gdbus/object.c

   1 /*
   2  *
   3  *  D-Bus helper library
   4  *
   5  *  Copyright (C) 2004-2010  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 name=\"%s\">\n", path);
 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)
 205                 generate_introspection_xml(connection, data,
 206                                                 dbus_message_get_path(message));
 207
 208         reply = dbus_message_new_method_return(message);
 209         if (!reply)
 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                 DBusHandlerResult result;
 259
 260                 if (secdata->pending != pending)
 261                         continue;
 262
 263                 pending_security = g_slist_remove(pending_security, secdata);
 264
 265                 result = process_message(connection, secdata->message,
 266                                 secdata->method, secdata->iface_user_data);
 267
 268                 dbus_message_unref(secdata->message);
 269                 g_free(secdata);
 270                 return;
 271         }
 272 }
 273
 274 void g_dbus_pending_error_valist(DBusConnection *connection,
 275                                 GDBusPendingReply pending, const char *name,
 276                                         const char *format, va_list args)
 277 {
 278         GSList *list;
 279
 280         for (list = pending_security; list; list = list->next) {
 281                 struct security_data *secdata = list->data;
 282                 DBusMessage *reply;
 283
 284                 if (secdata->pending != pending)
 285                         continue;
 286
 287                 pending_security = g_slist_remove(pending_security, secdata);
 288
 289                 reply = g_dbus_create_error_valist(secdata->message,
 290                                                         name, format, args);
 291                 if (reply != NULL) {
 292                         dbus_connection_send(connection, reply, NULL);
 293                         dbus_message_unref(reply);
 294                 }
 295
 296                 dbus_message_unref(secdata->message);
 297                 g_free(secdata);
 298                 return;
 299         }
 300 }
 301
 302 void g_dbus_pending_error(DBusConnection *connection,
 303                                 GDBusPendingReply pending,
 304                                 const char *name, const char *format, ...)
 305 {
 306         va_list args;
 307
 308         va_start(args, format);
 309
 310         g_dbus_pending_error_valist(connection, pending, name, format, args);
 311
 312         va_end(args);
 313 }
 314
 315 static gboolean check_privilege(DBusConnection *conn, DBusMessage *msg,
 316                         const GDBusMethodTable *method, void *iface_user_data)
 317 {
 318         const GDBusSecurityTable *security;
 319
 320         for (security = security_table; security && security->privilege;
 321                                                                 security++) {
 322                 struct security_data *secdata;
 323                 gboolean interaction;
 324
 325                 if (security->privilege != method->privilege)
 326                         continue;
 327
 328                 secdata = g_new(struct security_data, 1);
 329                 secdata->pending = next_pending++;
 330                 secdata->message = dbus_message_ref(msg);
 331                 secdata->method = method;
 332                 secdata->iface_user_data = iface_user_data;
 333
 334                 pending_security = g_slist_prepend(pending_security, secdata);
 335
 336                 if (security->flags & G_DBUS_SECURITY_FLAG_ALLOW_INTERACTION)
 337                         interaction = TRUE;
 338                 else
 339                         interaction = FALSE;
 340
 341                 if (security->function)
 342                         security->function(conn, security->action,
 343                                                 interaction, secdata->pending);
 344
 345                 return TRUE;
 346         }
 347
 348         return FALSE;
 349 }
 350
 351 static void generic_unregister(DBusConnection *connection, void *user_data)
 352 {
 353         struct generic_data *data = user_data;
 354
 355         g_free(data->introspect);
 356         g_free(data);
 357 }
 358
 359 static struct interface_data *find_interface(GSList *interfaces,
 360                                                 const char *name)
 361 {
 362         GSList *list;
 363
 364         if (!name)
 365                 return NULL;
 366
 367         for (list = interfaces; list; list = list->next) {
 368                 struct interface_data *iface = list->data;
 369                 if (!strcmp(name, iface->name))
 370                         return iface;
 371         }
 372
 373         return NULL;
 374 }
 375
 376 static DBusHandlerResult generic_message(DBusConnection *connection,
 377                                         DBusMessage *message, void *user_data)
 378 {
 379         struct generic_data *data = user_data;
 380         struct interface_data *iface;
 381         const GDBusMethodTable *method;
 382         const char *interface;
 383
 384         interface = dbus_message_get_interface(message);
 385
 386         iface = find_interface(data->interfaces, interface);
 387         if (!iface)
 388                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 389
 390         for (method = iface->methods; method &&
 391                         method->name && method->function; method++) {
 392                 if (dbus_message_is_method_call(message, iface->name,
