Use the new impl AsFd for &T support in io-lifetimes.

With rust-lang/rust#93888 now in nightly, and sunfishcode/io-lifetimes#18 now
in io-lifetimes 0.5.2, we can now simplify the `AsFd` pattern from
`fn foo<Fd: AsFd>(fd: &Fd)` to `fn foo<Fd: AsFd>(fd: Fd)`, without the `&`.

This also follows the emerging convention in std, as seen in the new
[`fchown`] function.

This means that users can now pass `BorrowedFd` values directly to
functions that expect `AsFd` arguments, without having to write an
extra `&` when passing them.

[`fchown`]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.fchown.html

Cargo.toml

@@ -20,7 +20,7 @@ cc = { version = "1.0.68", optional = true }
 [dependencies]
 bitflags = "1.2.1"
 itoa = { version = "1.0.1", default-features = false, optional = true }
-io-lifetimes = { version = "0.5.1", default-features = false, optional = true }
+io-lifetimes = { version = "0.5.2", default-features = false, optional = true }
 
 # Special dependencies used in rustc-dep-of-std mode.
 core = { version = "1.0.0", optional = true, package = "rustc-std-workspace-core" }

examples/stdio.rs

@@ -25,7 +25,8 @@ fn main() -> io::Result<()> {
 }
 
 #[cfg(not(windows))]
-fn show<Fd: AsFd>(fd: &Fd) -> io::Result<()> {
+fn show<Fd: AsFd>(fd: Fd) -> io::Result<()> {
+    let fd = fd.as_fd();
     if isatty(fd) {
         #[cfg(any(all(linux_raw, feature = "procfs"), libc))]
         println!(" - ttyname: {}", ttyname(fd, Vec::new())?.to_string_lossy());

src/fs/at.rs

@@ -40,7 +40,7 @@ use imp::fs::{Dev, FileType};
 /// [Linux]: https://man7.org/linux/man-pages/man2/open.2.html
 #[inline]
 pub fn openat<P: path::Arg, Fd: AsFd>(
-    dirfd: &Fd,
+    dirfd: Fd,
     path: P,
     oflags: OFlags,
     create_mode: Mode,
@@ -60,7 +60,7 @@ pub fn openat<P: path::Arg, Fd: AsFd>(
 /// [Linux]: https://man7.org/linux/man-pages/man2/readlinkat.2.html
 #[inline]
 pub fn readlinkat<P: path::Arg, Fd: AsFd, B: Into<Vec<u8>>>(
-    dirfd: &Fd,
+    dirfd: Fd,
     path: P,
     reuse: B,
 ) -> io::Result<ZString> {
@@ -97,7 +97,7 @@ fn _readlinkat(dirfd: BorrowedFd<'_>, path: &ZStr, mut buffer: Vec<u8>) -> io::R
 /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkdirat.html
 /// [Linux]: https://man7.org/linux/man-pages/man2/mkdirat.2.html
 #[inline]
-pub fn mkdirat<P: path::Arg, Fd: AsFd>(dirfd: &Fd, path: P, mode: Mode) -> io::Result<()> {
+pub fn mkdirat<P: path::Arg, Fd: AsFd>(dirfd: Fd, path: P, mode: Mode) -> io::Result<()> {
     path.into_with_z_str(|path| imp::fs::syscalls::mkdirat(dirfd.as_fd(), path, mode))
 }
 
@@ -112,9 +112,9 @@ pub fn mkdirat<P: path::Arg, Fd: AsFd>(dirfd: &Fd, path: P, mode: Mode) -> io::R
 /// [Linux]: https://man7.org/linux/man-pages/man2/linkat.2.html
 #[inline]
 pub fn linkat<P: path::Arg, Q: path::Arg, PFd: AsFd, QFd: AsFd>(
-    old_dirfd: &PFd,
+    old_dirfd: PFd,
     old_path: P,
-    new_dirfd: &QFd,
+    new_dirfd: QFd,
     new_path: Q,
     flags: AtFlags,
 ) -> io::Result<()> {
@@ -144,7 +144,7 @@ pub fn linkat<P: path::Arg, Q: path::Arg, PFd: AsFd, QFd: AsFd>(
 /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/unlinkat.html
 /// [Linux]: https://man7.org/linux/man-pages/man2/unlinkat.2.html
 #[inline]
-pub fn unlinkat<P: path::Arg, Fd: AsFd>(dirfd: &Fd, path: P, flags: AtFlags) -> io::Result<()> {
+pub fn unlinkat<P: path::Arg, Fd: AsFd>(dirfd: Fd, path: P, flags: AtFlags) -> io::Result<()> {
     path.into_with_z_str(|path| imp::fs::syscalls::unlinkat(dirfd.as_fd(), path, flags))
 }
 
