gio/gdbusobjectmanagerserver.c

   1 /* GDBus - GLib D-Bus Library
   2  *
   3  * Copyright (C) 2008-2010 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 2.1 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, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author: David Zeuthen <davidz@redhat.com>
  19  */
  20
  21 #include "config.h"
  22
  23 #include "gdbusobjectmanager.h"
  24 #include "gdbusobjectmanagerserver.h"
  25 #include "gdbusobject.h"
  26 #include "gdbusobjectskeleton.h"
  27 #include "gdbusinterfaceskeleton.h"
  28 #include "gdbusconnection.h"
  29 #include "gdbusintrospection.h"
  30 #include "gdbusmethodinvocation.h"
  31 #include "gdbuserror.h"
  32
  33 #include "gioerror.h"
  34
  35 #include "glibintl.h"
  36
  37 /**
  38  * SECTION:gdbusobjectmanagerserver
  39  * @short_description: Service-side object manager
  40  * @include: gio/gio.h
  41  *
  42  * #GDBusObjectManagerServer is used to export #GDBusObject instances using
  43  * the standardized
  44  * [org.freedesktop.DBus.ObjectManager](http://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-objectmanager)
  45  * interface. For example, remote D-Bus clients can get all objects
  46  * and properties in a single call. Additionally, any change in the
  47  * object hierarchy is broadcast using signals. This means that D-Bus
  48  * clients can keep caches up to date by only listening to D-Bus
  49  * signals.
  50  *
  51  * The recommended path to export an object manager at is the path form of the
  52  * well-known name of a D-Bus service, or below. For example, if a D-Bus service
  53  * is available at the well-known name `net.example.ExampleService1`, the object
  54  * manager should typically be exported at `/net/example/ExampleService1`, or
  55  * below (to allow for multiple object managers in a service).
  56  *
  57  * It is supported, but not recommended, to export an object manager at the root
  58  * path, `/`.
  59  *
  60  * See #GDBusObjectManagerClient for the client-side code that is
  61  * intended to be used with #GDBusObjectManagerServer or any D-Bus
  62  * object implementing the org.freedesktop.DBus.ObjectManager
  63  * interface.
  64  */
  65
  66 typedef struct
  67 {
  68   GDBusObjectSkeleton *object;
  69   GDBusObjectManagerServer *manager;
  70   GHashTable *map_iface_name_to_iface;
  71   gboolean exported;
  72 } RegistrationData;
  73
  74 static void registration_data_free (RegistrationData *data);
  75
  76 static void export_all (GDBusObjectManagerServer *manager);
  77 static void unexport_all (GDBusObjectManagerServer *manager, gboolean only_manager);
  78
  79 static void g_dbus_object_manager_server_emit_interfaces_added (GDBusObjectManagerServer *manager,
  80                                                          RegistrationData   *data,
  81                                                          const gchar *const *interfaces,
  82                                                          const gchar *object_path);
  83
  84 static void g_dbus_object_manager_server_emit_interfaces_removed (GDBusObjectManagerServer *manager,
  85                                                            RegistrationData   *data,
  86                                                            const gchar *const *interfaces);
  87
  88 static gboolean g_dbus_object_manager_server_unexport_unlocked (GDBusObjectManagerServer  *manager,
  89                                                                 const gchar               *object_path);
  90
  91 struct _GDBusObjectManagerServerPrivate
  92 {
  93   GMutex lock;
  94   GDBusConnection *connection;
  95   gchar *object_path;
  96   gchar *object_path_ending_in_slash;
  97   GHashTable *map_object_path_to_data;
  98   guint manager_reg_id;
  99 };
 100
 101 enum
 102 {
 103   PROP_0,
 104   PROP_CONNECTION,
 105   PROP_OBJECT_PATH
 106 };
 107
 108 static void dbus_object_manager_interface_init (GDBusObjectManagerIface *iface);
 109
 110 G_DEFINE_TYPE_WITH_CODE (GDBusObjectManagerServer, g_dbus_object_manager_server, G_TYPE_OBJECT,
 111                          G_ADD_PRIVATE (GDBusObjectManagerServer)
 112                          G_IMPLEMENT_INTERFACE (G_TYPE_DBUS_OBJECT_MANAGER, dbus_object_manager_interface_init))
 113
 114 static void g_dbus_object_manager_server_constructed (GObject *object);
 115
 116 static void
 117 g_dbus_object_manager_server_finalize (GObject *object)
 118 {
 119   GDBusObjectManagerServer *manager = G_DBUS_OBJECT_MANAGER_SERVER (object);
 120
 121   if (manager->priv->connection != NULL)
 122     {
 123       unexport_all (manager, TRUE);
 124       g_object_unref (manager->priv->connection);
 125     }
 126   g_hash_table_unref (manager->priv->map_object_path_to_data);
 127   g_free (manager->priv->object_path);
 128   g_free (manager->priv->object_path_ending_in_slash);
 129
 130   g_mutex_clear (&manager->priv->lock);
 131
 132   if (G_OBJECT_CLASS (g_dbus_object_manager_server_parent_class)->finalize != NULL)
 133     G_OBJECT_CLASS (g_dbus_object_manager_server_parent_class)->finalize (object);
 134 }
 135
 136 static void
 137 g_dbus_object_manager_server_get_property (GObject    *object,
 138                                            guint       prop_id,
 139                                            GValue     *value,
 140                                            GParamSpec *pspec)
 141 {
 142   GDBusObjectManagerServer *manager = G_DBUS_OBJECT_MANAGER_SERVER (object);
 143
 144   switch (prop_id)
 145     {
 146     case PROP_CONNECTION:
 147       g_mutex_lock (&manager->priv->lock);
 148       g_value_set_object (value, manager->priv->connection);
 149       g_mutex_unlock (&manager->priv->lock);
 150       break;
 151
 152     case PROP_OBJECT_PATH:
 153       g_value_set_string (value, g_dbus_object_manager_get_object_path (G_DBUS_OBJECT_MANAGER (manager)));
 154       break;
 155
 156     default:
 157       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 158       break;
 159     }
 160 }
 161
 162 static void
 163 g_dbus_object_manager_server_set_property (GObject       *object,
 164                                            guint          prop_id,
 165                                            const GValue  *value,
 166                                            GParamSpec    *pspec)
 167 {
 168   GDBusObjectManagerServer *manager = G_DBUS_OBJECT_MANAGER_SERVER (object);
 169
 170   switch (prop_id)
 171     {
 172     case PROP_CONNECTION:
 173       g_dbus_object_manager_server_set_connection (manager, g_value_get_object (value));
 174       break;
 175
 176     case PROP_OBJECT_PATH:
 177       g_assert (manager->priv->object_path == NULL);
 178       g_assert (g_variant_is_object_path (g_value_get_string (value)));
 179       manager->priv->object_path = g_value_dup_string (value);
 180       if (g_str_equal (manager->priv->object_path, "/"))
 181         manager->priv->object_path_ending_in_slash = g_strdup (manager->priv->object_path);
 182       else
 183         manager->priv->object_path_ending_in_slash = g_strdup_printf ("%s/", manager->priv->object_path);
 184       break;
 185
 186     default:
 187       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 188       break;
 189     }
 190 }
 191
 192 static void
 193 g_dbus_object_manager_server_class_init (GDBusObjectManagerServerClass *klass)
 194 {
 195   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 196
 197   gobject_class->finalize     = g_dbus_object_manager_server_finalize;
 198   gobject_class->constructed  = g_dbus_object_manager_server_constructed;
 199   gobject_class->set_property = g_dbus_object_manager_server_set_property;
 200   gobject_class->get_property = g_dbus_object_manager_server_get_property;
 201
 202   /**
 203    * GDBusObjectManagerServer:connection:
 204    *
 205    * The #GDBusConnection to export objects on.
 206    *
 207    * Since: 2.30
 208    */
 209   g_object_class_install_property (gobject_class,
 210                                    PROP_CONNECTION,
 211                                    g_param_spec_object ("connection",
 212                                                         "Connection",
 213                                                         "The connection to export objects on",
 214                                                         G_TYPE_DBUS_CONNECTION,
 215                                                         G_PARAM_READABLE |
 216                                                         G_PARAM_WRITABLE |
 217                                                         G_PARAM_STATIC_STRINGS));
 218
 219   /**
 220    * GDBusObjectManagerServer:object-path:
 221    *
 222    * The object path to register the manager object at.
 223    *
 224    * Since: 2.30
 225    */
 226   g_object_class_install_property (gobject_class,
 227                                    PROP_OBJECT_PATH,
 228                                    g_param_spec_string ("object-path",
 229                                                         "Object Path",
 230                                                         "The object path to register the manager object at",
 231                                                         NULL,
 232                                                         G_PARAM_READABLE |
 233                                                         G_PARAM_WRITABLE |
 234                                                         G_PARAM_CONSTRUCT_ONLY |
 235                                                         G_PARAM_STATIC_STRINGS));
 236 }
 237
 238 static void
 239 g_dbus_object_manager_server_init (GDBusObjectManagerServer *manager)
 240 {
 241   manager->priv = g_dbus_object_manager_server_get_instance_private (manager);
 242   g_mutex_init (&manager->priv->lock);
 243   manager->priv->map_object_path_to_data = g_hash_table_new_full (g_str_hash,
 244                                                                   g_str_equal,
 245                                                                   g_free,
 246                                                                   (GDestroyNotify) registration_data_free);
 247 }
 248
 249 /**
 250  * g_dbus_object_manager_server_new:
 251  * @object_path: The object path to export the manager object at.
 252  *
 253  * Creates a new #GDBusObjectManagerServer object.
 254  *
 255  * The returned server isn't yet exported on any connection. To do so,
 256  * use g_dbus_object_manager_server_set_connection(). Normally you
 257  * want to export all of your objects before doing so to avoid
 258  * [InterfacesAdded](http://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-objectmanager)
 259  * signals being emitted.
 260  *
 261  * Returns: A #GDBusObjectManagerServer object. Free with g_object_unref().
 262  *
 263  * Since: 2.30
 264  */
 265 GDBusObjectManagerServer *
 266 g_dbus_object_manager_server_new (const gchar     *object_path)
 267 {
 268   g_return_val_if_fail (g_variant_is_object_path (object_path), NULL);
 269   return G_DBUS_OBJECT_MANAGER_SERVER (g_object_new (G_TYPE_DBUS_OBJECT_MANAGER_SERVER,
 270                                                      "object-path", object_path,
 271                                                      NULL));
 272 }
 273
 274 /**
 275  * g_dbus_object_manager_server_set_connection:
 276  * @manager: A #GDBusObjectManagerServer.
 277  * @connection: (nullable): A #GDBusConnection or %NULL.
 278  *
 279  * Exports all objects managed by @manager on @connection. If
 280  * @connection is %NULL, stops exporting objects.
