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use async_std::io::prelude::WriteExt as _;
use async_std::io::ReadExt as _;
use async_std::prelude::FutureExt as _;
use pty_process::Command as _;
use std::os::unix::process::ExitStatusExt as _;
mod raw_guard;
async fn run(
child: &pty_process::async_std::Child,
) -> std::result::Result<(), Box<dyn std::error::Error + '_>> {
let _raw = raw_guard::RawGuard::new();
let ex = async_executor::Executor::new();
let input = ex.spawn(async {
let mut buf = [0_u8; 4096];
let mut stdin = async_std::io::stdin();
loop {
match stdin.read(&mut buf).await {
Ok(bytes) => {
child.pty().write_all(&buf[..bytes]).await.unwrap();
}
Err(e) => {
eprintln!("stdin read failed: {:?}", e);
break;
}
}
}
});
let output = ex.spawn(async {
let mut buf = [0_u8; 4096];
let mut stdout = async_std::io::stdout();
loop {
match child.pty().read(&mut buf).await {
Ok(bytes) => {
stdout.write_all(&buf[..bytes]).await.unwrap();
stdout.flush().await.unwrap();
}
Err(e) => {
// EIO means that the process closed the other
// end of the pty
if e.raw_os_error() != Some(libc::EIO) {
eprintln!("pty read failed: {:?}", e);
}
break;
}
}
}
});
ex.run(input.race(output)).await;
Ok(())
}
fn main() {
let status = async_std::task::block_on(async {
let mut child = async_std::process::Command::new("sleep")
.args(&["500"])
.spawn_pty(Some(&pty_process::Size::new(24, 80)))
.unwrap();
run(&child).await.unwrap();
child.status().await.unwrap()
});
std::process::exit(
status
.code()
.unwrap_or_else(|| status.signal().unwrap_or(0) + 128),
);
}
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