@@ -159,9 +159,9 @@ pub fn unlinkat<P: path::Arg, Fd: AsFd>(dirfd: &Fd, path: P, flags: AtFlags) ->
 /// [Linux]: https://man7.org/linux/man-pages/man2/renameat.2.html
 #[inline]
 pub fn renameat<P: path::Arg, Q: path::Arg, PFd: AsFd, QFd: AsFd>(
-    old_dirfd: &PFd,
+    old_dirfd: PFd,
     old_path: P,
-    new_dirfd: &QFd,
+    new_dirfd: QFd,
     new_path: Q,
 ) -> io::Result<()> {
     old_path.into_with_z_str(|old_path| {
@@ -182,9 +182,9 @@ pub fn renameat<P: path::Arg, Q: path::Arg, PFd: AsFd, QFd: AsFd>(
 #[inline]
 #[doc(alias = "renameat2")]
 pub fn renameat_with<P: path::Arg, Q: path::Arg, PFd: AsFd, QFd: AsFd>(
-    old_dirfd: &PFd,
+    old_dirfd: PFd,
     old_path: P,
-    new_dirfd: &QFd,
+    new_dirfd: QFd,
     new_path: Q,
     flags: RenameFlags,
 ) -> io::Result<()> {
@@ -212,7 +212,7 @@ pub fn renameat_with<P: path::Arg, Q: path::Arg, PFd: AsFd, QFd: AsFd>(
 #[inline]
 pub fn symlinkat<P: path::Arg, Q: path::Arg, Fd: AsFd>(
     old_path: P,
-    new_dirfd: &Fd,
+    new_dirfd: Fd,
     new_path: Q,
 ) -> io::Result<()> {
     old_path.into_with_z_str(|old_path| {
@@ -237,7 +237,7 @@ pub fn symlinkat<P: path::Arg, Q: path::Arg, Fd: AsFd>(
 /// [`FileType::from_raw_mode`]: crate::fs::FileType::from_raw_mode
 #[inline]
 #[doc(alias = "fstatat")]
-pub fn statat<P: path::Arg, Fd: AsFd>(dirfd: &Fd, path: P, flags: AtFlags) -> io::Result<Stat> {
+pub fn statat<P: path::Arg, Fd: AsFd>(dirfd: Fd, path: P, flags: AtFlags) -> io::Result<Stat> {
     path.into_with_z_str(|path| imp::fs::syscalls::statat(dirfd.as_fd(), path, flags))
 }
 
@@ -254,7 +254,7 @@ pub fn statat<P: path::Arg, Fd: AsFd>(dirfd: &Fd, path: P, flags: AtFlags) -> io
 #[inline]
 #[doc(alias = "faccessat")]
 pub fn accessat<P: path::Arg, Fd: AsFd>(
-    dirfd: &Fd,
+    dirfd: Fd,
     path: P,
     access: Access,
     flags: AtFlags,
@@ -272,7 +272,7 @@ pub fn accessat<P: path::Arg, Fd: AsFd>(
 /// [Linux]: https://man7.org/linux/man-pages/man2/utimensat.2.html
 #[inline]
 pub fn utimensat<P: path::Arg, Fd: AsFd>(
-    dirfd: &Fd,
+    dirfd: Fd,
     path: P,
     times: &Timestamps,
     flags: AtFlags,
@@ -297,7 +297,7 @@ pub fn utimensat<P: path::Arg, Fd: AsFd>(
 #[cfg(not(target_os = "wasi"))]
 #[inline]
 #[doc(alias = "fchmodat")]
-pub fn chmodat<P: path::Arg, Fd: AsFd>(dirfd: &Fd, path: P, mode: Mode) -> io::Result<()> {
+pub fn chmodat<P: path::Arg, Fd: AsFd>(dirfd: Fd, path: P, mode: Mode) -> io::Result<()> {
     path.into_with_z_str(|path| imp::fs::syscalls::chmodat(dirfd.as_fd(), path, mode))
 }
 
