+static void receive_data(struct ubus_request *req, int type, struct blob_attr *msg)
+{
+ char *str;
+ if (!msg)
+ return;
+
+ str = blobmsg_format_json(msg, true);
+ fprintf(stderr, "%s\n", str);
+ free(str);
+}
+
+
+static void receive_event(struct ubus_context *ctx, struct ubus_event_handler *ev,
+ const char *type, struct blob_attr *msg)
+{
+ char *str;
+
+ if (msg)
+ str = blobmsg_format_json(msg, true);
+ else
+ str = "";
+
+ fprintf(stderr, "\"%s\":{ %s }\n", type, str);
+ free(str);
+}
+
+static int ubus_cli_listen(struct ubus_context *ctx, int argc, char **argv)
+{
+ static struct ubus_event_handler listener;
+ const char *event;
+ int ret = 0;
+
+ memset(&listener, 0, sizeof(listener));
+ listener.cb = receive_event;
+
+ if (!argc) {
+ event = "*";
+ ret = ubus_register_event_handler(ctx, &listener, NULL);
+ }
+
+ for (;argc;argv++, argc--) {
+ event = argv[0];
+ ret = ubus_register_event_handler(ctx, &listener, argv[0]);
+ if (ret)
+ break;
+ }
+
+ if (ret) {
+ fprintf(stderr, "Error while registering for event '%s': %s\n",
+ event, ubus_strerror(ret));
+ }
+
+ uloop_init();
+ ubus_add_uloop(ctx);
+ uloop_run();
+ uloop_done();
+
+ return 0;
+}
+
+static int usage(const char *prog)