src/logind-dbus.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2011 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   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   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <pwd.h>
  26
  27 #include "logind.h"
  28 #include "dbus-common.h"
  29 #include "strv.h"
  30 #include "polkit.h"
  31
  32 #define BUS_MANAGER_INTERFACE                                           \
  33         " <interface name=\"org.freedesktop.login1.Manager\">\n"        \
  34         "  <method name=\"GetSession\">\n"                              \
  35         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  36         "   <arg name=\"session\" type=\"o\" direction=\"out\"/>\n"     \
  37         "  </method>\n"                                                 \
  38         "  <method name=\"GetUser\">\n"                                 \
  39         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  40         "   <arg name=\"user\" type=\"o\" direction=\"out\"/>\n"        \
  41         "  </method>\n"                                                 \
  42         "  <method name=\"GetSeat\">\n"                                 \
  43         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  44         "   <arg name=\"seat\" type=\"o\" direction=\"out\"/>\n"        \
  45         "  </method>\n"                                                 \
  46         "  <method name=\"ListSessions\">\n"                            \
  47         "   <arg name=\"sessions\" type=\"a(susso)\" direction=\"out\"/>\n" \
  48         "  </method>\n"                                                 \
  49         "  <method name=\"ListUsers\">\n"                               \
  50         "   <arg name=\"users\" type=\"a(uso)\" direction=\"out\"/>\n"  \
  51         "  </method>\n"                                                 \
  52         "  <method name=\"ListSeats\">\n"                               \
  53         "   <arg name=\"seats\" type=\"a(so)\" direction=\"out\"/>\n"   \
  54         "  </method>\n"                                                 \
  55         "  <method name=\"CreateSession\">\n"                           \
  56         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  57         "   <arg name=\"leader\" type=\"u\" direction=\"in\"/>\n"       \
  58         "   <arg name=\"sevice\" type=\"s\" direction=\"in\"/>\n"       \
  59         "   <arg name=\"type\" type=\"s\" direction=\"in\"/>\n"         \
  60         "   <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n"         \
  61         "   <arg name=\"vtnr\" type=\"u\" direction=\"in\"/>\n"         \
  62         "   <arg name=\"tty\" type=\"s\" direction=\"in\"/>\n"          \
  63         "   <arg name=\"display\" type=\"s\" direction=\"in\"/>\n"      \
  64         "   <arg name=\"remote\" type=\"b\" direction=\"in\"/>\n"       \
  65         "   <arg name=\"remote_user\" type=\"s\" direction=\"in\"/>\n"  \
  66         "   <arg name=\"remote_host\" type=\"s\" direction=\"in\"/>\n"  \
  67         "   <arg name=\"controllers\" type=\"as\" direction=\"in\"/>\n" \
  68         "   <arg name=\"reset_controllers\" type=\"as\" direction=\"in\"/>\n" \
  69         "   <arg name=\"kill_processes\" type=\"b\" direction=\"in\"/>\n" \
  70         "   <arg name=\"id\" type=\"s\" direction=\"out\"/>\n"          \
  71         "   <arg name=\"path\" type=\"o\" direction=\"out\"/>\n"        \
  72         "   <arg name=\"runtime_path\" type=\"o\" direction=\"out\"/>\n" \
  73         "   <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n"          \
  74         "  </method>\n"                                                 \
  75         "  <method name=\"ActivateSession\">\n"                         \
  76         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  77         "  </method>\n"                                                 \
  78         "  <method name=\"TerminateSession\">\n"                        \
  79         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  80         "  </method>\n"                                                 \
  81         "  <method name=\"TerminateUser\">\n"                           \
  82         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  83         "  </method>\n"                                                 \
  84         "  <method name=\"TerminateSeat\">\n"                           \
  85         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  86         "  </method>\n"                                                 \
  87         "  <method name=\"SetUserLinger\">\n"                           \
  88         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  89         "   <arg name=\"b\" type=\"b\" direction=\"in\"/>\n"            \
  90         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
  91         "  </method>\n"                                                 \
  92         "  <method name=\"AttachDevice\">\n"                            \
  93         "   <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n"         \
  94         "   <arg name=\"sysfs\" type=\"s\" direction=\"in\"/>\n"        \
  95         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
  96         "  </method>\n"                                                 \
  97         "  <method name=\"FlushDevices\">\n"                            \
  98         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
  99         "  </method>\n"                                                 \
 100         "  <signal name=\"SessionNew\">\n"                              \
 101         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 102         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 103         "  </signal>\n"                                                 \
 104         "  <signal name=\"SessionRemoved\">\n"                          \
 105         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 106         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 107         "  </signal>\n"                                                 \
 108         "  <signal name=\"UserNew\">\n"                                 \
 109         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
 110         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 111         "  </signal>\n"                                                 \
 112         "  <signal name=\"UserRemoved\">\n"                             \
