+ if (opt_snapshot) {
+ /* No output by default. */
+ const char *snapshot_url = NULL;
+
+ if (opt_url) {
+ snapshot_url = url;
+ } else if (!opt_data_url && !opt_ctrl_url) {
+ /* This is the session path that we need to use as output. */
+ snapshot_url = url;
+ }
+ ret = lttng_create_session_snapshot(session_name, snapshot_url);
+ } else if (opt_live_timer) {
+ const char *pathname;
+
+ if (opt_relayd_path) {
+ pathname = opt_relayd_path;
+ } else {
+ pathname = INSTALL_BIN_PATH "/lttng-relayd";
+ }
+ if (!opt_url && !opt_data_url && !check_relayd() &&
+ spawn_relayd(pathname, 0) < 0) {
+ goto error;
+ }
+ ret = lttng_create_session_live(session_name, url, opt_live_timer);
+ } else {
+ ret = _lttng_create_session_ext(session_name, url, datetime);
+ }
+ if (ret < 0) {
+ /* Don't set ret so lttng can interpret the sessiond error. */
+ switch (-ret) {
+ case LTTNG_ERR_EXIST_SESS:
+ WARN("Session %s already exists", session_name);
+ break;
+ default:
+ break;
+ }
+ goto error;
+ }
+
+ if (opt_ctrl_url && opt_data_url) {
+ if (opt_snapshot) {
+ ret = add_snapshot_output(session_name, opt_ctrl_url,
+ opt_data_url);
+ } else {
+ /* Setting up control URI (-C or/and -D opt) */
+ ret = set_consumer_url(session_name, opt_ctrl_url, opt_data_url);
+ }
+ if (ret < 0) {
+ /* Destroy created session because the URL are not valid. */
+ lttng_destroy_session(session_name);
+ goto error;
+ }
+ }
+
+ if (opt_shm_path) {
+ ret = snprintf(shm_path, sizeof(shm_path),
+ "%s/%s", opt_shm_path, session_name_date);
+ if (ret < 0) {
+ PERROR("snprintf shm_path");
+ goto error;
+ }
+
+ ret = lttng_set_session_shm_path(session_name, shm_path);
+ if (ret < 0) {
+ lttng_destroy_session(session_name);
+ goto error;
+ }
+ }
+
+ MSG("Session %s created.", session_name);
+ if (print_str_url && !opt_snapshot) {
+ MSG("Traces will be written in %s", print_str_url);
+
+ if (opt_live_timer) {
+ MSG("Live timer set to %u usec", opt_live_timer);
+ }
+ } else if (opt_snapshot) {
+ if (print_str_url) {
+ MSG("Default snapshot output set to: %s", print_str_url);
+ }
+ MSG("Snapshot mode set. Every channel enabled for that session will "
+ "be set to mmap output, and default to overwrite mode.");
+ }
+ if (opt_shm_path) {
+ MSG("Session %s set to shm_path: %s.", session_name,
+ shm_path);
+ }
+
+ /* Mi output */
+ if (lttng_opt_mi) {
+ ret = mi_created_session(session_name);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ }
+