X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fview.c;h=dd3c9a3cc225b06d2ff055fdfb7acdfe0bc141ef;hp=430f8b62cfd208375691f3dda72ceb64f9ee881a;hb=94e60b1f03ae2c3c9450ffc3eca8e052e2c37fb4;hpb=1167f2bcb1a5d20421029b37a6d3c0d9cd2e5402

diff --git a/src/bin/lttng/commands/view.c b/src/bin/lttng/commands/view.c
index 430f8b62c..dd3c9a3cc 100644
--- a/src/bin/lttng/commands/view.c
+++ b/src/bin/lttng/commands/view.c
@@ -343,6 +343,13 @@ static int view_trace(void)
 		trace_path = opt_trace_path;
 	}
 
+	if (sessions[i].enabled) {
+		WARN("Session %s is running. Please stop it before reading it.",
+				session_name);
+		ret = CMD_ERROR;
+		goto free_sessions;
+	}
+
 	MSG("Trace directory: %s\n", trace_path);
 
 	ret = spawn_viewer(trace_path);