
280 target_os = "hurd",
281))]
282pub struct DirEntry {
283 dir: Arc<InnerReadDir>,
284 entry: dirent64_min,
285 name: crate::ffi::CString,
289}
290
291#[cfg(any(
295 target_os = "android",
296 target_os = "linux",
297 target_os = "solaris",
298 target_os = "illumos",
299 target_os = "fuchsia",
300 target_os = "redox",
301 target_os = "aix",
302 target_os = "nto",
303 target_os = "vita",
304 target_os = "hurd",
305))]
306struct dirent64_min {
307 d_ino: u64,
308 #[cfg(not(any(
309 target_os = "solaris",
310 target_os = "illumos",
311 target_os = "aix",
312 target_os = "nto",
313 target_os = "vita",
314 )))]
315 d_type: u8,
316}
317
318#[cfg(not(any(
319 target_os = "android",
320 target_os = "linux",
321 target_os = "solaris",
322 target_os = "illumos",
323 target_os = "fuchsia",
324 target_os = "redox",
325 target_os = "aix",
326 target_os = "nto",
327 target_os = "vita",
328 target_os = "hurd",
329)))]
330pub struct DirEntry {
331 dir: Arc<InnerReadDir>,
332 entry: dirent64,
334}
335
336#[derive(Clone)]
337pub struct OpenOptions {
338 read: bool,
340 write: bool,
341 append: bool,
342 truncate: bool,
343 create: bool,
344 create_new: bool,
345 custom_flags: i32,
347 mode: mode_t,
348}
349
350#[derive(Clone, PartialEq, Eq)]
351pub struct FilePermissions {
352 mode: mode_t,
353}
354
355#[derive(Copy, Clone, Debug, Default)]
356pub struct FileTimes {
357 accessed: Option<SystemTime>,
358 modified: Option<SystemTime>,
359 #[cfg(target_vendor = "apple")]
360 created: Option<SystemTime>,
361}
362
363#[derive(Copy, Clone, Eq)]
364pub struct FileType {
365 mode: mode_t,
366}
367
368impl PartialEq for FileType {
369 fn eq(&self, other: &Self) -> bool {
370 self.masked() == other.masked()
371 }
372}
373
374impl core::hash::Hash for FileType {
375 fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
376 self.masked().hash(state);
377 }
378}
379
380pub struct DirBuilder {
381 mode: mode_t,
382}
383
384#[derive(Copy, Clone)]
385struct Mode(mode_t);
386
387cfg_has_statx! {{
388 impl FileAttr {
389 fn from_stat64(stat: stat64) -> Self {
390 Self { stat, statx_extra_fields: None }
391 }
392
393 #[cfg(target_pointer_width = "32")]
394 pub fn stx_mtime(&self) -> Option<&libc::statx_timestamp> {
395 if let Some(ext) = &self.statx_extra_fields {
396 if (ext.stx_mask & libc::STATX_MTIME) != 0 {
397 return Some(&ext.stx_mtime);
398 }
399 }
400 None
401 }
402
403 #[cfg(target_pointer_width = "32")]
404 pub fn stx_atime(&self) -> Option<&libc::statx_timestamp> {
405 if let Some(ext) = &self.statx_extra_fields {
406 if (ext.stx_mask & libc::STATX_ATIME) != 0 {
407 return Some(&ext.stx_atime);
408 }
409 }
410 None
411 }
412
413 #[cfg(target_pointer_width = "32")]
414 pub fn stx_ctime(&self) -> Option<&libc::statx_timestamp> {
415 if let Some(ext) = &self.statx_extra_fields {
416 if (ext.stx_mask & libc::STATX_CTIME) != 0 {
417 return Some(&ext.stx_ctime);
418 }
419 }
420 None
421 }
422 }
423} else {
424 impl FileAttr {
425 fn from_stat64(stat: stat64) -> Self {
426 Self { stat }
427 }
428 }
429}}
430
431impl FileAttr {
432 pub fn size(&self) -> u64 {
433 self.stat.st_size as u64
434 }
435 pub fn perm(&self) -> FilePermissions {
436 FilePermissions { mode: (self.stat.st_mode as mode_t) }
437 }
438
439 pub fn file_type(&self) -> FileType {
440 FileType { mode: self.stat.st_mode as mode_t }
441 }
442}
443
444#[cfg(target_os = "netbsd")]
445impl FileAttr {
446 pub fn modified(&self) -> io::Result<SystemTime> {
447 SystemTime::new(self.stat.st_mtime as i64, self.stat.st_mtimensec as i64)
448 }
449
450 pub fn accessed(&self) -> io::Result<SystemTime> {
451 SystemTime::new(self.stat.st_atime as i64, self.stat.st_atimensec as i64)
452 }
453
454 pub fn created(&self) -> io::Result<SystemTime> {
455 SystemTime::new(self.stat.st_birthtime as i64, self.stat.st_birthtimensec as i64)
456 }
457}
458
459#[cfg(target_os = "aix")]
460impl FileAttr {
461 pub fn modified(&self) -> io::Result<SystemTime> {
462 SystemTime::new(self.stat.st_mtime.tv_sec as i64, self.stat.st_mtime.tv_nsec as i64)
463 }
464
465 pub fn accessed(&self) -> io::Result<SystemTime> {
466 SystemTime::new(self.stat.st_atime.tv_sec as i64, self.stat.st_atime.tv_nsec as i64)
467 }
468
469 pub fn created(&self) -> io::Result<SystemTime> {
470 SystemTime::new(self.stat.st_ctime.tv_sec as i64, self.stat.st_ctime.tv_nsec as i64)
471 }
472}
473
474#[cfg(not(any(target_os = "netbsd", target_os = "nto", target_os = "aix")))]
475impl FileAttr {
476 #[cfg(not(any(
477 target_os = "vxworks",
478 target_os = "espidf",
479 target_os = "horizon",
480 target_os = "vita",
481 target_os = "hurd",
482 target_os = "rtems",
483 target_os = "nuttx",
484 )))]
485 pub fn modified(&self) -> io::Result<SystemTime> {
486 #[cfg(target_pointer_width = "32")]
487 cfg_has_statx! {
488 if let Some(mtime) = self.stx_mtime() {
489 return SystemTime::new(mtime.tv_sec, mtime.tv_nsec as i64);
490 }
491 }
492
493 SystemTime::new(self.stat.st_mtime as i64, self.stat.st_mtime_nsec as i64)
494 }
495
496 #[cfg(any(
497 target_os = "vxworks",
498 target_os = "espidf",
499 target_os = "vita",
500 target_os = "rtems",
501 ))]
502 pub fn modified(&self) -> io::Result<SystemTime> {
503 SystemTime::new(self.stat.st_mtime as i64, 0)
504 }
505
506 #[cfg(any(target_os = "horizon", target_os = "hurd", target_os = "nuttx"))]
507 pub fn modified(&self) -> io::Result<SystemTime> {
508 SystemTime::new(self.stat.st_mtim.tv_sec as i64, self.stat.st_mtim.tv_nsec as i64)
509 }
510
511 #[cfg(not(any(
512 target_os = "vxworks",
513 target_os = "espidf",
514 target_os = "horizon",
515 target_os = "vita",
516 target_os = "hurd",
517 target_os = "rtems",
518 target_os = "nuttx",
519 )))]
520 pub fn accessed(&self) -> io::Result<SystemTime> {
521 #[cfg(target_pointer_width = "32")]
522 cfg_has_statx! {
523 if let Some(atime) = self.stx_atime() {
524 return SystemTime::new(atime.tv_sec, atime.tv_nsec as i64);
525 }
526 }
527
528 SystemTime::new(self.stat.st_atime as i64, self.stat.st_atime_nsec as i64)
529 }
530
531 #[cfg(any(
532 target_os = "vxworks",
533 target_os = "espidf",
534 target_os = "vita",
535 target_os = "rtems"
536 ))]
537 pub fn accessed(&self) -> io::Result<SystemTime> {
538 SystemTime::new(self.stat.st_atime as i64, 0)
539 }
540
541 #[cfg(any(target_os = "horizon", target_os = "hurd", target_os = "nuttx"))]
542 pub fn accessed(&self) -> io::Result<SystemTime> {
543 SystemTime::new(self.stat.st_atim.tv_sec as i64, self.stat.st_atim.tv_nsec as i64)
544 }
545
546 #[cfg(any(target_os = "freebsd", target_os = "openbsd", target_vendor = "apple"))]
547 pub fn created(&self) -> io::Result<SystemTime> {
548 SystemTime::new(self.stat.st_birthtime as i64, self.stat.st_birthtime_nsec as i64)
549 }
550
551 #[cfg(not(any(
552 target_os = "freebsd",
553 target_os = "openbsd",
554 target_os = "vita",
555 target_vendor = "apple",
556 )))]
557 pub fn created(&self) -> io::Result<SystemTime> {
558 cfg_has_statx! {
559 if let Some(ext) = &self.statx_extra_fields {
