Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ |
| 2 | /* services.c Service management |
| 3 | * |
| 4 | * Copyright (C) 2003 Red Hat, Inc. |
| 5 | * Copyright (C) 2003 CodeFactory AB |
| 6 | * |
| 7 | * Licensed under the Academic Free License version 2.1 |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <config.h> |
| 26 | #include <dbus/dbus-hash.h> |
| 27 | #include <dbus/dbus-list.h> |
| 28 | #include <dbus/dbus-mempool.h> |
| 29 | #include <dbus/dbus-marshal-validate.h> |
| 30 | |
| 31 | #include "driver.h" |
| 32 | #include "services.h" |
| 33 | #include "connection.h" |
| 34 | #include "utils.h" |
| 35 | #include "activation.h" |
| 36 | #include "policy.h" |
| 37 | #include "bus.h" |
| 38 | #include "selinux.h" |
| 39 | |
| 40 | struct BusService |
| 41 | { |
| 42 | int refcount; |
| 43 | |
| 44 | BusRegistry *registry; |
| 45 | char *name; |
| 46 | DBusList *owners; |
| 47 | }; |
| 48 | |
| 49 | struct BusOwner |
| 50 | { |
| 51 | int refcount; |
| 52 | |
| 53 | BusService *service; |
| 54 | DBusConnection *conn; |
| 55 | |
| 56 | unsigned int allow_replacement : 1; |
| 57 | unsigned int do_not_queue : 1; |
| 58 | }; |
| 59 | |
| 60 | struct BusRegistry |
| 61 | { |
| 62 | int refcount; |
| 63 | |
| 64 | BusContext *context; |
| 65 | |
| 66 | DBusHashTable *service_hash; |
| 67 | DBusMemPool *service_pool; |
| 68 | DBusMemPool *owner_pool; |
| 69 | |
| 70 | DBusHashTable *service_sid_table; |
| 71 | }; |
| 72 | |
| 73 | BusRegistry* |
| 74 | bus_registry_new (BusContext *context) |
| 75 | { |
| 76 | BusRegistry *registry; |
| 77 | |
| 78 | registry = dbus_new0 (BusRegistry, 1); |
| 79 | if (registry == NULL) |
| 80 | return NULL; |
| 81 | |
| 82 | registry->refcount = 1; |
| 83 | registry->context = context; |
| 84 | |
| 85 | registry->service_hash = _dbus_hash_table_new (DBUS_HASH_STRING, |
| 86 | NULL, NULL); |
| 87 | if (registry->service_hash == NULL) |
| 88 | goto failed; |
| 89 | |
| 90 | registry->service_pool = _dbus_mem_pool_new (sizeof (BusService), |
| 91 | TRUE); |
| 92 | |
| 93 | if (registry->service_pool == NULL) |
| 94 | goto failed; |
| 95 | |
| 96 | registry->owner_pool = _dbus_mem_pool_new (sizeof (BusOwner), |
| 97 | TRUE); |
| 98 | |
| 99 | if (registry->owner_pool == NULL) |
| 100 | goto failed; |
| 101 | |
| 102 | registry->service_sid_table = NULL; |
| 103 | |
| 104 | return registry; |
| 105 | |
| 106 | failed: |
| 107 | bus_registry_unref (registry); |
| 108 | return NULL; |
| 109 | } |
| 110 | |
| 111 | BusRegistry * |
| 112 | bus_registry_ref (BusRegistry *registry) |
| 113 | { |
| 114 | _dbus_assert (registry->refcount > 0); |
| 115 | registry->refcount += 1; |
| 116 | |
| 117 | return registry; |
| 118 | } |
| 119 | |
| 120 | void |
| 121 | bus_registry_unref (BusRegistry *registry) |
| 122 | { |
| 123 | _dbus_assert (registry->refcount > 0); |
| 124 | registry->refcount -= 1; |
| 125 | |
| 126 | if (registry->refcount == 0) |
| 127 | { |
| 128 | if (registry->service_hash) |
| 129 | _dbus_hash_table_unref (registry->service_hash); |
| 130 | if (registry->service_pool) |
| 131 | _dbus_mem_pool_free (registry->service_pool); |
| 132 | if (registry->owner_pool) |
| 133 | _dbus_mem_pool_free (registry->owner_pool); |
| 134 | if (registry->service_sid_table) |
| 135 | _dbus_hash_table_unref (registry->service_sid_table); |
| 136 | |
| 137 | dbus_free (registry); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | BusService* |
| 142 | bus_registry_lookup (BusRegistry *registry, |
| 143 | const DBusString *service_name) |
| 144 | { |
| 145 | BusService *service; |
| 146 | |
| 147 | service = _dbus_hash_table_lookup_string (registry->service_hash, |
| 148 | _dbus_string_get_const_data (service_name)); |
| 149 | |
| 150 | return service; |
| 151 | } |
| 152 | |
| 153 | static DBusList * |
| 154 | _bus_service_find_owner_link (BusService *service, |
| 155 | DBusConnection *connection) |
| 156 | { |
| 157 | DBusList *link; |
| 158 | |
| 159 | link = _dbus_list_get_first_link (&service->owners); |
| 160 | |
| 161 | while (link != NULL) |
| 162 | { |
| 163 | BusOwner *bus_owner; |
| 164 | |
| 165 | bus_owner = (BusOwner *) link->data; |
| 166 | if (bus_owner->conn == connection) |
| 167 | break; |
| 168 | |
| 169 | link = _dbus_list_get_next_link (&service->owners, link); |
| 170 | } |
| 171 | |
| 172 | return link; |
| 173 | } |
| 174 | |
| 175 | static void |
| 176 | bus_owner_set_flags (BusOwner *owner, |
| 177 | dbus_uint32_t flags) |
| 178 | { |
| 179 | owner->allow_replacement = |
| 180 | (flags & DBUS_NAME_FLAG_ALLOW_REPLACEMENT) != FALSE; |
| 181 | |
| 182 | owner->do_not_queue = |
| 183 | (flags & DBUS_NAME_FLAG_DO_NOT_QUEUE) != FALSE; |
| 184 | } |
| 185 | |
| 186 | static BusOwner * |
| 187 | bus_owner_new (BusService *service, |
| 188 | DBusConnection *conn, |
| 189 | dbus_uint32_t flags) |
| 190 | { |
| 191 | BusOwner *result; |
| 192 | |
| 193 | result = _dbus_mem_pool_alloc (service->registry->owner_pool); |
| 194 | if (result != NULL) |
| 195 | { |
| 196 | result->refcount = 1; |
| 197 | /* don't ref the connection because we don't want |
| 198 | to block the connection from going away. |
