27 #include "dbus-protocol.h"    28 #include "dbus-internals.h"    29 #include "dbus-message.h"    30 #include "dbus-marshal-validate.h"    31 #include "dbus-misc.h"    32 #include "dbus-threads-internal.h"    33 #include "dbus-connection-internal.h"    34 #include "dbus-string.h"    87 static dbus_int32_t bus_data_slot = -1;
   100 addresses_shutdown_func (
void *data)
   107       if (bus_connections[i] != 
NULL)
   108         _dbus_warn_check_failed (
"dbus_shutdown() called but connections were still live. This probably means the application did not drop all its references to bus connections.\n");
   111       bus_connection_addresses[i] = 
NULL;
   121 get_from_env (
char           **connection_p,
   129   if (s == 
NULL || *s == 
'\0')
   134       return *connection_p != 
NULL;
   139 init_session_address (
void)
   148                      "DBUS_SESSION_BUS_ADDRESS");
   149   if (bus_connection_addresses[DBUS_BUS_SESSION] == 
NULL)
   164       if (supported && retval)
   168       else if (supported && !retval)
   173             _dbus_warn (
"Dynamic session lookup supported but failed silently\n");
   185   if (bus_connection_addresses[DBUS_BUS_SESSION] == 
NULL)
   189   if (bus_connection_addresses[DBUS_BUS_SESSION] == 
NULL)
   196 init_connections_unlocked (
void)
   206           bus_connections[i] = 
NULL;
   219            _dbus_verbose (
"Filling in system bus address...\n");
   222                               "DBUS_SYSTEM_BUS_ADDRESS"))
   236            _dbus_verbose (
"  used default system bus \"%s\"\n",
   240          _dbus_verbose (
"  used env var system bus \"%s\"\n",
   245           _dbus_verbose (
"Filling in session bus address...\n");
   247           if (!init_session_address ())
   256           _dbus_verbose (
"Filling in activation bus address...\n");
   259                              "DBUS_STARTER_ADDRESS"))
   262           _dbus_verbose (
"  \"%s\"\n", bus_connection_addresses[DBUS_BUS_STARTER] ?
   263                          bus_connection_addresses[DBUS_BUS_STARTER] : 
"none set");
   273               _dbus_verbose (
"Bus activation type was set to \"%s\"\n", s);
   275               if (strcmp (s, 
"system") == 0)
   277               else if (strcmp (s, 
"session") == 0)
   308 bus_data_free (
void *data)
   318             "when we attached bus data");
   329             bus_connections[i] = 
NULL;
   406       if (bus_connections[i] == connection)
   408           bus_connections[i] = 
NULL;
   426   _dbus_return_val_if_error_is_set (error, 
NULL);
   432       _DBUS_SET_OOM (error);
   437   if (!init_connections_unlocked ())
   439       _DBUS_SET_OOM (error);
   455       bus_connection_addresses[activation_bus_type] != 
NULL)
   456     type = activation_bus_type;
   458   if (!
