src/logind-dbus.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2011 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <pwd.h>
  26
  27 #include "logind.h"
  28 #include "dbus-common.h"
  29 #include "strv.h"
  30 #include "polkit.h"
  31
  32 #define BUS_MANAGER_INTERFACE                                           \
  33         " <interface name=\"org.freedesktop.login1.Manager\">\n"        \
  34         "  <method name=\"GetSession\">\n"                              \
  35         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  36         "   <arg name=\"session\" type=\"o\" direction=\"out\"/>\n"     \
  37         "  </method>\n"                                                 \
  38         "  <method name=\"GetUser\">\n"                                 \
  39         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  40         "   <arg name=\"user\" type=\"o\" direction=\"out\"/>\n"        \
  41         "  </method>\n"                                                 \
  42         "  <method name=\"GetSeat\">\n"                                 \
  43         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  44         "   <arg name=\"seat\" type=\"o\" direction=\"out\"/>\n"        \
  45         "  </method>\n"                                                 \
  46         "  <method name=\"ListSessions\">\n"                            \
  47         "   <arg name=\"sessions\" type=\"a(susso)\" direction=\"out\"/>\n" \
  48         "  </method>\n"                                                 \
  49         "  <method name=\"ListUsers\">\n"                               \
  50         "   <arg name=\"users\" type=\"a(uso)\" direction=\"out\"/>\n"  \
  51         "  </method>\n"                                                 \
  52         "  <method name=\"ListSeats\">\n"                               \
  53         "   <arg name=\"seats\" type=\"a(so)\" direction=\"out\"/>\n"   \
  54         "  </method>\n"                                                 \
  55         "  <method name=\"CreateSession\">\n"                           \
  56         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  57         "   <arg name=\"leader\" type=\"u\" direction=\"in\"/>\n"       \
  58         "   <arg name=\"sevice\" type=\"s\" direction=\"in\"/>\n"       \
  59         "   <arg name=\"type\" type=\"s\" direction=\"in\"/>\n"         \
  60         "   <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n"         \
  61         "   <arg name=\"vtnr\" type=\"u\" direction=\"in\"/>\n"         \
  62         "   <arg name=\"tty\" type=\"s\" direction=\"in\"/>\n"          \
  63         "   <arg name=\"display\" type=\"s\" direction=\"in\"/>\n"      \
  64         "   <arg name=\"remote\" type=\"b\" direction=\"in\"/>\n"       \
  65         "   <arg name=\"remote_user\" type=\"s\" direction=\"in\"/>\n"  \
  66         "   <arg name=\"remote_host\" type=\"s\" direction=\"in\"/>\n"  \
  67         "   <arg name=\"controllers\" type=\"as\" direction=\"in\"/>\n" \
  68         "   <arg name=\"reset_controllers\" type=\"as\" direction=\"in\"/>\n" \
  69         "   <arg name=\"kill_processes\" type=\"b\" direction=\"in\"/>\n" \
  70         "   <arg name=\"id\" type=\"s\" direction=\"out\"/>\n"          \
  71         "   <arg name=\"path\" type=\"o\" direction=\"out\"/>\n"        \
  72         "   <arg name=\"runtime_path\" type=\"o\" direction=\"out\"/>\n" \
  73         "   <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n"          \
  74         "  </method>\n"                                                 \
  75         "  <method name=\"ActivateSession\">\n"                         \
  76         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  77         "  </method>\n"                                                 \
  78         "  <method name=\"TerminateSession\">\n"                        \
  79         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  80         "  </method>\n"                                                 \
  81         "  <method name=\"TerminateUser\">\n"                           \
  82         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  83         "  </method>\n"                                                 \
  84         "  <method name=\"TerminateSeat\">\n"                           \
  85         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  86         "  </method>\n"                                                 \
  87         "  <method name=\"SetUserLinger\">\n"                           \
  88         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  89         "   <arg name=\"b\" type=\"b\" direction=\"in\"/>\n"            \
  90         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
  91         "  </method>\n"                                                 \
