1#![allow(nonstandard_style)]
2
3use crate::alloc::{Layout, alloc, dealloc};
4use crate::borrow::Cow;
5use crate::ffi::{OsStr, OsString, c_void};
6use crate::fs::TryLockError;
7use crate::io::{self, BorrowedCursor, Error, IoSlice, IoSliceMut, SeekFrom};
8use crate::mem::{self, MaybeUninit, offset_of};
9use crate::os::windows::io::{AsHandle, BorrowedHandle};
10use crate::os::windows::prelude::*;
11use crate::path::{Path, PathBuf};
12use crate::sync::Arc;
13use crate::sys::handle::Handle;
14use crate::sys::pal::api::{self, WinError, set_file_information_by_handle};
15use crate::sys::pal::{IoResult, fill_utf16_buf, to_u16s, truncate_utf16_at_nul};
16use crate::sys::path::{WCStr, maybe_verbatim};
17use crate::sys::time::SystemTime;
18use crate::sys::{Align8, c, cvt};
19use crate::sys_common::{AsInner, FromInner, IntoInner};
20use crate::{fmt, ptr, slice};
21
22mod remove_dir_all;
23use remove_dir_all::remove_dir_all_iterative;
24
25pub struct File {
26 handle: Handle,
27}
28
29#[derive(Clone)]
30pub struct FileAttr {
31 attributes: u32,
32 creation_time: c::FILETIME,
33 last_access_time: c::FILETIME,
34 last_write_time: c::FILETIME,
35 change_time: Option<c::FILETIME>,
36 file_size: u64,
37 reparse_tag: u32,
38 volume_serial_number: Option<u32>,
39 number_of_links: Option<u32>,
40 file_index: Option<u64>,
41}
42
43#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
44pub struct FileType {
45 is_directory: bool,
46 is_symlink: bool,
47}
48
49pub struct ReadDir {
50 handle: Option<FindNextFileHandle>,
51 root: Arc<PathBuf>,
52 first: Option<c::WIN32_FIND_DATAW>,
53}
54
55struct FindNextFileHandle(c::HANDLE);
56
57unsafe impl Send for FindNextFileHandle {}
58unsafe impl Sync for FindNextFileHandle {}
59
60pub struct DirEntry {
61 root: Arc<PathBuf>,
62 data: c::WIN32_FIND_DATAW,
63}
64
65unsafe impl Send for OpenOptions {}
66unsafe impl Sync for OpenOptions {}
67
68#[derive(Clone, Debug)]
69pub struct OpenOptions {
70 read: bool,
72 write: bool,
73 append: bool,
74 truncate: bool,
75 create: bool,
76 create_new: bool,
77 custom_flags: u32,
79 access_mode: Option<u32>,
80 attributes: u32,
81 share_mode: u32,
82 security_qos_flags: u32,
83 security_attributes: *mut c::SECURITY_ATTRIBUTES,
84}
85
86#[derive(Clone, PartialEq, Eq, Debug)]
87pub struct FilePermissions {
88 attrs: u32,
89}
90
91#[derive(Copy, Clone, Debug, Default)]
92pub struct FileTimes {
93 accessed: Option<c::FILETIME>,
94 modified: Option<c::FILETIME>,
95 created: Option<c::FILETIME>,
96}
97
98impl fmt::Debug for c::FILETIME {
99 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
100 let time = ((self.dwHighDateTime as u64) << 32) | self.dwLowDateTime as u64;
101 f.debug_tuple("FILETIME").field(&time).finish()
102 }
103}
104
105#[derive(Debug)]
106pub struct DirBuilder;
107
108impl fmt::Debug for ReadDir {
109 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
110 fmt::Debug::fmt(&*self.root, f)
113 }
114}
115
116impl Iterator for ReadDir {
117 type Item = io::Result<DirEntry>;
118 fn next(&mut self) -> Option<io::Result<DirEntry>> {
119 let Some(handle) = self.handle.as_ref() else {
120 return None;
125 };
126 if let Some(first) = self.first.take() {
127 if let Some(e) = DirEntry::new(&self.root, &first) {
128 return Some(Ok(e));
129 }
130 }
131 unsafe {
132 let mut wfd = mem::zeroed();
133 loop {
134 if c::FindNextFileW(handle.0, &mut wfd) == 0 {
135 match api::get_last_error() {
136 WinError::NO_MORE_FILES => return None,
137 WinError { code } => {
138 return Some(Err(Error::from_raw_os_error(code as i32)));
139 }
140 }
141 }
142 if let Some(e) = DirEntry::new(&self.root, &wfd) {
143 return Some(Ok(e));
144 }
145 }
146 }
147 }
148}
149
150impl Drop for FindNextFileHandle {
151 fn drop(&mut self) {
152 let r = unsafe { c::FindClose(self.0) };
153 debug_assert!(r != 0);
154 }
155}
156
157impl DirEntry {
158 fn new(root: &Arc<PathBuf>, wfd: &c::WIN32_FIND_DATAW) -> Option<DirEntry> {
159 match &wfd.cFileName[0..3] {
160 &[46, 0, ..] | &[46, 46, 0, ..] => return None,
162 _ => {}
163 }
164
165 Some(DirEntry { root: root.clone(), data: *wfd })
166 }
167
168 pub fn path(&self) -> PathBuf {
169 self.root.join(self.file_name())
170 }
171
172 pub fn file_name(&self) -> OsString {
173 let filename = truncate_utf16_at_nul(&self.data.cFileName);
174 OsString::from_wide(filename)
175 }
176
177 pub fn file_type(&self) -> io::Result<FileType> {
178 Ok(FileType::new(
179 self.data.dwFileAttributes,
180 self.data.dwReserved0,
181 ))
182 }
183
184 pub fn metadata(&self) -> io::Result<FileAttr> {
185 Ok(self.data.into())
186 }
187}
188
189impl OpenOptions {
190 pub fn new() -> OpenOptions {
191 OpenOptions {
192 read: false,
194 write: false,
195 append: false,
196 truncate: false,
197 create: false,
198 create_new: false,
199 custom_flags: 0,
201 access_mode: None,
202 share_mode: c::FILE_SHARE_READ | c::FILE_SHARE_WRITE | c::FILE_SHARE_DELETE,
203 attributes: 0,
204 security_qos_flags: 0,
205 security_attributes: ptr::null_mut(),
206 }
207 }
208
209 pub fn read(&mut self, read: bool) {
210 self.read = read;
211 }
212 pub fn write(&mut self, write: bool) {
213 self.write = write;
214 }
215 pub fn append(&mut self, append: bool) {
216 self.append = append;
217 }
218 pub fn truncate(&mut self, truncate: bool) {
219 self.truncate = truncate;
220 }