 281  */
 282 void
 283 g_dbus_object_manager_server_set_connection (GDBusObjectManagerServer  *manager,
 284                                              GDBusConnection           *connection)
 285 {
 286   g_return_if_fail (G_IS_DBUS_OBJECT_MANAGER_SERVER (manager));
 287   g_return_if_fail (connection == NULL || G_IS_DBUS_CONNECTION (connection));
 288
 289   g_mutex_lock (&manager->priv->lock);
 290
 291   if (manager->priv->connection == connection)
 292     {
 293       g_mutex_unlock (&manager->priv->lock);
 294       goto out;
 295     }
 296
 297   if (manager->priv->connection != NULL)
 298     {
 299       unexport_all (manager, FALSE);
 300       g_object_unref (manager->priv->connection);
 301       manager->priv->connection = NULL;
 302     }
 303
 304   manager->priv->connection = connection != NULL ? g_object_ref (connection) : NULL;
 305   if (manager->priv->connection != NULL)
 306     export_all (manager);
 307
 308   g_mutex_unlock (&manager->priv->lock);
 309
 310   g_object_notify (G_OBJECT (manager), "connection");
 311  out:
 312   ;
 313 }
 314
 315 /**
 316  * g_dbus_object_manager_server_get_connection:
 317  * @manager: A #GDBusObjectManagerServer
 318  *
 319  * Gets the #GDBusConnection used by @manager.
 320  *
 321  * Returns: (transfer full): A #GDBusConnection object or %NULL if
 322  *   @manager isn't exported on a connection. The returned object should
 323  *   be freed with g_object_unref().
 324  *
 325  * Since: 2.30
 326  */
 327 GDBusConnection *
 328 g_dbus_object_manager_server_get_connection (GDBusObjectManagerServer *manager)
 329 {
 330   GDBusConnection *ret;
 331   g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_SERVER (manager), NULL);
 332   g_mutex_lock (&manager->priv->lock);
 333   ret = manager->priv->connection != NULL ? g_object_ref (manager->priv->connection) : NULL;
 334   g_mutex_unlock (&manager->priv->lock);
 335   return ret;
 336 }
 337
 338 /* ---------------------------------------------------------------------------------------------------- */
 339
 340 static void
 341 registration_data_export_interface (RegistrationData        *data,
 342                                     GDBusInterfaceSkeleton  *interface_skeleton,
 343                                     const gchar             *object_path)
 344 {
 345   GDBusInterfaceInfo *info;
 346   GError *error;
 347
 348   info = g_dbus_interface_skeleton_get_info (interface_skeleton);
 349   error = NULL;
 350   if (data->manager->priv->connection != NULL)
 351     {
 352       if (!g_dbus_interface_skeleton_export (interface_skeleton,
 353                                              data->manager->priv->connection,
 354                                              object_path,
 355                                              &error))
 356         {
 357           g_warning ("%s: Error registering object at %s with interface %s: %s",
 358                      G_STRLOC,
 359                      object_path,
 360                      info->name,
 361                      error->message);
 362           g_error_free (error);
 363         }
 364     }
 365
 366   g_assert (g_hash_table_lookup (data->map_iface_name_to_iface, info->name) == NULL);
 367   g_hash_table_insert (data->map_iface_name_to_iface,
 368                        info->name,
 369                        g_object_ref (interface_skeleton));
 370
 371   /* if we are already exported, then... */
 372   if (data->exported)
 373     {
 374       const gchar *interfaces[2];
 375       /* emit InterfacesAdded on the ObjectManager object */
 376       interfaces[0] = info->name;
 377       interfaces[1] = NULL;
 378       g_dbus_object_manager_server_emit_interfaces_added (data->manager, data, interfaces, object_path);
 379     }
 380 }
 381
 382 static void
 383 registration_data_unexport_interface (RegistrationData       *data,
 384                                       GDBusInterfaceSkeleton *interface_skeleton)
 385 {
 386   GDBusInterfaceInfo *info;
 387   GDBusInterfaceSkeleton *iface;
 388
 389   info = g_dbus_interface_skeleton_get_info (interface_skeleton);
 390   iface = g_hash_table_lookup (data->map_iface_name_to_iface, info->name);
 391   g_assert (iface != NULL);
 392
 393   if (data->manager->priv->connection != NULL)
 394     g_dbus_interface_skeleton_unexport (iface);
 395
 396   g_warn_if_fail (g_hash_table_remove (data->map_iface_name_to_iface, info->name));
 397
 398   /* if we are already exported, then... */
 399   if (data->exported)
 400     {
 401       const gchar *interfaces[2];
 402       /* emit InterfacesRemoved on the ObjectManager object */
 403       interfaces[0] = info->name;
 404       interfaces[1] = NULL;
 405       g_dbus_object_manager_server_emit_interfaces_removed (data->manager, data, interfaces);
 406     }
 407 }
 408
 409 /* ---------------------------------------------------------------------------------------------------- */
 410
 411 static void
 412 on_interface_added (GDBusObject    *object,
 413                     GDBusInterface *interface,
 414                     gpointer        user_data)
 415 {
 416   RegistrationData *data = user_data;
 417   const gchar *object_path;
 418   g_mutex_lock (&data->manager->priv->lock);
 419   object_path = g_dbus_object_get_object_path (G_DBUS_OBJECT (data->object));
 420   registration_data_export_interface (data, G_DBUS_INTERFACE_SKELETON (interface), object_path);
 421   g_mutex_unlock (&data->manager->priv->lock);
 422 }
 423
 424 static void
 425 on_interface_removed (GDBusObject    *object,
 426                       GDBusInterface *interface,
 427                       gpointer        user_data)
