Path: utzoo!attcan!uunet!cs.utexas.edu!texbell!vector!void!ozdaltx!toma
From: toma@ozdaltx.UUCP (Tom Armistead)
Newsgroups: comp.unix.wizards
Subject: Re: How can a parent find out if one of its children is still alive
Summary: kill(0)
Message-ID: <6334@ozdaltx.UUCP>
Date: 2 Jun 90 05:14:48 GMT
References: <30408@cup.portal.com>
Distribution: na
Organization: AIDS INFO EXCG/OZ BBS - Dallas, TX
Lines: 25

In article <30408@cup.portal.com>, DeadHead@cup.portal.com (Bruce M Ong) writes:
> I am sure there is a very easy way to do this, but I just havent
> figured this one out:
> 	
> 	How can a parent find out if one of its children is still alive
> or not without

.....

If you have the process id of the child you can use kill(2) to find out if
it is still there.

i.e.:   if( kill( child_pid, 0 ) == -1 )
            puts( "The child is dead" );

Signal 0 is called the NULL signal and is used to validate a process id, no 
signal is actually sent to the destination process.

Will this do it for you?

Tom
-- 
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{uunet,smu}!sulaco!ozdaltx!toma         (Tom Armistead @ Garland, Texas)
{uunet,smu}!sulaco!ozdaltx!swsrv1!toma