src/test/run-pass/process-detach.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // ignore-test
  12
  13 // FIXME: this test is being ignored until signals are implemented
  14
  15 // This test ensures that the 'detach' field on processes does the right thing.
  16 // By detaching the child process, they should be put into a separate process
  17 // group. We test this by spawning a detached process, then killing our own
  18 // group with a signal.
  19 //
  20 // Note that the first thing we do is put ourselves in our own process group so
  21 // we don't interfere with other running tests.
  22
  23 extern crate libc;
  24
  25 use std::io::process;
  26 use std::io::process::Command;
  27 use std::io::signal::{Listener, Interrupt};
  28
  29 fn main() {
  30     unsafe { libc::setsid(); }
  31
  32     // we shouldn't die because of an interrupt
  33     let mut l = Listener::new();
  34     l.register(Interrupt).unwrap();
  35
  36     // spawn the child
  37     let mut p = Command::new("/bin/sh").arg("-c").arg("read a").detached().spawn().unwrap();
  38
  39     // send an interrupt to everyone in our process group
  40     unsafe { libc::funcs::posix88::signal::kill(0, libc::SIGINT); }
  41
  42     // Wait for the child process to die (terminate it's stdin and the read
  43     // should fail).
  44     drop(p.stdin.take());
  45     match p.wait().unwrap() {
  46         process::ExitStatus(..) => {}
  47         process::ExitSignal(..) => panic!()
  48     }
  49 }