 393                                                         method->name) == FALSE)
 394                         continue;
 395
 396                 if (dbus_message_has_signature(message,
 397                                                 method->signature) == FALSE)
 398                         continue;
 399
 400                 if (check_privilege(connection, message, method,
 401                                                 iface->user_data) == TRUE)
 402                         return DBUS_HANDLER_RESULT_HANDLED;
 403
 404                 return process_message(connection, message, method,
 405                                                         iface->user_data);
 406         }
 407
 408         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 409 }
 410
 411 static DBusObjectPathVTable generic_table = {
 412         .unregister_function    = generic_unregister,
 413         .message_function       = generic_message,
 414 };
 415
 416 static void invalidate_parent_data(DBusConnection *conn, const char *child_path)
 417 {
 418         struct generic_data *data = NULL;
 419         char *parent_path, *slash;
 420
 421         parent_path = g_strdup(child_path);
 422         slash = strrchr(parent_path, '/');
 423         if (!slash)
 424                 goto done;
 425
 426         if (slash == parent_path && parent_path[1] != '\0')
 427                 parent_path[1] = '\0';
 428         else
 429                 *slash = '\0';
 430
 431         if (!strlen(parent_path))
 432                 goto done;
 433
 434         if (!dbus_connection_get_object_path_data(conn, parent_path,
 435                                                         (void *) &data)) {
 436                 invalidate_parent_data(conn, parent_path);
 437                 goto done;
 438         }
 439
 440         if (!data)
 441                 goto done;
 442
 443         g_free(data->introspect);
 444         data->introspect = NULL;
 445
 446 done:
 447         g_free(parent_path);
 448 }
 449
 450 static GDBusMethodTable introspect_methods[] = {
 451         { "Introspect", "",     "s", introspect },
 452         { }
 453 };
 454
 455 static void add_interface(struct generic_data *data, const char *name,
 456                                 const GDBusMethodTable *methods,
 457                                 const GDBusSignalTable *signals,
 458                                 const GDBusPropertyTable *properties,
 459                                 void *user_data,
 460                                 GDBusDestroyFunction destroy)
 461 {
 462         struct interface_data *iface;
 463
 464         iface = g_new0(struct interface_data, 1);
 465         iface->name = g_strdup(name);
 466         iface->methods = methods;
 467         iface->signals = signals;
 468         iface->properties = properties;
 469         iface->user_data = user_data;
 470         iface->destroy = destroy;
 471
 472         data->interfaces = g_slist_append(data->interfaces, iface);
 473 }
 474
 475 static struct generic_data *object_path_ref(DBusConnection *connection,
 476                                                         const char *path)
 477 {
 478         struct generic_data *data;
 479
 480         if (dbus_connection_get_object_path_data(connection, path,
 481                                                 (void *) &data) == TRUE) {
 482                 if (data != NULL) {
 483                         data->refcount++;
 484                         return data;
 485                 }
 486         }
 487
 488         data = g_new0(struct generic_data, 1);
 489         data->refcount = 1;
 490
 491         data->introspect = g_strdup(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE "<node></node>");
 492
 493         if (!dbus_connection_register_object_path(connection, path,
 494                                                 &generic_table, data)) {
 495                 g_free(data->introspect);
 496                 g_free(data);
 497                 return NULL;
 498         }
 499
 500         invalidate_parent_data(connection, path);
 501
 502         add_interface(data, DBUS_INTERFACE_INTROSPECTABLE,
 503                         introspect_methods, NULL, NULL, data, NULL);
 504
 505         return data;
 506 }
 507
 508 static gboolean remove_interface(struct generic_data *data, const char *name)
 509 {
 510         struct interface_data *iface;
 511
 512         iface = find_interface(data->interfaces, name);
 513         if (!iface)
 514                 return FALSE;
 515
 516         data->interfaces = g_slist_remove(data->interfaces, iface);
 517
 518         if (iface->destroy)
 519                 iface->destroy(iface->user_data);
 520
 521         g_free(iface->name);
 522         g_free(iface);
 523
 524         return TRUE;
 525 }
 526
 527 static void object_path_unref(DBusConnection *connection, const char *path)
 528 {
 529         struct generic_data *data = NULL;
 530
 531         if (dbus_connection_get_object_path_data(connection, path,
 532                                                 (void *) &data) == FALSE)
 533                 return;
 534
 535         if (data == NULL)
 536                 return;
 537
 538         data->refcount--;
 539
 540         if (data->refcount > 0)
 541                 return;
 542
 543         remove_interface(data, DBUS_INTERFACE_INTROSPECTABLE);
 544
 545         invalidate_parent_data(connection, path);
 546
 547         dbus_connection_unregister_object_path(connection, path);
 548 }
 549
 550 static gboolean check_signal(DBusConnection *conn, const char *path,
 551                                 const char *interface, const char *name,
