Crate rx_runner 

Runtime-neutral child-process execution for polling event loops.

rx-runner tags stdout/stderr lines, bounds retained output, exposes non-blocking polling and cancellation, and reaps unfinished children on drop. It uses only the Rust standard library.

use std::time::Duration;
use rx_runner::CommandSpec;

let mut process = CommandSpec::new("rustc").arg("--version").spawn()?;
loop {
    let update = process.poll()?;
    for line in update.lines {
        println!("{:?}: {}", line.stream, line.text);
    }
    if update.exit.is_some() {
        break;
    }
    std::thread::sleep(Duration::from_millis(20));
}

Structs

CommandSpec

A program invocation with separate arguments and process options.

OutputLine

One decoded child-output line.

ProcessExit

Terminal child status.

ProcessUpdate

Output and optional terminal status produced by one poll.

RunningProcess

A running child process with non-blocking output/status polling.

Enums

OutputStream

Child output source.

Constants

DEFAULT_OUTPUT_CAPACITY

Default number of output lines retained between polls.