Struct ChildStdout 

pub struct ChildStdout(/* private fields */);

A handle to a child process’s standard output (stdout).

When a ChildStdout is dropped, the underlying handle gets closed.

Implementations

impl ChildStdout

pub async fn into_stdio(self) -> Result<Stdio, Error>

Convert async_process::ChildStdout into std::process::Stdio.

You can use it to associate to the next process.

Examples

use async_process::Command;
use std::process::Stdio;
use std::io::Read;
use futures_lite::AsyncReadExt;

let mut ls_child = Command::new("ls").stdout(Stdio::piped()).spawn()?;
let stdio:Stdio = ls_child.stdout.take().unwrap().into_stdio().await?;

let mut echo_child = Command::new("echo").stdin(stdio).stdout(Stdio::piped()).spawn()?;
let mut buf = vec![];
echo_child.stdout.take().unwrap().read(&mut buf).await;

Trait Implementations

impl AsFd for ChildStdout

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

Borrows the file descriptor.

impl AsRawFd for ChildStdout

fn as_raw_fd(&self) -> i32

Extracts the raw file descriptor.

impl AsyncRead for ChildStdout

fn poll_read( self: Pin<&mut ChildStdout>, cx: &mut Context<'_>, buf: &mut [u8], ) -> Poll<Result<usize, Error>>

Attempt to read from the AsyncRead into buf.

fn poll_read_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &mut [IoSliceMut<'_>], ) -> Poll<Result<usize, Error>>

Attempt to read from the AsyncRead into bufs using vectored IO operations.

impl Debug for ChildStdout

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl ReadHalf for ChildStdout

fn recvmsg<'life0, 'life1, 'async_trait>( &'life0 mut self, buf: &'life1 mut [u8], ) -> Pin<Box<dyn Future<Output = Result<(usize, Vec<OwnedFd>), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, ChildStdout: 'async_trait,

Attempt to receive bytes from the socket.

fn receive_message<'life0, 'life1, 'life2, 'async_trait>( &'life0 mut self, seq: u64, already_received_bytes: &'life1 mut Vec<u8>, already_received_fds: &'life2 mut Vec<OwnedFd>, ) -> Pin<Box<dyn Future<Output = Result<Message, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, Self: 'async_trait,

Receive a message on the socket.

fn can_pass_unix_fd(&self) -> bool

Return whether passing file descriptors is supported.

fn peer_credentials<'life0, 'async_trait>( &'life0 mut self, ) -> Pin<Box<dyn Future<Output = Result<ConnectionCredentials, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, Self: 'async_trait,

The peer credentials.

fn auth_mechanism(&self) -> AuthMechanism

The authentication mechanism to use for this socket on the target OS.