221 pub fn create(&mut self, create: bool) {
222 self.create = create;
223 }
224 pub fn create_new(&mut self, create_new: bool) {
225 self.create_new = create_new;
226 }
227
228 pub fn custom_flags(&mut self, flags: u32) {
229 self.custom_flags = flags;
230 }
231 pub fn access_mode(&mut self, access_mode: u32) {
232 self.access_mode = Some(access_mode);
233 }
234 pub fn share_mode(&mut self, share_mode: u32) {
235 self.share_mode = share_mode;
236 }
237 pub fn attributes(&mut self, attrs: u32) {
238 self.attributes = attrs;
239 }
240 pub fn security_qos_flags(&mut self, flags: u32) {
241 self.security_qos_flags = flags | c::SECURITY_SQOS_PRESENT;
244 }
245 pub fn security_attributes(&mut self, attrs: *mut c::SECURITY_ATTRIBUTES) {
246 self.security_attributes = attrs;
247 }
248
249 fn get_access_mode(&self) -> io::Result<u32> {
250 match (self.read, self.write, self.append, self.access_mode) {
251 (.., Some(mode)) => Ok(mode),
252 (true, false, false, None) => Ok(c::GENERIC_READ),
253 (false, true, false, None) => Ok(c::GENERIC_WRITE),
254 (true, true, false, None) => Ok(c::GENERIC_READ | c::GENERIC_WRITE),
255 (false, _, true, None) => Ok(c::FILE_GENERIC_WRITE & !c::FILE_WRITE_DATA),
256 (true, _, true, None) => {
257 Ok(c::GENERIC_READ | (c::FILE_GENERIC_WRITE & !c::FILE_WRITE_DATA))
258 }
259 (false, false, false, None) => {
260 Err(Error::from_raw_os_error(c::ERROR_INVALID_PARAMETER as i32))
261 }
262 }
263 }
264
265 fn get_creation_mode(&self) -> io::Result<u32> {
266 match (self.write, self.append) {
267 (true, false) => {}
268 (false, false) => {
269 if self.truncate || self.create || self.create_new {
270 return Err(Error::from_raw_os_error(c::ERROR_INVALID_PARAMETER as i32));
271 }
272 }
273 (_, true) => {
274 if self.truncate && !self.create_new {
275 return Err(Error::from_raw_os_error(c::ERROR_INVALID_PARAMETER as i32));
276 }
277 }
278 }
279
280 Ok(match (self.create, self.truncate, self.create_new) {
281 (false, false, false) => c::OPEN_EXISTING,
282 (true, false, false) => c::OPEN_ALWAYS,
283 (false, true, false) => c::TRUNCATE_EXISTING,
284 (true, true, false) => c::OPEN_ALWAYS,
287 (_, _, true) => c::CREATE_NEW,
288 })
289 }
290
291 fn get_flags_and_attributes(&self) -> u32 {
292 self.custom_flags
293 | self.attributes
294 | self.security_qos_flags
295 | if self.create_new { c::FILE_FLAG_OPEN_REPARSE_POINT } else { 0 }
296 }
297}
298
299impl File {
300 pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
301 let path = maybe_verbatim(path)?;
302 let path = unsafe { WCStr::from_wchars_with_null_unchecked(&path) };
304 Self::open_native(&path, opts)
305 }
306
307 fn open_native(path: &WCStr, opts: &OpenOptions) -> io::Result<File> {
308 let creation = opts.get_creation_mode()?;
309 let handle = unsafe {
310 c::CreateFileW(
311 path.as_ptr(),
312 opts.get_access_mode()?,
313 opts.share_mode,
314 opts.security_attributes,
315 creation,
316 opts.get_flags_and_attributes(),
317 ptr::null_mut(),
318 )
319 };
320 let handle = unsafe { HandleOrInvalid::from_raw_handle(handle) };
321 if let Ok(handle) = OwnedHandle::try_from(handle) {
322 if opts.truncate
324 && creation == c::OPEN_ALWAYS
325 && api::get_last_error() == WinError::ALREADY_EXISTS
326 {
327 let alloc = c::FILE_ALLOCATION_INFO { AllocationSize: 0 };
332 set_file_information_by_handle(handle.as_raw_handle(), &alloc)
333 .or_else(|_| {
334 let eof = c::FILE_END_OF_FILE_INFO { EndOfFile: 0 };
335 set_file_information_by_handle(handle.as_raw_handle(), &eof)
336 })
337 .io_result()?;
338 }
339 Ok(File { handle: Handle::from_inner(handle) })
340 } else {
341 Err(Error::last_os_error())
342 }
343 }
344
345 pub fn fsync(&self) -> io::Result<()> {
346 cvt(unsafe { c::FlushFileBuffers(self.handle.as_raw_handle()) })?;
347 Ok(())
348 }
349
350 pub fn datasync(&self) -> io::Result<()> {
351 self.fsync()
352 }
353
354 fn acquire_lock(&self, flags: c::LOCK_FILE_FLAGS) -> io::Result<()> {
355 unsafe {
356 let mut overlapped: c::OVERLAPPED = mem::zeroed();
357 let event = c::CreateEventW(ptr::null_mut(), c::FALSE, c::FALSE, ptr::null());
358 if event.is_null() {
359 return Err(io::Error::last_os_error());
360 }
361 overlapped.hEvent = event;
362 let lock_result = cvt(c::LockFileEx(
363 self.handle.as_raw_handle(),
364 flags,
365 0,
366 u32::MAX,
367 u32::MAX,
368 &mut overlapped,
369 ));
370
371 let final_result = match lock_result {
372 Ok(_) => Ok(()),
373 Err(err) => {
374 if err.raw_os_error() == Some(c::ERROR_IO_PENDING as i32) {
375 let mut bytes_transferred = 0;
378 cvt(c::GetOverlappedResult(
379 self.handle.as_raw_handle(),
380 &mut overlapped,
381 &mut bytes_transferred,
382 c::TRUE,
383 ))
384 .map(|_| ())
385 } else {
386 Err(err)
387 }
388 }
389 };
390 c::CloseHandle(overlapped.hEvent);
391 final_result
392 }
393 }
394
395 pub fn lock(&self) -> io::Result<()> {
396 self.acquire_lock(c::LOCKFILE_EXCLUSIVE_LOCK)
397 }
398
399 pub fn lock_shared(&self) -> io::Result<()> {
400 self.acquire_lock(0)
401 }
402
403 pub fn try_lock(&self) -> Result<(), TryLockError> {
404 let result = cvt(unsafe {
405 let mut overlapped = mem::zeroed();
406 c::LockFileEx(
407 self.handle.as_raw_handle(),
408 c::LOCKFILE_EXCLUSIVE_LOCK | c::LOCKFILE_FAIL_IMMEDIATELY,
409 0,
410 u32::MAX,
411 u32::MAX,
412 &mut overlapped,
413 )
414 });
415
416 match result {
