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dbus-bus.c

00001 /* -*- mode: C; c-file-style: "gnu" -*- */
00002 /* dbus-bus.c  Convenience functions for communicating with the bus.
00003  *
00004  * Copyright (C) 2003  CodeFactory AB
00005  * Copyright (C) 2003  Red Hat, Inc.
00006  *
00007  * Licensed under the Academic Free License version 2.1
00008  * 
00009  * This program is free software; you can redistribute it and/or modify
00010  * it under the terms of the GNU General Public License as published by
00011  * the Free Software Foundation; either version 2 of the License, or
00012  * (at your option) any later version.
00013  *
00014  * This program is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  * 
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022  *
00023  */
00024 
00025 #include "dbus-bus.h"
00026 #include "dbus-protocol.h"
00027 #include "dbus-internals.h"
00028 #include "dbus-message.h"
00029 #include <string.h>
00030 
00061 typedef struct
00062 {
00063   DBusConnection *connection; 
00064   char *base_service; 
00066   unsigned int is_well_known : 1; 
00067 } BusData;
00068 
00071 static dbus_int32_t bus_data_slot = -1;
00072 
00074 #define N_BUS_TYPES 3
00075 
00076 static DBusConnection *bus_connections[N_BUS_TYPES];
00077 static char *bus_connection_addresses[N_BUS_TYPES] = { NULL, NULL, NULL };
00078 
00079 static DBusBusType activation_bus_type = DBUS_BUS_ACTIVATION;
00080 
00081 static dbus_bool_t initialized = FALSE;
00082 
00086 _DBUS_DEFINE_GLOBAL_LOCK (bus);
00087 
00088 static void
00089 addresses_shutdown_func (void *data)
00090 {
00091   int i;
00092 
00093   i = 0;
00094   while (i < N_BUS_TYPES)
00095     {
00096       if (bus_connections[i] != NULL)
00097         _dbus_warn ("dbus_shutdown() called but connections were still live!");
00098       
00099       dbus_free (bus_connection_addresses[i]);
00100       bus_connection_addresses[i] = NULL;
00101       ++i;
00102     }
00103 
00104   activation_bus_type = DBUS_BUS_ACTIVATION;
00105 }
00106 
00107 static dbus_bool_t
00108 get_from_env (char           **connection_p,
00109               const char      *env_var)
00110 {
00111   const char *s;
00112   
00113   _dbus_assert (*connection_p == NULL);
00114   
00115   s = _dbus_getenv (env_var);
00116   if (s == NULL || *s == '\0')
00117     return TRUE; /* successfully didn't use the env var */
00118   else
00119     {
00120       *connection_p = _dbus_strdup (s);
00121       return *connection_p != NULL;
00122     }
00123 }
00124 
00125 static dbus_bool_t
00126 init_connections_unlocked (void)
00127 {
00128   if (!initialized)
00129     {
00130       const char *s;
00131       int i;
00132 
00133       i = 0;
00134       while (i < N_BUS_TYPES)
00135         {
00136           bus_connections[i] = NULL;
00137           ++i;
00138         }
00139 
00140       /* Don't init these twice, we may run this code twice if
00141        * init_connections_unlocked() fails midway through.
00142        * In practice, each block below should contain only one
00143        * "return FALSE" or running through twice may not
00144        * work right.
00145        */
00146       
00147        if (bus_connection_addresses[DBUS_BUS_SYSTEM] == NULL)
00148          {
00149            _dbus_verbose ("Filling in system bus address...\n");
00150            
00151            if (!get_from_env (&bus_connection_addresses[DBUS_BUS_SYSTEM],
00152                               "DBUS_SYSTEM_BUS_ADDRESS"))
00153              return FALSE;
00154          }
00155 
00156                   
00157        if (bus_connection_addresses[DBUS_BUS_SYSTEM] == NULL)
00158          {
00159            /* Use default system bus address if none set in environment */
00160            bus_connection_addresses[DBUS_BUS_SYSTEM] =
00161              _dbus_strdup (DBUS_SYSTEM_BUS_DEFAULT_ADDRESS);
00162            if (bus_connection_addresses[DBUS_BUS_SYSTEM] == NULL)
00163              return FALSE;
00164            
00165            _dbus_verbose ("  used default system bus \"%s\"\n",
00166                           bus_connection_addresses[DBUS_BUS_SYSTEM]);
00167          }
00168        else
00169          _dbus_verbose ("  used env var system bus \"%s\"\n",
00170                         bus_connection_addresses[DBUS_BUS_SYSTEM]);
00171           
00172       if (bus_connection_addresses[DBUS_BUS_SESSION] == NULL)
00173         {
00174           _dbus_verbose ("Filling in session bus address...\n");
00175           
00176           if (!get_from_env (&bus_connection_addresses[DBUS_BUS_SESSION],
00177                              "DBUS_SESSION_BUS_ADDRESS"))
00178             return FALSE;
00179           _dbus_verbose ("  \"%s\"\n", bus_connection_addresses[DBUS_BUS_SESSION] ?
