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                 if (hashmap_get(m->sessions, id)) {
 318                         r = -EEXIST;
 319                         goto fail;
 320                 }
 321
 322         } else {
 323                 do {
 324                         free(id);
 325                         asprintf(&id, "c%lu", ++m->session_counter);
 326
 327                         if (!id) {
 328                                 r = -ENOMEM;
 329                                 goto fail;
 330                         }
 331
 332                 } while (hashmap_get(m->sessions, id));
 333         }
 334
 335         r = manager_add_session(m, user, id, &session);
 336         free(id);
 337         if (r < 0)
 338                 goto fail;
 339
 340         session->leader = leader;
 341         session->audit_id = audit_id;
 342         session->type = t;
 343         session->remote = remote;
 344         session->controllers = controllers;
 345         session->reset_controllers = reset_controllers;
 346         session->kill_processes = kill_processes;
 347         session->vtnr = vtnr;
 348
 349         controllers = reset_controllers = NULL;
 350
 351         if (!isempty(tty)) {
 352                 session->tty = strdup(tty);
 353                 if (!session->tty) {
 354                         r = -ENOMEM;
 355                         goto fail;
 356                 }
 357         }
 358
 359         if (!isempty(display)) {
 360                 session->display = strdup(display);
 361                 if (!session->display) {
 362                         r = -ENOMEM;
 363                         goto fail;
 364                 }
 365         }
 366
 367         if (!isempty(remote_user)) {
 368                 session->remote_user = strdup(remote_user);
 369                 if (!session->remote_user) {
 370                         r = -ENOMEM;
 371                         goto fail;
 372                 }
 373         }
 374
 375         if (!isempty(remote_host)) {
 376                 session->remote_host = strdup(remote_host);
 377                 if (!session->remote_host) {
 378                         r = -ENOMEM;
 379                         goto fail;
 380                 }
 381         }
 382
 383         if (!isempty(service)) {
 384                 session->service = strdup(service);
 385                 if (!session->service) {
 386                         r = -ENOMEM;
 387                         goto fail;
 388                 }
 389         }
 390
 391         if (pipe(pipe_fds) < 0) {
 392                 r = -errno;
 393                 goto fail;
 394         }
 395
 396         session->pipe_fd = pipe_fds[0];
 397         pipe_fds[0] = -1;
 398
 399         if (s) {
 400                 r = seat_attach_session(s, session);
 401                 if (r < 0)
 402                         goto fail;
 403         }
 404
 405         r = session_start(session);
 406         if (r < 0)
 407                 goto fail;
 408
 409         reply = dbus_message_new_method_return(message);
 410         if (!reply) {
 411                 r = -ENOMEM;
 412                 goto fail;
 413         }
 414
 415         p = session_bus_path(session);
 416         if (!p) {
 417                 r = -ENOMEM;
 418                 goto fail;
 419         }
 420
 421         b = dbus_message_append_args(
 422                         reply,
 423                         DBUS_TYPE_STRING, &session->id,
 424                         DBUS_TYPE_OBJECT_PATH, &p,
 425                         DBUS_TYPE_STRING, &session->user->runtime_path,
 426                         DBUS_TYPE_UNIX_FD, &pipe_fds[1],
 427                         DBUS_TYPE_INVALID);
 428         free(p);
 429
 430         if (!b) {
 431                 r = -ENOMEM;
 432                 goto fail;
 433         }
 434
 435         close_nointr_nofail(pipe_fds[1]);
 436         *_reply = reply;
 437
 438         return 0;
 439
 440 fail:
 441         strv_free(controllers);
 442         strv_free(reset_controllers);
 443
 444         if (session)
 445                 session_add_to_gc_queue(session);
 446
 447         if (user)
 448                 user_add_to_gc_queue(user);
 449
 450         close_pipe(pipe_fds);
 451
 452         if (reply)
 453                 dbus_message_unref(reply);
 454
 455         return r;
 456 }
 457
 458 static DBusHandlerResult manager_message_handler(
 459                 DBusConnection *connection,
 460                 DBusMessage *message,
 461                 void *userdata) {
 462
 463         Manager *m = userdata;
 464
 465         const BusProperty properties[] = {
 466                 { "org.freedesktop.login1.Manager", "ControlGroupHierarchy",  bus_property_append_string,   "s",  m->cgroup_path          },
 467                 { "org.freedesktop.login1.Manager", "Controllers",            bus_property_append_strv,     "as", m->controllers          },
 468                 { "org.freedesktop.login1.Manager", "NAutoVTs",               bus_property_append_unsigned, "u",  &m->n_autovts           },
 469                 { "org.freedesktop.login1.Manager", "KillOnlyUsers",          bus_property_append_strv,     "as", m->kill_only_users      },
 470                 { "org.freedesktop.login1.Manager", "KillExcludeUsers",       bus_property_append_strv,     "as", m->kill_exclude_users   },
 471                 { "org.freedesktop.login1.Manager", "KillUserProcesses",      bus_property_append_bool,     "b",  &m->kill_user_processes },
 472                 { "org.freedesktop.login1.Manager", "IdleHint",               bus_manager_append_idle_hint, "b",  m                       },
 473                 { "org.freedesktop.login1.Manager", "IdleSinceHint",          bus_manager_append_idle_hint_since, "t", m                  },
 474                 { "org.freedesktop.login1.Manager", "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", m                  },
