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
  26 #include "logind.h"
  27 #include "dbus-common.h"
  28 #include "strv.h"
  29
  30 #define BUS_MANAGER_INTERFACE                                           \
  31         " <interface name=\"org.freedesktop.login1.Manager\">\n"        \
  32         "  <method name=\"GetSession\">\n"                              \
  33         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  34         "   <arg name=\"session\" type=\"o\" direction=\"out\"/>\n"     \
  35         "  </method>\n"                                                 \
  36         "  <method name=\"GetUser\">\n"                                 \
  37         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  38         "   <arg name=\"user\" type=\"o\" direction=\"out\"/>\n"        \
  39         "  </method>\n"                                                 \
  40         "  <method name=\"GetSeat\">\n"                                 \
  41         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  42         "   <arg name=\"seat\" type=\"o\" direction=\"out\"/>\n"        \
  43         "  </method>\n"                                                 \
  44         "  <method name=\"ListSessions\">\n"                            \
  45         "   <arg name=\"sessions\" type=\"a(susso)\" direction=\"out\"/>\n" \
  46         "  </method>\n"                                                 \
  47         "  <method name=\"ListUsers\">\n"                               \
  48         "   <arg name=\"users\" type=\"a(uso)\" direction=\"out\"/>\n"  \
  49         "  </method>\n"                                                 \
  50         "  <method name=\"ListSeats\">\n"                               \
  51         "   <arg name=\"seats\" type=\"a(so)\" direction=\"out\"/>\n"   \
  52         "  </method>\n"                                                 \
  53         "  <method name=\"CreateSession\">\n"                           \
  54         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  55         "   <arg name=\"leader\" type=\"u\" direction=\"in\"/>\n"       \
  56         "   <arg name=\"sevice\" type=\"s\" direction=\"in\"/>\n"         \
  57         "   <arg name=\"type\" type=\"s\" direction=\"in\"/>\n"         \
  58         "   <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n"         \
  59         "   <arg name=\"tty\" type=\"s\" direction=\"in\"/>\n"          \
  60         "   <arg name=\"display\" type=\"s\" direction=\"in\"/>\n"      \
  61         "   <arg name=\"remote\" type=\"b\" direction=\"in\"/>\n"       \
  62         "   <arg name=\"remote_user\" type=\"s\" direction=\"in\"/>\n"  \
  63         "   <arg name=\"remote_host\" type=\"s\" direction=\"in\"/>\n"  \
  64         "   <arg name=\"controllers\" type=\"as\" direction=\"in\"/>\n" \
  65         "   <arg name=\"reset_controllers\" type=\"as\" direction=\"in\"/>\n" \
  66         "   <arg name=\"kill_processes\" type=\"b\" direction=\"in\"/>\n" \
  67         "   <arg name=\"id\" type=\"s\" direction=\"out\"/>\n"          \
  68         "   <arg name=\"path\" type=\"o\" direction=\"out\"/>\n"        \
  69         "   <arg name=\"runtime_path\" type=\"o\" direction=\"out\"/>\n" \
  70         "   <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n"          \
  71         "  </method>\n"                                                 \
  72         "  <method name=\"ActivateSession\">\n"                         \
  73         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  74         "  </method>\n"                                                 \
  75         "  <method name=\"TerminateSession\">\n"                        \
  76         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  77         "  </method>\n"                                                 \
  78         "  <method name=\"TerminateUser\">\n"                           \
  79         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  80         "  </method>\n"                                                 \
  81         "  <method name=\"TerminateSeat\">\n"                           \
  82         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  83         "  </method>\n"                                                 \
  84         "  <signal name=\"SessionNew\">\n"                              \
  85         "   <arg name=\"id\" type=\"s\"/>\n"                            \
  86         "   <arg name=\"path\" type=\"o\"/>\n"                          \
  87         "  </signal>\n"                                                 \
  88         "  <signal name=\"SessionRemoved\">\n"                          \
  89         "   <arg name=\"id\" type=\"s\"/>\n"                            \
  90         "   <arg name=\"path\" type=\"o\"/>\n"                          \
  91         "  </signal>\n"                                                 \
  92         "  <signal name=\"UserNew\">\n"                                 \
  93         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
