/** Checks if user is at the console
*
* @param username user to check
* @param error return location for errors
* @returns #TRUE is the user is at the consolei and there are no errors
*/
dbus_bool_t
_dbus_user_at_console (const char *username,
DBusError *error)
{
DBusString f;
dbus_bool_t result;
result = FALSE;
if (!_dbus_string_init (&f))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_append (&f, DBUS_CONSOLE_AUTH_DIR))
{
_DBUS_SET_OOM (error);
goto out;
}
if (!_dbus_string_append (&f, username))
{
_DBUS_SET_OOM (error);
goto out;
}
result = _dbus_file_exists (_dbus_string_get_const_data (&f));
out:
_dbus_string_free (&f);
return result;
}
static dbus_bool_t
_dbus_create_uuid_file_exclusively (const DBusString *filename,
DBusGUID *uuid,
DBusError *error)
{
DBusString encoded;
if (!_dbus_string_init (&encoded))
{
_DBUS_SET_OOM (error);
return FALSE;
}
_dbus_generate_uuid (uuid);
if (!_dbus_uuid_encode (uuid, &encoded))
{
_DBUS_SET_OOM (error);
goto error;
}
/* FIXME this is racy; we need a save_file_exclusively
* function. But in practice this should be fine for now.
*
* - first be sure we can create the file and it
* doesn't exist by creating it empty with O_EXCL
* - then create it by creating a temporary file and
* overwriting atomically with rename()
*/
if (!_dbus_create_file_exclusively (filename, error))
goto error;
if (!_dbus_string_append_byte (&encoded, '\n'))
{
_DBUS_SET_OOM (error);
goto error;
}
if (!_dbus_string_save_to_file (&encoded, filename, error))
goto error;
if (!_dbus_make_file_world_readable (filename, error))
goto error;
_dbus_string_free (&encoded);
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return TRUE;
error:
_DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_string_free (&encoded);
return FALSE;
}
/**
* Checks whether a certain name has an owner.
*
* @param connection the connection
* @param name the name
* @param error location to store any errors
* @returns #TRUE if the name exists, #FALSE if not or on error
*/
dbus_bool_t
dbus_bus_name_has_owner (DBusConnection *connection,
const char *name,
DBusError *error)
{
DBusMessage *message, *reply;
dbus_bool_t exists;
_dbus_return_val_if_fail (connection != NULL, FALSE);
_dbus_return_val_if_fail (name != NULL, FALSE);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), FALSE);
_dbus_return_val_if_error_is_set (error, FALSE);
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"NameHasOwner");
if (message == NULL)
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
{
dbus_message_unref (message);
_DBUS_SET_OOM (error);
return FALSE;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1, error);
dbus_message_unref (message);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return FALSE;
}
if (!dbus_message_get_args (reply, error,
DBUS_TYPE_BOOLEAN, &exists,
DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return FALSE;
}
dbus_message_unref (reply);
return exists;
}
/**
* Removes a previously-added match rule "by value" (the most
* recently-added identical rule gets removed). The "rule" argument
* is the string form of a match rule.
*
* If you pass #NULL for the error, this function will not
* block; otherwise it will. See detailed explanation in
* docs for dbus_bus_add_match().
*
* @param connection connection to the message bus
* @param rule textual form of match rule
* @param error location to store any errors
*/
void
dbus_bus_remove_match (DBusConnection *connection,
const char *rule,
DBusError *error)
{
DBusMessage *msg;
_dbus_return_if_fail (rule != NULL);
msg = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"RemoveMatch");
if (!dbus_message_append_args (msg, DBUS_TYPE_STRING, &rule,
DBUS_TYPE_INVALID))
{
dbus_message_unref (msg);
_DBUS_SET_OOM (error);
return;
}
send_no_return_values (connection, msg, error);
dbus_message_unref (msg);
}
/**
* Starts a service that will request ownership of the given name.
* The returned result will be one of be one of
* #DBUS_START_REPLY_SUCCESS or #DBUS_START_REPLY_ALREADY_RUNNING if
* successful. Pass #NULL if you don't care about the result.
*
* The flags parameter is for future expansion, currently you should
* specify 0.
*
* @param connection the connection
* @param name the name we want the new service to request
* @param flags the flags (should always be 0 for now)
* @param result a place to store the result or #NULL
* @param error location to store any errors
* @returns #TRUE if the activation succeeded, #FALSE if not
*/
dbus_bool_t
dbus_bus_start_service_by_name (DBusConnection *connection,
const char *name,
dbus_uint32_t flags,
dbus_uint32_t *result,
DBusError *error)
{
DBusMessage *msg;
DBusMessage *reply;
_dbus_return_val_if_fail (connection != NULL, FALSE);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), FALSE);
msg = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"StartServiceByName");
if (!dbus_message_append_args (msg, DBUS_TYPE_STRING, &name,
DBUS_TYPE_UINT32, &flags, DBUS_TYPE_INVALID))
{
dbus_message_unref (msg);
_DBUS_SET_OOM (error);
return FALSE;
}
reply = dbus_connection_send_with_reply_and_block (connection, msg,
-1, error);
dbus_message_unref (msg);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return FALSE;
}
if (dbus_set_error_from_message (error, reply))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return FALSE;
}
if (result != NULL &&
!dbus_message_get_args (reply, error, DBUS_TYPE_UINT32,
result, DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return FALSE;
}
dbus_message_unref (reply);
return TRUE;
}
/**
* Write the give UUID to a file.
*
* @param filename the file to write
* @param uuid the UUID to save
* @param error used to raise an error
* @returns #FALSE on error
*/
dbus_bool_t
_dbus_write_uuid_file (const DBusString *filename,
const DBusGUID *uuid,
DBusError *error)
{
DBusString encoded;
if (!_dbus_string_init (&encoded))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_uuid_encode (uuid, &encoded))
{
_DBUS_SET_OOM (error);
goto error;
}
if (!_dbus_string_append_byte (&encoded, '\n'))
{
_DBUS_SET_OOM (error);
goto error;
}
if (!_dbus_string_save_to_file (&encoded, filename, TRUE, error))
goto error;
_dbus_string_free (&encoded);
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return TRUE;
error:
_DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_string_free (&encoded);
return FALSE;
}
static dbus_bool_t
delimit_token (DBusString *token,
DBusList **retval,
DBusError *error)
{
char *str;
str = _dbus_strdup (_dbus_string_get_data (token));
if (!str)
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_list_append (retval, str))
{
dbus_free (str);
_DBUS_SET_OOM (error);
return FALSE;
}
return TRUE;
}
static void
xml_text_reader_error (void *arg, xmlErrorPtr xml_error)
{
DBusError *error = arg;
#if 0
_dbus_verbose ("XML_ERROR level=%d, domain=%d, code=%d, msg=%s\n",
xml_error->level, xml_error->domain,
xml_error->code, xml_error->message);
#endif
if (!dbus_error_is_set (error))
{
if (xml_error->code == XML_ERR_NO_MEMORY)
_DBUS_SET_OOM (error);
else if (xml_error->level == XML_ERR_ERROR ||
xml_error->level == XML_ERR_FATAL)
dbus_set_error (error, DBUS_ERROR_FAILED,
"Error loading config file: '%s'",
xml_error->message);
}
}
DBusConnection *
test_try_connect_to_bus (TestMainContext *ctx,
const gchar *address,
GError **gerror)
{
DBusConnection *conn;
DBusError error = DBUS_ERROR_INIT;
conn = dbus_connection_open_private (address, &error);
if (conn == NULL)
goto fail;
if (!dbus_bus_register (conn, &error))
goto fail;
g_assert (dbus_bus_get_unique_name (conn) != NULL);
if (ctx != NULL && !test_connection_try_setup (ctx, conn))
{
_DBUS_SET_OOM (&error);
goto fail;
}
return conn;
fail:
if (gerror != NULL)
*gerror = g_dbus_error_new_for_dbus_error (error.name, error.message);
if (conn != NULL)
{
dbus_connection_close (conn);
dbus_connection_unref (conn);
}
dbus_error_free (&error);
return FALSE;
}
/**
* Fills n_bytes of the given buffer with random bytes.
