Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

C:\Daten\perl\forum>cat dollar_null.pl
#!/usr/bin/perl
use strict;
use warnings;
print "Hier laeuft das Skript '$0'\n";
sleep 2;
system('ps -f');
$0 = "chrrrrrchrrrrchrrrr";
print "Hier laeuft das Skript '$0'\n";
sleep 2;
system('ps -f');
$0 = "tschuess";
print "Das wars dann von '$0'\n";
system('ps -f');

C:\Daten\perl\forum>dollar_null.pl
Hier laeuft das Skript 'C:\Daten\perl\forum\dollar_null.pl'
     UID     PID    PPID TTY     STIME COMMAND
  usr207    1420       1  -1  15:19:29 /usr/bin/ps
Hier laeuft das Skript 'chrrrrrchrrrrchrrrr'
     UID     PID    PPID TTY     STIME COMMAND
  usr207    1404       1  -1  15:19:31 /usr/bin/ps
Das wars dann von 'tschuess'
     UID     PID    PPID TTY     STIME COMMAND
  usr207    1420       1  -1  15:19:31 /usr/bin/ps

C:\Daten\perl\forum>