  94         "   <arg name=\"path\" type=\"o\"/>\n"                          \
  95         "  </signal>\n"                                                 \
  96         "  <signal name=\"UserRemoved\">\n"                             \
  97         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
  98         "   <arg name=\"path\" type=\"o\"/>\n"                          \
  99         "  </signal>\n"                                                 \
 100         "  <signal name=\"SeatNew\">\n"                                 \
 101         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 102         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 103         "  </signal>\n"                                                 \
 104         "  <signal name=\"SeatRemoved\">\n"                             \
 105         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 106         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 107         "  </signal>\n"                                                 \
 108         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 109         "  <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \
 110         "  <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \
 111         "  <property name=\"NAutoVTs\" type=\"u\" access=\"read\"/>\n" \
 112         "  <property name=\"KillOnlyUsers\" type=\"as\" access=\"read\"/>\n" \
 113         "  <property name=\"KillExcludeUsers\" type=\"as\" access=\"read\"/>\n" \
 114         "  <property name=\"KillUserProcesses\" type=\"b\" access=\"read\"/>\n" \
 115         "  <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n"  \
 116         "  <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
 117         "  <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
 118         " </interface>\n"
 119
 120 #define INTROSPECTION_BEGIN                                             \
 121         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 122         "<node>\n"                                                      \
 123         BUS_MANAGER_INTERFACE                                           \
 124         BUS_PROPERTIES_INTERFACE                                        \
 125         BUS_PEER_INTERFACE                                              \
 126         BUS_INTROSPECTABLE_INTERFACE
 127
 128 #define INTROSPECTION_END                                               \
 129         "</node>\n"
 130
 131 #define INTERFACES_LIST                              \
 132         BUS_GENERIC_INTERFACES_LIST                  \
 133         "org.freedesktop.login1.Manager\0"
 134
 135 static int bus_manager_append_idle_hint(DBusMessageIter *i, const char *property, void *data) {
 136         Manager *m = data;
 137         dbus_bool_t b;
 138
 139         assert(i);
 140         assert(property);
 141         assert(m);
 142
 143         b = manager_get_idle_hint(m, NULL) > 0;
 144         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
 145                 return -ENOMEM;
 146
 147         return 0;
 148 }
 149
 150 static int bus_manager_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) {
 151         Manager *m = data;
 152         dual_timestamp t;
 153         uint64_t u;
 154
 155         assert(i);
 156         assert(property);
 157         assert(m);
 158
 159         manager_get_idle_hint(m, &t);
 160         u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
 161
 162         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
 163                 return -ENOMEM;
 164
 165         return 0;
 166 }
 167
 168 static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMessage **_reply) {
 169         Session *session = NULL;
 170         User *user = NULL;
 171         const char *type, *seat, *tty, *display, *remote_user, *remote_host, *service;
 172         uint32_t uid, leader, audit_id = 0;
 173         dbus_bool_t remote, kill_processes;
 174         char **controllers = NULL, **reset_controllers = NULL;
 175         SessionType t;
 176         Seat *s;
 177         DBusMessageIter iter;
 178         int r;
 179         char *id = NULL, *p;
 180         int vtnr = -1;
 181         int pipe_fds[2] = { -1, -1 };
 182         DBusMessage *reply = NULL;
 183         bool b;
 184
 185         assert(m);
 186         assert(message);
 187         assert(_reply);
 188
 189         if (!dbus_message_iter_init(message, &iter) ||
 190             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 191                 return -EINVAL;
 192
 193         dbus_message_iter_get_basic(&iter, &uid);
 194
 195         if (!dbus_message_iter_next(&iter) ||
 196             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 197                 return -EINVAL;
 198
 199         dbus_message_iter_get_basic(&iter, &leader);
 200
 201         if (leader <= 0 ||
 202             !dbus_message_iter_next(&iter) ||
 203             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 204                 return -EINVAL;
 205