 113         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
 114         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 115         "  </signal>\n"                                                 \
 116         "  <signal name=\"SeatNew\">\n"                                 \
 117         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 118         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 119         "  </signal>\n"                                                 \
 120         "  <signal name=\"SeatRemoved\">\n"                             \
 121         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 122         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 123         "  </signal>\n"                                                 \
 124         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 125         "  <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \
 126         "  <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \
 127         "  <property name=\"NAutoVTs\" type=\"u\" access=\"read\"/>\n" \
 128         "  <property name=\"KillOnlyUsers\" type=\"as\" access=\"read\"/>\n" \
 129         "  <property name=\"KillExcludeUsers\" type=\"as\" access=\"read\"/>\n" \
 130         "  <property name=\"KillUserProcesses\" type=\"b\" access=\"read\"/>\n" \
 131         "  <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n"  \
 132         "  <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
 133         "  <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
 134         " </interface>\n"
 135
 136 #define INTROSPECTION_BEGIN                                             \
 137         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 138         "<node>\n"                                                      \
 139         BUS_MANAGER_INTERFACE                                           \
 140         BUS_PROPERTIES_INTERFACE                                        \
 141         BUS_PEER_INTERFACE                                              \
 142         BUS_INTROSPECTABLE_INTERFACE
 143
 144 #define INTROSPECTION_END                                               \
 145         "</node>\n"
 146
 147 #define INTERFACES_LIST                              \
 148         BUS_GENERIC_INTERFACES_LIST                  \
 149         "org.freedesktop.login1.Manager\0"
 150
 151 static int bus_manager_append_idle_hint(DBusMessageIter *i, const char *property, void *data) {
 152         Manager *m = data;
 153         dbus_bool_t b;
 154
 155         assert(i);
 156         assert(property);
 157         assert(m);
 158
 159         b = manager_get_idle_hint(m, NULL) > 0;
 160         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
 161                 return -ENOMEM;
 162
 163         return 0;
 164 }
 165
 166 static int bus_manager_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) {
 167         Manager *m = data;
 168         dual_timestamp t;
 169         uint64_t u;
 170
 171         assert(i);
 172         assert(property);
 173         assert(m);
 174
 175         manager_get_idle_hint(m, &t);
 176         u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
 177
 178         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
 179                 return -ENOMEM;
 180
 181         return 0;
 182 }
 183
 184 static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMessage **_reply) {
 185         Session *session = NULL;
 186         User *user = NULL;
 187         const char *type, *seat, *tty, *display, *remote_user, *remote_host, *service;
 188         uint32_t uid, leader, audit_id = 0;
 189         dbus_bool_t remote, kill_processes;
 190         char **controllers = NULL, **reset_controllers = NULL;
 191         SessionType t;
 192         Seat *s;
 193         DBusMessageIter iter;
 194         int r;
 195         char *id = NULL, *p;
 196         uint32_t vtnr = 0;
 197         int fifo_fd = -1;
 198         DBusMessage *reply = NULL;
 199         bool b;
 200
 201         assert(m);
 202         assert(message);
 203         assert(_reply);
 204
 205         if (!dbus_message_iter_init(message, &iter) ||
 206             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 207                 return -EINVAL;
 208
 209         dbus_message_iter_get_basic(&iter, &uid);
 210
 211         if (!dbus_message_iter_next(&iter) ||
 212             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 213                 return -EINVAL;
 214
 215         dbus_message_iter_get_basic(&iter, &leader);
 216
 217         if (leader <= 0 ||
 218             !dbus_message_iter_next(&iter) ||
 219             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 220                 return -EINVAL;
 221
 222         dbus_message_iter_get_basic(&iter, &service);
 223
 224         if (!dbus_message_iter_next(&iter) ||
 225             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 226                 return -EINVAL;
 227
 228         dbus_message_iter_get_basic(&iter, &type);
 229         t = session_type_from_string(type);
 230
 231         if (t < 0 ||
 232             !dbus_message_iter_next(&iter) ||
 233             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 234                 return -EINVAL;
 235
 236         dbus_message_iter_get_basic(&iter, &seat);
 237
 238         if (isempty(seat))
 239                 s = NULL;
 240         else {
 241                 s = hashmap_get(m->seats, seat);
 242                 if (!s)
 243                         return -ENOENT;
 244         }
 245
 246         if (!dbus_message_iter_next(&iter) ||
 247             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 248                 return -EINVAL;
 249
 250         dbus_message_iter_get_basic(&iter, &vtnr);
 251
 252         if (!dbus_message_iter_next(&iter) ||
 253             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 254                 return -EINVAL;
 255
 256         dbus_message_iter_get_basic(&iter, &tty);
 257
 258         if (tty_is_vc(tty)) {
 259                 int v;
 260
 261                 if (!s)
 262                         s = m->vtconsole;
 263                 else if (s != m->vtconsole)
 264                         return -EINVAL;
 265
 266                 v = vtnr_from_tty(tty);
 267
 268                 if (v <= 0)
 269                         return v < 0 ? v : -EINVAL;
 270
 271                 if (vtnr <= 0)
 272                         vtnr = (uint32_t) v;
