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How can I kill subprocesses when the main script dies?

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Contributed by Anonymous Monk on May 11, 2000 at 00:13 UTC
Q&A  > programs and processes


using IIS(ew!!) and the occassionally it timeouts my perl script. however the processes started by my perl script keep going. i know how to get the PIDs for them, but is there a generic way to kill them before the outside program (IIS) kills my script? thanks

Answer: How can I kill subprocesses when the main script dies?
contributed by chromatic

Maybe an END block:

END { kill 'INT' => keys %children; }
If you keep the PIDs for your kids in %children, that'll do it. For example, the following script dies, but still prints the ending notice:
#!/usr/bin/perl -w use strict; BEGIN { print "This is at the start\n"; } die; print "This is in the middle.\n"; exit; print "This should never print.\n"; END { print "This is in the end.\n"; }
Answer: How can I kill subprocesses when the main script dies?
contributed by merlyn

An END block won't be executed unless a signal handler has been established, even if the signal handler simply dies.

The briefest way to do that is something like:

$SIG{INT} = sub { die };

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