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#[test]
fn test_pipe_basic() {
use std::os::unix::io::FromRawFd as _;
let (read_fd, write_fd) = nix::unistd::pipe().unwrap();
let mut child_from = std::process::Command::new("seq");
child_from.args(["1", "10"]);
child_from.stdout(unsafe { std::process::Stdio::from_raw_fd(write_fd) });
let mut child_to = std::process::Command::new("tac");
child_to.stdin(unsafe { std::process::Stdio::from_raw_fd(read_fd) });
child_to.stdout(std::process::Stdio::piped());
assert!(child_from.status().unwrap().success());
nix::unistd::close(write_fd).unwrap();
let output = child_to.output().unwrap();
assert!(output.status.success());
assert_eq!(output.stdout, b"10\n9\n8\n7\n6\n5\n4\n3\n2\n1\n");
}
#[cfg(feature = "todo")]
// TODO (hangs because i'm still overriding the configured fds)
// #[test]
fn test_pipe_async() {
use async_std::io::ReadExt as _;
use std::os::unix::io::FromRawFd as _;
let (status_from, status_to) = async_std::task::block_on(async {
let (read_fd, write_fd) = nix::unistd::pipe().unwrap();
let pty_from = pty_process::async_std::Pty::new().unwrap();
pty_from.resize(pty_process::Size::new(24, 80)).unwrap();
let mut cmd_from = pty_process::async_std::Command::new("seq");
cmd_from.args(["1", "10"]);
cmd_from
.stdout(unsafe { std::process::Stdio::from_raw_fd(write_fd) });
let mut child_from = cmd_from.spawn(pty_from).unwrap();
let pty_to = pty_process::async_std::Pty::new().unwrap();
pty_to.resize(pty_process::Size::new(24, 80)).unwrap();
let mut cmd_to = pty_process::async_std::Command::new("tac");
cmd_to.stdin(unsafe { std::process::Stdio::from_raw_fd(read_fd) });
let mut child_to = cmd_to.spawn(pty_to).unwrap();
// the pty will echo the written bytes back immediately, but the
// subprocess needs to generate its own output, which takes time, so
// we can't just read immediately (we may just get the echoed bytes).
// because the output generation is happening in the subprocess, we
// also don't have any way to know when (or if!) the subprocess will
// decide to send its output, so sleeping is the best we can do.
async_std::task::sleep(std::time::Duration::from_secs(1)).await;
let mut buf = [0u8; 1024];
let bytes = child_to.pty().read(&mut buf).await.unwrap();
assert_eq!(
&buf[..bytes],
b"10\r\n9\r\n8\r\n7\r\n6\r\n5\r\n4\r\n3\r\n2\r\n1\r\n"
);
(
child_from.status().await.unwrap(),
child_to.status().await.unwrap(),
)
});
assert_eq!(status_from.code().unwrap(), 0);
assert_eq!(status_to.code().unwrap(), 0);
}
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