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From: cpcahil@virtech.UUCP (Conor P. Cahill)
Newsgroups: comp.unix.questions,comp.unix.wizards
Subject: Re: defunct processes even after signal(...wait())
Keywords: signal , wait and defunct processes ...
Message-ID: <1183@virtech.UUCP>
Date: 20 Sep 89 02:02:35 GMT
References: <230@cerc.wvu.wvnet.edu.edu>
Distribution: usa
Organization: Virtual Technologies Inc
Lines: 23

In article <230@cerc.wvu.wvnet.edu.edu>, kannan@cerc.wvu.wvnet.edu (R. Kannan) writes:
> 	We are faced with a strange problem. Even though we have the 
>         int ChildInt ()  {   wait((union wait *)0); }
> 
>     		signal(SIGCHLD, ChildInt);
>   
>       when we really try to fork at a very rapid rate, we end up with
>       some defunct (ZOMBIE ) processes.

> 	Is a SUN 4 environment. COuld some one explain to us what 
>         could be wrong? and possible solutions.

It *sounds like* you are loosing some of the sigchlds.  Since you are 
running under the sun os I would recommend using the BSD signal handling
mechanisms which should handle the problem.



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