560 return if (ext.stx_mask & libc::STATX_BTIME) != 0 {
561 SystemTime::new(ext.stx_btime.tv_sec, ext.stx_btime.tv_nsec as i64)
562 } else {
563 Err(io::const_error!(
564 io::ErrorKind::Unsupported,
565 "creation time is not available for the filesystem",
566 ))
567 };
568 }
569 }
570
571 Err(io::const_error!(
572 io::ErrorKind::Unsupported,
573 "creation time is not available on this platform currently",
574 ))
575 }
576
577 #[cfg(target_os = "vita")]
578 pub fn created(&self) -> io::Result<SystemTime> {
579 SystemTime::new(self.stat.st_ctime as i64, 0)
580 }
581}
582
583#[cfg(target_os = "nto")]
584impl FileAttr {
585 pub fn modified(&self) -> io::Result<SystemTime> {
586 SystemTime::new(self.stat.st_mtim.tv_sec, self.stat.st_mtim.tv_nsec)
587 }
588
589 pub fn accessed(&self) -> io::Result<SystemTime> {
590 SystemTime::new(self.stat.st_atim.tv_sec, self.stat.st_atim.tv_nsec)
591 }
592
593 pub fn created(&self) -> io::Result<SystemTime> {
594 SystemTime::new(self.stat.st_ctim.tv_sec, self.stat.st_ctim.tv_nsec)
595 }
596}
597
598impl AsInner<stat64> for FileAttr {
599 #[inline]
600 fn as_inner(&self) -> &stat64 {
601 &self.stat
602 }
603}
604
605impl FilePermissions {
606 pub fn readonly(&self) -> bool {
607 self.mode & 0o222 == 0
609 }
610
611 pub fn set_readonly(&mut self, readonly: bool) {
612 if readonly {
613 self.mode &= !0o222;
615 } else {
616 self.mode |= 0o222;
618 }
619 }
620 pub fn mode(&self) -> u32 {
621 self.mode as u32
622 }
623}
624
625impl FileTimes {
626 pub fn set_accessed(&mut self, t: SystemTime) {
627 self.accessed = Some(t);
628 }
629
630 pub fn set_modified(&mut self, t: SystemTime) {
631 self.modified = Some(t);
632 }
633
634 #[cfg(target_vendor = "apple")]
635 pub fn set_created(&mut self, t: SystemTime) {
636 self.created = Some(t);
637 }
638}
639
640impl FileType {
641 pub fn is_dir(&self) -> bool {
642 self.is(libc::S_IFDIR)
643 }
644 pub fn is_file(&self) -> bool {
645 self.is(libc::S_IFREG)
646 }
647 pub fn is_symlink(&self) -> bool {
648 self.is(libc::S_IFLNK)
649 }
650
651 pub fn is(&self, mode: mode_t) -> bool {
652 self.masked() == mode
653 }
654
655 fn masked(&self) -> mode_t {
656 self.mode & libc::S_IFMT
657 }
658}
659
660impl fmt::Debug for FileType {
661 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
662 let FileType { mode } = self;
663 f.debug_struct("FileType").field("mode", &Mode(*mode)).finish()
664 }
665}
666
667impl FromInner<u32> for FilePermissions {
668 fn from_inner(mode: u32) -> FilePermissions {
669 FilePermissions { mode: mode as mode_t }
670 }
671}
672
673impl fmt::Debug for FilePermissions {
674 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
675 let FilePermissions { mode } = self;
676 f.debug_struct("FilePermissions").field("mode", &Mode(*mode)).finish()
677 }
678}
679
680impl fmt::Debug for ReadDir {
681 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
682 fmt::Debug::fmt(&*self.inner.root, f)
685 }
686}
687
688impl Iterator for ReadDir {
689 type Item = io::Result<DirEntry>;
690
691 #[cfg(any(
692 target_os = "android",
693 target_os = "linux",
694 target_os = "solaris",
695 target_os = "fuchsia",
696 target_os = "redox",
697 target_os = "illumos",
698 target_os = "aix",
699 target_os = "nto",
700 target_os = "vita",
701 target_os = "hurd",
702 ))]
703 fn next(&mut self) -> Option<io::Result<DirEntry>> {
704 use crate::sys::os::{errno, set_errno};
705
706 if self.end_of_stream {
707 return None;
708 }
709
710 unsafe {
711 loop {
712 set_errno(0);
718 let entry_ptr: *const dirent64 = readdir64(self.inner.dirp.0);
719 if entry_ptr.is_null() {
720 self.end_of_stream = true;
723
724 return match errno() {
727 0 => None,
728 e => Some(Err(Error::from_raw_os_error(e))),
729 };
730 }
731
732 let name = CStr::from_ptr((&raw const (*entry_ptr).d_name).cast());
752 let name_bytes = name.to_bytes();
753 if name_bytes == b"." || name_bytes == b".." {
754 continue;
755 }
756
757 #[cfg(not(target_os = "vita"))]
761 let entry = dirent64_min {
762 d_ino: (*entry_ptr).d_ino as u64,
763 #[cfg(not(any(
764 target_os = "solaris",
765 target_os = "illumos",
766 target_os = "aix",
767 target_os = "nto",
768 )))]
769 d_type: (*entry_ptr).d_type as u8,
770 };
771
772 #[cfg(target_os = "vita")]
773 let entry = dirent64_min { d_ino: 0u64 };
774
775 return Some(Ok(DirEntry {
776 entry,
777 name: name.to_owned(),
778 dir: Arc::clone(&self.inner),
779 }));
780 }
781 }
782 }
783
784 #[cfg(not(any(
785 target_os = "android",
786 target_os = "linux",
787 target_os = "solaris",
788 target_os = "fuchsia",
789 target_os = "redox",
790 target_os = "illumos",
791 target_os = "aix",
792 target_os = "nto",
793 target_os = "vita",
794 target_os = "hurd",
795 )))]
796 fn next(&mut self) -> Option<io::Result<DirEntry>> {
797 if self.end_of_stream {
798 return None;
799 }
800
801 unsafe {
802 let mut ret = DirEntry { entry: mem::zeroed(), dir: Arc::clone(&self.inner) };
803 let mut entry_ptr = ptr::null_mut();
804 loop {
805 let err = readdir64_r(self.inner.dirp.0, &mut ret.entry, &mut entry_ptr);
806 if err != 0 {
807 if entry_ptr.is_null() {
808 self.end_of_stream = true;
813 }
814 return Some(Err(Error::from_raw_os_error(err)));
815 }
816 if entry_ptr.is_null() {
817 return None;
818 }
819 if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
820 return Some(Ok(ret));
821 }
822 }
823 }
824 }
825}
826
827#[inline]
836pub(crate) fn debug_assert_fd_is_open(fd: RawFd) {
837 use crate::sys::os::errno;
838
839 if core::ub_checks::check_library_ub() {
841 if unsafe { libc::fcntl(fd, libc::F_GETFD) } == -1 && errno() == libc::EBADF {
842 rtabort!("IO Safety violation: owned file descriptor already closed");
843 }
844 }
845}
846
847impl Drop for Dir {
848 fn drop(&mut self) {
849 #[cfg(not(any(
851 miri,
852 target_os = "redox",
853 target_os = "nto",
854 target_os = "vita",
855 target_os = "hurd",
856 target_os = "espidf",
857 target_os = "horizon",
858 target_os = "vxworks",
859 target_os = "rtems",
860 target_os = "nuttx",
861 )))]
862 {
863 let fd = unsafe { libc::dirfd(self.0) };
864 debug_assert_fd_is_open(fd);
865 }
866 let r = unsafe { libc::closedir(self.0) };
867 assert!(
868 r == 0 || crate::io::Error::last_os_error().is_interrupted(),
869 "unexpected error during closedir: {:?}",
870 crate::io::Error::last_os_error()
871 );
872 }
873}
874
875impl DirEntry {
876 pub fn path(&self) -> PathBuf {
877 self.dir.root.join(self.file_name_os_str())
878 }
879
880 pub fn file_name(&self) -> OsString {
881 self.file_name_os_str().to_os_string()
882 }
883
884 #[cfg(all(
885 any(
886 all(target_os = "linux", not(target_env = "musl")),
887 target_os = "android",
888 target_os = "fuchsia",
889 target_os = "hurd"
890 ),
891 not(miri) ))]
893 pub fn metadata(&self) -> io::Result<FileAttr> {
894 let fd = cvt(unsafe { dirfd(self.dir.dirp.0) })?;
895 let name = self.name_cstr().as_ptr();
896
897 cfg_has_statx! {
898 if let Some(ret) = unsafe { try_statx(
899 fd,
900 name,
