Path: utzoo!attcan!uunet!virtech!cpcahil
From: cpcahil@virtech.uucp (Conor P. Cahill)
Newsgroups: comp.unix.questions
Subject: Re: Can process do an asynchronous wait?
Message-ID: <1990May31.133601.15616@virtech.uucp>
Date: 31 May 90 13:36:01 GMT
References: <30343@cup.portal.com>
Reply-To: cpcahil@virtech.UUCP (Conor P. Cahill)
Organization: Virtual Technologies Inc., Sterling VA
Lines: 17

In article <30343@cup.portal.com> tms@cup.portal.com (Alexis TMS Tatarsky) writes:
>If a process forks and execs several child processes, is there any
>way for the parent to detect when the child processes have exited 
>or died without having to wait(2) on them.  I wrote a program where
>the parent caught SIGCLD but I don't know which child it is which
>died. 

The signal handler for the SIGCLD should do a wait() which will provide
the process id and exit status of the child. The fact that you got 
a SIGCLD tells you that the wait will not block, so you don't have
to worry about getting stuck in there.


-- 
Conor P. Cahill            (703)430-9247        Virtual Technologies, Inc.,
uunet!virtech!cpcahil                           46030 Manekin Plaza, Suite 160
                                                Sterling, VA 22170