 428 {
 429   RegistrationData *data = user_data;
 430   g_mutex_lock (&data->manager->priv->lock);
 431   registration_data_unexport_interface (data, G_DBUS_INTERFACE_SKELETON (interface));
 432   g_mutex_unlock (&data->manager->priv->lock);
 433 }
 434
 435 /* ---------------------------------------------------------------------------------------------------- */
 436
 437
 438 static void
 439 registration_data_free (RegistrationData *data)
 440 {
 441   GHashTableIter iter;
 442   GDBusInterfaceSkeleton *iface;
 443
 444   data->exported = FALSE;
 445
 446   g_hash_table_iter_init (&iter, data->map_iface_name_to_iface);
 447   while (g_hash_table_iter_next (&iter, NULL, (gpointer) &iface))
 448     {
 449       if (data->manager->priv->connection != NULL)
 450         g_dbus_interface_skeleton_unexport (iface);
 451     }
 452
 453   g_signal_handlers_disconnect_by_func (data->object, G_CALLBACK (on_interface_added), data);
 454   g_signal_handlers_disconnect_by_func (data->object, G_CALLBACK (on_interface_removed), data);
 455   g_object_unref (data->object);
 456   g_hash_table_destroy (data->map_iface_name_to_iface);
 457   g_free (data);
 458 }
 459
 460 /* ---------------------------------------------------------------------------------------------------- */
 461
 462 static void
 463 g_dbus_object_manager_server_export_unlocked (GDBusObjectManagerServer  *manager,
 464                                               GDBusObjectSkeleton       *object,
 465                                               const gchar               *object_path)
 466 {
 467   RegistrationData *data;
 468   GList *existing_interfaces;
 469   GList *l;
 470   GPtrArray *interface_names;
 471
 472   g_return_if_fail (G_IS_DBUS_OBJECT_MANAGER_SERVER (manager));
 473   g_return_if_fail (G_IS_DBUS_OBJECT (object));
 474   g_return_if_fail (g_str_has_prefix (object_path, manager->priv->object_path_ending_in_slash));
 475
 476   interface_names = g_ptr_array_new ();
 477
 478   data = g_hash_table_lookup (manager->priv->map_object_path_to_data, object_path);
 479   if (data != NULL)
 480     g_dbus_object_manager_server_unexport_unlocked (manager, object_path);
 481
 482   data = g_new0 (RegistrationData, 1);
 483   data->object = g_object_ref (object);
 484   data->manager = manager;
 485   data->map_iface_name_to_iface = g_hash_table_new_full (g_str_hash,
 486                                                          g_str_equal,
 487                                                          NULL,
 488                                                          (GDestroyNotify) g_object_unref);
 489
 490   g_signal_connect (object,
 491                     "interface-added",
 492                     G_CALLBACK (on_interface_added),
 493                     data);
 494   g_signal_connect (object,
 495                     "interface-removed",
 496                     G_CALLBACK (on_interface_removed),
 497                     data);
 498
 499   /* Register all known interfaces - note that data->exported is FALSE so
 500    * we don't emit any InterfacesAdded signals.
 501    */
 502   existing_interfaces = g_dbus_object_get_interfaces (G_DBUS_OBJECT (object));
 503   for (l = existing_interfaces; l != NULL; l = l->next)
 504     {
 505       GDBusInterfaceSkeleton *interface_skeleton = G_DBUS_INTERFACE_SKELETON (l->data);
 506       registration_data_export_interface (data, interface_skeleton, object_path);
 507       g_ptr_array_add (interface_names, g_dbus_interface_skeleton_get_info (interface_skeleton)->name);
 508     }
 509   g_list_free_full (existing_interfaces, g_object_unref);
 510   g_ptr_array_add (interface_names, NULL);
 511
 512   data->exported = TRUE;
 513
 514   /* now emit InterfacesAdded() for all the interfaces */
 515   g_dbus_object_manager_server_emit_interfaces_added (manager, data, (const gchar *const *) interface_names->pdata, object_path);
 516   g_ptr_array_unref (interface_names);
 517
 518   g_hash_table_insert (manager->priv->map_object_path_to_data,
 519                        g_strdup (object_path),
 520                        data);
 521 }
 522
 523 /**
 524  * g_dbus_object_manager_server_export:
 525  * @manager: A #GDBusObjectManagerServer.
 526  * @object: A #GDBusObjectSkeleton.
 527  *
 528  * Exports @object on @manager.
 529  *
 530  * If there is already a #GDBusObject exported at the object path,
 531  * then the old object is removed.
 532  *
 533  * The object path for @object must be in the hierarchy rooted by the
 534  * object path for @manager.
 535  *
 536  * Note that @manager will take a reference on @object for as long as
 537  * it is exported.
 538  *
 539  * Since: 2.30
 540  */
 541 void
 542 g_dbus_object_manager_server_export (GDBusObjectManagerServer  *manager,
 543                                      GDBusObjectSkeleton       *object)
 544 {
 545   g_return_if_fail (G_IS_DBUS_OBJECT_MANAGER_SERVER (manager));
 546   g_mutex_lock (&manager->priv->lock);
 547   g_dbus_object_manager_server_export_unlocked (manager, object,
 548                                                 g_dbus_object_get_object_path (G_DBUS_OBJECT (object)));
 549   g_mutex_unlock (&manager->priv->lock);
 550 }
 551
 552 /**
 553  * g_dbus_object_manager_server_export_uniquely:
 554  * @manager: A #GDBusObjectManagerServer.
 555  * @object: An object.
 556  *
 557  * Like g_dbus_object_manager_server_export() but appends a string of
 558  * the form _N (with N being a natural number) to @object's object path
 559  * if an object with the given path already exists. As such, the
 560  * #GDBusObjectProxy:g-object-path property of @object may be modified.
