First time trying to work with signals in Perl.
Reviewing example I try it, but not able to get it work for 'exit'.
I hope, I am correct, assuming, that the ending any code by

exit $return_code;

the $SIG{EXIT} should be de-referenced and processed?!
So, I have such code, that, I assume, should, but does not process signal handling:

#!/bin/perl
sub trp_h{
  print "\nIn 'trp_h()'. ".
       "\nReceived parameters \@_: ".(join ", ",@_).
       "\n\$! as a number: ".($!+0).", as a string: ".(" ".$!).
       "\n now 'sleep 5' before return.";
  sleep 5;
}
$SIG{EXIT}='trp_h';
print "\nSet handler: $SIG{EXIT}\n";
exit(5);
print "after first exit";

$SIG{EXIT}=\&trp_h;
print "\nSet handler to code: $SIG{EXIT}\n";
exit(3);
print "after second exit\n";

print "Restoring to default\n";
$SIG{EXIT}='DEFAULT';
exit(2);
exit 1;

[download]

Please, help me understand what is wrong, or,
if I mistaken on assumption that the 'exit()' is processed by the $SIG{EXIT},
how it could be handled to process activity, such as in UNIX 'trap "..." EXIT' command?

Thanks!

In reply to trap signal 'exit': why I am not able to have it work?? by alex5161

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