00180                          bus_connection_addresses[DBUS_BUS_SESSION] : "none set");
00181         }
00182 
00183       if (bus_connection_addresses[DBUS_BUS_ACTIVATION] == NULL)
00184         {
00185           _dbus_verbose ("Filling in activation bus address...\n");
00186           
00187           if (!get_from_env (&bus_connection_addresses[DBUS_BUS_ACTIVATION],
00188                              "DBUS_ACTIVATION_ADDRESS"))
00189             return FALSE;
00190           
00191           _dbus_verbose ("  \"%s\"\n", bus_connection_addresses[DBUS_BUS_ACTIVATION] ?
00192                          bus_connection_addresses[DBUS_BUS_ACTIVATION] : "none set");
00193         }
00194 
00195 
00196       if (bus_connection_addresses[DBUS_BUS_ACTIVATION] != NULL)
00197         {
00198           s = _dbus_getenv ("DBUS_ACTIVATION_BUS_TYPE");
00199               
00200           if (s != NULL)
00201             {
00202               _dbus_verbose ("Bus activation type was set to \"%s\"\n", s);
00203                   
00204               if (strcmp (s, "system") == 0)
00205                 activation_bus_type = DBUS_BUS_SYSTEM;
00206               else if (strcmp (s, "session") == 0)
00207                 activation_bus_type = DBUS_BUS_SESSION;
00208             }
00209         }
00210       else
00211         {
00212           /* Default to the session bus instead if available */
00213           if (bus_connection_addresses[DBUS_BUS_SESSION] != NULL)
00214             {
00215               bus_connection_addresses[DBUS_BUS_ACTIVATION] =
00216                 _dbus_strdup (bus_connection_addresses[DBUS_BUS_SESSION]);
00217               if (bus_connection_addresses[DBUS_BUS_ACTIVATION] == NULL)
00218                 return FALSE;
00219             }
00220         }
00221       
00222       /* If we return FALSE we have to be sure that restarting
00223        * the above code will work right
00224        */
00225       
00226       if (!_dbus_setenv ("DBUS_ACTIVATION_ADDRESS", NULL))
00227         return FALSE;
00228 
00229       if (!_dbus_setenv ("DBUS_ACTIVATION_BUS_TYPE", NULL))
00230         return FALSE;
00231       
00232       if (!_dbus_register_shutdown_func (addresses_shutdown_func,
00233                                          NULL))
00234         return FALSE;
00235       
00236       initialized = TRUE;
00237     }
00238 
00239   return initialized;
00240 }
00241 
00242 static void
00243 bus_data_free (void *data)
00244 {
00245   BusData *bd = data;
00246   
00247   if (bd->is_well_known)
00248     {
00249       int i;
00250       _DBUS_LOCK (bus);
00251       /* We may be stored in more than one slot */
00252       i = 0;
00253       while (i < N_BUS_TYPES)
00254         {
00255           if (bus_connections[i] == bd->connection)
00256             bus_connections[i] = NULL;
00257           
00258           ++i;
00259         }
00260       _DBUS_UNLOCK (bus);
00261     }
00262   
00263   dbus_free (bd->base_service);
00264   dbus_free (bd);
00265 
00266   dbus_connection_free_data_slot (&bus_data_slot);
00267 }
00268 
00269 static BusData*
00270 ensure_bus_data (DBusConnection *connection)
00271 {
00272   BusData *bd;
00273 
00274   if (!dbus_connection_allocate_data_slot (&bus_data_slot))
00275     return NULL;
00276 
00277   bd = dbus_connection_get_data (connection, bus_data_slot);
00278   if (bd == NULL)
00279     {      
00280       bd = dbus_new0 (BusData, 1);
00281       if (bd == NULL)
00282         {
00283           dbus_connection_free_data_slot (&bus_data_slot);
00284           return NULL;
00285         }
00286 
00287       bd->connection = connection;
00288       
00289       if (!dbus_connection_set_data (connection, bus_data_slot, bd,
00290                                      bus_data_free))
00291         {
00292           dbus_free (bd);
00293           dbus_connection_free_data_slot (&bus_data_slot);
00294           return NULL;
00295         }
00296 
00297       /* Data slot refcount now held by the BusData */
00298     }
00299   else
00300     {
00301       dbus_connection_free_data_slot (&bus_data_slot);
00302     }
00303 
00304   return bd;
00305 }
00306  /* end of implementation details docs */
00308 
00325 DBusConnection *
00326 dbus_bus_get (DBusBusType  type,
00327               DBusError   *error)
00328 {
00329   const char *address;
00330   DBusConnection *connection;
00331   BusData *bd;
00332   DBusBusType address_type;
00333 
00334   _dbus_return_val_if_fail (type >= 0 && type < N_BUS_TYPES, NULL);
00335   _dbus_return_val_if_error_is_set (error, NULL);
00336 
00337   _DBUS_LOCK (bus);
00338 
00339   if (!init_connections_unlocked ())
00340     {
00341       _DBUS_UNLOCK (bus);
00342       _DBUS_SET_OOM (error);
00343       return NULL;
00344     }
00345 
00346   /* We want to use the activation address even if the
00347    * activating bus is the session or system bus,
00348    * per the spec.