 273                 else if (vtnr != (uint32_t) v)
 274                         return -EINVAL;
 275
 276         } else if (!isempty(tty) && s && seat_is_vtconsole(s))
 277                 return -EINVAL;
 278
 279         if (s) {
 280                 if (seat_is_vtconsole(s)) {
 281                         if (vtnr <= 0 || vtnr > 63)
 282                                 return -EINVAL;
 283                 } else {
 284                         if (vtnr > 0)
 285                                 return -EINVAL;
 286                 }
 287         }
 288
 289         if (!dbus_message_iter_next(&iter) ||
 290             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 291                 return -EINVAL;
 292
 293         dbus_message_iter_get_basic(&iter, &display);
 294
 295         if (!dbus_message_iter_next(&iter) ||
 296             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
 297                 return -EINVAL;
 298
 299         dbus_message_iter_get_basic(&iter, &remote);
 300
 301         if (!dbus_message_iter_next(&iter) ||
 302             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 303                 return -EINVAL;
 304
 305         dbus_message_iter_get_basic(&iter, &remote_user);
 306
 307         if (!dbus_message_iter_next(&iter) ||
 308             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 309                 return -EINVAL;
 310
 311         dbus_message_iter_get_basic(&iter, &remote_host);
 312
 313         if (!dbus_message_iter_next(&iter) ||
 314             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 315             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
 316                 return -EINVAL;
 317
 318         r = bus_parse_strv_iter(&iter, &controllers);
 319         if (r < 0)
 320                 return -EINVAL;
 321
 322         if (strv_contains(controllers, "systemd") ||
 323             !dbus_message_iter_next(&iter) ||
 324             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 325             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING) {
 326                 r = -EINVAL;
 327                 goto fail;
 328         }
 329
 330         r = bus_parse_strv_iter(&iter, &reset_controllers);
 331         if (r < 0)
 332                 goto fail;
 333
 334         if (strv_contains(reset_controllers, "systemd") ||
 335             !dbus_message_iter_next(&iter) ||
 336             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) {
 337                 r = -EINVAL;
 338                 goto fail;
 339         }
 340
 341         dbus_message_iter_get_basic(&iter, &kill_processes);
 342
 343         r = manager_add_user_by_uid(m, uid, &user);
 344         if (r < 0)
 345                 goto fail;
 346
 347         audit_session_from_pid(leader, &audit_id);
 348
 349         if (audit_id > 0) {
 350                 asprintf(&id, "%lu", (unsigned long) audit_id);
 351
 352                 if (!id) {
 353                         r = -ENOMEM;
 354                         goto fail;
 355                 }
 356
 357                 session = hashmap_get(m->sessions, id);
 358
 359                 if (session) {
 360
 361                         fifo_fd = session_create_fifo(session);
 362                         if (fifo_fd < 0) {
 363                                 r = fifo_fd;
 364                                 goto fail;
 365                         }
 366
 367                         /* Session already exists, client is probably
 368                          * something like "su" which changes uid but
 369                          * is still the same audit session */
 370
 371                         reply = dbus_message_new_method_return(message);
 372                         if (!reply) {
 373                                 r = -ENOMEM;
 374                                 goto fail;
 375                         }
 376
 377                         p = session_bus_path(session);
 378                         if (!p) {
 379                                 r = -ENOMEM;
 380                                 goto fail;
 381                         }
 382
 383                         b = dbus_message_append_args(
 384                                         reply,
 385                                         DBUS_TYPE_STRING, &session->id,
 386                                         DBUS_TYPE_OBJECT_PATH, &p,
 387                                         DBUS_TYPE_STRING, &session->user->runtime_path,
 388                                         DBUS_TYPE_UNIX_FD, &fifo_fd,
 389                                         DBUS_TYPE_INVALID);
 390                         free(p);
 391
 392                         if (!b) {
 393                                 r = -ENOMEM;
 394                                 goto fail;
 395                         }
 396
 397                         close_nointr_nofail(fifo_fd);
 398                         *_reply = reply;
 399
 400                         return 0;
 401                 }
 402
 403         } else {
 404                 do {
 405                         free(id);
 406                         asprintf(&id, "c%lu", ++m->session_counter);
 407
 408                         if (!id) {
 409                                 r = -ENOMEM;
 410                                 goto fail;
 411                         }
 412
 413                 } while (hashmap_get(m->sessions, id));
 414         }
 415
 416         r = manager_add_session(m, user, id, &session);
 417         free(id);
 418         if (r < 0)
 419                 goto fail;
 420
 421         session->leader = leader;
 422         session->audit_id = audit_id;
 423         session->type = t;
 424         session->remote = remote;
 425         session->controllers = controllers;
 426         session->reset_controllers = reset_controllers;
 427         session->kill_processes = kill_processes;
 428         session->vtnr = vtnr;
 429
 430         controllers = reset_controllers = NULL;
 431
 432         if (!isempty(tty)) {
 433                 session->tty = strdup(tty);
 434                 if (!session->tty) {
 435                         r = -ENOMEM;
 436                         goto fail;
 437                 }
 438         }
 439
 440         if (!isempty(display)) {
 441                 session->display = strdup(display);
 442                 if (!session->display) {
 443                         r = -ENOMEM;
 444                         goto fail;
 445                 }