@@ -331,7 +331,7 @@ pub fn fclonefileat<Fd: AsFd, DstFd: AsFd, P: path::Arg>(
 #[cfg(not(any(target_os = "ios", target_os = "macos", target_os = "wasi")))]
 #[inline]
 pub fn mknodat<P: path::Arg, Fd: AsFd>(
-    dirfd: &Fd,
+    dirfd: Fd,
     path: P,
     file_type: FileType,
     mode: Mode,
@@ -354,7 +354,7 @@ pub fn mknodat<P: path::Arg, Fd: AsFd>(
 #[cfg(not(any(target_os = "wasi")))]
 #[inline]
 pub fn chownat<P: path::Arg, Fd: AsFd>(
-    dirfd: &Fd,
+    dirfd: Fd,
     path: P,
     owner: Uid,
     group: Gid,

src/fs/fadvise.rs

@@ -14,6 +14,6 @@ pub use imp::fs::Advice;
 /// [Linux]: https://man7.org/linux/man-pages/man2/posix_fadvise.2.html
 #[inline]
 #[doc(alias = "posix_fadvise")]
-pub fn fadvise<Fd: AsFd>(fd: &Fd, offset: u64, len: u64, advice: Advice) -> io::Result<()> {
+pub fn fadvise<Fd: AsFd>(fd: Fd, offset: u64, len: u64, advice: Advice) -> io::Result<()> {
     imp::fs::syscalls::fadvise(fd.as_fd(), offset, len, advice)
 }

src/fs/fcntl.rs

@@ -18,7 +18,7 @@ use imp::fs::{FdFlags, OFlags};
 /// [Linux]: https://man7.org/linux/man-pages/man2/fcntl.2.html
 #[inline]
 #[doc(alias = "F_GETFD")]
-pub fn fcntl_getfd<Fd: AsFd>(fd: &Fd) -> io::Result<FdFlags> {
+pub fn fcntl_getfd<Fd: AsFd>(fd: Fd) -> io::Result<FdFlags> {
     imp::fs::syscalls::fcntl_getfd(fd.as_fd())
 }
 
@@ -32,7 +32,7 @@ pub fn fcntl_getfd<Fd: AsFd>(fd: &Fd) -> io::Result<FdFlags> {
 /// [Linux]: https://man7.org/linux/man-pages/man2/fcntl.2.html
 #[inline]
 #[doc(alias = "F_SETFD")]
-pub fn fcntl_setfd<Fd: AsFd>(fd: &Fd, flags: FdFlags) -> io::Result<()> {
+pub fn fcntl_setfd<Fd: AsFd>(fd: Fd, flags: FdFlags) -> io::Result<()> {
     imp::fs::syscalls::fcntl_setfd(fd.as_fd(), flags)
 }
 
@@ -46,7 +46,7 @@ pub fn fcntl_setfd<Fd: AsFd>(fd: &Fd, flags: FdFlags) -> io::Result<()> {
 /// [Linux]: https://man7.org/linux/man-pages/man2/fcntl.2.html
 #[inline]
 #[doc(alias = "F_GETFL")]
-pub fn fcntl_getfl<Fd: AsFd>(fd: &Fd) -> io::Result<OFlags> {
+pub fn fcntl_getfl<Fd: AsFd>(fd: Fd) -> io::Result<OFlags> {
     imp::fs::syscalls::fcntl_getfl(fd.as_fd())
 }
 
@@ -60,7 +60,7 @@ pub fn fcntl_getfl<Fd: AsFd>(fd: &Fd) -> io::Result<OFlags> {
 /// [Linux]: https://man7.org/linux/man-pages/man2/fcntl.2.html
 #[inline]
 #[doc(alias = "F_SETFL")]
-pub fn fcntl_setfl<Fd: AsFd>(fd: &Fd, flags: OFlags) -> io::Result<()> {
+pub fn fcntl_setfl<Fd: AsFd>(fd: Fd, flags: OFlags) -> io::Result<()> {
     imp::fs::syscalls::fcntl_setfl(fd.as_fd(), flags)
 }
 
