From: Bertram Scharpf <lists@...>
Date: 2009-12-27T04:19:03+09:00
Subject: Re: How to know if a process is zombie?

Hi,

Am Sonntag, 27. Dez 2009, 01:53:42 +0900 schrieb Iņaki Baz Castillo:
> 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:
> 
> Is there any other way to determine if a given PID is zombie?

  trap "SIGCHLD" do |sig| puts "A child became a zombie." end

This tells you when it happened. As far as I know there is no way
to find out which process it was. I recommend waiting
(Process.waitpid) for every pid you forked.

Bertram


-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
*
Discover String#notempty? at <http://raa.ruby-lang.org/project/step>.