2014-12-04 12:05:57 -06:00
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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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extern crate libc;
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use std::io::process::Command;
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use std::iter::IteratorExt;
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2014-12-22 11:04:23 -06:00
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use std::str::from_str;
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2014-12-04 12:05:57 -06:00
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use libc::funcs::posix88::unistd;
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2014-12-06 17:05:13 -06:00
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// The output from "ps -A -o pid,ppid,args" should look like this:
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// PID PPID COMMAND
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// 1 0 /sbin/init
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2014-12-04 12:05:57 -06:00
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// 2 0 [kthreadd]
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// ...
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2014-12-06 17:05:13 -06:00
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// 6076 9064 /bin/zsh
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// ...
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// 7164 6076 ./spawn-failure
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// 7165 7164 [spawn-failure] <defunct>
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// 7166 7164 [spawn-failure] <defunct>
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// ...
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2014-12-06 17:05:13 -06:00
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// 7197 7164 [spawn-failure] <defunct>
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// 7198 7164 ps -A -o pid,ppid,command
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// ...
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#[cfg(unix)]
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fn find_zombies() {
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2014-12-06 17:05:13 -06:00
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let my_pid = unsafe { unistd::getpid() };
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2014-12-04 12:05:57 -06:00
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2014-12-06 17:05:13 -06:00
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// http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html
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let ps_cmd_output = Command::new("ps").args(&["-A", "-o", "pid,ppid,args"]).output().unwrap();
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let ps_output = String::from_utf8_lossy(ps_cmd_output.output.as_slice());
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2014-12-06 17:05:13 -06:00
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for (line_no, line) in ps_output.split('\n').enumerate() {
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if 0 < line_no && 0 < line.len() &&
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my_pid == from_str(line.split(' ').filter(|w| 0 < w.len()).nth(1)
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.expect("1st column should be PPID")
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).expect("PPID string into integer") &&
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line.contains("defunct") {
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panic!("Zombie child {}", line);
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}
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2014-12-06 17:05:13 -06:00
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}
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2014-12-04 12:05:57 -06:00
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}
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#[cfg(windows)]
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fn find_zombies() { }
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fn main() {
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let too_long = format!("/NoSuchCommand{:0300}", 0u8);
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2014-12-06 17:05:13 -06:00
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let _failures = Vec::from_fn(100, |_i| {
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let cmd = Command::new(too_long.as_slice());
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let failed = cmd.spawn();
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assert!(failed.is_err(), "Make sure the command fails to spawn(): {}", cmd);
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failed
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});
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2014-12-04 12:05:57 -06:00
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find_zombies();
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2014-12-06 17:05:13 -06:00
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// then _failures goes out of scope
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}
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