00349    */
00350   address_type = type;
00351   
00352   /* Use the real type of the activation bus for getting its
00353    * connection, but only if the real type's address is available. (If
00354    * the activating bus isn't a well-known bus then
00355    * activation_bus_type == DBUS_BUS_ACTIVATION)
00356    */
00357   if (type == DBUS_BUS_ACTIVATION &&
00358       bus_connection_addresses[activation_bus_type] != NULL)
00359     type = activation_bus_type;
00360   
00361   if (bus_connections[type] != NULL)
00362     {
00363       connection = bus_connections[type];
00364       dbus_connection_ref (connection);
00365       
00366       _DBUS_UNLOCK (bus);
00367       return connection;
00368     }
00369 
00370   address = bus_connection_addresses[address_type];
00371   if (address == NULL)
00372     {
00373       dbus_set_error (error, DBUS_ERROR_FAILED,
00374                       "Unable to determine the address of the message bus");
00375       _DBUS_UNLOCK (bus);
00376       return NULL;
00377     }
00378 
00379   connection = dbus_connection_open (address, error);
00380   
00381   if (!connection)
00382     {
00383       _DBUS_ASSERT_ERROR_IS_SET (error);
00384       _DBUS_UNLOCK (bus);
00385       return NULL;
00386     }
00387 
00388   /* By default we're bound to the lifecycle of
00389    * the message bus.
00390    */
00391   dbus_connection_set_exit_on_disconnect (connection,
00392                                           TRUE);
00393   
00394   if (!dbus_bus_register (connection, error))
00395     {
00396       _DBUS_ASSERT_ERROR_IS_SET (error);
00397       dbus_connection_disconnect (connection);
00398       dbus_connection_unref (connection);
00399 
00400       _DBUS_UNLOCK (bus);
00401       return NULL;
00402     }
00403 
00404   bus_connections[type] = connection;
00405   bd = ensure_bus_data (connection);
00406   _dbus_assert (bd != NULL);
00407 
00408   bd->is_well_known = TRUE;
00409 
00410   _DBUS_UNLOCK (bus);
00411   return connection;
00412 }
00413 
00414 
00428 dbus_bool_t
00429 dbus_bus_register (DBusConnection *connection,
00430                    DBusError      *error)
00431 {
00432   DBusMessage *message, *reply;
00433   char *name;
00434   BusData *bd;
00435   dbus_bool_t retval;
00436 
00437   _dbus_return_val_if_fail (connection != NULL, FALSE);
00438   _dbus_return_val_if_error_is_set (error, FALSE);
00439 
00440   retval = FALSE;
00441   
00442   bd = ensure_bus_data (connection);
00443   if (bd == NULL)
00444     {
00445       _DBUS_SET_OOM (error);
00446       return FALSE;
00447     }
00448 
00449   if (bd->base_service != NULL)
00450     {
00451       _dbus_warn ("Attempt to register the same DBusConnection with the message bus, but it is already registered\n");
00452       /* This isn't an error, it's a programming bug. We'll be nice
00453        * and not _dbus_assert_not_reached()
00454        */
00455       return TRUE;
00456     }
00457   
00458   message = dbus_message_new_method_call (DBUS_SERVICE_ORG_FREEDESKTOP_DBUS,
00459                                           DBUS_PATH_ORG_FREEDESKTOP_DBUS,
00460                                           DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
00461                                           "Hello"); 
00462 
00463   if (!message)
00464     {
00465       _DBUS_SET_OOM (error);
00466       return FALSE;
00467     }
00468   
00469   reply = dbus_connection_send_with_reply_and_block (connection, message, -1, error);
00470 
00471   dbus_message_unref (message);
00472   
00473   if (reply == NULL)
00474     goto out;
00475   else if (dbus_set_error_from_message (error, reply))
00476     goto out;
00477   else if (!dbus_message_get_args (reply, error,
00478                                    DBUS_TYPE_STRING, &name,
00479                                    DBUS_TYPE_INVALID))
00480     goto out;
00481   
00482   bd->base_service = name;
00483 
00484   retval = TRUE;
00485   
00486  out:
00487   if (reply)
00488     dbus_message_unref (reply);
00489 
00490   if (!retval)