*
* @param buffer an allocated buffer
* @param n_bytes the number of bytes in buffer to write to
* @param error location to store reason for failure
* @returns #TRUE on success
*/
dbus_bool_t
_dbus_generate_random_bytes_buffer (char *buffer,
int n_bytes,
DBusError *error)
{
DBusString str;
if (!_dbus_string_init (&str))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_generate_random_bytes (&str, n_bytes, error))
{
_dbus_string_free (&str);
return FALSE;
}
_dbus_string_copy_to_buffer (&str, buffer, n_bytes);
_dbus_string_free (&str);
return TRUE;
}
/**
* Try to open a new transport for the given address entry. (This
* opens a client-side-of-the-connection transport.)
*
* @param entry the address entry
* @param error location to store reason for failure.
* @returns new transport of #NULL on failure.
*/
DBusTransport*
_dbus_transport_open (DBusAddressEntry *entry,
DBusError *error)
{
DBusTransport *transport;
const char *address_problem_type;
const char *address_problem_field;
const char *address_problem_other;
const char *method;
const char *expected_guid_orig;
char *expected_guid;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
transport = NULL;
address_problem_type = NULL;
address_problem_field = NULL;
address_problem_other = NULL;
expected_guid_orig = dbus_address_entry_get_value (entry, "guid");
expected_guid = _dbus_strdup (expected_guid_orig);
if (expected_guid_orig != NULL && expected_guid == NULL)
{
_DBUS_SET_OOM (error);
return NULL;
}
method = dbus_address_entry_get_method (entry);
_dbus_assert (method != NULL);
if (strcmp (method, "unix") == 0)
{
const char *path = dbus_address_entry_get_value (entry, "path");
const char *tmpdir = dbus_address_entry_get_value (entry, "tmpdir");
const char *abstract = dbus_address_entry_get_value (entry, "abstract");
if (tmpdir != NULL)
{
address_problem_other = "cannot use the \"tmpdir\" option for an address to connect to, only in an address to listen on";
goto bad_address;
}
if (path == NULL && abstract == NULL)
{
address_problem_type = "unix";
address_problem_field = "path or abstract";
goto bad_address;
}
if (path != NULL && abstract != NULL)
{
address_problem_other = "can't specify both \"path\" and \"abstract\" options in an address";
goto bad_address;
}
if (path)
transport = _dbus_transport_new_for_domain_socket (path, FALSE,
error);
else
transport = _dbus_transport_new_for_domain_socket (abstract, TRUE,
error);
}
else if (strcmp (method, "tcp") == 0)
{
const char *host = dbus_address_entry_get_value (entry, "host");
const char *port = dbus_address_entry_get_value (entry, "port");
DBusString str;
long lport;
dbus_bool_t sresult;
if (port == NULL)
{
address_problem_type = "tcp";
address_problem_field = "port";
goto bad_address;
}
_dbus_string_init_const (&str, port);
sresult = _dbus_string_parse_int (&str, 0, &lport, NULL);
_dbus_string_free (&str);
if (sresult == FALSE || lport <= 0 || lport > 65535)
{
address_problem_other = "Port is not an integer between 0 and 65535";
goto bad_address;
}
transport = _dbus_transport_new_for_tcp_socket (host, lport, error);
}
#ifdef DBUS_BUILD_TESTS
else if (strcmp (method, "debug-pipe") == 0)
{
const char *name = dbus_address_entry_get_value (entry, "name");
if (name == NULL)
{
address_problem_type = "debug-pipe";
address_problem_field = "name";
goto bad_address;
}
transport = _dbus_transport_debug_pipe_new (name, error);
}
#endif
else
{
address_problem_other = "Unknown address type (examples of valid types are \"unix\" and \"tcp\")";
goto bad_address;
}
if (transport == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_free (expected_guid);
}
else
{
transport->expected_guid = expected_guid;
}
return transport;
bad_address:
dbus_free (expected_guid);
if (address_problem_type != NULL)
dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
"Address of type %s was missing argument %s",
address_problem_type, address_problem_field);
else
dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
"Could not parse address: %s",
address_problem_other);
return NULL;
}
/**
* Try to open a new transport for the given address entry. (This
* opens a client-side-of-the-connection transport.)
*
* @param entry the address entry
* @param error location to store reason for failure.
* @returns new transport of #NULL on failure.
*/
DBusTransport*
_dbus_transport_open (DBusAddressEntry *entry,
DBusError *error)
{
DBusTransport *transport;
const char *expected_guid_orig;
char *expected_guid;
int i;
DBusError tmp_error = DBUS_ERROR_INIT;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
transport = NULL;
expected_guid_orig = dbus_address_entry_get_value (entry, "guid");
expected_guid = _dbus_strdup (expected_guid_orig);
if (expected_guid_orig != NULL && expected_guid == NULL)
{
_DBUS_SET_OOM (error);
return NULL;
}
for (i = 0; i < (int) _DBUS_N_ELEMENTS (open_funcs); ++i)
{
DBusTransportOpenResult result;
_DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
result = (* open_funcs[i].func) (entry, &transport, &tmp_error);
switch (result)
{
case DBUS_TRANSPORT_OPEN_OK:
_DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
goto out;
break;
case DBUS_TRANSPORT_OPEN_NOT_HANDLED:
_DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
/* keep going through the loop of open funcs */
break;
case DBUS_TRANSPORT_OPEN_BAD_ADDRESS:
_DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
goto out;
break;
case DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT:
_DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
goto out;
break;
}
}
out:
if (transport == NULL)
{
if (!dbus_error_is_set (&tmp_error))
_dbus_set_bad_address (&tmp_error,
NULL, NULL,
"Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")");
_DBUS_ASSERT_ERROR_IS_SET (&tmp_error);
dbus_move_error(&tmp_error, error);
dbus_free (expected_guid);
}
else
{
_DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error);
/* In the case of autostart the initial guid is NULL
* and the autostart transport recursively calls
* _dbus_open_transport wich returns a transport
* with a guid. That guid is the definitive one.
*
* FIXME: if more transports are added they may have
* an effect on the expected_guid semantics (i.e.