 475                 { NULL, NULL, NULL, NULL, NULL }
 476         };
 477
 478         DBusError error;
 479         DBusMessage *reply = NULL;
 480         int r;
 481
 482         assert(connection);
 483         assert(message);
 484         assert(m);
 485
 486         dbus_error_init(&error);
 487
 488         if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSession")) {
 489                 const char *name;
 490                 char *p;
 491                 Session *session;
 492                 bool b;
 493
 494                 if (!dbus_message_get_args(
 495                                     message,
 496                                     &error,
 497                                     DBUS_TYPE_STRING, &name,
 498                                     DBUS_TYPE_INVALID))
 499                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 500
 501                 session = hashmap_get(m->sessions, name);
 502                 if (!session)
 503                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 504
 505                 reply = dbus_message_new_method_return(message);
 506                 if (!reply)
 507                         goto oom;
 508
 509                 p = session_bus_path(session);
 510                 if (!p)
 511                         goto oom;
 512
 513                 b = dbus_message_append_args(
 514                                 reply,
 515                                 DBUS_TYPE_OBJECT_PATH, &p,
 516                                 DBUS_TYPE_INVALID);
 517                 free(p);
 518
 519                 if (!b)
 520                         goto oom;
 521
 522         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetUser")) {
 523                 uint32_t uid;
 524                 char *p;
 525                 User *user;
 526                 bool b;
 527
 528                 if (!dbus_message_get_args(
 529                                     message,
 530                                     &error,
 531                                     DBUS_TYPE_UINT32, &uid,
 532                                     DBUS_TYPE_INVALID))
 533                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 534
 535                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 536                 if (!user)
 537                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 538
 539                 reply = dbus_message_new_method_return(message);
 540                 if (!reply)
 541                         goto oom;
 542
 543                 p = user_bus_path(user);
 544                 if (!p)
 545                         goto oom;
 546
 547                 b = dbus_message_append_args(
 548                                 reply,
 549                                 DBUS_TYPE_OBJECT_PATH, &p,
 550                                 DBUS_TYPE_INVALID);
 551                 free(p);
 552
 553                 if (!b)
 554                         goto oom;
 555
 556         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSeat")) {
 557                 const char *name;
 558                 char *p;
 559                 Seat *seat;
 560                 bool b;
 561
 562                 if (!dbus_message_get_args(
 563                                     message,
 564                                     &error,
 565                                     DBUS_TYPE_STRING, &name,
 566                                     DBUS_TYPE_INVALID))
 567                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 568
 569                 seat = hashmap_get(m->seats, name);
 570                 if (!seat)
 571                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 572
 573                 reply = dbus_message_new_method_return(message);
 574                 if (!reply)
 575                         goto oom;
 576
 577                 p = seat_bus_path(seat);
 578                 if (!p)
 579                         goto oom;
 580
 581                 b = dbus_message_append_args(
 582                                 reply,
 583                                 DBUS_TYPE_OBJECT_PATH, &p,
 584                                 DBUS_TYPE_INVALID);
 585                 free(p);
 586
 587                 if (!b)
 588                         goto oom;
 589
 590         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSessions")) {
 591                 char *p;
 592                 Session *session;
 593                 Iterator i;
 594                 DBusMessageIter iter, sub;
 595                 const char *empty = "";
 596
 597                 reply = dbus_message_new_method_return(message);
 598                 if (!reply)
 599                         goto oom;
 600
 601                 dbus_message_iter_init_append(reply, &iter);
 602
 603                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(susso)", &sub))
 604                         goto oom;
 605
 606                 HASHMAP_FOREACH(session, m->sessions, i) {
 607                         DBusMessageIter sub2;
 608                         uint32_t uid;
 609
 610                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 611                                 goto oom;
 612
 613                         uid = session->user->uid;
 614
 615                         p = session_bus_path(session);
 616                         if (!p)
 617                                 goto oom;
 618
 619                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) ||
 620                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 621                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->user->name) ||
 622                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, session->seat ? (const char**) &session->seat->id : &empty) ||
 623                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 624                                 free(p);
