From: Robert Klemme <shortcutter@...>
Date: 2009-12-27T03:50:05+09:00
Subject: Re: How to know if a process is zombie?

On 26.12.2009 19:13, Iñaki Baz Castillo wrote:
> El Sábado, 26 de Diciembre de 2009, Robert Klemme escribió:
>> On 26.12.2009 17:53, Iñaki Baz Castillo wrote:
>>> Hi, after some forks I need to know if a process still is alive or not,
>>> but in case it's alive I also need to know if it's a zombie process (it
>>> died without Process.wait or Process.detach).
>>>
>>> Unfortunatelly I couln't find how to know it using Process module:
>>>   http://ruby-doc.org/core/classes/Process.html
>>>   http://ruby-doc.org/core/classes/Process/Status.html
>>>
>>> Is there any other way to determine if a given PID is zombie?
>> I believe you can use Process.kill(0, suspicious_pid) and if you get
>> "Errno::ESRCH: No such process" it does not exist any more or is a
>> zombie.
> 
> Unfortunatelly I've already checked it and doesn't work since a zombie process 
> does exist and does receive signals, so Process.kill(0, suspicious_pid) 
> returns true.
> 
> Anyhow I found a better approach so now I don't need need to know if a process 
> is zombie.
> 
> Thanks a lot.

Thank you for the heads up!

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/