+ fprintf(stderr, "\nCubemap starting.\n");
+
+ string config_filename = (argc == 1) ? "cubemap.config" : argv[1];
+ vector<ConfigLine> config = parse_config(config_filename);
+
+ int port = fetch_config_int(config, "port", 1, 65535);
+ int num_servers = fetch_config_int(config, "num_servers", 1, 20000); // Insanely high max limit.
+
+ servers = new ServerPool(num_servers);
+
+ int server_sock = -1, old_port = -1;
+ if (argc == 4 && strcmp(argv[2], "-state") == 0) {
+ fprintf(stderr, "Deserializing state from previous process... ");
+ int state_fd = atoi(argv[3]);
+ CubemapStateProto loaded_state = read_tempfile(state_fd);
+
+ // Deserialize the streams.
+ for (int i = 0; i < loaded_state.streams_size(); ++i) {
+ servers->add_stream_from_serialized(loaded_state.streams(i));
+ }
+
+ // Put back the existing clients. It doesn't matter which server we
+ // allocate them to, so just do round-robin.
+ for (int i = 0; i < loaded_state.clients_size(); ++i) {
+ servers->add_client_from_serialized(loaded_state.clients(i));
+ }
+
+ // Deserialize the server socket.
+ server_sock = loaded_state.server_sock();
+ old_port = loaded_state.port();
+
+ fprintf(stderr, "done.\n");
+ } else{
+ // TODO: This should come from the config file.
+ servers->add_stream(STREAM_ID);
+ }
+
+ // Open a new server socket if we do not already have one, or if we changed ports.
+ if (server_sock != -1 && port != old_port) {
+ fprintf(stderr, "NOTE: Port changed from %d to %d; opening new socket.\n", old_port, port);
+ close(server_sock);
+ server_sock = -1;
+ }
+ if (server_sock == -1) {
+ server_sock = create_server_socket(port);
+ }
+
+ servers->run();
+
+ pthread_t acceptor_thread;
+ pthread_create(&acceptor_thread, NULL, acceptor_thread_run, reinterpret_cast<void *>(server_sock));
+
+ // TODO: This should come from the config file.
+ Input input(STREAM_ID, STREAM_URL);
+ input.run();
+
+ signal(SIGHUP, hup);
+
+ while (!hupped) {
+ usleep(100000);
+ }
+
+ input.stop();
+
+ CubemapStateProto state;
+ state.set_server_sock(server_sock);
+ state.set_port(port);
+ for (int i = 0; i < num_servers; ++i) {
+ servers->get_server(i)->stop();
+
+ CubemapStateProto local_state = servers->get_server(i)->serialize();
+
+ // The stream state should be identical between the servers, so we only store it once.
+ if (i == 0) {
+ state.mutable_streams()->MergeFrom(local_state.streams());
+ }
+ for (int j = 0; j < local_state.clients_size(); ++j) {
+ state.add_clients()->MergeFrom(local_state.clients(j));
+ }
+ }
+ delete servers;
+
+ fprintf(stderr, "Serializing state and re-execing...\n");
+ int state_fd = make_tempfile(state);
+
+ char buf[16];
+ sprintf(buf, "%d", state_fd);
+
+ for ( ;; ) {
+ execlp(argv[0], argv[0], config_filename.c_str(), "-state", buf, NULL);
+ perror("execlp");
+ fprintf(stderr, "PANIC: re-exec of %s failed. Waiting 0.2 seconds and trying again...\n", argv[0]);
+ usleep(200000);
+ }