 446         }
 447
 448         if (!isempty(remote_user)) {
 449                 session->remote_user = strdup(remote_user);
 450                 if (!session->remote_user) {
 451                         r = -ENOMEM;
 452                         goto fail;
 453                 }
 454         }
 455
 456         if (!isempty(remote_host)) {
 457                 session->remote_host = strdup(remote_host);
 458                 if (!session->remote_host) {
 459                         r = -ENOMEM;
 460                         goto fail;
 461                 }
 462         }
 463
 464         if (!isempty(service)) {
 465                 session->service = strdup(service);
 466                 if (!session->service) {
 467                         r = -ENOMEM;
 468                         goto fail;
 469                 }
 470         }
 471
 472         fifo_fd = session_create_fifo(session);
 473         if (fifo_fd < 0) {
 474                 r = fifo_fd;
 475                 goto fail;
 476         }
 477
 478         if (s) {
 479                 r = seat_attach_session(s, session);
 480                 if (r < 0)
 481                         goto fail;
 482         }
 483
 484         r = session_start(session);
 485         if (r < 0)
 486                 goto fail;
 487
 488         reply = dbus_message_new_method_return(message);
 489         if (!reply) {
 490                 r = -ENOMEM;
 491                 goto fail;
 492         }
 493
 494         p = session_bus_path(session);
 495         if (!p) {
 496                 r = -ENOMEM;
 497                 goto fail;
 498         }
 499
 500         b = dbus_message_append_args(
 501                         reply,
 502                         DBUS_TYPE_STRING, &session->id,
 503                         DBUS_TYPE_OBJECT_PATH, &p,
 504                         DBUS_TYPE_STRING, &session->user->runtime_path,
 505                         DBUS_TYPE_UNIX_FD, &fifo_fd,
 506                         DBUS_TYPE_INVALID);
 507         free(p);
 508
 509         if (!b) {
 510                 r = -ENOMEM;
 511                 goto fail;
 512         }
 513
 514         close_nointr_nofail(fifo_fd);
 515         *_reply = reply;
 516
 517         return 0;
 518
 519 fail:
 520         strv_free(controllers);
 521         strv_free(reset_controllers);
 522
 523         if (session)
 524                 session_add_to_gc_queue(session);
 525
 526         if (user)
 527                 user_add_to_gc_queue(user);
 528
 529         if (fifo_fd >= 0)
 530                 close_nointr_nofail(fifo_fd);
 531
 532         if (reply)
 533                 dbus_message_unref(reply);
 534
 535         return r;
 536 }
 537
 538 static bool device_has_tag(struct udev_device *d, const char *tag) {
 539         struct udev_list_entry *first, *item;
 540
 541         assert(d);
 542         assert(tag);
 543
 544         udev_device_get_is_initialized(d);
 545
 546         first = udev_device_get_tags_list_entry(d);
 547         udev_list_entry_foreach(item, first)
 548                 if (streq(udev_list_entry_get_name(item), tag))
 549                         return true;
 550
 551         return false;
 552 }
 553
 554 static int trigger_device(Manager *m, const char *prefix) {
 555         struct udev_enumerate *e;
 556         struct udev_list_entry *first, *item;
 557         int r;
 558
 559         assert(m);
 560
 561         e = udev_enumerate_new(m->udev);
 562         if (!e) {
 563                 r = -ENOMEM;
 564                 goto finish;
 565         }
 566
 567         if (udev_enumerate_scan_devices(e) < 0) {
 568                 r = -EIO;
 569                 goto finish;
 570         }
 571
 572         first = udev_enumerate_get_list_entry(e);
 573         udev_list_entry_foreach(item, first) {
 574                 char *t;
 575                 const char *p;
 576
 577                 p = udev_list_entry_get_name(item);
 578
 579                 if (prefix && !path_startswith(p, prefix))
 580                         continue;
 581
 582                 t = strappend(p, "/uevent");
 583                 if (!t) {
 584                         r = -ENOMEM;
 585                         goto finish;
 586                 }
 587
 588                 write_one_line_file(t, "change");
 589                 free(t);
 590         }
 591
 592         r = 0;
 593
 594 finish:
 595         if (e)
 596                 udev_enumerate_unref(e);
 597
 598         return r;
 599 }
 600
 601 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
 602         struct udev_device *d;
 603         char *rule = NULL, *file = NULL;
 604         const char *id_for_seat;
 605         int r;
 606
 607         assert(m);
 608         assert(seat);
 609         assert(sysfs);
 610
 611         d = udev_device_new_from_syspath(m->udev, sysfs);
 612         if (!d)
 613                 return -ENODEV;
 614
 615         if (!device_has_tag(d, "seat")) {
 616                 r = -ENODEV;
 617                 goto finish;
 618         }
 619
 620         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
 621         if (!id_for_seat) {
 622                 r = -ENODEV;
 623                 goto finish;
 624         }
 625
 626         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0) {
 627                 r = -ENOMEM;
 628                 goto finish;
 629         }
 630
 631         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0) {
 632                 r = -ENOMEM;
 633                 goto finish;
 634         }
 635
 636         mkdir_p("/etc/udev/rules.d", 0755);
 637         r = write_one_line_file_atomic(file, rule);
 638         if (r < 0)
 639                 goto finish;
 640
 641         r = trigger_device(m, sysfs);
 642
 643 finish:
 644         free(rule);
 645         free(file);
 646
 647         if (d)
 648                 udev_device_unref(d);
 649
 650         return r;
 651 }
 652
 653 static int flush_devices(Manager *m) {
 654         DIR *d;
 655
 656         assert(m);
 657
 658         d = opendir("/etc/udev/rules.d");
 659         if (!d) {
 660                 if (errno != ENOENT)
 661                         log_warning("Failed to open /etc/udev/rules.d: %m");
 662         } else {
 663                 struct dirent *de;
 664
 665                 while ((de = readdir(d))) {
 666
 667                         if (!dirent_is_file(de))
 668                                 continue;
 669
 670                         if (!startswith(de->d_name, "72-seat-"))
