std::os::unix::io::AsRawFd - Rust
Description: API documentation for the Rust `AsRawFd` trait in crate `std`.
Keywords: rust, rustlang, rust-lang, AsRawFd

# 1.0.0[−][src]Trait std::os::unix::io::AsRawFd

    pub trait AsRawFd {
        fn as_raw_fd(&self) -> RawFd;
    }

This is supported on Unix only.

A trait to extract the raw unix 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 `AsRawHandle` and `AsRawSocket` set of traits.

## Required methods

### `fn as_raw_fd(&self) -> RawFd`

This is supported on Unix only.

Extracts the raw file descriptor.

This method does not pass ownership of the raw file descriptor to the caller. The descriptor is only guaranteed to be valid while the original object has not yet been destroyed.

# Example

    use std::fs::File;
    use std::os::unix::io::{AsRawFd, RawFd};

    let mut f = File::open("foo.txt")?;
    // Note that `raw_fd` is only valid as long as `f` exists.
    let raw_fd: RawFd = f.as_raw_fd();

Run
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## Implementors

### `impl AsRawFd for File`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for Stderr`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for Stdin`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for Stdout`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for TcpListener`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for TcpStream`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for UdpSocket`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for UnixDatagram`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for UnixListener`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for UnixStream`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for ChildStderr`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for ChildStdin`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for ChildStdout`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl AsRawFd for RawFd`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl<'a> AsRawFd for StderrLock<'a>`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl<'a> AsRawFd for StdinLock<'a>`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.

### `impl<'a> AsRawFd for StdoutLock<'a>`[src]

#### `fn as_raw_fd(&self) -> RawFd`[src]

This is supported on Unix only.
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