 552                                 const char **args)
 553 {
 554         struct generic_data *data = NULL;
 555         struct interface_data *iface;
 556         const GDBusSignalTable *signal;
 557
 558         *args = NULL;
 559         if (!dbus_connection_get_object_path_data(conn, path,
 560                                         (void *) &data) || !data) {
 561                 error("dbus_connection_emit_signal: path %s isn't registered",
 562                                 path);
 563                 return FALSE;
 564         }
 565
 566         iface = find_interface(data->interfaces, interface);
 567         if (!iface) {
 568                 error("dbus_connection_emit_signal: %s does not implement %s",
 569                                 path, interface);
 570                 return FALSE;
 571         }
 572
 573         for (signal = iface->signals; signal && signal->name; signal++) {
 574                 if (!strcmp(signal->name, name)) {
 575                         *args = signal->signature;
 576                         break;
 577                 }
 578         }
 579
 580         if (!*args) {
 581                 error("No signal named %s on interface %s", name, interface);
 582                 return FALSE;
 583         }
 584
 585         return TRUE;
 586 }
 587
 588 static dbus_bool_t emit_signal_valist(DBusConnection *conn,
 589                                                 const char *path,
 590                                                 const char *interface,
 591                                                 const char *name,
 592                                                 int first,
 593                                                 va_list var_args)
 594 {
 595         DBusMessage *signal;
 596         dbus_bool_t ret;
 597         const char *signature, *args;
 598
 599         if (!check_signal(conn, path, interface, name, &args))
 600                 return FALSE;
 601
 602         signal = dbus_message_new_signal(path, interface, name);
 603         if (!signal) {
 604                 error("Unable to allocate new %s.%s signal", interface,  name);
 605                 return FALSE;
 606         }
 607
 608         ret = dbus_message_append_args_valist(signal, first, var_args);
 609         if (!ret)
 610                 goto fail;
 611
 612         signature = dbus_message_get_signature(signal);
 613         if (strcmp(args, signature) != 0) {
 614                 error("%s.%s: expected signature'%s' but got '%s'",
 615                                 interface, name, args, signature);
 616                 ret = FALSE;
 617                 goto fail;
 618         }
 619
 620         ret = dbus_connection_send(conn, signal, NULL);
 621
 622 fail:
 623         dbus_message_unref(signal);
 624
 625         return ret;
 626 }
 627
 628 gboolean g_dbus_register_interface(DBusConnection *connection,
 629                                         const char *path, const char *name,
 630                                         const GDBusMethodTable *methods,
 631                                         const GDBusSignalTable *signals,
 632                                         const GDBusPropertyTable *properties,
 633                                         void *user_data,
 634                                         GDBusDestroyFunction destroy)
 635 {
 636         struct generic_data *data;
 637
 638         data = object_path_ref(connection, path);
 639         if (data == NULL)
 640                 return FALSE;
 641
 642         if (find_interface(data->interfaces, name)) {
 643                 object_path_unref(connection, path);
 644                 return FALSE;
 645         }
 646
 647         add_interface(data, name, methods, signals,
 648                         properties, user_data, destroy);
 649
 650         g_free(data->introspect);
 651         data->introspect = NULL;
 652
 653         return TRUE;
 654 }
 655
 656 gboolean g_dbus_unregister_interface(DBusConnection *connection,
 657                                         const char *path, const char *name)
 658 {
 659         struct generic_data *data = NULL;
 660
 661         if (!path)
 662                 return FALSE;
 663
 664         if (dbus_connection_get_object_path_data(connection, path,
 665                                                 (void *) &data) == FALSE)
 666                 return FALSE;
 667
 668         if (data == NULL)
 669                 return FALSE;
 670
 671         if (remove_interface(data, name) == FALSE)
 672                 return FALSE;
 673
 674         g_free(data->introspect);
 675         data->introspect = NULL;
 676
 677         object_path_unref(connection, path);
 678
 679         return TRUE;
 680 }
 681
 682 gboolean g_dbus_register_security(const GDBusSecurityTable *security)
 683 {
 684         if (security_table != NULL)
 685                 return FALSE;
 686
 687         security_table = security;
 688
 689         return TRUE;
 690 }
 691
 692 gboolean g_dbus_unregister_security(const GDBusSecurityTable *security)
 693 {
 694         security_table = NULL;
 695
 696         return TRUE;
 697 }
 698
 699 DBusMessage *g_dbus_create_error_valist(DBusMessage *message, const char *name,
 700                                         const char *format, va_list args)
 701 {
 702         char str[1024];
 703
 704         vsnprintf(str, sizeof(str), format, args);
 705
 706         return dbus_message_new_error(message, name, str);
 707 }
 708
 709 DBusMessage *g_dbus_create_error(DBusMessage *message, const char *name,
 710                                                 const char *format, ...)