 671                                 continue;
 672
 673                         if (!endswith(de->d_name, ".rules"))
 674                                 continue;
 675
 676                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
 677                                 log_warning("Failed to unlink %s: %m", de->d_name);
 678                 }
 679
 680                 closedir(d);
 681         }
 682
 683         return trigger_device(m, NULL);
 684 }
 685
 686 static DBusHandlerResult manager_message_handler(
 687                 DBusConnection *connection,
 688                 DBusMessage *message,
 689                 void *userdata) {
 690
 691         Manager *m = userdata;
 692
 693         const BusProperty properties[] = {
 694                 { "org.freedesktop.login1.Manager", "ControlGroupHierarchy",  bus_property_append_string,   "s",  m->cgroup_path          },
 695                 { "org.freedesktop.login1.Manager", "Controllers",            bus_property_append_strv,     "as", m->controllers          },
 696                 { "org.freedesktop.login1.Manager", "ResetControllers",       bus_property_append_strv,     "as", m->reset_controllers    },
 697                 { "org.freedesktop.login1.Manager", "NAutoVTs",               bus_property_append_unsigned, "u",  &m->n_autovts           },
 698                 { "org.freedesktop.login1.Manager", "KillOnlyUsers",          bus_property_append_strv,     "as", m->kill_only_users      },
 699                 { "org.freedesktop.login1.Manager", "KillExcludeUsers",       bus_property_append_strv,     "as", m->kill_exclude_users   },
 700                 { "org.freedesktop.login1.Manager", "KillUserProcesses",      bus_property_append_bool,     "b",  &m->kill_user_processes },
 701                 { "org.freedesktop.login1.Manager", "IdleHint",               bus_manager_append_idle_hint, "b",  m                       },
 702                 { "org.freedesktop.login1.Manager", "IdleSinceHint",          bus_manager_append_idle_hint_since, "t", m                  },
 703                 { "org.freedesktop.login1.Manager", "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", m                  },
 704                 { NULL, NULL, NULL, NULL, NULL }
 705         };
 706
 707         DBusError error;
 708         DBusMessage *reply = NULL;
 709         int r;
 710
 711         assert(connection);
 712         assert(message);
 713         assert(m);
 714
 715         dbus_error_init(&error);
 716
 717         if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSession")) {
 718                 const char *name;
 719                 char *p;
 720                 Session *session;
 721                 bool b;
 722
 723                 if (!dbus_message_get_args(
 724                                     message,
 725                                     &error,
 726                                     DBUS_TYPE_STRING, &name,
 727                                     DBUS_TYPE_INVALID))
 728                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 729
 730                 session = hashmap_get(m->sessions, name);
 731                 if (!session)
 732                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 733
 734                 reply = dbus_message_new_method_return(message);
 735                 if (!reply)
 736                         goto oom;
 737
 738                 p = session_bus_path(session);
 739                 if (!p)
 740                         goto oom;
 741
 742                 b = dbus_message_append_args(
 743                                 reply,
 744                                 DBUS_TYPE_OBJECT_PATH, &p,
 745                                 DBUS_TYPE_INVALID);
 746                 free(p);
 747
 748                 if (!b)
 749                         goto oom;
 750
 751         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetUser")) {
 752                 uint32_t uid;
 753                 char *p;
 754                 User *user;
 755                 bool b;
 756
 757                 if (!dbus_message_get_args(
 758                                     message,
 759                                     &error,
 760                                     DBUS_TYPE_UINT32, &uid,
 761                                     DBUS_TYPE_INVALID))
 762                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 763
 764                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 765                 if (!user)
 766                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 767
 768                 reply = dbus_message_new_method_return(message);
 769                 if (!reply)
 770                         goto oom;
 771
 772                 p = user_bus_path(user);
 773                 if (!p)
 774                         goto oom;
 775
 776                 b = dbus_message_append_args(
 777                                 reply,
 778                                 DBUS_TYPE_OBJECT_PATH, &p,
 779                                 DBUS_TYPE_INVALID);
 780                 free(p);
 781
 782                 if (!b)
 783                         goto oom;
 784
 785         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSeat")) {
 786                 const char *name;
 787                 char *p;
 788                 Seat *seat;
 789                 bool b;
 790
 791                 if (!dbus_message_get_args(
 792                                     message,
 793                                     &error,
 794                                     DBUS_TYPE_STRING, &name,
 795                                     DBUS_TYPE_INVALID))
 796                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 797
 798                 seat = hashmap_get(m->seats, name);
 799                 if (!seat)
 800                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 801
 802                 reply = dbus_message_new_method_return(message);
 803                 if (!reply)
 804                         goto oom;
 805
 806                 p = seat_bus_path(seat);
 807                 if (!p)
 808                         goto oom;
 809
 810                 b = dbus_message_append_args(
 811                                 reply,
 812                                 DBUS_TYPE_OBJECT_PATH, &p,
 813                                 DBUS_TYPE_INVALID);
 814                 free(p);
 815
 816                 if (!b)
 817                         goto oom;
 818
