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Re^2: Monitoring child processes

by rovf (Priest)
on Mar 13, 2012 at 15:49 UTC ( #959386=note: print w/replies, xml ) Need Help??


in reply to Re: Monitoring child processes
in thread Monitoring child processes

I had thought about waitpid with NO_WAIT (I have used a similar solution in a different application), but I was interested in get it to run by using kill 0. Actually, this seems to work so far, only that I didn't understand, why I had to 'IGNORE' SIGCHLD explicitly. Actually, I got the idea to use kill instead of waitpid from an example at perlipc:
Another interesting signal to send is signal number zero. This doesn't actually affect a child process, but instead checks whether it's alive or has changed its UID.
unless (kill 0 => $kid_pid) { warn "something wicked happened to $kid_pid"; }
This seemed to be an attractive and easy solution - that's why I wanted to try it out.

-- 
Ronald Fischer <ynnor@mm.st>

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