* expected_guid and transport->expected_guid may
* both have values). This is very unlikely though
* we should either throw asserts here for those
* corner cases or refactor the code so it is
* clearer on what is expected and what is not
*/
if(expected_guid)
transport->expected_guid = expected_guid;
}
return transport;
}
BusConfigParser*
bus_config_load (const DBusString *file,
dbus_bool_t is_toplevel,
const BusConfigParser *parent,
DBusError *error)
{
xmlTextReader *reader;
BusConfigParser *parser;
DBusString dirname, data;
DBusError tmp_error;
int ret;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
parser = NULL;
reader = NULL;
if (!_dbus_string_init (&dirname))
{
_DBUS_SET_OOM (error);
return NULL;
}
if (!_dbus_string_init (&data))
{
_DBUS_SET_OOM (error);
_dbus_string_free (&dirname);
return NULL;
}
if (is_toplevel)
{
/* xmlMemSetup only fails if one of the functions is NULL */
/*
xmlMemSetup (dbus_free,
dbus_malloc,
dbus_realloc,
_dbus_strdup);
*/
xmlInitParser ();
xmlSetGenericErrorFunc (NULL, xml_shut_up);
}
if (!_dbus_string_get_dirname (file, &dirname))
{
_DBUS_SET_OOM (error);
goto failed;
}
parser = bus_config_parser_new (&dirname, is_toplevel, parent);
if (parser == NULL)
{
_DBUS_SET_OOM (error);
goto failed;
}
if (!_dbus_file_get_contents (&data, file, error))
goto failed;
reader = xmlReaderForMemory (_dbus_string_get_const_data (&data),
_dbus_string_get_length (&data),
NULL, NULL, 0);
if (reader == NULL)
{
_DBUS_SET_OOM (error);
goto failed;
}
xmlTextReaderSetParserProp (reader, XML_PARSER_SUBST_ENTITIES, 1);
dbus_error_init (&tmp_error);
xmlTextReaderSetStructuredErrorHandler (reader, xml_text_reader_error, &tmp_error);
while ((ret = xmlTextReaderRead (reader)) == 1)
{
int type;
if (dbus_error_is_set (&tmp_error))
goto reader_out;
type = xmlTextReaderNodeType (reader);
if (type == -1)
{
_DBUS_MAYBE_SET_OOM (&tmp_error);
goto reader_out;
}
switch ((xmlReaderTypes) type) {
case XML_READER_TYPE_ELEMENT:
xml_text_start_element (parser, reader, &tmp_error);
break;
case XML_READER_TYPE_TEXT:
case XML_READER_TYPE_CDATA:
{
DBusString content;
const char *value;
#ifdef __SYMBIAN32__
value = (const char *) xmlTextReaderConstValue (reader);
#else
value = xmlTextReaderConstValue (reader);
#endif
if (value != NULL)
{
_dbus_string_init_const (&content, value);
bus_config_parser_content (parser, &content, &tmp_error);
}
else
_DBUS_MAYBE_SET_OOM (&tmp_error);
break;
}
case XML_READER_TYPE_DOCUMENT_TYPE:
{
const char *name;
#ifdef __SYMBIAN32__
name = (const char *) xmlTextReaderConstName (reader);
#else
name = xmlTextReaderConstName (reader);
#endif
if (name != NULL)
bus_config_parser_check_doctype (parser, name, &tmp_error);
else
_DBUS_MAYBE_SET_OOM (&tmp_error);
break;
}
case XML_READER_TYPE_END_ELEMENT:
{
const char *name;
#ifdef __SYMBIAN32__
name = (const char *) xmlTextReaderConstName (reader);
#else
name = xmlTextReaderConstName (reader);
#endif
if (name != NULL)
bus_config_parser_end_element (parser, name, &tmp_error);
else
_DBUS_MAYBE_SET_OOM (&tmp_error);
break;
}
case XML_READER_TYPE_DOCUMENT:
case XML_READER_TYPE_DOCUMENT_FRAGMENT:
case XML_READER_TYPE_PROCESSING_INSTRUCTION:
case XML_READER_TYPE_COMMENT:
case XML_READER_TYPE_ENTITY:
case XML_READER_TYPE_NOTATION:
case XML_READER_TYPE_WHITESPACE:
case XML_READER_TYPE_SIGNIFICANT_WHITESPACE:
case XML_READER_TYPE_END_ENTITY:
case XML_READER_TYPE_XML_DECLARATION:
/* nothing to do, just read on */
break;
case XML_READER_TYPE_NONE:
case XML_READER_TYPE_ATTRIBUTE:
case XML_READER_TYPE_ENTITY_REFERENCE:
_dbus_assert_not_reached ("unexpected nodes in XML");
}
if (dbus_error_is_set (&tmp_error))
goto reader_out;
}
if (ret == -1)
_DBUS_MAYBE_SET_OOM (&tmp_error);
reader_out:
xmlFreeTextReader (reader);
reader = NULL;
if (dbus_error_is_set (&tmp_error))
{
dbus_move_error (&tmp_error, error);
goto failed;
}
if (!bus_config_parser_finished (parser, error))
goto failed;
_dbus_string_free (&dirname);
_dbus_string_free (&data);
if (is_toplevel)
xmlCleanupParser();
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return parser;
failed:
_DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_string_free (&dirname);
_dbus_string_free (&data);
if (is_toplevel)
xmlCleanupParser();
if (parser)
bus_config_parser_unref (parser);
_dbus_assert (reader == NULL); /* must go to reader_out first */
return NULL;
}
static dbus_bool_t
xml_text_start_element (BusConfigParser *parser,
xmlTextReader *reader,
DBusError *error)
{
const char *name;
int n_attributes;
const char **attribute_names, **attribute_values;
dbus_bool_t ret;
int i, status, is_empty;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
ret = FALSE;
attribute_names = NULL;
attribute_values = NULL;
#ifdef __SYMBIAN32__
name = (const char *) xmlTextReaderConstName (reader);
#else
name = xmlTextReaderConstName (reader);
#endif
n_attributes = xmlTextReaderAttributeCount (reader);
is_empty = xmlTextReaderIsEmptyElement (reader);
if (name == NULL || n_attributes < 0 || is_empty == -1)
{
_DBUS_MAYBE_SET_OOM (error);
goto out;
}
attribute_names = dbus_new0 (const char *, n_attributes + 1);
attribute_values = dbus_new0 (const char *, n_attributes + 1);
if (attribute_names == NULL || attribute_values == NULL)
{
_DBUS_SET_OOM (error);
goto out;
}
i = 0;
while ((status = xmlTextReaderMoveToNextAttribute (reader)) == 1)
{
_dbus_assert (i < n_attributes);
#ifdef __SYMBIAN32__
attribute_names[i] = (const char *) xmlTextReaderConstName (reader);
attribute_values[i] = (const char *) xmlTextReaderConstValue (reader);
#else
attribute_names[i] = xmlTextReaderConstName (reader);
attribute_values[i] = (xmlTextReaderConstValue (reader);
#endif
if (attribute_names[i] == NULL || attribute_values[i] == NULL)
{
_DBUS_MAYBE_SET_OOM (error);
goto out;
}
i++;
}
if (status == -1)
{
_DBUS_MAYBE_SET_OOM (error);
goto out;
}
_dbus_assert (i == n_attributes);
ret = bus_config_parser_start_element (parser, name,
attribute_names, attribute_values,
error);
if (ret && is_empty == 1)
ret = bus_config_parser_end_element (parser, name, error);
out:
dbus_free (attribute_names);
dbus_free (attribute_values);
return ret;
}
/**
* Assigns an error name and message to a DBusError.
* Does nothing if error is #NULL.
*
* The format may be #NULL, which means a (pretty much useless)
* default message will be deduced from the name. This is not a good
* idea, just go ahead and provide a useful error message. It won't
* hurt you.
