Function openpty_get_peer

tests/pty/openpty.rs:69–100

()

#[cfg(target_os = "linux")]
#[test]
fn openpty_get_peer() {
    // Use `CLOEXEC` if we can.
    #[cfg(any(linux_kernel, target_os = "freebsd", target_os = "netbsd"))]
    let flags = OpenptFlags::RDWR | OpenptFlags::NOCTTY | OpenptFlags::CLOEXEC;
    #[cfg(not(any(linux_kernel, target_os = "freebsd", target_os = "netbsd")))]
    let flags = OpenptFlags::RDWR | OpenptFlags::NOCTTY;

    let controller = openpt(flags).unwrap();

    grantpt(&controller).unwrap();
    unlockpt(&controller).unwrap();

    let user = ioctl_tiocgptpeer(
        &controller,
        OpenptFlags::RDWR | OpenptFlags::NOCTTY | OpenptFlags::CLOEXEC,
    )
    .unwrap();

    let mut controller = File::from(controller);
    let mut user = File::from(user);

    // The `'\x04'` is Ctrl-D, the default EOF control code.
    controller.write_all(b"Hello, world!\n\x04").unwrap();

    let mut s = String::new();

    // Read the string back. Our `\x04` above ended the stream, so we can
    // read to the end of the stream.
    user.read_to_string(&mut s).unwrap();

    assert_eq!(s, "Hello, world!\n");
}