1 use std::collections::BTreeMap;
2 use std::convert::{TryFrom, TryInto};
3 use std::fs::{read_dir, remove_dir, remove_file, rename, DirBuilder, File, FileType, OpenOptions, ReadDir};
4 use std::io::{self, Read, Seek, SeekFrom, Write};
6 use std::time::SystemTime;
10 use rustc_data_structures::fx::FxHashMap;
11 use rustc_target::abi::{Align, LayoutOf, Size};
15 use stacked_borrows::Tag;
16 use helpers::{check_arg_count, immty_from_int_checked, immty_from_uint_checked};
17 use shims::time::system_time_to_duration;
25 trait FileDescriptor<'tcx> : std::fmt::Debug {
26 fn as_file_handle(&self) -> InterpResult<'tcx, &FileHandle>;
28 fn read(&mut self, bytes: &mut [u8]) -> Result<usize, io::Error>;
29 fn write(&mut self, bytes: &[u8]) -> Result<usize, io::Error>;
30 fn seek(&mut self, offset: SeekFrom) -> Result<u64, io::Error>;
33 impl<'tcx> FileDescriptor<'tcx> for FileHandle {
34 fn as_file_handle(&self) -> InterpResult<'tcx, &FileHandle> {
38 fn read(&mut self, bytes: &mut [u8]) -> Result<usize, io::Error> {
42 fn write(&mut self, bytes: &[u8]) -> Result<usize, io::Error> {
43 self.file.write(bytes)
46 fn seek(&mut self, offset: SeekFrom) -> Result<u64, io::Error> {
47 self.file.seek(offset)
51 #[derive(Debug, Default)]
52 pub struct FileHandler<'tcx> {
53 handles: BTreeMap<i32, Box<dyn FileDescriptor<'tcx>>>,
57 // fd numbers 0, 1, and 2 are reserved for stdin, stdout, and stderr
58 const MIN_NORMAL_FILE_FD: i32 = 3;
60 impl<'tcx> FileHandler<'tcx> {
61 fn insert_fd(&mut self, file_handle: FileHandle) -> i32 {
62 self.insert_fd_with_min_fd(file_handle, 0)
65 fn insert_fd_with_min_fd(&mut self, file_handle: FileHandle, min_fd: i32) -> i32 {
66 let min_fd = std::cmp::max(min_fd, MIN_NORMAL_FILE_FD);
68 // Find the lowest unused FD, starting from min_fd. If the first such unused FD is in
69 // between used FDs, the find_map combinator will return it. If the first such unused FD
70 // is after all other used FDs, the find_map combinator will return None, and we will use
71 // the FD following the greatest FD thus far.
72 let candidate_new_fd = self
76 .find_map(|((fd, _fh), counter)| {
78 // There was a gap in the fds stored, return the first unused one
79 // (note that this relies on BTreeMap iterating in key order)
82 // This fd is used, keep going
86 let new_fd = candidate_new_fd.unwrap_or_else(|| {
87 // find_map ran out of BTreeMap entries before finding a free fd, use one plus the
88 // maximum fd in the map
89 self.handles.last_key_value().map(|(fd, _)| fd.checked_add(1).unwrap()).unwrap_or(min_fd)
92 self.handles.insert(new_fd, Box::new(file_handle)).unwrap_none();
97 impl<'mir, 'tcx: 'mir> EvalContextExtPrivate<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
98 trait EvalContextExtPrivate<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
99 /// Emulate `stat` or `lstat` on `macos`. This function is not intended to be
100 /// called directly from `emulate_foreign_item_by_name`, so it does not check if isolation is
101 /// disabled or if the target OS is the correct one. Please use `macos_stat` or
102 /// `macos_lstat` instead.
103 fn macos_stat_or_lstat(
105 follow_symlink: bool,
106 path_op: OpTy<'tcx, Tag>,
107 buf_op: OpTy<'tcx, Tag>,
108 ) -> InterpResult<'tcx, i32> {
109 let this = self.eval_context_mut();
111 let path_scalar = this.read_scalar(path_op)?.not_undef()?;
112 let path = this.read_path_from_c_str(path_scalar)?.into_owned();
114 let metadata = match FileMetadata::from_path(this, &path, follow_symlink)? {
115 Some(metadata) => metadata,
116 None => return Ok(-1),
118 this.macos_stat_write_buf(metadata, buf_op)
121 fn macos_stat_write_buf(
123 metadata: FileMetadata,
124 buf_op: OpTy<'tcx, Tag>,
125 ) -> InterpResult<'tcx, i32> {
126 let this = self.eval_context_mut();
128 let mode: u16 = metadata.mode.to_u16()?;
130 let (access_sec, access_nsec) = metadata.accessed.unwrap_or((0, 0));
131 let (created_sec, created_nsec) = metadata.created.unwrap_or((0, 0));
132 let (modified_sec, modified_nsec) = metadata.modified.unwrap_or((0, 0));
134 let dev_t_layout = this.libc_ty_layout("dev_t")?;
135 let mode_t_layout = this.libc_ty_layout("mode_t")?;
136 let nlink_t_layout = this.libc_ty_layout("nlink_t")?;
137 let ino_t_layout = this.libc_ty_layout("ino_t")?;
138 let uid_t_layout = this.libc_ty_layout("uid_t")?;
139 let gid_t_layout = this.libc_ty_layout("gid_t")?;
140 let time_t_layout = this.libc_ty_layout("time_t")?;
141 let long_layout = this.libc_ty_layout("c_long")?;
142 let off_t_layout = this.libc_ty_layout("off_t")?;
143 let blkcnt_t_layout = this.libc_ty_layout("blkcnt_t")?;
144 let blksize_t_layout = this.libc_ty_layout("blksize_t")?;
145 let uint32_t_layout = this.libc_ty_layout("uint32_t")?;
148 immty_from_uint_checked(0u128, dev_t_layout)?, // st_dev
149 immty_from_uint_checked(mode, mode_t_layout)?, // st_mode
150 immty_from_uint_checked(0u128, nlink_t_layout)?, // st_nlink
151 immty_from_uint_checked(0u128, ino_t_layout)?, // st_ino
152 immty_from_uint_checked(0u128, uid_t_layout)?, // st_uid
153 immty_from_uint_checked(0u128, gid_t_layout)?, // st_gid
154 immty_from_uint_checked(0u128, dev_t_layout)?, // st_rdev
155 immty_from_uint_checked(0u128, uint32_t_layout)?, // padding
156 immty_from_uint_checked(access_sec, time_t_layout)?, // st_atime
157 immty_from_uint_checked(access_nsec, long_layout)?, // st_atime_nsec
158 immty_from_uint_checked(modified_sec, time_t_layout)?, // st_mtime
159 immty_from_uint_checked(modified_nsec, long_layout)?, // st_mtime_nsec
160 immty_from_uint_checked(0u128, time_t_layout)?, // st_ctime
161 immty_from_uint_checked(0u128, long_layout)?, // st_ctime_nsec
162 immty_from_uint_checked(created_sec, time_t_layout)?, // st_birthtime
163 immty_from_uint_checked(created_nsec, long_layout)?, // st_birthtime_nsec
164 immty_from_uint_checked(metadata.size, off_t_layout)?, // st_size
165 immty_from_uint_checked(0u128, blkcnt_t_layout)?, // st_blocks
166 immty_from_uint_checked(0u128, blksize_t_layout)?, // st_blksize
167 immty_from_uint_checked(0u128, uint32_t_layout)?, // st_flags
168 immty_from_uint_checked(0u128, uint32_t_layout)?, // st_gen
171 let buf = this.deref_operand(buf_op)?;
172 this.write_packed_immediates(buf, &imms)?;
177 /// Function used when a handle is not found inside `FileHandler`. It returns `Ok(-1)`and sets
178 /// the last OS error to `libc::EBADF` (invalid file descriptor). This function uses
179 /// `T: From<i32>` instead of `i32` directly because some fs functions return different integer
180 /// types (like `read`, that returns an `i64`).
