gio/gdbusnameowning.c

   1 /* GDBus - GLib D-Bus Library
   2  *
   3  * Copyright (C) 2008-2009 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Author: David Zeuthen <davidz@redhat.com>
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdlib.h>
  26
  27 #include "gdbusutils.h"
  28 #include "gdbusnameowning.h"
  29 #include "gdbuserror.h"
  30 #include "gdbusprivate.h"
  31 #include "gdbusconnection.h"
  32
  33 #include "glibintl.h"
  34 #include "gioalias.h"
  35
  36 /**
  37  * SECTION:gdbusnameowning
  38  * @title: Owning Bus Names
  39  * @short_description: Simple API for owning bus names
  40  * @include: gio/gio.h
  41  *
  42  * Convenience API for owning bus names.
  43  *
  44  * <example id="gdbus-owning-names"><title>Simple application owning a name</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-own-name.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
  45  */
  46
  47 G_LOCK_DEFINE_STATIC (lock);
  48
  49 /* ---------------------------------------------------------------------------------------------------- */
  50
  51 typedef enum
  52 {
  53   PREVIOUS_CALL_NONE = 0,
  54   PREVIOUS_CALL_ACQUIRED,
  55   PREVIOUS_CALL_LOST,
  56 } PreviousCall;
  57
  58 typedef struct
  59 {
  60   volatile gint             ref_count;
  61   guint                     id;
  62   GBusNameOwnerFlags        flags;
  63   gchar                    *name;
  64   GBusAcquiredCallback      bus_acquired_handler;
  65   GBusNameAcquiredCallback  name_acquired_handler;
  66   GBusNameLostCallback      name_lost_handler;
  67   gpointer                  user_data;
  68   GDestroyNotify            user_data_free_func;
  69   GMainContext             *main_context;
  70
  71   PreviousCall              previous_call;
  72
  73   GDBusConnection          *connection;
  74   gulong                    disconnected_signal_handler_id;
  75   guint                     name_acquired_subscription_id;
  76   guint                     name_lost_subscription_id;
  77
  78   gboolean                  cancelled;
  79
  80   gboolean                  needs_release;
  81 } Client;
  82
  83 static guint next_global_id = 1;
  84 static GHashTable *map_id_to_client = NULL;
  85
  86
  87 static Client *
  88 client_ref (Client *client)
  89 {
  90   g_atomic_int_inc (&client->ref_count);
  91   return client;
  92 }
  93
  94 static void
  95 client_unref (Client *client)
  96 {
  97   if (g_atomic_int_dec_and_test (&client->ref_count))
  98     {
  99       if (client->connection != NULL)
 100         {
 101           if (client->disconnected_signal_handler_id > 0)
 102             g_signal_handler_disconnect (client->connection, client->disconnected_signal_handler_id);
 103           if (client->name_acquired_subscription_id > 0)
 104             g_dbus_connection_signal_unsubscribe (client->connection, client->name_acquired_subscription_id);
 105           if (client->name_lost_subscription_id > 0)
 106             g_dbus_connection_signal_unsubscribe (client->connection, client->name_lost_subscription_id);
 107           g_object_unref (client->connection);
 108         }
 109       if (client->main_context != NULL)
 110         g_main_context_unref (client->main_context);
 111       g_free (client->name);
 112       if (client->user_data_free_func != NULL)
 113         client->user_data_free_func (client->user_data);
 114       g_free (client);
 115     }
 116 }
 117
 118 /* ---------------------------------------------------------------------------------------------------- */
 119
 120
 121 typedef enum
 122 {
 123   CALL_TYPE_NAME_ACQUIRED,
 124   CALL_TYPE_NAME_LOST
 125 } CallType;
 126
 127 typedef struct
 128 {
 129   Client *client;
 130
 131   /* keep this separate because client->connection may
 132    * be set to NULL after scheduling the call
 133    */
 134   GDBusConnection *connection;
 135
 136   /* set to TRUE to call acquired */
 137   CallType call_type;
 138 } CallHandlerData;
 139
 140 static void
 141 call_handler_data_free (CallHandlerData *data)
 142 {
 143   if (data->connection != NULL)
 144     g_object_unref (data->connection);
 145   client_unref (data->client);
 146   g_free (data);
 147 }
 148
 149 static void
 150 actually_do_call (Client *client, GDBusConnection *connection, CallType call_type)
 151 {
 152   switch (call_type)
 153     {
 154     case CALL_TYPE_NAME_ACQUIRED:
 155       if (client->name_acquired_handler != NULL)
 156         {
 157           client->name_acquired_handler (connection,
 158                                          client->name,
 159                                          client->user_data);
 160         }
 161       break;
 162
 163     case CALL_TYPE_NAME_LOST:
 164       if (client->name_lost_handler != NULL)
 165         {
 166           client->name_lost_handler (connection,
 167                                      client->name,
 168                                      client->user_data);
 169         }
 170       break;
 171
 172     default:
 173       g_assert_not_reached ();