417 Ok(_) => Ok(()),
418 Err(err)
419 if err.raw_os_error() == Some(c::ERROR_IO_PENDING as i32)
420 || err.raw_os_error() == Some(c::ERROR_LOCK_VIOLATION as i32) =>
421 {
422 Err(TryLockError::WouldBlock)
423 }
424 Err(err) => Err(TryLockError::Error(err)),
425 }
426 }
427
428 pub fn try_lock_shared(&self) -> Result<(), TryLockError> {
429 let result = cvt(unsafe {
430 let mut overlapped = mem::zeroed();
431 c::LockFileEx(
432 self.handle.as_raw_handle(),
433 c::LOCKFILE_FAIL_IMMEDIATELY,
434 0,
435 u32::MAX,
436 u32::MAX,
437 &mut overlapped,
438 )
439 });
440
441 match result {
442 Ok(_) => Ok(()),
443 Err(err)
444 if err.raw_os_error() == Some(c::ERROR_IO_PENDING as i32)
445 || err.raw_os_error() == Some(c::ERROR_LOCK_VIOLATION as i32) =>
446 {
447 Err(TryLockError::WouldBlock)
448 }
449 Err(err) => Err(TryLockError::Error(err)),
450 }
451 }
452
453 pub fn unlock(&self) -> io::Result<()> {
454 cvt(unsafe { c::UnlockFile(self.handle.as_raw_handle(), 0, 0, u32::MAX, u32::MAX) })?;
459 let result =
460 cvt(unsafe { c::UnlockFile(self.handle.as_raw_handle(), 0, 0, u32::MAX, u32::MAX) });
461 match result {
462 Ok(_) => Ok(()),
463 Err(err) if err.raw_os_error() == Some(c::ERROR_NOT_LOCKED as i32) => Ok(()),
464 Err(err) => Err(err),
465 }
466 }
467
468 pub fn truncate(&self, size: u64) -> io::Result<()> {
469 let info = c::FILE_END_OF_FILE_INFO { EndOfFile: size as i64 };
470 api::set_file_information_by_handle(self.handle.as_raw_handle(), &info).io_result()
471 }
472
473 #[cfg(not(target_vendor = "uwp"))]
474 pub fn file_attr(&self) -> io::Result<FileAttr> {
475 unsafe {
476 let mut info: c::BY_HANDLE_FILE_INFORMATION = mem::zeroed();
477 cvt(c::GetFileInformationByHandle(self.handle.as_raw_handle(), &mut info))?;
478 let mut reparse_tag = 0;
479 if info.dwFileAttributes & c::FILE_ATTRIBUTE_REPARSE_POINT != 0 {
480 let mut attr_tag: c::FILE_ATTRIBUTE_TAG_INFO = mem::zeroed();
481 cvt(c::GetFileInformationByHandleEx(
482 self.handle.as_raw_handle(),
483 c::FileAttributeTagInfo,
484 (&raw mut attr_tag).cast(),
485 size_of::<c::FILE_ATTRIBUTE_TAG_INFO>().try_into().unwrap(),
486 ))?;
487 if attr_tag.FileAttributes & c::FILE_ATTRIBUTE_REPARSE_POINT != 0 {
488 reparse_tag = attr_tag.ReparseTag;
489 }
490 }
491 Ok(FileAttr {
492 attributes: info.dwFileAttributes,
493 creation_time: info.ftCreationTime,
494 last_access_time: info.ftLastAccessTime,
495 last_write_time: info.ftLastWriteTime,
496 change_time: None, file_size: (info.nFileSizeLow as u64) | ((info.nFileSizeHigh as u64) << 32),
498 reparse_tag,
499 volume_serial_number: Some(info.dwVolumeSerialNumber),
500 number_of_links: Some(info.nNumberOfLinks),
501 file_index: Some(
502 (info.nFileIndexLow as u64) | ((info.nFileIndexHigh as u64) << 32),
503 ),
504 })
505 }
506 }
507
508 #[cfg(target_vendor = "uwp")]
509 pub fn file_attr(&self) -> io::Result<FileAttr> {
510 unsafe {
511 let mut info: c::FILE_BASIC_INFO = mem::zeroed();
512 let size = size_of_val(&info);
513 cvt(c::GetFileInformationByHandleEx(
514 self.handle.as_raw_handle(),
515 c::FileBasicInfo,
516 (&raw mut info) as *mut c_void,
517 size as u32,
518 ))?;
519 let mut attr = FileAttr {
520 attributes: info.FileAttributes,
521 creation_time: c::FILETIME {
522 dwLowDateTime: info.CreationTime as u32,
523 dwHighDateTime: (info.CreationTime >> 32) as u32,
524 },
525 last_access_time: c::FILETIME {
526 dwLowDateTime: info.LastAccessTime as u32,
527 dwHighDateTime: (info.LastAccessTime >> 32) as u32,
528 },
529 last_write_time: c::FILETIME {
530 dwLowDateTime: info.LastWriteTime as u32,
531 dwHighDateTime: (info.LastWriteTime >> 32) as u32,
532 },
533 change_time: Some(c::FILETIME {
534 dwLowDateTime: info.ChangeTime as u32,
535 dwHighDateTime: (info.ChangeTime >> 32) as u32,
536 }),
537 file_size: 0,
538 reparse_tag: 0,
539 volume_serial_number: None,
540 number_of_links: None,
541 file_index: None,
542 };
543 let mut info: c::FILE_STANDARD_INFO = mem::zeroed();
544 let size = size_of_val(&info);
545 cvt(c::GetFileInformationByHandleEx(
546 self.handle.as_raw_handle(),
547 c::FileStandardInfo,
548 (&raw mut info) as *mut c_void,
549 size as u32,
550 ))?;
551 attr.file_size = info.AllocationSize as u64;
552 attr.number_of_links = Some(info.NumberOfLinks);
553 if attr.attributes & c::FILE_ATTRIBUTE_REPARSE_POINT != 0 {
554 let mut attr_tag: c::FILE_ATTRIBUTE_TAG_INFO = mem::zeroed();
555 cvt(c::GetFileInformationByHandleEx(
556 self.handle.as_raw_handle(),
557 c::FileAttributeTagInfo,
558 (&raw mut attr_tag).cast(),
559 size_of::<c::FILE_ATTRIBUTE_TAG_INFO>().try_into().unwrap(),
560 ))?;
561 if attr_tag.FileAttributes & c::FILE_ATTRIBUTE_REPARSE_POINT != 0 {
562 attr.reparse_tag = attr_tag.ReparseTag;
563 }
564 }
565 Ok(attr)
566 }
567 }
568
569 pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
570 self.handle.read(buf)
571 }
572
573 pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
574 self.handle.read_vectored(bufs)
575 }
576
577 #[inline]
578 pub fn is_read_vectored(&self) -> bool {
579 self.handle.is_read_vectored()
580 }
581
582 pub fn read_at(&self, buf: &mut [u8], offset: u64) -> io::Result<usize> {
583 self.handle.read_at(buf, offset)
584 }
585
586 pub fn read_buf(&self, cursor: BorrowedCursor<'_>) -> io::Result<()> {
587 self.handle.read_buf(cursor)
588 }
589
