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, *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         else
 312                 asprintf(&id, "c%lu", ++m->session_counter);
 313
 314         if (!id) {
 315                 r = -ENOMEM;
 316                 goto fail;
 317         }
 318
 319         if (hashmap_get(m->sessions, id)) {
 320                 r = -EEXIST;
 321                 goto fail;
 322         }
 323
 324         r = manager_add_session(m, user, id, &session);
 325         free(id);
 326         if (r < 0)
 327                 goto fail;
 328
 329         session->leader = leader;
 330         session->audit_id = audit_id;
 331         session->type = t;
 332         session->remote = remote;
 333         session->controllers = controllers;
 334         session->reset_controllers = reset_controllers;
 335         session->kill_processes = kill_processes;
 336         session->vtnr = vtnr;
 337
 338         controllers = reset_controllers = NULL;
 339
 340         if (!isempty(tty)) {
 341                 session->tty = strdup(tty);
 342                 if (!session->tty) {
 343                         r = -ENOMEM;
 344                         goto fail;
 345                 }
 346         }
 347
 348         if (!isempty(display)) {
 349                 session->display = strdup(display);
 350                 if (!session->display) {
 351                         r = -ENOMEM;
 352                         goto fail;
 353                 }
 354         }
 355
 356         if (!isempty(remote_user)) {
 357                 session->remote_user = strdup(remote_user);
 358                 if (!session->remote_user) {
 359                         r = -ENOMEM;
 360                         goto fail;
 361                 }
 362         }
 363
 364         if (!isempty(remote_host)) {
 365                 session->remote_host = strdup(remote_host);
 366                 if (!session->remote_host) {
 367                         r = -ENOMEM;
 368                         goto fail;
 369                 }
 370         }
 371
 372         if (!isempty(service)) {
 373                 session->service = strdup(service);
 374                 if (!session->service) {
 375                         r = -ENOMEM;
 376                         goto fail;
 377                 }
 378         }
 379
 380         if (pipe(pipe_fds) < 0) {
 381                 r = -errno;
 382                 goto fail;
 383         }
 384
 385         session->pipe_fd = pipe_fds[0];
 386         pipe_fds[0] = -1;
 387
 388         if (s) {
 389                 r = seat_attach_session(s, session);
 390                 if (r < 0)
 391                         goto fail;
 392         }
 393
 394         r = session_start(session);
 395         if (r < 0)
 396                 goto fail;
 397
 398         reply = dbus_message_new_method_return(message);
 399         if (!reply) {
 400                 r = -ENOMEM;
 401                 goto fail;
 402         }
 403
 404         p = session_bus_path(session);
 405         if (!p) {
 406                 r = -ENOMEM;
 407                 goto fail;
 408         }
 409
 410         b = dbus_message_append_args(
 411                         reply,
 412                         DBUS_TYPE_STRING, &session->id,
 413                         DBUS_TYPE_OBJECT_PATH, &p,
 414                         DBUS_TYPE_STRING, &session->user->runtime_path,
 415                         DBUS_TYPE_UNIX_FD, &pipe_fds[1],
 416                         DBUS_TYPE_INVALID);
 417         free(p);
 418
 419         if (!b) {
 420                 r = -ENOMEM;
 421                 goto fail;
 422         }
 423
 424         close_nointr_nofail(pipe_fds[1]);
 425         *_reply = reply;
 426
 427         return 0;
 428
 429 fail:
 430         strv_free(controllers);
 431         strv_free(reset_controllers);
 432
 433         if (session)
 434                 session_add_to_gc_queue(session);
 435
 436         if (user)
 437                 user_add_to_gc_queue(user);
 438
 439         close_pipe(pipe_fds);
 440
 441         if (reply)
 442                 dbus_message_unref(reply);
 443
 444         return r;
 445 }
 446
 447 static DBusHandlerResult manager_message_handler(
 448                 DBusConnection *connection,
 449                 DBusMessage *message,
 450                 void *userdata) {
 451
 452         Manager *m = userdata;
 453
 454         const BusProperty properties[] = {
 455                 { "org.freedesktop.login1.Manager", "ControlGroupHierarchy",  bus_property_append_string,   "s",  m->cgroup_path          },
 456                 { "org.freedesktop.login1.Manager", "Controllers",            bus_property_append_strv,     "as", m->controllers          },
 457                 { "org.freedesktop.login1.Manager", "NAutoVTs",               bus_property_append_unsigned, "u",  &m->n_autovts           },
 458                 { "org.freedesktop.login1.Manager", "KillOnlyUsers",          bus_property_append_strv,     "as", m->kill_only_users      },
 459                 { "org.freedesktop.login1.Manager", "KillExcludeUsers",       bus_property_append_strv,     "as", m->kill_exclude_users   },
 460                 { "org.freedesktop.login1.Manager", "KillUserProcesses",      bus_property_append_bool,     "b",  &m->kill_user_processes },
 461                 { "org.freedesktop.login1.Manager", "IdleHint",               bus_manager_append_idle_hint, "b",  m                       },
 462                 { "org.freedesktop.login1.Manager", "IdleSinceHint",          bus_manager_append_idle_hint_since, "t", m                  },
 463                 { "org.freedesktop.login1.Manager", "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", m                  },
 464                 { NULL, NULL, NULL, NULL, NULL }
 465         };
 466
 467         DBusError error;
 468         DBusMessage *reply = NULL;
 469         int r;
 470
 471         assert(connection);
 472         assert(message);
