Trait AsFd 

pub trait AsFd {
    // Required method
    fn as_fd(&self) -> BorrowedFd<'_>;
}

A trait to borrow the file descriptor from an underlying object.

This is only available on unix platforms and must be imported in order to call the method. Windows platforms have a corresponding AsHandle and AsSocket set of traits.

Required Methods

fn as_fd(&self) -> BorrowedFd<'_>

Borrows the file descriptor.

Example

use std::fs::File;

let mut f = File::open("foo.txt")?;
let borrowed_fd: BorrowedFd<'_> = f.as_fd();

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl AsFd for BorrowedFd<'_>

impl AsFd for std::process::ChildStderr

impl AsFd for compio::process::ChildStderr

impl AsFd for std::process::ChildStdin

impl AsFd for compio::process::ChildStdin

impl AsFd for std::process::ChildStdout

impl AsFd for compio::process::ChildStdout

impl AsFd for CurrentDir

impl AsFd for std::fs::Dir

impl AsFd for compio::fs::Dir

Available on Unix only.

impl AsFd for std::fs::File

Available on non-Trusty only.

impl AsFd for compio::fs::File

Available on Unix only.

impl AsFd for OwnedFd

impl AsFd for PidFd

impl AsFd for PipeReader

Available on non-Trusty only.

impl AsFd for PipeWriter

Available on non-Trusty only.

impl AsFd for Poller

impl AsFd for Receiver

impl AsFd for Receiver

Available on crate feature os-ext only.

impl AsFd for compio::fs::pipe::Receiver

Available on Unix only.

impl AsFd for Registry

Available on Unix and neither AIX nor Cygwin nor ESP-IDF nor Fuchsia nor GNU/Hurd nor Haiku nor Hermit nor Horizon nor NuttX nor Play Station Vita nor QNX SDP 7.x and non-mio_unsupported_force_poll_poll only.

impl AsFd for Sender

impl AsFd for Sender

Available on crate feature os-ext only.

impl AsFd for compio::fs::pipe::Sender

Available on Unix only.

impl AsFd for SignalFd

impl AsFd for Socket

impl AsFd for Stderr

impl AsFd for Stdin

impl AsFd for Stdout

impl AsFd for std::net::tcp::TcpListener

Available on non-Trusty only.

impl AsFd for TcpListener

impl AsFd for TcpListener

Available on Hermit or Unix or WASI only.

impl AsFd for compio::net::TcpListener

Available on Unix only.

impl AsFd for TcpSocket

Available on Unix, or WASI, or docsrs only.

impl AsFd for compio::net::TcpSocket

Available on Unix only.

impl AsFd for std::net::tcp::TcpStream

Available on non-Trusty only.

impl AsFd for TcpStream

impl AsFd for TcpStream

Available on Hermit or Unix or WASI only.

impl AsFd for compio::net::TcpStream

Available on Unix only.

impl AsFd for std::net::udp::UdpSocket

Available on non-Trusty only.

impl AsFd for UdpSocket

impl AsFd for UdpSocket

Available on Hermit or Unix or WASI only.

impl AsFd for compio::net::UdpSocket

Available on Unix only.

impl AsFd for std::os::unix::net::datagram::UnixDatagram

impl AsFd for UnixDatagram

impl AsFd for UnixDatagram

impl AsFd for std::os::unix::net::listener::UnixListener

impl AsFd for UnixListener

impl AsFd for UnixListener

impl AsFd for compio::net::UnixListener

Available on Unix only.

impl AsFd for UnixSocket

impl AsFd for compio::net::UnixSocket

Available on Unix only.

impl AsFd for std::os::unix::net::stream::UnixStream

impl AsFd for UnixStream

impl AsFd for UnixStream

impl AsFd for compio::net::UnixStream

Available on Unix only.

impl<'a> AsFd for StderrLock<'a>

impl<'a> AsFd for StdinLock<'a>

impl<'a> AsFd for StdoutLock<'a>

impl<'fd> AsFd for PollFd<'fd>

impl<T> AsFd for &T

where T: AsFd + ?Sized,

impl<T> AsFd for &mut T

where T: AsFd + ?Sized,

impl<T> AsFd for Arc<T>

where T: AsFd + ?Sized,

This impl allows implementing traits that require AsFd on Arc.

use std::net::UdpSocket;
use std::sync::Arc;

trait MyTrait: AsFd {}
impl MyTrait for Arc<UdpSocket> {}
impl MyTrait for Box<UdpSocket> {}

impl<T> AsFd for Async<T>

where T: AsFd,

Available on Unix only.

impl<T> AsFd for compio::runtime::fd::AsyncFd<T>

where T: AsFd,

impl<T> AsFd for AsyncFd<T>

where T: AsRawFd,

impl<T> AsFd for Box<T>

where T: AsFd + ?Sized,

impl<T> AsFd for compio::runtime::fd::PollFd<T>

where T: AsFd,

impl<T> AsFd for Rc<T>

where T: AsFd + ?Sized,

impl<T> AsFd for SharedFd<T>

where T: AsFd,

impl<T> AsFd for UniqueRc<T>

where T: AsFd + ?Sized,