81 lines
2.4 KiB
Rust
81 lines
2.4 KiB
Rust
// 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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// ignore-test
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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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use libc::funcs::posix88::unistd;
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// "ps -A -o pid,sid,command" with GNU ps should output something like this:
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// PID SID COMMAND
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// 1 1 /sbin/init
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// 2 0 [kthreadd]
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// 3 0 [ksoftirqd/0]
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// ...
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// 12562 9237 ./spawn-failure
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// 12563 9237 [spawn-failure] <defunct>
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// 12564 9237 [spawn-failure] <defunct>
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// ...
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// 12592 9237 [spawn-failure] <defunct>
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// 12593 9237 ps -A -o pid,sid,command
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// 12884 12884 /bin/zsh
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// 12922 12922 /bin/zsh
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// ...
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#[cfg(unix)]
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fn find_zombies() {
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// http://man.freebsd.org/ps(1)
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// http://man7.org/linux/man-pages/man1/ps.1.html
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#[cfg(not(target_os = "macos"))]
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const FIELDS: &'static str = "pid,sid,command";
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// https://developer.apple.com/library/mac/documentation/Darwin/
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// Reference/ManPages/man1/ps.1.html
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#[cfg(target_os = "macos")]
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const FIELDS: &'static str = "pid,sess,command";
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let my_sid = unsafe { unistd::getsid(0) };
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let ps_cmd_output = Command::new("ps").args(&["-A", "-o", FIELDS]).output().unwrap();
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let ps_output = String::from_utf8_lossy(ps_cmd_output.output.as_slice());
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let found = ps_output.split('\n').enumerate().any(|(line_no, line)|
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0 < line_no && 0 < line.len() &&
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my_sid == from_str(line.split(' ').filter(|w| 0 < w.len()).nth(1)
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.expect("1st column should be Session ID")
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).expect("Session ID string into integer") &&
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line.contains("defunct") && {
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println!("Zombie child {}", line);
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true
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}
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);
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assert!( ! found, "Found at least one zombie child");
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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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for _ in range(0u32, 100) {
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let invalid = Command::new(too_long.as_slice()).spawn();
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assert!(invalid.is_err());
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}
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find_zombies();
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}
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