00491     _DBUS_ASSERT_ERROR_IS_SET (error);
00492   
00493   return retval;
00494 }
00495 
00496 
00508 dbus_bool_t
00509 dbus_bus_set_base_service (DBusConnection *connection,
00510                            const char     *base_service)
00511 {
00512   BusData *bd;
00513 
00514   _dbus_return_val_if_fail (connection != NULL, FALSE);
00515   _dbus_return_val_if_fail (base_service != NULL, FALSE);
00516   
00517   bd = ensure_bus_data (connection);
00518   if (bd == NULL)
00519     return FALSE;
00520 
00521   _dbus_assert (bd->base_service == NULL);
00522   
00523   bd->base_service = _dbus_strdup (base_service);
00524   return bd->base_service != NULL;
00525 }
00526 
00535 const char*
00536 dbus_bus_get_base_service (DBusConnection *connection)
00537 {
00538   BusData *bd;
00539 
00540   _dbus_return_val_if_fail (connection != NULL, NULL);
00541   
00542   bd = ensure_bus_data (connection);
00543   if (bd == NULL)
00544     return NULL;
00545   
00546   return bd->base_service;
00547 }
00548 
00557 unsigned long
00558 dbus_bus_get_unix_user (DBusConnection *connection,
00559                         const char     *service,
00560                         DBusError      *error)
00561 {
00562   DBusMessage *message, *reply;
00563   dbus_uint32_t uid;
00564 
00565   _dbus_return_val_if_fail (connection != NULL, DBUS_UID_UNSET);
00566   _dbus_return_val_if_fail (service != NULL, DBUS_UID_UNSET);
00567   _dbus_return_val_if_error_is_set (error, DBUS_UID_UNSET);
00568   
00569   message = dbus_message_new_method_call (DBUS_SERVICE_ORG_FREEDESKTOP_DBUS,
00570                                           DBUS_PATH_ORG_FREEDESKTOP_DBUS,
00571                                           DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
00572                                           "GetConnectionUnixUser");
00573 
00574   if (message == NULL)
00575     {
00576       _DBUS_SET_OOM (error);
00577       return DBUS_UID_UNSET;
00578     }
00579  
00580   if (!dbus_message_append_args (message,
00581                                  DBUS_TYPE_STRING, service,
00582                                  DBUS_TYPE_INVALID))
00583     {
00584       dbus_message_unref (message);
00585       _DBUS_SET_OOM (error);
00586       return DBUS_UID_UNSET;
00587     }
00588   
00589   reply = dbus_connection_send_with_reply_and_block (connection, message, -1,
00590                                                      error);
00591   
00592   dbus_message_unref (message);
00593   
00594   if (reply == NULL)
00595     {
00596       _DBUS_ASSERT_ERROR_IS_SET (error);
00597       return DBUS_UID_UNSET;
00598     }  
00599 
00600   if (dbus_set_error_from_message (error, reply))
00601     {
00602       _DBUS_ASSERT_ERROR_IS_SET (error);
00603       dbus_message_unref (reply);
00604       return DBUS_UID_UNSET;
00605     }
00606   
00607   if (!dbus_message_get_args (reply, error,
00608                               DBUS_TYPE_UINT32, &uid,
00609                               DBUS_TYPE_INVALID))
00610     {
00611       _DBUS_ASSERT_ERROR_IS_SET (error);
00612       dbus_message_unref (reply);
00613       return DBUS_UID_UNSET;
00614     }
00615 
00616   dbus_message_unref (reply);
00617   
00618   return (unsigned long) uid;
00619 }
00620 
00621 
00637 int
00638 dbus_bus_acquire_service (DBusConnection *connection,
00639                           const char     *service_name,
00640                           unsigned int    flags,
00641                           DBusError      *error)
00642 {
00643   DBusMessage *message, *reply;
00644   dbus_uint32_t service_result;
00645 
00646   _dbus_return_val_if_fail (connection != NULL, 0);
00647   _dbus_return_val_if_fail (service_name != NULL, 0);
00648   _dbus_return_val_if_error_is_set (error, 0);
00649   
00650   message = dbus_message_new_method_call (DBUS_SERVICE_ORG_FREEDESKTOP_DBUS,
00651                                           DBUS_PATH_ORG_FREEDESKTOP_DBUS,
00652                                           DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