*
* If no memory can be allocated for the error message,
* an out-of-memory error message will be set instead.
*
* @param error the error.or #NULL
* @param name the error name
* @param format printf-style format string.
*/
void
dbus_set_error (DBusError *error,
const char *name,
const char *format,
...)
{
DBusRealError *real;
DBusString str;
va_list args;
if (error == NULL)
return;
/* it's a bug to pile up errors */
_dbus_return_if_error_is_set (error);
_dbus_return_if_fail (name != NULL);
_dbus_assert (error->name == NULL);
_dbus_assert (error->message == NULL);
if (!_dbus_string_init (&str))
goto nomem;
if (format == NULL)
{
if (!_dbus_string_append (&str,
message_from_error (name)))
{
_dbus_string_free (&str);
goto nomem;
}
}
else
{
va_start (args, format);
if (!_dbus_string_append_printf_valist (&str, format, args))
{
_dbus_string_free (&str);
va_end (args);
goto nomem;
}
va_end (args);
}
real = (DBusRealError *)error;
if (!_dbus_string_steal_data (&str, &real->message))
{
_dbus_string_free (&str);
goto nomem;
}
_dbus_string_free (&str);
real->name = _dbus_strdup (name);
if (real->name == NULL)
{
dbus_free (real->message);
real->message = NULL;
goto nomem;
}
real->const_message = FALSE;
return;
nomem:
_DBUS_SET_OOM (error);
}
/**
* Get a printable string describing the command used to execute
* the process with pid. This string should only be used for
* informative purposes such as logging; it may not be trusted.
*
* The command is guaranteed to be printable ASCII and no longer
* than max_len.
*
* @param pid Process id
* @param str Append command to this string
* @param max_len Maximum length of returned command
* @param error return location for errors
* @returns #FALSE on error
*/
dbus_bool_t
_dbus_command_for_pid (unsigned long pid,
DBusString *str,
int max_len,
DBusError *error)
{
/* This is all Linux-specific for now */
DBusString path;
DBusString cmdline;
int fd;
if (!_dbus_string_init (&path))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_init (&cmdline))
{
_DBUS_SET_OOM (error);
_dbus_string_free (&path);
return FALSE;
}
if (!_dbus_string_append_printf (&path, "/proc/%ld/cmdline", pid))
goto oom;
fd = open (_dbus_string_get_const_data (&path), O_RDONLY);
if (fd < 0)
{
dbus_set_error (error,
_dbus_error_from_errno (errno),
"Failed to open \"%s\": %s",
_dbus_string_get_const_data (&path),
_dbus_strerror (errno));
goto fail;
}
if (!_dbus_read (fd, &cmdline, max_len))
{
dbus_set_error (error,
_dbus_error_from_errno (errno),
"Failed to read from \"%s\": %s",
_dbus_string_get_const_data (&path),
_dbus_strerror (errno));
goto fail;
}
if (!_dbus_close (fd, error))
goto fail;
string_squash_nonprintable (&cmdline);
if (!_dbus_string_copy (&cmdline, 0, str, _dbus_string_get_length (str)))
goto oom;
_dbus_string_free (&cmdline);
_dbus_string_free (&path);
return TRUE;
oom:
_DBUS_SET_OOM (error);
fail:
_dbus_string_free (&cmdline);
_dbus_string_free (&path);
return FALSE;
}
dbus_bool_t
_dbus_become_daemon (const DBusString *pidfile,
int print_pid_fd,
DBusError *error)
{
const char *s;
pid_t child_pid;
int dev_null_fd;
_dbus_verbose ("Becoming a daemon...\n");
_dbus_verbose ("chdir to /\n");
if (chdir ("/") < 0)
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Could not chdir() to root directory");
return FALSE;
}
_dbus_verbose ("forking...\n");
switch ((child_pid = fork ()))
{
case -1:
_dbus_verbose ("fork failed\n");
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to fork daemon: %s", _dbus_strerror (errno));
return FALSE;
break;
case 0:
_dbus_verbose ("in child, closing std file descriptors\n");
/* silently ignore failures here, if someone
* doesn't have /dev/null we may as well try
* to continue anyhow
*/
dev_null_fd = open ("/dev/null", O_RDWR);
if (dev_null_fd >= 0)
{
dup2 (dev_null_fd, 0);
dup2 (dev_null_fd, 1);
s = _dbus_getenv ("DBUS_DEBUG_OUTPUT");
if (s == NULL || *s == '\0')
dup2 (dev_null_fd, 2);
else
_dbus_verbose ("keeping stderr open due to DBUS_DEBUG_OUTPUT\n");
}
/* Get a predictable umask */
_dbus_verbose ("setting umask\n");
umask (022);
break;
default:
if (pidfile)
{
_dbus_verbose ("parent writing pid file\n");
if (!_dbus_write_pid_file (pidfile,
child_pid,
error))
{
_dbus_verbose ("pid file write failed, killing child\n");
kill (child_pid, SIGTERM);
return FALSE;
}
}
/* Write PID if requested */
if (print_pid_fd >= 0)
{
DBusString pid;
int bytes;
if (!_dbus_string_init (&pid))
{
_DBUS_SET_OOM (error);
kill (child_pid, SIGTERM);
return FALSE;
}
if (!_dbus_string_append_int (&pid, child_pid) ||
!_dbus_string_append (&pid, "\n"))
{
_dbus_string_free (&pid);
_DBUS_SET_OOM (error);
kill (child_pid, SIGTERM);
return FALSE;
}
bytes = _dbus_string_get_length (&pid);
if (_dbus_write_socket (print_pid_fd, &pid, 0, bytes) != bytes)
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Printing message bus PID: %s\n",
_dbus_strerror (errno));
_dbus_string_free (&pid);
kill (child_pid, SIGTERM);
return FALSE;
}
_dbus_string_free (&pid);
}
_dbus_verbose ("parent exiting\n");
_exit (0);
break;
}
_dbus_verbose ("calling setsid()\n");
if (setsid () == -1)
_dbus_assert_not_reached ("setsid() failed");
return TRUE;
}
static DBusList*
tokenize_command_line (const char *command_line, DBusError *error)
{
char current_quote;
const char *p;
DBusString current_token;
DBusList *retval = NULL;
dbus_bool_t quoted;;
current_quote = '\0';
quoted = FALSE;
p = command_line;
if (!_dbus_string_init (¤t_token))
{
_DBUS_SET_OOM (error);
return NULL;
}
while (*p)
{
if (current_quote == '\\')
{
if (*p == '\n')
{
/* we append nothing; backslash-newline become nothing */
}
else
{
if (!_dbus_string_append_byte (¤t_token, '\\') ||
!_dbus_string_append_byte (¤t_token, *p))
{
_DBUS_SET_OOM (error);
goto error;
}
}
current_quote = '\0';
}
else if (current_quote == '#')
{
/* Discard up to and including next newline */
while (*p && *p != '\n')
++p;
current_quote = '\0';
if (*p == '\0')
break;
}
else if (current_quote)
{
if (*p == current_quote &&
/* check that it isn't an escaped double quote */
!(current_quote == '"' && quoted))
{
/* close the quote */
current_quote = '\0';
}
/* Everything inside quotes, and the close quote,
* gets appended literally.