 206         dbus_message_iter_get_basic(&iter, &service);
 207
 208         if (!dbus_message_iter_next(&iter) ||
 209             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 210                 return -EINVAL;
 211
 212         dbus_message_iter_get_basic(&iter, &type);
 213         t = session_type_from_string(type);
 214
 215         if (t < 0 ||
 216             !dbus_message_iter_next(&iter) ||
 217             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 218                 return -EINVAL;
 219
 220         dbus_message_iter_get_basic(&iter, &seat);
 221
 222         if (isempty(seat))
 223                 s = NULL;
 224         else {
 225                 s = hashmap_get(m->seats, seat);
 226                 if (!s)
 227                         return -ENOENT;
 228         }
 229
 230         if (!dbus_message_iter_next(&iter) ||
 231             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 232                 return -EINVAL;
 233
 234         dbus_message_iter_get_basic(&iter, &tty);
 235
 236         if (tty_is_vc(tty)) {
 237
 238                 if (!s)
 239                         s = m->vtconsole;
 240                 else if (s != m->vtconsole)
 241                         return -EINVAL;
 242
 243                 vtnr = vtnr_from_tty(tty);
 244
 245                 if (vtnr <= 0)
 246                         return vtnr < 0 ? vtnr : -EINVAL;
 247
 248         } else if (s == m->vtconsole)
 249                 return -EINVAL;
 250
 251         if (!dbus_message_iter_next(&iter) ||
 252             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 253                 return -EINVAL;
 254
 255         dbus_message_iter_get_basic(&iter, &display);
 256
 257         if (!dbus_message_iter_next(&iter) ||
 258             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
 259                 return -EINVAL;
 260
 261         dbus_message_iter_get_basic(&iter, &remote);
 262
 263         if (!dbus_message_iter_next(&iter) ||
 264             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 265                 return -EINVAL;
 266
 267         dbus_message_iter_get_basic(&iter, &remote_user);
 268
 269         if (!dbus_message_iter_next(&iter) ||
 270             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 271                 return -EINVAL;
 272
 273         dbus_message_iter_get_basic(&iter, &remote_host);
 274
 275         if (!dbus_message_iter_next(&iter) ||
 276             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 277             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
 278                 return -EINVAL;
 279
 280         r = bus_parse_strv_iter(&iter, &controllers);
 281         if (r < 0)
 282                 return -EINVAL;
 283
 284         if (!dbus_message_iter_next(&iter) ||
 285             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 286             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING) {
 287                 r = -EINVAL;
 288                 goto fail;
 289         }
 290
 291         r = bus_parse_strv_iter(&iter, &reset_controllers);
 292         if (r < 0)
 293                 goto fail;
 294
 295         if (!dbus_message_iter_next(&iter) ||
 296             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) {
 297                 r = -EINVAL;
 298                 goto fail;
 299         }
 300
 301         dbus_message_iter_get_basic(&iter, &kill_processes);
 302
 303         r = manager_add_user_by_uid(m, uid, &user);
 304         if (r < 0)
 305                 goto fail;
 306
 307         audit_session_from_pid(leader, &audit_id);
 308
 309         if (audit_id > 0) {
 310                 asprintf(&id, "%lu", (unsigned long) audit_id);
 311
 312                 if (!id) {
 313                         r = -ENOMEM;
 314                         goto fail;
 315                 }
 316
 317                 session = hashmap_get(m->sessions, id);
 318
 319                 if (session) {
 320
 321                         /* Session already exists, client is probably
 322                          * something like "su" which changes uid but
 323                          * is still the same audit session */
 324
 325                         reply = dbus_message_new_method_return(message);
 326                         if (!reply) {
 327                                 r = -ENOMEM;
 328                                 goto fail;
 329                         }
 330
 331                         /* Create a throw-away fd */
 332                         if (pipe(pipe_fds) < 0) {
 333                                 r = -errno;
 334                                 goto fail;
 335                         }
 336
 337                         close_nointr_nofail(pipe_fds[0]);
 338                         pipe_fds[0] = -1;
 339
 340                         p = session_bus_path(session);
 341                         if (!p) {
 342                                 r = -ENOMEM;
 343                                 goto fail;
 344                         }
 345
