39 	struct sigaction sa;  in sethandler()  local
40 	memset(&sa, 0, sizeof(sa));  in sethandler()
41 	sa.sa_sigaction = handler;  in sethandler()
42 	sa.sa_flags = SA_SIGINFO | flags;  in sethandler()
43 	sigemptyset(&sa.sa_mask);  in sethandler()
44 	if (sigaction(sig, &sa, 0))  in sethandler()
50 	struct sigaction sa;  in clearhandler()  local
51 	memset(&sa, 0, sizeof(sa));  in clearhandler()
52 	sa.sa_handler = SIG_DFL;  in clearhandler()
53 	sigemptyset(&sa.sa_mask);  in clearhandler()
54 	if (sigaction(sig, &sa, 0))  in clearhandler()