gio/tests/gdbus-example-watch-proxy.c

   1 #include <gio/gio.h>
   2
   3 static gchar *opt_name         = NULL;
   4 static gchar *opt_object_path  = NULL;
   5 static gchar *opt_interface    = NULL;
   6 static gboolean opt_system_bus = FALSE;
   7 static gboolean opt_auto_start = FALSE;
   8 static gboolean opt_no_properties = FALSE;
   9
  10 static GOptionEntry opt_entries[] =
  11 {
  12   { "name", 'n', 0, G_OPTION_ARG_STRING, &opt_name, "Name of the remote object to watch", NULL },
  13   { "object-path", 'o', 0, G_OPTION_ARG_STRING, &opt_object_path, "Object path of the remote object", NULL },
  14   { "interface", 'i', 0, G_OPTION_ARG_STRING, &opt_interface, "D-Bus interface of remote object", NULL },
  15   { "system-bus", 's', 0, G_OPTION_ARG_NONE, &opt_system_bus, "Use the system-bus instead of the session-bus", NULL },
  16   { "auto-start", 'a', 0, G_OPTION_ARG_NONE, &opt_auto_start, "Instruct the bus to launch an owner for the name", NULL},
  17   { "no-properties", 'p', 0, G_OPTION_ARG_NONE, &opt_no_properties, "Do not load properties", NULL},
  18   { NULL}
  19 };
  20
  21 static void
  22 print_properties (GDBusProxy *proxy)
  23 {
  24   gchar **property_names;
  25   guint n;
  26
  27   g_print ("    properties:\n");
  28
  29   property_names = g_dbus_proxy_get_cached_property_names (proxy);
  30   for (n = 0; property_names != NULL && property_names[n] != NULL; n++)
  31     {
  32       const gchar *key = property_names[n];
  33       GVariant *value;
  34       gchar *value_str;
  35       value = g_dbus_proxy_get_cached_property (proxy, key);
  36       value_str = g_variant_print (value, TRUE);
  37       g_print ("      %s -> %s\n", key, value_str);
  38       g_variant_unref (value);
  39       g_free (value_str);
  40     }
  41   g_strfreev (property_names);
  42 }
  43
  44 static void
  45 on_properties_changed (GDBusProxy          *proxy,
  46                        GVariant            *changed_properties,
  47                        const gchar* const  *invalidated_properties,
  48                        gpointer             user_data)
  49 {
  50   /* Note that we are guaranteed that changed_properties and
  51    * invalidated_properties are never NULL
  52    */
  53
  54   if (g_variant_n_children (changed_properties) > 0)
  55     {
  56       GVariantIter *iter;
  57       const gchar *key;
  58       GVariant *value;
  59
  60       g_print (" *** Properties Changed:\n");
  61       g_variant_get (changed_properties,
  62                      "a{sv}",
  63                      &iter);
  64       while (g_variant_iter_loop (iter, "{&sv}", &key, &value))
  65         {
  66           gchar *value_str;
  67           value_str = g_variant_print (value, TRUE);
  68           g_print ("      %s -> %s\n", key, value_str);
  69           g_free (value_str);
  70         }
  71       g_variant_iter_free (iter);
  72     }
  73
  74   if (g_strv_length ((GStrv) invalidated_properties) > 0)
  75     {
  76       guint n;
  77       g_print (" *** Properties Invalidated:\n");
  78       for (n = 0; invalidated_properties[n] != NULL; n++)
  79         {
  80           const gchar *key = invalidated_properties[n];
  81           g_print ("      %s\n", key);
  82         }
  83     }
  84 }
  85
  86 static void
  87 on_signal (GDBusProxy *proxy,
  88            gchar      *sender_name,
  89            gchar      *signal_name,
  90            GVariant   *parameters,
  91            gpointer    user_data)
  92 {
  93   gchar *parameters_str;
  94
  95   parameters_str = g_variant_print (parameters, TRUE);
  96   g_print (" *** Received Signal: %s: %s\n",
  97            signal_name,
  98            parameters_str);
  99   g_free (parameters_str);
 100 }
 101
 102 static void
 103 on_proxy_appeared (GDBusConnection *connection,
 104                    const gchar     *name,
 105                    const gchar     *name_owner,
 106                    GDBusProxy      *proxy,
