cli: add support for subscribing to objects

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/cli.c b/cli.c
index 080f953179a9ebf208ac7d6d5892abb43d1dee6a..624c089107405cd4f520fbc4f7321966e5eaa005 100644 (file)
--- a/cli.c
+++ b/cli.c
@@ -94,8 +94,7 @@ static void receive_call_result_data(struct ubus_request *req, int type, struct
        free(str);
 }
 
-static void receive_event(struct ubus_context *ctx, struct ubus_event_handler *ev,
-                         const char *type, struct blob_attr *msg)
+static void print_event(const char *type, struct blob_attr *msg)
 {
        char *str;
 
@@ -105,6 +104,20 @@ static void receive_event(struct ubus_context *ctx, struct ubus_event_handler *e
        free(str);
 }
 
+static int receive_request(struct ubus_context *ctx, struct ubus_object *obj,
+                           struct ubus_request_data *req,
+                           const char *method, struct blob_attr *msg)
+{
+       print_event(method, msg);
+       return 0;
+}
+
+static void receive_event(struct ubus_context *ctx, struct ubus_event_handler *ev,
+                         const char *type, struct blob_attr *msg)
+{
+       print_event(type, msg);
+}
+
 static int ubus_cli_list(struct ubus_context *ctx, int argc, char **argv)
 {
        const char *path = NULL;
@@ -142,7 +155,6 @@ static int ubus_cli_call(struct ubus_context *ctx, int argc, char **argv)
 
 struct cli_listen_data {
        struct uloop_timeout timeout;
-       struct ubus_event_handler ev;
        bool timed_out;
 };
 
@@ -153,13 +165,23 @@ static void listen_timeout(struct uloop_timeout *timeout)
        uloop_end();
 }
 
+static void do_listen(struct ubus_context *ctx, struct cli_listen_data *data)
+{
+       memset(data, 0, sizeof(*data));
+       data->timeout.cb = listen_timeout;
+       uloop_init();
+       ubus_add_uloop(ctx);
+       uloop_timeout_set(&data->timeout, timeout * 1000);
+       uloop_run();
+       uloop_done();
+}
+
 static int ubus_cli_listen(struct ubus_context *ctx, int argc, char **argv)
 {
-       struct cli_listen_data data = {
-               .timeout.cb = listen_timeout,
-               .ev.cb = receive_event,
-               .timed_out = false,
+       struct ubus_event_handler ev = {
+               .cb = receive_event,
        };
+       struct cli_listen_data data;
        const char *event;
        int ret = 0;
 
@@ -171,7 +193,7 @@ static int ubus_cli_listen(struct ubus_context *ctx, int argc, char **argv)
        }
 
        do {
-               ret = ubus_register_event_handler(ctx, &data.ev, event);
+               ret = ubus_register_event_handler(ctx, &ev, event);
                if (ret)
                        break;
 
@@ -190,15 +212,52 @@ static int ubus_cli_listen(struct ubus_context *ctx, int argc, char **argv)
                return -1;
        }
 
-       uloop_init();
-       ubus_add_uloop(ctx);
-       uloop_timeout_set(&data.timeout, timeout * 1000);
-       uloop_run();
-       uloop_done();
+       do_listen(ctx, &data);
+
+       return 0;
+}
+
+static int ubus_cli_subscribe(struct ubus_context *ctx, int argc, char **argv)
+{
+       struct ubus_subscriber sub = {
+               .cb = receive_request,
+       };
+       struct cli_listen_data data;
+       const char *event;
+       int ret = 0;
+
+       if (argc > 0) {
+               event = argv[0];
+       } else {
+               if (!simple_output)
+                       fprintf(stderr, "You need to specify an object to subscribe to\n");
+               return -1;
+       }
+
+       ret = ubus_register_subscriber(ctx, &sub);
+       for (; !ret && argc > 0; argc--, argv++) {
+               uint32_t id;
+
+               ret = ubus_lookup_id(ctx, argv[0], &id);
+               if (ret)
+                       break;
+
+               ret = ubus_subscribe(ctx, &sub, id);
+       }
+
+       if (ret) {
+               if (!simple_output)
+                       fprintf(stderr, "Error while registering for event '%s': %s\n",
+                               event, ubus_strerror(ret));
+               return -1;
+       }
+
+       do_listen(ctx, &data);
 
        return 0;
 }
 
+
 static int ubus_cli_send(struct ubus_context *ctx, int argc, char **argv)
 {
        if (argc < 1 || argc > 2)
@@ -504,6 +563,7 @@ static struct {
        { "list", ubus_cli_list },
        { "call", ubus_cli_call },
        { "listen", ubus_cli_listen },
+       { "subscribe", ubus_cli_subscribe },
        { "send", ubus_cli_send },
        { "wait_for", ubus_cli_wait_for },
        { "monitor", ubus_cli_monitor },