 346                         b = dbus_message_append_args(
 347                                         reply,
 348                                         DBUS_TYPE_STRING, &session->id,
 349                                         DBUS_TYPE_OBJECT_PATH, &p,
 350                                         DBUS_TYPE_STRING, &session->user->runtime_path,
 351                                         DBUS_TYPE_UNIX_FD, &pipe_fds[1],
 352                                         DBUS_TYPE_INVALID);
 353                         free(p);
 354
 355                         if (!b) {
 356                                 r = -ENOMEM;
 357                                 goto fail;
 358                         }
 359
 360                         close_nointr_nofail(pipe_fds[1]);
 361                         *_reply = reply;
 362
 363                         return 0;
 364                 }
 365
 366         } else {
 367                 do {
 368                         free(id);
 369                         asprintf(&id, "c%lu", ++m->session_counter);
 370
 371                         if (!id) {
 372                                 r = -ENOMEM;
 373                                 goto fail;
 374                         }
 375
 376                 } while (hashmap_get(m->sessions, id));
 377         }
 378
 379         r = manager_add_session(m, user, id, &session);
 380         free(id);
 381         if (r < 0)
 382                 goto fail;
 383
 384         session->leader = leader;
 385         session->audit_id = audit_id;
 386         session->type = t;
 387         session->remote = remote;
 388         session->controllers = controllers;
 389         session->reset_controllers = reset_controllers;
 390         session->kill_processes = kill_processes;
 391         session->vtnr = vtnr;
 392
 393         controllers = reset_controllers = NULL;
 394
 395         if (!isempty(tty)) {
 396                 session->tty = strdup(tty);
 397                 if (!session->tty) {
 398                         r = -ENOMEM;
 399                         goto fail;
 400                 }
 401         }
 402
 403         if (!isempty(display)) {
 404                 session->display = strdup(display);
 405                 if (!session->display) {
 406                         r = -ENOMEM;
 407                         goto fail;
 408                 }
 409         }
 410
 411         if (!isempty(remote_user)) {
 412                 session->remote_user = strdup(remote_user);
 413                 if (!session->remote_user) {
 414                         r = -ENOMEM;
 415                         goto fail;
 416                 }
 417         }
 418
 419         if (!isempty(remote_host)) {
 420                 session->remote_host = strdup(remote_host);
 421                 if (!session->remote_host) {
 422                         r = -ENOMEM;
 423                         goto fail;
 424                 }
 425         }
 426
 427         if (!isempty(service)) {
 428                 session->service = strdup(service);
 429                 if (!session->service) {
 430                         r = -ENOMEM;
 431                         goto fail;
 432                 }
 433         }
 434
 435         if (pipe(pipe_fds) < 0) {
 436                 r = -errno;
 437                 goto fail;
 438         }
 439
 440         session->pipe_fd = pipe_fds[0];
 441         pipe_fds[0] = -1;
 442
 443         if (s) {
 444                 r = seat_attach_session(s, session);
 445                 if (r < 0)
 446                         goto fail;
 447         }
 448
 449         r = session_start(session);
 450         if (r < 0)
 451                 goto fail;
 452
 453         reply = dbus_message_new_method_return(message);
 454         if (!reply) {
 455                 r = -ENOMEM;
 456                 goto fail;
 457         }
 458
 459         p = session_bus_path(session);
 460         if (!p) {
 461                 r = -ENOMEM;
 462                 goto fail;
 463         }
 464
 465         b = dbus_message_append_args(
 466                         reply,
 467                         DBUS_TYPE_STRING, &session->id,
 468                         DBUS_TYPE_OBJECT_PATH, &p,
 469                         DBUS_TYPE_STRING, &session->user->runtime_path,
 470                         DBUS_TYPE_UNIX_FD, &pipe_fds[1],
 471                         DBUS_TYPE_INVALID);
 472         free(p);
 473
 474         if (!b) {
 475                 r = -ENOMEM;
 476                 goto fail;
 477         }
 478
 479         close_nointr_nofail(pipe_fds[1]);
 480         *_reply = reply;
 481
 482         return 0;
 483
 484 fail:
 485         strv_free(controllers);
 486         strv_free(reset_controllers);
 487
 488         if (session)
 489                 session_add_to_gc_queue(session);
 490
 491         if (user)
 492                 user_add_to_gc_queue(user);
 493
 494         close_pipe(pipe_fds);
 495
 496         if (reply)
 497                 dbus_message_unref(reply);
 498
 499         return r;
 500 }
 501