901 libc::AT_SYMLINK_NOFOLLOW | libc::AT_STATX_SYNC_AS_STAT,
902 libc::STATX_BASIC_STATS | libc::STATX_BTIME,
903 ) } {
904 return ret;
905 }
906 }
907
908 let mut stat: stat64 = unsafe { mem::zeroed() };
909 cvt(unsafe { fstatat64(fd, name, &mut stat, libc::AT_SYMLINK_NOFOLLOW) })?;
910 Ok(FileAttr::from_stat64(stat))
911 }
912
913 #[cfg(any(
914 not(any(
915 all(target_os = "linux", not(target_env = "musl")),
916 target_os = "android",
917 target_os = "fuchsia",
918 target_os = "hurd",
919 )),
920 miri
921 ))]
922 pub fn metadata(&self) -> io::Result<FileAttr> {
923 lstat(&self.path())
924 }
925
926 #[cfg(any(
927 target_os = "solaris",
928 target_os = "illumos",
929 target_os = "haiku",
930 target_os = "vxworks",
931 target_os = "aix",
932 target_os = "nto",
933 target_os = "vita",
934 ))]
935 pub fn file_type(&self) -> io::Result<FileType> {
936 self.metadata().map(|m| m.file_type())
937 }
938
939 #[cfg(not(any(
940 target_os = "solaris",
941 target_os = "illumos",
942 target_os = "haiku",
943 target_os = "vxworks",
944 target_os = "aix",
945 target_os = "nto",
946 target_os = "vita",
947 )))]
948 pub fn file_type(&self) -> io::Result<FileType> {
949 match self.entry.d_type {
950 libc::DT_CHR => Ok(FileType { mode: libc::S_IFCHR }),
951 libc::DT_FIFO => Ok(FileType { mode: libc::S_IFIFO }),
952 libc::DT_LNK => Ok(FileType { mode: libc::S_IFLNK }),
953 libc::DT_REG => Ok(FileType { mode: libc::S_IFREG }),
954 libc::DT_SOCK => Ok(FileType { mode: libc::S_IFSOCK }),
955 libc::DT_DIR => Ok(FileType { mode: libc::S_IFDIR }),
956 libc::DT_BLK => Ok(FileType { mode: libc::S_IFBLK }),
957 _ => self.metadata().map(|m| m.file_type()),
958 }
959 }
960
961 #[cfg(any(
962 target_os = "linux",
963 target_os = "emscripten",
964 target_os = "android",
965 target_os = "solaris",
966 target_os = "illumos",
967 target_os = "haiku",
968 target_os = "l4re",
969 target_os = "fuchsia",
970 target_os = "redox",
971 target_os = "vxworks",
972 target_os = "espidf",
973 target_os = "horizon",
974 target_os = "vita",
975 target_os = "aix",
976 target_os = "nto",
977 target_os = "hurd",
978 target_os = "rtems",
979 target_vendor = "apple",
980 ))]
981 pub fn ino(&self) -> u64 {
982 self.entry.d_ino as u64
983 }
984
985 #[cfg(any(
986 target_os = "freebsd",
987 target_os = "openbsd",
988 target_os = "netbsd",
989 target_os = "dragonfly"
990 ))]
991 pub fn ino(&self) -> u64 {
992 self.entry.d_fileno as u64
993 }
994
995 #[cfg(target_os = "nuttx")]
996 pub fn ino(&self) -> u64 {
997 0
1000 }
1001
1002 #[cfg(any(
1003 target_os = "netbsd",
1004 target_os = "openbsd",
1005 target_os = "freebsd",
1006 target_os = "dragonfly",
1007 target_vendor = "apple",
1008 ))]
1009 fn name_bytes(&self) -> &[u8] {
1010 use crate::slice;
1011 unsafe {
1012 slice::from_raw_parts(
1013 self.entry.d_name.as_ptr() as *const u8,
1014 self.entry.d_namlen as usize,
1015 )
1016 }
1017 }
1018 #[cfg(not(any(
1019 target_os = "netbsd",
1020 target_os = "openbsd",
1021 target_os = "freebsd",
1022 target_os = "dragonfly",
1023 target_vendor = "apple",
1024 )))]
1025 fn name_bytes(&self) -> &[u8] {
1026 self.name_cstr().to_bytes()
1027 }
1028
1029 #[cfg(not(any(
1030 target_os = "android",
1031 target_os = "linux",
1032 target_os = "solaris",
1033 target_os = "illumos",
1034 target_os = "fuchsia",
1035 target_os = "redox",
1036 target_os = "aix",
1037 target_os = "nto",
1038 target_os = "vita",
1039 target_os = "hurd",
1040 )))]
1041 fn name_cstr(&self) -> &CStr {
1042 unsafe { CStr::from_ptr(self.entry.d_name.as_ptr()) }
1043 }
1044 #[cfg(any(
1045 target_os = "android",
1046 target_os = "linux",
1047 target_os = "solaris",
1048 target_os = "illumos",
1049 target_os = "fuchsia",
1050 target_os = "redox",
1051 target_os = "aix",
1052 target_os = "nto",
1053 target_os = "vita",
1054 target_os = "hurd",
1055 ))]
1056 fn name_cstr(&self) -> &CStr {
1057 &self.name
1058 }
1059
1060 pub fn file_name_os_str(&self) -> &OsStr {
1061 OsStr::from_bytes(self.name_bytes())
1062 }
1063}
1064
1065impl OpenOptions {
1066 pub fn new() -> OpenOptions {
1067 OpenOptions {
1068 read: false,
1070 write: false,
1071 append: false,
1072 truncate: false,
1073 create: false,
1074 create_new: false,
1075 custom_flags: 0,
1077 mode: 0o666,
1078 }
1079 }
1080
1081 pub fn read(&mut self, read: bool) {
1082 self.read = read;
1083 }
1084 pub fn write(&mut self, write: bool) {
1085 self.write = write;
1086 }
1087 pub fn append(&mut self, append: bool) {
1088 self.append = append;
1089 }
1090 pub fn truncate(&mut self, truncate: bool) {
1091 self.truncate = truncate;
1092 }
1093 pub fn create(&mut self, create: bool) {
1094 self.create = create;
1095 }
1096 pub fn create_new(&mut self, create_new: bool) {
1097 self.create_new = create_new;
1098 }
1099
1100 pub fn custom_flags(&mut self, flags: i32) {
1101 self.custom_flags = flags;
1102 }
1103 pub fn mode(&mut self, mode: u32) {
1104 self.mode = mode as mode_t;
1105 }
1106
1107 fn get_access_mode(&self) -> io::Result<c_int> {
1108 match (self.read, self.write, self.append) {
1109 (true, false, false) => Ok(libc::O_RDONLY),
1110 (false, true, false) => Ok(libc::O_WRONLY),
1111 (true, true, false) => Ok(libc::O_RDWR),
1112 (false, _, true) => Ok(libc::O_WRONLY | libc::O_APPEND),
1113 (true, _, true) => Ok(libc::O_RDWR | libc::O_APPEND),
1114 (false, false, false) => Err(Error::from_raw_os_error(libc::EINVAL)),
1115 }
1116 }
1117
1118 fn get_creation_mode(&self) -> io::Result<c_int> {
1119 match (self.write, self.append) {
1120 (true, false) => {}
1121 (false, false) => {
1122 if self.truncate || self.create || self.create_new {
1123 return Err(Error::from_raw_os_error(libc::EINVAL));
1124 }
1125 }
1126 (_, true) => {
1127 if self.truncate && !self.create_new {
1128 return Err(Error::from_raw_os_error(libc::EINVAL));
1129 }
1130 }
1131 }
1132
1133 Ok(match (self.create, self.truncate, self.create_new) {
1134 (false, false, false) => 0,
1135 (true, false, false) => libc::O_CREAT,
1136 (false, true, false) => libc::O_TRUNC,
1137 (true, true, false) => libc::O_CREAT | libc::O_TRUNC,
1138 (_, _, true) => libc::O_CREAT | libc::O_EXCL,
1139 })
1140 }
1141}
1142
1143impl fmt::Debug for OpenOptions {
1144 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1145 let OpenOptions { read, write, append, truncate, create, create_new, custom_flags, mode } =
1146 self;
1147 f.debug_struct("OpenOptions")
1148 .field("read", read)
1149 .field("write", write)
1150 .field("append", append)
1151 .field("truncate", truncate)
1152 .field("create", create)
1153 .field("create_new", create_new)
1154 .field("custom_flags", custom_flags)
1155 .field("mode", &Mode(*mode))
1156 .finish()
1157 }
1158}
1159
1160impl File {
1161 pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
1162 run_path_with_cstr(path, &|path| File::open_c(path, opts))
1163 }
1164
1165 pub fn open_c(path: &CStr, opts: &OpenOptions) -> io::Result<File> {
1166 let flags = libc::O_CLOEXEC
1167 | opts.get_access_mode()?
