Trait FromRawFd 

pub trait FromRawFd {
    // Required method
    unsafe fn from_raw_fd(fd: i32) -> Self;
}

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

Required Methods

unsafe fn from_raw_fd(fd: i32) -> 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 an owned file descriptor; in particular, it must be open.

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) };

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl FromRawFd for i32

impl FromRawFd for compio::fs::pipe::Receiver

Available on Unix only.

impl FromRawFd for compio::fs::pipe::Sender

Available on Unix only.

impl FromRawFd for compio::fs::Dir

Available on Unix only.

impl FromRawFd for compio::fs::File

Available on Unix only.

impl FromRawFd for compio::net::TcpListener

Available on Unix only.

impl FromRawFd for compio::net::TcpSocket

Available on Unix only.

impl FromRawFd for compio::net::TcpStream

Available on Unix only.

impl FromRawFd for compio::net::UdpSocket

Available on Unix only.

impl FromRawFd for compio::net::UnixListener

Available on Unix only.

impl FromRawFd for compio::net::UnixSocket

Available on Unix only.

impl FromRawFd for compio::net::UnixStream

Available on Unix only.

impl FromRawFd for std::fs::Dir

impl FromRawFd for std::fs::File

Available on non-Trusty only.

impl FromRawFd for PipeReader

Available on non-Trusty only.

impl FromRawFd for PipeWriter

Available on non-Trusty only.

impl FromRawFd for std::net::tcp::TcpListener

impl FromRawFd for std::net::tcp::TcpStream

impl FromRawFd for std::net::udp::UdpSocket

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

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

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

impl FromRawFd for Stdio

impl FromRawFd for OwnedFd

impl FromRawFd for Receiver

Available on crate feature os-ext only.

impl FromRawFd for Sender

Available on crate feature os-ext only.

impl FromRawFd for Socket

impl FromRawFd for TcpListener

Available on Unix or Hermit or WASI only.

impl FromRawFd for TcpSocket

Available on docsrs, or Unix, or WASI only.

impl FromRawFd for TcpStream

Available on Unix or Hermit or WASI only.

impl FromRawFd for UdpSocket

Available on Unix or Hermit or WASI only.

impl FromRawFd for UnixDatagram

impl FromRawFd for UnixListener

impl FromRawFd for UnixSocket

impl FromRawFd for UnixStream

impl<S> FromRawFd for Attacher<S>

where S: FromRawFd,

Available on Unix only.

impl<T> FromRawFd for AsyncFd<T>

where T: AsFd + FromRawFd,

impl<T> FromRawFd for SharedFd<T>

where T: FromRawFd,

Available on Unix only.