Function fstat

src/backend/linux_raw/fs/syscalls.rs:488–522

(fd: BorrowedFd<'_>)

#[inline]
pub(crate) fn fstat(fd: BorrowedFd<'_>) -> io::Result<Stat> {
    // 32-bit and mips64 Linux: `struct stat64` is not y2038 compatible; use
    // `statx`.
    //
    // And, some old platforms don't support `statx`, and some fail with a
    // confusing error code, so we call `crate::fs::statx` to handle that. If
    // `statx` isn't available, fall back to the buggy system call.
    #[cfg(any(
        target_pointer_width = "32",
        target_arch = "mips64",
        target_arch = "mips64r6"
    ))]
    {
        match crate::fs::statx(fd, cstr!(""), AtFlags::EMPTY_PATH, StatxFlags::BASIC_STATS) {
            Ok(x) => statx_to_stat(x),
            Err(io::Errno::NOSYS) => fstat_old(fd),
            Err(err) => Err(err),
        }
    }

    #[cfg(all(
        target_pointer_width = "64",
        not(target_arch = "mips64"),
        not(target_arch = "mips64r6")
    ))]
    unsafe {
        let mut result = MaybeUninit::<Stat>::uninit();
        ret(syscall!(__NR_fstat, fd, &mut result))?;

        #[cfg(sanitize_memory)]
        crate::msan::unpoison_maybe_uninit(&result);

        Ok(result.assume_init())
    }
}

#[cfg(any(
    target_pointer_width = "32",