181 fn handle_not_found<T: From<i32>>(&mut self) -> InterpResult<'tcx, T> {
182 let this = self.eval_context_mut();
183 let ebadf = this.eval_libc("EBADF")?;
184 this.set_last_error(ebadf)?;
188 fn file_type_to_d_type(&mut self, file_type: std::io::Result<FileType>) -> InterpResult<'tcx, i32> {
189 let this = self.eval_context_mut();
192 if file_type.is_dir() {
193 Ok(this.eval_libc("DT_DIR")?.to_u8()?.into())
194 } else if file_type.is_file() {
195 Ok(this.eval_libc("DT_REG")?.to_u8()?.into())
196 } else if file_type.is_symlink() {
197 Ok(this.eval_libc("DT_LNK")?.to_u8()?.into())
199 // Certain file types are only supported when the host is a Unix system.
200 // (i.e. devices and sockets) If it is, check those cases, if not, fall back to
201 // DT_UNKNOWN sooner.
205 use std::os::unix::fs::FileTypeExt;
206 if file_type.is_block_device() {
207 Ok(this.eval_libc("DT_BLK")?.to_u8()?.into())
208 } else if file_type.is_char_device() {
209 Ok(this.eval_libc("DT_CHR")?.to_u8()?.into())
210 } else if file_type.is_fifo() {
211 Ok(this.eval_libc("DT_FIFO")?.to_u8()?.into())
212 } else if file_type.is_socket() {
213 Ok(this.eval_libc("DT_SOCK")?.to_u8()?.into())
215 Ok(this.eval_libc("DT_UNKNOWN")?.to_u8()?.into())
219 Ok(this.eval_libc("DT_UNKNOWN")?.to_u8()?.into())
222 Err(e) => return match e.raw_os_error() {
223 Some(error) => Ok(error),
224 None => throw_unsup_format!("the error {} couldn't be converted to a return value", e),
231 pub struct DirHandler {
232 /// Directory iterators used to emulate libc "directory streams", as used in opendir, readdir,
235 /// When opendir is called, a directory iterator is created on the host for the target
236 /// directory, and an entry is stored in this hash map, indexed by an ID which represents
237 /// the directory stream. When readdir is called, the directory stream ID is used to look up
238 /// the corresponding ReadDir iterator from this map, and information from the next
239 /// directory entry is returned. When closedir is called, the ReadDir iterator is removed from
241 streams: FxHashMap<u64, ReadDir>,
242 /// ID number to be used by the next call to opendir
247 fn insert_new(&mut self, read_dir: ReadDir) -> u64 {
248 let id = self.next_id;
250 self.streams.insert(id, read_dir).unwrap_none();
255 impl Default for DirHandler {
256 fn default() -> DirHandler {
258 streams: FxHashMap::default(),
259 // Skip 0 as an ID, because it looks like a null pointer to libc
265 fn maybe_sync_file(file: &File, writable: bool, operation: fn(&File) -> std::io::Result<()>) -> std::io::Result<i32> {
266 if !writable && cfg!(windows) {
267 // sync_all() and sync_data() will return an error on Windows hosts if the file is not opened
268 // for writing. (FlushFileBuffers requires that the file handle have the
269 // GENERIC_WRITE right)
272 let result = operation(file);
277 impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
278 pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
281 path_op: OpTy<'tcx, Tag>,
282 flag_op: OpTy<'tcx, Tag>,
283 mode_op: OpTy<'tcx, Tag>,
284 ) -> InterpResult<'tcx, i32> {
285 let this = self.eval_context_mut();
287 this.check_no_isolation("open")?;
289 let flag = this.read_scalar(flag_op)?.to_i32()?;
291 // Get the mode. On macOS, the argument type `mode_t` is actually `u16`, but
292 // C integer promotion rules mean that on the ABI level, it gets passed as `u32`
293 // (see https://github.com/rust-lang/rust/issues/71915).
294 let mode = this.read_scalar(mode_op)?.to_u32()?;
296 throw_unsup_format!("non-default mode 0o{:o} is not supported", mode);
299 let mut options = OpenOptions::new();
301 let o_rdonly = this.eval_libc_i32("O_RDONLY")?;
302 let o_wronly = this.eval_libc_i32("O_WRONLY")?;
303 let o_rdwr = this.eval_libc_i32("O_RDWR")?;
304 // The first two bits of the flag correspond to the access mode in linux, macOS and
305 // windows. We need to check that in fact the access mode flags for the current target
306 // only use these two bits, otherwise we are in an unsupported target and should error.
