my $pid = fork( );
		if ( defined $pid && $pid == 0 ) 
		{
			# child
			system( $_[0]->arg );
			if ($? == -1) 
			{
				return "failed to execute: $!\n";
			} 
			elsif ($? & 127) 
			{
				return "child died with signal %d, %s coredump\n", ($? & 127),  ($? & 128) ? 'with' : 'without';
			} 
			else
			{
				return "child exited with value " . $? >> 8;
			}
		}
		else
		{
			# parent
		}