private && bus_connections[type] != 
NULL)
   460       connection = bus_connections[type];
   465   address = bus_connection_addresses[address_type];
   469                       "Unable to determine the address of the message bus (try 'man dbus-launch' and 'man dbus-daemon' for help)");
   497       bus_connections[type] = connection;
   509   bd = ensure_bus_data (connection);
   517   if (connection == 
NULL)
   518     _DBUS_ASSERT_ERROR_IS_SET (error);
   561   return internal_bus_get (type, 
FALSE, error);
   593   return internal_bus_get (type, 
TRUE, error);
   654   _dbus_return_val_if_fail (connection != 
NULL, 
FALSE);
   655   _dbus_return_val_if_error_is_set (error, 
FALSE);
   663       _DBUS_SET_OOM (error);
   668   bd = ensure_bus_data (connection);
   671       _DBUS_SET_OOM (error);
   677       _dbus_verbose (
"Ignoring attempt to register the same DBusConnection %s with the message bus a second time.\n",
   691       _DBUS_SET_OOM (error);
   709       _DBUS_SET_OOM (error);
   725     _DBUS_ASSERT_ERROR_IS_SET (error);
   767                           const char     *unique_name)
   772   _dbus_return_val_if_fail (connection != 
NULL, 
FALSE);
   773   _dbus_return_val_if_fail (unique_name != 
NULL, 
FALSE);
   781   bd = ensure_bus_data (connection);
   818   const char *unique_name = 
NULL;
   820   _dbus_return_val_if_fail (connection != 
NULL, 
NULL);
   829   bd = ensure_bus_data (connection);
   874   _dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), 
DBUS_UID_UNSET);
   880                                           "GetConnectionUnixUser");
   884       _DBUS_SET_OOM (error);
   893       _DBUS_SET_OOM (error);
   904       _DBUS_ASSERT_ERROR_IS_SET (error);
   910       _DBUS_ASSERT_ERROR_IS_SET (error);
   919       _DBUS_ASSERT_ERROR_IS_SET (error);
   926   return (
unsigned long) uid;
   953   const char *v_STRING;
   955   _dbus_return_val_if_fail (connection != 
NULL, 
NULL);
   956   _dbus_return_val_if_error_is_set (error, 
NULL);
   965       _DBUS_SET_OOM (error);
   976       _DBUS_ASSERT_ERROR_IS_SET (error);
   982       _DBUS_ASSERT_ERROR_IS_SET (error);
   992       _DBUS_ASSERT_ERROR_IS_SET (error);
  1002     _DBUS_SET_OOM (error);
  1118   dbus_uint32_t result;
  1120   _dbus_return_val_if_fail (connection != 
NULL, 0);
  1121   _dbus_return_val_if_fail (name != 
NULL, 0);
  1122   _dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), 0);
  1123   _dbus_return_val_if_error_is_set (error, 0);
  1130   if (message == 
NULL)
  1132       _DBUS_SET_OOM (error);
  1142       _DBUS_SET_OOM (error);
  1153       _DBUS_ASSERT_ERROR_IS_SET (error);
  1159       _DBUS_ASSERT_ERROR_IS_SET (error);
  1168       _DBUS_ASSERT_ERROR_IS_SET (error);
  1203   dbus_uint32_t result;
  1205   _dbus_return_val_if_fail (connection != 
NULL, 0);
  1206   _dbus_return_val_if_fail (name != 
NULL, 0);
  1207   _dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), 0);
  1208   _dbus_return_val_if_error_is_set (error, 0);
  1215   if (message == 
NULL)
  1217       _DBUS_SET_OOM (error);
  1226       _DBUS_SET_OOM (error);
  1237       _DBUS_ASSERT_ERROR_IS_SET (error);
  1243       _DBUS_ASSERT_ERROR_IS_SET (error);
  1252       _DBUS_ASSERT_ERROR_IS_SET (error);
  1287   _dbus_return_val_if_fail (connection != 
NULL, 
FALSE);
  1288   _dbus_return_val_if_fail (name != 
NULL, 
FALSE);
  1289   _dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), 
FALSE);
  1290   _dbus_return_val_if_error_is_set (error, 
FALSE);
  1296   if (message == 
NULL)
  1298       _DBUS_SET_OOM (error);
  1307       _DBUS_SET_OOM (error);
  1316       _DBUS_ASSERT_ERROR_IS_SET (error);
  1324       _DBUS_ASSERT_ERROR_IS_SET (error);
  1358                                 dbus_uint32_t   flags,
  1359                                 dbus_uint32_t  *result,
  1365   _dbus_return_val_if_fail (connection != 
NULL, 
FALSE);
  1366   _dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), 
FALSE);
  1371                                       "StartServiceByName");
  1377       _DBUS_SET_OOM (error);
  1387       _DBUS_ASSERT_ERROR_IS_SET (error);
  1393       _DBUS_ASSERT_ERROR_IS_SET (error);
  1398   if (result != 
NULL &&
  1402       _DBUS_ASSERT_ERROR_IS_SET (error);
  1425         _DBUS_ASSERT_ERROR_IS_SET (error);
  1532   _dbus_return_if_fail (rule != 
NULL);
  1541       _DBUS_SET_OOM (error);
  1549       _DBUS_SET_OOM (error);
  1553   send_no_return_values (connection, msg, error);
  1582   _dbus_return_if_fail (rule != 
NULL);
  1593       _DBUS_SET_OOM (error);
  1597   send_no_return_values (connection, msg, error);
 const char * message
public error message field 
#define NULL
A null pointer, defined appropriately for C or C++. 
void dbus_message_set_no_reply(DBusMessage *message, dbus_bool_t no_reply)
Sets a flag indicating that the message does not want a reply; if this flag is set, the other end of the connection may (but is not required to) optimize by not sending method return or error replies. 