590 pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
591 self.handle.write(buf)
592 }
593
594 pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
595 self.handle.write_vectored(bufs)
596 }
597
598 #[inline]
599 pub fn is_write_vectored(&self) -> bool {
600 self.handle.is_write_vectored()
601 }
602
603 pub fn write_at(&self, buf: &[u8], offset: u64) -> io::Result<usize> {
604 self.handle.write_at(buf, offset)
605 }
606
607 pub fn flush(&self) -> io::Result<()> {
608 Ok(())
609 }
610
611 pub fn seek(&self, pos: SeekFrom) -> io::Result<u64> {
612 let (whence, pos) = match pos {
613 SeekFrom::Start(n) => (c::FILE_BEGIN, n as i64),
616 SeekFrom::End(n) => (c::FILE_END, n),
617 SeekFrom::Current(n) => (c::FILE_CURRENT, n),
618 };
619 let pos = pos as i64;
620 let mut newpos = 0;
621 cvt(unsafe { c::SetFilePointerEx(self.handle.as_raw_handle(), pos, &mut newpos, whence) })?;
622 Ok(newpos as u64)
623 }
624
625 pub fn tell(&self) -> io::Result<u64> {
626 self.seek(SeekFrom::Current(0))
627 }
628
629 pub fn duplicate(&self) -> io::Result<File> {
630 Ok(Self { handle: self.handle.try_clone()? })
631 }
632
633 fn reparse_point(
637 &self,
638 space: &mut Align8<[MaybeUninit<u8>]>,
639 ) -> io::Result<(u32, *mut c::REPARSE_DATA_BUFFER)> {
640 unsafe {
641 let mut bytes = 0;
642 cvt({
643 let len = space.0.len();
646 c::DeviceIoControl(
647 self.handle.as_raw_handle(),
648 c::FSCTL_GET_REPARSE_POINT,
649 ptr::null_mut(),
650 0,
651 space.0.as_mut_ptr().cast(),
652 len as u32,
653 &mut bytes,
654 ptr::null_mut(),
655 )
656 })?;
657 const _: () = assert!(align_of::<c::REPARSE_DATA_BUFFER>() <= 8);
658 Ok((bytes, space.0.as_mut_ptr().cast::<c::REPARSE_DATA_BUFFER>()))
659 }
660 }
661
662 fn readlink(&self) -> io::Result<PathBuf> {
663 let mut space =
664 Align8([MaybeUninit::<u8>::uninit(); c::MAXIMUM_REPARSE_DATA_BUFFER_SIZE as usize]);
665 let (_bytes, buf) = self.reparse_point(&mut space)?;
666 unsafe {
667 let (path_buffer, subst_off, subst_len, relative) = match (*buf).ReparseTag {
668 c::IO_REPARSE_TAG_SYMLINK => {
669 let info: *mut c::SYMBOLIC_LINK_REPARSE_BUFFER = (&raw mut (*buf).rest).cast();
670 assert!(info.is_aligned());
671 (
672 (&raw mut (*info).PathBuffer).cast::<u16>(),
673 (*info).SubstituteNameOffset / 2,
674 (*info).SubstituteNameLength / 2,
675 (*info).Flags & c::SYMLINK_FLAG_RELATIVE != 0,
676 )
677 }
678 c::IO_REPARSE_TAG_MOUNT_POINT => {
679 let info: *mut c::MOUNT_POINT_REPARSE_BUFFER = (&raw mut (*buf).rest).cast();
680 assert!(info.is_aligned());
681 (
682 (&raw mut (*info).PathBuffer).cast::<u16>(),
683 (*info).SubstituteNameOffset / 2,
684 (*info).SubstituteNameLength / 2,
685 false,
686 )
687 }
688 _ => {
689 return Err(io::const_error!(
690 io::ErrorKind::Uncategorized,
691 "Unsupported reparse point type",
692 ));
693 }
694 };
695 let subst_ptr = path_buffer.add(subst_off.into());
696 let subst = slice::from_raw_parts_mut(subst_ptr, subst_len as usize);
697 if !relative && subst.starts_with(&[92u16, 63u16, 63u16, 92u16]) {
700 subst[1] = b'\\' as u16;
702 let user = crate::sys::args::from_wide_to_user_path(
704 subst.iter().copied().chain([0]).collect(),
705 )?;
706 Ok(PathBuf::from(OsString::from_wide(user.strip_suffix(&[0]).unwrap_or(&user))))
707 } else {
708 Ok(PathBuf::from(OsString::from_wide(subst)))
709 }
710 }
711 }
712
713 pub fn set_permissions(&self, perm: FilePermissions) -> io::Result<()> {
714 let info = c::FILE_BASIC_INFO {
715 CreationTime: 0,
716 LastAccessTime: 0,
717 LastWriteTime: 0,
718 ChangeTime: 0,
719 FileAttributes: perm.attrs,
720 };
721 api::set_file_information_by_handle(self.handle.as_raw_handle(), &info).io_result()
722 }
723
724 pub fn set_times(&self, times: FileTimes) -> io::Result<()> {
725 let is_zero = |t: c::FILETIME| t.dwLowDateTime == 0 && t.dwHighDateTime == 0;
726 if times.accessed.map_or(false, is_zero)
727 || times.modified.map_or(false, is_zero)
728 || times.created.map_or(false, is_zero)
729 {
730 return Err(io::const_error!(
731 io::ErrorKind::InvalidInput,
732 "cannot set file timestamp to 0",
733 ));
734 }
735 let is_max = |t: c::FILETIME| t.dwLowDateTime == u32::MAX && t.dwHighDateTime == u32::MAX;
736 if times.accessed.map_or(false, is_max)
737 || times.modified.map_or(false, is_max)
738 || times.created.map_or(false, is_max)
739 {
740 return Err(io::const_error!(
741 io::ErrorKind::InvalidInput,
742 "cannot set file timestamp to 0xFFFF_FFFF_FFFF_FFFF",
743 ));
744 }
745 cvt(unsafe {
746 let created =
747 times.created.as_ref().map(|a| a as *const c::FILETIME).unwrap_or(ptr::null());
748 let accessed =
749 times.accessed.as_ref().map(|a| a as *const c::FILETIME).unwrap_or(ptr::null());
750 let modified =
751 times.modified.as_ref().map(|a| a as *const c::FILETIME).unwrap_or(ptr::null());
752 c::SetFileTime(self.as_raw_handle(), created, accessed, modified)
753 })?;
754 Ok(())
755 }
756
757 fn basic_info(&self) -> io::Result<c::FILE_BASIC_INFO> {
759 unsafe {
760 let mut info: c::FILE_BASIC_INFO = mem::zeroed();
761 let size = size_of_val(&info);
762 cvt(c::GetFileInformationByHandleEx(
763 self.handle.as_raw_handle(),
764 c::FileBasicInfo,
765 (&raw mut info) as *mut c_void,
766 size as u32,
767 ))?;
768 Ok(info)
769 }
770 }
771
772 #[allow(unused)]
777 fn delete(self) -> Result<(), WinError> {
778 match self.posix_delete() {