 561  *
 562  * Since: 2.30
 563  */
 564 void
 565 g_dbus_object_manager_server_export_uniquely (GDBusObjectManagerServer *manager,
 566                                               GDBusObjectSkeleton      *object)
 567 {
 568   gchar *orig_object_path;
 569   gchar *object_path;
 570   guint count;
 571   gboolean modified;
 572
 573   orig_object_path = g_strdup (g_dbus_object_get_object_path (G_DBUS_OBJECT (object)));
 574
 575   g_return_if_fail (G_IS_DBUS_OBJECT_MANAGER_SERVER (manager));
 576   g_return_if_fail (G_IS_DBUS_OBJECT (object));
 577   g_return_if_fail (g_str_has_prefix (orig_object_path, manager->priv->object_path_ending_in_slash));
 578
 579   g_mutex_lock (&manager->priv->lock);
 580
 581   object_path = g_strdup (orig_object_path);
 582   count = 1;
 583   modified = FALSE;
 584   while (TRUE)
 585     {
 586       RegistrationData *data;
 587       data = g_hash_table_lookup (manager->priv->map_object_path_to_data, object_path);
 588       if (data == NULL)
 589         {
 590           break;
 591         }
 592       g_free (object_path);
 593       object_path = g_strdup_printf ("%s_%d", orig_object_path, count++);
 594       modified = TRUE;
 595     }
 596
 597   g_dbus_object_manager_server_export_unlocked (manager, object, object_path);
 598
 599   g_mutex_unlock (&manager->priv->lock);
 600
 601   if (modified)
 602     g_dbus_object_skeleton_set_object_path (G_DBUS_OBJECT_SKELETON (object), object_path);
 603
 604   g_free (object_path);
 605   g_free (orig_object_path);
 606
 607 }
 608
 609 /**
 610  * g_dbus_object_manager_server_is_exported:
 611  * @manager: A #GDBusObjectManagerServer.
 612  * @object: An object.
 613  *
 614  * Returns whether @object is currently exported on @manager.
 615  *
 616  * Returns: %TRUE if @object is exported
 617  *
 618  * Since: 2.34
 619  **/
 620 gboolean
 621 g_dbus_object_manager_server_is_exported (GDBusObjectManagerServer *manager,
 622                                           GDBusObjectSkeleton      *object)
 623 {
 624   RegistrationData *data = NULL;
 625   const gchar *object_path;
 626   gboolean object_is_exported;
 627
 628   g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_SERVER (manager), FALSE);
 629   g_return_val_if_fail (G_IS_DBUS_OBJECT (object), FALSE);
 630
 631   g_mutex_lock (&manager->priv->lock);
 632
 633   object_path = g_dbus_object_get_object_path (G_DBUS_OBJECT (object));
 634   if (object_path != NULL)
 635     data = g_hash_table_lookup (manager->priv->map_object_path_to_data, object_path);
 636   object_is_exported = (data != NULL);
 637
 638   g_mutex_unlock (&manager->priv->lock);
 639
 640   return object_is_exported;
 641 }
 642
 643 /* ---------------------------------------------------------------------------------------------------- */
 644
 645 static gboolean
 646 g_dbus_object_manager_server_unexport_unlocked (GDBusObjectManagerServer  *manager,
 647                                                 const gchar               *object_path)
 648 {
 649   RegistrationData *data;
 650   gboolean ret;
 651
 652   g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_SERVER (manager), FALSE);
 653   g_return_val_if_fail (g_variant_is_object_path (object_path), FALSE);
 654   g_return_val_if_fail (g_str_has_prefix (object_path, manager->priv->object_path_ending_in_slash), FALSE);
 655
 656   ret = FALSE;
 657
 658   data = g_hash_table_lookup (manager->priv->map_object_path_to_data, object_path);
 659   if (data != NULL)
 660     {
 661       GPtrArray *interface_names;
 662       GHashTableIter iter;
 663       const gchar *iface_name;
 664
 665       interface_names = g_ptr_array_new ();
 666       g_hash_table_iter_init (&iter, data->map_iface_name_to_iface);
 667       while (g_hash_table_iter_next (&iter, (gpointer) &iface_name, NULL))
 668         g_ptr_array_add (interface_names, (gpointer) iface_name);
 669       g_ptr_array_add (interface_names, NULL);
 670       /* now emit InterfacesRemoved() for all the interfaces */
 671       g_dbus_object_manager_server_emit_interfaces_removed (manager, data, (const gchar *const *) interface_names->pdata);
 672       g_ptr_array_unref (interface_names);
 673
 674       g_hash_table_remove (manager->priv->map_object_path_to_data, object_path);
 675       ret = TRUE;
 676     }
 677
 678   return ret;
 679 }
 680
 681 /**
 682  * g_dbus_object_manager_server_unexport:
 683  * @manager: A #GDBusObjectManagerServer.
 684  * @object_path: An object path.
 685  *
 686  * If @manager has an object at @path, removes the object. Otherwise
 687  * does nothing.
 688  *
 689  * Note that @object_path must be in the hierarchy rooted by the
 690  * object path for @manager.
 691  *
 692  * Returns: %TRUE if object at @object_path was removed, %FALSE otherwise.