 174       break;
 175     }
 176 }
 177
 178 static gboolean
 179 call_in_idle_cb (gpointer _data)
 180 {
 181   CallHandlerData *data = _data;
 182   actually_do_call (data->client, data->connection, data->call_type);
 183   return FALSE;
 184 }
 185
 186 static void
 187 schedule_call_in_idle (Client *client, CallType  call_type)
 188 {
 189   CallHandlerData *data;
 190   GSource *idle_source;
 191
 192   data = g_new0 (CallHandlerData, 1);
 193   data->client = client_ref (client);
 194   data->connection = client->connection != NULL ? g_object_ref (client->connection) : NULL;
 195   data->call_type = call_type;
 196
 197   idle_source = g_idle_source_new ();
 198   g_source_set_priority (idle_source, G_PRIORITY_HIGH);
 199   g_source_set_callback (idle_source,
 200                          call_in_idle_cb,
 201                          data,
 202                          (GDestroyNotify) call_handler_data_free);
 203   g_source_attach (idle_source, client->main_context);
 204   g_source_unref (idle_source);
 205 }
 206
 207 static void
 208 do_call (Client *client, CallType call_type)
 209 {
 210   /* only schedule in idle if we're not in the right thread */
 211   if (g_main_context_get_thread_default () != client->main_context)
 212     schedule_call_in_idle (client, call_type);
 213   else
 214     actually_do_call (client, client->connection, call_type);
 215 }
 216
 217 static void
 218 call_acquired_handler (Client *client)
 219 {
 220   if (client->previous_call != PREVIOUS_CALL_ACQUIRED)
 221     {
 222       client->previous_call = PREVIOUS_CALL_ACQUIRED;
 223       if (!client->cancelled)
 224         {
 225           do_call (client, CALL_TYPE_NAME_ACQUIRED);
 226         }
 227     }
 228 }
 229
 230 static void
 231 call_lost_handler (Client  *client)
 232 {
 233   if (client->previous_call != PREVIOUS_CALL_LOST)
 234     {
 235       client->previous_call = PREVIOUS_CALL_LOST;
 236       if (!client->cancelled)
 237         {
 238           do_call (client, CALL_TYPE_NAME_LOST);
 239         }
 240     }
 241 }
 242
 243 /* ---------------------------------------------------------------------------------------------------- */
 244
 245 static void
 246 on_name_lost_or_acquired (GDBusConnection  *connection,
 247                           const gchar      *sender_name,
 248                           const gchar      *object_path,
 249                           const gchar      *interface_name,
 250                           const gchar      *signal_name,
 251                           GVariant         *parameters,
 252                           gpointer          user_data)
 253 {
 254   Client *client = user_data;
 255   const gchar *name;
 256
 257   if (g_strcmp0 (object_path, "/org/freedesktop/DBus") != 0 ||
 258       g_strcmp0 (interface_name, "org.freedesktop.DBus") != 0 ||
 259       g_strcmp0 (sender_name, "org.freedesktop.DBus") != 0)
 260     goto out;
 261
 262   if (g_strcmp0 (signal_name, "NameLost") == 0)
 263     {
 264       g_variant_get (parameters, "(s)", &name);
 265       if (g_strcmp0 (name, client->name) == 0)
 266         {
 267           call_lost_handler (client);
 268         }
 269     }
 270   else if (g_strcmp0 (signal_name, "NameAcquired") == 0)
 271     {
 272       g_variant_get (parameters, "(s)", &name);
 273       if (g_strcmp0 (name, client->name) == 0)
 274         {
 275           call_acquired_handler (client);
 276         }
 277     }
 278  out:
 279   ;
 280 }
 281
 282 /* ---------------------------------------------------------------------------------------------------- */
 283
 284 static void
 285 request_name_cb (GObject      *source_object,
 286                  GAsyncResult *res,
 287                  gpointer      user_data)
 288 {
 289   Client *client = user_data;
 290   GVariant *result;
 291   guint32 request_name_reply;
 292   gboolean subscribe;
 293
 294   request_name_reply = 0;
 295   result = NULL;
 296
 297   result = g_dbus_connection_invoke_method_finish (client->connection,
 298                                                    res,
 299                                                    NULL);
 300   if (result != NULL)
 301     {
 302       g_variant_get (result, "(u)", &request_name_reply);
 303       g_variant_unref (result);
 304     }
 305
 306   subscribe = FALSE;
 307
 308   switch (request_name_reply)
 309     {
 310     case 1: /* DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER */
 311       /* We got the name - now listen for NameLost and NameAcquired */
 312       call_acquired_handler (client);
 313       subscribe = TRUE;
 314       client->needs_release = TRUE;
 315       break;
 316
 317     case 2: /* DBUS_REQUEST_NAME_REPLY_IN_QUEUE */
 318       /* Waiting in line - listen for NameLost and NameAcquired */
 319       call_lost_handler (client);
 320       subscribe = TRUE;
 321       client->needs_release = TRUE;
 322       break;
 323
 324     default:
 325       /* assume we couldn't get the name - explicit fallthrough */