 625                                 goto oom;
 626                         }
 627
 628                         free(p);
 629
 630                         if (!dbus_message_iter_close_container(&sub, &sub2))
 631                                 goto oom;
 632                 }
 633
 634                 if (!dbus_message_iter_close_container(&iter, &sub))
 635                         goto oom;
 636
 637         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListUsers")) {
 638                 char *p;
 639                 User *user;
 640                 Iterator i;
 641                 DBusMessageIter iter, sub;
 642
 643                 reply = dbus_message_new_method_return(message);
 644                 if (!reply)
 645                         goto oom;
 646
 647                 dbus_message_iter_init_append(reply, &iter);
 648
 649                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(uso)", &sub))
 650                         goto oom;
 651
 652                 HASHMAP_FOREACH(user, m->users, i) {
 653                         DBusMessageIter sub2;
 654                         uint32_t uid;
 655
 656                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 657                                 goto oom;
 658
 659                         uid = user->uid;
 660
 661                         p = user_bus_path(user);
 662                         if (!p)
 663                                 goto oom;
 664
 665                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 666                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &user->name) ||
 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", "ListSeats")) {
 682                 char *p;
 683                 Seat *seat;
 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, "(so)", &sub))
 694                         goto oom;
 695
 696                 HASHMAP_FOREACH(seat, m->seats, i) {
 697                         DBusMessageIter sub2;
 698
 699                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 700                                 goto oom;
 701
 702                         p = seat_bus_path(seat);
 703                         if (!p)
 704                                 goto oom;
 705
 706                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &seat->id) ||
 707                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 708                                 free(p);
 709                                 goto oom;
 710                         }
 711
 712                         free(p);
 713
 714                         if (!dbus_message_iter_close_container(&sub, &sub2))
 715                                 goto oom;
 716                 }
 717
 718                 if (!dbus_message_iter_close_container(&iter, &sub))
 719                         goto oom;
 720
 721         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
 722
 723                 r = bus_manager_create_session(m, message, &reply);
 724                 if (r == -ENOMEM)
 725                         goto oom;
 726
 727                 if (r < 0)
 728                         return bus_send_error_reply(connection, message, &error, r);
 729
 730         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
 731                 const char *name;
 732                 Session *session;
 733
 734                 if (!dbus_message_get_args(
 735                                     message,
 736                                     &error,
 737                                     DBUS_TYPE_STRING, &name,
 738                                     DBUS_TYPE_INVALID))
 739                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 740
 741                 session = hashmap_get(m->sessions, name);
 742                 if (!session)
 743                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 744
 745                 r = session_activate(session);
 746                 if (r < 0)
 747                         return bus_send_error_reply(connection, message, NULL, r);
 748
 749                 reply = dbus_message_new_method_return(message);
 750                 if (!reply)
 751                         goto oom;
 752
 753         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSession")) {
 754                 const char *name;
 755                 Session *session;
 756
 757                 if (!dbus_message_get_args(
 758                                     message,
 759                                     &error,
 760                                     DBUS_TYPE_STRING, &name,
 761                                     DBUS_TYPE_INVALID))
 762                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 763
 764                 session = hashmap_get(m->sessions, name);
 765                 if (!session)
 766                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 767
 768                 r = session_stop(session);
 769                 if (r < 0)
 770                         return bus_send_error_reply(connection, message, NULL, r);
 771
 772                 reply = dbus_message_new_method_return(message);
 773                 if (!reply)
 774                         goto oom;
 775
 776         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateUser")) {
 777                 uint32_t uid;
 778                 User *user;
 779
 780                 if (!dbus_message_get_args(
 781                                     message,
 782                                     &error,
 783                                     DBUS_TYPE_UINT32, &uid,
 784                                     DBUS_TYPE_INVALID))
 785                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 786
 787                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 788                 if (!user)
 789                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 790
 791                 r = user_stop(user);
 792                 if (r < 0)