 711 {
 712         va_list args;
 713         DBusMessage *reply;
 714
 715         va_start(args, format);
 716
 717         reply = g_dbus_create_error_valist(message, name, format, args);
 718
 719         va_end(args);
 720
 721         return reply;
 722 }
 723
 724 DBusMessage *g_dbus_create_reply_valist(DBusMessage *message,
 725                                                 int type, va_list args)
 726 {
 727         DBusMessage *reply;
 728
 729         reply = dbus_message_new_method_return(message);
 730         if (reply == NULL)
 731                 return NULL;
 732
 733         if (dbus_message_append_args_valist(reply, type, args) == FALSE) {
 734                 dbus_message_unref(reply);
 735                 return NULL;
 736         }
 737
 738         return reply;
 739 }
 740
 741 DBusMessage *g_dbus_create_reply(DBusMessage *message, int type, ...)
 742 {
 743         va_list args;
 744         DBusMessage *reply;
 745
 746         va_start(args, type);
 747
 748         reply = g_dbus_create_reply_valist(message, type, args);
 749
 750         va_end(args);
 751
 752         return reply;
 753 }
 754
 755 gboolean g_dbus_send_message(DBusConnection *connection, DBusMessage *message)
 756 {
 757         dbus_bool_t result;
 758
 759         if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL)
 760                 dbus_message_set_no_reply(message, TRUE);
 761
 762         result = dbus_connection_send(connection, message, NULL);
 763
 764         dbus_message_unref(message);
 765
 766         return result;
 767 }
 768
 769 gboolean g_dbus_send_reply_valist(DBusConnection *connection,
 770                                 DBusMessage *message, int type, va_list args)
 771 {
 772         DBusMessage *reply;
 773
 774         reply = dbus_message_new_method_return(message);
 775         if (reply == NULL)
 776                 return FALSE;
 777
 778         if (dbus_message_append_args_valist(reply, type, args) == FALSE) {
 779                 dbus_message_unref(reply);
 780                 return FALSE;
 781         }
 782
 783         return g_dbus_send_message(connection, reply);
 784 }
 785
 786 gboolean g_dbus_send_reply(DBusConnection *connection,
 787                                 DBusMessage *message, int type, ...)
 788 {
 789         va_list args;
 790         gboolean result;
 791
 792         va_start(args, type);
 793
 794         result = g_dbus_send_reply_valist(connection, message, type, args);
 795
 796         va_end(args);
 797
 798         return result;
 799 }
 800
 801 gboolean g_dbus_emit_signal(DBusConnection *connection,
 802                                 const char *path, const char *interface,
 803                                 const char *name, int type, ...)
 804 {
 805         va_list args;
 806         gboolean result;
 807
 808         va_start(args, type);
 809
 810         result = emit_signal_valist(connection, path, interface,
 811                                                         name, type, args);
 812
 813         va_end(args);
 814
 815         return result;
 816 }
 817
 818 gboolean g_dbus_emit_signal_valist(DBusConnection *connection,
 819                                 const char *path, const char *interface,
 820                                 const char *name, int type, va_list args)
 821 {
 822         return emit_signal_valist(connection, path, interface,
 823                                                         name, type, args);
 824 }