66 static void err_sys(const char *, ...);
93 		err_sys("open");  in main()
156 		err_sys("send");  in chat()
188 		err_sys("getnameinfo");  in dump()
194 	    err_sys("write");  in dump()
197 		err_sys("close");  in dump()
200 	err_sys("recvfrom");  in dump()
204 	    err_sys("close");  in dump()
231 	    err_sys("setsockopt(SO_REUSEADDR)");  in open_multicast_socket()
238 	err_sys("connect");  in open_multicast_socket()
241 	err_sys("bind");  in open_multicast_socket()
270 	    err_sys("setsockopt(MCAST_JOIN_SOURCE_GROUP)");  in open_multicast_socket()
276 	    err_sys("setsockopt(MCAST_JOIN_GROUP)");  in open_multicast_socket()
293 	err_sys("socket");  in open_multicast_socket()
296 	err_sys("setsockopt(SO_REUSEADDR)");  in open_multicast_socket()
303 	err_sys("bind");  in open_multicast_socket()
311 	    err_sys("setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");  in open_multicast_socket()
316 	    err_sys("setsockopt(IP_ADD_MEMBERSHIP)");  in open_multicast_socket()
332 	err_sys("open");  in open_packet_file()
360 static void err_sys(const char *fmt, ...)  in err_sys()  function