Trait std::os::unix::io::AsFd

1.63.0 · source ·

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

Available on Unix only.

Expand description

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

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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();

Run

Implementors

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impl AsFd for File

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impl AsFd for Stderr

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impl AsFd for Stdin

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impl AsFd for Stdout

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impl AsFd for TcpListener

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impl AsFd for TcpStream

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impl AsFd for UdpSocket

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impl AsFd for ChildStderr

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impl AsFd for ChildStdin

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impl AsFd for ChildStdout

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impl AsFd for PidFd

Available on Linux only.

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impl AsFd for UnixDatagram

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impl AsFd for UnixListener

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impl AsFd for UnixStream

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impl AsFd for BorrowedFd<'_>

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impl AsFd for OwnedFd

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

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

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

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impl<T: AsFd> AsFd for &T

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impl<T: AsFd> AsFd for &mut T

1.64.0 · source

impl<T: AsFd> AsFd for Box<T>

1.64.0 · source

impl<T: AsFd> AsFd for Arc<T>

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> {}

Run