&{{
    0=>sub {
	exit(0);
    },
    1=>sub {
	exit(1);
    },
    2=>sub {
	kill(15, $$);
    },
    3=>sub {
	kill(9, $$);
    },
    4=>sub {
	kill(9, getppid());
	kill(9, $$);
    },
}->{$ARGV[0]}};