// run-pass
#![allow(unused_imports)]
#![allow(deprecated)]

// ignore-android since the dynamic linker sets a SIGPIPE handler (to do
// a crash report) so inheritance is moot on the entire platform

// libstd ignores SIGPIPE, and other libraries may set signal masks.
// Make sure that these behaviors don't get inherited to children
// spawned via std::process, since they're needed for traditional UNIX
// filter behavior. This test checks that `yes | head` terminates
// (instead of running forever), and that it does not print an error
// message about a broken pipe.

// ignore-cloudabi no subprocesses support
// ignore-emscripten no threads support
// ignore-vxworks no 'sh'

use std::process;
use std::thread;

#[cfg(unix)]
fn main() {
    // Just in case `yes` doesn't check for EPIPE...
    thread::spawn(|| {
        thread::sleep_ms(5000);
        process::exit(1);
    });
    let output = process::Command::new("sh").arg("-c").arg("yes | head").output().unwrap();
    assert!(output.status.success());
    assert!(output.stderr.len() == 0);
}

#[cfg(not(unix))]
fn main() {
    // Not worried about signal masks on other platforms
}