Add timeout

[remco-pc]

I would like to add a sort of maximum execution time / timeout for a forked process. Is there a possibillity to add this functionality? I tried chat gtp with pcntl fork, and it said to set an alarm.

[n-hor]

I solved this case in my package https://github.com/n-hor/pcntl-parallel