1168 | opts.get_creation_mode()?
1169 | (opts.custom_flags as c_int & !libc::O_ACCMODE);
1170 let fd = cvt_r(|| unsafe { open64(path.as_ptr(), flags, opts.mode as c_int) })?;
1175 Ok(File(unsafe { FileDesc::from_raw_fd(fd) }))
1176 }
1177
1178 pub fn file_attr(&self) -> io::Result<FileAttr> {
1179 let fd = self.as_raw_fd();
1180
1181 cfg_has_statx! {
1182 if let Some(ret) = unsafe { try_statx(
1183 fd,
1184 c"".as_ptr() as *const c_char,
1185 libc::AT_EMPTY_PATH | libc::AT_STATX_SYNC_AS_STAT,
1186 libc::STATX_BASIC_STATS | libc::STATX_BTIME,
1187 ) } {
1188 return ret;
1189 }
1190 }
1191
1192 let mut stat: stat64 = unsafe { mem::zeroed() };
1193 cvt(unsafe { fstat64(fd, &mut stat) })?;
1194 Ok(FileAttr::from_stat64(stat))
1195 }
1196
1197 pub fn fsync(&self) -> io::Result<()> {
1198 cvt_r(|| unsafe { os_fsync(self.as_raw_fd()) })?;
1199 return Ok(());
1200
1201 #[cfg(target_vendor = "apple")]
1202 unsafe fn os_fsync(fd: c_int) -> c_int {
1203 libc::fcntl(fd, libc::F_FULLFSYNC)
1204 }
1205 #[cfg(not(target_vendor = "apple"))]
1206 unsafe fn os_fsync(fd: c_int) -> c_int {
1207 libc::fsync(fd)
1208 }
1209 }
1210
1211 pub fn datasync(&self) -> io::Result<()> {
1212 cvt_r(|| unsafe { os_datasync(self.as_raw_fd()) })?;
1213 return Ok(());
1214
1215 #[cfg(target_vendor = "apple")]
1216 unsafe fn os_datasync(fd: c_int) -> c_int {
1217 libc::fcntl(fd, libc::F_FULLFSYNC)
1218 }
1219 #[cfg(any(
1220 target_os = "freebsd",
1221 target_os = "fuchsia",
1222 target_os = "linux",
1223 target_os = "android",
1224 target_os = "netbsd",
1225 target_os = "openbsd",
1226 target_os = "nto",
1227 target_os = "hurd",
1228 ))]
1229 unsafe fn os_datasync(fd: c_int) -> c_int {
1230 libc::fdatasync(fd)
1231 }
1232 #[cfg(not(any(
1233 target_os = "android",
1234 target_os = "fuchsia",
1235 target_os = "freebsd",
1236 target_os = "linux",
1237 target_os = "netbsd",
1238 target_os = "openbsd",
1239 target_os = "nto",
1240 target_os = "hurd",
1241 target_vendor = "apple",
1242 )))]
1243 unsafe fn os_datasync(fd: c_int) -> c_int {
1244 libc::fsync(fd)
1245 }
1246 }
1247
1248 #[cfg(any(
1249 target_os = "freebsd",
1250 target_os = "fuchsia",
1251 target_os = "linux",
1252 target_os = "netbsd",
1253 target_vendor = "apple",
1254 ))]
1255 pub fn lock(&self) -> io::Result<()> {
1256 cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_EX) })?;
1257 return Ok(());
1258 }
1259
1260 #[cfg(not(any(
1261 target_os = "freebsd",
1262 target_os = "fuchsia",
1263 target_os = "linux",
1264 target_os = "netbsd",
1265 target_vendor = "apple",
1266 )))]
1267 pub fn lock(&self) -> io::Result<()> {
1268 Err(io::const_error!(io::ErrorKind::Unsupported, "lock() not supported"))
1269 }
1270
1271 #[cfg(any(
1272 target_os = "freebsd",
1273 target_os = "fuchsia",
1274 target_os = "linux",
1275 target_os = "netbsd",
1276 target_vendor = "apple",
1277 ))]
1278 pub fn lock_shared(&self) -> io::Result<()> {
1279 cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_SH) })?;
1280 return Ok(());
1281 }
1282
1283 #[cfg(not(any(
1284 target_os = "freebsd",
1285 target_os = "fuchsia",
1286 target_os = "linux",
1287 target_os = "netbsd",
1288 target_vendor = "apple",
1289 )))]
1290 pub fn lock_shared(&self) -> io::Result<()> {
1291 Err(io::const_error!(io::ErrorKind::Unsupported, "lock_shared() not supported"))
1292 }
1293
1294 #[cfg(any(
1295 target_os = "freebsd",
1296 target_os = "fuchsia",
1297 target_os = "linux",
1298 target_os = "netbsd",
1299 target_vendor = "apple",
1300 ))]
1301 pub fn try_lock(&self) -> io::Result<bool> {
1302 let result = cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_EX | libc::LOCK_NB) });
1303 if let Err(ref err) = result {
1304 if err.kind() == io::ErrorKind::WouldBlock {
1305 return Ok(false);
1306 }
1307 }
1308 result?;
1309 return Ok(true);
1310 }
1311
1312 #[cfg(not(any(
1313 target_os = "freebsd",
1314 target_os = "fuchsia",
1315 target_os = "linux",
1316 target_os = "netbsd",
1317 target_vendor = "apple",
1318 )))]
1319 pub fn try_lock(&self) -> io::Result<bool> {
1320 Err(io::const_error!(io::ErrorKind::Unsupported, "try_lock() not supported"))
1321 }
1322
1323 #[cfg(any(
1324 target_os = "freebsd",
1325 target_os = "fuchsia",
1326 target_os = "linux",
1327 target_os = "netbsd",
1328 target_vendor = "apple",
1329 ))]
1330 pub fn try_lock_shared(&self) -> io::Result<bool> {
1331 let result = cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_SH | libc::LOCK_NB) });
1332 if let Err(ref err) = result {
1333 if err.kind() == io::ErrorKind::WouldBlock {
1334 return Ok(false);
1335 }
1336 }
1337 result?;
1338 return Ok(true);
1339 }
1340
1341 #[cfg(not(any(
1342 target_os = "freebsd",
1343 target_os = "fuchsia",
1344 target_os = "linux",
1345 target_os = "netbsd",
1346 target_vendor = "apple",
1347 )))]
1348 pub fn try_lock_shared(&self) -> io::Result<bool> {
1349 Err(io::const_error!(io::ErrorKind::Unsupported, "try_lock_shared() not supported"))
1350 }
1351
1352 #[cfg(any(
1353 target_os = "freebsd",
1354 target_os = "fuchsia",
1355 target_os = "linux",
1356 target_os = "netbsd",
1357 target_vendor = "apple",
1358 ))]
1359 pub fn unlock(&self) -> io::Result<()> {
1360 cvt(unsafe { libc::flock(self.as_raw_fd(), libc::LOCK_UN) })?;
1361 return Ok(());
1362 }
1363
1364 #[cfg(not(any(
1365 target_os = "freebsd",
1366 target_os = "fuchsia",
1367 target_os = "linux",
1368 target_os = "netbsd",
1369 target_vendor = "apple",
1370 )))]
1371 pub fn unlock(&self) -> io::Result<()> {
1372 Err(io::const_error!(io::ErrorKind::Unsupported, "unlock() not supported"))
1373 }
1374
1375 pub fn truncate(&self, size: u64) -> io::Result<()> {
1376 let size: off64_t =
1377 size.try_into().map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))?;
1378 cvt_r(|| unsafe { ftruncate64(self.as_raw_fd(), size) }).map(drop)
1379 }
1380
1381 pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
1382 self.0.read(buf)
1383 }
1384
1385 pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
1386 self.0.read_vectored(bufs)
1387 }
1388
1389 #[inline]
1390 pub fn is_read_vectored(&self) -> bool {
1391 self.0.is_read_vectored()
1392 }
1393
1394 pub fn read_at(&self, buf: &mut [u8], offset: u64) -> io::Result<usize> {
1395 self.0.read_at(buf, offset)
1396 }
1397
1398 pub fn read_buf(&self, cursor: BorrowedCursor<'_>) -> io::Result<()> {
1399 self.0.read_buf(cursor)
1400 }
1401
