ASSERT(sleep(2) == 0);
ASSERT(sleep(3) == 0);
sleeper(arg)	void *arg;{	sigset_t mask;	/* Ignore all signals in this thread */	sigfillset(&mask);	CHECKe(sigprocmask(SIG_SETMASK, &mask, NULL));	ASSERT(sleep(2) == 0);	SUCCEED;}