  92         "  <signal name=\"SessionNew\">\n"                              \
  93         "   <arg name=\"id\" type=\"s\"/>\n"                            \
  94         "   <arg name=\"path\" type=\"o\"/>\n"                          \
  95         "  </signal>\n"                                                 \
  96         "  <signal name=\"SessionRemoved\">\n"                          \
  97         "   <arg name=\"id\" type=\"s\"/>\n"                            \
  98         "   <arg name=\"path\" type=\"o\"/>\n"                          \
  99         "  </signal>\n"                                                 \
 100         "  <signal name=\"UserNew\">\n"                                 \
 101         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
 102         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 103         "  </signal>\n"                                                 \
 104         "  <signal name=\"UserRemoved\">\n"                             \
 105         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
 106         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 107         "  </signal>\n"                                                 \
 108         "  <signal name=\"SeatNew\">\n"                                 \
 109         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 110         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 111         "  </signal>\n"                                                 \
 112         "  <signal name=\"SeatRemoved\">\n"                             \
 113         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 114         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 115         "  </signal>\n"                                                 \
 116         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 117         "  <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \
 118         "  <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \
 119         "  <property name=\"NAutoVTs\" type=\"u\" access=\"read\"/>\n" \
 120         "  <property name=\"KillOnlyUsers\" type=\"as\" access=\"read\"/>\n" \
 121         "  <property name=\"KillExcludeUsers\" type=\"as\" access=\"read\"/>\n" \
 122         "  <property name=\"KillUserProcesses\" type=\"b\" access=\"read\"/>\n" \
 123         "  <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n"  \
 124         "  <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
 125         "  <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
 126         " </interface>\n"
 127
 128 #define INTROSPECTION_BEGIN                                             \
 129         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 130         "<node>\n"                                                      \
 131         BUS_MANAGER_INTERFACE                                           \
 132         BUS_PROPERTIES_INTERFACE                                        \
 133         BUS_PEER_INTERFACE                                              \
 134         BUS_INTROSPECTABLE_INTERFACE
 135
 136 #define INTROSPECTION_END                                               \
 137         "</node>\n"
 138
 139 #define INTERFACES_LIST                              \
 140         BUS_GENERIC_INTERFACES_LIST                  \
 141         "org.freedesktop.login1.Manager\0"
 142
 143 static int bus_manager_append_idle_hint(DBusMessageIter *i, const char *property, void *data) {
 144         Manager *m = data;
 145         dbus_bool_t b;
 146
 147         assert(i);
 148         assert(property);
 149         assert(m);
 150
 151         b = manager_get_idle_hint(m, NULL) > 0;
 152         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
 153                 return -ENOMEM;
 154
 155         return 0;
 156 }
 157
 158 static int bus_manager_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) {
 159         Manager *m = data;
 160         dual_timestamp t;
 161         uint64_t u;
 162
 163         assert(i);
 164         assert(property);
 165         assert(m);
 166
 167         manager_get_idle_hint(m, &t);
 168         u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
 169
 170         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
 171                 return -ENOMEM;
 172
 173         return 0;
 174 }
 175
 176 static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMessage **_reply) {
 177         Session *session = NULL;
 178         User *user = NULL;
 179         const char *type, *seat, *tty, *display, *remote_user, *remote_host, *service;
 180         uint32_t uid, leader, audit_id = 0;
 181         dbus_bool_t remote, kill_processes;
 182         char **controllers = NULL, **reset_controllers = NULL;
 183         SessionType t;
 184         Seat *s;
 185         DBusMessageIter iter;
 186         int r;
 187         char *id = NULL, *p;
 188         uint32_t vtnr = 0;