| 199 | transactions take care of reffing the connection |
| 200 | but we need to use refcounting on the owner |
| 201 | so that the owner does not get freed before |
| 202 | we can deref the connection in the transaction |
| 203 | */ |
| 204 | result->conn = conn; |
| 205 | result->service = service; |
| 206 | |
| 207 | if (!bus_connection_add_owned_service (conn, service)) |
| 208 | { |
| 209 | _dbus_mem_pool_dealloc (service->registry->owner_pool, result); |
| 210 | return NULL; |
| 211 | } |
| 212 | |
| 213 | bus_owner_set_flags (result, flags); |
| 214 | } |
| 215 | return result; |
| 216 | } |
| 217 | |
| 218 | static BusOwner * |
| 219 | bus_owner_ref (BusOwner *owner) |
| 220 | { |
| 221 | _dbus_assert (owner->refcount > 0); |
| 222 | owner->refcount += 1; |
| 223 | |
| 224 | return owner; |
| 225 | } |
| 226 | |
| 227 | static void |
| 228 | bus_owner_unref (BusOwner *owner) |
| 229 | { |
| 230 | _dbus_assert (owner->refcount > 0); |
| 231 | owner->refcount -= 1; |
| 232 | |
| 233 | if (owner->refcount == 0) |
| 234 | { |
| 235 | bus_connection_remove_owned_service (owner->conn, owner->service); |
| 236 | _dbus_mem_pool_dealloc (owner->service->registry->owner_pool, owner); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | BusService* |
| 241 | bus_registry_ensure (BusRegistry *registry, |
| 242 | const DBusString *service_name, |
| 243 | DBusConnection *owner_connection_if_created, |
| 244 | dbus_uint32_t flags, |
| 245 | BusTransaction *transaction, |
| 246 | DBusError *error) |
| 247 | { |
| 248 | BusService *service; |
| 249 | |
| 250 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 251 | |
| 252 | _dbus_assert (owner_connection_if_created != NULL); |
| 253 | _dbus_assert (transaction != NULL); |
| 254 | |
| 255 | service = _dbus_hash_table_lookup_string (registry->service_hash, |
| 256 | _dbus_string_get_const_data (service_name)); |
| 257 | if (service != NULL) |
| 258 | return service; |
| 259 | |
| 260 | service = _dbus_mem_pool_alloc (registry->service_pool); |
| 261 | if (service == NULL) |
| 262 | { |
| 263 | BUS_SET_OOM (error); |
| 264 | return NULL; |
| 265 | } |
| 266 | |
| 267 | service->registry = registry; |
| 268 | service->refcount = 1; |
| 269 | |
| 270 | _dbus_verbose ("copying string %p '%s' to service->name\n", |
| 271 | service_name, _dbus_string_get_const_data (service_name)); |
| 272 | if (!_dbus_string_copy_data (service_name, &service->name)) |
| 273 | { |
| 274 | _dbus_mem_pool_dealloc (registry->service_pool, service); |
| 275 | BUS_SET_OOM (error); |
| 276 | return NULL; |
| 277 | } |
| 278 | _dbus_verbose ("copied string %p '%s' to '%s'\n", |
| 279 | service_name, _dbus_string_get_const_data (service_name), |
| 280 | service->name); |
| 281 | |
| 282 | if (!bus_driver_send_service_owner_changed (service->name, |
| 283 | NULL, |
| 284 | bus_connection_get_name (owner_connection_if_created), |
| 285 | transaction, error)) |
| 286 | { |
| 287 | bus_service_unref (service); |
| 288 | return NULL; |
| 289 | } |
| 290 | |
| 291 | if (!bus_activation_service_created (bus_context_get_activation (registry->context), |
| 292 | service->name, transaction, error)) |
| 293 | { |
| 294 | bus_service_unref (service); |
| 295 | return NULL; |
| 296 | } |
| 297 | |
| 298 | if (!bus_service_add_owner (service, owner_connection_if_created, flags, |
| 299 | transaction, error)) |
| 300 | { |
| 301 | bus_service_unref (service); |
| 302 | return NULL; |
| 303 | } |
| 304 | |
| 305 | if (!_dbus_hash_table_insert_string (registry->service_hash, |
| 306 | service->name, |
| 307 | service)) |
| 308 | { |
| 309 | /* The add_owner gets reverted on transaction cancel */ |
| 310 | BUS_SET_OOM (error); |
| 311 | return NULL; |
| 312 | } |
| 313 | |
| 314 | return service; |
| 315 | } |
| 316 | |
| 317 | void |
| 318 | bus_registry_foreach (BusRegistry *registry, |
| 319 | BusServiceForeachFunction function, |
| 320 | void *data) |
| 321 | { |
| 322 | DBusHashIter iter; |
| 323 | |
| 324 | _dbus_hash_iter_init (registry->service_hash, &iter); |
| 325 | while (_dbus_hash_iter_next (&iter)) |
| 326 | { |
| 327 | BusService *service = _dbus_hash_iter_get_value (&iter); |
| 328 | |
| 329 | (* function) (service, data); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | dbus_bool_t |
| 334 | bus_registry_list_services (BusRegistry *registry, |
| 335 | char ***listp, |
| 336 | int *array_len) |
| 337 | { |
| 338 | int i, j, len; |
| 339 | char **retval; |
| 340 | DBusHashIter iter; |
| 341 | |
| 342 | len = _dbus_hash_table_get_n_entries (registry->service_hash); |
| 343 | retval = dbus_new (char *, len + 1); |
| 344 | |
| 345 | if (retval == NULL) |
| 346 | return FALSE; |
| 347 | |
| 348 | _dbus_hash_iter_init (registry->service_hash, &iter); |
| 349 | i = 0; |
| 350 | while (_dbus_hash_iter_next (&iter)) |
| 351 | { |
| 352 | BusService *service = _dbus_hash_iter_get_value (&iter); |
| 353 | |
| 354 | retval[i] = _dbus_strdup (service->name); |
| 355 | if (retval[i] == NULL) |
| 356 | goto error; |
| 357 | |
| 358 | i++; |
| 359 | } |
| 360 | |
| 361 | retval[i] = NULL; |
| 362 | |
| 363 | if (array_len) |
