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There is about a 99% chance that syphilis's answer covers it. But for the record, if the program spawned by the GUI is not so well supported by Perl as to have a module for it, then Unix::PID might be useful, e.g.
Mac OSX conforms sufficiently to Unix for the purposes of this module, although the module documentation doesn't appear to give a list of supported environments. Update: in a multi-user environment parents and children would have to be user-id'd and matched up before doing the wait then kill. -M Free your mind In reply to Re: Running an external GUI program
by Moron
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