X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fstart.c;h=82122cc63a464b09642ba6faa7cc1e2a9c3c6042;hp=0f44f4cdac511a750d884546cc65d6a96001d52f;hb=f73fabfda365d22e7dd180fb1614e37c446fbd9e;hpb=d14d33bf091e72b23b1f90ea18a0a01bed098b76

diff --git a/src/bin/lttng/commands/start.c b/src/bin/lttng/commands/start.c
index 0f44f4cda..82122cc63 100644
--- a/src/bin/lttng/commands/start.c
+++ b/src/bin/lttng/commands/start.c
@@ -26,6 +26,8 @@
 
 #include "../command.h"
 
+#include <common/sessiond-comm/sessiond-comm.h>
+
 static char *opt_session_name;
 
 enum {
@@ -45,11 +47,12 @@ static struct poptOption long_options[] = {
  */
 static void usage(FILE *ofp)
 {
-	fprintf(ofp, "usage: lttng start [options] [NAME]\n");
+	fprintf(ofp, "usage: lttng start [NAME] [OPTIONS]\n");
 	fprintf(ofp, "\n");
 	fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n");
 	fprintf(ofp, "get it from the configuration directory (.lttng).\n");
 	fprintf(ofp, "\n");
+	fprintf(ofp, "Options:\n");
 	fprintf(ofp, "  -h, --help               Show this help\n");
 	fprintf(ofp, "      --list-options       Simple listing of options\n");
 	fprintf(ofp, "\n");
@@ -79,7 +82,14 @@ static int start_tracing(void)
 
 	ret = lttng_start_tracing(session_name);
 	if (ret < 0) {
-		/* Don't set ret so lttng can interpret the sessiond error. */
+		switch (-ret) {
+		case LTTNG_ERR_TRACE_ALREADY_STARTED:
+			WARN("Tracing already started for session %s", session_name);
+			break;
+		default:
+			ERR("%s", lttng_strerror(ret));
+			break;
+		}
 		goto free_name;
 	}