 793                         return bus_send_error_reply(connection, message, NULL, r);
 794
 795                 reply = dbus_message_new_method_return(message);
 796                 if (!reply)
 797                         goto oom;
 798
 799         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSeat")) {
 800                 const char *name;
 801                 Seat *seat;
 802
 803                 if (!dbus_message_get_args(
 804                                     message,
 805                                     &error,
 806                                     DBUS_TYPE_STRING, &name,
 807                                     DBUS_TYPE_INVALID))
 808                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 809
 810                 seat = hashmap_get(m->seats, name);
 811                 if (!seat)
 812                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 813
 814                 r = seat_stop_sessions(seat);
 815                 if (r < 0)
 816                         return bus_send_error_reply(connection, message, NULL, r);
 817
 818                 reply = dbus_message_new_method_return(message);
 819                 if (!reply)
 820                         goto oom;
 821
 822         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 823                 char *introspection = NULL;
 824                 FILE *f;
 825                 Iterator i;
 826                 Session *session;
 827                 Seat *seat;
 828                 User *user;
 829                 size_t size;
 830                 char *p;
 831
 832                 if (!(reply = dbus_message_new_method_return(message)))
 833                         goto oom;
 834
 835                 /* We roll our own introspection code here, instead of
 836                  * relying on bus_default_message_handler() because we
 837                  * need to generate our introspection string
 838                  * dynamically. */
 839
 840                 if (!(f = open_memstream(&introspection, &size)))
 841                         goto oom;
 842
 843                 fputs(INTROSPECTION_BEGIN, f);
 844
 845                 HASHMAP_FOREACH(seat, m->seats, i) {
 846                         p = bus_path_escape(seat->id);
 847
 848                         if (p) {
 849                                 fprintf(f, "<node name=\"seat/%s\"/>", p);
 850                                 free(p);
 851                         }
 852                 }
 853
 854                 HASHMAP_FOREACH(user, m->users, i)
 855                         fprintf(f, "<node name=\"user/%llu\"/>", (unsigned long long) user->uid);
 856
 857                 HASHMAP_FOREACH(session, m->sessions, i) {
 858                         p = bus_path_escape(session->id);
 859
 860                         if (p) {
 861                                 fprintf(f, "<node name=\"session/%s\"/>", p);
 862                                 free(p);
 863                         }
 864                 }
 865
 866                 fputs(INTROSPECTION_END, f);
 867
 868                 if (ferror(f)) {
 869                         fclose(f);
 870                         free(introspection);
 871                         goto oom;
 872                 }
 873
 874                 fclose(f);
 875
 876                 if (!introspection)
 877                         goto oom;
 878
 879                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 880                         free(introspection);
 881                         goto oom;
 882                 }
 883
 884                 free(introspection);
 885         } else
 886                 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, properties);
 887
 888         if (reply) {
 889                 if (!dbus_connection_send(connection, reply, NULL))
 890                         goto oom;
 891
 892                 dbus_message_unref(reply);
 893         }
 894
 895         return DBUS_HANDLER_RESULT_HANDLED;
 896
 897 oom:
 898         if (reply)
 899                 dbus_message_unref(reply);
 900
 901         dbus_error_free(&error);
 902
 903         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 904 }
 905
 906 const DBusObjectPathVTable bus_manager_vtable = {
 907         .message_function = manager_message_handler
 908 };
 909
 910 DBusHandlerResult bus_message_filter(
 911                 DBusConnection *connection,
 912                 DBusMessage *message,
 913                 void *userdata) {
 914
 915         Manager *m = userdata;
 916         DBusError error;
 917
 918         assert(m);
 919         assert(connection);
 920         assert(message);
 921
 922         dbus_error_init(&error);
 923
 924         if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
 925                 const char *cgroup;
 926
 927                 if (!dbus_message_get_args(message, &error,
 928                                            DBUS_TYPE_STRING, &cgroup,
 929                                            DBUS_TYPE_INVALID))
 930                         log_error("Failed to parse Released message: %s", bus_error_message(&error));
 931                 else
 932                         manager_cgroup_notify_empty(m, cgroup);
 933         }
 934
 935         dbus_error_free(&error);
 936
 937         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 938 }
 939
 940 int manager_send_changed(Manager *manager, const char *properties) {
 941         DBusMessage *m;
 942         int r = -ENOMEM;
 943
 944         assert(manager);
 945
 946         m = bus_properties_changed_new("/org/freedesktop/login1", "org.freedesktop.login1.Manager", properties);
 947         if (!m)
 948                 goto finish;
 949
 950         if (!dbus_connection_send(manager->bus, m, NULL))
 951                 goto finish;
 952
 953         r = 0;
 954
 955 finish:
 956         if (m)
 957                 dbus_message_unref(m);
 958
 959         return r;
 960 }