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use std::io::{Read as _, Write as _};
use std::os::unix::io::AsRawFd as _;
fn main() {
let mut cmd = pty_process::Command::new("cat").unwrap();
// cmd.args(&["--color=auto"]);
let mut child = cmd.spawn().unwrap();
let mut buf = [0_u8; 4096];
let pty = cmd.pty().as_raw_fd();
let stdin = std::io::stdin().as_raw_fd();
loop {
let mut set = nix::sys::select::FdSet::new();
set.insert(pty);
set.insert(stdin);
match nix::sys::select::select(None, Some(&mut set), None, None, None)
{
Ok(n) => {
if n > 0 {
if set.contains(pty) {
match cmd.pty().read(&mut buf) {
Ok(bytes) => {
let buf = &buf[..bytes];
print!(
"got {} bytes: '{}'",
bytes,
std::str::from_utf8(buf).unwrap()
);
std::io::stdout().flush().unwrap();
}
Err(e) => {
eprintln!("pty read failed: {:?}", e);
break;
}
};
}
if set.contains(stdin) {
match std::io::stdin().read(&mut buf) {
Ok(bytes) => {
let buf = &buf[..bytes];
cmd.pty().write_all(buf).unwrap();
}
Err(e) => {
eprintln!("stdin read failed: {:?}", e);
break;
}
}
}
}
}
Err(e) => println!("select failed: {:?}", e),
}
}
child.wait().unwrap();
}
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