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, NULL);
  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
  51   if (changed_properties != NULL)
  52     {
  53       GVariantIter *iter;
  54       GVariant *item;
  55
  56       g_print (" *** Properties Changed:\n");
  57       g_variant_get (changed_properties,
  58                      "a{sv}",
  59                      &iter);
  60       while ((item = g_variant_iter_next_value (iter)))
  61         {
  62           const gchar *key;
  63           GVariant *value;
  64           gchar *value_str;
  65           g_variant_get (item,
  66                          "{sv}",
  67                          &key,
  68                          &value);
  69           value_str = g_variant_print (value, TRUE);
  70           g_print ("      %s -> %s\n", key, value_str);
  71           g_free (value_str);
  72         }
  73     }
  74
  75   if (invalidated_properties != NULL)
  76     {
  77       guint n;
  78       g_print (" *** Properties Invalidated:\n");
  79       for (n = 0; invalidated_properties[n] != NULL; n++)
  80         {
  81           const gchar *key = invalidated_properties[n];
  82           g_print ("      %s\n", key);
  83         }
  84     }
  85 }
  86
  87 static void
  88 on_signal (GDBusProxy *proxy,
  89            gchar      *sender_name,
  90            gchar      *signal_name,
  91            GVariant   *parameters,
  92            gpointer    user_data)
  93 {
  94   gchar *parameters_str;
  95
  96   parameters_str = g_variant_print (parameters, TRUE);
  97   g_print (" *** Received Signal: %s: %s\n",
  98            signal_name,
  99            parameters_str);
 100   g_free (parameters_str);
 101 }
 102
 103 static void
 104 on_proxy_appeared (GDBusConnection *connection,
 105                    const gchar     *name,
 106                    const gchar     *name_owner,
 107                    GDBusProxy      *proxy,
 108                    gpointer         user_data)
 109 {
 110   g_print ("+++ Acquired proxy object for remote object owned by %s\n"
 111            "    bus:          %s\n"
 112            "    name:         %s\n"
 113            "    object path:  %s\n"
 114            "    interface:    %s\n",
 115            name_owner,
 116            opt_system_bus ? "System Bus" : "Session Bus",
 117            opt_name,
 118            opt_object_path,
 119            opt_interface);
 120
 121   print_properties (proxy);
 122
 123   g_signal_connect (proxy,
 124                     "g-properties-changed",
 125                     G_CALLBACK (on_properties_changed),
 126                     NULL);
 127
 128   g_signal_connect (proxy,
 129                     "g-signal",
 130                     G_CALLBACK (on_signal),
 131                     NULL);
 132 }
 133
 134 static void
 135 on_proxy_vanished (GDBusConnection *connection,
 136                    const gchar     *name,
 137                    gpointer         user_data)
 138 {
 139   g_print ("--- Cannot create proxy object for\n"
 140            "    bus:          %s\n"
 141            "    name:         %s\n"
 142            "    object path:  %s\n"
 143            "    interface:    %s\n",
 144            opt_system_bus ? "System Bus" : "Session Bus",
 145            opt_name,
 146            opt_object_path,
 147            opt_interface);
 148 }
 149
 150 int
 151 main (int argc, char *argv[])
 152 {
 153   guint watcher_id;
 154   GMainLoop *loop;
 155   GOptionContext *opt_context;
 156   GError *error;
 157   GBusNameWatcherFlags flags;
 158   GDBusProxyFlags proxy_flags;
 159
 160   g_type_init ();
 161
 162   opt_context = g_option_context_new ("g_bus_watch_proxy() example");
 163   g_option_context_set_summary (opt_context,
 164                                 "Example: to watch the object of gdbus-example-server, use:\n"
 165                                 "\n"
 166                                 "  ./gdbus-example-watch-proxy -n org.gtk.GDBus.TestServer  \\\n"
 167                                 "                              -o /org/gtk/GDBus/TestObject \\\n"
 168                                 "                              -i org.gtk.GDBus.TestInterface");
 169   g_option_context_add_main_entries (opt_context, opt_entries, NULL);
 170   error = NULL;
 171   if (!g_option_context_parse (opt_context, &argc, &argv, &error))
 172     {
 173       g_printerr ("Error parsing options: %s", error->message);
 174       goto out;
 175     }
 176   if (opt_name == NULL || opt_object_path == NULL || opt_interface == NULL)
 177     {
 178       g_printerr ("Incorrect usage, try --help.\n");
 179       goto out;
 180     }
 181
 182   flags = G_BUS_NAME_WATCHER_FLAGS_NONE;
 183   if (opt_auto_start)
 184     flags |= G_BUS_NAME_WATCHER_FLAGS_AUTO_START;
 185
 186   proxy_flags = G_DBUS_PROXY_FLAGS_NONE;
 187   if (opt_no_properties)
 188     proxy_flags |= G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES;
 189
 190   watcher_id = g_bus_watch_proxy (opt_system_bus ? G_BUS_TYPE_SYSTEM : G_BUS_TYPE_SESSION,
 191                                   opt_name,
 192                                   flags,
 193                                   opt_object_path,
 194                                   opt_interface,
 195                                   G_TYPE_DBUS_PROXY,
 196                                   proxy_flags,
 197                                   on_proxy_appeared,
 198                                   on_proxy_vanished,
 199                                   NULL,
 200                                   NULL);
 201
 202   loop = g_main_loop_new (NULL, FALSE);
 203   g_main_loop_run (loop);
 204
 205   g_bus_unwatch_proxy (watcher_id);
 206
 207  out:
 208   g_option_context_free (opt_context);
 209   g_free (opt_name);
 210   g_free (opt_object_path);
 211   g_free (opt_interface);
 212
 213   return 0;
 214 }