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sonstiger Code
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# install a sighandler for sig CHLD
$SIG{CHLD} = \&chandler;
...
$pid = fork();

 if ($pid == 0)
 { 
   alarm 10;
   $SIG{'ALRM'}= sub {exit 1;};

   system ("ssh [SERVER] \"$command\"");
   exit;
 }
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sub chandler
{
# get child
my $pid=wait();
print "signal CHLD from $pid erhalten, Prozess wurde beendet.";
return 1;
}