780 Err(WinError::INVALID_PARAMETER)
781 | Err(WinError::NOT_SUPPORTED)
782 | Err(WinError::INVALID_FUNCTION) => self.win32_delete(),
783 result => result,
784 }
785 }
786
787 #[allow(unused)]
796 fn posix_delete(&self) -> Result<(), WinError> {
797 let info = c::FILE_DISPOSITION_INFO_EX {
798 Flags: c::FILE_DISPOSITION_FLAG_DELETE
799 | c::FILE_DISPOSITION_FLAG_POSIX_SEMANTICS
800 | c::FILE_DISPOSITION_FLAG_IGNORE_READONLY_ATTRIBUTE,
801 };
802 api::set_file_information_by_handle(self.handle.as_raw_handle(), &info)
803 }
804
805 #[allow(unused)]
809 fn win32_delete(&self) -> Result<(), WinError> {
810 let info = c::FILE_DISPOSITION_INFO { DeleteFile: true };
811 api::set_file_information_by_handle(self.handle.as_raw_handle(), &info)
812 }
813
814 #[allow(unused)]
828 fn fill_dir_buff(&self, buffer: &mut DirBuff, restart: bool) -> Result<bool, WinError> {
829 let class =
830 if restart { c::FileIdBothDirectoryRestartInfo } else { c::FileIdBothDirectoryInfo };
831
832 unsafe {
833 let result = c::GetFileInformationByHandleEx(
834 self.as_raw_handle(),
835 class,
836 buffer.as_mut_ptr().cast(),
837 buffer.capacity() as _,
838 );
839 if result == 0 {
840 let err = api::get_last_error();
841 if err.code == c::ERROR_NO_MORE_FILES { Ok(false) } else { Err(err) }
842 } else {
843 Ok(true)
844 }
845 }
846 }
847}
848
849struct DirBuff {
851 buffer: Box<Align8<[MaybeUninit<u8>; Self::BUFFER_SIZE]>>,
852}
853impl DirBuff {
854 const BUFFER_SIZE: usize = 1024;
855 fn new() -> Self {
856 Self {
857 buffer: unsafe { Box::new_uninit().assume_init() },
860 }
861 }
862 fn capacity(&self) -> usize {
863 self.buffer.0.len()
864 }
865 fn as_mut_ptr(&mut self) -> *mut u8 {
866 self.buffer.0.as_mut_ptr().cast()
867 }
868 fn iter(&self) -> DirBuffIter<'_> {
870 DirBuffIter::new(self)
871 }
872}
873impl AsRef<[MaybeUninit<u8>]> for DirBuff {
874 fn as_ref(&self) -> &[MaybeUninit<u8>] {
875 &self.buffer.0
876 }
877}
878
879struct DirBuffIter<'a> {
883 buffer: Option<&'a [MaybeUninit<u8>]>,
884 cursor: usize,
885}
886impl<'a> DirBuffIter<'a> {
887 fn new(buffer: &'a DirBuff) -> Self {
888 Self { buffer: Some(buffer.as_ref()), cursor: 0 }
889 }
890}
891impl<'a> Iterator for DirBuffIter<'a> {
892 type Item = (Cow<'a, [u16]>, bool);
893 fn next(&mut self) -> Option<Self::Item> {
894 let buffer = &self.buffer?[self.cursor..];
895
896 let (name, is_directory, next_entry) = unsafe {
905 let info = buffer.as_ptr().cast::<c::FILE_ID_BOTH_DIR_INFO>();
906 let next_entry = (&raw const (*info).NextEntryOffset).read_unaligned() as usize;
912 let length = (&raw const (*info).FileNameLength).read_unaligned() as usize;
913 let attrs = (&raw const (*info).FileAttributes).read_unaligned();
914 let name = from_maybe_unaligned(
915 (&raw const (*info).FileName).cast::<u16>(),
916 length / size_of::<u16>(),
917 );
918 let is_directory = (attrs & c::FILE_ATTRIBUTE_DIRECTORY) != 0;
919
920 (name, is_directory, next_entry)
921 };
922
923 if next_entry == 0 {
924 self.buffer = None
925 } else {
926 self.cursor += next_entry
927 }
928
929 const DOT: u16 = b'.' as u16;
931 match &name[..] {
932 [DOT] | [DOT, DOT] => self.next(),
933 _ => Some((name, is_directory)),
934 }
935 }
936}
937
938unsafe fn from_maybe_unaligned<'a>(p: *const u16, len: usize) -> Cow<'a, [u16]> {
939 unsafe {
940 if p.is_aligned() {
941 Cow::Borrowed(crate::slice::from_raw_parts(p, len))
942 } else {
943 Cow::Owned((0..len).map(|i| p.add(i).read_unaligned()).collect())
944 }
945 }
946}
947
948impl AsInner<Handle> for File {
949 #[inline]
950 fn as_inner(&self) -> &Handle {
951 &self.handle
952 }
953}
954
955impl IntoInner<Handle> for File {
956 fn into_inner(self) -> Handle {
957 self.handle
958 }
959}
960
961impl FromInner<Handle> for File {
962 fn from_inner(handle: Handle) -> File {
963 File { handle }
964 }
965}
966
967impl AsHandle for File {
968 fn as_handle(&self) -> BorrowedHandle<'_> {
969 self.as_inner().as_handle()
970 }
971}
972
973impl AsRawHandle for File {
974 fn as_raw_handle(&self) -> RawHandle {
975 self.as_inner().as_raw_handle()
976 }
977}
978
979impl IntoRawHandle for File {
980 fn into_raw_handle(self) -> RawHandle {
981 self.into_inner().into_raw_handle()
982 }
983}
984
985impl FromRawHandle for File {
986 unsafe fn from_raw_handle(raw_handle: RawHandle) -> Self {
987 unsafe {
988 Self { handle: FromInner::from_inner(FromRawHandle::from_raw_handle(raw_handle)) }
989 }
990 }
991}
992
993impl fmt::Debug for File {
994 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
995 let mut b = f.debug_struct("File");
997 b.field("handle", &self.handle.as_raw_handle());
998 if let Ok(path) = get_path(self) {
999 b.field("path", &path);
1000 }
1001 b.finish()
1002 }
1003}
1004
1005impl FileAttr {
1006 pub fn size(&self) -> u64 {
1007 self.file_size
1008 }
1009
1010 pub fn perm(&self) -> FilePermissions {
1011 FilePermissions { attrs: self.attributes }
1012 }
1013
1014 pub fn attrs(&self) -> u32 {
1015 self.attributes
1016 }
1017
1018 pub fn file_type(&self) -> FileType {
1019 FileType::new(self.attributes, self.reparse_tag)
1020 }
1021
1022 pub fn modified(&self) -> io::Result<SystemTime> {
1023 Ok(SystemTime::from(self.last_write_time))
1024 }
1025
1026 pub fn accessed(&self) -> io::Result<SystemTime> {
1027 Ok(SystemTime::from(self.last_access_time))
1028 }
1029
