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use pty_process::Command as _;
use std::os::unix::process::ExitStatusExt as _;
use tokio::io::{AsyncReadExt as _, AsyncWriteExt as _};
mod raw_guard;
async fn run(
child: &mut pty_process::tokio::Child,
) -> std::result::Result<(), Box<dyn std::error::Error>> {
let _raw = raw_guard::RawGuard::new();
let mut in_buf = [0_u8; 4096];
let mut out_buf = [0_u8; 4096];
let mut stdin = tokio::io::stdin();
let mut stdout = tokio::io::stdout();
loop {
tokio::select! {
bytes = stdin.read(&mut in_buf) => match bytes {
Ok(bytes) => {
child.pty_mut().write_all(&in_buf[..bytes]).await.unwrap();
}
Err(e) => {
eprintln!("stdin read failed: {:?}", e);
break;
}
},
bytes = child.pty_mut().read(&mut out_buf) => match bytes {
Ok(bytes) => {
stdout.write_all(&out_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;
}
},
}
}
Ok(())
}
#[tokio::main]
async fn main() {
let mut child = tokio::process::Command::new("sleep")
.args(&["500"])
.spawn_pty(Some(&pty_process::Size::new(24, 80)))
.unwrap();
run(&mut child).await.unwrap();
let status = child.wait().await.unwrap();
std::process::exit(
status
.code()
.unwrap_or_else(|| status.signal().unwrap_or(0) + 128),
);
}
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