 473         assert(m);
 474
 475         dbus_error_init(&error);
 476
 477         if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSession")) {
 478                 const char *name;
 479                 char *p;
 480                 Session *session;
 481                 bool b;
 482
 483                 if (!dbus_message_get_args(
 484                                     message,
 485                                     &error,
 486                                     DBUS_TYPE_STRING, &name,
 487                                     DBUS_TYPE_INVALID))
 488                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 489
 490                 session = hashmap_get(m->sessions, name);
 491                 if (!session)
 492                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 493
 494                 reply = dbus_message_new_method_return(message);
 495                 if (!reply)
 496                         goto oom;
 497
 498                 p = session_bus_path(session);
 499                 if (!p)
 500                         goto oom;
 501
 502                 b = dbus_message_append_args(
 503                                 reply,
 504                                 DBUS_TYPE_OBJECT_PATH, &p,
 505                                 DBUS_TYPE_INVALID);
 506                 free(p);
 507
 508                 if (!b)
 509                         goto oom;
 510
 511         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetUser")) {
 512                 uint32_t uid;
 513                 char *p;
 514                 User *user;
 515                 bool b;
 516
 517                 if (!dbus_message_get_args(
 518                                     message,
 519                                     &error,
 520                                     DBUS_TYPE_UINT32, &uid,
 521                                     DBUS_TYPE_INVALID))
 522                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 523
 524                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 525                 if (!user)
 526                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 527
 528                 reply = dbus_message_new_method_return(message);
 529                 if (!reply)
 530                         goto oom;
 531
 532                 p = user_bus_path(user);
 533                 if (!p)
 534                         goto oom;
 535
 536                 b = dbus_message_append_args(
 537                                 reply,
 538                                 DBUS_TYPE_OBJECT_PATH, &p,
 539                                 DBUS_TYPE_INVALID);
 540                 free(p);
 541
 542                 if (!b)
 543                         goto oom;
 544
 545         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSeat")) {
 546                 const char *name;
 547                 char *p;
 548                 Seat *seat;
 549                 bool b;
 550
 551                 if (!dbus_message_get_args(
 552                                     message,
 553                                     &error,
 554                                     DBUS_TYPE_STRING, &name,
 555                                     DBUS_TYPE_INVALID))
 556                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 557
 558                 seat = hashmap_get(m->seats, name);
 559                 if (!seat)
 560                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 561
 562                 reply = dbus_message_new_method_return(message);
 563                 if (!reply)
 564                         goto oom;
 565
 566                 p = seat_bus_path(seat);
 567                 if (!p)
 568                         goto oom;
 569
 570                 b = dbus_message_append_args(
 571                                 reply,
 572                                 DBUS_TYPE_OBJECT_PATH, &p,
 573                                 DBUS_TYPE_INVALID);
 574                 free(p);
 575
 576                 if (!b)
 577                         goto oom;
 578
 579         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSessions")) {
 580                 char *p;
 581                 Session *session;
 582                 Iterator i;
 583                 DBusMessageIter iter, sub;
 584                 const char *empty = "";
 585
 586                 reply = dbus_message_new_method_return(message);
 587                 if (!reply)
 588                         goto oom;
 589
 590                 dbus_message_iter_init_append(reply, &iter);
 591
 592                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(susso)", &sub))
 593                         goto oom;
 594
 595                 HASHMAP_FOREACH(session, m->sessions, i) {
 596                         DBusMessageIter sub2;
 597                         uint32_t uid;
 598
 599                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 600                                 goto oom;
 601
 602                         uid = session->user->uid;
 603
 604                         p = session_bus_path(session);
 605                         if (!p)
 606                                 goto oom;
 607
 608                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) ||
 609                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 610                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->user->name) ||
 611                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, session->seat ? (const char**) &session->seat->id : &empty) ||
 612                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 613                                 free(p);
 614                                 goto oom;
 615                         }
 616
 617                         free(p);
 618
 619                         if (!dbus_message_iter_close_container(&sub, &sub2))
 620                                 goto oom;
 621                 }
 622