 693  *
 694  * Since: 2.30
 695  */
 696 gboolean
 697 g_dbus_object_manager_server_unexport (GDBusObjectManagerServer  *manager,
 698                                        const gchar         *object_path)
 699 {
 700   gboolean ret;
 701   g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_SERVER (manager), FALSE);
 702   g_mutex_lock (&manager->priv->lock);
 703   ret = g_dbus_object_manager_server_unexport_unlocked (manager, object_path);
 704   g_mutex_unlock (&manager->priv->lock);
 705   return ret;
 706 }
 707
 708
 709 /* ---------------------------------------------------------------------------------------------------- */
 710
 711 static const GDBusArgInfo manager_interfaces_added_signal_info_arg0 =
 712 {
 713   -1,
 714   "object_path",
 715   "o",
 716   (GDBusAnnotationInfo**) NULL,
 717 };
 718
 719 static const GDBusArgInfo manager_interfaces_added_signal_info_arg1 =
 720 {
 721   -1,
 722   "interfaces_and_properties",
 723   "a{sa{sv}}",
 724   (GDBusAnnotationInfo**) NULL,
 725 };
 726
 727 static const GDBusArgInfo * const manager_interfaces_added_signal_info_arg_pointers[] =
 728 {
 729   &manager_interfaces_added_signal_info_arg0,
 730   &manager_interfaces_added_signal_info_arg1,
 731   NULL
 732 };
 733
 734 static const GDBusSignalInfo manager_interfaces_added_signal_info =
 735 {
 736   -1,
 737   "InterfacesAdded",
 738   (GDBusArgInfo**) &manager_interfaces_added_signal_info_arg_pointers,
 739   (GDBusAnnotationInfo**) NULL
 740 };
 741
 742 /* ---------- */
 743
 744 static const GDBusArgInfo manager_interfaces_removed_signal_info_arg0 =
 745 {
 746   -1,
 747   "object_path",
 748   "o",
 749   (GDBusAnnotationInfo**) NULL,
 750 };
 751
 752 static const GDBusArgInfo manager_interfaces_removed_signal_info_arg1 =
 753 {
 754   -1,
 755   "interfaces",
 756   "as",
 757   (GDBusAnnotationInfo**) NULL,
 758 };
 759
 760 static const GDBusArgInfo * const manager_interfaces_removed_signal_info_arg_pointers[] =
 761 {
 762   &manager_interfaces_removed_signal_info_arg0,
 763   &manager_interfaces_removed_signal_info_arg1,
 764   NULL
 765 };
 766
 767 static const GDBusSignalInfo manager_interfaces_removed_signal_info =
 768 {
 769   -1,
 770   "InterfacesRemoved",
 771   (GDBusArgInfo**) &manager_interfaces_removed_signal_info_arg_pointers,
 772   (GDBusAnnotationInfo**) NULL
 773 };
 774
 775 /* ---------- */
 776
 777 static const GDBusSignalInfo * const manager_signal_info_pointers[] =
 778 {
 779   &manager_interfaces_added_signal_info,
 780   &manager_interfaces_removed_signal_info,
 781   NULL
 782 };
 783
 784 /* ---------- */
 785
 786 static const GDBusArgInfo manager_get_all_method_info_out_arg0 =
 787 {
 788   -1,
 789   "object_paths_interfaces_and_properties",
 790   "a{oa{sa{sv}}}",
 791   (GDBusAnnotationInfo**) NULL,
 792 };
 793
 794 static const GDBusArgInfo * const manager_get_all_method_info_out_arg_pointers[] =
 795 {
 796   &manager_get_all_method_info_out_arg0,
 797   NULL
 798 };
 799
 800 static const GDBusMethodInfo manager_get_all_method_info =
 801 {
 802   -1,
 803   "GetManagedObjects",
 804   (GDBusArgInfo**) NULL,
 805   (GDBusArgInfo**) &manager_get_all_method_info_out_arg_pointers,
 806   (GDBusAnnotationInfo**) NULL
 807 };
 808
 809 static const GDBusMethodInfo * const manager_method_info_pointers[] =
 810 {
 811   &manager_get_all_method_info,
 812   NULL
 813 };
 814
 815 /* ---------- */
 816
 817 static const GDBusInterfaceInfo manager_interface_info =
 818 {
 819   -1,
 820   "org.freedesktop.DBus.ObjectManager",
 821   (GDBusMethodInfo **) manager_method_info_pointers,
 822   (GDBusSignalInfo **) manager_signal_info_pointers,
 823   (GDBusPropertyInfo **) NULL,
 824   (GDBusAnnotationInfo **) NULL
 825 };
 826
 827 static void
 828 manager_method_call (GDBusConnection       *connection,
 829                      const gchar           *sender,
 830                      const gchar           *object_path,
 831                      const gchar           *interface_name,
 832                      const gchar           *method_name,
 833                      GVariant              *parameters,
 834                      GDBusMethodInvocation *invocation,
 835                      gpointer               user_data)
 836 {
 837   GDBusObjectManagerServer *manager = G_DBUS_OBJECT_MANAGER_SERVER (user_data);
 838   GVariantBuilder array_builder;
 839   GHashTableIter object_iter;
 840   RegistrationData *data;
 841
 842   g_mutex_lock (&manager->priv->lock);
 843
 844   if (g_strcmp0 (method_name, "GetManagedObjects") == 0)
 845     {
 846       g_variant_builder_init (&array_builder, G_VARIANT_TYPE ("a{oa{sa{sv}}}"));
 847       g_hash_table_iter_init (&object_iter, manager->priv->map_object_path_to_data);
 848       while (g_hash_table_iter_next (&object_iter, NULL, (gpointer) &data))
 849         {
 850           GVariantBuilder interfaces_builder;
 851           GHashTableIter interface_iter;
 852           GDBusInterfaceSkeleton *iface;
 853           const gchar *iter_object_path;
 854
 855           g_variant_builder_init (&interfaces_builder, G_VARIANT_TYPE ("a{sa{sv}}"));
 856           g_hash_table_iter_init (&interface_iter, data->map_iface_name_to_iface);
 857           while (g_hash_table_iter_next (&interface_iter, NULL, (gpointer) &iface))
 858             {
 859               GVariant *properties = g_dbus_interface_skeleton_get_properties (iface);
 860               g_variant_builder_add (&interfaces_builder, "{s@a{sv}}",
 861                                      g_dbus_interface_skeleton_get_info (iface)->name,
 862                                      properties);
 863               g_variant_unref (properties);
 864             }
 865           iter_object_path = g_dbus_object_get_object_path (G_DBUS_OBJECT (data->object));
 866           g_variant_builder_add (&array_builder,
 867                                  "{oa{sa{sv}}}",
 868                                  iter_object_path,
