gdbus: Remove unused result variable from g_dbus_pending_success
[platform/upstream/connman.git] / gdbus / object.c
1 /*
2  *
3  *  D-Bus helper library
4  *
5  *  Copyright (C) 2004-2011  Marcel Holtmann <marcel@holtmann.org>
6  *
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
21  *
22  */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include <stdio.h>
29 #include <string.h>
30
31 #include <glib.h>
32 #include <dbus/dbus.h>
33
34 #include "gdbus.h"
35
36 #define info(fmt...)
37 #define error(fmt...)
38 #define debug(fmt...)
39
40 struct generic_data {
41         unsigned int refcount;
42         GSList *interfaces;
43         char *introspect;
44 };
45
46 struct interface_data {
47         char *name;
48         const GDBusMethodTable *methods;
49         const GDBusSignalTable *signals;
50         const GDBusPropertyTable *properties;
51         void *user_data;
52         GDBusDestroyFunction destroy;
53 };
54
55 struct security_data {
56         GDBusPendingReply pending;
57         DBusMessage *message;
58         const GDBusMethodTable *method;
59         void *iface_user_data;
60 };
61
62 static void print_arguments(GString *gstr, const char *sig,
63                                                 const char *direction)
64 {
65         int i;
66
67         for (i = 0; sig[i]; i++) {
68                 char type[32];
69                 int struct_level, dict_level;
70                 unsigned int len;
71                 gboolean complete;
72
73                 complete = FALSE;
74                 struct_level = dict_level = 0;
75                 memset(type, 0, sizeof(type));
76
77                 /* Gather enough data to have a single complete type */
78                 for (len = 0; len < (sizeof(type) - 1) && sig[i]; len++, i++) {
79                         switch (sig[i]){
80                         case '(':
81                                 struct_level++;
82                                 break;
83                         case ')':
84                                 struct_level--;
85                                 if (struct_level <= 0 && dict_level <= 0)
86                                         complete = TRUE;
87                                 break;
88                         case '{':
89                                 dict_level++;
90                                 break;
91                         case '}':
92                                 dict_level--;
93                                 if (struct_level <= 0 && dict_level <= 0)
94                                         complete = TRUE;
95                                 break;
96                         case 'a':
97                                 break;
98                         default:
99                                 if (struct_level <= 0 && dict_level <= 0)
100                                         complete = TRUE;
101                                 break;
102                         }
103
104                         type[len] = sig[i];
105
106                         if (complete)
107                                 break;
108                 }
109
110
111                 if (direction)
112                         g_string_append_printf(gstr,
113                                         "\t\t\t<arg type=\"%s\" direction=\"%s\"/>\n",
114                                         type, direction);
115                 else
116                         g_string_append_printf(gstr,
117                                         "\t\t\t<arg type=\"%s\"/>\n",
118                                         type);
119         }
120 }
121
122 static void generate_interface_xml(GString *gstr, struct interface_data *iface)
123 {
124         const GDBusMethodTable *method;
125         const GDBusSignalTable *signal;
126
127         for (method = iface->methods; method && method->name; method++) {
128                 if (!strlen(method->signature) && !strlen(method->reply))
129                         g_string_append_printf(gstr, "\t\t<method name=\"%s\"/>\n",
130                                                                 method->name);
131                 else {
132                         g_string_append_printf(gstr, "\t\t<method name=\"%s\">\n",
133                                                                 method->name);
134                         print_arguments(gstr, method->signature, "in");
135                         print_arguments(gstr, method->reply, "out");
136                         g_string_append_printf(gstr, "\t\t</method>\n");
137                 }
138         }
139
140         for (signal = iface->signals; signal && signal->name; signal++) {
141                 if (!strlen(signal->signature))
142                         g_string_append_printf(gstr, "\t\t<signal name=\"%s\"/>\n",
143                                                                 signal->name);
144                 else {
145                         g_string_append_printf(gstr, "\t\t<signal name=\"%s\">\n",
146                                                                 signal->name);
147                         print_arguments(gstr, signal->signature, NULL);
148                         g_string_append_printf(gstr, "\t\t</signal>\n");
149                 }
150         }
151 }
152
153 static void generate_introspection_xml(DBusConnection *conn,
154                                 struct generic_data *data, const char *path)
155 {
156         GSList *list;