 502 static DBusHandlerResult manager_message_handler(
 503                 DBusConnection *connection,
 504                 DBusMessage *message,
 505                 void *userdata) {
 506
 507         Manager *m = userdata;
 508
 509         const BusProperty properties[] = {
 510                 { "org.freedesktop.login1.Manager", "ControlGroupHierarchy",  bus_property_append_string,   "s",  m->cgroup_path          },
 511                 { "org.freedesktop.login1.Manager", "Controllers",            bus_property_append_strv,     "as", m->controllers          },
 512                 { "org.freedesktop.login1.Manager", "NAutoVTs",               bus_property_append_unsigned, "u",  &m->n_autovts           },
 513                 { "org.freedesktop.login1.Manager", "KillOnlyUsers",          bus_property_append_strv,     "as", m->kill_only_users      },
 514                 { "org.freedesktop.login1.Manager", "KillExcludeUsers",       bus_property_append_strv,     "as", m->kill_exclude_users   },
 515                 { "org.freedesktop.login1.Manager", "KillUserProcesses",      bus_property_append_bool,     "b",  &m->kill_user_processes },
 516                 { "org.freedesktop.login1.Manager", "IdleHint",               bus_manager_append_idle_hint, "b",  m                       },
 517                 { "org.freedesktop.login1.Manager", "IdleSinceHint",          bus_manager_append_idle_hint_since, "t", m                  },
 518                 { "org.freedesktop.login1.Manager", "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", m                  },
 519                 { NULL, NULL, NULL, NULL, NULL }
 520         };
 521
 522         DBusError error;
 523         DBusMessage *reply = NULL;
 524         int r;
 525
 526         assert(connection);
 527         assert(message);
 528         assert(m);
 529
 530         dbus_error_init(&error);
 531
 532         if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSession")) {
 533                 const char *name;
 534                 char *p;
 535                 Session *session;
 536                 bool b;
 537
 538                 if (!dbus_message_get_args(
 539                                     message,
 540                                     &error,
 541                                     DBUS_TYPE_STRING, &name,
 542                                     DBUS_TYPE_INVALID))
 543                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 544
 545                 session = hashmap_get(m->sessions, name);
 546                 if (!session)
 547                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 548
 549                 reply = dbus_message_new_method_return(message);
 550                 if (!reply)
 551                         goto oom;
 552
 553                 p = session_bus_path(session);
 554                 if (!p)
 555                         goto oom;
 556
 557                 b = dbus_message_append_args(
 558                                 reply,
 559                                 DBUS_TYPE_OBJECT_PATH, &p,
 560                                 DBUS_TYPE_INVALID);
 561                 free(p);
 562
 563                 if (!b)
 564                         goto oom;
 565
 566         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetUser")) {
 567                 uint32_t uid;
 568                 char *p;
 569                 User *user;
 570                 bool b;
 571
 572                 if (!dbus_message_get_args(
 573                                     message,
 574                                     &error,
 575                                     DBUS_TYPE_UINT32, &uid,
 576                                     DBUS_TYPE_INVALID))
 577                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 578
 579                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 580                 if (!user)
 581                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 582
 583                 reply = dbus_message_new_method_return(message);
 584                 if (!reply)
 585                         goto oom;
 586
 587                 p = user_bus_path(user);
 588                 if (!p)
 589                         goto oom;
 590
 591                 b = dbus_message_append_args(
 592                                 reply,
 593                                 DBUS_TYPE_OBJECT_PATH, &p,
 594                                 DBUS_TYPE_INVALID);
 595                 free(p);
 596
 597                 if (!b)
 598                         goto oom;
 599
 600         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSeat")) {
 601                 const char *name;
 602                 char *p;
 603                 Seat *seat;
 604                 bool b;
 605
 606                 if (!dbus_message_get_args(
 607                                     message,
 608                                     &error,
 609                                     DBUS_TYPE_STRING, &name,
 610                                     DBUS_TYPE_INVALID))
 611                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 612