*/
if (!_dbus_string_append_byte (¤t_token, *p))
{
_DBUS_SET_OOM (error);
goto error;
}
}
else
{
switch (*p)
{
case '\n':
if (!delimit_token (¤t_token, &retval, error))
goto error;
_dbus_string_free (¤t_token);
if (!_dbus_string_init (¤t_token))
{
_DBUS_SET_OOM (error);
goto init_error;
}
break;
case ' ':
case '\t':
/* If the current token contains the previous char, delimit
* the current token. A nonzero length
* token should always contain the previous char.
*/
if (_dbus_string_get_length (¤t_token) > 0)
{
if (!delimit_token (¤t_token, &retval, error))
goto error;
_dbus_string_free (¤t_token);
if (!_dbus_string_init (¤t_token))
{
_DBUS_SET_OOM (error);
goto init_error;
}
}
/* discard all unquoted blanks (don't add them to a token) */
break;
/* single/double quotes are appended to the token,
* escapes are maybe appended next time through the loop,
* comment chars are never appended.
*/
case '\'':
case '"':
if (!_dbus_string_append_byte (¤t_token, *p))
{
_DBUS_SET_OOM (error);
goto error;
}
/* FALL THRU */
case '#':
case '\\':
current_quote = *p;
break;
default:
/* Combines rules 4) and 6) - if we have a token, append to it,
* otherwise create a new token.
*/
if (!_dbus_string_append_byte (¤t_token, *p))
{
_DBUS_SET_OOM (error);
goto error;
}
break;
}
}
/* We need to count consecutive backslashes mod 2,
* to detect escaped doublequotes.
*/
if (*p != '\\')
quoted = FALSE;
else
quoted = !quoted;
++p;
}
if (!delimit_token (¤t_token, &retval, error))
goto error;
if (current_quote)
{
dbus_set_error_const (error, DBUS_ERROR_INVALID_ARGS, "Unclosed quotes in command line");
goto error;
}
if (retval == NULL)
{
dbus_set_error_const (error, DBUS_ERROR_INVALID_ARGS, "No tokens found in command line");
goto error;
}
_dbus_string_free (¤t_token);
return retval;
error:
_dbus_string_free (¤t_token);
init_error:
if (retval)
{
_dbus_list_foreach (&retval, (DBusForeachFunction) dbus_free, NULL);
_dbus_list_clear (&retval);
}
return NULL;
}
/**
* Tries to interpret the address entry in a platform-specific
* way, creating a platform-specific server type if appropriate.
* Sets error if the result is not OK.
*
* @param entry an address entry
* @param server_p location to store a new DBusServer, or #NULL on failure.
* @param error location to store rationale for failure on bad address
* @returns the outcome
*
*/
DBusServerListenResult
_dbus_server_listen_platform_specific (DBusAddressEntry *entry,
DBusServer **server_p,
DBusError *error)
{
const char *method;
*server_p = NULL;
method = dbus_address_entry_get_method (entry);
if (strcmp (method, "unix") == 0)
{
const char *path = dbus_address_entry_get_value (entry, "path");
const char *tmpdir = dbus_address_entry_get_value (entry, "tmpdir");
const char *abstract = dbus_address_entry_get_value (entry, "abstract");
if (path == NULL && tmpdir == NULL && abstract == NULL)
{
_dbus_set_bad_address(error, "unix",
"path or tmpdir or abstract",
NULL);
return DBUS_SERVER_LISTEN_BAD_ADDRESS;
}
if ((path && tmpdir) ||
(path && abstract) ||
(tmpdir && abstract))
{
_dbus_set_bad_address(error, NULL, NULL,
"cannot specify two of \"path\" and \"tmpdir\" and \"abstract\" at the same time");
return DBUS_SERVER_LISTEN_BAD_ADDRESS;
}
if (tmpdir != NULL)
{
DBusString full_path;
DBusString filename;
if (!_dbus_string_init (&full_path))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
}
if (!_dbus_string_init (&filename))
{
_dbus_string_free (&full_path);
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
}
if (!_dbus_string_append (&filename,
"dbus-") ||
!_dbus_generate_random_ascii (&filename, 10) ||
!_dbus_string_append (&full_path, tmpdir) ||
!_dbus_concat_dir_and_file (&full_path, &filename))
{
_dbus_string_free (&full_path);
_dbus_string_free (&filename);
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
}
/* Always use abstract namespace if possible with tmpdir */
*server_p =
_dbus_server_new_for_domain_socket (_dbus_string_get_const_data (&full_path),
#ifdef HAVE_ABSTRACT_SOCKETS
TRUE,
#else
FALSE,
#endif
error);
_dbus_string_free (&full_path);
_dbus_string_free (&filename);
}
else
{
if (path)
*server_p = _dbus_server_new_for_domain_socket (path, FALSE, error);
else
*server_p = _dbus_server_new_for_domain_socket (abstract, TRUE, error);
}
if (*server_p != NULL)
{
_DBUS_ASSERT_ERROR_IS_CLEAR(error);
return DBUS_SERVER_LISTEN_OK;
}
else
{
_DBUS_ASSERT_ERROR_IS_SET(error);
return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
}
}
else if (strcmp (method, "systemd") == 0)
{
int i, n, *fds;
DBusString address;
n = _dbus_listen_systemd_sockets (&fds, error);
if (n < 0)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
}
if (!_dbus_string_init (&address))
goto systemd_oom;
for (i = 0; i < n; i++)
{
if (i > 0)
{
if (!_dbus_string_append (&address, ";"))
goto systemd_oom;
}
if (!_dbus_append_address_from_socket (fds[i], &address, error))
goto systemd_err;
}
*server_p = _dbus_server_new_for_socket (fds, n, &address, NULL);
if (*server_p == NULL)
goto systemd_oom;
dbus_free (fds);
return DBUS_SERVER_LISTEN_OK;
systemd_oom:
_DBUS_SET_OOM (error);
systemd_err:
for (i = 0; i < n; i++)
{
_dbus_close_socket (fds[i], NULL);
}
dbus_free (fds);
_dbus_string_free (&address);
return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
}
#ifdef DBUS_ENABLE_LAUNCHD
else if (strcmp (method, "launchd") == 0)
{
const char *launchd_env_var = dbus_address_entry_get_value (entry, "env");
if (launchd_env_var == NULL)
{
_dbus_set_bad_address (error, "launchd", "env", NULL);
return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
}
*server_p = _dbus_server_new_for_launchd (launchd_env_var, error);
if (*server_p != NULL)
{
_DBUS_ASSERT_ERROR_IS_CLEAR(error);
return DBUS_SERVER_LISTEN_OK;
}
else
{
_DBUS_ASSERT_ERROR_IS_SET(error);
return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
}
}
#endif
else
{
/* If we don't handle the method, we return NULL with the
* error unset
*/
_DBUS_ASSERT_ERROR_IS_CLEAR(error);
return DBUS_SERVER_LISTEN_NOT_HANDLED;
}
}
/**
* Checks to see if the UID sent in is the console user
*
* @param uid UID of person to check
* @param error return location for errors
* @returns #TRUE if the UID is the same as the console user and there are no errors
*/
dbus_bool_t
_dbus_is_console_user (dbus_uid_t uid,
DBusError *error)
{
DBusUserDatabase *db;
const DBusUserInfo *info;
dbus_bool_t result = FALSE;
#ifdef HAVE_SYSTEMD
/* check if we have logind */
if (access ("/run/systemd/seats/", F_OK) >= 0)
{
int r;
/* Check whether this user is logged in on at least one physical
seat */
r = sd_uid_get_seats (uid, 0, NULL);
if (r < 0)
{
