Add lttng-error.h containing every API err. code

[lttng-tools.git] / src / bin / lttng / commands / stop.c

diff --git a/src/bin/lttng/commands/stop.c b/src/bin/lttng/commands/stop.c
index f2ab453084f489cd38fe3cf2812a92278a05e296..7c89e37e577af5af2f52ca2600795f0c9f1bd7d7 100644 (file)
--- a/src/bin/lttng/commands/stop.c
+++ b/src/bin/lttng/commands/stop.c
@@ -1,19 +1,18 @@
 /*
  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; only version 2
- * of the License.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #define _GNU_SOURCE
@@ -27,6 +26,8 @@
 
 #include "../command.h"
 
+#include <common/sessiond-comm/sessiond-comm.h>
+
 static char *opt_session_name;
 
 enum {
@@ -46,11 +47,12 @@ static struct poptOption long_options[] = {
  */
 static void usage(FILE *ofp)
 {
-       fprintf(ofp, "usage: lttng stop [options] [NAME]\n");
+       fprintf(ofp, "usage: lttng stop [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");
@@ -76,7 +78,14 @@ static int stop_tracing(void)
 
        ret = lttng_stop_tracing(session_name);
        if (ret < 0) {
-               /* Don't set ret so lttng can interpret the sessiond error. */
+               switch (-ret) {
+               case LTTNG_ERR_TRACE_ALREADY_STOPPED:
+                       WARN("Tracing already stopped for session %s", session_name);
+                       break;
+               default:
+                       ERR("%s", lttng_strerror(ret));
+                       break;
+               }
                goto free_name;
        }