84 sigaction_handler (int sig)  in sigaction_handler()  argument
90   if (sig < 0 || NSIG <= sig || !action_array[sig].sa_handler)  in sigaction_handler()
93       if (sig == SIGABRT)  in sigaction_handler()
106   handler = action_array[sig].sa_handler;  in sigaction_handler()
107   if ((action_array[sig].sa_flags & SA_RESETHAND) == 0)  in sigaction_handler()
108     signal (sig, sigaction_handler);  in sigaction_handler()
110     action_array[sig].sa_handler = NULL;  in sigaction_handler()
113   mask = action_array[sig].sa_mask;  in sigaction_handler()
114   if ((action_array[sig].sa_flags & SA_NODEFER) == 0)  in sigaction_handler()
115     sigaddset (&mask, sig);  in sigaction_handler()
120   handler (sig);  in sigaction_handler()
131 sigaction (int sig, const struct sigaction *restrict act,  in sigaction()  argument
138   if (sig < 0 || NSIG <= sig || sig == SIGKILL || sig == SIGSTOP  in sigaction()
146   if (sig == SIGABRT_COMPAT)  in sigaction()
147     sig = SIGABRT;  in sigaction()
164       if (action_array[sig].sa_handler)  in sigaction()
165         *oact = action_array[sig];  in sigaction()
170           oact->sa_handler = signal (sig, SIG_DFL);  in sigaction()
173           signal (sig, oact->sa_handler);  in sigaction()
185           if (signal (sig, act->sa_handler) == SIG_ERR)  in sigaction()
187           action_array[sig].sa_handler = NULL;  in sigaction()
191           if (signal (sig, sigaction_handler) == SIG_ERR)  in sigaction()
193           action_array[sig] = *act;  in sigaction()