@@ -78,7 +78,7 @@ pub fn fcntl_setfl<Fd: AsFd>(fd: &Fd, flags: OFlags) -> io::Result<()> {
 ))]
 #[inline]
 #[doc(alias = "F_GET_SEALS")]
-pub fn fcntl_get_seals<Fd: AsFd>(fd: &Fd) -> io::Result<SealFlags> {
+pub fn fcntl_get_seals<Fd: AsFd>(fd: Fd) -> io::Result<SealFlags> {
     imp::fs::syscalls::fcntl_get_seals(fd.as_fd())
 }
 
@@ -104,7 +104,7 @@ pub use imp::fs::SealFlags;
 ))]
 #[inline]
 #[doc(alias = "F_ADD_SEALS")]
-pub fn fcntl_add_seals<Fd: AsFd>(fd: &Fd, seals: SealFlags) -> io::Result<()> {
+pub fn fcntl_add_seals<Fd: AsFd>(fd: Fd, seals: SealFlags) -> io::Result<()> {
     imp::fs::syscalls::fcntl_add_seals(fd.as_fd(), seals)
 }
 
@@ -126,6 +126,6 @@ pub fn fcntl_add_seals<Fd: AsFd>(fd: &Fd, seals: SealFlags) -> io::Result<()> {
 #[cfg(not(target_os = "wasi"))]
 #[inline]
 #[doc(alias = "F_DUPFD_CLOEXEC")]
-pub fn fcntl_dupfd_cloexec<Fd: AsFd>(fd: &Fd, min: RawFd) -> io::Result<OwnedFd> {
+pub fn fcntl_dupfd_cloexec<Fd: AsFd>(fd: Fd, min: RawFd) -> io::Result<OwnedFd> {
     imp::fs::syscalls::fcntl_dupfd_cloexec(fd.as_fd(), min)
 }

src/fs/fcntl_darwin.rs

@@ -8,7 +8,7 @@ use imp::fd::AsFd;
 ///
 /// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html
 #[inline]
-pub fn fcntl_rdadvise<Fd: AsFd>(fd: &Fd, offset: u64, len: u64) -> io::Result<()> {
+pub fn fcntl_rdadvise<Fd: AsFd>(fd: Fd, offset: u64, len: u64) -> io::Result<()> {
     imp::fs::syscalls::fcntl_rdadvise(fd.as_fd(), offset, len)
 }
 
@@ -19,6 +19,6 @@ pub fn fcntl_rdadvise<Fd: AsFd>(fd: &Fd, offset: u64, len: u64) -> io::Result<()
 ///
 /// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html
 #[inline]
-pub fn fcntl_fullfsync<Fd: AsFd>(fd: &Fd) -> io::Result<()> {
+pub fn fcntl_fullfsync<Fd: AsFd>(fd: Fd) -> io::Result<()> {
     imp::fs::syscalls::fcntl_fullfsync(fd.as_fd())
 }

src/fs/fd.rs

@@ -35,7 +35,7 @@ use imp::fs::{FlockOperation, Mode};
 /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/lseek.html
 /// [Linux]: https://man7.org/linux/man-pages/man2/lseek.2.html
 #[inline]
-pub fn seek<Fd: AsFd>(fd: &Fd, pos: SeekFrom) -> io::Result<u64> {
+pub fn seek<Fd: AsFd>(fd: Fd, pos: SeekFrom) -> io::Result<u64> {
     imp::fs::syscalls::seek(fd.as_fd(), pos)
 }
 
@@ -52,7 +52,7 @@ pub fn seek<Fd: AsFd>(fd: &Fd, pos: SeekFrom) -> io::Result<u64> {
 /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/lseek.html
 /// [Linux]: https://man7.org/linux/man-pages/man2/lseek.2.html
 #[inline]
-pub fn tell<Fd: AsFd>(fd: &Fd) -> io::Result<u64> {
+pub fn tell<Fd: AsFd>(fd: Fd) -> io::Result<u64> {
     imp::fs::syscalls::tell(fd.as_fd())
 }
 
