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Message-ID: <3FE204A1.76EC91B@dessent.net>
Date: Thu, 18 Dec 2003 11:48:49 -0800
From: Brian Dessent <brian AT dessent DOT net>
Organization: My own little world...
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To: "'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject: Re: kill(pid, 0) issue
References: <E087F7025D7E494B8015119695CEDB4C0209B0C0 AT zpl02exm01 DOT mpsc DOT mot DOT com>
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Nowakowski Maciej-AMN011 wrote:

>       //int dummy;
>       //wait (&dummy);
>       getc(stdin);
>     }
>   printf ("%d = kill (%d, 0)\n", kill (pid, 0), pid);

When the child process terminates its in a zombie state until its parent
reaps it by calling wait.  Thus a call to kill will return success
because the child  process still exists.  If you were to do a ps listing
in this state you would see the child designated as a zombie.  This is
basic Unix process behavior.  See for example
<http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC13>

Brian

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