#[cfg(not(any(solarish, target_os = "haiku", target_os = "nto")))]
use super::types::FileType;
use crate::backend::c;
use crate::backend::conv::owned_fd;
use crate::fd::{AsFd, BorrowedFd};
use crate::ffi::{CStr, CString};
use crate::fs::{fcntl_getfl, fstat, openat, Mode, OFlags, Stat};
#[cfg(not(any(
solarish,
target_os = "haiku",
target_os = "netbsd",
target_os = "nto",
target_os = "redox",
target_os = "wasi",
)))]
use crate::fs::{fstatfs, StatFs};
#[cfg(not(any(solarish, target_os = "haiku", target_os = "redox", target_os = "wasi")))]
use crate::fs::{fstatvfs, StatVfs};
use crate::io;
#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
#[cfg(feature = "process")]
use crate::process::fchdir;
use alloc::borrow::ToOwned;
#[cfg(not(linux_like))]
use c::readdir as libc_readdir;
#[cfg(linux_like)]
use c::readdir64 as libc_readdir;
use core::fmt;
use core::ptr::NonNull;
use libc_errno::{errno, set_errno, Errno};
#[repr(transparent)]
pub struct Dir(NonNull<c::DIR>);
impl Dir {
#[inline]
pub fn read_from<Fd: AsFd>(fd: Fd) -> io::Result<Self> {
Self::_read_from(fd.as_fd())
}
#[inline]
fn _read_from(fd: BorrowedFd<'_>) -> io::Result<Self> {
let flags = fcntl_getfl(fd)?;
let fd_for_dir = openat(fd, cstr!("."), flags | OFlags::CLOEXEC, Mode::empty())?;
let raw = owned_fd(fd_for_dir);
unsafe {
let libc_dir = c::fdopendir(raw);
if let Some(libc_dir) = NonNull::new(libc_dir) {
Ok(Self(libc_dir))
} else {
let err = io::Errno::last_os_error();
let _ = c::close(raw);
Err(err)
}
}
}
#[inline]
pub fn rewind(&mut self) {
unsafe { c::rewinddir(self.0.as_ptr()) }
}
pub fn read(&mut self) -> Option<io::Result<DirEntry>> {
set_errno(Errno(0));
let dirent_ptr = unsafe { libc_readdir(self.0.as_ptr()) };
if dirent_ptr.is_null() {
let curr_errno = errno().0;
if curr_errno == 0 {
None
} else {
Some(Err(io::Errno(curr_errno)))
}
} else {
unsafe {
let dirent = &*dirent_ptr;
#[cfg(target_os = "openbsd")]
check_dirent_layout(dirent);
let result = DirEntry {
#[cfg(not(any(
solarish,
target_os = "aix",
target_os = "haiku",
target_os = "nto"
)))]
d_type: dirent.d_type,
#[cfg(not(any(freebsdlike, netbsdlike)))]
d_ino: dirent.d_ino,
#[cfg(any(freebsdlike, netbsdlike))]
d_fileno: dirent.d_fileno,
name: CStr::from_ptr(dirent.d_name.as_ptr()).to_owned(),
};
Some(Ok(result))
}
}
}
#[inline]
pub fn stat(&self) -> io::Result<Stat> {
fstat(unsafe { BorrowedFd::borrow_raw(c::dirfd(self.0.as_ptr())) })
}
#[cfg(not(any(
solarish,
target_os = "haiku",
target_os = "netbsd",
target_os = "nto",
target_os = "redox",
target_os = "wasi",
)))]
#[inline]
pub fn statfs(&self) -> io::Result<StatFs> {
fstatfs(unsafe { BorrowedFd::borrow_raw(c::dirfd(self.0.as_ptr())) })
}
#[cfg(not(any(solarish, target_os = "haiku", target_os = "redox", target_os = "wasi")))]
#[inline]
pub fn statvfs(&self) -> io::Result<StatVfs> {
fstatvfs(unsafe { BorrowedFd::borrow_raw(c::dirfd(self.0.as_ptr())) })
}
#[cfg(feature = "process")]
#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
#[cfg_attr(doc_cfg, doc(cfg(feature = "process")))]
#[inline]
pub fn chdir(&self) -> io::Result<()> {
fchdir(unsafe { BorrowedFd::borrow_raw(c::dirfd(self.0.as_ptr())) })
}
}
unsafe impl Send for Dir {}
impl Drop for Dir {
#[inline]
fn drop(&mut self) {
unsafe { c::closedir(self.0.as_ptr()) };
}
}
impl Iterator for Dir {
type Item = io::Result<DirEntry>;
#[inline]
fn next(&mut self) -> Option<Self::Item> {
Self::read(self)
}
}
impl fmt::Debug for Dir {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Dir")
.field("fd", unsafe { &c::dirfd(self.0.as_ptr()) })
.finish()
}
}
#[derive(Debug)]
pub struct DirEntry {
#[cfg(not(any(solarish, target_os = "aix", target_os = "haiku", target_os = "nto")))]
d_type: u8,
#[cfg(not(any(freebsdlike, netbsdlike)))]
d_ino: c::ino_t,
#[cfg(any(freebsdlike, netbsdlike))]
d_fileno: c::ino_t,
name: CString,
}
impl DirEntry {
#[inline]
pub fn file_name(&self) -> &CStr {
&self.name
}
#[cfg(not(any(solarish, target_os = "aix", target_os = "haiku", target_os = "nto")))]
#[inline]
pub fn file_type(&self) -> FileType {
FileType::from_dirent_d_type(self.d_type)
}
#[cfg(not(any(freebsdlike, netbsdlike)))]
#[inline]
pub fn ino(&self) -> u64 {
self.d_ino as u64
}
#[cfg(any(freebsdlike, netbsdlike))]
#[inline]
pub fn ino(&self) -> u64 {
#[allow(clippy::useless_conversion)]
self.d_fileno.into()
}
}
#[cfg(target_os = "openbsd")]
#[repr(C)]
#[derive(Debug)]
struct libc_dirent {
d_fileno: c::ino_t,
d_off: c::off_t,
d_reclen: u16,
d_type: u8,
d_namlen: u8,
__d_padding: [u8; 4],
d_name: [c::c_char; 256],
}
#[cfg(target_os = "openbsd")]
fn check_dirent_layout(dirent: &c::dirent) {
use crate::utils::as_ptr;
#[cfg(test)]
{
assert_eq_size!(libc_dirent, c::dirent);
assert_eq_size!(libc_dirent, c::dirent);
}
assert_eq!(
{
let z = libc_dirent {
d_fileno: 0_u64,
d_off: 0_i64,
d_reclen: 0_u16,
d_type: 0_u8,
d_namlen: 0_u8,
__d_padding: [0_u8; 4],
d_name: [0 as c::c_char; 256],
};
let base = as_ptr(&z) as usize;
(
(as_ptr(&z.d_fileno) as usize) - base,
(as_ptr(&z.d_off) as usize) - base,
(as_ptr(&z.d_reclen) as usize) - base,
(as_ptr(&z.d_type) as usize) - base,
(as_ptr(&z.d_namlen) as usize) - base,
(as_ptr(&z.d_name) as usize) - base,
)
},
{
let z = dirent;
let base = as_ptr(z) as usize;
(
(as_ptr(&z.d_fileno) as usize) - base,
(as_ptr(&z.d_off) as usize) - base,
(as_ptr(&z.d_reclen) as usize) - base,
(as_ptr(&z.d_type) as usize) - base,
(as_ptr(&z.d_namlen) as usize) - base,
(as_ptr(&z.d_name) as usize) - base,
)
}
);
}