 326     case 3: /* DBUS_REQUEST_NAME_REPLY_EXISTS */
 327     case 4: /* DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER */
 328       /* Some other part of the process is already owning the name */
 329       call_lost_handler (client);
 330       break;
 331     }
 332
 333   if (subscribe)
 334     {
 335       /* start listening to NameLost and NameAcquired messages */
 336       client->name_lost_subscription_id =
 337         g_dbus_connection_signal_subscribe (client->connection,
 338                                             "org.freedesktop.DBus",
 339                                             "org.freedesktop.DBus",
 340                                             "NameLost",
 341                                             "/org/freedesktop/DBus",
 342                                             client->name,
 343                                             on_name_lost_or_acquired,
 344                                             client,
 345                                             NULL);
 346       client->name_acquired_subscription_id =
 347         g_dbus_connection_signal_subscribe (client->connection,
 348                                             "org.freedesktop.DBus",
 349                                             "org.freedesktop.DBus",
 350                                             "NameAcquired",
 351                                             "/org/freedesktop/DBus",
 352                                             client->name,
 353                                             on_name_lost_or_acquired,
 354                                             client,
 355                                             NULL);
 356     }
 357
 358   client_unref (client);
 359 }
 360
 361 /* ---------------------------------------------------------------------------------------------------- */
 362
 363 static void
 364 on_connection_disconnected (GDBusConnection *connection,
 365                             gboolean         remote_peer_vanished,
 366                             GError          *error,
 367                             gpointer         user_data)
 368 {
 369   Client *client = user_data;
 370
 371   if (client->disconnected_signal_handler_id > 0)
 372     g_signal_handler_disconnect (client->connection, client->disconnected_signal_handler_id);
 373   if (client->name_acquired_subscription_id > 0)
 374     g_dbus_connection_signal_unsubscribe (client->connection, client->name_acquired_subscription_id);
 375   if (client->name_lost_subscription_id > 0)
 376     g_dbus_connection_signal_unsubscribe (client->connection, client->name_lost_subscription_id);
 377   g_object_unref (client->connection);
 378   client->disconnected_signal_handler_id = 0;
 379   client->name_acquired_subscription_id = 0;
 380   client->name_lost_subscription_id = 0;
 381   client->connection = NULL;
 382
 383   call_lost_handler (client);
 384 }
 385
 386 /* ---------------------------------------------------------------------------------------------------- */
 387
 388 static void
 389 has_connection (Client *client)
 390 {
 391   /* listen for disconnection */
 392   client->disconnected_signal_handler_id = g_signal_connect (client->connection,
 393                                                              "closed",
 394                                                              G_CALLBACK (on_connection_disconnected),
 395                                                              client);
 396
 397   /* attempt to acquire the name */
 398   g_dbus_connection_invoke_method (client->connection,
 399                                    "org.freedesktop.DBus",  /* bus name */
 400                                    "/org/freedesktop/DBus", /* object path */
 401                                    "org.freedesktop.DBus",  /* interface name */
 402                                    "RequestName",           /* method name */
 403                                    g_variant_new ("(su)",
 404                                                   client->name,
 405                                                   client->flags),
 406                                    G_DBUS_INVOKE_METHOD_FLAGS_NONE,
 407                                    -1,
 408                                    NULL,
 409                                    (GAsyncReadyCallback) request_name_cb,
 410                                    client_ref (client));
 411 }
 412
 413
 414 static void
 415 connection_get_cb (GObject      *source_object,
 416                    GAsyncResult *res,
 417                    gpointer      user_data)
 418 {
 419   Client *client = user_data;
 420
 421   client->connection = g_bus_get_finish (res, NULL);
 422   if (client->connection == NULL)
 423     {
 424       call_lost_handler (client);
 425       goto out;
 426     }
 427
 428   /* No need to schedule this in idle as we're already in the thread
 429    * that the user called g_bus_own_name() from. This is because
 430    * g_bus_get() guarantees that.