| 364 | *array_len = len; |
| 365 | |
| 366 | *listp = retval; |
| 367 | return TRUE; |
| 368 | |
| 369 | error: |
| 370 | for (j = 0; j < i; j++) |
| 371 | dbus_free (retval[i]); |
| 372 | dbus_free (retval); |
| 373 | |
| 374 | return FALSE; |
| 375 | } |
| 376 | |
| 377 | dbus_bool_t |
| 378 | bus_registry_acquire_service (BusRegistry *registry, |
| 379 | DBusConnection *connection, |
| 380 | const DBusString *service_name, |
| 381 | dbus_uint32_t flags, |
| 382 | dbus_uint32_t *result, |
| 383 | BusTransaction *transaction, |
| 384 | DBusError *error) |
| 385 | { |
| 386 | dbus_bool_t retval; |
| 387 | DBusConnection *old_owner_conn; |
| 388 | DBusConnection *current_owner_conn; |
| 389 | BusClientPolicy *policy; |
| 390 | BusService *service; |
| 391 | BusActivation *activation; |
| 392 | BusSELinuxID *sid; |
| 393 | BusOwner *primary_owner; |
| 394 | |
| 395 | retval = FALSE; |
| 396 | |
| 397 | if (!_dbus_validate_bus_name (service_name, 0, |
| 398 | _dbus_string_get_length (service_name))) |
| 399 | { |
| 400 | dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| 401 | "Requested bus name \"%s\" is not valid", |
| 402 | _dbus_string_get_const_data (service_name)); |
| 403 | |
| 404 | _dbus_verbose ("Attempt to acquire invalid service name\n"); |
| 405 | |
| 406 | goto out; |
| 407 | } |
| 408 | |
| 409 | if (_dbus_string_get_byte (service_name, 0) == ':') |
| 410 | { |
| 411 | /* Not allowed; only base services can start with ':' */ |
| 412 | dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| 413 | "Cannot acquire a service starting with ':' such as \"%s\"", |
| 414 | _dbus_string_get_const_data (service_name)); |
| 415 | |
| 416 | _dbus_verbose ("Attempt to acquire invalid base service name \"%s\"", |
| 417 | _dbus_string_get_const_data (service_name)); |
| 418 | |
| 419 | goto out; |
| 420 | } |
| 421 | |
| 422 | if (_dbus_string_equal_c_str (service_name, DBUS_SERVICE_DBUS)) |
| 423 | { |
| 424 | dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| 425 | "Connection \"%s\" is not allowed to own the service \"%s\"because " |
| 426 | "it is reserved for D-Bus' use only", |
| 427 | bus_connection_is_active (connection) ? |
| 428 | bus_connection_get_name (connection) : |
| 429 | "(inactive)", |
| 430 | DBUS_SERVICE_DBUS); |
| 431 | goto out; |
| 432 | } |
| 433 | |
| 434 | policy = bus_connection_get_policy (connection); |
| 435 | _dbus_assert (policy != NULL); |
| 436 | |
| 437 | /* Note that if sid is #NULL then the bus's own context gets used |
| 438 | * in bus_connection_selinux_allows_acquire_service() |
| 439 | */ |
| 440 | sid = bus_selinux_id_table_lookup (registry->service_sid_table, |
| 441 | service_name); |
| 442 | |
| 443 | if (!bus_selinux_allows_acquire_service (connection, sid, |
| 444 | _dbus_string_get_const_data (service_name), error)) |
| 445 | { |
| 446 | |
| 447 | if (dbus_error_is_set (error) && |
| 448 | dbus_error_has_name (error, DBUS_ERROR_NO_MEMORY)) |
| 449 | { |
| 450 | goto out; |
| 451 | } |
| 452 | |
| 453 | dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, |
| 454 | "Connection \"%s\" is not allowed to own the service \"%s\" due " |
| 455 | "to SELinux policy", |
| 456 | bus_connection_is_active (connection) ? |
| 457 | bus_connection_get_name (connection) : |
| 458 | "(inactive)", |
| 459 | _dbus_string_get_const_data (service_name)); |
| 460 | goto out; |
| 461 | } |
| 462 | |
| 463 | if (!bus_client_policy_check_can_own (policy, connection, |
| 464 | service_name)) |
| 465 | { |
| 466 | dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, |
| 467 | "Connection \"%s\" is not allowed to own the service \"%s\" due " |
| 468 | "to security policies in the configuration file", |
| 469 | bus_connection_is_active (connection) ? |
| 470 | bus_connection_get_name (connection) : |
| 471 | "(inactive)", |
| 472 | _dbus_string_get_const_data (service_name)); |
| 473 | goto out; |
| 474 | } |
| 475 | |
| 476 | if (bus_connection_get_n_services_owned (connection) >= |
| 477 | bus_context_get_max_services_per_connection (registry->context)) |
| 478 | { |
| 479 | dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED, |
| 480 | "Connection \"%s\" is not allowed to own more services " |
| 481 | "(increase limits in configuration file if required)", |
| 482 | bus_connection_is_active (connection) ? |
| 483 | bus_connection_get_name (connection) : |
| 484 | "(inactive)"); |
| 485 | goto out; |
| 486 | } |
| 487 | |
| 488 | service = bus_registry_lookup (registry, service_name); |
| 489 | |
| 490 | if (service != NULL) |
| 491 | { |
| 492 | primary_owner = bus_service_get_primary_owner (service); |
| 493 | if (primary_owner != NULL) |
| 494 | old_owner_conn = primary_owner->conn; |
| 495 | else |
| 496 | old_owner_conn = NULL; |
| 497 | } |
| 498 | else |
| 499 | old_owner_conn = NULL; |
| 500 | |
| 501 | if (service == NULL) |
| 502 | { |
| 503 | service = bus_registry_ensure (registry, |
| 504 | service_name, connection, flags, |
| 505 | transaction, error); |
| 506 | if (service == NULL) |
| 507 | goto out; |
| 508 | } |
| 509 | |
| 510 | primary_owner = bus_service_get_primary_owner (service); |