1402 pub fn read_vectored_at(&self, bufs: &mut [IoSliceMut<'_>], offset: u64) -> io::Result<usize> {
1403 self.0.read_vectored_at(bufs, offset)
1404 }
1405
1406 pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
1407 self.0.write(buf)
1408 }
1409
1410 pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
1411 self.0.write_vectored(bufs)
1412 }
1413
1414 #[inline]
1415 pub fn is_write_vectored(&self) -> bool {
1416 self.0.is_write_vectored()
1417 }
1418
1419 pub fn write_at(&self, buf: &[u8], offset: u64) -> io::Result<usize> {
1420 self.0.write_at(buf, offset)
1421 }
1422
1423 pub fn write_vectored_at(&self, bufs: &[IoSlice<'_>], offset: u64) -> io::Result<usize> {
1424 self.0.write_vectored_at(bufs, offset)
1425 }
1426
1427 #[inline]
1428 pub fn flush(&self) -> io::Result<()> {
1429 Ok(())
1430 }
1431
1432 pub fn seek(&self, pos: SeekFrom) -> io::Result<u64> {
1433 let (whence, pos) = match pos {
1434 SeekFrom::Start(off) => (libc::SEEK_SET, off as i64),
1437 SeekFrom::End(off) => (libc::SEEK_END, off),
1438 SeekFrom::Current(off) => (libc::SEEK_CUR, off),
1439 };
1440 let n = cvt(unsafe { lseek64(self.as_raw_fd(), pos as off64_t, whence) })?;
1441 Ok(n as u64)
1442 }
1443
1444 pub fn tell(&self) -> io::Result<u64> {
1445 self.seek(SeekFrom::Current(0))
1446 }
1447
1448 pub fn duplicate(&self) -> io::Result<File> {
1449 self.0.duplicate().map(File)
1450 }
1451
1452 pub fn set_permissions(&self, perm: FilePermissions) -> io::Result<()> {
1453 cvt_r(|| unsafe { libc::fchmod(self.as_raw_fd(), perm.mode) })?;
1454 Ok(())
1455 }
1456
1457 #[cfg_attr(
1460 any(
1461 target_os = "android",
1462 all(
1463 target_os = "linux",
1464 target_env = "gnu",
1465 target_pointer_width = "32",
1466 not(target_arch = "riscv32")
1467 )
1468 ),
1469 no_sanitize(cfi)
1470 )]
1471 pub fn set_times(&self, times: FileTimes) -> io::Result<()> {
1472 #[cfg(not(any(
1473 target_os = "redox",
1474 target_os = "espidf",
1475 target_os = "horizon",
1476 target_os = "vxworks",
1477 target_os = "nuttx",
1478 )))]
1479 let to_timespec = |time: Option<SystemTime>| match time {
1480 Some(time) if let Some(ts) = time.t.to_timespec() => Ok(ts),
1481 Some(time) if time > crate::sys::time::UNIX_EPOCH => Err(io::const_error!(
1482 io::ErrorKind::InvalidInput,
1483 "timestamp is too large to set as a file time",
1484 )),
1485 Some(_) => Err(io::const_error!(
1486 io::ErrorKind::InvalidInput,
1487 "timestamp is too small to set as a file time",
1488 )),
1489 None => Ok(libc::timespec { tv_sec: 0, tv_nsec: libc::UTIME_OMIT as _ }),
1490 };
1491 cfg_if::cfg_if! {
1492 if #[cfg(any(target_os = "redox", target_os = "espidf", target_os = "horizon", target_os = "vxworks", target_os = "nuttx"))] {
1493 let _ = times;
1498 Err(io::const_error!(
1499 io::ErrorKind::Unsupported,
1500 "setting file times not supported",
1501 ))
1502 } else if #[cfg(target_vendor = "apple")] {
1503 let mut buf = [mem::MaybeUninit::<libc::timespec>::uninit(); 3];
1504 let mut num_times = 0;
1505 let mut attrlist: libc::attrlist = unsafe { mem::zeroed() };
1506 attrlist.bitmapcount = libc::ATTR_BIT_MAP_COUNT;
1507 if times.created.is_some() {
1508 buf[num_times].write(to_timespec(times.created)?);
1509 num_times += 1;
1510 attrlist.commonattr |= libc::ATTR_CMN_CRTIME;
1511 }
1512 if times.modified.is_some() {
1513 buf[num_times].write(to_timespec(times.modified)?);
1514 num_times += 1;
1515 attrlist.commonattr |= libc::ATTR_CMN_MODTIME;
1516 }
1517 if times.accessed.is_some() {
1518 buf[num_times].write(to_timespec(times.accessed)?);
1519 num_times += 1;
1520 attrlist.commonattr |= libc::ATTR_CMN_ACCTIME;
1521 }
1522 cvt(unsafe { libc::fsetattrlist(
1523 self.as_raw_fd(),
1524 (&raw const attrlist).cast::<libc::c_void>().cast_mut(),
1525 buf.as_ptr().cast::<libc::c_void>().cast_mut(),
1526 num_times * size_of::<libc::timespec>(),
1527 0
1528 ) })?;
1529 Ok(())
1530 } else if #[cfg(target_os = "android")] {
1531 let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
1532 cvt(unsafe {
1534 weak!(fn futimens(c_int, *const libc::timespec) -> c_int);
1535 match futimens.get() {
1536 Some(futimens) => futimens(self.as_raw_fd(), times.as_ptr()),
1537 None => return Err(io::const_error!(
1538 io::ErrorKind::Unsupported,
1539 "setting file times requires Android API level >= 19",
1540 )),
1541 }
1542 })?;
1543 Ok(())
1544 } else {
1545 #[cfg(all(target_os = "linux", target_env = "gnu", target_pointer_width = "32", not(target_arch = "riscv32")))]
1546 {
1547 use crate::sys::{time::__timespec64, weak::weak};
1548
1549 weak!(fn __futimens64(libc::c_int, *const __timespec64) -> libc::c_int);
1551
1552 if let Some(futimens64) = __futimens64.get() {
1553 let to_timespec = |time: Option<SystemTime>| time.map(|time| time.t.to_timespec64())
1554 .unwrap_or(__timespec64::new(0, libc::UTIME_OMIT as _));
1555 let times = [to_timespec(times.accessed), to_timespec(times.modified)];
1556 cvt(unsafe { futimens64(self.as_raw_fd(), times.as_ptr()) })?;
1557 return Ok(());
1558 }
1559 }
1560 let times = [to_timespec(times.accessed)?, to_timespec(times.modified)?];
1561 cvt(unsafe { libc::futimens(self.as_raw_fd(), times.as_ptr()) })?;
1562 Ok(())
1563 }
1564 }
1565 }
1566}
1567
1568impl DirBuilder {
1569 pub fn new() -> DirBuilder {
1570 DirBuilder { mode: 0o777 }
1571 }
1572
1573 pub fn mkdir(&self, p: &Path) -> io::Result<()> {
1574 run_path_with_cstr(p, &|p| cvt(unsafe { libc::mkdir(p.as_ptr(), self.mode) }).map(|_| ()))
1575 }
1576
1577 pub fn set_mode(&mut self, mode: u32) {
1578 self.mode = mode as mode_t;
1579 }
1580}
1581
1582impl fmt::Debug for DirBuilder {
1583 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1584 let DirBuilder { mode } = self;
1585 f.debug_struct("DirBuilder").field("mode", &Mode(*mode)).finish()
1586 }
1587}
1588
1589impl AsInner<FileDesc> for File {
1590 #[inline]
1591 fn as_inner(&self) -> &FileDesc {
1592 &self.0
1593 }
1594}
1595
1596impl AsInnerMut<FileDesc> for File {
1597 #[inline]
1598 fn as_inner_mut(&mut self) -> &mut FileDesc {
1599 &mut self.0
1600 }
1601}
1602
1603impl IntoInner<FileDesc> for File {
1604 fn into_inner(self) -> FileDesc {
1605 self.0
1606 }
1607}
1608
1609impl FromInner<FileDesc> for File {
1610 fn from_inner(file_desc: FileDesc) -> Self {
1611 Self(file_desc)
1612 }
1613}
1614
1615impl AsFd for File {
1616 #[inline]
1617 fn as_fd(&self) -> BorrowedFd<'_> {
1618 self.0.as_fd()
1619 }
1620}
1621
1622impl AsRawFd for File {
