From: Francis Cianfrocca <garbagecat10@...>
Date: 2006-08-08T06:32:08+09:00
Subject: Re: How to recognize which child process has just ended?

unknown wrote:

> i don't think that's sufficient - one would still need a sig handler,
> something along the lines of:
> 

That's a surprise, what made you think so? Is that true on Windows, 
perhaps? On Unix no sig handler is needed.  SIGCHLD is ignored by 
default. The following works:

#----------------------

fork {exit 42}
fork {exit 2}

Process.wait2
Process.wait2

#----------------------

You can also call #wait and its variants with the flag Process::WNOHANG 
if you want to poll. Use a SIGCHLD handler if you need to know instantly 
when a child process finishes, but as always observe the standard 
guidelines for coding signal handlers.

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