 431    *
 432    * Also, we need to ensure that the handler is invoked *before*
 433    * we call RequestName(). Otherwise there is a race.
 434    */
 435   if (client->bus_acquired_handler != NULL)
 436     {
 437       client->bus_acquired_handler (client->connection,
 438                                     client->name,
 439                                     client->user_data);
 440     }
 441
 442   has_connection (client);
 443
 444  out:
 445   client_unref (client);
 446 }
 447
 448 /* ---------------------------------------------------------------------------------------------------- */
 449
 450 /**
 451  * g_bus_own_name_on_connection:
 452  * @connection: A #GDBusConnection that is not closed.
 453  * @name: The well-known name to own.
 454  * @flags: A set of flags from the #GBusNameOwnerFlags enumeration.
 455  * @name_acquired_handler: Handler to invoke when @name is acquired or %NULL.
 456  * @name_lost_handler: Handler to invoke when @name is lost or %NULL.
 457  * @user_data: User data to pass to handlers.
 458  * @user_data_free_func: Function for freeing @user_data or %NULL.
 459  *
 460  * Like g_bus_own_name() but takes a #GDBusConnection instead of a
 461  * #GBusType.
 462  *
 463  * Returns: An identifier (never 0) that an be used with
 464  * g_bus_unown_name() to stop owning the name.
 465  *
 466  * Since: 2.26
 467  */
 468 guint
 469 g_bus_own_name_on_connection (GDBusConnection          *connection,
 470                               const gchar              *name,
 471                               GBusNameOwnerFlags        flags,
 472                               GBusNameAcquiredCallback  name_acquired_handler,
 473                               GBusNameLostCallback      name_lost_handler,
 474                               gpointer                  user_data,
 475                               GDestroyNotify            user_data_free_func)
 476 {
 477   Client *client;
 478
 479   g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
 480   g_return_val_if_fail (!g_dbus_connection_is_closed (connection), 0);
 481   g_return_val_if_fail (g_dbus_is_name (name) && !g_dbus_is_unique_name (name), 0);
 482
 483   G_LOCK (lock);
 484
 485   client = g_new0 (Client, 1);
 486   client->ref_count = 1;
 487   client->id = next_global_id++; /* TODO: uh oh, handle overflow */
 488   client->name = g_strdup (name);
 489   client->flags = flags;
 490   client->name_acquired_handler = name_acquired_handler;
 491   client->name_lost_handler = name_lost_handler;
 492   client->user_data = user_data;
 493   client->user_data_free_func = user_data_free_func;
 494   client->main_context = g_main_context_get_thread_default ();
 495   if (client->main_context != NULL)
 496     g_main_context_ref (client->main_context);
 497
 498   client->connection = g_object_ref (connection);
 499
 500   if (map_id_to_client == NULL)
 501     {
 502       map_id_to_client = g_hash_table_new (g_direct_hash, g_direct_equal);
 503     }
 504   g_hash_table_insert (map_id_to_client,
 505                        GUINT_TO_POINTER (client->id),
 506                        client);
 507
 508   G_UNLOCK (lock);
 509
 510   has_connection (client);
 511
 512   return client->id;
 513 }
 514
 515 /**
 516  * g_bus_own_name:
 517  * @bus_type: The type of bus to own a name on.
 518  * @name: The well-known name to own.
 519  * @flags: A set of flags from the #GBusNameOwnerFlags enumeration.
 520  * @bus_acquired_handler: Handler to invoke when connected to the bus of type @bus_type or %NULL.
