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use std::io::{Read as _, Write as _};
use std::os::unix::io::AsRawFd as _;
use std::os::unix::process::ExitStatusExt as _;
use pty_process::Command as _;
struct RawGuard {
termios: nix::sys::termios::Termios,
}
impl RawGuard {
fn new() -> Self {
let stdin = std::io::stdin().as_raw_fd();
let termios = nix::sys::termios::tcgetattr(stdin).unwrap();
let mut termios_raw = termios.clone();
nix::sys::termios::cfmakeraw(&mut termios_raw);
nix::sys::termios::tcsetattr(
stdin,
nix::sys::termios::SetArg::TCSANOW,
&termios_raw,
)
.unwrap();
Self { termios }
}
}
impl Drop for RawGuard {
fn drop(&mut self) {
let stdin = std::io::stdin().as_raw_fd();
let _ = nix::sys::termios::tcsetattr(
stdin,
nix::sys::termios::SetArg::TCSANOW,
&self.termios,
);
}
}
fn run(child: &pty_process::Child) {
let _raw = RawGuard::new();
let mut buf = [0_u8; 4096];
let pty = child.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 child.pty().read(&mut buf) {
Ok(bytes) => {
let buf = &buf[..bytes];
let stdout = std::io::stdout();
let mut stdout = stdout.lock();
stdout.write_all(buf).unwrap();
stdout.flush().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;
}
};
}
if set.contains(stdin) {
match std::io::stdin().read(&mut buf) {
Ok(bytes) => {
let buf = &buf[..bytes];
child.pty().write_all(buf).unwrap();
}
Err(e) => {
eprintln!("stdin read failed: {:?}", e);
break;
}
}
}
}
}
Err(e) => {
println!("select failed: {:?}", e);
break;
}
}
}
}
fn main() {
let mut child = std::process::Command::new("sleep")
.args(&["500"])
.spawn_pty(Some(&pty_process::Size::new(24, 80)))
.unwrap();
run(&child);
let status = child.wait().unwrap();
std::process::exit(
status
.code()
.unwrap_or_else(|| status.signal().unwrap_or(0) + 128),
);
}
|
