trigger: implement listing of registered trigger
[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl.c
index 1c51eedc7814ff4879a844303b280200ae2e6fe2..91d6109e5383b77f8013d67aad18b374d4e131ba 100644 (file)
@@ -3173,6 +3173,52 @@ end:
        return ret;
 }
 
+/*
+ * Ask the session daemon for all registered triggers for the current user.
+ *
+ * Allocates and return an lttng_triggers set.
+ * On error, returns a suitable lttng_error_code.
+ */
+enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers)
+{
+       int ret;
+       enum lttng_error_code ret_code = LTTNG_OK;
+       struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS };
+       struct lttng_triggers *local_triggers = NULL;
+       struct lttng_payload reply;
+       struct lttng_payload_view lsm_view =
+                       lttng_payload_view_init_from_buffer(
+                               (const char *) &lsm, 0, sizeof(lsm));
+
+       lttng_payload_init(&reply);
+
+       ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply);
+       if (ret < 0) {
+               ret_code = (enum lttng_error_code) -ret;
+               goto end;
+       }
+
+       {
+               struct lttng_payload_view reply_view =
+                               lttng_payload_view_from_payload(
+                                               &reply, 0, reply.buffer.size);
+
+               ret = lttng_triggers_create_from_payload(
+                               &reply_view, &local_triggers);
+               if (ret < 0) {
+                       ret_code = LTTNG_ERR_FATAL;
+                       goto end;
+               }
+       }
+
+       *triggers = local_triggers;
+       local_triggers = NULL;
+end:
+       lttng_payload_reset(&reply);
+       lttng_triggers_destroy(local_triggers);
+       return ret_code;
+}
+
 /*
  * lib constructor.
  */
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