1030 pub fn created(&self) -> io::Result<SystemTime> {
1031 Ok(SystemTime::from(self.creation_time))
1032 }
1033
1034 pub fn modified_u64(&self) -> u64 {
1035 to_u64(&self.last_write_time)
1036 }
1037
1038 pub fn accessed_u64(&self) -> u64 {
1039 to_u64(&self.last_access_time)
1040 }
1041
1042 pub fn created_u64(&self) -> u64 {
1043 to_u64(&self.creation_time)
1044 }
1045
1046 pub fn changed_u64(&self) -> Option<u64> {
1047 self.change_time.as_ref().map(|c| to_u64(c))
1048 }
1049
1050 pub fn volume_serial_number(&self) -> Option<u32> {
1051 self.volume_serial_number
1052 }
1053
1054 pub fn number_of_links(&self) -> Option<u32> {
1055 self.number_of_links
1056 }
1057
1058 pub fn file_index(&self) -> Option<u64> {
1059 self.file_index
1060 }
1061}
1062impl From<c::WIN32_FIND_DATAW> for FileAttr {
1063 fn from(wfd: c::WIN32_FIND_DATAW) -> Self {
1064 FileAttr {
1065 attributes: wfd.dwFileAttributes,
1066 creation_time: wfd.ftCreationTime,
1067 last_access_time: wfd.ftLastAccessTime,
1068 last_write_time: wfd.ftLastWriteTime,
1069 change_time: None,
1070 file_size: ((wfd.nFileSizeHigh as u64) << 32) | (wfd.nFileSizeLow as u64),
1071 reparse_tag: if wfd.dwFileAttributes & c::FILE_ATTRIBUTE_REPARSE_POINT != 0 {
1072 wfd.dwReserved0
1074 } else {
1075 0
1076 },
1077 volume_serial_number: None,
1078 number_of_links: None,
1079 file_index: None,
1080 }
1081 }
1082}
1083
1084fn to_u64(ft: &c::FILETIME) -> u64 {
1085 (ft.dwLowDateTime as u64) | ((ft.dwHighDateTime as u64) << 32)
1086}
1087
1088impl FilePermissions {
1089 pub fn readonly(&self) -> bool {
1090 self.attrs & c::FILE_ATTRIBUTE_READONLY != 0
1091 }
1092
1093 pub fn set_readonly(&mut self, readonly: bool) {
1094 if readonly {
1095 self.attrs |= c::FILE_ATTRIBUTE_READONLY;
1096 } else {
1097 self.attrs &= !c::FILE_ATTRIBUTE_READONLY;
1098 }
1099 }
1100}
1101
1102impl FileTimes {
1103 pub fn set_accessed(&mut self, t: SystemTime) {
1104 self.accessed = Some(t.into_inner());
1105 }
1106
1107 pub fn set_modified(&mut self, t: SystemTime) {
1108 self.modified = Some(t.into_inner());
1109 }
1110
1111 pub fn set_created(&mut self, t: SystemTime) {
1112 self.created = Some(t.into_inner());
1113 }
1114}
1115
1116impl FileType {
1117 fn new(attributes: u32, reparse_tag: u32) -> FileType {
1118 let is_directory = attributes & c::FILE_ATTRIBUTE_DIRECTORY != 0;
1119 let is_symlink = {
1120 let is_reparse_point = attributes & c::FILE_ATTRIBUTE_REPARSE_POINT != 0;
1121 let is_reparse_tag_name_surrogate = reparse_tag & 0x20000000 != 0;
1122 is_reparse_point && is_reparse_tag_name_surrogate
1123 };
1124 FileType { is_directory, is_symlink }
1125 }
1126 pub fn is_dir(&self) -> bool {
1127 !self.is_symlink && self.is_directory
1128 }
1129 pub fn is_file(&self) -> bool {
1130 !self.is_symlink && !self.is_directory
1131 }
1132 pub fn is_symlink(&self) -> bool {
1133 self.is_symlink
1134 }
1135 pub fn is_symlink_dir(&self) -> bool {
1136 self.is_symlink && self.is_directory
1137 }
1138 pub fn is_symlink_file(&self) -> bool {
1139 self.is_symlink && !self.is_directory
1140 }
1141}
1142
1143impl DirBuilder {
1144 pub fn new() -> DirBuilder {
1145 DirBuilder
1146 }
1147
1148 pub fn mkdir(&self, p: &Path) -> io::Result<()> {
1149 let p = maybe_verbatim(p)?;
1150 cvt(unsafe { c::CreateDirectoryW(p.as_ptr(), ptr::null_mut()) })?;
1151 Ok(())
1152 }
1153}
1154
1155pub fn readdir(p: &Path) -> io::Result<ReadDir> {
1156 if p.as_os_str().is_empty() {
1160 return Err(io::Error::from_raw_os_error(c::ERROR_PATH_NOT_FOUND as i32));
1163 }
1164 let root = p.to_path_buf();
1165 let star = p.join("*");
1166 let path = maybe_verbatim(&star)?;
1167
1168 unsafe {
1169 let mut wfd: c::WIN32_FIND_DATAW = mem::zeroed();
1170 let find_handle = c::FindFirstFileExW(
1178 path.as_ptr(),
1179 c::FindExInfoBasic,
1180 &mut wfd as *mut _ as _,
1181 c::FindExSearchNameMatch,
1182 ptr::null(),
1183 0,
1184 );
1185
1186 if find_handle != c::INVALID_HANDLE_VALUE {
1187 Ok(ReadDir {
1188 handle: Some(FindNextFileHandle(find_handle)),
1189 root: Arc::new(root),
1190 first: Some(wfd),
1191 })
1192 } else {
1193 let last_error = api::get_last_error();
1205 if last_error == WinError::FILE_NOT_FOUND {
1206 return Ok(ReadDir { handle: None, root: Arc::new(root), first: None });
1207 }
1208
1209 Err(Error::from_raw_os_error(last_error.code as i32))
1214 }
1215 }
1216}
1217
1218pub fn unlink(path: &WCStr) -> io::Result<()> {
1219 if unsafe { c::DeleteFileW(path.as_ptr()) } == 0 {
1220 let err = api::get_last_error();
1221 if err == WinError::ACCESS_DENIED {
1225 let mut opts = OpenOptions::new();
1226 opts.access_mode(c::DELETE);
1227 opts.custom_flags(c::FILE_FLAG_OPEN_REPARSE_POINT);
1228 if let Ok(f) = File::open_native(&path, &opts) {
1229 if f.posix_delete().is_ok() {
1230 return Ok(());
1231 }
1232 }
1233 }
1234 Err(io::Error::from_raw_os_error(err.code as i32))
1236 } else {
1237 Ok(())
1238 }
1239}
1240
1241pub fn rename(old: &WCStr, new: &WCStr) -> io::Result<()> {
1242 if unsafe { c::MoveFileExW(old.as_ptr(), new.as_ptr(), c::MOVEFILE_REPLACE_EXISTING) } == 0 {
1243 let err = api::get_last_error();
1244 if err == WinError::ACCESS_DENIED {
1248 let mut opts = OpenOptions::new();
1249 opts.access_mode(c::DELETE);
1250 opts.custom_flags(c::FILE_FLAG_OPEN_REPARSE_POINT | c::FILE_FLAG_BACKUP_SEMANTICS);