00653                                           "AcquireService");
00654 
00655   if (message == NULL)
00656     {
00657       _DBUS_SET_OOM (error);
00658       return -1;
00659     }
00660  
00661   if (!dbus_message_append_args (message,
00662                                  DBUS_TYPE_STRING, service_name,
00663                                  DBUS_TYPE_UINT32, flags,
00664                                  DBUS_TYPE_INVALID))
00665     {
00666       dbus_message_unref (message);
00667       _DBUS_SET_OOM (error);
00668       return -1;
00669     }
00670   
00671   reply = dbus_connection_send_with_reply_and_block (connection, message, -1,
00672                                                      error);
00673   
00674   dbus_message_unref (message);
00675   
00676   if (reply == NULL)
00677     {
00678       _DBUS_ASSERT_ERROR_IS_SET (error);
00679       return -1;
00680     }  
00681 
00682   if (dbus_set_error_from_message (error, reply))
00683     {
00684       _DBUS_ASSERT_ERROR_IS_SET (error);
00685       dbus_message_unref (reply);
00686       return -1;
00687     }
00688   
00689   if (!dbus_message_get_args (reply, error,
00690                               DBUS_TYPE_UINT32, &service_result,
00691                               DBUS_TYPE_INVALID))
00692     {
00693       _DBUS_ASSERT_ERROR_IS_SET (error);
00694       dbus_message_unref (reply);
00695       return -1;
00696     }
00697 
00698   dbus_message_unref (reply);
00699   
00700   return service_result;
00701 }
00702 
00711 dbus_bool_t
00712 dbus_bus_service_exists (DBusConnection *connection,
00713                          const char     *service_name,
00714                          DBusError      *error)
00715 {
00716   DBusMessage *message, *reply;
00717   dbus_bool_t exists;
00718 
00719   _dbus_return_val_if_fail (connection != NULL, FALSE);
00720   _dbus_return_val_if_fail (service_name != NULL, FALSE);
00721   _dbus_return_val_if_error_is_set (error, FALSE);
00722   
00723   message = dbus_message_new_method_call (DBUS_SERVICE_ORG_FREEDESKTOP_DBUS,
00724                                           DBUS_PATH_ORG_FREEDESKTOP_DBUS,
00725                                           DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
00726                                           "ServiceExists");
00727   if (message == NULL)
00728     {
00729       _DBUS_SET_OOM (error);
00730       return FALSE;
00731     }
00732   
00733   if (!dbus_message_append_args (message,
00734                                  DBUS_TYPE_STRING, service_name,
00735                                  DBUS_TYPE_INVALID))
00736     {
00737       dbus_message_unref (message);
00738       _DBUS_SET_OOM (error);
00739       return FALSE;
00740     }
00741   
00742   reply = dbus_connection_send_with_reply_and_block (connection, message, -1, error);
00743   dbus_message_unref (message);
00744 
00745   if (reply == NULL)
00746     {
00747       _DBUS_ASSERT_ERROR_IS_SET (error);
00748       return FALSE;
00749     }
00750 
00751   if (!dbus_message_get_args (reply, error,
00752                               DBUS_TYPE_BOOLEAN, &exists,
00753                               DBUS_TYPE_INVALID))
00754     {
00755       _DBUS_ASSERT_ERROR_IS_SET (error);
00756       dbus_message_unref (reply);
00757       return FALSE;
00758     }
00759   
00760   dbus_message_unref (reply);
00761   return exists;
00762 }
00763 
00779 dbus_bool_t
00780 dbus_bus_activate_service (DBusConnection *connection,
00781                            const char     *service_name,
00782                            dbus_uint32_t   flags,
00783                            dbus_uint32_t  *result,
00784                            DBusError      *error)
00785 {
00786   DBusMessage *msg;
00787   DBusMessage *reply;
00788 
00789   msg = dbus_message_new_method_call (DBUS_SERVICE_ORG_FREEDESKTOP_DBUS,
00790                                       DBUS_PATH_ORG_FREEDESKTOP_DBUS,
00791                                       DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
