182     dirfd: RawFd,  in openat()
188         unsafe { libc::openat(dirfd, cstr.as_ptr(), oflag.bits(), mode.bits() as c_uint) }  in openat()
257     dirfd: Option<RawFd>,  in readlink_maybe_at()
262         match dirfd {  in readlink_maybe_at()
266             Some(dirfd) => libc::readlinkat(  in readlink_maybe_at()
267                 dirfd,  in readlink_maybe_at()
281 fn inner_readlink<P: ?Sized + NixPath>(dirfd: Option<RawFd>, path: &P) -> Result<OsString> {  in inner_readlink()
284     let res = readlink_maybe_at(dirfd, path, &mut v)?;  in inner_readlink()
292     let reported_size = match dirfd {  in inner_readlink()
296         Some(dirfd) => {  in inner_readlink()
298             super::sys::stat::fstatat(dirfd, path, flags | AtFlags::AT_SYMLINK_NOFOLLOW)  in inner_readlink()
301         Some(dirfd) => super::sys::stat::fstatat(dirfd, path, AtFlags::AT_SYMLINK_NOFOLLOW),  in inner_readlink()
317         let res = readlink_maybe_at(dirfd, path, &mut v)?;  in inner_readlink()
339 pub fn readlinkat<P: ?Sized + NixPath>(dirfd: RawFd, path: &P) -> Result<OsString> {  in readlinkat()
340     inner_readlink(Some(dirfd), path)  in readlinkat()