 869                                  &interfaces_builder);
 870         }
 871
 872       g_dbus_method_invocation_return_value (invocation,
 873                                              g_variant_new ("(a{oa{sa{sv}}})",
 874                                                             &array_builder));
 875     }
 876   else
 877     {
 878       g_dbus_method_invocation_return_error (invocation,
 879                                              G_DBUS_ERROR,
 880                                              G_DBUS_ERROR_UNKNOWN_METHOD,
 881                                              "Unknown method %s - only GetManagedObjects() is supported",
 882                                              method_name);
 883     }
 884   g_mutex_unlock (&manager->priv->lock);
 885 }
 886
 887 static const GDBusInterfaceVTable manager_interface_vtable =
 888 {
 889   manager_method_call, /* handle_method_call */
 890   NULL, /* get_property */
 891   NULL  /* set_property */
 892 };
 893
 894 /* ---------------------------------------------------------------------------------------------------- */
 895
 896 static void
 897 g_dbus_object_manager_server_constructed (GObject *object)
 898 {
 899   GDBusObjectManagerServer *manager = G_DBUS_OBJECT_MANAGER_SERVER (object);
 900
 901   if (manager->priv->connection != NULL)
 902     export_all (manager);
 903
 904   if (G_OBJECT_CLASS (g_dbus_object_manager_server_parent_class)->constructed != NULL)
 905     G_OBJECT_CLASS (g_dbus_object_manager_server_parent_class)->constructed (object);
 906 }
 907
 908 static void
 909 g_dbus_object_manager_server_emit_interfaces_added (GDBusObjectManagerServer *manager,
 910                                                     RegistrationData   *data,
 911                                                     const gchar *const *interfaces,
 912                                                     const gchar *object_path)
 913 {
 914   GVariantBuilder array_builder;
 915   GError *error;
 916   guint n;
 917
 918   if (data->manager->priv->connection == NULL)
 919     goto out;
 920
 921   g_variant_builder_init (&array_builder, G_VARIANT_TYPE ("a{sa{sv}}"));
 922   for (n = 0; interfaces[n] != NULL; n++)
 923     {
 924       GDBusInterfaceSkeleton *iface;
 925       GVariant *properties;
 926
 927       iface = g_hash_table_lookup (data->map_iface_name_to_iface, interfaces[n]);
 928       g_assert (iface != NULL);
 929       properties = g_dbus_interface_skeleton_get_properties (iface);
 930       g_variant_builder_add (&array_builder, "{s@a{sv}}", interfaces[n], properties);
 931       g_variant_unref (properties);
 932     }
 933
 934   error = NULL;
 935   g_dbus_connection_emit_signal (data->manager->priv->connection,
 936                                  NULL, /* destination_bus_name */
 937                                  manager->priv->object_path,
 938                                  manager_interface_info.name,
 939                                  "InterfacesAdded",
 940                                  g_variant_new ("(oa{sa{sv}})",
 941                                                 object_path,
 942                                                 &array_builder),
 943                                  &error);
 944   if (error)
 945     {
 946       if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CLOSED))
 947         g_warning ("Couldn't emit InterfacesAdded signal: %s", error->message);
 948       g_error_free (error);
 949     }
 950  out:
 951   ;
 952 }
 953
 954 static void
 955 g_dbus_object_manager_server_emit_interfaces_removed (GDBusObjectManagerServer *manager,
 956                                                       RegistrationData   *data,
 957                                                       const gchar *const *interfaces)
 958 {
 959   GVariantBuilder array_builder;
 960   GError *error;
 961   guint n;
 962   const gchar *object_path;
 963
 964   if (data->manager->priv->connection == NULL)
 965     goto out;
 966
 967   g_variant_builder_init (&array_builder, G_VARIANT_TYPE ("as"));
 968   for (n = 0; interfaces[n] != NULL; n++)
 969     g_variant_builder_add (&array_builder, "s", interfaces[n]);
 970
 971   error = NULL;
 972   object_path = g_dbus_object_get_object_path (G_DBUS_OBJECT (data->object));
 973   g_dbus_connection_emit_signal (data->manager->priv->connection,
 974                                  NULL, /* destination_bus_name */
 975                                  manager->priv->object_path,
 976                                  manager_interface_info.name,
 977                                  "InterfacesRemoved",
 978                                  g_variant_new ("(oas)",
 979                                                 object_path,
 980                                                 &array_builder),
 981                                  &error);
 982   if (error)
 983     {
 984       if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CLOSED))
 985         g_warning ("Couldn't emit InterfacesRemoved signal: %s", error->message);
 986       g_error_free (error);
 987     }
 988  out:
 989   ;
 990 }
 991
 992 /* ---------------------------------------------------------------------------------------------------- */
 993
 994 static GList *
 995 g_dbus_object_manager_server_get_objects (GDBusObjectManager  *_manager)
 996 {
 997   GDBusObjectManagerServer *manager = G_DBUS_OBJECT_MANAGER_SERVER (_manager);
 998   GList *ret;
 999   GHashTableIter iter;
1000   RegistrationData *data;
1001
1002   g_mutex_lock (&manager->priv->lock);
1003
1004   ret = NULL;
1005   g_hash_table_iter_init (&iter, manager->priv->map_object_path_to_data);
1006   while (g_hash_table_iter_next (&iter, NULL, (gpointer) &data))
1007     {
1008       ret = g_list_prepend (ret, g_object_ref (data->object));
1009     }
1010
1011   g_mutex_unlock (&manager->priv->lock);
1012
1013   return ret;
1014 }
1015
1016 static const gchar *