 107                    gpointer         user_data)
 108 {
 109   g_print ("+++ Acquired proxy object for remote object owned by %s\n"
 110            "    bus:          %s\n"
 111            "    name:         %s\n"
 112            "    object path:  %s\n"
 113            "    interface:    %s\n",
 114            name_owner,
 115            opt_system_bus ? "System Bus" : "Session Bus",
 116            opt_name,
 117            opt_object_path,
 118            opt_interface);
 119
 120   print_properties (proxy);
 121
 122   g_signal_connect (proxy,
 123                     "g-properties-changed",
 124                     G_CALLBACK (on_properties_changed),
 125                     NULL);
 126
 127   g_signal_connect (proxy,
 128                     "g-signal",
 129                     G_CALLBACK (on_signal),
 130                     NULL);
 131 }
 132
 133 static void
 134 on_proxy_vanished (GDBusConnection *connection,
 135                    const gchar     *name,
 136                    gpointer         user_data)
 137 {
 138   g_print ("--- Cannot create proxy object for\n"
 139            "    bus:          %s\n"
 140            "    name:         %s\n"
 141            "    object path:  %s\n"
 142            "    interface:    %s\n",
 143            opt_system_bus ? "System Bus" : "Session Bus",
 144            opt_name,
 145            opt_object_path,
 146            opt_interface);
 147 }
 148
 149 int
 150 main (int argc, char *argv[])
 151 {
 152   guint watcher_id;
 153   GMainLoop *loop;
 154   GOptionContext *opt_context;
 155   GError *error;
 156   GBusNameWatcherFlags flags;
 157   GDBusProxyFlags proxy_flags;
 158
 159   g_type_init ();
 160
 161   opt_context = g_option_context_new ("g_bus_watch_proxy() example");
 162   g_option_context_set_summary (opt_context,
 163                                 "Example: to watch the object of gdbus-example-server, use:\n"
 164                                 "\n"
 165                                 "  ./gdbus-example-watch-proxy -n org.gtk.GDBus.TestServer  \\\n"
 166                                 "                              -o /org/gtk/GDBus/TestObject \\\n"
 167                                 "                              -i org.gtk.GDBus.TestInterface");
 168   g_option_context_add_main_entries (opt_context, opt_entries, NULL);
 169   error = NULL;
 170   if (!g_option_context_parse (opt_context, &argc, &argv, &error))
 171     {
 172       g_printerr ("Error parsing options: %s", error->message);
 173       goto out;
 174     }
 175   if (opt_name == NULL || opt_object_path == NULL || opt_interface == NULL)
 176     {
 177       g_printerr ("Incorrect usage, try --help.\n");
 178       goto out;
 179     }
 180
 181   flags = G_BUS_NAME_WATCHER_FLAGS_NONE;
 182   if (opt_auto_start)
 183     flags |= G_BUS_NAME_WATCHER_FLAGS_AUTO_START;
 184
 185   proxy_flags = G_DBUS_PROXY_FLAGS_NONE;
 186   if (opt_no_properties)
 187     proxy_flags |= G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES;
 188
 189   watcher_id = g_bus_watch_proxy (opt_system_bus ? G_BUS_TYPE_SYSTEM : G_BUS_TYPE_SESSION,
 190                                   opt_name,
 191                                   flags,
 192                                   opt_object_path,
 193                                   opt_interface,
 194                                   G_TYPE_DBUS_PROXY,
 195                                   proxy_flags,
 196                                   on_proxy_appeared,
 197                                   on_proxy_vanished,
 198                                   NULL,
 199                                   NULL);
 200
 201   loop = g_main_loop_new (NULL, FALSE);
 202   g_main_loop_run (loop);
 203
 204   g_bus_unwatch_proxy (watcher_id);
 205
 206  out:
 207   g_option_context_free (opt_context);
 208   g_free (opt_name);
 209   g_free (opt_object_path);
 210   g_free (opt_interface);
 211
 212   return 0;
 213 }