1251 let Ok(f) = File::open_native(&old, &opts) else { return Err(err).io_result() };
1252
1253 let Ok(new_len_without_nul_in_bytes): Result<u32, _> =
1256 ((new.count_bytes() - 1) * 2).try_into()
1257 else {
1258 return Err(err).io_result();
1259 };
1260 let offset: u32 = offset_of!(c::FILE_RENAME_INFO, FileName).try_into().unwrap();
1261 let struct_size = offset + new_len_without_nul_in_bytes + 2;
1262 let layout =
1263 Layout::from_size_align(struct_size as usize, align_of::<c::FILE_RENAME_INFO>())
1264 .unwrap();
1265
1266 let file_rename_info;
1268 unsafe {
1269 file_rename_info = alloc(layout).cast::<c::FILE_RENAME_INFO>();
1270 if file_rename_info.is_null() {
1271 return Err(io::ErrorKind::OutOfMemory.into());
1272 }
1273
1274 (&raw mut (*file_rename_info).Anonymous).write(c::FILE_RENAME_INFO_0 {
1275 Flags: c::FILE_RENAME_FLAG_REPLACE_IF_EXISTS
1276 | c::FILE_RENAME_FLAG_POSIX_SEMANTICS,
1277 });
1278
1279 (&raw mut (*file_rename_info).RootDirectory).write(ptr::null_mut());
1280 (&raw mut (*file_rename_info).FileNameLength).write(new_len_without_nul_in_bytes);
1282
1283 new.as_ptr().copy_to_nonoverlapping(
1284 (&raw mut (*file_rename_info).FileName).cast::<u16>(),
1285 new.count_bytes(),
1286 );
1287 }
1288
1289 let result = unsafe {
1290 c::SetFileInformationByHandle(
1291 f.as_raw_handle(),
1292 c::FileRenameInfoEx,
1293 file_rename_info.cast::<c_void>(),
1294 struct_size,
1295 )
1296 };
1297 unsafe { dealloc(file_rename_info.cast::<u8>(), layout) };
1298 if result == 0 {
1299 if api::get_last_error() == WinError::DIR_NOT_EMPTY {
1300 return Err(WinError::DIR_NOT_EMPTY).io_result();
1301 } else {
1302 return Err(err).io_result();
1303 }
1304 }
1305 } else {
1306 return Err(err).io_result();
1307 }
1308 }
1309 Ok(())
1310}
1311
1312pub fn rmdir(p: &WCStr) -> io::Result<()> {
1313 cvt(unsafe { c::RemoveDirectoryW(p.as_ptr()) })?;
1314 Ok(())
1315}
1316
1317pub fn remove_dir_all(path: &WCStr) -> io::Result<()> {
1318 let mut opts = OpenOptions::new();
1320 opts.access_mode(c::FILE_LIST_DIRECTORY);
1321 opts.custom_flags(c::FILE_FLAG_BACKUP_SEMANTICS | c::FILE_FLAG_OPEN_REPARSE_POINT);
1324 let file = File::open_native(path, &opts)?;
1325
1326 if (file.basic_info()?.FileAttributes & c::FILE_ATTRIBUTE_DIRECTORY) == 0 {
1328 return Err(io::Error::from_raw_os_error(c::ERROR_DIRECTORY as _));
1329 }
1330
1331 remove_dir_all_iterative(file).io_result()
1333}
1334
1335pub fn readlink(path: &WCStr) -> io::Result<PathBuf> {
1336 let mut opts = OpenOptions::new();
1340 opts.access_mode(0);
1341 opts.custom_flags(c::FILE_FLAG_OPEN_REPARSE_POINT | c::FILE_FLAG_BACKUP_SEMANTICS);
1342 let file = File::open_native(&path, &opts)?;
1343 file.readlink()
1344}
1345
1346pub fn symlink(original: &Path, link: &Path) -> io::Result<()> {
1347 symlink_inner(original, link, false)
1348}
1349
1350pub fn symlink_inner(original: &Path, link: &Path, dir: bool) -> io::Result<()> {
1351 let original = to_u16s(original)?;
1352 let link = maybe_verbatim(link)?;
1353 let flags = if dir { c::SYMBOLIC_LINK_FLAG_DIRECTORY } else { 0 };
1354 let result = cvt(unsafe {
1359 c::CreateSymbolicLinkW(
1360 link.as_ptr(),
1361 original.as_ptr(),
1362 flags | c::SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE,
1363 ) as c::BOOL
1364 });
1365 if let Err(err) = result {
1366 if err.raw_os_error() == Some(c::ERROR_INVALID_PARAMETER as i32) {
1367 cvt(unsafe {
1370 c::CreateSymbolicLinkW(link.as_ptr(), original.as_ptr(), flags) as c::BOOL
1371 })?;
1372 } else {
1373 return Err(err);
1374 }
1375 }
1376 Ok(())
1377}
1378
1379#[cfg(not(target_vendor = "uwp"))]
1380pub fn link(original: &WCStr, link: &WCStr) -> io::Result<()> {
1381 cvt(unsafe { c::CreateHardLinkW(link.as_ptr(), original.as_ptr(), ptr::null_mut()) })?;
1382 Ok(())
1383}
1384
1385#[cfg(target_vendor = "uwp")]
1386pub fn link(_original: &WCStr, _link: &WCStr) -> io::Result<()> {
1387 return Err(io::const_error!(io::ErrorKind::Unsupported, "hard link are not supported on UWP"));
1388}
1389
1390pub fn stat(path: &WCStr) -> io::Result<FileAttr> {
1391 match metadata(path, ReparsePoint::Follow) {
1392 Err(err) if err.raw_os_error() == Some(c::ERROR_CANT_ACCESS_FILE as i32) => {
1393 if let Ok(attrs) = lstat(path) {
1394 if !attrs.file_type().is_symlink() {
1395 return Ok(attrs);
1396 }
1397 }
1398 Err(err)
1399 }
1400 result => result,
1401 }
1402}
1403
1404pub fn lstat(path: &WCStr) -> io::Result<FileAttr> {
1405 metadata(path, ReparsePoint::Open)
1406}
1407
1408#[repr(u32)]
1409#[derive(Clone, Copy, PartialEq, Eq)]
1410enum ReparsePoint {
1411 Follow = 0,
1412 Open = c::FILE_FLAG_OPEN_REPARSE_POINT,
1413}
1414impl ReparsePoint {
1415 fn as_flag(self) -> u32 {
1416 self as u32
1417 }
1418}
1419
1420fn metadata(path: &WCStr, reparse: ReparsePoint) -> io::Result<FileAttr> {
1421 let mut opts = OpenOptions::new();
1422 opts.access_mode(0);
1424 opts.custom_flags(c::FILE_FLAG_BACKUP_SEMANTICS | reparse.as_flag());
1425
1426 match File::open_native(&path, &opts) {
1430 Ok(file) => file.file_attr(),
1431 Err(e)
1432 if [Some(c::ERROR_SHARING_VIOLATION as _), Some(c::ERROR_ACCESS_DENIED as _)]
1433 .contains(&e.raw_os_error()) =>
1434 {
1435 unsafe {
1442 let mut wfd: c::WIN32_FIND_DATAW = mem::zeroed();
1448 let handle = c::FindFirstFileExW(
1449 path.as_ptr(),
1450 c::FindExInfoBasic,