@@ -69,7 +69,7 @@ pub fn tell<Fd: AsFd>(fd: &Fd) -> io::Result<u64> {
 /// [Linux]: https://man7.org/linux/man-pages/man2/fchmod.2.html
 #[cfg(not(target_os = "wasi"))]
 #[inline]
-pub fn fchmod<Fd: AsFd>(fd: &Fd, mode: Mode) -> io::Result<()> {
+pub fn fchmod<Fd: AsFd>(fd: Fd, mode: Mode) -> io::Result<()> {
     imp::fs::syscalls::fchmod(fd.as_fd(), mode)
 }
 
@@ -83,7 +83,7 @@ pub fn fchmod<Fd: AsFd>(fd: &Fd, mode: Mode) -> io::Result<()> {
 /// [Linux]: https://man7.org/linux/man-pages/man2/fchown.2.html
 #[cfg(not(target_os = "wasi"))]
 #[inline]
-pub fn fchown<Fd: AsFd>(fd: &Fd, owner: Uid, group: Gid) -> io::Result<()> {
+pub fn fchown<Fd: AsFd>(fd: Fd, owner: Uid, group: Gid) -> io::Result<()> {
     imp::fs::syscalls::fchown(fd.as_fd(), owner, group)
 }
 
@@ -101,7 +101,7 @@ pub fn fchown<Fd: AsFd>(fd: &Fd, owner: Uid, group: Gid) -> io::Result<()> {
 /// [`Mode::from_raw_mode`]: crate::fs::Mode::from_raw_mode
 /// [`FileType::from_raw_mode`]: crate::fs::FileType::from_raw_mode
 #[inline]
-pub fn fstat<Fd: AsFd>(fd: &Fd) -> io::Result<Stat> {
+pub fn fstat<Fd: AsFd>(fd: Fd) -> io::Result<Stat> {
     imp::fs::syscalls::fstat(fd.as_fd())
 }
 
@@ -118,7 +118,7 @@ pub fn fstat<Fd: AsFd>(fd: &Fd) -> io::Result<Stat> {
     target_os = "wasi"
 )))] // not implemented in libc for netbsd yet
 #[inline]
-pub fn fstatfs<Fd: AsFd>(fd: &Fd) -> io::Result<StatFs> {
+pub fn fstatfs<Fd: AsFd>(fd: Fd) -> io::Result<StatFs> {
     imp::fs::syscalls::fstatfs(fd.as_fd())
 }
 
@@ -131,7 +131,7 @@ pub fn fstatfs<Fd: AsFd>(fd: &Fd) -> io::Result<StatFs> {
 /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/futimens.html
 /// [Linux]: https://man7.org/linux/man-pages/man2/utimensat.2.html
 #[inline]
-pub fn futimens<Fd: AsFd>(fd: &Fd, times: &Timestamps) -> io::Result<()> {
+pub fn futimens<Fd: AsFd>(fd: Fd, times: &Timestamps) -> io::Result<()> {
     imp::fs::syscalls::futimens(fd.as_fd(), times)
 }
 
@@ -159,7 +159,7 @@ pub fn futimens<Fd: AsFd>(fd: &Fd, times: &Timestamps) -> io::Result<()> {
 )))] // not implemented in libc for netbsd yet
 #[inline]
 #[doc(alias = "posix_fallocate")]
-pub fn fallocate<Fd: AsFd>(fd: &Fd, mode: FallocateFlags, offset: u64, len: u64) -> io::Result<()> {
+pub fn fallocate<Fd: AsFd>(fd: Fd, mode: FallocateFlags, offset: u64, len: u64) -> io::Result<()> {
     imp::fs::syscalls::fallocate(fd.as_fd(), mode, offset, len)
 }
 
@@ -170,7 +170,7 @@ pub fn fallocate<Fd: AsFd>(fd: &Fd, mode: FallocateFlags, offset: u64, len: u64)
 /// example, it doesn't reflect whether sockets have been shut down; for
 /// general I/O handle support, use [`io::is_read_write`].
 #[inline]
-pub fn is_file_read_write<Fd: AsFd>(fd: &Fd) -> io::Result<(bool, bool)> {
+pub fn is_file_read_write<Fd: AsFd>(fd: Fd) -> io::Result<(bool, bool)> {
     _is_file_read_write(fd.as_fd())
 }
 