 613                 seat = hashmap_get(m->seats, name);
 614                 if (!seat)
 615                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 616
 617                 reply = dbus_message_new_method_return(message);
 618                 if (!reply)
 619                         goto oom;
 620
 621                 p = seat_bus_path(seat);
 622                 if (!p)
 623                         goto oom;
 624
 625                 b = dbus_message_append_args(
 626                                 reply,
 627                                 DBUS_TYPE_OBJECT_PATH, &p,
 628                                 DBUS_TYPE_INVALID);
 629                 free(p);
 630
 631                 if (!b)
 632                         goto oom;
 633
 634         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSessions")) {
 635                 char *p;
 636                 Session *session;
 637                 Iterator i;
 638                 DBusMessageIter iter, sub;
 639                 const char *empty = "";
 640
 641                 reply = dbus_message_new_method_return(message);
 642                 if (!reply)
 643                         goto oom;
 644
 645                 dbus_message_iter_init_append(reply, &iter);
 646
 647                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(susso)", &sub))
 648                         goto oom;
 649
 650                 HASHMAP_FOREACH(session, m->sessions, i) {
 651                         DBusMessageIter sub2;
 652                         uint32_t uid;
 653
 654                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 655                                 goto oom;
 656
 657                         uid = session->user->uid;
 658
 659                         p = session_bus_path(session);
 660                         if (!p)
 661                                 goto oom;
 662
 663                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) ||
 664                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 665                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->user->name) ||
 666                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, session->seat ? (const char**) &session->seat->id : &empty) ||
 667                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 668                                 free(p);
 669                                 goto oom;
 670                         }
 671
 672                         free(p);
 673
 674                         if (!dbus_message_iter_close_container(&sub, &sub2))
 675                                 goto oom;
 676                 }
 677
 678                 if (!dbus_message_iter_close_container(&iter, &sub))
 679                         goto oom;
 680
 681         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListUsers")) {
 682                 char *p;
 683                 User *user;
 684                 Iterator i;
 685                 DBusMessageIter iter, sub;
 686
 687                 reply = dbus_message_new_method_return(message);
 688                 if (!reply)
 689                         goto oom;
 690
 691                 dbus_message_iter_init_append(reply, &iter);
 692
 693                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(uso)", &sub))
 694                         goto oom;
 695
 696                 HASHMAP_FOREACH(user, m->users, i) {
 697                         DBusMessageIter sub2;
 698                         uint32_t uid;
 699
 700                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 701                                 goto oom;
 702
 703                         uid = user->uid;
 704
 705                         p = user_bus_path(user);
 706                         if (!p)
 707                                 goto oom;
 708
 709                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 710                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &user->name) ||
 711                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 712                                 free(p);
 713                                 goto oom;
 714                         }
 715
 716                         free(p);
 717
 718                         if (!dbus_message_iter_close_container(&sub, &sub2))
 719                                 goto oom;
 720                 }
 721
 722                 if (!dbus_message_iter_close_container(&iter, &sub))
 723                         goto oom;
 724
 725         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSeats")) {
 726                 char *p;
 727                 Seat *seat;
 728                 Iterator i;
 729                 DBusMessageIter iter, sub;
 730
 731                 reply = dbus_message_new_method_return(message);
 732                 if (!reply)
 733                         goto oom;
 734
 735                 dbus_message_iter_init_append(reply, &iter);
 736
 737                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(so)", &sub))
