X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fview.c;h=d339282e61e7513b3559643d646f5d847a20bf24;hb=9afbd878f072d5e0577811acf1d3340f65cf2e26;hp=430f8b62cfd208375691f3dda72ceb64f9ee881a;hpb=32a6298d8929c91842c9a5c09f1a3f4660c32eec;p=lttng-tools.git

diff --git a/src/bin/lttng/commands/view.c b/src/bin/lttng/commands/view.c
index 430f8b62c..d339282e6 100644
--- a/src/bin/lttng/commands/view.c
+++ b/src/bin/lttng/commands/view.c
@@ -278,7 +278,7 @@ error:
  */
 static int view_trace(void)
 {
-	int ret, count, i, found = 0;
+	int ret;
 	char *session_name, *trace_path;
 	struct lttng_session *sessions = NULL;
 
@@ -314,6 +314,8 @@ static int view_trace(void)
 	DBG("Viewing trace for session %s", session_name);
 
 	if (session_name) {
+		int i, count, found = 0;
+
 		/* Getting all sessions */
 		count = lttng_list_sessions(&sessions);
 		if (count < 0) {
@@ -339,6 +341,13 @@ static int view_trace(void)
 		}
 
 		trace_path = sessions[i].path;
+
+		if (sessions[i].enabled) {
+			WARN("Session %s is running. Please stop it before reading it.",
+					session_name);
+			ret = CMD_ERROR;
+			goto free_sessions;
+		}
 	} else {
 		trace_path = opt_trace_path;
 	}
@@ -352,9 +361,7 @@ static int view_trace(void)
 	}
 
 free_sessions:
-	if (sessions) {
-		free(sessions);
-	}
+	free(sessions);
 free_error:
 	if (opt_session_name == NULL) {
 		free(session_name);