 819         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSessions")) {
 820                 char *p;
 821                 Session *session;
 822                 Iterator i;
 823                 DBusMessageIter iter, sub;
 824                 const char *empty = "";
 825
 826                 reply = dbus_message_new_method_return(message);
 827                 if (!reply)
 828                         goto oom;
 829
 830                 dbus_message_iter_init_append(reply, &iter);
 831
 832                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(susso)", &sub))
 833                         goto oom;
 834
 835                 HASHMAP_FOREACH(session, m->sessions, i) {
 836                         DBusMessageIter sub2;
 837                         uint32_t uid;
 838
 839                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 840                                 goto oom;
 841
 842                         uid = session->user->uid;
 843
 844                         p = session_bus_path(session);
 845                         if (!p)
 846                                 goto oom;
 847
 848                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) ||
 849                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 850                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->user->name) ||
 851                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, session->seat ? (const char**) &session->seat->id : &empty) ||
 852                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 853                                 free(p);
 854                                 goto oom;
 855                         }
 856
 857                         free(p);
 858
 859                         if (!dbus_message_iter_close_container(&sub, &sub2))
 860                                 goto oom;
 861                 }
 862
 863                 if (!dbus_message_iter_close_container(&iter, &sub))
 864                         goto oom;
 865
 866         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListUsers")) {
 867                 char *p;
 868                 User *user;
 869                 Iterator i;
 870                 DBusMessageIter iter, sub;
 871
 872                 reply = dbus_message_new_method_return(message);
 873                 if (!reply)
 874                         goto oom;
 875
 876                 dbus_message_iter_init_append(reply, &iter);
 877
 878                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(uso)", &sub))
 879                         goto oom;
 880
 881                 HASHMAP_FOREACH(user, m->users, i) {
 882                         DBusMessageIter sub2;
 883                         uint32_t uid;
 884
 885                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 886                                 goto oom;
 887
 888                         uid = user->uid;
 889
 890                         p = user_bus_path(user);
 891                         if (!p)
 892                                 goto oom;
 893
 894                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 895                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &user->name) ||
 896                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 897                                 free(p);
 898                                 goto oom;
 899                         }
 900
 901                         free(p);
 902
 903                         if (!dbus_message_iter_close_container(&sub, &sub2))
 904                                 goto oom;
 905                 }
 906
 907                 if (!dbus_message_iter_close_container(&iter, &sub))
 908                         goto oom;
 909
 910         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSeats")) {
 911                 char *p;
 912                 Seat *seat;
 913                 Iterator i;
 914                 DBusMessageIter iter, sub;
 915
 916                 reply = dbus_message_new_method_return(message);
 917                 if (!reply)
 918                         goto oom;
 919
 920                 dbus_message_iter_init_append(reply, &iter);
 921
 922                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(so)", &sub))
 923                         goto oom;
 924
 925                 HASHMAP_FOREACH(seat, m->seats, i) {
 926                         DBusMessageIter sub2;
 927
 928                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 929                                 goto oom;
 930
 931                         p = seat_bus_path(seat);
 932                         if (!p)
 933                                 goto oom;
 934
 935                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &seat->id) ||
 936                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 937                                 free(p);
 938                                 goto oom;
 939                         }
 940
 941                         free(p);
 942
 943                         if (!dbus_message_iter_close_container(&sub, &sub2))
 944                                 goto oom;
 945                 }
 946
 947                 if (!dbus_message_iter_close_container(&iter, &sub))
 948                         goto oom;
 949
 950         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
 951
 952                 r = bus_manager_create_session(m, message, &reply);
 953                 if (r == -ENOMEM)
 954                         goto oom;
 955
 956                 if (r < 0)
 957                         return bus_send_error_reply(connection, message, &error, r);
 958
 959         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
 960                 const char *name;
 961                 Session *session;
 962
 963                 if (!dbus_message_get_args(
 964                                     message,
 965                                     &error,
 966                                     DBUS_TYPE_STRING, &name,
 967                                     DBUS_TYPE_INVALID))
 968                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 969
 970                 session = hashmap_get(m->sessions, name);
 971                 if (!session)
 972                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 973
 974                 r = session_activate(session);
 975                 if (r < 0)
 976                         return bus_send_error_reply(connection, message, NULL, r);
