if (memcmp(map2, MAGIC, sizeof(MAGIC)) == 0);
if (memcmp(map2, MAGIC, sizeof(MAGIC)) == 0) {
main(){	char *map, *map2;	int status;	map = alloca(sizeof(MAGIC));	memset(map, 0, sizeof(MAGIC));	map2 = alloca(sizeof(MAGIC));	memset(map2, 0, sizeof(MAGIC));	switch(rfork(RFFDG|RFPROC|RFMEM)) {	case -1:		err(1, "fork");	case 0:		memcpy(map, MAGIC, sizeof(MAGIC));		sleep(1);		if (memcmp(map2, MAGIC, sizeof(MAGIC)) == 0);			write(2, "child stack polluted\n", 21);		_exit(0);	}	if (wait(&status) < 0)		err(1, "wait");	if (!WIFEXITED(status))		err(1, "child error");	if (memcmp(map, MAGIC, sizeof(MAGIC)) == 0)		return 1;	return WEXITSTATUS(status) != 0;}