From: akr@...
Date: 2014-05-05T17:05:11+00:00
Subject: [ruby-core:62397] [ruby-trunk - Bug #5487] [Rejected] popen3 + timeout regression in ruby 1.9

Issue #5487 has been updated by Akira Tanaka.

Status changed from Assigned to Rejected

Please avoid Timeout.
Even if it doesn't hang as Ruby 1.8, it doesn't clean child processes.

Thread#join's argument (timeout) is usable to implement to timeout.

```
Open3.popen3("sleep 100 && echo hi", :pgroup=>true) {|i, o, e, w|
  th = Thread.new { e.read }
  if !w.join(1) # wait thread does not end within 1 second? 
    Process.kill(:TERM, -w.pid) # kill the process group
  end
  p th.value
}
```

----------------------------------------
Bug #5487: popen3 + timeout regression in ruby 1.9
https://bugs.ruby-lang.org/issues/5487#change-46554

* Author: William Morgan
* Status: Rejected
* Priority: Normal
* Assignee: Akira Tanaka
* Category: core
* Target version: 
* ruby -v: 1.9.2p290
* Backport: 
----------------------------------------
Wrapping Open3.popen3 in a Timeout::timeout block used to work in Ruby 1.8, but doesn't work in 1.9:

w@masanjin:~$ cat timeout.rb
require 'timeout'
require 'open3'

Timeout::timeout(1) { Open3.popen3("sleep 100 && echo hi") { |i, o, e| e.read } }
w@masanjin:~$ /usr/bin/ruby -v
ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]
w@masanjin:~$ /usr/bin/ruby timeout.rb 
/usr/lib/ruby/1.8/timeout.rb:60: execution expired (Timeout::Error)
	from /usr/lib/ruby/1.8/open3.rb:86:in `popen3'
	from timeout.rb:4
	from timeout.rb:4

w@masanjin:~$ ruby -v
ruby 1.9.2p290 (2011-07-09 revision 32553) [i686-linux]
w@masanjin:~$ ruby timeout.rb 
[sleeps forever]




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