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0(). 
int dbus_bus_release_name(DBusConnection *connection, const char *name, DBusError *error)
Asks the bus to unassign the given name from this connection by invoking the ReleaseName method on th...
DBusConnection * dbus_connection_ref(DBusConnection *connection)
Increments the reference count of a DBusConnection. 
#define DBUS_TYPE_STRING
Type code marking a UTF-8 encoded, nul-terminated Unicode string. 
#define _dbus_assert(condition)
Aborts with an error message if the condition is false. 
#define DBUS_INTERFACE_DBUS
The interface exported by the object with DBUS_SERVICE_DBUS and DBUS_PATH_DBUS. 
#define DBUS_ERROR_INIT
Expands to a suitable initializer for a DBusError on the stack. 
void _dbus_warn_check_failed(const char *format,...)
Prints a "critical" warning to stderr when an assertion fails; differs from _dbus_warn primarily in t...
dbus_bool_t dbus_connection_set_data(DBusConnection *connection, dbus_int32_t slot, void *data, DBusFreeFunction free_data_func)
Stores a pointer on a DBusConnection, along with an optional function to be used for freeing the data...
#define N_BUS_TYPES
Number of bus types. 
Implementation details of DBusConnection. 
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string. 
Block of message-bus-related data we attach to each DBusConnection used with these convenience functi...
#define DBUS_UID_UNSET
an invalid UID used to represent an uninitialized dbus_uid_t field 
void dbus_connection_free_data_slot(dbus_int32_t *slot_p)
Deallocates a global ID for connection data slots. 
DBusMessage * dbus_connection_send_with_reply_and_block(DBusConnection *connection, DBusMessage *message, int timeout_milliseconds, DBusError *error)
Sends a message and blocks a certain time period while waiting for a reply. 
DBusConnection * dbus_connection_open_private(const char *address, DBusError *error)
Opens a new, dedicated connection to a remote address. 
Internals of DBusMessage. 
int dbus_bus_request_name(DBusConnection *connection, const char *name, unsigned int flags, DBusError *error)
Asks the bus to assign the given name to this connection by invoking the RequestName method on the bu...
#define dbus_new0(type, count)
Safe macro for using dbus_malloc0(). 
DBusConnection * connection
Connection we're associated with. 
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE. 
void dbus_connection_set_exit_on_disconnect(DBusConnection *connection, dbus_bool_t exit_on_disconnect)
Set whether _exit() should be called when the connection receives a disconnect signal. 
#define DBUS_PATH_DBUS
The object path used to talk to the bus itself. 
dbus_bool_t dbus_connection_send(DBusConnection *connection, DBusMessage *message, dbus_uint32_t *serial)
Adds a message to the outgoing message queue. 
DBusConnection * dbus_bus_get(DBusBusType type, DBusError *error)
Connects to a bus daemon and registers the client with it. 
void * dbus_connection_get_data(DBusConnection *connection, dbus_int32_t slot)
Retrieves data previously set with dbus_connection_set_data(). 
dbus_bool_t dbus_bus_set_unique_name(DBusConnection *connection, const char *unique_name)
Sets the unique name of the connection, as assigned by the message bus. 
void _dbus_warn(const char *format,...)
Prints a warning message to stderr. 
char * unique_name
Unique name of this connection. 
dbus_bool_t dbus_connection_allocate_data_slot(dbus_int32_t *slot_p)
Allocates an integer ID to be used for storing application-specific data on any DBusConnection. 
void dbus_bus_remove_match(DBusConnection *connection, const char *rule, DBusError *error)
Removes a previously-added match rule "by value" (the most recently-added identical rule gets removed...