| 511 | if (primary_owner == NULL) |
| 512 | goto out; |
| 513 | |
| 514 | current_owner_conn = primary_owner->conn; |
| 515 | |
| 516 | if (old_owner_conn == NULL) |
| 517 | { |
| 518 | _dbus_assert (current_owner_conn == connection); |
| 519 | |
| 520 | *result = DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER; |
| 521 | } |
| 522 | else if (old_owner_conn == connection) |
| 523 | { |
| 524 | bus_owner_set_flags (primary_owner, flags); |
| 525 | *result = DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER; |
| 526 | } |
| 527 | else if (((flags & DBUS_NAME_FLAG_DO_NOT_QUEUE) && |
| 528 | !(bus_service_get_allow_replacement (service))) || |
| 529 | ((flags & DBUS_NAME_FLAG_DO_NOT_QUEUE) && |
| 530 | !(flags & DBUS_NAME_FLAG_REPLACE_EXISTING))) |
| 531 | { |
| 532 | DBusList *link; |
| 533 | BusOwner *temp_owner; |
| 534 | /* Since we can't be queued if we are already in the queue |
| 535 | remove us */ |
| 536 | |
| 537 | link = _bus_service_find_owner_link (service, connection); |
| 538 | if (link != NULL) |
| 539 | { |
| 540 | _dbus_list_unlink (&service->owners, link); |
| 541 | temp_owner = (BusOwner *)link->data; |
| 542 | bus_owner_unref (temp_owner); |
| 543 | _dbus_list_free_link (link); |
| 544 | } |
| 545 | |
| 546 | *result = DBUS_REQUEST_NAME_REPLY_EXISTS; |
| 547 | } |
| 548 | else if (!(flags & DBUS_NAME_FLAG_DO_NOT_QUEUE) && |
| 549 | (!(flags & DBUS_NAME_FLAG_REPLACE_EXISTING) || |
| 550 | !(bus_service_get_allow_replacement (service)))) |
| 551 | { |
| 552 | /* Queue the connection */ |
| 553 | if (!bus_service_add_owner (service, connection, |
| 554 | flags, |
| 555 | transaction, error)) |
| 556 | goto out; |
| 557 | |
| 558 | *result = DBUS_REQUEST_NAME_REPLY_IN_QUEUE; |
| 559 | } |
| 560 | else |
| 561 | { |
| 562 | /* Replace the current owner */ |
| 563 | |
| 564 | /* We enqueue the new owner and remove the first one because |
| 565 | * that will cause NameAcquired and NameLost messages to |
| 566 | * be sent. |
| 567 | */ |
| 568 | |
| 569 | if (!bus_service_add_owner (service, connection, |
| 570 | flags, |
| 571 | transaction, error)) |
| 572 | goto out; |
| 573 | |
| 574 | if (primary_owner->do_not_queue) |
| 575 | { |
| 576 | if (!bus_service_remove_owner (service, old_owner_conn, |
| 577 | transaction, error)) |
| 578 | goto out; |
| 579 | } |
| 580 | else |
| 581 | { |
| 582 | if (!bus_service_swap_owner (service, old_owner_conn, |
| 583 | transaction, error)) |
| 584 | goto out; |
| 585 | } |
| 586 | |
| 587 | |
| 588 | _dbus_assert (connection == bus_service_get_primary_owner (service)->conn); |
| 589 | *result = DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER; |
| 590 | } |
| 591 | |
| 592 | activation = bus_context_get_activation (registry->context); |
| 593 | retval = bus_activation_send_pending_auto_activation_messages (activation, |
| 594 | service, |
| 595 | transaction, |
| 596 | error); |
| 597 | |
| 598 | out: |
| 599 | return retval; |
| 600 | } |
| 601 | |
| 602 | dbus_bool_t |
| 603 | bus_registry_release_service (BusRegistry *registry, |
| 604 | DBusConnection *connection, |
| 605 | const DBusString *service_name, |
| 606 | dbus_uint32_t *result, |
| 607 | BusTransaction *transaction, |
| 608 | DBusError *error) |
| 609 | { |
| 610 | dbus_bool_t retval; |
| 611 | BusService *service; |
| 612 | |
| 613 | retval = FALSE; |
| 614 | |
| 615 | if (!_dbus_validate_bus_name (service_name, 0, |
| 616 | _dbus_string_get_length (service_name))) |
| 617 | { |
| 618 | dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| 619 | "Given bus name \"%s\" is not valid", |
| 620 | _dbus_string_get_const_data (service_name)); |
| 621 | |
| 622 | _dbus_verbose ("Attempt to release invalid service name\n"); |
| 623 | |
| 624 | goto out; |
| 625 | } |
| 626 | |
| 627 | if (_dbus_string_get_byte (service_name, 0) == ':') |
| 628 | { |
| 629 | /* Not allowed; the base service name cannot be created or released */ |
| 630 | dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| 631 | "Cannot release a service starting with ':' such as \"%s\"", |
| 632 | _dbus_string_get_const_data (service_name)); |
| 633 | |
| 634 | _dbus_verbose ("Attempt to release invalid base service name \"%s\"", |
| 635 | _dbus_string_get_const_data (service_name)); |
| 636 | |
| 637 | goto out; |
| 638 | } |
| 639 | |
| 640 | if (_dbus_string_equal_c_str (service_name, DBUS_SERVICE_DBUS)) |
| 641 | { |
| 642 | /* Not allowed; the base service name cannot be created or released */ |
| 643 | dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| 644 | "Cannot release the %s service because it is owned by the bus", |
| 645 | DBUS_SERVICE_DBUS); |
| 646 | |
| 647 | _dbus_verbose ("Attempt to release service name \"%s\"", |
| 648 | DBUS_SERVICE_DBUS); |
| 649 | |
| 650 | goto out; |
| 651 | } |
| 652 | |
| 653 | service = bus_registry_lookup (registry, service_name); |
| 654 | |
| 655 | if (service == NULL) |
| 656 | { |
| 657 | *result = DBUS_RELEASE_NAME_REPLY_NON_EXISTENT; |
| 658 | } |
| 659 | else if (!bus_service_has_owner (service, connection)) |
| 660 | { |
| 661 | *result = DBUS_RELEASE_NAME_REPLY_NOT_OWNER; |
