X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-app.c;h=1451963ad41f14cb1809e37594a3960238112819;hb=e9accd4fad532b481ff23af1ef2202c1b5a43c70;hp=ad7a817dc1be6f62db7f3da6411d984f92aa791e;hpb=816eefe7f0f83e9ad9dcb6c0f93c1d880a2088c3;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index ad7a817dc..1451963ad 100644
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -3064,7 +3064,7 @@ int ust_app_list_events(struct lttng_event **events)
 			/* Handle ustctl error. */
 			if (ret < 0) {
 				free(tmp_event);
-				if (ret != -LTTNG_UST_ERR_EXITING || ret != -EPIPE) {
+				if (ret != -LTTNG_UST_ERR_EXITING && ret != -EPIPE) {
 					ERR("UST app tp list get failed for app %d with ret %d",
 							app->sock, ret);
 				} else {
@@ -3164,7 +3164,7 @@ int ust_app_list_event_fields(struct lttng_event_field **fields)
 			/* Handle ustctl error. */
 			if (ret < 0) {
 				free(tmp_event);
-				if (ret != -LTTNG_UST_ERR_EXITING || ret != -EPIPE) {
+				if (ret != -LTTNG_UST_ERR_EXITING && ret != -EPIPE) {
 					ERR("UST app tp list field failed for app %d with ret %d",
 							app->sock, ret);
 				} else {
@@ -4992,6 +4992,7 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess,
 		struct snapshot_output *output, int wait, unsigned int nb_streams)
 {
 	int ret = 0;
+	unsigned int snapshot_done = 0;
 	struct lttng_ht_iter iter;
 	struct ust_app *app;
 	char pathname[PATH_MAX];
@@ -5066,6 +5067,7 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess,
 			if (ret < 0) {
 				goto error;
 			}
+			snapshot_done = 1;
 		}
 		break;
 	}
@@ -5133,6 +5135,7 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess,
 			if (ret < 0) {
 				goto error;
 			}
+			snapshot_done = 1;
 		}
 		break;
 	}
@@ -5141,6 +5144,15 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess,
 		break;
 	}
 
+	if (!snapshot_done) {
+		/*
+		 * If no snapshot was made and we are not in the error path, this means
+		 * that there are no buffers thus no (prior) application to snapshot
+		 * data from so we have simply NO data.
+		 */
+		ret = -ENODATA;
+	}
+
 error:
 	rcu_read_unlock();
 	return ret;