You have an example of capturing the pseudo-signal __DIE__

See perldoc -f die, to see the posible exit codes (one of them is 255)

-------

oscar@toreyes-i7:~/WIP/perl/gestion_DIE$ cat prueba.pl 
use diagnostics;
use strict;

sub mensaje() { print "OJO !!!! Este script se ha muerto por la ejecuc
+ión de die()\n"; }

# Instalar manejador en caso de ejecuarse un die()
$SIG{__DIE__} = \&mensaje;

my $refFake = 'pepe';
print $refFake->{'lolo'}; # Aqui se genera el error
print "Me moriré antes de mostrar esta linea\n";

oscar@toreyes-i7:~/WIP/perl/gestion_DIE$ perl prueba.pl 
OJO !!!! Este script se ha muerto por la ejecución de die()
Can't use string ("pepe") as a HASH ref while "strict refs" in use at 
+prueba.pl line 10.

oscar@toreyes-i7:~/WIP/perl/gestion_DIE$ echo $?
255
[download]

-------

Another example:

oscar@toreyes-i7:~/WIP/perl/gestion_DIE$ cat prueba2.pl 
use diagnostics;
use strict;
use Data::Dumper;

sub mensaje() { print "OJO !!!! Este script se ha muerto por la ejecuc
+ión de die()\n"; }


                   sub handler {   # 1st argument is signal name
                       # En caso de una "unhandled excepcion" como la 
+generada
                       # por die(), @_ parece que es el mensaje de err
+or en vez
                       # del identificador de una señal real.
                       my($sig) = @_;
                       print "Dumper(\$sig): ", Dumper($sig);
                       if ($sig)
                       {
                           print "sig:", $sig, "\n";
                           print "Caught a SIG$sig--shutting down\n";
                       }
                       else
                       {
                           print "sig no tiene un valor de señal\n";
                       }
                       ## exit(0);
                       }


# Instalar manejador en caso de ejecutarse un die()
# $SIG{__DIE__} = \&mensaje;
$SIG{__DIE__} = \&handler;

my $refFake = 'pepe';
print $refFake->{'lolo'}; # Aqui se genera el error
print "Me moriré antes de mostrar esta linea\n";

oscar@toreyes-i7:~/WIP/perl/gestion_DIE$ echo $?
255
[download]

------

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