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, NULL);
  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                        gpointer    user_data)
  48 {
  49   GVariantIter *iter;
  50   GVariant *item;
  51
  52   g_print (" *** Properties Changed:\n");
  53
  54   g_variant_get (changed_properties,
  55                  "a{sv}",
  56                  &iter);
  57   while ((item = g_variant_iter_next_value (iter)))
  58     {
  59       const gchar *key;
  60       GVariant *value;
  61       gchar *value_str;
  62
  63       g_variant_get (item,
  64                      "{sv}",
  65                      &key,
  66                      &value);
  67
  68       value_str = g_variant_print (value, TRUE);
  69       g_print ("      %s -> %s\n", key, value_str);
  70       g_free (value_str);
  71     }
  72 }
  73
  74 static void
  75 on_signal (GDBusProxy *proxy,
  76            gchar      *sender_name,
  77            gchar      *signal_name,
  78            GVariant   *parameters,
  79            gpointer    user_data)
  80 {
  81   gchar *parameters_str;
  82
  83   parameters_str = g_variant_print (parameters, TRUE);
  84   g_print (" *** Received Signal: %s: %s\n",
  85            signal_name,
  86            parameters_str);
  87   g_free (parameters_str);
  88 }
  89
  90 static void
  91 on_proxy_appeared (GDBusConnection *connection,
  92                    const gchar     *name,
  93                    const gchar     *name_owner,
  94                    GDBusProxy      *proxy,
  95                    gpointer         user_data)
  96 {
  97   g_print ("+++ Acquired proxy object for remote object owned by %s\n"
  98            "    bus:          %s\n"
  99            "    name:         %s\n"
 100            "    object path:  %s\n"
 101            "    interface:    %s\n",
 102            name_owner,
 103            opt_system_bus ? "System Bus" : "Session Bus",
 104            opt_name,
 105            opt_object_path,
 106            opt_interface);
 107
 108   print_properties (proxy);
 109
 110   g_signal_connect (proxy,
 111                     "g-properties-changed",
 112                     G_CALLBACK (on_properties_changed),
 113                     NULL);
 114
 115   g_signal_connect (proxy,
 116                     "g-signal",
 117                     G_CALLBACK (on_signal),
 118                     NULL);
 119 }
 120
 121 static void
 122 on_proxy_vanished (GDBusConnection *connection,
 123                    const gchar     *name,
 124                    gpointer         user_data)
 125 {
 126   g_print ("--- Cannot create proxy object for\n"
 127            "    bus:          %s\n"
 128            "    name:         %s\n"
 129            "    object path:  %s\n"
 130            "    interface:    %s\n",
 131            opt_system_bus ? "System Bus" : "Session Bus",
 132            opt_name,
 133            opt_object_path,
 134            opt_interface);
 135 }
 136
 137 int
 138 main (int argc, char *argv[])
 139 {
 140   guint watcher_id;
 141   GMainLoop *loop;
 142   GOptionContext *opt_context;
 143   GError *error;
 144   GBusNameWatcherFlags flags;
 145   GDBusProxyFlags proxy_flags;
 146
 147   g_type_init ();
 148
 149   opt_context = g_option_context_new ("g_bus_watch_proxy() example");
 150   g_option_context_set_summary (opt_context,
 151                                 "Example: to watch the object of gdbus-example-server, use:\n"
 152                                 "\n"
 153                                 "  ./gdbus-example-watch-proxy -n org.gtk.GDBus.TestServer  \\\n"
 154                                 "                              -o /org/gtk/GDBus/TestObject \\\n"
 155                                 "                              -i org.gtk.GDBus.TestInterface");
 156   g_option_context_add_main_entries (opt_context, opt_entries, NULL);
 157   error = NULL;
 158   if (!g_option_context_parse (opt_context, &argc, &argv, &error))
 159     {
 160       g_printerr ("Error parsing options: %s", error->message);
 161       goto out;
 162     }
 163   if (opt_name == NULL || opt_object_path == NULL || opt_interface == NULL)
 164     {
 165       g_printerr ("Incorrect usage, try --help.\n");
 166       goto out;
 167     }
 168
 169   flags = G_BUS_NAME_WATCHER_FLAGS_NONE;
 170   if (opt_auto_start)
 171     flags |= G_BUS_NAME_WATCHER_FLAGS_AUTO_START;
 172
 173   proxy_flags = G_DBUS_PROXY_FLAGS_NONE;
 174   if (opt_no_properties)
 175     proxy_flags |= G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES;
 176
 177   watcher_id = g_bus_watch_proxy (opt_system_bus ? G_BUS_TYPE_SYSTEM : G_BUS_TYPE_SESSION,
 178                                   opt_name,
 179                                   flags,
 180                                   opt_object_path,
 181                                   opt_interface,
 182                                   G_TYPE_DBUS_PROXY,
 183                                   proxy_flags,
 184                                   on_proxy_appeared,
 185                                   on_proxy_vanished,
 186                                   NULL,
 187                                   NULL);
 188
 189   loop = g_main_loop_new (NULL, FALSE);
 190   g_main_loop_run (loop);
 191
 192   g_bus_unwatch_proxy (watcher_id);
 193
 194  out:
 195   g_option_context_free (opt_context);
 196   g_free (opt_name);
 197   g_free (opt_object_path);
 198   g_free (opt_interface);
 199
 200   return 0;
 201 }