1 #![unstable(reason = "not public", issue = "none", feature = "fd")]
3 use crate::io::{self, Read};
6 use crate::sys::hermit::abi;
7 use crate::sys::unsupported;
8 use crate::sys_common::AsInner;
16 pub fn new(fd: i32) -> FileDesc {
20 pub fn raw(&self) -> i32 {
24 /// Extracts the actual file descriptor without closing it.
25 pub fn into_raw(self) -> i32 {
31 pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
32 let result = unsafe { abi::read(self.fd, buf.as_mut_ptr(), buf.len()) };
36 pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> {
38 (&mut me).read_to_end(buf)
41 pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
42 let result = unsafe { abi::write(self.fd, buf.as_ptr(), buf.len()) };
46 pub fn duplicate(&self) -> io::Result<FileDesc> {
47 self.duplicate_path(&[])
49 pub fn duplicate_path(&self, _path: &[u8]) -> io::Result<FileDesc> {
53 pub fn nonblocking(&self) -> io::Result<bool> {
57 pub fn set_cloexec(&self) -> io::Result<()> {
61 pub fn set_nonblocking(&self, _nonblocking: bool) -> io::Result<()> {
66 impl<'a> Read for &'a FileDesc {
67 fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
72 impl AsInner<i32> for FileDesc {
73 fn as_inner(&self) -> &i32 {
78 impl Drop for FileDesc {
80 // Note that errors are ignored when closing a file descriptor. The
81 // reason for this is that if an error occurs we don't actually know if
82 // the file descriptor was closed or not, and if we retried (for
83 // something like EINTR), we might close another valid file descriptor
84 // (opened after we closed ours.
85 let _ = unsafe { abi::close(self.fd) };