TIMTOWTDI

Alternate approach; closer to OP's original (and a surprise to me that it appears to work!)

#!/usr/bin/perl
use 5.016;
use warnings;
use strict;

my $prev_ctrlc = 0;

if( ($prev_ctrlc == 0) || ($prev_ctrlc == 1) ) {
   $SIG{'INT'} = \&control_c_observed;
   sleep 1;
   for (1..1e3) {
        say "\t nothing yet";
        sleep 2;
   }
}


sub control_c_observed {
   if ($prev_ctrlc == 0) {
     print "Second ctrl-c within 2 seconds required\n";
     $prev_ctrlc = 1;
    } else {
        $prev_ctrlc++;
    }
   if ($prev_ctrlc == 2 ) {
     say "OK, that's two of 'em!";
     exit;
   } 
}

[download]

Sample run:

C:\>C:\SQLite\1018190.pl
         nothing yet
         nothing yet
         nothing yet                 # single tap here
Second ctrl-c within 2 seconds required
         nothing yet
         nothing yet                 # double tap here
OK, that's two of 'em!

C:\>

[download]

The sleep's could annoy your users, as they might seem like the machine is (briefly) locking up.


If you didn't program your executable by toggling in binary, it wasn't really programming!

In reply to Re: Force 2 'ctrl-c's to kill program by ww
in thread Force 2 'ctrl-c's to kill program by albob

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