1623 #[inline]
1624 fn as_raw_fd(&self) -> RawFd {
1625 self.0.as_raw_fd()
1626 }
1627}
1628
1629impl IntoRawFd for File {
1630 fn into_raw_fd(self) -> RawFd {
1631 self.0.into_raw_fd()
1632 }
1633}
1634
1635impl FromRawFd for File {
1636 unsafe fn from_raw_fd(raw_fd: RawFd) -> Self {
1637 Self(FromRawFd::from_raw_fd(raw_fd))
1638 }
1639}
1640
1641impl fmt::Debug for File {
1642 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1643 #[cfg(any(target_os = "linux", target_os = "illumos", target_os = "solaris"))]
1644 fn get_path(fd: c_int) -> Option<PathBuf> {
1645 let mut p = PathBuf::from("/proc/self/fd");
1646 p.push(&fd.to_string());
1647 readlink(&p).ok()
1648 }
1649
1650 #[cfg(any(target_vendor = "apple", target_os = "netbsd"))]
1651 fn get_path(fd: c_int) -> Option<PathBuf> {
1652 let mut buf = vec![0; libc::PATH_MAX as usize];
1658 let n = unsafe { libc::fcntl(fd, libc::F_GETPATH, buf.as_ptr()) };
1659 if n == -1 {
1660 cfg_if::cfg_if! {
1661 if #[cfg(target_os = "netbsd")] {
1662 let mut p = PathBuf::from("/proc/self/fd");
1664 p.push(&fd.to_string());
1665 return readlink(&p).ok();
1666 } else {
1667 return None;
1668 }
1669 }
1670 }
1671 let l = buf.iter().position(|&c| c == 0).unwrap();
1672 buf.truncate(l as usize);
1673 buf.shrink_to_fit();
1674 Some(PathBuf::from(OsString::from_vec(buf)))
1675 }
1676
1677 #[cfg(target_os = "freebsd")]
1678 fn get_path(fd: c_int) -> Option<PathBuf> {
1679 let info = Box::<libc::kinfo_file>::new_zeroed();
1680 let mut info = unsafe { info.assume_init() };
1681 info.kf_structsize = size_of::<libc::kinfo_file>() as libc::c_int;
1682 let n = unsafe { libc::fcntl(fd, libc::F_KINFO, &mut *info) };
1683 if n == -1 {
1684 return None;
1685 }
1686 let buf = unsafe { CStr::from_ptr(info.kf_path.as_mut_ptr()).to_bytes().to_vec() };
1687 Some(PathBuf::from(OsString::from_vec(buf)))
1688 }
1689
1690 #[cfg(target_os = "vxworks")]
1691 fn get_path(fd: c_int) -> Option<PathBuf> {
1692 let mut buf = vec![0; libc::PATH_MAX as usize];
1693 let n = unsafe { libc::ioctl(fd, libc::FIOGETNAME, buf.as_ptr()) };
1694 if n == -1 {
1695 return None;
1696 }
1697 let l = buf.iter().position(|&c| c == 0).unwrap();
1698 buf.truncate(l as usize);
1699 Some(PathBuf::from(OsString::from_vec(buf)))
1700 }
1701
1702 #[cfg(not(any(
1703 target_os = "linux",
1704 target_os = "vxworks",
1705 target_os = "freebsd",
1706 target_os = "netbsd",
1707 target_os = "illumos",
1708 target_os = "solaris",
1709 target_vendor = "apple",
1710 )))]
1711 fn get_path(_fd: c_int) -> Option<PathBuf> {
1712 None
1714 }
1715
1716 fn get_mode(fd: c_int) -> Option<(bool, bool)> {
1717 let mode = unsafe { libc::fcntl(fd, libc::F_GETFL) };
1718 if mode == -1 {
1719 return None;
1720 }
1721 match mode & libc::O_ACCMODE {
1722 libc::O_RDONLY => Some((true, false)),
1723 libc::O_RDWR => Some((true, true)),
1724 libc::O_WRONLY => Some((false, true)),
1725 _ => None,
1726 }
1727 }
1728
1729 let fd = self.as_raw_fd();
1730 let mut b = f.debug_struct("File");
1731 b.field("fd", &fd);
1732 if let Some(path) = get_path(fd) {
1733 b.field("path", &path);
1734 }
1735 if let Some((read, write)) = get_mode(fd) {
1736 b.field("read", &read).field("write", &write);
1737 }
1738 b.finish()
1739 }
1740}
1741
1742impl fmt::Debug for Mode {
1752 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1753 let Self(mode) = *self;
1754 write!(f, "0o{mode:06o}")?;
1755
1756 let entry_type = match mode & libc::S_IFMT {
1757 libc::S_IFDIR => 'd',
1758 libc::S_IFBLK => 'b',
1759 libc::S_IFCHR => 'c',
1760 libc::S_IFLNK => 'l',
1761 libc::S_IFIFO => 'p',
1762 libc::S_IFREG => '-',
1763 _ => return Ok(()),
1764 };
1765
1766 f.write_str(" (")?;
1767 f.write_char(entry_type)?;
1768
1769 f.write_char(if mode & libc::S_IRUSR != 0 { 'r' } else { '-' })?;
1771 f.write_char(if mode & libc::S_IWUSR != 0 { 'w' } else { '-' })?;
1772 let owner_executable = mode & libc::S_IXUSR != 0;
1773 let setuid = mode as c_int & libc::S_ISUID as c_int != 0;
1774 f.write_char(match (owner_executable, setuid) {
1775 (true, true) => 's', (false, true) => 'S', (true, false) => 'x', (false, false) => '-',
1779 })?;
1780
1781 f.write_char(if mode & libc::S_IRGRP != 0 { 'r' } else { '-' })?;
1783 f.write_char(if mode & libc::S_IWGRP != 0 { 'w' } else { '-' })?;
1784 let group_executable = mode & libc::S_IXGRP != 0;
1785 let setgid = mode as c_int & libc::S_ISGID as c_int != 0;
1786 f.write_char(match (group_executable, setgid) {
1787 (true, true) => 's', (false, true) => 'S', (true, false) => 'x', (false, false) => '-',
1791 })?;
1792
1793 f.write_char(if mode & libc::S_IROTH != 0 { 'r' } else { '-' })?;
1795 f.write_char(if mode & libc::S_IWOTH != 0 { 'w' } else { '-' })?;
1796 let other_executable = mode & libc::S_IXOTH != 0;
1797 let sticky = mode as c_int & libc::S_ISVTX as c_int != 0;
1798 f.write_char(match (entry_type, other_executable, sticky) {
1799 ('d', true, true) => 't', ('d', false, true) => 'T', (_, true, _) => 'x', (_, false, _) => '-',
1803 })?;
1804
1805 f.write_char(')')
1806 }
1807}
1808
1809pub fn readdir(path: &Path) -> io::Result<ReadDir> {
1810 let ptr = run_path_with_cstr(path, &|p| unsafe { Ok(libc::opendir(p.as_ptr())) })?;
1811 if ptr.is_null() {
1812 Err(Error::last_os_error())
1813 } else {
1814 let root = path.to_path_buf();
1815 let inner = InnerReadDir { dirp: Dir(ptr), root };
1816 Ok(ReadDir::new(inner))
1817 }
1818}
1819
1820pub fn unlink(p: &Path) -> io::Result<()> {
1821 run_path_with_cstr(p, &|p| cvt(unsafe { libc::unlink(p.as_ptr()) }).map(|_| ()))
1822}
1823
1824pub fn rename(old: &Path, new: &Path) -> io::Result<()> {
1825 run_path_with_cstr(old, &|old| {
1826 run_path_with_cstr(new, &|new| {
1827 cvt(unsafe { libc::rename(old.as_ptr(), new.as_ptr()) }).map(|_| ())
1828 })
1829 })
1830}
1831
1832pub fn set_perm(p: &Path, perm: FilePermissions) -> io::Result<()> {
1833 run_path_with_cstr(p, &|p| cvt_r(|| unsafe { libc::chmod(p.as_ptr(), perm.mode) }).map(|_| ()))
1834}
1835
1836pub fn rmdir(p: &Path) -> io::Result<()> {
1837 run_path_with_cstr(p, &|p| cvt(unsafe { libc::rmdir(p.as_ptr()) }).map(|_| ()))
1838}
1839
1840pub fn readlink(p: &Path) -> io::Result<PathBuf> {
1841 run_path_with_cstr(p, &|c_path| {
1842 let p = c_path.as_ptr();
1843
1844 let mut buf = Vec::with_capacity(256);
1845
1846 loop {
1847 let buf_read =
1848 cvt(unsafe { libc::readlink(p, buf.as_mut_ptr() as *mut _, buf.capacity()) })?
