+static int ubus_cli_send(struct ubus_context *ctx, int argc, char **argv)
+{
+ if (argc < 1 || argc > 2)
+ return -2;
+
+ blob_buf_init(&b, 0);
+
+ if (argc == 2 && !blobmsg_add_json_from_string(&b, argv[1])) {
+ if (!simple_output)
+ fprintf(stderr, "Failed to parse message data\n");
+ return -1;
+ }
+
+ return ubus_send_event(ctx, argv[0], b.head);
+}
+
+struct cli_wait_data {
+ struct uloop_timeout timeout;
+ struct ubus_event_handler ev;
+ char **pending;
+ int n_pending;
+};
+
+static void wait_check_object(struct cli_wait_data *data, const char *path)
+{
+ int i;
+
+ for (i = 0; i < data->n_pending; i++) {
+ if (strcmp(path, data->pending[i]) != 0)
+ continue;
+
+ data->n_pending--;
+ if (i == data->n_pending)
+ break;
+
+ memmove(&data->pending[i], &data->pending[i + 1],
+ (data->n_pending - i) * sizeof(*data->pending));
+ i--;
+ }
+
+ if (!data->n_pending)
+ uloop_end();
+}
+
+static void wait_event_cb(struct ubus_context *ctx, struct ubus_event_handler *ev,
+ const char *type, struct blob_attr *msg)
+{
+ static const struct blobmsg_policy policy = {
+ "path", BLOBMSG_TYPE_STRING
+ };
+ struct cli_wait_data *data = container_of(ev, struct cli_wait_data, ev);
+ struct blob_attr *attr;
+ const char *path;
+
+ if (strcmp(type, "ubus.object.add") != 0)
+ return;
+
+ blobmsg_parse(&policy, 1, &attr, blob_data(msg), blob_len(msg));
+ if (!attr)
+ return;
+
+ path = blobmsg_data(attr);
+ wait_check_object(data, path);
+}
+
+static void wait_list_cb(struct ubus_context *ctx, struct ubus_object_data *obj, void *priv)
+{
+ struct cli_wait_data *data = priv;
+
+ wait_check_object(data, obj->path);
+}
+
+
+static void wait_timeout(struct uloop_timeout *timeout)
+{
+ uloop_end();
+}
+
+static int ubus_cli_wait_for(struct ubus_context *ctx, int argc, char **argv)
+{
+ struct cli_wait_data data = {
+ .timeout.cb = wait_timeout,
+ .ev.cb = wait_event_cb,
+ .pending = argv,
+ .n_pending = argc,
+ };
+ int ret;
+
+ if (argc < 1)
+ return -2;
+
+ uloop_init();
+ ubus_add_uloop(ctx);
+
+ ret = ubus_lookup(ctx, NULL, wait_list_cb, &data);
+ if (ret)
+ return ret;
+
+ if (!data.n_pending)
+ return ret;
+
+ ret = ubus_register_event_handler(ctx, &data.ev, "ubus.object.add");
+ if (ret)
+ return ret;
+
+ uloop_timeout_set(&data.timeout, timeout * 1000);
+ uloop_run();
+ uloop_done();
+
+ if (data.n_pending)
+ return UBUS_STATUS_TIMEOUT;
+
+ return ret;
+}
+
+
+static int usage(const char *prog)
+{
+ fprintf(stderr,
+ "Usage: %s [<options>] <command> [arguments...]\n"
+ "Options:\n"
+ " -s <socket>: Set the unix domain socket to connect to\n"
+ " -t <timeout>: Set the timeout (in seconds) for a command to complete\n"
+ " -S: Use simplified output (for scripts)\n"
+ " -v: More verbose output\n"
+ "\n"
+ "Commands:\n"
+ " - list [<path>] List objects\n"
+ " - call <path> <method> [<message>] Call an object method\n"
+ " - listen [<path>...] Listen for events\n"
+ " - send <type> [<message>] Send an event\n"
+ " - wait_for <object> [<object>...] Wait for multiple objects to appear on ubus\n"
+ "\n", prog);
+ return 1;
+}
+
+
+struct {
+ const char *name;
+ int (*cb)(struct ubus_context *ctx, int argc, char **argv);
+} commands[] = {
+ { "list", ubus_cli_list },
+ { "call", ubus_cli_call },
+ { "listen", ubus_cli_listen },
+ { "send", ubus_cli_send },
+ { "wait_for", ubus_cli_wait_for },
+};
+