Fix enable channel usage and add enable event error msg

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

diff --git a/src/bin/lttng/commands/enable_channels.c b/src/bin/lttng/commands/enable_channels.c
index 19b6b260bd7065e0b6490d8e247036483ecb14c6..912e3b0413d64297a8a87638518b8a51d9322606 100644 (file)
--- a/src/bin/lttng/commands/enable_channels.c
+++ b/src/bin/lttng/commands/enable_channels.c
@@ -100,17 +100,17 @@ static void usage(FILE *ofp)
                DEFAULT_CHANNEL_OVERWRITE ? "" : " (default)");
        fprintf(ofp, "      --overwrite          Flight recorder mode%s\n",
                DEFAULT_CHANNEL_OVERWRITE ? " (default)" : "");
-       fprintf(ofp, "      --subbuf-size        Subbuffer size in bytes\n");
+       fprintf(ofp, "      --subbuf-size SIZE   Subbuffer size in bytes\n");
        fprintf(ofp, "                               (default: %u, kernel default: %u)\n",
                DEFAULT_CHANNEL_SUBBUF_SIZE,
                DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE);
-       fprintf(ofp, "      --num-subbuf         Number of subbufers\n");
+       fprintf(ofp, "      --num-subbuf NUM     Number of subbufers\n");
        fprintf(ofp, "                               (default: %u, kernel default: %u)\n",
                DEFAULT_CHANNEL_SUBBUF_NUM,
                DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM);
-       fprintf(ofp, "      --switch-timer       Switch timer interval in usec (default: %u)\n",
+       fprintf(ofp, "      --switch-timer USEC  Switch timer interval in usec (default: %u)\n",
                DEFAULT_CHANNEL_SWITCH_TIMER);
-       fprintf(ofp, "      --read-timer         Read timer interval in usec (default: %u)\n",
+       fprintf(ofp, "      --read-timer USEC    Read timer interval in usec (default: %u)\n",
                DEFAULT_CHANNEL_READ_TIMER);
        fprintf(ofp, "\n");
 }
@@ -151,7 +151,7 @@ static void set_default_attr(struct lttng_domain *dom)
  */
 static int enable_channel(char *session_name)
 {
-       int ret = CMD_SUCCESS;
+       int ret = CMD_SUCCESS, warn = 0;
        char *channel_name;
        struct lttng_domain dom;
 
@@ -185,7 +185,9 @@ static int enable_channel(char *session_name)
 
                ret = lttng_enable_channel(handle, &chan);
                if (ret < 0) {
-                       goto error;
+                       ERR("Channel %s: %s (session %s)", channel_name,
+                                       lttng_strerror(ret), session_name);
+                       warn = 1;
                } else {
                        MSG("%s channel %s enabled for session %s",
                                        opt_kernel ? "Kernel" : "UST", channel_name,
@@ -196,7 +198,13 @@ static int enable_channel(char *session_name)
                channel_name = strtok(NULL, ",");
        }
 
+       ret = CMD_SUCCESS;
+
 error:
+       if (warn) {
+               ret = CMD_WARNING;
+       }
+
        lttng_destroy_handle(handle);
 
        return ret;