 623                 if (!dbus_message_iter_close_container(&iter, &sub))
 624                         goto oom;
 625
 626         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListUsers")) {
 627                 char *p;
 628                 User *user;
 629                 Iterator i;
 630                 DBusMessageIter iter, sub;
 631
 632                 reply = dbus_message_new_method_return(message);
 633                 if (!reply)
 634                         goto oom;
 635
 636                 dbus_message_iter_init_append(reply, &iter);
 637
 638                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(uso)", &sub))
 639                         goto oom;
 640
 641                 HASHMAP_FOREACH(user, m->users, i) {
 642                         DBusMessageIter sub2;
 643                         uint32_t uid;
 644
 645                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 646                                 goto oom;
 647
 648                         uid = user->uid;
 649
 650                         p = user_bus_path(user);
 651                         if (!p)
 652                                 goto oom;
 653
 654                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 655                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &user->name) ||
 656                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 657                                 free(p);
 658                                 goto oom;
 659                         }
 660
 661                         free(p);
 662
 663                         if (!dbus_message_iter_close_container(&sub, &sub2))
 664                                 goto oom;
 665                 }
 666
 667                 if (!dbus_message_iter_close_container(&iter, &sub))
 668                         goto oom;
 669
 670         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSeats")) {
 671                 char *p;
 672                 Seat *seat;
 673                 Iterator i;
 674                 DBusMessageIter iter, sub;
 675
 676                 reply = dbus_message_new_method_return(message);
 677                 if (!reply)
 678                         goto oom;
 679
 680                 dbus_message_iter_init_append(reply, &iter);
 681
 682                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(so)", &sub))
 683                         goto oom;
 684
 685                 HASHMAP_FOREACH(seat, m->seats, i) {
 686                         DBusMessageIter sub2;
 687
 688                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 689                                 goto oom;
 690
 691                         p = seat_bus_path(seat);
 692                         if (!p)
 693                                 goto oom;
 694
 695                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &seat->id) ||
 696                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 697                                 free(p);
 698                                 goto oom;
 699                         }
 700
 701                         free(p);
 702
 703                         if (!dbus_message_iter_close_container(&sub, &sub2))
 704                                 goto oom;
 705                 }
 706
 707                 if (!dbus_message_iter_close_container(&iter, &sub))
 708                         goto oom;
 709
 710         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
 711
 712                 r = bus_manager_create_session(m, message, &reply);
 713                 if (r == -ENOMEM)
 714                         goto oom;
 715
 716                 if (r < 0)
 717                         return bus_send_error_reply(connection, message, &error, r);
 718
 719         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
 720                 const char *name;
 721                 Session *session;
 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                 r = session_activate(session);
 735                 if (r < 0)
 736                         return bus_send_error_reply(connection, message, NULL, r);
 737
 738                 reply = dbus_message_new_method_return(message);
 739                 if (!reply)
 740                         goto oom;
 741
 742         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSession")) {
 743                 const char *name;
 744                 Session *session;
 745
 746                 if (!dbus_message_get_args(
 747                                     message,
 748                                     &error,
 749                                     DBUS_TYPE_STRING, &name,
 750                                     DBUS_TYPE_INVALID))
 751                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 752
 753                 session = hashmap_get(m->sessions, name);
 754                 if (!session)
 755                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 756
 757                 r = session_stop(session);
 758                 if (r < 0)
 759                         return bus_send_error_reply(connection, message, NULL, r);
 760
 761                 reply = dbus_message_new_method_return(message);
 762                 if (!reply)
 763                         goto oom;
 764
 765         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateUser")) {
 766                 uint32_t uid;
 767                 User *user;
 768
 769                 if (!dbus_message_get_args(
 770                                     message,
 771                                     &error,
 772                                     DBUS_TYPE_UINT32, &uid,
 773                                     DBUS_TYPE_INVALID))
 774                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 775
 776                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 777                 if (!user)
 778                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 779
 780                 r = user_stop(user);