00792                                       "ActivateService");
00793 
00794   if (!dbus_message_append_args (msg, DBUS_TYPE_STRING, service_name,
00795                                  DBUS_TYPE_UINT32, flags, DBUS_TYPE_INVALID))
00796     {
00797       dbus_message_unref (msg);
00798       _DBUS_SET_OOM (error);
00799       return FALSE;
00800     }
00801 
00802   reply = dbus_connection_send_with_reply_and_block (connection, msg,
00803                                                      -1, error);
00804   dbus_message_unref (msg);
00805 
00806   if (reply == NULL)
00807     {
00808       _DBUS_ASSERT_ERROR_IS_SET (error);
00809       return FALSE;
00810     }
00811 
00812   if (dbus_set_error_from_message (error, reply))
00813     {
00814       _DBUS_ASSERT_ERROR_IS_SET (error);
00815       dbus_message_unref (reply);
00816       return FALSE;
00817     }
00818 
00819   if (result != NULL &&
00820       !dbus_message_get_args (reply, error, DBUS_TYPE_UINT32,
00821                               result, DBUS_TYPE_INVALID))
00822     {
00823       _DBUS_ASSERT_ERROR_IS_SET (error);
00824       dbus_message_unref (reply);
00825       return FALSE;
00826     }
00827   
00828   dbus_message_unref (reply);
00829   return TRUE;
00830 }
00831 
00832 static void
00833 send_no_return_values (DBusConnection *connection,
00834                        DBusMessage    *msg,
00835                        DBusError      *error)
00836 {
00837   if (error)
00838     {
00839       /* Block to check success codepath */
00840       DBusMessage *reply;
00841       
00842       reply = dbus_connection_send_with_reply_and_block (connection, msg,
00843                                                          -1, error);
00844       
00845       if (reply == NULL)
00846         _DBUS_ASSERT_ERROR_IS_SET (error);
00847       else
00848         dbus_message_unref (reply);
00849     }
00850   else
00851     {
00852       /* Silently-fail nonblocking codepath */
00853       dbus_message_set_no_reply (msg, TRUE);
00854       dbus_connection_send (connection, msg, NULL);
00855     }
00856 }
00857 
00880 void
00881 dbus_bus_add_match (DBusConnection *connection,
00882                     const char     *rule,
00883                     DBusError      *error)
00884 {
00885   DBusMessage *msg;
00886 
00887   msg = dbus_message_new_method_call (DBUS_SERVICE_ORG_FREEDESKTOP_DBUS,
00888                                       DBUS_PATH_ORG_FREEDESKTOP_DBUS,
00889                                       DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
00890                                       "AddMatch");
00891 
00892   if (msg == NULL)
00893     {
00894       _DBUS_SET_OOM (error);
00895       return;
00896     }
00897 
00898   if (!dbus_message_append_args (msg, DBUS_TYPE_STRING, rule,
00899                                  DBUS_TYPE_INVALID))
00900     {
00901       dbus_message_unref (msg);
00902       _DBUS_SET_OOM (error);
00903       return;
00904     }
00905 
00906   send_no_return_values (connection, msg, error);
00907 
00908   dbus_message_unref (msg);
00909 }
00910 
00924 void
00925 dbus_bus_remove_match (DBusConnection *connection,
00926                        const char     *rule,
00927                        DBusError      *error)
00928 {
00929   DBusMessage *msg;
00930 
00931   msg = dbus_message_new_method_call (DBUS_SERVICE_ORG_FREEDESKTOP_DBUS,
00932                                       DBUS_PATH_ORG_FREEDESKTOP_DBUS,
00933                                       DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
00934                                       "RemoveMatch");
00935 
00936   if (!dbus_message_append_args (msg, DBUS_TYPE_STRING, rule,
00937                                  DBUS_TYPE_INVALID))
00938     {
00939       dbus_message_unref (msg);
00940       _DBUS_SET_OOM (error);
00941       return;
00942     }
00943 
00944   send_no_return_values (connection, msg, error);
00945 
00946   dbus_message_unref (msg);
00947 }
00948 

Generated on Thu Aug 11 21:11:12 2005 for D-BUS by  doxygen 1.4.0