33 	struct sigaction sa;  in sethandler()  local
35 	memset(&sa, 0, sizeof(sa));  in sethandler()
36 	sa.sa_sigaction = handler;  in sethandler()
37 	sa.sa_flags = SA_SIGINFO | flags;  in sethandler()
38 	sigemptyset(&sa.sa_mask);  in sethandler()
39 	if (sigaction(sig, &sa, 0))  in sethandler()
45 	struct sigaction sa;  in clearhandler()  local
47 	memset(&sa, 0, sizeof(sa));  in clearhandler()
48 	sa.sa_handler = SIG_DFL;  in clearhandler()
49 	sigemptyset(&sa.sa_mask);  in clearhandler()
50 	if (sigaction(sig, &sa, 0))  in clearhandler()