157         GString *gstr;
158         char **children;
159         int i;
160
161         g_free(data->introspect);
162
163         gstr = g_string_new(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE);
164
165         g_string_append_printf(gstr, "<node>\n");
166
167         for (list = data->interfaces; list; list = list->next) {
168                 struct interface_data *iface = list->data;
169
170                 g_string_append_printf(gstr, "\t<interface name=\"%s\">\n",
171                                                                 iface->name);
172
173                 generate_interface_xml(gstr, iface);
174
175                 g_string_append_printf(gstr, "\t</interface>\n");
176         }
177
178         if (!dbus_connection_list_registered(conn, path, &children))
179                 goto done;
180
181         for (i = 0; children[i]; i++)
182                 g_string_append_printf(gstr, "\t<node name=\"%s\"/>\n",
183                                                                 children[i]);
184
185         dbus_free_string_array(children);
186
187 done:
188         g_string_append_printf(gstr, "</node>\n");
189
190         data->introspect = g_string_free(gstr, FALSE);
191 }
192
193 static DBusMessage *introspect(DBusConnection *connection,
194                                 DBusMessage *message, void *user_data)
195 {
196         struct generic_data *data = user_data;
197         DBusMessage *reply;
198
199         if (!dbus_message_has_signature(message, DBUS_TYPE_INVALID_AS_STRING)) {
200                 error("Unexpected signature to introspect call");
201                 return NULL;
202         }
203
204         if (data->introspect == NULL)
205                 generate_introspection_xml(connection, data,
206                                                 dbus_message_get_path(message));
207
208         reply = dbus_message_new_method_return(message);
209         if (reply == NULL)
210                 return NULL;
211
212         dbus_message_append_args(reply, DBUS_TYPE_STRING, &data->introspect,
213                                         DBUS_TYPE_INVALID);
214
215         return reply;
216 }
217
218 static DBusHandlerResult process_message(DBusConnection *connection,
219                         DBusMessage *message, const GDBusMethodTable *method,
220                                                         void *iface_user_data)
221 {
222         DBusMessage *reply;
223
224         reply = method->function(connection, message, iface_user_data);
225
226         if (method->flags & G_DBUS_METHOD_FLAG_NOREPLY) {
227                 if (reply != NULL)
228                         dbus_message_unref(reply);
229                 return DBUS_HANDLER_RESULT_HANDLED;
230         }
231
232         if (method->flags & G_DBUS_METHOD_FLAG_ASYNC) {
233                 if (reply == NULL)
234                         return DBUS_HANDLER_RESULT_HANDLED;
235         }
236
237         if (reply == NULL)
238                 return DBUS_HANDLER_RESULT_NEED_MEMORY;
239
240         dbus_connection_send(connection, reply, NULL);
241         dbus_message_unref(reply);
242
243         return DBUS_HANDLER_RESULT_HANDLED;
244 }
245
246 static GDBusPendingReply next_pending = 1;
247 static GSList *pending_security = NULL;
248
249 static const GDBusSecurityTable *security_table = NULL;
250
251 void g_dbus_pending_success(DBusConnection *connection,
252                                         GDBusPendingReply pending)
253 {
254         GSList *list;
255
256         for (list = pending_security; list; list = list->next) {
257                 struct security_data *secdata = list->data;
258
259                 if (secdata->pending != pending)
260                         continue;
261
262                 pending_security = g_slist_remove(pending_security, secdata);
263
264                 process_message(connection, secdata->message,
265                                 secdata->method, secdata->iface_user_data);
266
267                 dbus_message_unref(secdata->message);
268                 g_free(secdata);
269                 return;
270         }
271 }
272
273 void g_dbus_pending_error_valist(DBusConnection *connection,
274                                 GDBusPendingReply pending, const char *name,
275                                         const char *format, va_list args)
276 {
277         GSList *list;
278
279         for (list = pending_security; list; list = list->next) {
280                 struct security_data *secdata = list->data;
281                 DBusMessage *reply;
282
283                 if (secdata->pending != pending)
284                         continue;
285
286                 pending_security = g_slist_remove(pending_security, secdata);
287
288                 reply = g_dbus_create_error_valist(secdata->message,
289                                                         name, format, args);
290                 if (reply != NULL) {
291                         dbus_connection_send(connection, reply, NULL);
292                         dbus_message_unref(reply);
293                 }
294
295                 dbus_message_unref(secdata->message);
296                 g_free(secdata);
297                 return;
298         }
299 }
300
301 void g_dbus_pending_error(DBusConnection *connection,
302                                 GDBusPendingReply pending,
303                                 const char *name, const char *format, ...)
