sigget
(void)sigget(sp, NULL, signo, NULL);
(void)sigget(sp, NULL, signo, NULL);
sigget(l->l_sigpendset, &ksi, signo, NULL);
if ((signum = sigget(&p->p_sigpend, &ksi, 0, &l->l_sigwaitset)) == 0)
signum = sigget(&l->l_sigpend, &ksi, 0, &l->l_sigwaitset);
int sigget(sigpend_t *, ksiginfo_t *, int, const sigset_t *);