DBusConnection * dbus_connection_open(const char *address, DBusError *error)
Gets a connection to a remote address. 
dbus_bool_t dbus_message_get_args(DBusMessage *message, DBusError *error, int first_arg_type,...)
Gets arguments from a message given a variable argument list. 
Object representing an exception. 
void _dbus_bus_notify_shared_connection_disconnected_unlocked(DBusConnection *connection)
Internal function that checks to see if this is a shared connection owned by the bus and if it is unr...
dbus_bool_t dbus_message_append_args(DBusMessage *message, int first_arg_type,...)
Appends fields to a message given a variable argument list. 
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError. 
#define DBUS_TYPE_UINT32
Type code marking a 32-bit unsigned integer. 
DBusMessage * dbus_message_new_method_call(const char *destination, const char *path, const char *iface, const char *method)
Constructs a new message to invoke a method on a remote object. 
#define _DBUS_UNLOCK(name)
Unlocks a global lock. 
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(). 
#define TRUE
Expands to "1". 
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called. 
dbus_bool_t dbus_bus_register(DBusConnection *connection, DBusError *error)
Registers a connection with the bus. 
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more. 
dbus_bool_t dbus_set_error_from_message(DBusError *error, DBusMessage *message)
Sets a DBusError based on the contents of the given message. 
dbus_bool_t dbus_bus_start_service_by_name(DBusConnection *connection, const char *name, dbus_uint32_t flags, dbus_uint32_t *result, DBusError *error)
Starts a service that will request ownership of the given name. 
#define DBUS_TYPE_INVALID
Type code that is never equal to a legitimate type code. 
unsigned long dbus_bus_get_unix_user(DBusConnection *connection, const char *name, DBusError *error)
Asks the bus to return the UID the named connection authenticated as, if any. 
#define DBUS_TYPE_BOOLEAN
Type code marking a boolean. 
unsigned int is_well_known
Is one of the well-known connections in our global array. 
void _dbus_connection_close_possibly_shared(DBusConnection *connection)
Closes a shared OR private connection, while dbus_connection_close() can only be used on private conn...
The bus that started us, if any. 
dbus_bool_t _dbus_lookup_session_address(dbus_bool_t *supported, DBusString *address, DBusError *error)
Determines the address of the session bus by querying a platform-specific method. ...
void dbus_bus_add_match(DBusConnection *connection, const char *rule, DBusError *error)
Adds a match rule to match messages going through the message bus. 
#define FALSE
Expands to "0". 
const char * dbus_bus_get_unique_name(DBusConnection *connection)
Gets the unique name of the connection as assigned by the message bus. 
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_register_shutdown_func(DBusShutdownFunction function, void *data)
Register a cleanup function to be called exactly once the next time dbus_shutdown() is called...
#define _DBUS_LOCK(name)
Locks a global lock, initializing it first if necessary. 
char * dbus_bus_get_id(DBusConnection *connection, DBusError *error)
Asks the bus to return its globally unique ID, as described in the D-Bus specification. 
dbus_bool_t _dbus_string_steal_data(DBusString *str, char **data_return)
Like _dbus_string_get_data(), but removes the gotten data from the original string. 
void dbus_connection_unref(DBusConnection *connection)
Decrements the reference count of a DBusConnection, and finalizes it if the count reaches zero...
#define DBUS_SERVICE_DBUS
The bus name used to talk to the bus itself. 
char * _dbus_strdup(const char *str)
Duplicates a string. 
const char * _dbus_getenv(const char *varname)
Wrapper for getenv(). 
DBusBusType
Well-known bus types. 
DBusConnection * dbus_bus_get_private(DBusBusType type, DBusError *error)
Connects to a bus daemon and registers the client with it as with dbus_bus_register(). 
void dbus_message_unref(DBusMessage *message)
Decrements the reference count of a DBusMessage, freeing the message if the count reaches 0...
dbus_bool_t dbus_bus_name_has_owner(DBusConnection *connection, const char *name, DBusError *error)
Asks the bus whether a certain name has an owner. 
dbus_bool_t dbus_error_is_set(const DBusError *error)
Checks whether an error occurred (the error is set).