| 662 | } |
| 663 | else |
| 664 | { |
| 665 | if (!bus_service_remove_owner (service, connection, |
| 666 | transaction, error)) |
| 667 | goto out; |
| 668 | |
| 669 | _dbus_assert (!bus_service_has_owner (service, connection)); |
| 670 | *result = DBUS_RELEASE_NAME_REPLY_RELEASED; |
| 671 | } |
| 672 | |
| 673 | retval = TRUE; |
| 674 | |
| 675 | out: |
| 676 | return retval; |
| 677 | } |
| 678 | |
| 679 | dbus_bool_t |
| 680 | bus_registry_set_service_context_table (BusRegistry *registry, |
| 681 | DBusHashTable *table) |
| 682 | { |
| 683 | DBusHashTable *new_table; |
| 684 | DBusHashIter iter; |
| 685 | |
| 686 | new_table = bus_selinux_id_table_new (); |
| 687 | if (!new_table) |
| 688 | return FALSE; |
| 689 | |
| 690 | _dbus_hash_iter_init (table, &iter); |
| 691 | while (_dbus_hash_iter_next (&iter)) |
| 692 | { |
| 693 | const char *service = _dbus_hash_iter_get_string_key (&iter); |
| 694 | const char *context = _dbus_hash_iter_get_value (&iter); |
| 695 | |
| 696 | if (!bus_selinux_id_table_insert (new_table, |
| 697 | service, |
| 698 | context)) |
| 699 | return FALSE; |
| 700 | } |
| 701 | |
| 702 | if (registry->service_sid_table) |
| 703 | _dbus_hash_table_unref (registry->service_sid_table); |
| 704 | registry->service_sid_table = new_table; |
| 705 | return TRUE; |
| 706 | } |
| 707 | |
| 708 | static void |
| 709 | bus_service_unlink_owner (BusService *service, |
| 710 | BusOwner *owner) |
| 711 | { |
| 712 | _dbus_list_remove_last (&service->owners, owner); |
| 713 | bus_owner_unref (owner); |
| 714 | } |
| 715 | |
| 716 | static void |
| 717 | bus_service_unlink (BusService *service) |
| 718 | { |
| 719 | _dbus_assert (service->owners == NULL); |
| 720 | |
| 721 | /* the service may not be in the hash, if |
| 722 | * the failure causing transaction cancel |
| 723 | * was in the right place, but that's OK |
| 724 | */ |
| 725 | _dbus_hash_table_remove_string (service->registry->service_hash, |
| 726 | service->name); |
| 727 | |
| 728 | bus_service_unref (service); |
| 729 | } |
| 730 | |
| 731 | static void |
| 732 | bus_service_relink (BusService *service, |
| 733 | DBusPreallocatedHash *preallocated) |
| 734 | { |
| 735 | _dbus_assert (service->owners == NULL); |
| 736 | _dbus_assert (preallocated != NULL); |
| 737 | |
| 738 | _dbus_hash_table_insert_string_preallocated (service->registry->service_hash, |
| 739 | preallocated, |
| 740 | service->name, |
| 741 | service); |
| 742 | |
| 743 | bus_service_ref (service); |
| 744 | } |
| 745 | |
| 746 | /** |
| 747 | * Data used to represent an ownership cancellation in |
| 748 | * a bus transaction. |
| 749 | */ |
| 750 | typedef struct |
| 751 | { |
| 752 | BusOwner *owner; /**< the owner */ |
| 753 | BusService *service; /**< service to cancel ownership of */ |
| 754 | } OwnershipCancelData; |
| 755 | |
| 756 | static void |
| 757 | cancel_ownership (void *data) |
| 758 | { |
| 759 | OwnershipCancelData *d = data; |
| 760 | |
| 761 | /* We don't need to send messages notifying of these |
| 762 | * changes, since we're reverting something that was |
| 763 | * cancelled (effectively never really happened) |
| 764 | */ |
| 765 | bus_service_unlink_owner (d->service, d->owner); |
| 766 | |
| 767 | if (d->service->owners == NULL) |
| 768 | bus_service_unlink (d->service); |
| 769 | } |
| 770 | |
| 771 | static void |
| 772 | free_ownership_cancel_data (void *data) |
| 773 | { |
| 774 | OwnershipCancelData *d = data; |
| 775 | |
| 776 | dbus_connection_unref (d->owner->conn); |
| 777 | bus_owner_unref (d->owner); |
| 778 | bus_service_unref (d->service); |
| 779 | |
| 780 | dbus_free (d); |
| 781 | } |
| 782 | |
| 783 | static dbus_bool_t |
| 784 | add_cancel_ownership_to_transaction (BusTransaction *transaction, |
| 785 | BusService *service, |
| 786 | BusOwner *owner) |
| 787 | { |
| 788 | OwnershipCancelData *d; |
| 789 | |
| 790 | d = dbus_new (OwnershipCancelData, 1); |
| 791 | if (d == NULL) |
| 792 | return FALSE; |
| 793 | |
| 794 | d->service = service; |
| 795 | d->owner = owner; |
| 796 | |
| 797 | if (!bus_transaction_add_cancel_hook (transaction, cancel_ownership, d, |
| 798 | free_ownership_cancel_data)) |
| 799 | { |
| 800 | dbus_free (d); |
| 801 | return FALSE; |
| 802 | } |
| 803 | |
| 804 | bus_service_ref (d->service); |
| 805 | bus_owner_ref (owner); |
| 806 | dbus_connection_ref (d->owner->conn); |
| 807 | |
| 808 | return TRUE; |
| 809 | } |
| 810 | |
| 811 | /* this function is self-cancelling if you cancel the transaction */ |
| 812 | dbus_bool_t |
| 813 | bus_service_add_owner (BusService *service, |
| 814 | DBusConnection *connection, |
| 815 | dbus_uint32_t flags, |
| 816 | BusTransaction *transaction, |
| 817 | DBusError *error) |
| 818 | { |
| 819 | BusOwner *bus_owner; |
| 820 | DBusList *bus_owner_link; |
| 821 | |
| 822 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 823 | |
| 824 | /* Send service acquired message first, OOM will result |
| 825 | * in cancelling the transaction |
| 826 | */ |
| 827 | if (service->owners == NULL) |
| 828 | { |
| 829 | if (!bus_driver_send_service_acquired (connection, service->name, transaction, error)) |