307 if (o_rdonly | o_wronly | o_rdwr) & !0b11 != 0 {
308 throw_unsup_format!("access mode flags on this target are unsupported");
310 let mut writable = true;
312 // Now we check the access mode
313 let access_mode = flag & 0b11;
315 if access_mode == o_rdonly {
318 } else if access_mode == o_wronly {
320 } else if access_mode == o_rdwr {
321 options.read(true).write(true);
323 throw_unsup_format!("unsupported access mode {:#x}", access_mode);
325 // We need to check that there aren't unsupported options in `flag`. For this we try to
326 // reproduce the content of `flag` in the `mirror` variable using only the supported
328 let mut mirror = access_mode;
330 let o_append = this.eval_libc_i32("O_APPEND")?;
331 if flag & o_append != 0 {
332 options.append(true);
335 let o_trunc = this.eval_libc_i32("O_TRUNC")?;
336 if flag & o_trunc != 0 {
337 options.truncate(true);
340 let o_creat = this.eval_libc_i32("O_CREAT")?;
341 if flag & o_creat != 0 {
344 let o_excl = this.eval_libc_i32("O_EXCL")?;
345 if flag & o_excl != 0 {
347 options.create_new(true);
349 options.create(true);
352 let o_cloexec = this.eval_libc_i32("O_CLOEXEC")?;
353 if flag & o_cloexec != 0 {
354 // We do not need to do anything for this flag because `std` already sets it.
355 // (Technically we do not support *not* setting this flag, but we ignore that.)
358 // If `flag` is not equal to `mirror`, there is an unsupported option enabled in `flag`,
359 // then we throw an error.
361 throw_unsup_format!("unsupported flags {:#x}", flag & !mirror);
364 let path = this.read_path_from_c_str(this.read_scalar(path_op)?.not_undef()?)?;
366 let fd = options.open(&path).map(|file| {
367 let fh = &mut this.machine.file_handler;
368 fh.insert_fd(FileHandle { file, writable })
371 this.try_unwrap_io_result(fd)
376 args: &[OpTy<'tcx, Tag>],
377 ) -> InterpResult<'tcx, i32> {
378 let this = self.eval_context_mut();
380 this.check_no_isolation("fcntl")?;
383 throw_ub_format!("incorrect number of arguments for fcntl: got {}, expected at least 2", args.len());
385 let fd = this.read_scalar(args[0])?.to_i32()?;
386 let cmd = this.read_scalar(args[1])?.to_i32()?;
387 // We only support getting the flags for a descriptor.
388 if cmd == this.eval_libc_i32("F_GETFD")? {
389 // Currently this is the only flag that `F_GETFD` returns. It is OK to just return the
390 // `FD_CLOEXEC` value without checking if the flag is set for the file because `std`
391 // always sets this flag when opening a file. However we still need to check that the
392 // file itself is open.
393 let &[_, _] = check_arg_count(args)?;
394 if this.machine.file_handler.handles.contains_key(&fd) {
395 Ok(this.eval_libc_i32("FD_CLOEXEC")?)
397 this.handle_not_found()
399 } else if cmd == this.eval_libc_i32("F_DUPFD")?
400 || cmd == this.eval_libc_i32("F_DUPFD_CLOEXEC")?
402 // Note that we always assume the FD_CLOEXEC flag is set for every open file, in part
403 // because exec() isn't supported. The F_DUPFD and F_DUPFD_CLOEXEC commands only
404 // differ in whether the FD_CLOEXEC flag is pre-set on the new file descriptor,
405 // thus they can share the same implementation here.
406 let &[_, _, start] = check_arg_count(args)?;
407 let start = this.read_scalar(start)?.to_i32()?;
408 if fd < MIN_NORMAL_FILE_FD {
409 throw_unsup_format!("duplicating file descriptors for stdin, stdout, or stderr is not supported")
411 let fh = &mut this.machine.file_handler;
412 let (file_result, writable) = match fh.handles.get(&fd) {
413 Some(file_descriptor) => match file_descriptor.as_file_handle() {
414 Ok(FileHandle { file, writable }) => (file.try_clone(), writable.clone()),
415 Err(_) => return this.handle_not_found(),
417 None => return this.handle_not_found(),
419 let fd_result = file_result.map(|duplicated| {
420 fh.insert_fd_with_min_fd(FileHandle { file: duplicated, writable: writable }, start)
422 this.try_unwrap_io_result(fd_result)
423 } else if this.tcx.sess.target.target.target_os == "macos"
424 && cmd == this.eval_libc_i32("F_FULLFSYNC")?
426 let &[_, _] = check_arg_count(args)?;
427 if let Some(file_descriptor) = this.machine.file_handler.handles.get(&fd) {
428 match file_descriptor.as_file_handle() {
429 Ok(FileHandle { file, writable }) => {
430 let io_result = maybe_sync_file(&file, *writable, File::sync_all);
431 this.try_unwrap_io_result(io_result)
433 Err(_) => this.handle_not_found(),
436 this.handle_not_found()
439 throw_unsup_format!("the {:#x} command is not supported for `fcntl`)", cmd);
443 fn close(&mut self, fd_op: OpTy<'tcx, Tag>) -> InterpResult<'tcx, i32> {
444 let this = self.eval_context_mut();
446 this.check_no_isolation("close")?;
448 let fd = this.read_scalar(fd_op)?.to_i32()?;
450 if let Some(file_descriptor) = this.machine.file_handler.handles.remove(&fd) {
451 match file_descriptor.as_file_handle() {
452 Ok(FileHandle { file, writable }) => {
453 // We sync the file if it was opened in a mode different than read-only.
455 // `File::sync_all` does the checks that are done when closing a file. We do this to
456 // to handle possible errors correctly.
457 let result = this.try_unwrap_io_result(file.sync_all().map(|_| 0i32));
458 // Now we actually close the file.
460 // And return the result.
463 // We drop the file, this closes it but ignores any errors produced when closing
464 // it. This is done because `File::sync_all` cannot be done over files like
465 // `/dev/urandom` which are read-only. Check
466 // https://github.com/rust-lang/miri/issues/999#issuecomment-568920439 for a deeper
472 Err(_) => this.handle_not_found()
475 this.handle_not_found()
484 ) -> InterpResult<'tcx, i64> {
485 let this = self.eval_context_mut();
487 this.check_no_isolation("read")?;
490 trace!("Reading from FD {}, size {}", fd, count);
492 // Check that the *entire* buffer is actually valid memory.
493 this.memory.check_ptr_access(
495 Size::from_bytes(count),
496 Align::from_bytes(1).unwrap(),
499 // We cap the number of read bytes to the largest value that we are able to fit in both the
500 // host's and target's `isize`. This saves us from having to handle overflows later.