 738                         goto oom;
 739
 740                 HASHMAP_FOREACH(seat, m->seats, i) {
 741                         DBusMessageIter sub2;
 742
 743                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 744                                 goto oom;
 745
 746                         p = seat_bus_path(seat);
 747                         if (!p)
 748                                 goto oom;
 749
 750                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &seat->id) ||
 751                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 752                                 free(p);
 753                                 goto oom;
 754                         }
 755
 756                         free(p);
 757
 758                         if (!dbus_message_iter_close_container(&sub, &sub2))
 759                                 goto oom;
 760                 }
 761
 762                 if (!dbus_message_iter_close_container(&iter, &sub))
 763                         goto oom;
 764
 765         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
 766
 767                 r = bus_manager_create_session(m, message, &reply);
 768                 if (r == -ENOMEM)
 769                         goto oom;
 770
 771                 if (r < 0)
 772                         return bus_send_error_reply(connection, message, &error, r);
 773
 774         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
 775                 const char *name;
 776                 Session *session;
 777
 778                 if (!dbus_message_get_args(
 779                                     message,
 780                                     &error,
 781                                     DBUS_TYPE_STRING, &name,
 782                                     DBUS_TYPE_INVALID))
 783                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 784
 785                 session = hashmap_get(m->sessions, name);
 786                 if (!session)
 787                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 788
 789                 r = session_activate(session);
 790                 if (r < 0)
 791                         return bus_send_error_reply(connection, message, NULL, r);
 792
 793                 reply = dbus_message_new_method_return(message);
 794                 if (!reply)
 795                         goto oom;
 796
 797         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSession")) {
 798                 const char *name;
 799                 Session *session;
 800
 801                 if (!dbus_message_get_args(
 802                                     message,
 803                                     &error,
 804                                     DBUS_TYPE_STRING, &name,
 805                                     DBUS_TYPE_INVALID))
 806                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 807
 808                 session = hashmap_get(m->sessions, name);
 809                 if (!session)
 810                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 811
 812                 r = session_stop(session);
 813                 if (r < 0)
 814                         return bus_send_error_reply(connection, message, NULL, r);
 815
 816                 reply = dbus_message_new_method_return(message);
 817                 if (!reply)
 818                         goto oom;
 819
 820         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateUser")) {
 821                 uint32_t uid;
 822                 User *user;
 823
 824                 if (!dbus_message_get_args(
 825                                     message,
 826                                     &error,
 827                                     DBUS_TYPE_UINT32, &uid,
 828                                     DBUS_TYPE_INVALID))
 829                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 830
 831                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 832                 if (!user)
 833                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 834
 835                 r = user_stop(user);
 836                 if (r < 0)
 837                         return bus_send_error_reply(connection, message, NULL, r);
 838
 839                 reply = dbus_message_new_method_return(message);
 840                 if (!reply)
 841                         goto oom;
 842
 843         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSeat")) {
 844                 const char *name;
 845                 Seat *seat;
 846
 847                 if (!dbus_message_get_args(
 848                                     message,
 849                                     &error,
 850                                     DBUS_TYPE_STRING, &name,
 851                                     DBUS_TYPE_INVALID))
 852                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 853
 854                 seat = hashmap_get(m->seats, name);
 855                 if (!seat)
 856                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 857