dbus_set_error (error, _dbus_error_from_errno (-r),
"Failed to determine seats of user \"" DBUS_UID_FORMAT "\": %s",
uid,
_dbus_strerror (-r));
return FALSE;
}
return (r > 0);
}
#endif
#ifdef HAVE_CONSOLE_OWNER_FILE
DBusString f;
DBusStat st;
if (!_dbus_string_init (&f))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_append(&f, DBUS_CONSOLE_OWNER_FILE))
{
_dbus_string_free(&f);
_DBUS_SET_OOM (error);
return FALSE;
}
if (_dbus_stat(&f, &st, NULL) && (st.uid == uid))
{
_dbus_string_free(&f);
return TRUE;
}
_dbus_string_free(&f);
#endif /* HAVE_CONSOLE_OWNER_FILE */
if (!_dbus_user_database_lock_system ())
{
_DBUS_SET_OOM (error);
return FALSE;
}
db = _dbus_user_database_get_system ();
if (db == NULL)
{
dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get system database.");
_dbus_user_database_unlock_system ();
return FALSE;
}
/* TPTD: this should be cache-safe, we've locked the DB and
_dbus_user_at_console doesn't pass it on. */
info = _dbus_user_database_lookup (db, uid, NULL, error);
if (info == NULL)
{
_dbus_user_database_unlock_system ();
return FALSE;
}
result = _dbus_user_at_console (info->username, error);
_dbus_user_database_unlock_system ();
return result;
}
void
_dbus_set_error_valist (DBusError *error,
const char *name,
const char *format,
va_list args)
{
DBusRealError *real;
DBusString str;
_dbus_assert (name != NULL);
if (error == NULL)
return;
_dbus_assert (error->name == NULL);
_dbus_assert (error->message == NULL);
if (!_dbus_string_init (&str))
goto nomem;
if (format == NULL)
{
if (!_dbus_string_append (&str,
message_from_error (name)))
{
_dbus_string_free (&str);
goto nomem;
}
}
else
{
if (!_dbus_string_append_printf_valist (&str, format, args))
{
_dbus_string_free (&str);
goto nomem;
}
}
real = (DBusRealError *)error;
if (!_dbus_string_steal_data (&str, &real->message))
{
_dbus_string_free (&str);
goto nomem;
}
_dbus_string_free (&str);
real->name = _dbus_strdup (name);
if (real->name == NULL)
{
dbus_free (real->message);
real->message = NULL;
goto nomem;
}
real->const_message = FALSE;
return;
nomem:
_DBUS_SET_OOM (error);
}
static dbus_bool_t
_dbus_read_uuid_file_without_creating (const DBusString *filename,
DBusGUID *uuid,
DBusError *error)
{
DBusString contents;
DBusString decoded;
int end;
if (!_dbus_string_init (&contents))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_init (&decoded))
{
_dbus_string_free (&contents);
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_file_get_contents (&contents, filename, error))
goto error;
_dbus_string_chop_white (&contents);
if (_dbus_string_get_length (&contents) != DBUS_UUID_LENGTH_HEX)
{
dbus_set_error (error, DBUS_ERROR_INVALID_FILE_CONTENT,
"UUID file '%s' should contain a hex string of length %d, not length %d, with no other text",
_dbus_string_get_const_data (filename),
DBUS_UUID_LENGTH_HEX,
_dbus_string_get_length (&contents));
goto error;
}
if (!_dbus_string_hex_decode (&contents, 0, &end, &decoded, 0))
{
_DBUS_SET_OOM (error);
goto error;
}
if (end == 0)
{
dbus_set_error (error, DBUS_ERROR_INVALID_FILE_CONTENT,
"UUID file '%s' contains invalid hex data",
_dbus_string_get_const_data (filename));
goto error;
}
if (_dbus_string_get_length (&decoded) != DBUS_UUID_LENGTH_BYTES)
{
dbus_set_error (error, DBUS_ERROR_INVALID_FILE_CONTENT,
"UUID file '%s' contains %d bytes of hex-encoded data instead of %d",
_dbus_string_get_const_data (filename),
_dbus_string_get_length (&decoded),
DBUS_UUID_LENGTH_BYTES);
goto error;
}
_dbus_string_copy_to_buffer (&decoded, uuid->as_bytes, DBUS_UUID_LENGTH_BYTES);
_dbus_string_free (&decoded);
_dbus_string_free (&contents);
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return TRUE;
error:
_DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_string_free (&contents);
_dbus_string_free (&decoded);
return FALSE;
}
/**
* _dbus_shell_parse_argv:
*
* Parses a command line into an argument vector, in much the same way
* the shell would, but without many of the expansions the shell would
* perform (variable expansion, globs, operators, filename expansion,
* etc. are not supported). The results are defined to be the same as
* those you would get from a UNIX98 /bin/sh, as long as the input
* contains none of the unsupported shell expansions. If the input
* does contain such expansions, they are passed through
* literally. Free the returned vector with dbus_free_string_array().
*
* @command_line: command line to parse
* @argcp: return location for number of args
* @argvp: return location for array of args
* @error: error information
**/
dbus_bool_t
_dbus_shell_parse_argv (const char *command_line,
int *argcp,
char ***argvp,
DBusError *error)
{
/* Code based on poptParseArgvString() from libpopt */
int argc = 0;
char **argv = NULL;
DBusList *tokens = NULL;
int i;
DBusList *tmp_list;
if (!command_line)
{
_dbus_verbose ("Command line is NULL\n");
return FALSE;
}
tokens = tokenize_command_line (command_line, error);
if (tokens == NULL)
{
_dbus_verbose ("No tokens for command line '%s'\n", command_line);
return FALSE;
}
/* Because we can't have introduced any new blank space into the
* tokens (we didn't do any new expansions), we don't need to
* perform field splitting. If we were going to honor IFS or do any
* expansions, we would have to do field splitting on each word
* here. Also, if we were going to do any expansion we would need to
* remove any zero-length words that didn't contain quotes
* originally; but since there's no expansion we know all words have
* nonzero length, unless they contain quotes.
*
* So, we simply remove quotes, and don't do any field splitting or
* empty word removal, since we know there was no way to introduce
* such things.
*/
argc = _dbus_list_get_length (&tokens);
argv = dbus_new (char *, argc + 1);
if (!argv)
{
_DBUS_SET_OOM (error);
goto error;
}
i = 0;
tmp_list = tokens;
while (tmp_list)
{
argv[i] = _dbus_shell_unquote (tmp_list->data);
if (!argv[i])
{
int j;
for (j = 0; j < i; j++)
dbus_free(argv[j]);
dbus_free (argv);
_DBUS_SET_OOM (error);
goto error;
}
tmp_list = _dbus_list_get_next_link (&tokens, tmp_list);
++i;
}
argv[argc] = NULL;
_dbus_list_foreach (&tokens, (DBusForeachFunction) dbus_free, NULL);
_dbus_list_clear (&tokens);
if (argcp)
*argcp = argc;
if (argvp)
*argvp = argv;
else
dbus_free_string_array (argv);
return TRUE;
error:
_dbus_list_foreach (&tokens, (DBusForeachFunction) dbus_free, NULL);
_dbus_list_clear (&tokens);
return FALSE;
}
/**
* Connects to a bus daemon and registers the client with it. If a
* connection to the bus already exists, then that connection is
* returned. Caller owns a reference to the bus.
