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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:11:38 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:13:23 +0000 |
commit | 20431706a863f92cb37dc512fef6e48d192aaf2c (patch) | |
tree | 2867f13f5fd5437ba628c67d7f87309ccadcd286 /library/std/src/sys/windows/fs.rs | |
parent | Releasing progress-linux version 1.65.0+dfsg1-2~progress7.99u1. (diff) | |
download | rustc-20431706a863f92cb37dc512fef6e48d192aaf2c.tar.xz rustc-20431706a863f92cb37dc512fef6e48d192aaf2c.zip |
Merging upstream version 1.66.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | library/std/src/sys/windows/fs.rs | 41 |
1 files changed, 31 insertions, 10 deletions
diff --git a/library/std/src/sys/windows/fs.rs b/library/std/src/sys/windows/fs.rs index 155d0297e..378098038 100644 --- a/library/std/src/sys/windows/fs.rs +++ b/library/std/src/sys/windows/fs.rs @@ -1,5 +1,6 @@ use crate::os::windows::prelude::*; +use crate::borrow::Cow; use crate::ffi::OsString; use crate::fmt; use crate::io::{self, BorrowedCursor, Error, IoSlice, IoSliceMut, SeekFrom}; @@ -572,6 +573,14 @@ impl File { "Cannot set file timestamp to 0", )); } + let is_max = + |t: c::FILETIME| t.dwLowDateTime == c::DWORD::MAX && t.dwHighDateTime == c::DWORD::MAX; + if times.accessed.map_or(false, is_max) || times.modified.map_or(false, is_max) { + return Err(io::const_io_error!( + io::ErrorKind::InvalidInput, + "Cannot set file timestamp to 0xFFFF_FFFF_FFFF_FFFF", + )); + } cvt(unsafe { c::SetFileTime(self.as_handle(), None, times.accessed.as_ref(), times.modified.as_ref()) })?; @@ -711,7 +720,7 @@ impl<'a> DirBuffIter<'a> { } } impl<'a> Iterator for DirBuffIter<'a> { - type Item = (&'a [u16], bool); + type Item = (Cow<'a, [u16]>, bool); fn next(&mut self) -> Option<Self::Item> { use crate::mem::size_of; let buffer = &self.buffer?[self.cursor..]; @@ -726,15 +735,19 @@ impl<'a> Iterator for DirBuffIter<'a> { // `FileNameLength` bytes) let (name, is_directory, next_entry) = unsafe { let info = buffer.as_ptr().cast::<c::FILE_ID_BOTH_DIR_INFO>(); - // Guaranteed to be aligned in documentation for + // While this is guaranteed to be aligned in documentation for // https://docs.microsoft.com/en-us/windows/win32/api/winbase/ns-winbase-file_id_both_dir_info - assert!(info.is_aligned()); - let next_entry = (*info).NextEntryOffset as usize; - let name = crate::slice::from_raw_parts( + // it does not seem that reality is so kind, and assuming this + // caused crashes in some cases (https://github.com/rust-lang/rust/issues/104530) + // presumably, this can be blamed on buggy filesystem drivers, but who knows. + let next_entry = ptr::addr_of!((*info).NextEntryOffset).read_unaligned() as usize; + let length = ptr::addr_of!((*info).FileNameLength).read_unaligned() as usize; + let attrs = ptr::addr_of!((*info).FileAttributes).read_unaligned(); + let name = from_maybe_unaligned( ptr::addr_of!((*info).FileName).cast::<u16>(), - (*info).FileNameLength as usize / size_of::<u16>(), + length / size_of::<u16>(), ); - let is_directory = ((*info).FileAttributes & c::FILE_ATTRIBUTE_DIRECTORY) != 0; + let is_directory = (attrs & c::FILE_ATTRIBUTE_DIRECTORY) != 0; (name, is_directory, next_entry) }; @@ -747,13 +760,21 @@ impl<'a> Iterator for DirBuffIter<'a> { // Skip `.` and `..` pseudo entries. const DOT: u16 = b'.' as u16; - match name { + match &name[..] { [DOT] | [DOT, DOT] => self.next(), _ => Some((name, is_directory)), } } } +unsafe fn from_maybe_unaligned<'a>(p: *const u16, len: usize) -> Cow<'a, [u16]> { + if p.is_aligned() { + Cow::Borrowed(crate::slice::from_raw_parts(p, len)) + } else { + Cow::Owned((0..len).map(|i| p.add(i).read_unaligned()).collect()) + } +} + /// Open a link relative to the parent directory, ensure no symlinks are followed. fn open_link_no_reparse(parent: &File, name: &[u16], access: u32) -> io::Result<File> { // This is implemented using the lower level `NtCreateFile` function as @@ -1109,13 +1130,13 @@ fn remove_dir_all_iterative(f: &File, delete: fn(&File) -> io::Result<()>) -> io if is_directory { let child_dir = open_link_no_reparse( &dir, - name, + &name, c::SYNCHRONIZE | c::DELETE | c::FILE_LIST_DIRECTORY, )?; dirlist.push(child_dir); } else { for i in 1..=MAX_RETRIES { - let result = open_link_no_reparse(&dir, name, c::SYNCHRONIZE | c::DELETE); + let result = open_link_no_reparse(&dir, &name, c::SYNCHRONIZE | c::DELETE); match result { Ok(f) => delete(&f)?, // Already deleted, so skip. |