1849 as usize;
1850
1851 unsafe {
1852 buf.set_len(buf_read);
1853 }
1854
1855 if buf_read != buf.capacity() {
1856 buf.shrink_to_fit();
1857
1858 return Ok(PathBuf::from(OsString::from_vec(buf)));
1859 }
1860
1861 buf.reserve(1);
1865 }
1866 })
1867}
1868
1869pub fn symlink(original: &Path, link: &Path) -> io::Result<()> {
1870 run_path_with_cstr(original, &|original| {
1871 run_path_with_cstr(link, &|link| {
1872 cvt(unsafe { libc::symlink(original.as_ptr(), link.as_ptr()) }).map(|_| ())
1873 })
1874 })
1875}
1876
1877pub fn link(original: &Path, link: &Path) -> io::Result<()> {
1878 run_path_with_cstr(original, &|original| {
1879 run_path_with_cstr(link, &|link| {
1880 cfg_if::cfg_if! {
1881 if #[cfg(any(target_os = "vxworks", target_os = "redox", target_os = "android", target_os = "espidf", target_os = "horizon", target_os = "vita", target_env = "nto70"))] {
1882 cvt(unsafe { libc::link(original.as_ptr(), link.as_ptr()) })?;
1888 } else {
1889 cvt(unsafe { libc::linkat(libc::AT_FDCWD, original.as_ptr(), libc::AT_FDCWD, link.as_ptr(), 0) })?;
1892 }
1893 }
1894 Ok(())
1895 })
1896 })
1897}
1898
1899pub fn stat(p: &Path) -> io::Result<FileAttr> {
1900 run_path_with_cstr(p, &|p| {
1901 cfg_has_statx! {
1902 if let Some(ret) = unsafe { try_statx(
1903 libc::AT_FDCWD,
1904 p.as_ptr(),
1905 libc::AT_STATX_SYNC_AS_STAT,
1906 libc::STATX_BASIC_STATS | libc::STATX_BTIME,
1907 ) } {
1908 return ret;
1909 }
1910 }
1911
1912 let mut stat: stat64 = unsafe { mem::zeroed() };
1913 cvt(unsafe { stat64(p.as_ptr(), &mut stat) })?;
1914 Ok(FileAttr::from_stat64(stat))
1915 })
1916}
1917
1918pub fn lstat(p: &Path) -> io::Result<FileAttr> {
1919 run_path_with_cstr(p, &|p| {
1920 cfg_has_statx! {
1921 if let Some(ret) = unsafe { try_statx(
1922 libc::AT_FDCWD,
1923 p.as_ptr(),
1924 libc::AT_SYMLINK_NOFOLLOW | libc::AT_STATX_SYNC_AS_STAT,
1925 libc::STATX_BASIC_STATS | libc::STATX_BTIME,
1926 ) } {
1927 return ret;
1928 }
1929 }
1930
1931 let mut stat: stat64 = unsafe { mem::zeroed() };
1932 cvt(unsafe { lstat64(p.as_ptr(), &mut stat) })?;
1933 Ok(FileAttr::from_stat64(stat))
1934 })
1935}
1936
1937pub fn canonicalize(p: &Path) -> io::Result<PathBuf> {
1938 let r = run_path_with_cstr(p, &|path| unsafe {
1939 Ok(libc::realpath(path.as_ptr(), ptr::null_mut()))
1940 })?;
1941 if r.is_null() {
1942 return Err(io::Error::last_os_error());
1943 }
1944 Ok(PathBuf::from(OsString::from_vec(unsafe {
1945 let buf = CStr::from_ptr(r).to_bytes().to_vec();
1946 libc::free(r as *mut _);
1947 buf
1948 })))
1949}
1950
1951fn open_from(from: &Path) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
1952 use crate::fs::File;
1953 use crate::sys::fs::common::NOT_FILE_ERROR;
1954
1955 let reader = File::open(from)?;
1956 let metadata = reader.metadata()?;
1957 if !metadata.is_file() {
1958 return Err(NOT_FILE_ERROR);
1959 }
1960 Ok((reader, metadata))
1961}
1962
1963#[cfg(target_os = "espidf")]
1964fn open_to_and_set_permissions(
1965 to: &Path,
1966 _reader_metadata: &crate::fs::Metadata,
1967) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
1968 use crate::fs::OpenOptions;
1969 let writer = OpenOptions::new().open(to)?;
1970 let writer_metadata = writer.metadata()?;
1971 Ok((writer, writer_metadata))
1972}
1973
1974#[cfg(not(target_os = "espidf"))]
1975fn open_to_and_set_permissions(
1976 to: &Path,
1977 reader_metadata: &crate::fs::Metadata,
1978) -> io::Result<(crate::fs::File, crate::fs::Metadata)> {
1979 use crate::fs::OpenOptions;
1980 use crate::os::unix::fs::{OpenOptionsExt, PermissionsExt};
1981
1982 let perm = reader_metadata.permissions();
1983 let writer = OpenOptions::new()
1984 .mode(perm.mode())
1986 .write(true)
1987 .create(true)
1988 .truncate(true)
1989 .open(to)?;
1990 let writer_metadata = writer.metadata()?;
1991 #[cfg(not(target_os = "vita"))]
1993 if writer_metadata.is_file() {
1994 writer.set_permissions(perm)?;
1998 }
1999 Ok((writer, writer_metadata))
2000}
2001
2002mod cfm {
2003 use crate::fs::{File, Metadata};
2004 use crate::io::{BorrowedCursor, IoSlice, IoSliceMut, Read, Result, Write};
2005
2006 #[allow(dead_code)]
2007 pub struct CachedFileMetadata(pub File, pub Metadata);
2008
2009 impl Read for CachedFileMetadata {
2010 fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
2011 self.0.read(buf)
2012 }
2013 fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize> {
2014 self.0.read_vectored(bufs)
2015 }
2016 fn read_buf(&mut self, cursor: BorrowedCursor<'_>) -> Result<()> {
2017 self.0.read_buf(cursor)
2018 }
2019 #[inline]
2020 fn is_read_vectored(&self) -> bool {
2021 self.0.is_read_vectored()
2022 }
2023 fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize> {
2024 self.0.read_to_end(buf)
2025 }
2026 fn read_to_string(&mut self, buf: &mut String) -> Result<usize> {
2027 self.0.read_to_string(buf)
2028 }
2029 }
2030 impl Write for CachedFileMetadata {
2031 fn write(&mut self, buf: &[u8]) -> Result<usize> {
2032 self.0.write(buf)
2033 }
2034 fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize> {
2035 self.0.write_vectored(bufs)
2036 }
2037 #[inline]
2038 fn is_write_vectored(&self) -> bool {
2039 self.0.is_write_vectored()
2040 }
2041 #[inline]
2042 fn flush(&mut self) -> Result<()> {
2043 self.0.flush()
2044 }
2045 }
2046}
2047#[cfg(any(target_os = "linux", target_os = "android"))]
2048pub(crate) use cfm::CachedFileMetadata;
2049
2050#[cfg(not(target_vendor = "apple"))]
2051pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
2052 let (reader, reader_metadata) = open_from(from)?;
2053 let (writer, writer_metadata) = open_to_and_set_permissions(to, &reader_metadata)?;
2054
2055 io::copy(
2056 &mut cfm::CachedFileMetadata(reader, reader_metadata),
2057 &mut cfm::CachedFileMetadata(writer, writer_metadata),
2058 )
2059}
2060
2061#[cfg(target_vendor = "apple")]
2062pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
2063 const COPYFILE_ALL: libc::copyfile_flags_t = libc::COPYFILE_METADATA | libc::COPYFILE_DATA;
2064
2065 struct FreeOnDrop(libc::copyfile_state_t);
2066 impl Drop for FreeOnDrop {
2067 fn drop(&mut self) {
2068 unsafe {
2070 libc::copyfile_state_free(self.0);
2073 }
2074 }
2075 }
2076
2077 let (reader, reader_metadata) = open_from(from)?;
2078
2079 let clonefile_result = run_path_with_cstr(to, &|to| {
2080 cvt(unsafe { libc::fclonefileat(reader.as_raw_fd(), libc::AT_FDCWD, to.as_ptr(), 0) })
2081 });
2082 match clonefile_result {
2083 Ok(_) => return Ok(reader_metadata.len()),
2084 Err(e) => match e.raw_os_error() {