*
* @todo alex thinks we should nullify the connection when we get a disconnect-message.
*
* @param type bus type
* @param error address where an error can be returned.
* @returns a DBusConnection with new ref
*/
DBusConnection *
dbus_bus_get (DBusBusType type,
DBusError *error)
{
const char *address;
DBusConnection *connection;
BusData *bd;
DBusBusType address_type;
_dbus_return_val_if_fail (type >= 0 && type < N_BUS_TYPES, NULL);
_dbus_return_val_if_error_is_set (error, NULL);
_DBUS_LOCK (bus);
if (!init_connections_unlocked ())
{
_DBUS_UNLOCK (bus);
_DBUS_SET_OOM (error);
return NULL;
}
/* We want to use the activation address even if the
* activating bus is the session or system bus,
* per the spec.
*/
address_type = type;
/* Use the real type of the activation bus for getting its
* connection, but only if the real type's address is available. (If
* the activating bus isn't a well-known bus then
* activation_bus_type == DBUS_BUS_STARTER)
*/
if (type == DBUS_BUS_STARTER &&
bus_connection_addresses[activation_bus_type] != NULL)
type = activation_bus_type;
if (bus_connections[type] != NULL)
{
connection = bus_connections[type];
dbus_connection_ref (connection);
_DBUS_UNLOCK (bus);
return connection;
}
address = bus_connection_addresses[address_type];
if (address == NULL)
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Unable to determine the address of the message bus");
_DBUS_UNLOCK (bus);
return NULL;
}
connection = dbus_connection_open (address, error);
if (!connection)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
_DBUS_UNLOCK (bus);
return NULL;
}
/* By default we're bound to the lifecycle of
* the message bus.
*/
dbus_connection_set_exit_on_disconnect (connection,
TRUE);
if (!dbus_bus_register (connection, error))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_connection_close (connection);
dbus_connection_unref (connection);
_DBUS_UNLOCK (bus);
return NULL;
}
bus_connections[type] = connection;
bd = ensure_bus_data (connection);
_dbus_assert (bd != NULL);
bd->is_well_known = TRUE;
_DBUS_UNLOCK (bus);
return connection;
}
/**
* Writes the given pid_to_write to a pidfile (if non-NULL) and/or to a
* pipe (if non-NULL). Does nothing if pidfile and print_pid_pipe are both
* NULL.
*
* @param pidfile the file to write to or #NULL
* @param print_pid_pipe the pipe to write to or #NULL
* @param pid_to_write the pid to write out
* @param error error on failure
* @returns FALSE if error is set
*/
dbus_bool_t
_dbus_write_pid_to_file_and_pipe (const DBusString *pidfile,
DBusPipe *print_pid_pipe,
dbus_pid_t pid_to_write,
DBusError *error)
{
if (pidfile)
{
_dbus_verbose ("writing pid file %s\n", _dbus_string_get_const_data (pidfile));
if (!_dbus_write_pid_file (pidfile,
pid_to_write,
error))
{
_dbus_verbose ("pid file write failed\n");
_DBUS_ASSERT_ERROR_IS_SET(error);
return FALSE;
}
}
else
{
_dbus_verbose ("No pid file requested\n");
}
if (print_pid_pipe != NULL && _dbus_pipe_is_valid (print_pid_pipe))
{
DBusString pid;
int bytes;
_dbus_verbose ("writing our pid to pipe %d\n",
print_pid_pipe->fd);
if (!_dbus_string_init (&pid))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_append_int (&pid, pid_to_write) ||
!_dbus_string_append (&pid, "\n"))
{
_dbus_string_free (&pid);
_DBUS_SET_OOM (error);
return FALSE;
}
bytes = _dbus_string_get_length (&pid);
if (_dbus_pipe_write (print_pid_pipe, &pid, 0, bytes, error) != bytes)
{
/* _dbus_pipe_write sets error only on failure, not short write */
if (error != NULL && !dbus_error_is_set(error))
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Printing message bus PID: did not write enough bytes\n");
}
_dbus_string_free (&pid);
return FALSE;
}
_dbus_string_free (&pid);
}
else
{
_dbus_verbose ("No pid pipe to write to\n");
}
return TRUE;
}
/**
* Registers a connection with the bus. This must be the first
* thing an application does when connecting to the message bus.
* If registration succeeds, the unique name will be set,
* and can be obtained using dbus_bus_get_unique_name().
*
* @param connection the connection
* @param error place to store errors
* @returns #TRUE on success
*/
dbus_bool_t
dbus_bus_register (DBusConnection *connection,
DBusError *error)
{
DBusMessage *message, *reply;
char *name;
BusData *bd;
dbus_bool_t retval;
_dbus_return_val_if_fail (connection != NULL, FALSE);
_dbus_return_val_if_error_is_set (error, FALSE);
retval = FALSE;
bd = ensure_bus_data (connection);
if (bd == NULL)
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (bd->unique_name != NULL)
{
_dbus_warn ("Attempt to register the same DBusConnection with the message bus, but it is already registered\n");
/* This isn't an error, it's a programming bug. We'll be nice
* and not _dbus_assert_not_reached()
*/
return TRUE;
}
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"Hello");
if (!message)
{
_DBUS_SET_OOM (error);
return FALSE;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1, error);
dbus_message_unref (message);
if (reply == NULL)
goto out;
else if (dbus_set_error_from_message (error, reply))
goto out;
else if (!dbus_message_get_args (reply, error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
goto out;
bd->unique_name = _dbus_strdup (name);
if (bd->unique_name == NULL)
{
_DBUS_SET_OOM (error);
goto out;
}
retval = TRUE;
out:
if (reply)
dbus_message_unref (reply);
if (!retval)
_DBUS_ASSERT_ERROR_IS_SET (error);
return retval;
}
dbus_bool_t
_dbus_spawn_async_with_babysitter (DBusBabysitter **sitter_p,
char **argv,
char **envp,
DBusSpawnChildSetupFunc child_setup,
void *user_data,
DBusError *error)
{
DBusBabysitter *sitter;
HANDLE sitter_thread;
int sitter_thread_id;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
*sitter_p = NULL;
PING();
sitter = _dbus_babysitter_new ();
if (sitter == NULL)
{
_DBUS_SET_OOM (error);
return FALSE;
}
sitter->child_setup = child_setup;
sitter->user_data = user_data;
sitter->executable = _dbus_strdup (argv[0]);
if (sitter->executable == NULL)
{
_DBUS_SET_OOM (error);
goto out0;
}
PING();
if (!_dbus_full_duplex_pipe (&sitter->socket_to_babysitter,
&sitter->socket_to_main,
FALSE, error))
goto out0;
sitter->sitter_watch = _dbus_watch_new (sitter->socket_to_babysitter,
DBUS_WATCH_READABLE,
TRUE, handle_watch, sitter, NULL);
PING();
if (sitter->sitter_watch == NULL)
{
_DBUS_SET_OOM (error);
goto out0;
}
PING();
if (!_dbus_watch_list_add_watch (sitter->watches, sitter->sitter_watch))
{
_DBUS_SET_OOM (error);
goto out0;
}
sitter->argc = protect_argv (argv, &sitter->argv);
if (sitter->argc == -1)
{
_DBUS_SET_OOM (error);
goto out0;
}
sitter->envp = envp;
PING();
sitter_thread = (HANDLE) _beginthreadex (NULL, 0, babysitter,
sitter, 0, &sitter_thread_id);
if (sitter_thread == 0)
{
PING();
dbus_set_error_const (error, DBUS_ERROR_SPAWN_FORK_FAILED,
"Failed to create new thread");
goto out0;
}
CloseHandle (sitter_thread);
PING();
WaitForSingleObject (sitter->start_sync_event, INFINITE);
PING();
if (sitter_p != NULL)
*sitter_p = sitter;
else
_dbus_babysitter_unref (sitter);
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
PING();
return TRUE;
out0:
_dbus_babysitter_unref (sitter);
return FALSE;
}
/**
* Asks the bus to return the uid of the named
* connection.