 977
 978                 reply = dbus_message_new_method_return(message);
 979                 if (!reply)
 980                         goto oom;
 981
 982         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSession")) {
 983                 const char *name;
 984                 Session *session;
 985
 986                 if (!dbus_message_get_args(
 987                                     message,
 988                                     &error,
 989                                     DBUS_TYPE_STRING, &name,
 990                                     DBUS_TYPE_INVALID))
 991                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 992
 993                 session = hashmap_get(m->sessions, name);
 994                 if (!session)
 995                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 996
 997                 r = session_stop(session);
 998                 if (r < 0)
 999                         return bus_send_error_reply(connection, message, NULL, r);
1000
1001                 reply = dbus_message_new_method_return(message);
1002                 if (!reply)
1003                         goto oom;
1004
1005         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateUser")) {
1006                 uint32_t uid;
1007                 User *user;
1008
1009                 if (!dbus_message_get_args(
1010                                     message,
1011                                     &error,
1012                                     DBUS_TYPE_UINT32, &uid,
1013                                     DBUS_TYPE_INVALID))
1014                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1015
1016                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
1017                 if (!user)
1018                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1019
1020                 r = user_stop(user);
1021                 if (r < 0)
1022                         return bus_send_error_reply(connection, message, NULL, r);
1023
1024                 reply = dbus_message_new_method_return(message);
1025                 if (!reply)
1026                         goto oom;
1027
1028         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSeat")) {
1029                 const char *name;
1030                 Seat *seat;
1031
1032                 if (!dbus_message_get_args(
1033                                     message,
1034                                     &error,
1035                                     DBUS_TYPE_STRING, &name,
1036                                     DBUS_TYPE_INVALID))
1037                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1038
1039                 seat = hashmap_get(m->seats, name);
1040                 if (!seat)
1041                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1042
1043                 r = seat_stop_sessions(seat);
1044                 if (r < 0)
1045                         return bus_send_error_reply(connection, message, NULL, r);
1046
1047                 reply = dbus_message_new_method_return(message);
1048                 if (!reply)
1049                         goto oom;
1050
1051         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "SetUserLinger")) {
1052                 uint32_t uid;
1053                 struct passwd *pw;
1054                 dbus_bool_t b, interactive;
1055                 char *path;
1056
1057                 if (!dbus_message_get_args(
1058                                     message,
1059                                     &error,
1060                                     DBUS_TYPE_UINT32, &uid,
1061                                     DBUS_TYPE_BOOLEAN, &b,
1062                                     DBUS_TYPE_BOOLEAN, &interactive,
1063                                     DBUS_TYPE_INVALID))
1064                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1065
1066                 errno = 0;
1067                 pw = getpwuid(uid);
1068                 if (!pw)
1069                         return bus_send_error_reply(connection, message, NULL, errno ? -errno : -EINVAL);
1070
1071                 r = verify_polkit(connection, message, "org.freedesktop.login1.set-user-linger", interactive, &error);
1072                 if (r < 0)
1073                         return bus_send_error_reply(connection, message, &error, r);
1074
1075                 r = safe_mkdir("/var/lib/systemd/linger", 0755, 0, 0);
1076                 if (r < 0)
1077                         return bus_send_error_reply(connection, message, &error, r);
1078
1079                 path = strappend("/var/lib/systemd/linger/", pw->pw_name);
1080                 if (!path)
1081                         goto oom;
1082
1083                 if (b) {
1084                         User *u;
1085
1086                         r = touch(path);
1087                         free(path);
1088
1089                         if (r < 0)
1090                                 return bus_send_error_reply(connection, message, &error, r);
1091
1092                         if (manager_add_user_by_uid(m, uid, &u) >= 0)
1093                                 user_start(u);
1094
1095                 } else {
1096                         User *u;
1097
1098                         r = unlink(path);
1099                         free(path);
1100
1101                         if (r < 0 && errno != ENOENT)
1102                                 return bus_send_error_reply(connection, message, &error, -errno);
1103
1104                         u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
1105                         if (u)
1106                                 user_add_to_gc_queue(u);
1107                 }
1108
1109                 reply = dbus_message_new_method_return(message);
1110                 if (!reply)
1111                         goto oom;
1112
1113         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "AttachDevice")) {
1114                 const char *sysfs, *seat;
1115                 dbus_bool_t interactive;
1116
1117                 if (!dbus_message_get_args(
1118                                     message,
1119                                     &error,
1120                                     DBUS_TYPE_STRING, &seat,
1121                                     DBUS_TYPE_STRING, &sysfs,
1122                                     DBUS_TYPE_BOOLEAN, &interactive,
1123                                     DBUS_TYPE_INVALID))
1124                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1125