 521  * @name_acquired_handler: Handler to invoke when @name is acquired or %NULL.
 522  * @name_lost_handler: Handler to invoke when @name is lost or %NULL.
 523  * @user_data: User data to pass to handlers.
 524  * @user_data_free_func: Function for freeing @user_data or %NULL.
 525  *
 526  * Starts acquiring @name on the bus specified by @bus_type and calls
 527  * @name_acquired_handler and @name_lost_handler when the name is
 528  * acquired respectively lost. Callbacks will be invoked in the <link
 529  * linkend="g-main-context-push-thread-default">thread-default main
 530  * loop</link> of the thread you are calling this function from.
 531  *
 532  * You are guaranteed that one of the @name_acquired_handler and @name_lost_handler
 533  * callbacks will be invoked after calling this function - there are three
 534  * possible cases:
 535  * <itemizedlist>
 536  *   <listitem><para>
 537  *     @name_lost_handler with a %NULL connection (if a connection to the bus can't be made).
 538  *   </para></listitem>
 539  *   <listitem><para>
 540  *     @bus_acquired_handler then @name_lost_handler (if the name can't be obtained)
 541  *   </para></listitem>
 542  *   <listitem><para>
 543  *     @bus_acquired_handler then @name_acquired_handler (if the name was obtained).
 544  *   </para></listitem>
 545  * </itemizedlist>
 546  * When you are done owning the name, just call g_bus_unown_name()
 547  * with the owner id this function returns.
 548  *
 549  * If the name is acquired or lost (for example another application
 550  * could acquire the name if you allow replacement or the application
 551  * currently owning the name exits), the handlers are also invoked. If the
 552  * #GDBusConnection that is used for attempting to own the name
 553  * closes, then @name_lost_handler is invoked since it is no
 554  * longer possible for other processes to access the process.
 555  *
 556  * You cannot use g_bus_own_name() several times (unless interleaved
 557  * with calls to g_bus_unown_name()) - only the first call will work.
 558  *
 559  * Another guarantee is that invocations of @name_acquired_handler
 560  * and @name_lost_handler are guaranteed to alternate; that
 561  * is, if @name_acquired_handler is invoked then you are
 562  * guaranteed that the next time one of the handlers is invoked, it
 563  * will be @name_lost_handler. The reverse is also true.
 564  *
 565  * If you plan on exporting objects (using e.g. g_dbus_connection_register_object()), note
 566  * that it is generally too late to export the objects in @name_acquired_handler. Instead,
 567  * you can do this in @bus_acquired_handler since you are guaranteed that this will
 568  * run before @name is requested from the bus.
 569  *
 570  * This behavior makes it very simple to write applications that wants
 571  * to own names and export objects, see <xref linkend="gdbus-owning-names"/>. Simply
 572  * register objects to be exported in @bus_acquired_handler and
 573  * unregister the objects (if any) in @name_lost_handler.
 574  *
 575  * Returns: An identifier (never 0) that an be used with
 576  * g_bus_unown_name() to stop owning the name.
 577  *
 578  * Since: 2.26
 579  */
 580 guint
 581 g_bus_own_name (GBusType                  bus_type,
 582                 const gchar              *name,
 583                 GBusNameOwnerFlags        flags,
 584                 GBusAcquiredCallback      bus_acquired_handler,
 585                 GBusNameAcquiredCallback  name_acquired_handler,
 586                 GBusNameLostCallback      name_lost_handler,
 587                 gpointer                  user_data,
 588                 GDestroyNotify            user_data_free_func)
 589 {
 590   Client *client;
 591
 592   g_return_val_if_fail (bus_type != G_BUS_TYPE_NONE, 0);
 593   g_return_val_if_fail (g_dbus_is_name (name) && !g_dbus_is_unique_name (name), 0);
 594
 595   G_LOCK (lock);
 596
 597   client = g_new0 (Client, 1);
 598   client->ref_count = 1;
 599   client->id = next_global_id++; /* TODO: uh oh, handle overflow */
 600   client->name = g_strdup (name);
 601   client->flags = flags;
 602   client->bus_acquired_handler = bus_acquired_handler;
 603   client->name_acquired_handler = name_acquired_handler;
 604   client->name_lost_handler = name_lost_handler;
 605   client->user_data = user_data;
 606   client->user_data_free_func = user_data_free_func;
 607   client->main_context = g_main_context_get_thread_default ();
 608   if (client->main_context != NULL)
 609     g_main_context_ref (client->main_context);
 610
 611   if (map_id_to_client == NULL)
 612     {
 613       map_id_to_client = g_hash_table_new (g_direct_hash, g_direct_equal);
 614     }
 615   g_hash_table_insert (map_id_to_client,
 616                        GUINT_TO_POINTER (client->id),
 617                        client);
 618
 619   g_bus_get (bus_type,
 620              NULL,
 621              connection_get_cb,
 622              client_ref (client));
 623
 624   G_UNLOCK (lock);
 625
 626   return client->id;
 627 }
 628
 629 /**
 630  * g_bus_unown_name:
 631  * @owner_id: An identifier obtained from g_bus_own_name()
 632  *
 633  * Stops owning a name.