501 let count = count.min(this.machine_isize_max() as u64).min(isize::MAX as u64);
503 if let Some(file_descriptor) = this.machine.file_handler.handles.get_mut(&fd) {
504 trace!("read: FD mapped to {:?}", file_descriptor);
505 // We want to read at most `count` bytes. We are sure that `count` is not negative
506 // because it was a target's `usize`. Also we are sure that its smaller than
507 // `usize::MAX` because it is a host's `isize`.
508 let mut bytes = vec![0; count as usize];
509 // `File::read` never returns a value larger than `count`,
510 // so this cannot fail.
511 let result = file_descriptor
513 .map(|c| i64::try_from(c).unwrap());
517 // If reading to `bytes` did not fail, we write those bytes to the buffer.
518 this.memory.write_bytes(buf, bytes)?;
522 this.set_last_error_from_io_error(e)?;
527 trace!("read: FD not found");
528 this.handle_not_found()
537 ) -> InterpResult<'tcx, i64> {
538 let this = self.eval_context_mut();
540 this.check_no_isolation("write")?;
543 // Check that the *entire* buffer is actually valid memory.
544 this.memory.check_ptr_access(
546 Size::from_bytes(count),
547 Align::from_bytes(1).unwrap(),
550 // We cap the number of written bytes to the largest value that we are able to fit in both the
551 // host's and target's `isize`. This saves us from having to handle overflows later.
552 let count = count.min(this.machine_isize_max() as u64).min(isize::MAX as u64);
554 if let Some(file_descriptor) = this.machine.file_handler.handles.get_mut(&fd) {
555 let bytes = this.memory.read_bytes(buf, Size::from_bytes(count))?;
556 let result = file_descriptor
558 .map(|c| i64::try_from(c).unwrap());
559 this.try_unwrap_io_result(result)
561 this.handle_not_found()
567 fd_op: OpTy<'tcx, Tag>,
568 offset_op: OpTy<'tcx, Tag>,
569 whence_op: OpTy<'tcx, Tag>,
570 ) -> InterpResult<'tcx, i64> {
571 let this = self.eval_context_mut();
573 this.check_no_isolation("lseek64")?;
575 let fd = this.read_scalar(fd_op)?.to_i32()?;
576 let offset = this.read_scalar(offset_op)?.to_i64()?;
577 let whence = this.read_scalar(whence_op)?.to_i32()?;
579 let seek_from = if whence == this.eval_libc_i32("SEEK_SET")? {
580 SeekFrom::Start(u64::try_from(offset).unwrap())
581 } else if whence == this.eval_libc_i32("SEEK_CUR")? {
582 SeekFrom::Current(offset)
583 } else if whence == this.eval_libc_i32("SEEK_END")? {
584 SeekFrom::End(offset)
586 let einval = this.eval_libc("EINVAL")?;
587 this.set_last_error(einval)?;
591 if let Some(file_descriptor) = this.machine.file_handler.handles.get_mut(&fd) {
592 let result = file_descriptor
594 .map(|offset| i64::try_from(offset).unwrap());
595 this.try_unwrap_io_result(result)
597 this.handle_not_found()
601 fn unlink(&mut self, path_op: OpTy<'tcx, Tag>) -> InterpResult<'tcx, i32> {
602 let this = self.eval_context_mut();
604 this.check_no_isolation("unlink")?;
606 let path = this.read_path_from_c_str(this.read_scalar(path_op)?.not_undef()?)?;
608 let result = remove_file(path).map(|_| 0);
609 this.try_unwrap_io_result(result)
614 target_op: OpTy<'tcx, Tag>,
615 linkpath_op: OpTy<'tcx, Tag>
616 ) -> InterpResult<'tcx, i32> {
618 fn create_link(src: &Path, dst: &Path) -> std::io::Result<()> {
619 std::os::unix::fs::symlink(src, dst)
623 fn create_link(src: &Path, dst: &Path) -> std::io::Result<()> {
624 use std::os::windows::fs;
626 fs::symlink_dir(src, dst)
628 fs::symlink_file(src, dst)
632 let this = self.eval_context_mut();
634 this.check_no_isolation("symlink")?;
636 let target = this.read_path_from_c_str(this.read_scalar(target_op)?.not_undef()?)?;
637 let linkpath = this.read_path_from_c_str(this.read_scalar(linkpath_op)?.not_undef()?)?;
639 let result = create_link(&target, &linkpath).map(|_| 0);
640 this.try_unwrap_io_result(result)
645 path_op: OpTy<'tcx, Tag>,
646 buf_op: OpTy<'tcx, Tag>,
647 ) -> InterpResult<'tcx, i32> {
648 let this = self.eval_context_mut();
649 this.assert_target_os("macos", "stat");
650 this.check_no_isolation("stat")?;
651 // `stat` always follows symlinks.
652 this.macos_stat_or_lstat(true, path_op, buf_op)
655 // `lstat` is used to get symlink metadata.
658 path_op: OpTy<'tcx, Tag>,
659 buf_op: OpTy<'tcx, Tag>,
660 ) -> InterpResult<'tcx, i32> {
661 let this = self.eval_context_mut();
662 this.assert_target_os("macos", "lstat");
663 this.check_no_isolation("lstat")?;
664 this.macos_stat_or_lstat(false, path_op, buf_op)
669 fd_op: OpTy<'tcx, Tag>,
670 buf_op: OpTy<'tcx, Tag>,
671 ) -> InterpResult<'tcx, i32> {
672 let this = self.eval_context_mut();
674 this.assert_target_os("macos", "fstat");
675 this.check_no_isolation("fstat")?;
677 let fd = this.read_scalar(fd_op)?.to_i32()?;
679 let metadata = match FileMetadata::from_fd(this, fd)? {
680 Some(metadata) => metadata,
681 None => return Ok(-1),
683 this.macos_stat_write_buf(metadata, buf_op)
688 dirfd_op: OpTy<'tcx, Tag>, // Should be an `int`
689 pathname_op: OpTy<'tcx, Tag>, // Should be a `const char *`
690 flags_op: OpTy<'tcx, Tag>, // Should be an `int`
691 _mask_op: OpTy<'tcx, Tag>, // Should be an `unsigned int`
692 statxbuf_op: OpTy<'tcx, Tag>, // Should be a `struct statx *`
693 ) -> InterpResult<'tcx, i32> {
694 let this = self.eval_context_mut();
696 this.assert_target_os("linux", "statx");
697 this.check_no_isolation("statx")?;
699 let statxbuf_scalar = this.read_scalar(statxbuf_op)?.not_undef()?;
700 let pathname_scalar = this.read_scalar(pathname_op)?.not_undef()?;
702 // If the statxbuf or pathname pointers are null, the function fails with `EFAULT`.