1017 g_dbus_object_manager_server_get_object_path (GDBusObjectManager *_manager)
1018 {
1019   GDBusObjectManagerServer *manager = G_DBUS_OBJECT_MANAGER_SERVER (_manager);
1020   return manager->priv->object_path;
1021 }
1022
1023 static GDBusObject *
1024 g_dbus_object_manager_server_get_object (GDBusObjectManager *_manager,
1025                                          const gchar        *object_path)
1026 {
1027   GDBusObjectManagerServer *manager = G_DBUS_OBJECT_MANAGER_SERVER (_manager);
1028   GDBusObject *ret;
1029   RegistrationData *data;
1030
1031   ret = NULL;
1032
1033   g_mutex_lock (&manager->priv->lock);
1034   data = g_hash_table_lookup (manager->priv->map_object_path_to_data, object_path);
1035   if (data != NULL)
1036     ret = g_object_ref (G_DBUS_OBJECT (data->object));
1037   g_mutex_unlock (&manager->priv->lock);
1038
1039   return ret;
1040 }
1041
1042 static GDBusInterface *
1043 g_dbus_object_manager_server_get_interface  (GDBusObjectManager  *_manager,
1044                                              const gchar         *object_path,
1045                                              const gchar         *interface_name)
1046 {
1047   GDBusInterface *ret;
1048   GDBusObject *object;
1049
1050   ret = NULL;
1051
1052   object = g_dbus_object_manager_get_object (_manager, object_path);
1053   if (object == NULL)
1054     goto out;
1055
1056   ret = g_dbus_object_get_interface (object, interface_name);
1057   g_object_unref (object);
1058
1059  out:
1060   return ret;
1061 }
1062
1063 static void
1064 dbus_object_manager_interface_init (GDBusObjectManagerIface *iface)
1065 {
1066   iface->get_object_path = g_dbus_object_manager_server_get_object_path;
1067   iface->get_objects     = g_dbus_object_manager_server_get_objects;
1068   iface->get_object      = g_dbus_object_manager_server_get_object;
1069   iface->get_interface   = g_dbus_object_manager_server_get_interface;
1070 }
1071
1072 /* ---------------------------------------------------------------------------------------------------- */
1073
1074 static void
1075 export_all (GDBusObjectManagerServer *manager)
1076 {
1077   GHashTableIter iter;
1078   const gchar *object_path;
1079   RegistrationData *data;
1080   GHashTableIter iface_iter;
1081   GDBusInterfaceSkeleton *iface;
1082   GError *error;
1083
1084   g_return_if_fail (manager->priv->connection != NULL);
1085
1086   error = NULL;
1087   g_warn_if_fail (manager->priv->manager_reg_id == 0);
1088   manager->priv->manager_reg_id = g_dbus_connection_register_object (manager->priv->connection,
1089                                                                      manager->priv->object_path,
1090                                                                      (GDBusInterfaceInfo *) &manager_interface_info,
1091                                                                      &manager_interface_vtable,
1092                                                                      manager,
1093                                                                      NULL, /* user_data_free_func */
1094                                                                      &error);
1095   if (manager->priv->manager_reg_id == 0)
1096     {
1097       g_warning ("%s: Error registering manager at %s: %s",
1098                  G_STRLOC,
1099                  manager->priv->object_path,
1100                  error->message);
1101       g_error_free (error);
1102     }
1103
1104   g_hash_table_iter_init (&iter, manager->priv->map_object_path_to_data);
1105   while (g_hash_table_iter_next (&iter, (gpointer) &object_path, (gpointer) &data))
1106     {
1107       g_hash_table_iter_init (&iface_iter, data->map_iface_name_to_iface);
1108       while (g_hash_table_iter_next (&iface_iter, NULL, (gpointer) &iface))
1109         {
1110           g_warn_if_fail (g_dbus_interface_skeleton_get_connection (iface) == NULL);
1111           error = NULL;
1112           if (!g_dbus_interface_skeleton_export (iface,
1113                                                  manager->priv->connection,
1114                                                  object_path,
1115                                                  &error))
1116             {
1117               g_warning ("%s: Error registering object at %s with interface %s: %s",
1118                          G_STRLOC,
1119                          object_path,
1120                          g_dbus_interface_skeleton_get_info (iface)->name,
1121                          error->message);
1122               g_error_free (error);
1123             }
1124         }
1125     }
1126 }
1127
1128 static void
1129 unexport_all (GDBusObjectManagerServer *manager, gboolean only_manager)
1130 {
1131   GHashTableIter iter;
1132   RegistrationData *data;
1133   GHashTableIter iface_iter;
1134   GDBusInterfaceSkeleton *iface;
1135
1136   g_return_if_fail (manager->priv->connection != NULL);
1137
1138   g_warn_if_fail (manager->priv->manager_reg_id > 0);
1139   if (manager->priv->manager_reg_id > 0)
1140     {
1141       g_warn_if_fail (g_dbus_connection_unregister_object (manager->priv->connection,
1142                                                            manager->priv->manager_reg_id));
1143       manager->priv->manager_reg_id = 0;
1144     }
1145   if (only_manager)
1146     goto out;
1147
1148   g_hash_table_iter_init (&iter, manager->priv->map_object_path_to_data);
1149   while (g_hash_table_iter_next (&iter, NULL, (gpointer) &data))
1150     {
1151       g_hash_table_iter_init (&iface_iter, data->map_iface_name_to_iface);
1152       while (g_hash_table_iter_next (&iface_iter, NULL, (gpointer) &iface))
1153         {
1154           g_warn_if_fail (g_dbus_interface_skeleton_get_connection (iface) != NULL);
1155           g_dbus_interface_skeleton_unexport (iface);
1156         }
1157     }
1158  out:
1159   ;
1160 }
1161
1162 /* ---------------------------------------------------------------------------------------------------- */