 634  *
 635  * Since: 2.26
 636  */
 637 void
 638 g_bus_unown_name (guint owner_id)
 639 {
 640   Client *client;
 641
 642   g_return_if_fail (owner_id > 0);
 643
 644   client = NULL;
 645
 646   G_LOCK (lock);
 647   if (owner_id == 0 || map_id_to_client == NULL ||
 648       (client = g_hash_table_lookup (map_id_to_client, GUINT_TO_POINTER (owner_id))) == NULL)
 649     {
 650       g_warning ("Invalid id %d passed to g_bus_unown_name()", owner_id);
 651       goto out;
 652     }
 653
 654   client->cancelled = TRUE;
 655   g_warn_if_fail (g_hash_table_remove (map_id_to_client, GUINT_TO_POINTER (owner_id)));
 656
 657  out:
 658   G_UNLOCK (lock);
 659
 660   /* do callback without holding lock */
 661   if (client != NULL)
 662     {
 663       /* Release the name if needed */
 664       if (client->needs_release && client->connection != NULL)
 665         {
 666           GVariant *result;
 667           GError *error;
 668           guint32 release_name_reply;
 669
 670           /* TODO: it kinda sucks having to do a sync call to release the name - but if
 671            * we don't, then a subsequent grab of the name will make the bus daemon return
 672            * IN_QUEUE which will trigger name_lost().
 673            *
 674            * I believe this is a bug in the bus daemon.
 675            */
 676           error = NULL;
 677           result = g_dbus_connection_invoke_method_sync (client->connection,
 678                                                          "org.freedesktop.DBus",  /* bus name */
 679                                                          "/org/freedesktop/DBus", /* object path */
 680                                                          "org.freedesktop.DBus",  /* interface name */
 681                                                          "ReleaseName",           /* method name */
 682                                                          g_variant_new ("(s)", client->name),
 683                                                          G_DBUS_INVOKE_METHOD_FLAGS_NONE,
 684                                                          -1,
 685                                                          NULL,
 686                                                          &error);
 687           if (result == NULL)
 688             {
 689               g_warning ("Error releasing name %s: %s", client->name, error->message);
 690               g_error_free (error);
 691             }
 692           else
 693             {
 694               g_variant_get (result, "(u)", &release_name_reply);
 695               if (release_name_reply != 1 /* DBUS_RELEASE_NAME_REPLY_RELEASED */)
 696                 {
 697                   g_warning ("Unexpected reply %d when releasing name %s", release_name_reply, client->name);
 698                 }
 699               g_variant_unref (result);
 700             }
 701         }
 702
 703       if (client->disconnected_signal_handler_id > 0)
 704         g_signal_handler_disconnect (client->connection, client->disconnected_signal_handler_id);
 705       if (client->name_acquired_subscription_id > 0)
 706         g_dbus_connection_signal_unsubscribe (client->connection, client->name_acquired_subscription_id);
 707       if (client->name_lost_subscription_id > 0)
 708         g_dbus_connection_signal_unsubscribe (client->connection, client->name_lost_subscription_id);
 709       client->disconnected_signal_handler_id = 0;
 710       client->name_acquired_subscription_id = 0;
 711       client->name_lost_subscription_id = 0;
 712       if (client->connection != NULL)
 713         {
 714           g_object_unref (client->connection);
 715           client->connection = NULL;
 716         }
 717
 718       client_unref (client);
 719     }
 720 }
 721
 722 #define __G_DBUS_NAME_OWNING_C__
 723 #include "gioaliasdef.c"