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.
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.
13 use std::io::process::Command;
14 use std::iter::IteratorExt;
16 use libc::funcs::posix88::unistd;
19 // The output from "ps -A -o pid,ppid,args" should look like this:
26 // 7164 6076 ./spawn-failure
27 // 7165 7164 [spawn-failure] <defunct>
28 // 7166 7164 [spawn-failure] <defunct>
30 // 7197 7164 [spawn-failure] <defunct>
31 // 7198 7164 ps -A -o pid,ppid,command
36 let my_pid = unsafe { unistd::getpid() };
38 // http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html
39 let ps_cmd_output = Command::new("ps").args(&["-A", "-o", "pid,ppid,args"]).output().unwrap();
40 let ps_output = String::from_utf8_lossy(ps_cmd_output.output.as_slice());
42 for (line_no, line) in ps_output.split('\n').enumerate() {
43 if 0 < line_no && 0 < line.len() &&
44 my_pid == from_str(line.split(' ').filter(|w| 0 < w.len()).nth(1)
45 .expect("1st column should be PPID")
46 ).expect("PPID string into integer") &&
47 line.contains("defunct") {
48 panic!("Zombie child {}", line);
57 let too_long = format!("/NoSuchCommand{:0300}", 0u8);
59 let _failures = Vec::from_fn(100, |_i| {
60 let cmd = Command::new(too_long.as_slice());
61 let failed = cmd.spawn();
62 assert!(failed.is_err(), "Make sure the command fails to spawn(): {}", cmd);
67 // then _failures goes out of scope