Hi
I would like to force a user to have to hit ctrl-c twice within 2 seconds in order to kill my program (safety net to prevent unintentional killing of the program). Ideally my code would look like the following: 
my $prev_ctrlc = 0;

$SIG{'INT'} = \&control_c_observed;

sub control_c_observed {
   if ($prev_ctrlc ==0) {
     print "Second ctrl-c within 2 seconds required\n";
     $prev_ctrlc = 1;
     sleep (2);
     $prev_ctrlc = 0;
   } else {
     print "This was the 2nd!Dying.\n";
     exit;
   }
}

[download]

However this obviously does not work (or I would not be hee :)). It looks like the first entry to "control_c_observed" must fully complete before the 2nd interupt request will be serviced.
Does anyone know of a way of achieving my desired behavior?
Thanks
Alan

In reply to Force 2 'ctrl-c's to kill program by albob

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