main.rs

use std::process::{Command, Stdio};
use std::os::unix::net::UnixStream;
use std::os::unix::io::{AsRawFd,FromRawFd};

fn main() {
    let (_sock1, sock2) =  UnixStream::pair().unwrap();

    Command::new("sleep")
        .arg("200")
        .stdin(unsafe{Stdio::from_raw_fd(sock2.as_raw_fd())})
        .spawn()
        .expect("ls command failed to start");

    println!("Hello, world!");

    //std::thread::sleep(std::time::Duration::from_secs(4));
}