304 {
305         va_list args;
306
307         va_start(args, format);
308
309         g_dbus_pending_error_valist(connection, pending, name, format, args);
310
311         va_end(args);
312 }
313
314 int polkit_check_authorization(DBusConnection *conn,
315                                 const char *action, gboolean interaction,
316                                 void (*function) (dbus_bool_t authorized,
317                                                         void *user_data),
318                                                 void *user_data, int timeout);
319
320 struct builtin_security_data {
321         DBusConnection *conn;
322         GDBusPendingReply pending;
323 };
324
325 static void builtin_security_result(dbus_bool_t authorized, void *user_data)
326 {
327         struct builtin_security_data *data = user_data;
328
329         if (authorized == TRUE)
330                 g_dbus_pending_success(data->conn, data->pending);
331         else
332                 g_dbus_pending_error(data->conn, data->pending,
333                                                 DBUS_ERROR_AUTH_FAILED, NULL);
334
335         g_free(data);
336 }
337
338 static void builtin_security_function(DBusConnection *conn,
339                                                 const char *action,
340                                                 gboolean interaction,
341                                                 GDBusPendingReply pending)
342 {
343         struct builtin_security_data *data;
344
345         data = g_new0(struct builtin_security_data, 1);
346         data->conn = conn;
347         data->pending = pending;
348
349         if (polkit_check_authorization(conn, action, interaction,
350                                 builtin_security_result, data, 30000) < 0)
351                 g_dbus_pending_error(conn, pending, NULL, NULL);
352 }
353
354 static gboolean check_privilege(DBusConnection *conn, DBusMessage *msg,
355                         const GDBusMethodTable *method, void *iface_user_data)
356 {
357         const GDBusSecurityTable *security;
358
359         for (security = security_table; security && security->privilege;
360                                                                 security++) {
361                 struct security_data *secdata;
362                 gboolean interaction;
363
364                 if (security->privilege != method->privilege)
365                         continue;
366
367                 secdata = g_new(struct security_data, 1);
368                 secdata->pending = next_pending++;
369                 secdata->message = dbus_message_ref(msg);
370                 secdata->method = method;
371                 secdata->iface_user_data = iface_user_data;
372
373                 pending_security = g_slist_prepend(pending_security, secdata);
374
375                 if (security->flags & G_DBUS_SECURITY_FLAG_ALLOW_INTERACTION)
376                         interaction = TRUE;
377                 else
378                         interaction = FALSE;
379
380                 if (!(security->flags & G_DBUS_SECURITY_FLAG_BUILTIN) &&
381                                                         security->function)
382                         security->function(conn, security->action,
383                                                 interaction, secdata->pending);
384                 else
385                         builtin_security_function(conn, security->action,
386                                                 interaction, secdata->pending);
387
388                 return TRUE;
389         }
390
391         return FALSE;
392 }
393
394 static void generic_unregister(DBusConnection *connection, void *user_data)
395 {
396         struct generic_data *data = user_data;
397
398         g_free(data->introspect);
399         g_free(data);
400 }
401
402 static struct interface_data *find_interface(GSList *interfaces,
403                                                 const char *name)
404 {
405         GSList *list;
406
407         if (name == NULL)
408                 return NULL;
409
410         for (list = interfaces; list; list = list->next) {
411                 struct interface_data *iface = list->data;
412                 if (!strcmp(name, iface->name))
413                         return iface;
414         }
415
416         return NULL;
417 }
418
419 static DBusHandlerResult generic_message(DBusConnection *connection,
420                                         DBusMessage *message, void *user_data)
421 {
422         struct generic_data *data = user_data;
423         struct interface_data *iface;
424         const GDBusMethodTable *method;
425         const char *interface;
426
427         interface = dbus_message_get_interface(message);
428
429         iface = find_interface(data->interfaces, interface);
430         if (iface == NULL)
431                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
432
433         for (method = iface->methods; method &&
434                         method->name && method->function; method++) {
435                 if (dbus_message_is_method_call(message, iface->name,
436                                                         method->name) == FALSE)
437                         continue;
438
439                 if (dbus_message_has_signature(message,
440                                                 method->signature) == FALSE)