| 830 | return FALSE; |
| 831 | } |
| 832 | |
| 833 | bus_owner_link = _bus_service_find_owner_link (service, connection); |
| 834 | |
| 835 | if (bus_owner_link == NULL) |
| 836 | { |
| 837 | bus_owner = bus_owner_new (service, connection, flags); |
| 838 | if (bus_owner == NULL) |
| 839 | { |
| 840 | BUS_SET_OOM (error); |
| 841 | return FALSE; |
| 842 | } |
| 843 | |
| 844 | bus_owner_set_flags (bus_owner, flags); |
| 845 | if (!(flags & DBUS_NAME_FLAG_REPLACE_EXISTING) || service->owners == NULL) |
| 846 | { |
| 847 | if (!_dbus_list_append (&service->owners, |
| 848 | bus_owner)) |
| 849 | { |
| 850 | bus_owner_unref (bus_owner); |
| 851 | BUS_SET_OOM (error); |
| 852 | return FALSE; |
| 853 | } |
| 854 | } |
| 855 | else |
| 856 | { |
| 857 | if (!_dbus_list_insert_after (&service->owners, |
| 858 | _dbus_list_get_first_link (&service->owners), |
| 859 | bus_owner)) |
| 860 | { |
| 861 | bus_owner_unref (bus_owner); |
| 862 | BUS_SET_OOM (error); |
| 863 | return FALSE; |
| 864 | } |
| 865 | } |
| 866 | } |
| 867 | else |
| 868 | { |
| 869 | /* Update the link since we are already in the queue |
| 870 | * No need for operations that can produce OOM |
| 871 | */ |
| 872 | |
| 873 | bus_owner = (BusOwner *) bus_owner_link->data; |
| 874 | if (flags & DBUS_NAME_FLAG_REPLACE_EXISTING) |
| 875 | { |
| 876 | DBusList *link; |
| 877 | _dbus_list_unlink (&service->owners, bus_owner_link); |
| 878 | link = _dbus_list_get_first_link (&service->owners); |
| 879 | _dbus_assert (link != NULL); |
| 880 | |
| 881 | _dbus_list_insert_after_link (&service->owners, link, bus_owner_link); |
| 882 | } |
| 883 | |
| 884 | bus_owner_set_flags (bus_owner, flags); |
| 885 | return TRUE; |
| 886 | } |
| 887 | |
| 888 | if (!add_cancel_ownership_to_transaction (transaction, |
| 889 | service, |
| 890 | bus_owner)) |
| 891 | { |
| 892 | bus_service_unlink_owner (service, bus_owner); |
| 893 | BUS_SET_OOM (error); |
| 894 | return FALSE; |
| 895 | } |
| 896 | |
| 897 | return TRUE; |
| 898 | } |
| 899 | |
| 900 | typedef struct |
| 901 | { |
| 902 | BusOwner *owner; |
| 903 | BusService *service; |
| 904 | BusOwner *before_owner; /* restore to position before this connection in owners list */ |
| 905 | DBusList *owner_link; |
| 906 | DBusList *service_link; |
| 907 | DBusPreallocatedHash *hash_entry; |
| 908 | } OwnershipRestoreData; |
| 909 | |
| 910 | static void |
| 911 | restore_ownership (void *data) |
| 912 | { |
| 913 | OwnershipRestoreData *d = data; |
| 914 | DBusList *link; |
| 915 | |
| 916 | _dbus_assert (d->service_link != NULL); |
| 917 | _dbus_assert (d->owner_link != NULL); |
| 918 | |
| 919 | if (d->service->owners == NULL) |
| 920 | { |
| 921 | _dbus_assert (d->hash_entry != NULL); |
| 922 | bus_service_relink (d->service, d->hash_entry); |
| 923 | } |
| 924 | else |
| 925 | { |
| 926 | _dbus_assert (d->hash_entry == NULL); |
| 927 | } |
| 928 | |
| 929 | /* We don't need to send messages notifying of these |
| 930 | * changes, since we're reverting something that was |
| 931 | * cancelled (effectively never really happened) |
| 932 | */ |
| 933 | link = _dbus_list_get_first_link (&d->service->owners); |
| 934 | while (link != NULL) |
| 935 | { |
| 936 | if (link->data == d->before_owner) |
| 937 | break; |
| 938 | |
| 939 | link = _dbus_list_get_next_link (&d->service->owners, link); |
| 940 | } |
| 941 | |
| 942 | _dbus_list_insert_before_link (&d->service->owners, link, d->owner_link); |
| 943 | |
| 944 | /* Note that removing then restoring this changes the order in which |
| 945 | * ServiceDeleted messages are sent on destruction of the |
| 946 | * connection. This should be OK as the only guarantee there is |
| 947 | * that the base service is destroyed last, and we never even |
| 948 | * tentatively remove the base service. |
| 949 | */ |
| 950 | bus_connection_add_owned_service_link (d->owner->conn, d->service_link); |
| 951 | |
| 952 | d->hash_entry = NULL; |
| 953 | d->service_link = NULL; |
| 954 | d->owner_link = NULL; |
| 955 | } |
| 956 | |
| 957 | static void |
| 958 | free_ownership_restore_data (void *data) |
| 959 | { |
| 960 | OwnershipRestoreData *d = data; |
| 961 | |
| 962 | if (d->service_link) |
| 963 | _dbus_list_free_link (d->service_link); |
| 964 | if (d->owner_link) |
| 965 | _dbus_list_free_link (d->owner_link); |
| 966 | if (d->hash_entry) |
| 967 | _dbus_hash_table_free_preallocated_entry (d->service->registry->service_hash, |
| 968 | d->hash_entry); |
| 969 | |
| 970 | dbus_connection_unref (d->owner->conn); |
| 971 | bus_owner_unref (d->owner); |
| 972 | bus_service_unref (d->service); |
| 973 | |
| 974 | dbus_free (d); |
| 975 | } |
| 976 | |
| 977 | static dbus_bool_t |
| 978 | add_restore_ownership_to_transaction (BusTransaction *transaction, |
| 979 | BusService *service, |
| 980 | BusOwner *owner) |
| 981 | { |
| 982 | OwnershipRestoreData *d; |
| 983 | DBusList *link; |
| 984 | |
| 985 | d = dbus_new (OwnershipRestoreData, 1); |
| 986 | if (d == NULL) |
| 987 | return FALSE; |
| 988 | |
| 989 | d->service = service; |
| 990 | d->owner = owner; |
| 991 | d->service_link = _dbus_list_alloc_link (service); |