1126                 if (!path_startswith(sysfs, "/sys") || !seat_name_is_valid(seat))
1127                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1128
1129                 r = verify_polkit(connection, message, "org.freedesktop.login1.attach-device", interactive, &error);
1130                 if (r < 0)
1131                         return bus_send_error_reply(connection, message, &error, r);
1132
1133                 r = attach_device(m, seat, sysfs);
1134                 if (r < 0)
1135                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1136
1137                 reply = dbus_message_new_method_return(message);
1138                 if (!reply)
1139                         goto oom;
1140
1141
1142         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "FlushDevices")) {
1143                 dbus_bool_t interactive;
1144
1145                 if (!dbus_message_get_args(
1146                                     message,
1147                                     &error,
1148                                     DBUS_TYPE_BOOLEAN, &interactive,
1149                                     DBUS_TYPE_INVALID))
1150                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1151
1152                 r = verify_polkit(connection, message, "org.freedesktop.login1.flush-devices", interactive, &error);
1153                 if (r < 0)
1154                         return bus_send_error_reply(connection, message, &error, r);
1155
1156                 r = flush_devices(m);
1157                 if (r < 0)
1158                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1159
1160                 reply = dbus_message_new_method_return(message);
1161                 if (!reply)
1162                         goto oom;
1163
1164         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
1165                 char *introspection = NULL;
1166                 FILE *f;
1167                 Iterator i;
1168                 Session *session;
1169                 Seat *seat;
1170                 User *user;
1171                 size_t size;
1172                 char *p;
1173
1174                 if (!(reply = dbus_message_new_method_return(message)))
1175                         goto oom;
1176
1177                 /* We roll our own introspection code here, instead of
1178                  * relying on bus_default_message_handler() because we
1179                  * need to generate our introspection string
1180                  * dynamically. */
1181
1182                 if (!(f = open_memstream(&introspection, &size)))
1183                         goto oom;
1184
1185                 fputs(INTROSPECTION_BEGIN, f);
1186
1187                 HASHMAP_FOREACH(seat, m->seats, i) {
1188                         p = bus_path_escape(seat->id);
1189
1190                         if (p) {
1191                                 fprintf(f, "<node name=\"seat/%s\"/>", p);
1192                                 free(p);
1193                         }
1194                 }
1195
1196                 HASHMAP_FOREACH(user, m->users, i)
1197                         fprintf(f, "<node name=\"user/%llu\"/>", (unsigned long long) user->uid);
1198
1199                 HASHMAP_FOREACH(session, m->sessions, i) {
1200                         p = bus_path_escape(session->id);
1201
1202                         if (p) {
1203                                 fprintf(f, "<node name=\"session/%s\"/>", p);
1204                                 free(p);
1205                         }
1206                 }
1207
1208                 fputs(INTROSPECTION_END, f);
1209
1210                 if (ferror(f)) {
1211                         fclose(f);
1212                         free(introspection);
1213                         goto oom;
1214                 }
1215
1216                 fclose(f);
1217
1218                 if (!introspection)
1219                         goto oom;
1220
1221                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
1222                         free(introspection);
1223                         goto oom;
1224                 }
1225
1226                 free(introspection);
1227         } else
1228                 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, properties);
1229
1230         if (reply) {
1231                 if (!dbus_connection_send(connection, reply, NULL))
1232                         goto oom;
1233
1234                 dbus_message_unref(reply);
1235         }
1236
1237         return DBUS_HANDLER_RESULT_HANDLED;
1238
1239 oom:
1240         if (reply)
1241                 dbus_message_unref(reply);
1242
1243         dbus_error_free(&error);
1244
1245         return DBUS_HANDLER_RESULT_NEED_MEMORY;
1246 }
1247
1248 const DBusObjectPathVTable bus_manager_vtable = {
1249         .message_function = manager_message_handler
1250 };
1251
1252 DBusHandlerResult bus_message_filter(
1253                 DBusConnection *connection,
1254                 DBusMessage *message,
1255                 void *userdata) {
1256
1257         Manager *m = userdata;
1258         DBusError error;
1259
1260         assert(m);
1261         assert(connection);
1262         assert(message);
1263
1264         dbus_error_init(&error);
1265
1266         if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
1267                 const char *cgroup;
1268
1269                 if (!dbus_message_get_args(message, &error,
1270                                            DBUS_TYPE_STRING, &cgroup,
1271                                            DBUS_TYPE_INVALID))
1272                         log_error("Failed to parse Released message: %s", bus_error_message(&error));
1273                 else
1274                         manager_cgroup_notify_empty(m, cgroup);
1275         }
1276
1277         dbus_error_free(&error);
1278
1279         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1280 }
1281
1282 int manager_send_changed(Manager *manager, const char *properties) {
1283         DBusMessage *m;
1284         int r = -ENOMEM;
1285
1286         assert(manager);
1287
1288         m = bus_properties_changed_new("/org/freedesktop/login1", "org.freedesktop.login1.Manager", properties);
1289         if (!m)
1290                 goto finish;
1291
1292         if (!dbus_connection_send(manager->bus, m, NULL))
1293                 goto finish;
1294
1295         r = 0;
1296
1297 finish:
1298         if (m)
1299                 dbus_message_unref(m);
1300
1301         return r;
1302 }