703 if this.is_null(statxbuf_scalar)? || this.is_null(pathname_scalar)? {
704 let efault = this.eval_libc("EFAULT")?;
705 this.set_last_error(efault)?;
709 // Under normal circumstances, we would use `deref_operand(statxbuf_op)` to produce a
710 // proper `MemPlace` and then write the results of this function to it. However, the
711 // `syscall` function is untyped. This means that all the `statx` parameters are provided
712 // as `isize`s instead of having the proper types. Thus, we have to recover the layout of
713 // `statxbuf_op` by using the `libc::statx` struct type.
714 let statxbuf_place = {
715 // FIXME: This long path is required because `libc::statx` is an struct and also a
716 // function and `resolve_path` is returning the latter.
718 .resolve_path(&["libc", "unix", "linux_like", "linux", "gnu", "statx"])
719 .ty(*this.tcx, ty::ParamEnv::reveal_all());
720 let statxbuf_ty = this.tcx.mk_mut_ptr(statx_ty);
721 let statxbuf_layout = this.layout_of(statxbuf_ty)?;
722 let statxbuf_imm = ImmTy::from_scalar(statxbuf_scalar, statxbuf_layout);
723 this.ref_to_mplace(statxbuf_imm)?
726 let path = this.read_path_from_c_str(pathname_scalar)?.into_owned();
727 // `flags` should be a `c_int` but the `syscall` function provides an `isize`.
729 this.read_scalar(flags_op)?.to_machine_isize(&*this.tcx)?.try_into().map_err(|e| {
730 err_unsup_format!("failed to convert pointer sized operand to integer: {}", e)
732 let empty_path_flag = flags & this.eval_libc("AT_EMPTY_PATH")?.to_i32()? != 0;
733 // `dirfd` should be a `c_int` but the `syscall` function provides an `isize`.
735 this.read_scalar(dirfd_op)?.to_machine_isize(&*this.tcx)?.try_into().map_err(|e| {
736 err_unsup_format!("failed to convert pointer sized operand to integer: {}", e)
739 // * interpreting `path` as an absolute directory,
740 // * interpreting `path` as a path relative to `dirfd` when the latter is `AT_FDCWD`, or
741 // * interpreting `dirfd` as any file descriptor when `path` is empty and AT_EMPTY_PATH is
743 // Other behaviors cannot be tested from `libstd` and thus are not implemented. If you
744 // found this error, please open an issue reporting it.
746 path.is_absolute() ||
747 dirfd == this.eval_libc_i32("AT_FDCWD")? ||
748 (path.as_os_str().is_empty() && empty_path_flag)
751 "using statx is only supported with absolute paths, relative paths with the file \
752 descriptor `AT_FDCWD`, and empty paths with the `AT_EMPTY_PATH` flag set and any \
757 // the `_mask_op` paramter specifies the file information that the caller requested.
758 // However `statx` is allowed to return information that was not requested or to not
759 // return information that was requested. This `mask` represents the information we can
760 // actually provide for any target.
762 this.eval_libc("STATX_TYPE")?.to_u32()? | this.eval_libc("STATX_SIZE")?.to_u32()?;
764 // If the `AT_SYMLINK_NOFOLLOW` flag is set, we query the file's metadata without following
766 let follow_symlink = flags & this.eval_libc("AT_SYMLINK_NOFOLLOW")?.to_i32()? == 0;
768 // If the path is empty, and the AT_EMPTY_PATH flag is set, we query the open file
769 // represented by dirfd, whether it's a directory or otherwise.
770 let metadata = if path.as_os_str().is_empty() && empty_path_flag {
771 FileMetadata::from_fd(this, dirfd)?
773 FileMetadata::from_path(this, &path, follow_symlink)?
775 let metadata = match metadata {
776 Some(metadata) => metadata,
777 None => return Ok(-1),
780 // The `mode` field specifies the type of the file and the permissions over the file for
781 // the owner, its group and other users. Given that we can only provide the file type
782 // without using platform specific methods, we only set the bits corresponding to the file
783 // type. This should be an `__u16` but `libc` provides its values as `u32`.
784 let mode: u16 = metadata
788 .unwrap_or_else(|_| bug!("libc contains bad value for constant"));
790 // We need to set the corresponding bits of `mask` if the access, creation and modification
791 // times were available. Otherwise we let them be zero.
792 let (access_sec, access_nsec) = metadata.accessed.map(|tup| {
793 mask |= this.eval_libc("STATX_ATIME")?.to_u32()?;
794 InterpResult::Ok(tup)
795 }).unwrap_or(Ok((0, 0)))?;
797 let (created_sec, created_nsec) = metadata.created.map(|tup| {
798 mask |= this.eval_libc("STATX_BTIME")?.to_u32()?;
799 InterpResult::Ok(tup)
800 }).unwrap_or(Ok((0, 0)))?;
802 let (modified_sec, modified_nsec) = metadata.modified.map(|tup| {
803 mask |= this.eval_libc("STATX_MTIME")?.to_u32()?;
804 InterpResult::Ok(tup)
805 }).unwrap_or(Ok((0, 0)))?;
807 let __u32_layout = this.libc_ty_layout("__u32")?;
808 let __u64_layout = this.libc_ty_layout("__u64")?;
809 let __u16_layout = this.libc_ty_layout("__u16")?;
811 // Now we transform all this fields into `ImmTy`s and write them to `statxbuf`. We write a
812 // zero for the unavailable fields.
