Trait std::os::fd::FromRawFd

1.1.0 · source ·
pub trait FromRawFd {
    unsafe fn from_raw_fd(fd: RawFd) -> Self;
}
Expand description

A trait to express the ability to construct an object from a raw file descriptor.

Required Methods§

source

unsafe fn from_raw_fd(fd: RawFd) -> Self

Constructs a new instance of Self from the given raw file descriptor.

This function is typically used to consume ownership of the specified file descriptor. When used in this way, the returned object will take responsibility for closing it when the object goes out of scope.

However, consuming ownership is not strictly required. Use a From<OwnedFd>::from implementation for an API which strictly consumes ownership.

Safety

The fd passed in must be a valid and open file descriptor.

Example
use std::fs::File;
#[cfg(any(unix, target_os = "wasi"))]
use std::os::fd::{FromRawFd, IntoRawFd, RawFd};

let f = File::open("foo.txt")?;
let raw_fd: RawFd = f.into_raw_fd();
// SAFETY: no other functions should call `from_raw_fd`, so there
// is only one owner for the file descriptor.
let f = unsafe { File::from_raw_fd(raw_fd) };
Run

Implementors§

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impl FromRawFd for File

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impl FromRawFd for TcpListener

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impl FromRawFd for TcpStream

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impl FromRawFd for UdpSocket

1.2.0 · source§

impl FromRawFd for Stdio

Available on Unix only.
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impl FromRawFd for PidFd

Available on Linux only.
1.10.0 · source§

impl FromRawFd for UnixDatagram

Available on Unix only.
1.10.0 · source§

impl FromRawFd for UnixListener

Available on Unix only.
1.10.0 · source§

impl FromRawFd for UnixStream

Available on Unix only.
1.63.0 · source§

impl FromRawFd for OwnedFd

1.48.0 · source§

impl FromRawFd for RawFd