9  *      int sigaddset(sigset_t *mask, int sig);
10  *      int sigdelset(sigset_t *mask, int sig);
11  *      int sigemptyset(sigset_t *mask);
12  *      int sigfillset(sigset_t *mask);
13  *      int sigismember(sigset_t *mask, int sig);
16  *      int sigsuspend(sigset_t *mask);
68  *      sigaddset() adds "sig" to the sigset_t pointed to by "mask".
71  *      by "mask".
73  *      sigemptyset() makes the sigset_t pointed to by "mask" empty.
75  *      sigfillset() makes the sigset_t pointed to by "mask"
78  *      sigismember() returns true if "sig" is found in "*mask".
85  *      signal mask for the calling process.  Either "set" or
91  *      sigsuspend() sets the signal mask to "*mask" and waits
93  *      mask is restored.
225 sigaddset(sigset_t *mask, int sig)  in sigaddset()  argument
227 	*mask |= sigmask(sig);  in sigaddset()
233 sigdelset(sigset_t *mask, int sig)  in sigdelset()  argument
235 	*mask &= ~(sigmask(sig));  in sigdelset()
241 sigemptyset(sigset_t *mask)  in sigemptyset()  argument
243 	*mask = 0;  in sigemptyset()
249 sigfillset(sigset_t *mask)  in sigfillset()  argument
251 	*mask = ~0;  in sigfillset()
257 sigismember(const sigset_t *mask, int sig)  in sigismember()  argument
259 	return ((*mask) & sigmask(sig));  in sigismember()
330 sigsuspend(sigset_t *mask)  in sigsuspend()  argument
333 	sigpause(*mask);  in sigsuspend()
340 		if (*mask & sigmask(i)) {  in sigsuspend()
350          * make sure that signals in mask will not  in sigsuspend()
354 		if (*mask & sigmask(i)) {  in sigsuspend()