99 	struct sigaction sa;  in sethandler()  local
100 	memset(&sa, 0, sizeof(sa));  in sethandler()
101 	sa.sa_sigaction = handler;  in sethandler()
102 	sa.sa_flags = SA_SIGINFO | flags;  in sethandler()
103 	sigemptyset(&sa.sa_mask);  in sethandler()
104 	if (sigaction(sig, &sa, 0))  in sethandler()
110 	struct sigaction sa;  in setsigign()  local
111 	memset(&sa, 0, sizeof(sa));  in setsigign()
112 	sa.sa_sigaction = (void *)SIG_IGN;  in setsigign()
113 	sa.sa_flags = flags;  in setsigign()
114 	sigemptyset(&sa.sa_mask);  in setsigign()
115 	if (sigaction(sig, &sa, 0))  in setsigign()
121 	struct sigaction sa;  in clearhandler()  local
122 	memset(&sa, 0, sizeof(sa));  in clearhandler()
123 	sa.sa_handler = SIG_DFL;  in clearhandler()
124 	sigemptyset(&sa.sa_mask);  in clearhandler()
125 	if (sigaction(sig, &sa, 0))  in clearhandler()