 858                 r = seat_stop_sessions(seat);
 859                 if (r < 0)
 860                         return bus_send_error_reply(connection, message, NULL, r);
 861
 862                 reply = dbus_message_new_method_return(message);
 863                 if (!reply)
 864                         goto oom;
 865
 866         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 867                 char *introspection = NULL;
 868                 FILE *f;
 869                 Iterator i;
 870                 Session *session;
 871                 Seat *seat;
 872                 User *user;
 873                 size_t size;
 874                 char *p;
 875
 876                 if (!(reply = dbus_message_new_method_return(message)))
 877                         goto oom;
 878
 879                 /* We roll our own introspection code here, instead of
 880                  * relying on bus_default_message_handler() because we
 881                  * need to generate our introspection string
 882                  * dynamically. */
 883
 884                 if (!(f = open_memstream(&introspection, &size)))
 885                         goto oom;
 886
 887                 fputs(INTROSPECTION_BEGIN, f);
 888
 889                 HASHMAP_FOREACH(seat, m->seats, i) {
 890                         p = bus_path_escape(seat->id);
 891
 892                         if (p) {
 893                                 fprintf(f, "<node name=\"seat/%s\"/>", p);
 894                                 free(p);
 895                         }
 896                 }
 897
 898                 HASHMAP_FOREACH(user, m->users, i)
 899                         fprintf(f, "<node name=\"user/%llu\"/>", (unsigned long long) user->uid);
 900
 901                 HASHMAP_FOREACH(session, m->sessions, i) {
 902                         p = bus_path_escape(session->id);
 903
 904                         if (p) {
 905                                 fprintf(f, "<node name=\"session/%s\"/>", p);
 906                                 free(p);
 907                         }
 908                 }
 909
 910                 fputs(INTROSPECTION_END, f);
 911
 912                 if (ferror(f)) {
 913                         fclose(f);
 914                         free(introspection);
 915                         goto oom;
 916                 }
 917
 918                 fclose(f);
 919
 920                 if (!introspection)
 921                         goto oom;
 922
 923                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 924                         free(introspection);
 925                         goto oom;
 926                 }
 927
 928                 free(introspection);
 929         } else
 930                 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, properties);
 931
 932         if (reply) {
 933                 if (!dbus_connection_send(connection, reply, NULL))
 934                         goto oom;
 935
 936                 dbus_message_unref(reply);
 937         }
 938
 939         return DBUS_HANDLER_RESULT_HANDLED;
 940
 941 oom:
 942         if (reply)
 943                 dbus_message_unref(reply);
 944
 945         dbus_error_free(&error);
 946
 947         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 948 }
 949
 950 const DBusObjectPathVTable bus_manager_vtable = {
 951         .message_function = manager_message_handler
 952 };
 953
 954 DBusHandlerResult bus_message_filter(
 955                 DBusConnection *connection,
 956                 DBusMessage *message,
 957                 void *userdata) {
 958
 959         Manager *m = userdata;
 960         DBusError error;
 961
 962         assert(m);
 963         assert(connection);
 964         assert(message);
 965
 966         dbus_error_init(&error);
 967
 968         if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
 969                 const char *cgroup;
 970
 971                 if (!dbus_message_get_args(message, &error,
 972                                            DBUS_TYPE_STRING, &cgroup,
 973                                            DBUS_TYPE_INVALID))
 974                         log_error("Failed to parse Released message: %s", bus_error_message(&error));
 975                 else
 976                         manager_cgroup_notify_empty(m, cgroup);
 977         }
 978
 979         dbus_error_free(&error);
 980
 981         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 982 }
 983
 984 int manager_send_changed(Manager *manager, const char *properties) {
 985         DBusMessage *m;
 986         int r = -ENOMEM;
 987
 988         assert(manager);
 989
 990         m = bus_properties_changed_new("/org/freedesktop/login1", "org.freedesktop.login1.Manager", properties);
 991         if (!m)
 992                 goto finish;
 993
 994         if (!dbus_connection_send(manager->bus, m, NULL))
 995                 goto finish;
 996
 997         r = 0;
 998
 999 finish:
1000         if (m)
1001                 dbus_message_unref(m);
1002
1003         return r;
1004 }