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One way would be to break up the 15 minute sleep into smaller mini-sleeps. Presumably, waking up would allow your script to respond to the request to terminate. Any signal, or at least any non-ignored signal interrupts sleep. No need for polling. See also sleep:
Note: sleep() returns how long it actually slept, so your program can continue sleeping for the remaining time if some signal happened in between. The C API sleep() behaves similar, see sleep(3), but it returns the remaining sleep time, not the time actually slept. Alexander
-- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-) In reply to Re^2: Signal to a sleeping Perl program
by afoken
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