| 992 | d->owner_link = _dbus_list_alloc_link (owner); |
| 993 | d->hash_entry = _dbus_hash_table_preallocate_entry (service->registry->service_hash); |
| 994 | |
| 995 | bus_service_ref (d->service); |
| 996 | bus_owner_ref (d->owner); |
| 997 | dbus_connection_ref (d->owner->conn); |
| 998 | |
| 999 | d->before_owner = NULL; |
| 1000 | link = _dbus_list_get_first_link (&service->owners); |
| 1001 | while (link != NULL) |
| 1002 | { |
| 1003 | if (link->data == owner) |
| 1004 | { |
| 1005 | link = _dbus_list_get_next_link (&service->owners, link); |
| 1006 | |
| 1007 | if (link) |
| 1008 | d->before_owner = link->data; |
| 1009 | |
| 1010 | break; |
| 1011 | } |
| 1012 | |
| 1013 | link = _dbus_list_get_next_link (&service->owners, link); |
| 1014 | } |
| 1015 | |
| 1016 | if (d->service_link == NULL || |
| 1017 | d->owner_link == NULL || |
| 1018 | d->hash_entry == NULL || |
| 1019 | !bus_transaction_add_cancel_hook (transaction, restore_ownership, d, |
| 1020 | free_ownership_restore_data)) |
| 1021 | { |
| 1022 | free_ownership_restore_data (d); |
| 1023 | return FALSE; |
| 1024 | } |
| 1025 | |
| 1026 | return TRUE; |
| 1027 | } |
| 1028 | |
| 1029 | dbus_bool_t |
| 1030 | bus_service_swap_owner (BusService *service, |
| 1031 | DBusConnection *connection, |
| 1032 | BusTransaction *transaction, |
| 1033 | DBusError *error) |
| 1034 | { |
| 1035 | DBusList *swap_link; |
| 1036 | BusOwner *primary_owner; |
| 1037 | |
| 1038 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 1039 | |
| 1040 | /* We send out notifications before we do any work we |
| 1041 | * might have to undo if the notification-sending failed |
| 1042 | */ |
| 1043 | |
| 1044 | /* Send service lost message */ |
| 1045 | primary_owner = bus_service_get_primary_owner (service); |
| 1046 | if (primary_owner == NULL || primary_owner->conn != connection) |
| 1047 | _dbus_assert_not_reached ("Tried to swap a non primary owner"); |
| 1048 | |
| 1049 | |
| 1050 | if (!bus_driver_send_service_lost (connection, service->name, |
| 1051 | transaction, error)) |
| 1052 | return FALSE; |
| 1053 | |
| 1054 | if (service->owners == NULL) |
| 1055 | { |
| 1056 | _dbus_assert_not_reached ("Tried to swap owner of a service that has no owners"); |
| 1057 | } |
| 1058 | else if (_dbus_list_length_is_one (&service->owners)) |
| 1059 | { |
| 1060 | _dbus_assert_not_reached ("Tried to swap owner of a service that has no other owners in the queue"); |
| 1061 | } |
| 1062 | else |
| 1063 | { |
| 1064 | DBusList *link; |
| 1065 | BusOwner *new_owner; |
| 1066 | DBusConnection *new_owner_conn; |
| 1067 | link = _dbus_list_get_first_link (&service->owners); |
| 1068 | _dbus_assert (link != NULL); |
| 1069 | link = _dbus_list_get_next_link (&service->owners, link); |
| 1070 | _dbus_assert (link != NULL); |
| 1071 | |
| 1072 | new_owner = (BusOwner *)link->data; |
| 1073 | new_owner_conn = new_owner->conn; |
| 1074 | |
| 1075 | if (!bus_driver_send_service_owner_changed (service->name, |
| 1076 | bus_connection_get_name (connection), |
| 1077 | bus_connection_get_name (new_owner_conn), |
| 1078 | transaction, error)) |
| 1079 | return FALSE; |
| 1080 | |
| 1081 | /* This will be our new owner */ |
| 1082 | if (!bus_driver_send_service_acquired (new_owner_conn, |
| 1083 | service->name, |
| 1084 | transaction, |
| 1085 | error)) |
| 1086 | return FALSE; |
| 1087 | } |
| 1088 | |
| 1089 | if (!add_restore_ownership_to_transaction (transaction, service, primary_owner)) |
| 1090 | { |
| 1091 | BUS_SET_OOM (error); |
| 1092 | return FALSE; |
| 1093 | } |
| 1094 | |
| 1095 | /* unlink the primary and make it the second link */ |
| 1096 | swap_link = _dbus_list_get_first_link (&service->owners); |
| 1097 | _dbus_list_unlink (&service->owners, swap_link); |
| 1098 | |
| 1099 | _dbus_list_insert_after_link (&service->owners, |
| 1100 | _dbus_list_get_first_link (&service->owners), |
| 1101 | swap_link); |
| 1102 | |
| 1103 | return TRUE; |
| 1104 | } |
| 1105 | |
| 1106 | /* this function is self-cancelling if you cancel the transaction */ |
| 1107 | dbus_bool_t |
| 1108 | bus_service_remove_owner (BusService *service, |
| 1109 | DBusConnection *connection, |
| 1110 | BusTransaction *transaction, |
| 1111 | DBusError *error) |
| 1112 | { |
| 1113 | BusOwner *primary_owner; |
| 1114 | |
| 1115 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 1116 | |
| 1117 | /* We send out notifications before we do any work we |
| 1118 | * might have to undo if the notification-sending failed |
| 1119 | */ |
| 1120 | |
| 1121 | /* Send service lost message */ |
| 1122 | primary_owner = bus_service_get_primary_owner (service); |
| 1123 | if (primary_owner != NULL && primary_owner->conn == connection) |
| 1124 | { |
| 1125 | if (!bus_driver_send_service_lost (connection, service->name, |
| 1126 | transaction, error)) |
| 1127 | return FALSE; |
| 1128 | } |
| 1129 | else |
| 1130 | { |
| 1131 | /* if we are not the primary owner then just remove us from the queue */ |
| 1132 | DBusList *link; |
| 1133 | BusOwner *temp_owner; |
| 1134 | |
| 1135 | link = _bus_service_find_owner_link (service, connection); |
