+ set<string> expecting_stream_ids = deserialized_stream_ids;
+ for (unsigned i = 0; i < config.streams.size(); ++i) {
+ const StreamConfig &stream_config = config.streams[i];
+ if (deserialized_stream_ids.count(stream_config.stream_id) == 0) {
+ servers->add_stream(stream_config.stream_id);
+ }
+ expecting_stream_ids.erase(stream_config.stream_id);
+
+ if (stream_config.mark_pool != -1) {
+ servers->set_mark_pool(stream_config.stream_id,
+ mark_pools[stream_config.mark_pool]);
+ }
+ }
+
+ // Warn about any servers we've lost.
+ // TODO: Make an option (delete=yes?) to actually shut down streams.
+ for (set<string>::const_iterator stream_it = expecting_stream_ids.begin();
+ stream_it != expecting_stream_ids.end();
+ ++stream_it) {
+ string stream_id = *stream_it;
+ fprintf(stderr, "WARNING: stream '%s' disappeared from the configuration file.\n",
+ stream_id.c_str());
+ fprintf(stderr, " It will not be deleted, but clients will not get any new inputs.\n");
+ if (deserialized_inputs->count(stream_id) != 0) {
+ delete (*deserialized_inputs)[stream_id];
+ deserialized_inputs->erase(stream_id);
+ }
+ }
+}
+
+bool dry_run_config(const std::string &argv0, const std::string &config_filename)
+{
+ char *argv0_copy = strdup(argv0.c_str());
+ char *config_filename_copy = strdup(config_filename.c_str());
+
+ pid_t pid = fork();
+ switch (pid) {
+ case -1:
+ perror("fork()");
+ free(argv0_copy);
+ free(config_filename_copy);
+ return false;
+ case 0:
+ // Child.
+ execlp(argv0_copy, argv0_copy, "--test-config", config_filename_copy, NULL);
+ perror(argv0_copy);
+ _exit(1);
+ default:
+ // Parent.
+ break;
+ }
+
+ free(argv0_copy);
+ free(config_filename_copy);
+
+ int status;
+ pid_t err;
+ do {
+ err = waitpid(pid, &status, 0);
+ } while (err == -1 && errno == EINTR);
+
+ if (err == -1) {
+ perror("waitpid()");
+ return false;
+ }
+
+ return (WIFEXITED(status) && WEXITSTATUS(status) == 0);
+}
+
+int main(int argc, char **argv)
+{
+ // Parse options.
+ int state_fd = -1;
+ bool test_config = false;
+ for ( ;; ) {
+ static const option long_options[] = {
+ { "state", required_argument, 0, 's' },
+ { "test-config", no_argument, 0, 't' },
+ };
+ int option_index = 0;
+ int c = getopt_long (argc, argv, "s:t", long_options, &option_index);
+
+ if (c == -1) {
+ break;
+ }
+ switch (c) {
+ case 's':
+ state_fd = atoi(optarg);
+ break;
+ case 't':
+ test_config = true;
+ break;
+ default:
+ assert(false);
+ }
+ }