814 immty_from_uint_checked(mask, __u32_layout)?, // stx_mask
815 immty_from_uint_checked(0u128, __u32_layout)?, // stx_blksize
816 immty_from_uint_checked(0u128, __u64_layout)?, // stx_attributes
817 immty_from_uint_checked(0u128, __u32_layout)?, // stx_nlink
818 immty_from_uint_checked(0u128, __u32_layout)?, // stx_uid
819 immty_from_uint_checked(0u128, __u32_layout)?, // stx_gid
820 immty_from_uint_checked(mode, __u16_layout)?, // stx_mode
821 immty_from_uint_checked(0u128, __u16_layout)?, // statx padding
822 immty_from_uint_checked(0u128, __u64_layout)?, // stx_ino
823 immty_from_uint_checked(metadata.size, __u64_layout)?, // stx_size
824 immty_from_uint_checked(0u128, __u64_layout)?, // stx_blocks
825 immty_from_uint_checked(0u128, __u64_layout)?, // stx_attributes
826 immty_from_uint_checked(access_sec, __u64_layout)?, // stx_atime.tv_sec
827 immty_from_uint_checked(access_nsec, __u32_layout)?, // stx_atime.tv_nsec
828 immty_from_uint_checked(0u128, __u32_layout)?, // statx_timestamp padding
829 immty_from_uint_checked(created_sec, __u64_layout)?, // stx_btime.tv_sec
830 immty_from_uint_checked(created_nsec, __u32_layout)?, // stx_btime.tv_nsec
831 immty_from_uint_checked(0u128, __u32_layout)?, // statx_timestamp padding
832 immty_from_uint_checked(0u128, __u64_layout)?, // stx_ctime.tv_sec
833 immty_from_uint_checked(0u128, __u32_layout)?, // stx_ctime.tv_nsec
834 immty_from_uint_checked(0u128, __u32_layout)?, // statx_timestamp padding
835 immty_from_uint_checked(modified_sec, __u64_layout)?, // stx_mtime.tv_sec
836 immty_from_uint_checked(modified_nsec, __u32_layout)?, // stx_mtime.tv_nsec
837 immty_from_uint_checked(0u128, __u32_layout)?, // statx_timestamp padding
838 immty_from_uint_checked(0u128, __u64_layout)?, // stx_rdev_major
839 immty_from_uint_checked(0u128, __u64_layout)?, // stx_rdev_minor
840 immty_from_uint_checked(0u128, __u64_layout)?, // stx_dev_major
841 immty_from_uint_checked(0u128, __u64_layout)?, // stx_dev_minor
844 this.write_packed_immediates(statxbuf_place, &imms)?;
851 oldpath_op: OpTy<'tcx, Tag>,
852 newpath_op: OpTy<'tcx, Tag>,
853 ) -> InterpResult<'tcx, i32> {
854 let this = self.eval_context_mut();
856 this.check_no_isolation("rename")?;
858 let oldpath_scalar = this.read_scalar(oldpath_op)?.not_undef()?;
859 let newpath_scalar = this.read_scalar(newpath_op)?.not_undef()?;
861 if this.is_null(oldpath_scalar)? || this.is_null(newpath_scalar)? {
862 let efault = this.eval_libc("EFAULT")?;
863 this.set_last_error(efault)?;
867 let oldpath = this.read_path_from_c_str(oldpath_scalar)?;
868 let newpath = this.read_path_from_c_str(newpath_scalar)?;
870 let result = rename(oldpath, newpath).map(|_| 0);
872 this.try_unwrap_io_result(result)
877 path_op: OpTy<'tcx, Tag>,
878 mode_op: OpTy<'tcx, Tag>,
879 ) -> InterpResult<'tcx, i32> {
880 let this = self.eval_context_mut();
882 this.check_no_isolation("mkdir")?;
884 #[cfg_attr(not(unix), allow(unused_variables))]
885 let mode = if this.tcx.sess.target.target.target_os == "macos" {
886 u32::from(this.read_scalar(mode_op)?.not_undef()?.to_u16()?)
888 this.read_scalar(mode_op)?.to_u32()?
891 let path = this.read_path_from_c_str(this.read_scalar(path_op)?.not_undef()?)?;
893 #[cfg_attr(not(unix), allow(unused_mut))]
894 let mut builder = DirBuilder::new();
896 // If the host supports it, forward on the mode of the directory
897 // (i.e. permission bits and the sticky bit)
900 use std::os::unix::fs::DirBuilderExt;
901 builder.mode(mode.into());
904 let result = builder.create(path).map(|_| 0i32);
906 this.try_unwrap_io_result(result)
911 path_op: OpTy<'tcx, Tag>,
912 ) -> InterpResult<'tcx, i32> {
913 let this = self.eval_context_mut();
915 this.check_no_isolation("rmdir")?;
917 let path = this.read_path_from_c_str(this.read_scalar(path_op)?.not_undef()?)?;
919 let result = remove_dir(path).map(|_| 0i32);
921 this.try_unwrap_io_result(result)
924 fn opendir(&mut self, name_op: OpTy<'tcx, Tag>) -> InterpResult<'tcx, Scalar<Tag>> {
925 let this = self.eval_context_mut();
927 this.check_no_isolation("opendir")?;
929 let name = this.read_path_from_c_str(this.read_scalar(name_op)?.not_undef()?)?;
931 let result = read_dir(name);
935 let id = this.machine.dir_handler.insert_new(dir_iter);
937 // The libc API for opendir says that this method returns a pointer to an opaque
938 // structure, but we are returning an ID number. Thus, pass it as a scalar of
940 Ok(Scalar::from_machine_usize(id, this))
943 this.set_last_error_from_io_error(e)?;
944 Ok(Scalar::null_ptr(this))
949 fn linux_readdir64_r(
951 dirp_op: OpTy<'tcx, Tag>,
952 entry_op: OpTy<'tcx, Tag>,
953 result_op: OpTy<'tcx, Tag>,
954 ) -> InterpResult<'tcx, i32> {
955 let this = self.eval_context_mut();
957 this.assert_target_os("linux", "readdir64_r");
958 this.check_no_isolation("readdir64_r")?;
960 let dirp = this.read_scalar(dirp_op)?.to_machine_usize(this)?;
962 let dir_iter = this.machine.dir_handler.streams.get_mut(&dirp).ok_or_else(|| {
963 err_unsup_format!("the DIR pointer passed to readdir64_r did not come from opendir")
965 match dir_iter.next() {
966 Some(Ok(dir_entry)) => {
967 // Write into entry, write pointer to result, return 0 on success.
968 // The name is written with write_os_str_to_c_str, while the rest of the
969 // dirent64 struct is written using write_packed_immediates.
972 // pub struct dirent64 {
973 // pub d_ino: ino64_t,
974 // pub d_off: off64_t,
975 // pub d_reclen: c_ushort,
976 // pub d_type: c_uchar,
977 // pub d_name: [c_char; 256],
980 let entry_place = this.deref_operand(entry_op)?;
981 let name_place = this.mplace_field(entry_place, 4)?;
983 let file_name = dir_entry.file_name(); // not a Path as there are no separators!