441                         continue;
442
443                 if (check_privilege(connection, message, method,
444                                                 iface->user_data) == TRUE)
445                         return DBUS_HANDLER_RESULT_HANDLED;
446
447                 return process_message(connection, message, method,
448                                                         iface->user_data);
449         }
450
451         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
452 }
453
454 static DBusObjectPathVTable generic_table = {
455         .unregister_function    = generic_unregister,
456         .message_function       = generic_message,
457 };
458
459 static void invalidate_parent_data(DBusConnection *conn, const char *child_path)
460 {
461         struct generic_data *data = NULL;
462         char *parent_path, *slash;
463
464         parent_path = g_strdup(child_path);
465         slash = strrchr(parent_path, '/');
466         if (slash == NULL)
467                 goto done;
468
469         if (slash == parent_path && parent_path[1] != '\0')
470                 parent_path[1] = '\0';
471         else
472                 *slash = '\0';
473
474         if (!strlen(parent_path))
475                 goto done;
476
477         if (dbus_connection_get_object_path_data(conn, parent_path,
478                                                         (void *) &data) == FALSE) {
479                 goto done;
480         }
481
482         invalidate_parent_data(conn, parent_path);
483
484         if (data == NULL)
485                 goto done;
486
487         g_free(data->introspect);
488         data->introspect = NULL;
489
490 done:
491         g_free(parent_path);
492 }
493
494 static GDBusMethodTable introspect_methods[] = {
495         { "Introspect", "",     "s", introspect },
496         { }
497 };
498
499 static void add_interface(struct generic_data *data, const char *name,
500                                 const GDBusMethodTable *methods,
501                                 const GDBusSignalTable *signals,
502                                 const GDBusPropertyTable *properties,
503                                 void *user_data,
504                                 GDBusDestroyFunction destroy)
505 {
506         struct interface_data *iface;
507
508         iface = g_new0(struct interface_data, 1);
509         iface->name = g_strdup(name);
510         iface->methods = methods;
511         iface->signals = signals;
512         iface->properties = properties;
513         iface->user_data = user_data;
514         iface->destroy = destroy;
515
516         data->interfaces = g_slist_append(data->interfaces, iface);
517 }
518
519 static struct generic_data *object_path_ref(DBusConnection *connection,
520                                                         const char *path)
521 {
522         struct generic_data *data;
523
524         if (dbus_connection_get_object_path_data(connection, path,
525                                                 (void *) &data) == TRUE) {
526                 if (data != NULL) {
527                         data->refcount++;
528                         return data;
529                 }
530         }
531
532         data = g_new0(struct generic_data, 1);
533         data->refcount = 1;
534
535         data->introspect = g_strdup(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE "<node></node>");
536
537         if (!dbus_connection_register_object_path(connection, path,
538                                                 &generic_table, data)) {
539                 g_free(data->introspect);
540                 g_free(data);
541                 return NULL;
542         }
543
544         invalidate_parent_data(connection, path);
545
546         add_interface(data, DBUS_INTERFACE_INTROSPECTABLE,
547                         introspect_methods, NULL, NULL, data, NULL);
548
549         return data;
550 }
551
552 static gboolean remove_interface(struct generic_data *data, const char *name)
553 {
554         struct interface_data *iface;
555
556         iface = find_interface(data->interfaces, name);
557         if (iface == NULL)
558                 return FALSE;
559
560         data->interfaces = g_slist_remove(data->interfaces, iface);
561
562         if (iface->destroy)
563                 iface->destroy(iface->user_data);
564
565         g_free(iface->name);
566         g_free(iface);
567
568         return TRUE;
569 }
570
571 static void object_path_unref(DBusConnection *connection, const char *path)
572 {
573         struct generic_data *data = NULL;
574
575         if (dbus_connection_get_object_path_data(connection, path,
576                                                 (void *) &data) == FALSE)
577                 return;
578
579         if (data == NULL)
580                 return;
581
582         data->refcount--;
583
584         if (data->refcount > 0)
585                 return;
586
587         remove_interface(data, DBUS_INTERFACE_INTROSPECTABLE);
588
589         invalidate_parent_data(connection, path);
590
591         dbus_connection_unregister_object_path(connection, path);
592 }
593
594 static gboolean check_signal(DBusConnection *conn, const char *path,
595                                 const char *interface, const char *name,
596                                 const char **args)
597 {
598         struct generic_data *data = NULL;
599         struct interface_data *iface;