 781                 if (r < 0)
 782                         return bus_send_error_reply(connection, message, NULL, r);
 783
 784                 reply = dbus_message_new_method_return(message);
 785                 if (!reply)
 786                         goto oom;
 787
 788         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSeat")) {
 789                 const char *name;
 790                 Seat *seat;
 791
 792                 if (!dbus_message_get_args(
 793                                     message,
 794                                     &error,
 795                                     DBUS_TYPE_STRING, &name,
 796                                     DBUS_TYPE_INVALID))
 797                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 798
 799                 seat = hashmap_get(m->seats, name);
 800                 if (!seat)
 801                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 802
 803                 r = seat_stop_sessions(seat);
 804                 if (r < 0)
 805                         return bus_send_error_reply(connection, message, NULL, r);
 806
 807                 reply = dbus_message_new_method_return(message);
 808                 if (!reply)
 809                         goto oom;
 810
 811         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 812                 char *introspection = NULL;
 813                 FILE *f;
 814                 Iterator i;
 815                 Session *session;
 816                 Seat *seat;
 817                 User *user;
 818                 size_t size;
 819                 char *p;
 820
 821                 if (!(reply = dbus_message_new_method_return(message)))
 822                         goto oom;
 823
 824                 /* We roll our own introspection code here, instead of
 825                  * relying on bus_default_message_handler() because we
 826                  * need to generate our introspection string
 827                  * dynamically. */
 828
 829                 if (!(f = open_memstream(&introspection, &size)))
 830                         goto oom;
 831
 832                 fputs(INTROSPECTION_BEGIN, f);
 833
 834                 HASHMAP_FOREACH(seat, m->seats, i) {
 835                         p = bus_path_escape(seat->id);
 836
 837                         if (p) {
 838                                 fprintf(f, "<node name=\"seat/%s\"/>", p);
 839                                 free(p);
 840                         }
 841                 }
 842
 843                 HASHMAP_FOREACH(user, m->users, i)
 844                         fprintf(f, "<node name=\"user/%llu\"/>", (unsigned long long) user->uid);
 845
 846                 HASHMAP_FOREACH(session, m->sessions, i) {
 847                         p = bus_path_escape(session->id);
 848
 849                         if (p) {
 850                                 fprintf(f, "<node name=\"session/%s\"/>", p);
 851                                 free(p);
 852                         }
 853                 }
 854
 855                 fputs(INTROSPECTION_END, f);
 856
 857                 if (ferror(f)) {
 858                         fclose(f);
 859                         free(introspection);
 860                         goto oom;
 861                 }
 862
 863                 fclose(f);
 864
 865                 if (!introspection)
 866                         goto oom;
 867
 868                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 869                         free(introspection);
 870                         goto oom;
 871                 }
 872
 873                 free(introspection);
 874         } else
 875                 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, properties);
 876
 877         if (reply) {
 878                 if (!dbus_connection_send(connection, reply, NULL))
 879                         goto oom;
 880
 881                 dbus_message_unref(reply);
 882         }
 883
 884         return DBUS_HANDLER_RESULT_HANDLED;
 885
 886 oom:
 887         if (reply)
 888                 dbus_message_unref(reply);
 889
 890         dbus_error_free(&error);
 891
 892         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 893 }
 894
 895 const DBusObjectPathVTable bus_manager_vtable = {
 896         .message_function = manager_message_handler
 897 };
 898
 899 DBusHandlerResult bus_message_filter(
 900                 DBusConnection *connection,
 901                 DBusMessage *message,
 902                 void *userdata) {
 903
 904         Manager *m = userdata;
 905         DBusError error;
 906
 907         assert(m);
 908         assert(connection);
 909         assert(message);
 910
 911         dbus_error_init(&error);
 912
 913         if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
 914                 const char *cgroup;
 915
 916                 if (!dbus_message_get_args(message, &error,
 917                                            DBUS_TYPE_STRING, &cgroup,
 918                                            DBUS_TYPE_INVALID))
 919                         log_error("Failed to parse Released message: %s", bus_error_message(&error));
 920                 else
 921                         manager_cgroup_notify_empty(m, cgroup);
 922         }
 923
 924         dbus_error_free(&error);
 925
 926         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 927 }
 928
 929 int manager_send_changed(Manager *manager, const char *properties) {
 930         DBusMessage *m;
 931         int r = -ENOMEM;
 932
 933         assert(manager);
 934
 935         m = bus_properties_changed_new("/org/freedesktop/login1", "org.freedesktop.login1.Manager", properties);
 936         if (!m)
 937                 goto finish;
 938
 939         if (!dbus_connection_send(manager->bus, m, NULL))
 940                 goto finish;
 941
 942         r = 0;
 943
 944 finish:
 945         if (m)
 946                 dbus_message_unref(m);
 947
 948         return r;
 949 }