984 let (name_fits, _) = this.write_os_str_to_c_str(
987 name_place.layout.size.bytes(),
990 throw_unsup_format!("a directory entry had a name too large to fit in libc::dirent64");
993 let entry_place = this.deref_operand(entry_op)?;
994 let ino64_t_layout = this.libc_ty_layout("ino64_t")?;
995 let off64_t_layout = this.libc_ty_layout("off64_t")?;
996 let c_ushort_layout = this.libc_ty_layout("c_ushort")?;
997 let c_uchar_layout = this.libc_ty_layout("c_uchar")?;
999 // If the host is a Unix system, fill in the inode number with its real value.
1000 // If not, use 0 as a fallback value.
1002 let ino = std::os::unix::fs::DirEntryExt::ino(&dir_entry);
1006 let file_type = this.file_type_to_d_type(dir_entry.file_type())?;
1009 immty_from_uint_checked(ino, ino64_t_layout)?, // d_ino
1010 immty_from_uint_checked(0u128, off64_t_layout)?, // d_off
1011 immty_from_uint_checked(0u128, c_ushort_layout)?, // d_reclen
1012 immty_from_int_checked(file_type, c_uchar_layout)?, // d_type
1014 this.write_packed_immediates(entry_place, &imms)?;
1016 let result_place = this.deref_operand(result_op)?;
1017 this.write_scalar(this.read_scalar(entry_op)?, result_place.into())?;
1022 // end of stream: return 0, assign *result=NULL
1023 this.write_null(this.deref_operand(result_op)?.into())?;
1026 Some(Err(e)) => match e.raw_os_error() {
1027 // return positive error number on error
1028 Some(error) => Ok(error),
1030 throw_unsup_format!("the error {} couldn't be converted to a return value", e)
1038 dirp_op: OpTy<'tcx, Tag>,
1039 entry_op: OpTy<'tcx, Tag>,
1040 result_op: OpTy<'tcx, Tag>,
1041 ) -> InterpResult<'tcx, i32> {
1042 let this = self.eval_context_mut();
1044 this.assert_target_os("macos", "readdir_r");
1045 this.check_no_isolation("readdir_r")?;
1047 let dirp = this.read_scalar(dirp_op)?.to_machine_usize(this)?;
1049 let dir_iter = this.machine.dir_handler.streams.get_mut(&dirp).ok_or_else(|| {
1050 err_unsup_format!("the DIR pointer passed to readdir_r did not come from opendir")
1052 match dir_iter.next() {
1053 Some(Ok(dir_entry)) => {
1054 // Write into entry, write pointer to result, return 0 on success.
1055 // The name is written with write_os_str_to_c_str, while the rest of the
1056 // dirent struct is written using write_packed_Immediates.
1059 // pub struct dirent {
1061 // pub d_seekoff: u64,
1062 // pub d_reclen: u16,
1063 // pub d_namlen: u16,
1065 // pub d_name: [c_char; 1024],
1068 let entry_place = this.deref_operand(entry_op)?;
1069 let name_place = this.mplace_field(entry_place, 5)?;
1071 let file_name = dir_entry.file_name(); // not a Path as there are no separators!
1072 let (name_fits, file_name_len) = this.write_os_str_to_c_str(
1075 name_place.layout.size.bytes(),
1078 throw_unsup_format!("a directory entry had a name too large to fit in libc::dirent");
1081 let entry_place = this.deref_operand(entry_op)?;
1082 let ino_t_layout = this.libc_ty_layout("ino_t")?;
1083 let off_t_layout = this.libc_ty_layout("off_t")?;
1084 let c_ushort_layout = this.libc_ty_layout("c_ushort")?;
1085 let c_uchar_layout = this.libc_ty_layout("c_uchar")?;
1087 // If the host is a Unix system, fill in the inode number with its real value.
1088 // If not, use 0 as a fallback value.
1090 let ino = std::os::unix::fs::DirEntryExt::ino(&dir_entry);
1094 let file_type = this.file_type_to_d_type(dir_entry.file_type())?;
1097 immty_from_uint_checked(ino, ino_t_layout)?, // d_ino
1098 immty_from_uint_checked(0u128, off_t_layout)?, // d_seekoff
1099 immty_from_uint_checked(0u128, c_ushort_layout)?, // d_reclen
1100 immty_from_uint_checked(file_name_len, c_ushort_layout)?, // d_namlen
1101 immty_from_int_checked(file_type, c_uchar_layout)?, // d_type
1103 this.write_packed_immediates(entry_place, &imms)?;
1105 let result_place = this.deref_operand(result_op)?;
1106 this.write_scalar(this.read_scalar(entry_op)?, result_place.into())?;
1111 // end of stream: return 0, assign *result=NULL
1112 this.write_null(this.deref_operand(result_op)?.into())?;
1115 Some(Err(e)) => match e.raw_os_error() {
1116 // return positive error number on error
1117 Some(error) => Ok(error),
1119 throw_unsup_format!("the error {} couldn't be converted to a return value", e)
1125 fn closedir(&mut self, dirp_op: OpTy<'tcx, Tag>) -> InterpResult<'tcx, i32> {
1126 let this = self.eval_context_mut();
1128 this.check_no_isolation("closedir")?;
1130 let dirp = this.read_scalar(dirp_op)?.to_machine_usize(this)?;
1132 if let Some(dir_iter) = this.machine.dir_handler.streams.remove(&dirp) {
1136 this.handle_not_found()
1142 fd_op: OpTy<'tcx, Tag>,
1143 length_op: OpTy<'tcx, Tag>,
1144 ) -> InterpResult<'tcx, i32> {
1145 let this = self.eval_context_mut();
1147 this.check_no_isolation("ftruncate64")?;
1149 let fd = this.read_scalar(fd_op)?.to_i32()?;
1150 let length = this.read_scalar(length_op)?.to_i64()?;
1151 if let Some(file_descriptor) = this.machine.file_handler.handles.get_mut(&fd) {
1152 match file_descriptor.as_file_handle() {
1153 Ok(FileHandle { file, writable }) => {
1155 if let Ok(length) = length.try_into() {
1156 let result = file.set_len(length);
1157 this.try_unwrap_io_result(result.map(|_| 0i32))
1159 let einval = this.eval_libc("EINVAL")?;
1160 this.set_last_error(einval)?;
1164 // The file is not writable
1165 let einval = this.eval_libc("EINVAL")?;
1166 this.set_last_error(einval)?;
1170 Err(_) => this.handle_not_found()
1173 this.handle_not_found()
1177 fn fsync(&mut self, fd_op: OpTy<'tcx, Tag>) -> InterpResult<'tcx, i32> {
1178 // On macOS, `fsync` (unlike `fcntl(F_FULLFSYNC)`) does not wait for the
1179 // underlying disk to finish writing. In the interest of host compatibility,
1180 // we conservatively implement this with `sync_all`, which
1181 // *does* wait for the disk.
