unix - timeout a user input in perl -


i wanted prompt user input , after time , if no response , script must exit . had code 

eval {         local $sig{alrm} = sub { die "timeout getting input \n" };         alarm 5;         $answer = <stdin>;         alarm 0;         chomp $answer;     };     if ($@) {         #die $@ if $@ ne "timeout getting input\n";         $answer = 'a';     }

the alarm timeout working expected , wanted additional print statement after every second decrementing similar countdown (like 10 sec " 10 ...9 ..8 ..so on ) please how feature embed along timeout.

thanks

# disable output buffering $| = 1;  $answer; eval {         $count = 10;         local $sig{alrm} = sub {           # print counter , set alaram again           if (--$count) { print "$count\n"; alarm 1 }            # no more waiting           else { die "timeout getting input \n" }         };         # alarm every second         alarm 1;         $answer = <stdin>;         alarm 0;         chomp $answer; }; if ($@) {         #die $@ if $@ ne "timeout getting input\n";         $answer = 'a'; }

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