@@ -212,7 +212,7 @@ pub(crate) fn _is_file_read_write(fd: BorrowedFd<'_>) -> io::Result<(bool, bool)
 /// [Linux]: https://man7.org/linux/man-pages/man2/fsync.2.html
 /// [`fcntl_fullfsync`]: https://docs.rs/rustix/*/x86_64-apple-darwin/rustix/fs/fn.fcntl_fullfsync.html
 #[inline]
-pub fn fsync<Fd: AsFd>(fd: &Fd) -> io::Result<()> {
+pub fn fsync<Fd: AsFd>(fd: Fd) -> io::Result<()> {
     imp::fs::syscalls::fsync(fd.as_fd())
 }
 
@@ -232,7 +232,7 @@ pub fn fsync<Fd: AsFd>(fd: &Fd) -> io::Result<()> {
     target_os = "redox"
 )))]
 #[inline]
-pub fn fdatasync<Fd: AsFd>(fd: &Fd) -> io::Result<()> {
+pub fn fdatasync<Fd: AsFd>(fd: Fd) -> io::Result<()> {
     imp::fs::syscalls::fdatasync(fd.as_fd())
 }
 
@@ -245,7 +245,7 @@ pub fn fdatasync<Fd: AsFd>(fd: &Fd) -> io::Result<()> {
 /// [POSIX]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/ftruncate.html
 /// [Linux]: https://man7.org/linux/man-pages/man2/ftruncate.2.html
 #[inline]
-pub fn ftruncate<Fd: AsFd>(fd: &Fd, length: u64) -> io::Result<()> {
+pub fn ftruncate<Fd: AsFd>(fd: Fd, length: u64) -> io::Result<()> {
     imp::fs::syscalls::ftruncate(fd.as_fd(), length)
 }
 
@@ -257,6 +257,6 @@ pub fn ftruncate<Fd: AsFd>(fd: &Fd, length: u64) -> io::Result<()> {
 /// [Linux]: https://man7.org/linux/man-pages/man2/flock.2.html
 #[cfg(not(target_os = "wasi"))]
 #[inline]
-pub fn flock<Fd: AsFd>(fd: &Fd, operation: FlockOperation) -> io::Result<()> {
+pub fn flock<Fd: AsFd>(fd: Fd, operation: FlockOperation) -> io::Result<()> {
     imp::fs::syscalls::flock(fd.as_fd(), operation)
 }

src/fs/getpath.rs

@@ -9,6 +9,6 @@ use imp::fd::AsFd;
 ///
 /// [Apple]: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fcntl.2.html
 #[inline]
-pub fn getpath<Fd: AsFd>(fd: &Fd) -> io::Result<ZString> {
+pub fn getpath<Fd: AsFd>(fd: Fd) -> io::Result<ZString> {
     imp::fs::syscalls::getpath(fd.as_fd())
 }

src/fs/openat2.rs

@@ -11,7 +11,7 @@ use imp::fs::{Mode, OFlags, ResolveFlags};
 /// [Linux]: https://man7.org/linux/man-pages/man2/openat2.2.html
 #[inline]
 pub fn openat2<Fd: AsFd, P: path::Arg>(
-    dirfd: &Fd,
+    dirfd: Fd,
     path: P,
     oflags: OFlags,
     mode: Mode,

src/fs/sendfile.rs

@@ -10,8 +10,8 @@ use imp::fd::AsFd;
 #[cfg(any(linux_raw, all(libc, any(target_os = "android", target_os = "linux"))))]
 #[inline]
 pub fn sendfile<OutFd: AsFd, InFd: AsFd>(
-    out_fd: &OutFd,
-    in_fd: &InFd,
+    out_fd: OutFd,
+    in_fd: InFd,
     offset: Option<&mut u64>,
     count: usize,
 ) -> io::Result<usize> {

src/fs/statx.rs

@@ -18,7 +18,7 @@ pub use imp::fs::StatxFlags;
 /// [Linux]: https://man7.org/linux/man-pages/man2/statx.2.html
 #[inline]
 pub fn statx<P: path::Arg, Fd: AsFd>(
-    dirfd: &Fd,
+    dirfd: Fd,
     path: P,
     flags: AtFlags,
     mask: StatxFlags,