1183 let this = self.eval_context_mut();
1185 this.check_no_isolation("fsync")?;
1187 let fd = this.read_scalar(fd_op)?.to_i32()?;
1188 if let Some(file_descriptor) = this.machine.file_handler.handles.get(&fd) {
1189 match file_descriptor.as_file_handle() {
1190 Ok(FileHandle { file, writable }) => {
1191 let io_result = maybe_sync_file(&file, *writable, File::sync_all);
1192 this.try_unwrap_io_result(io_result)
1194 Err(_) => this.handle_not_found()
1197 this.handle_not_found()
1201 fn fdatasync(&mut self, fd_op: OpTy<'tcx, Tag>) -> InterpResult<'tcx, i32> {
1202 let this = self.eval_context_mut();
1204 this.check_no_isolation("fdatasync")?;
1206 let fd = this.read_scalar(fd_op)?.to_i32()?;
1207 if let Some(file_descriptor) = this.machine.file_handler.handles.get(&fd) {
1208 match file_descriptor.as_file_handle() {
1209 Ok(FileHandle { file, writable }) => {
1210 let io_result = maybe_sync_file(&file, *writable, File::sync_data);
1211 this.try_unwrap_io_result(io_result)
1213 Err(_) => this.handle_not_found()
1216 this.handle_not_found()
1222 fd_op: OpTy<'tcx, Tag>,
1223 offset_op: OpTy<'tcx, Tag>,
1224 nbytes_op: OpTy<'tcx, Tag>,
1225 flags_op: OpTy<'tcx, Tag>,
1226 ) -> InterpResult<'tcx, i32> {
1227 let this = self.eval_context_mut();
1229 this.check_no_isolation("sync_file_range")?;
1231 let fd = this.read_scalar(fd_op)?.to_i32()?;
1232 let offset = this.read_scalar(offset_op)?.to_i64()?;
1233 let nbytes = this.read_scalar(nbytes_op)?.to_i64()?;
1234 let flags = this.read_scalar(flags_op)?.to_i32()?;
1236 if offset < 0 || nbytes < 0 {
1237 let einval = this.eval_libc("EINVAL")?;
1238 this.set_last_error(einval)?;
1241 let allowed_flags = this.eval_libc_i32("SYNC_FILE_RANGE_WAIT_BEFORE")?
1242 | this.eval_libc_i32("SYNC_FILE_RANGE_WRITE")?
1243 | this.eval_libc_i32("SYNC_FILE_RANGE_WAIT_AFTER")?;
1244 if flags & allowed_flags != flags {
1245 let einval = this.eval_libc("EINVAL")?;
1246 this.set_last_error(einval)?;
1250 if let Some(file_descriptor) = this.machine.file_handler.handles.get(&fd) {
1251 match file_descriptor.as_file_handle() {
1252 Ok(FileHandle { file, writable }) => {
1253 let io_result = maybe_sync_file(&file, *writable, File::sync_data);
1254 this.try_unwrap_io_result(io_result)
1256 Err(_) => this.handle_not_found()
1259 this.handle_not_found()
1264 /// Extracts the number of seconds and nanoseconds elapsed between `time` and the unix epoch when
1265 /// `time` is Ok. Returns `None` if `time` is an error. Fails if `time` happens before the unix
1267 fn extract_sec_and_nsec<'tcx>(
1268 time: std::io::Result<SystemTime>
1269 ) -> InterpResult<'tcx, Option<(u64, u32)>> {
1270 time.ok().map(|time| {
1271 let duration = system_time_to_duration(&time)?;
1272 Ok((duration.as_secs(), duration.subsec_nanos()))
1276 /// Stores a file's metadata in order to avoid code duplication in the different metadata related
1278 struct FileMetadata {
1281 created: Option<(u64, u32)>,
1282 accessed: Option<(u64, u32)>,
1283 modified: Option<(u64, u32)>,
1287 fn from_path<'tcx, 'mir>(
1288 ecx: &mut MiriEvalContext<'mir, 'tcx>,
1290 follow_symlink: bool
1291 ) -> InterpResult<'tcx, Option<FileMetadata>> {
1292 let metadata = if follow_symlink {
1293 std::fs::metadata(path)
1295 std::fs::symlink_metadata(path)
1298 FileMetadata::from_meta(ecx, metadata)
1301 fn from_fd<'tcx, 'mir>(
1302 ecx: &mut MiriEvalContext<'mir, 'tcx>,
1304 ) -> InterpResult<'tcx, Option<FileMetadata>> {
1305 let option = ecx.machine.file_handler.handles.get(&fd);
1306 let file = match option {
1307 Some(file_descriptor) => match file_descriptor.as_file_handle() {
1308 Ok(FileHandle { file, writable: _ }) => file,
1309 Err(_) => return ecx.handle_not_found().map(|_: i32| None),
1311 None => return ecx.handle_not_found().map(|_: i32| None),
1313 let metadata = file.metadata();
1315 FileMetadata::from_meta(ecx, metadata)
1318 fn from_meta<'tcx, 'mir>(
1319 ecx: &mut MiriEvalContext<'mir, 'tcx>,
1320 metadata: Result<std::fs::Metadata, std::io::Error>,
1321 ) -> InterpResult<'tcx, Option<FileMetadata>> {
1322 let metadata = match metadata {
1323 Ok(metadata) => metadata,
1325 ecx.set_last_error_from_io_error(e)?;
1330 let file_type = metadata.file_type();
1332 let mode_name = if file_type.is_file() {
1334 } else if file_type.is_dir() {
1340 let mode = ecx.eval_libc(mode_name)?;
1342 let size = metadata.len();
1344 let created = extract_sec_and_nsec(metadata.created())?;
1345 let accessed = extract_sec_and_nsec(metadata.accessed())?;
1346 let modified = extract_sec_and_nsec(metadata.modified())?;
1348 // FIXME: Provide more fields using platform specific methods.
1349 Ok(Some(FileMetadata { mode, size, created, accessed, modified }))