600         const GDBusSignalTable *signal;
601
602         *args = NULL;
603         if (!dbus_connection_get_object_path_data(conn, path,
604                                         (void *) &data) || data == NULL) {
605                 error("dbus_connection_emit_signal: path %s isn't registered",
606                                 path);
607                 return FALSE;
608         }
609
610         iface = find_interface(data->interfaces, interface);
611         if (iface == NULL) {
612                 error("dbus_connection_emit_signal: %s does not implement %s",
613                                 path, interface);
614                 return FALSE;
615         }
616
617         for (signal = iface->signals; signal && signal->name; signal++) {
618                 if (!strcmp(signal->name, name)) {
619                         *args = signal->signature;
620                         break;
621                 }
622         }
623
624         if (*args == NULL) {
625                 error("No signal named %s on interface %s", name, interface);
626                 return FALSE;
627         }
628
629         return TRUE;
630 }
631
632 static dbus_bool_t emit_signal_valist(DBusConnection *conn,
633                                                 const char *path,
634                                                 const char *interface,
635                                                 const char *name,
636                                                 int first,
637                                                 va_list var_args)
638 {
639         DBusMessage *signal;
640         dbus_bool_t ret;
641         const char *signature, *args;
642
643         if (!check_signal(conn, path, interface, name, &args))
644                 return FALSE;
645
646         signal = dbus_message_new_signal(path, interface, name);
647         if (signal == NULL) {
648                 error("Unable to allocate new %s.%s signal", interface,  name);
649                 return FALSE;
650         }
651
652         ret = dbus_message_append_args_valist(signal, first, var_args);
653         if (!ret)
654                 goto fail;
655
656         signature = dbus_message_get_signature(signal);
657         if (strcmp(args, signature) != 0) {
658                 error("%s.%s: expected signature'%s' but got '%s'",
659                                 interface, name, args, signature);
660                 ret = FALSE;
661                 goto fail;
662         }
663
664         ret = dbus_connection_send(conn, signal, NULL);
665
666 fail:
667         dbus_message_unref(signal);
668
669         return ret;
670 }
671
672 gboolean g_dbus_register_interface(DBusConnection *connection,
673                                         const char *path, const char *name,
674                                         const GDBusMethodTable *methods,
675                                         const GDBusSignalTable *signals,
676                                         const GDBusPropertyTable *properties,
677                                         void *user_data,
678                                         GDBusDestroyFunction destroy)
679 {
680         struct generic_data *data;
681
682         data = object_path_ref(connection, path);
683         if (data == NULL)
684                 return FALSE;
685
686         if (find_interface(data->interfaces, name)) {
687                 object_path_unref(connection, path);
688                 return FALSE;
689         }
690
691         add_interface(data, name, methods, signals,
692                         properties, user_data, destroy);
693
694         g_free(data->introspect);
695         data->introspect = NULL;
696
697         return TRUE;
698 }
699
700 gboolean g_dbus_unregister_interface(DBusConnection *connection,
701                                         const char *path, const char *name)
702 {
703         struct generic_data *data = NULL;
704
705         if (path == NULL)
706                 return FALSE;
707
708         if (dbus_connection_get_object_path_data(connection, path,
709                                                 (void *) &data) == FALSE)
710                 return FALSE;
711
712         if (data == NULL)
713                 return FALSE;
714
715         if (remove_interface(data, name) == FALSE)
716                 return FALSE;
717
718         g_free(data->introspect);
719         data->introspect = NULL;
720
721         object_path_unref(connection, path);
722
723         return TRUE;
724 }
725
726 gboolean g_dbus_register_security(const GDBusSecurityTable *security)
727 {
728         if (security_table != NULL)
729                 return FALSE;
730
731         security_table = security;
732
733         return TRUE;
734 }
735
736 gboolean g_dbus_unregister_security(const GDBusSecurityTable *security)
737 {
738         security_table = NULL;
739
740         return TRUE;
741 }
742
743 DBusMessage *g_dbus_create_error_valist(DBusMessage *message, const char *name,
744                                         const char *format, va_list args)
745 {
746         char str[1024];
747
748         vsnprintf(str, sizeof(str), format, args);
749
750         return dbus_message_new_error(message, name, str);
751 }
752
753 DBusMessage *g_dbus_create_error(DBusMessage *message, const char *name,
754                                                 const char *format, ...)