*
* @param connection the connection
* @param name a name owned by the connection
* @param error location to store the error
* @returns a result code, -1 if error is set
*/
unsigned long
dbus_bus_get_unix_user (DBusConnection *connection,
const char *name,
DBusError *error)
{
DBusMessage *message, *reply;
dbus_uint32_t uid;
_dbus_return_val_if_fail (connection != NULL, DBUS_UID_UNSET);
_dbus_return_val_if_fail (name != NULL, DBUS_UID_UNSET);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), DBUS_UID_UNSET);
_dbus_return_val_if_error_is_set (error, DBUS_UID_UNSET);
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"GetConnectionUnixUser");
if (message == NULL)
{
_DBUS_SET_OOM (error);
return DBUS_UID_UNSET;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
{
dbus_message_unref (message);
_DBUS_SET_OOM (error);
return DBUS_UID_UNSET;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1,
error);
dbus_message_unref (message);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return DBUS_UID_UNSET;
}
if (dbus_set_error_from_message (error, reply))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return DBUS_UID_UNSET;
}
if (!dbus_message_get_args (reply, error,
DBUS_TYPE_UINT32, &uid,
DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return DBUS_UID_UNSET;
}
dbus_message_unref (reply);
return (unsigned long) uid;
}
/**
* Checks to see if the UID sent in is the console user
*
* @param uid UID of person to check
* @param error return location for errors
* @returns #TRUE if the UID is the same as the console user and there are no errors
*/
dbus_bool_t
_dbus_is_console_user (dbus_uid_t uid,
DBusError *error)
{
DBusUserDatabase *db;
const DBusUserInfo *info;
dbus_bool_t result = FALSE;
#ifdef HAVE_CONSOLE_OWNER_FILE
DBusString f;
DBusStat st;
if (!_dbus_string_init (&f))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_append(&f, DBUS_CONSOLE_OWNER_FILE))
{
_dbus_string_free(&f);
_DBUS_SET_OOM (error);
return FALSE;
}
if (_dbus_stat(&f, &st, NULL) && (st.uid == uid))
{
_dbus_string_free(&f);
return TRUE;
}
_dbus_string_free(&f);
#endif /* HAVE_CONSOLE_OWNER_FILE */
_dbus_user_database_lock_system ();
db = _dbus_user_database_get_system ();
if (db == NULL)
{
dbus_set_error (error, DBUS_ERROR_FAILED, "Could not get system database.");
_dbus_user_database_unlock_system ();
return FALSE;
}
/* TPTD: this should be cache-safe, we've locked the DB and
_dbus_user_at_console doesn't pass it on. */
info = _dbus_user_database_lookup (db, uid, NULL, error);
if (info == NULL)
{
_dbus_user_database_unlock_system ();
return FALSE;
}
result = _dbus_user_at_console (info->username, error);
_dbus_user_database_unlock_system ();
return result;
}
/**
* Asks the bus to assign the given name to this connection by invoking
* the RequestName method on the bus. This method is fully documented
* in the D-BUS specification. For quick reference, the flags and
* result codes are discussed here, but the specification is the
* canonical version of this information.
*
* The #DBUS_NAME_FLAG_PROHIBIT_REPLACEMENT flag indicates that
* if the name is successfully requested, other applications
* will not be able to take over the name. i.e. the name's
* owner (the application calling this function) must let go of
* the name, it will not lose it involuntarily.
*
* The #DBUS_NAME_FLAG_REPLACE_EXISTING flag indicates that the caller
* would like to take over the name from the current owner.
* If the current name owner used #DBUS_NAME_FLAG_PROHIBIT_REPLACEMENT
* then this flag indicates that the caller would like to be placed
* in the queue to own the name when the current owner lets go.
*
* If no flags are given, an application will receive the requested
* name only if the name is currently unowned; and it will give
* up the name if another application asks to take it over using
* #DBUS_NAME_FLAG_REPLACE_EXISTING.
*
* This function returns a result code. The possible result codes
* are as follows.
*
* #DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER means that the name had no
* existing owner, and the caller is now the primary owner; or that
* the name had an owner, and the caller specified
* #DBUS_NAME_FLAG_REPLACE_EXISTING, and the current owner did not
* specify #DBUS_NAME_FLAG_PROHIBIT_REPLACEMENT.
*
* #DBUS_REQUEST_NAME_REPLY_IN_QUEUE happens only if the current owner
* specified #DBUS_NAME_FLAG_PROHIBIT_REPLACEMENT and the caller specified
* #DBUS_NAME_FLAG_REPLACE_EXISTING. In this case the caller ends up in
* a queue to own the name after the current owner gives it up.
*
* #DBUS_REQUEST_NAME_REPLY_EXISTS happens if the name has an owner
* #already and DBUS_NAME_FLAG_REPLACE_EXISTING was not specified.
*
* #DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER happens if an application
* requests a name it already owns.
*
* When a service represents an application, say "text editor," then
* it should specify #DBUS_NAME_FLAG_PROHIBIT_REPLACEMENT if it wants
* the first editor started to be the user's editor vs. the last one
* started. Then any editor that can be the user's editor should
* specify #DBUS_NAME_FLAG_REPLACE_EXISTING to either take over
* (last-started-wins) or be queued up (first-started-wins) according
* to whether #DBUS_NAME_FLAG_PROHIBIT_REPLACEMENT was given.
*
* @todo this all seems sort of broken. Shouldn't the flags be a property
* of the name, not the app requesting the name? What are the use-cases
* other than the "text editor" thing and how are we supporting them?
*
* @param connection the connection
* @param name the name to request
* @param flags flags
* @param error location to store the error
* @returns a result code, -1 if error is set
*/
int
dbus_bus_request_name (DBusConnection *connection,
const char *name,
unsigned int flags,
DBusError *error)
{
DBusMessage *message, *reply;
dbus_uint32_t result;
_dbus_return_val_if_fail (connection != NULL, 0);
_dbus_return_val_if_fail (name != NULL, 0);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), 0);
_dbus_return_val_if_error_is_set (error, 0);
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"RequestName");
if (message == NULL)
{
_DBUS_SET_OOM (error);
return -1;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_UINT32, &flags,
DBUS_TYPE_INVALID))
{
dbus_message_unref (message);
_DBUS_SET_OOM (error);
return -1;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1,
error);
dbus_message_unref (message);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return -1;
}
if (dbus_set_error_from_message (error, reply))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return -1;
}
if (!dbus_message_get_args (reply, error,
DBUS_TYPE_UINT32, &result,
DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return -1;
}
dbus_message_unref (reply);
return result;
}