2085 Some(libc::ENOTSUP) | Some(libc::EEXIST) | Some(libc::EXDEV) => (),
2090 _ => return Err(e),
2091 },
2092 }
2093
2094 let (writer, writer_metadata) = open_to_and_set_permissions(to, &reader_metadata)?;
2096
2097 let state = unsafe {
2100 let state = libc::copyfile_state_alloc();
2101 if state.is_null() {
2102 return Err(crate::io::Error::last_os_error());
2103 }
2104 FreeOnDrop(state)
2105 };
2106
2107 let flags = if writer_metadata.is_file() { COPYFILE_ALL } else { libc::COPYFILE_DATA };
2108
2109 cvt(unsafe { libc::fcopyfile(reader.as_raw_fd(), writer.as_raw_fd(), state.0, flags) })?;
2110
2111 let mut bytes_copied: libc::off_t = 0;
2112 cvt(unsafe {
2113 libc::copyfile_state_get(
2114 state.0,
2115 libc::COPYFILE_STATE_COPIED as u32,
2116 (&raw mut bytes_copied) as *mut libc::c_void,
2117 )
2118 })?;
2119 Ok(bytes_copied as u64)
2120}
2121
2122pub fn chown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
2123 run_path_with_cstr(path, &|path| {
2124 cvt(unsafe { libc::chown(path.as_ptr(), uid as libc::uid_t, gid as libc::gid_t) })
2125 .map(|_| ())
2126 })
2127}
2128
2129pub fn fchown(fd: c_int, uid: u32, gid: u32) -> io::Result<()> {
2130 cvt(unsafe { libc::fchown(fd, uid as libc::uid_t, gid as libc::gid_t) })?;
2131 Ok(())
2132}
2133
2134#[cfg(not(target_os = "vxworks"))]
2135pub fn lchown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
2136 run_path_with_cstr(path, &|path| {
2137 cvt(unsafe { libc::lchown(path.as_ptr(), uid as libc::uid_t, gid as libc::gid_t) })
2138 .map(|_| ())
2139 })
2140}
2141
2142#[cfg(target_os = "vxworks")]
2143pub fn lchown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
2144 let (_, _, _) = (path, uid, gid);
2145 Err(io::const_error!(io::ErrorKind::Unsupported, "lchown not supported by vxworks"))
2146}
2147
2148#[cfg(not(any(target_os = "fuchsia", target_os = "vxworks")))]
2149pub fn chroot(dir: &Path) -> io::Result<()> {
2150 run_path_with_cstr(dir, &|dir| cvt(unsafe { libc::chroot(dir.as_ptr()) }).map(|_| ()))
2151}
2152
2153#[cfg(target_os = "vxworks")]
2154pub fn chroot(dir: &Path) -> io::Result<()> {
2155 let _ = dir;
2156 Err(io::const_error!(io::ErrorKind::Unsupported, "chroot not supported by vxworks"))
2157}
2158
2159pub use remove_dir_impl::remove_dir_all;
2160
2161#[cfg(any(
2163 target_os = "redox",
2164 target_os = "espidf",
2165 target_os = "horizon",
2166 target_os = "vita",
2167 target_os = "nto",
2168 target_os = "vxworks",
2169 miri
2170))]
2171mod remove_dir_impl {
2172 pub use crate::sys::fs::common::remove_dir_all;
2173}
2174
2175#[cfg(not(any(
2177 target_os = "redox",
2178 target_os = "espidf",
2179 target_os = "horizon",
2180 target_os = "vita",
2181 target_os = "nto",
2182 target_os = "vxworks",
2183 miri
2184)))]
2185mod remove_dir_impl {
2186 #[cfg(not(all(target_os = "linux", target_env = "gnu")))]
2187 use libc::{fdopendir, openat, unlinkat};
2188 #[cfg(all(target_os = "linux", target_env = "gnu"))]
2189 use libc::{fdopendir, openat64 as openat, unlinkat};
2190
2191 use super::{Dir, DirEntry, InnerReadDir, ReadDir, lstat};
2192 use crate::ffi::CStr;
2193 use crate::io;
2194 use crate::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd};
2195 use crate::os::unix::prelude::{OwnedFd, RawFd};
2196 use crate::path::{Path, PathBuf};
2197 use crate::sys::common::small_c_string::run_path_with_cstr;
2198 use crate::sys::{cvt, cvt_r};
2199 use crate::sys_common::ignore_notfound;
2200
2201 pub fn openat_nofollow_dironly(parent_fd: Option<RawFd>, p: &CStr) -> io::Result<OwnedFd> {
2202 let fd = cvt_r(|| unsafe {
2203 openat(
2204 parent_fd.unwrap_or(libc::AT_FDCWD),
2205 p.as_ptr(),
2206 libc::O_CLOEXEC | libc::O_RDONLY | libc::O_NOFOLLOW | libc::O_DIRECTORY,
2207 )
2208 })?;
2209 Ok(unsafe { OwnedFd::from_raw_fd(fd) })
2210 }
2211
2212 fn fdreaddir(dir_fd: OwnedFd) -> io::Result<(ReadDir, RawFd)> {
2213 let ptr = unsafe { fdopendir(dir_fd.as_raw_fd()) };
2214 if ptr.is_null() {
2215 return Err(io::Error::last_os_error());
2216 }
2217 let dirp = Dir(ptr);
2218 let new_parent_fd = dir_fd.into_raw_fd();
2220 let dummy_root = PathBuf::new();
2223 let inner = InnerReadDir { dirp, root: dummy_root };
2224 Ok((ReadDir::new(inner), new_parent_fd))
2225 }
2226
2227 #[cfg(any(
2228 target_os = "solaris",
2229 target_os = "illumos",
2230 target_os = "haiku",
2231 target_os = "vxworks",
2232 target_os = "aix",
2233 ))]
2234 fn is_dir(_ent: &DirEntry) -> Option<bool> {
2235 None
2236 }
2237
2238 #[cfg(not(any(
2239 target_os = "solaris",
2240 target_os = "illumos",
2241 target_os = "haiku",
2242 target_os = "vxworks",
2243 target_os = "aix",
2244 )))]
2245 fn is_dir(ent: &DirEntry) -> Option<bool> {
2246 match ent.entry.d_type {
2247 libc::DT_UNKNOWN => None,
2248 libc::DT_DIR => Some(true),
2249 _ => Some(false),
2250 }
2251 }
2252
2253 fn is_enoent(result: &io::Result<()>) -> bool {
2254 if let Err(err) = result
2255 && matches!(err.raw_os_error(), Some(libc::ENOENT))
2256 {
2257 true
2258 } else {
2259 false
2260 }
2261 }
2262
2263 fn remove_dir_all_recursive(parent_fd: Option<RawFd>, path: &CStr) -> io::Result<()> {
2264 let fd = match openat_nofollow_dironly(parent_fd, &path) {
2266 Err(err) if matches!(err.raw_os_error(), Some(libc::ENOTDIR | libc::ELOOP)) => {
2267 return match parent_fd {
2270 Some(parent_fd) => {
2272 cvt(unsafe { unlinkat(parent_fd, path.as_ptr(), 0) }).map(drop)
2273 }
2274 None => Err(err),
2276 };
2277 }
2278 result => result?,
2279 };
2280
2281 let (dir, fd) = fdreaddir(fd)?;
2283 for child in dir {
2284 let child = child?;
2285 let child_name = child.name_cstr();
2286 let result: io::Result<()> = try {
2290 match is_dir(&child) {
2291 Some(true) => {
2292 remove_dir_all_recursive(Some(fd), child_name)?;
2293 }
2294 Some(false) => {
2295 cvt(unsafe { unlinkat(fd, child_name.as_ptr(), 0) })?;
2296 }
2297 None => {
2298 remove_dir_all_recursive(Some(fd), child_name)?;
2303 }
2304 }
2305 };
2306 if result.is_err() && !is_enoent(&result) {
2307 return result;
2308 }
2309 }
2310
2311 ignore_notfound(cvt(unsafe {
2313 unlinkat(parent_fd.unwrap_or(libc::AT_FDCWD), path.as_ptr(), libc::AT_REMOVEDIR)
2314 }))?;
2315 Ok(())
2316 }
2317
2318 fn remove_dir_all_modern(p: &Path) -> io::Result<()> {
2319 let attr = lstat(p)?;
2323 if attr.file_type().is_symlink() {
2324 crate::fs::remove_file(p)
2325 } else {
2326 run_path_with_cstr(p, &|p| remove_dir_all_recursive(None, &p))
2327 }
2328 }
2329
2330 pub fn remove_dir_all(p: &Path) -> io::Result<()> {
2331 remove_dir_all_modern(p)
2332 }
2333}