755 {
756         va_list args;
757         DBusMessage *reply;
758
759         va_start(args, format);
760
761         reply = g_dbus_create_error_valist(message, name, format, args);
762
763         va_end(args);
764
765         return reply;
766 }
767
768 DBusMessage *g_dbus_create_reply_valist(DBusMessage *message,
769                                                 int type, va_list args)
770 {
771         DBusMessage *reply;
772
773         reply = dbus_message_new_method_return(message);
774         if (reply == NULL)
775                 return NULL;
776
777         if (dbus_message_append_args_valist(reply, type, args) == FALSE) {
778                 dbus_message_unref(reply);
779                 return NULL;
780         }
781
782         return reply;
783 }
784
785 DBusMessage *g_dbus_create_reply(DBusMessage *message, int type, ...)
786 {
787         va_list args;
788         DBusMessage *reply;
789
790         va_start(args, type);
791
792         reply = g_dbus_create_reply_valist(message, type, args);
793
794         va_end(args);
795
796         return reply;
797 }
798
799 gboolean g_dbus_send_message(DBusConnection *connection, DBusMessage *message)
800 {
801         dbus_bool_t result;
802
803         if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL)
804                 dbus_message_set_no_reply(message, TRUE);
805
806         result = dbus_connection_send(connection, message, NULL);
807
808         dbus_message_unref(message);
809
810         return result;
811 }
812
813 gboolean g_dbus_send_reply_valist(DBusConnection *connection,
814                                 DBusMessage *message, int type, va_list args)
815 {
816         DBusMessage *reply;
817
818         reply = dbus_message_new_method_return(message);
819         if (reply == NULL)
820                 return FALSE;
821
822         if (dbus_message_append_args_valist(reply, type, args) == FALSE) {
823                 dbus_message_unref(reply);
824                 return FALSE;
825         }
826
827         return g_dbus_send_message(connection, reply);
828 }
829
830 gboolean g_dbus_send_reply(DBusConnection *connection,
831                                 DBusMessage *message, int type, ...)
832 {
833         va_list args;
834         gboolean result;
835
836         va_start(args, type);
837
838         result = g_dbus_send_reply_valist(connection, message, type, args);
839
840         va_end(args);
841
842         return result;
843 }
844
845 gboolean g_dbus_emit_signal(DBusConnection *connection,
846                                 const char *path, const char *interface,
847                                 const char *name, int type, ...)
848 {
849         va_list args;
850         gboolean result;
851
852         va_start(args, type);
853
854         result = emit_signal_valist(connection, path, interface,
855                                                         name, type, args);
856
857         va_end(args);
858
859         return result;
860 }
861
862 gboolean g_dbus_emit_signal_valist(DBusConnection *connection,
863                                 const char *path, const char *interface,
864                                 const char *name, int type, va_list args)
865 {
866         return emit_signal_valist(connection, path, interface,
867                                                         name, type, args);
868 }