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Re: Time-limited input on STDIN

by jamesduncan (Novice)
on Aug 08, 2003 at 22:33 UTC ( #282332=note: print w/ replies, xml ) Need Help??

in reply to Time-limited input on STDIN

I may be reading the problem wrong, but you could try using alarm and $SIG{ALRM} inside an eval block.

#!/usr/bin/perl use strict; use warnings; my $text; print "Prompt: "; alarm(10); eval { local $SIG{ALRM} = sub { die }; $text = <STDIN>; }; print "done accepting text\n";

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Re: Re: Time-limited input on STDIN
by bobn (Chaplain) on Aug 08, 2003 at 22:42 UTC

    You should use alarm(0) after the entry of data to turn off the alarm. Ottherwise, your program will be alarm'd even though you entered text in the allowed amount of time. See perldoc -f alarm for details.

    --Bob Niederman,
Re: Re: Time-limited input on STDIN
by ajdelore (Pilgrim) on Aug 11, 2003 at 17:58 UTC

    Thanks, this worked great. ++ to jamesduncan and bobn.

    One minor note: I did have to set local $/ = undef; within the eval block -- otherwise, it was finishing as soon as I pressed enter after a word.


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