1451 &mut wfd as *mut _ as _,
1452 c::FindExSearchNameMatch,
1453 ptr::null(),
1454 0,
1455 );
1456
1457 if handle == c::INVALID_HANDLE_VALUE {
1458 Err(e)
1461 } else {
1462 c::FindClose(handle);
1464
1465 let attrs = FileAttr::from(wfd);
1468 if reparse == ReparsePoint::Follow && attrs.file_type().is_symlink() {
1469 Err(e)
1470 } else {
1471 Ok(attrs)
1472 }
1473 }
1474 }
1475 }
1476 Err(e) => Err(e),
1477 }
1478}
1479
1480pub fn set_perm(p: &WCStr, perm: FilePermissions) -> io::Result<()> {
1481 unsafe {
1482 cvt(c::SetFileAttributesW(p.as_ptr(), perm.attrs))?;
1483 Ok(())
1484 }
1485}
1486
1487fn get_path(f: &File) -> io::Result<PathBuf> {
1488 fill_utf16_buf(
1489 |buf, sz| unsafe {
1490 c::GetFinalPathNameByHandleW(f.handle.as_raw_handle(), buf, sz, c::VOLUME_NAME_DOS)
1491 },
1492 |buf| PathBuf::from(OsString::from_wide(buf)),
1493 )
1494}
1495
1496pub fn canonicalize(p: &WCStr) -> io::Result<PathBuf> {
1497 let mut opts = OpenOptions::new();
1498 opts.access_mode(0);
1500 opts.custom_flags(c::FILE_FLAG_BACKUP_SEMANTICS);
1502 let f = File::open_native(p, &opts)?;
1503 get_path(&f)
1504}
1505
1506pub fn copy(from: &WCStr, to: &WCStr) -> io::Result<u64> {
1507 unsafe extern "system" fn callback(
1508 _TotalFileSize: i64,
1509 _TotalBytesTransferred: i64,
1510 _StreamSize: i64,
1511 StreamBytesTransferred: i64,
1512 dwStreamNumber: u32,
1513 _dwCallbackReason: u32,
1514 _hSourceFile: c::HANDLE,
1515 _hDestinationFile: c::HANDLE,
1516 lpData: *const c_void,
1517 ) -> u32 {
1518 unsafe {
1519 if dwStreamNumber == 1 {
1520 *(lpData as *mut i64) = StreamBytesTransferred;
1521 }
1522 c::PROGRESS_CONTINUE
1523 }
1524 }
1525 let mut size = 0i64;
1526 cvt(unsafe {
1527 c::CopyFileExW(
1528 from.as_ptr(),
1529 to.as_ptr(),
1530 Some(callback),
1531 (&raw mut size) as *mut _,
1532 ptr::null_mut(),
1533 0,
1534 )
1535 })?;
1536 Ok(size as u64)
1537}
1538
1539pub fn junction_point(original: &Path, link: &Path) -> io::Result<()> {
1540 let mut opts = OpenOptions::new();
1542 opts.create_new(true);
1543 opts.write(true);
1544 opts.custom_flags(c::FILE_FLAG_BACKUP_SEMANTICS | c::FILE_FLAG_POSIX_SEMANTICS);
1545 opts.attributes(c::FILE_ATTRIBUTE_DIRECTORY);
1546
1547 let d = File::open(link, &opts)?;
1548
1549 let path_bytes = original.as_os_str().as_encoded_bytes();
1551 let abs_path: Vec<u16> = if path_bytes.starts_with(br"\\?\") || path_bytes.starts_with(br"\??\")
1552 {
1553 let bytes = unsafe { OsStr::from_encoded_bytes_unchecked(&path_bytes[4..]) };
1555 r"\??\".encode_utf16().chain(bytes.encode_wide()).collect()
1556 } else {
1557 let abs_path = crate::path::absolute(original)?.into_os_string().into_encoded_bytes();
1559 if abs_path.len() > 0 && abs_path[1..].starts_with(br":\") {
1560 let bytes = unsafe { OsStr::from_encoded_bytes_unchecked(&abs_path) };
1561 r"\??\".encode_utf16().chain(bytes.encode_wide()).collect()
1562 } else if abs_path.starts_with(br"\\.\") {
1563 let bytes = unsafe { OsStr::from_encoded_bytes_unchecked(&abs_path[4..]) };
1564 r"\??\".encode_utf16().chain(bytes.encode_wide()).collect()
1565 } else if abs_path.starts_with(br"\\") {
1566 let bytes = unsafe { OsStr::from_encoded_bytes_unchecked(&abs_path[2..]) };
1567 r"\??\UNC\".encode_utf16().chain(bytes.encode_wide()).collect()
1568 } else {
1569 return Err(io::const_error!(io::ErrorKind::InvalidInput, "path is not valid"));
1570 }
1571 };
1572 #[repr(C)]
1574 pub struct MountPointBuffer {
1575 ReparseTag: u32,
1576 ReparseDataLength: u16,
1577 Reserved: u16,
1578 SubstituteNameOffset: u16,
1579 SubstituteNameLength: u16,
1580 PrintNameOffset: u16,
1581 PrintNameLength: u16,
1582 PathBuffer: [MaybeUninit<u16>; c::MAXIMUM_REPARSE_DATA_BUFFER_SIZE as usize],
1583 }
1584 let data_len = 12 + (abs_path.len() * 2);
1585 if data_len > u16::MAX as usize {
1586 return Err(io::const_error!(io::ErrorKind::InvalidInput, "`original` path is too long"));
1587 }
1588 let data_len = data_len as u16;
1589 let mut header = MountPointBuffer {
1590 ReparseTag: c::IO_REPARSE_TAG_MOUNT_POINT,
1591 ReparseDataLength: data_len,
1592 Reserved: 0,
1593 SubstituteNameOffset: 0,
1594 SubstituteNameLength: (abs_path.len() * 2) as u16,
1595 PrintNameOffset: ((abs_path.len() + 1) * 2) as u16,
1596 PrintNameLength: 0,
1597 PathBuffer: [MaybeUninit::uninit(); c::MAXIMUM_REPARSE_DATA_BUFFER_SIZE as usize],
1598 };
1599 unsafe {
1600 let ptr = header.PathBuffer.as_mut_ptr();
1601 ptr.copy_from(abs_path.as_ptr().cast::<MaybeUninit<u16>>(), abs_path.len());
1602
1603 let mut ret = 0;
1604 cvt(c::DeviceIoControl(
1605 d.as_raw_handle(),
1606 c::FSCTL_SET_REPARSE_POINT,
1607 (&raw const header).cast::<c_void>(),
1608 data_len as u32 + 8,
1609 ptr::null_mut(),
1610 0,
1611 &mut ret,
1612 ptr::null_mut(),
1613 ))
1614 .map(drop)
1615 }
1616}
1617
1618pub fn exists(path: &WCStr) -> io::Result<bool> {
1620 let mut opts = OpenOptions::new();
1622 opts.access_mode(0);
1624 opts.custom_flags(c::FILE_FLAG_BACKUP_SEMANTICS);
1626 match File::open_native(path, &opts) {
1627 Err(e) => match e.kind() {
1628 io::ErrorKind::NotFound => Ok(false),
1630
1631 _ if e.raw_os_error() == Some(c::ERROR_SHARING_VIOLATION as i32) => Ok(true),
1635
1636 _ if e.raw_os_error() == Some(c::ERROR_CANT_ACCESS_FILE as i32) => Ok(true),
1642
1643 _ => Err(e),
1647 },
1648 Ok(_) => Ok(true),
1650 }
1651}