| 1136 | _dbus_list_unlink (&service->owners, link); |
| 1137 | temp_owner = (BusOwner *)link->data; |
| 1138 | bus_owner_unref (temp_owner); |
| 1139 | _dbus_list_free_link (link); |
| 1140 | |
| 1141 | return TRUE; |
| 1142 | } |
| 1143 | |
| 1144 | if (service->owners == NULL) |
| 1145 | { |
| 1146 | _dbus_assert_not_reached ("Tried to remove owner of a service that has no owners"); |
| 1147 | } |
| 1148 | else if (_dbus_list_length_is_one (&service->owners)) |
| 1149 | { |
| 1150 | if (!bus_driver_send_service_owner_changed (service->name, |
| 1151 | bus_connection_get_name (connection), |
| 1152 | NULL, |
| 1153 | transaction, error)) |
| 1154 | return FALSE; |
| 1155 | } |
| 1156 | else |
| 1157 | { |
| 1158 | DBusList *link; |
| 1159 | BusOwner *new_owner; |
| 1160 | DBusConnection *new_owner_conn; |
| 1161 | link = _dbus_list_get_first_link (&service->owners); |
| 1162 | _dbus_assert (link != NULL); |
| 1163 | link = _dbus_list_get_next_link (&service->owners, link); |
| 1164 | _dbus_assert (link != NULL); |
| 1165 | |
| 1166 | new_owner = (BusOwner *)link->data; |
| 1167 | new_owner_conn = new_owner->conn; |
| 1168 | |
| 1169 | if (!bus_driver_send_service_owner_changed (service->name, |
| 1170 | bus_connection_get_name (connection), |
| 1171 | bus_connection_get_name (new_owner_conn), |
| 1172 | transaction, error)) |
| 1173 | return FALSE; |
| 1174 | |
| 1175 | /* This will be our new owner */ |
| 1176 | if (!bus_driver_send_service_acquired (new_owner_conn, |
| 1177 | service->name, |
| 1178 | transaction, |
| 1179 | error)) |
| 1180 | return FALSE; |
| 1181 | } |
| 1182 | |
| 1183 | if (!add_restore_ownership_to_transaction (transaction, service, primary_owner)) |
| 1184 | { |
| 1185 | BUS_SET_OOM (error); |
| 1186 | return FALSE; |
| 1187 | } |
| 1188 | |
| 1189 | bus_service_unlink_owner (service, primary_owner); |
| 1190 | |
| 1191 | if (service->owners == NULL) |
| 1192 | bus_service_unlink (service); |
| 1193 | |
| 1194 | return TRUE; |
| 1195 | } |
| 1196 | |
| 1197 | BusService * |
| 1198 | bus_service_ref (BusService *service) |
| 1199 | { |
| 1200 | _dbus_assert (service->refcount > 0); |
| 1201 | |
| 1202 | service->refcount += 1; |
| 1203 | |
| 1204 | return service; |
| 1205 | } |
| 1206 | |
| 1207 | void |
| 1208 | bus_service_unref (BusService *service) |
| 1209 | { |
| 1210 | _dbus_assert (service->refcount > 0); |
| 1211 | |
| 1212 | service->refcount -= 1; |
| 1213 | |
| 1214 | if (service->refcount == 0) |
| 1215 | { |
| 1216 | _dbus_assert (service->owners == NULL); |
| 1217 | |
| 1218 | dbus_free (service->name); |
| 1219 | _dbus_mem_pool_dealloc (service->registry->service_pool, service); |
| 1220 | } |
| 1221 | } |
| 1222 | |
| 1223 | DBusConnection * |
| 1224 | bus_service_get_primary_owners_connection (BusService *service) |
| 1225 | { |
| 1226 | BusOwner *owner; |
| 1227 | |
| 1228 | owner = bus_service_get_primary_owner (service); |
| 1229 | |
| 1230 | if (owner != NULL) |
| 1231 | return owner->conn; |
| 1232 | else |
| 1233 | return NULL; |
| 1234 | } |
| 1235 | |
| 1236 | BusOwner* |
| 1237 | bus_service_get_primary_owner (BusService *service) |
| 1238 | { |
| 1239 | return _dbus_list_get_first (&service->owners); |
| 1240 | } |
| 1241 | |
| 1242 | const char* |
| 1243 | bus_service_get_name (BusService *service) |
| 1244 | { |
| 1245 | return service->name; |
| 1246 | } |
| 1247 | |
| 1248 | dbus_bool_t |
| 1249 | bus_service_get_allow_replacement (BusService *service) |
| 1250 | { |
| 1251 | BusOwner *owner; |
| 1252 | DBusList *link; |
| 1253 | |
| 1254 | _dbus_assert (service->owners != NULL); |
| 1255 | |
| 1256 | link = _dbus_list_get_first_link (&service->owners); |
| 1257 | owner = (BusOwner *) link->data; |
| 1258 | |
| 1259 | return owner->allow_replacement; |
| 1260 | } |
| 1261 | |
| 1262 | dbus_bool_t |
| 1263 | bus_service_has_owner (BusService *service, |
| 1264 | DBusConnection *connection) |
| 1265 | { |
| 1266 | DBusList *link; |
| 1267 | |
| 1268 | link = _bus_service_find_owner_link (service, connection); |
| 1269 | |
| 1270 | if (link == NULL) |
| 1271 | return FALSE; |
| 1272 | else |
| 1273 | return TRUE; |
| 1274 | } |
| 1275 | |
| 1276 | dbus_bool_t |
| 1277 | bus_service_list_queued_owners (BusService *service, |
| 1278 | DBusList **return_list, |
| 1279 | DBusError *error) |
| 1280 | { |
| 1281 | DBusList *link; |
| 1282 | |
| 1283 | _dbus_assert (*return_list == NULL); |
| 1284 | |
| 1285 | link = _dbus_list_get_first_link (&service->owners); |
| 1286 | _dbus_assert (link != NULL); |
| 1287 | |
| 1288 | while (link != NULL) |
| 1289 | { |
| 1290 | BusOwner *owner; |
| 1291 | const char *uname; |
| 1292 | |
| 1293 | owner = (BusOwner *) link->data; |
| 1294 | uname = bus_connection_get_name (owner->conn); |
| 1295 | |
| 1296 | if (!_dbus_list_append (return_list, (char *)uname)) |
| 1297 | goto oom; |
| 1298 | |
| 1299 | link = _dbus_list_get_next_link (&service->owners, link); |
| 1300 | } |
| 1301 | |
| 1302 | return TRUE; |
| 1303 | |
| 1304 | oom: |
| 1305 | _dbus_list_clear (return_list); |
| 1306 | BUS_SET_OOM (error); |
| 1307 | return FALSE; |
| 1308 | } |