- signal(SIGINT, sig_handler);
- signal(SIGTERM, sig_handler);
- signal(SIGALRM, sig_handler);
- signal(SIGCHLD, sig_handler);
+ /* set signal handler */
+ act.sa_handler = sig_handler;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = SA_RESTART;
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);