 189         int pipe_fds[2] = { -1, -1 };
 190         DBusMessage *reply = NULL;
 191         bool b;
 192
 193         assert(m);
 194         assert(message);
 195         assert(_reply);
 196
 197         if (!dbus_message_iter_init(message, &iter) ||
 198             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 199                 return -EINVAL;
 200
 201         dbus_message_iter_get_basic(&iter, &uid);
 202
 203         if (!dbus_message_iter_next(&iter) ||
 204             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 205                 return -EINVAL;
 206
 207         dbus_message_iter_get_basic(&iter, &leader);
 208
 209         if (leader <= 0 ||
 210             !dbus_message_iter_next(&iter) ||
 211             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 212                 return -EINVAL;
 213
 214         dbus_message_iter_get_basic(&iter, &service);
 215
 216         if (!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, &type);
 221         t = session_type_from_string(type);
 222
 223         if (t < 0 ||
 224             !dbus_message_iter_next(&iter) ||
 225             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 226                 return -EINVAL;
 227
 228         dbus_message_iter_get_basic(&iter, &seat);
 229
 230         if (isempty(seat))
 231                 s = NULL;
 232         else {
 233                 s = hashmap_get(m->seats, seat);
 234                 if (!s)
 235                         return -ENOENT;
 236         }
 237
 238         if (!dbus_message_iter_next(&iter) ||
 239             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 240                 return -EINVAL;
 241
 242         dbus_message_iter_get_basic(&iter, &vtnr);
 243
 244         if (!dbus_message_iter_next(&iter) ||
 245             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 246                 return -EINVAL;
 247
 248         dbus_message_iter_get_basic(&iter, &tty);
 249
 250         if (tty_is_vc(tty)) {
 251                 int v;
 252
 253                 if (!s)
 254                         s = m->vtconsole;
 255                 else if (s != m->vtconsole)
 256                         return -EINVAL;
 257
 258                 v = vtnr_from_tty(tty);
 259
 260                 if (v <= 0)
 261                         return v < 0 ? v : -EINVAL;
 262
 263                 if (vtnr <= 0)
 264                         vtnr = (uint32_t) v;
 265                 else if (vtnr != (uint32_t) v)
 266                         return -EINVAL;
 267
 268         } else if (!isempty(tty) && s && seat_is_vtconsole(s))
 269                 return -EINVAL;
 270
 271         if (s) {
 272                 if (seat_is_vtconsole(s)) {
 273                         if (vtnr <= 0 || vtnr > 63)
 274                                 return -EINVAL;
 275                 } else {
 276                         if (vtnr > 0)
 277                                 return -EINVAL;
 278                 }
 279         }
 280
 281         if (!dbus_message_iter_next(&iter) ||
 282             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 283                 return -EINVAL;
 284
 285         dbus_message_iter_get_basic(&iter, &display);
 286
 287         if (!dbus_message_iter_next(&iter) ||
 288             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
 289                 return -EINVAL;
 290
 291         dbus_message_iter_get_basic(&iter, &remote);
 292
 293         if (!dbus_message_iter_next(&iter) ||
 294             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 295                 return -EINVAL;
 296
 297         dbus_message_iter_get_basic(&iter, &remote_user);
 298
 299         if (!dbus_message_iter_next(&iter) ||
 300             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 301                 return -EINVAL;
 302
 303         dbus_message_iter_get_basic(&iter, &remote_host);
 304
 305         if (!dbus_message_iter_next(&iter) ||
 306             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 307             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
 308                 return -EINVAL;
 309
 310         r = bus_parse_strv_iter(&iter, &controllers);
 311         if (r < 0)
 312                 return -EINVAL;
 313
 314         if (!dbus_message_iter_next(&iter) ||
 315             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 316             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING) {
 317                 r = -EINVAL;
 318                 goto fail;
 319         }
 320
 321         r = bus_parse_strv_iter(&iter, &reset_controllers);
 322         if (r < 0)
 323                 goto fail;
 324
 325         if (!dbus_message_iter_next(&iter) ||
 326             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) {
 327                 r = -EINVAL;
 328                 goto fail;
 329         }
 330
 331         dbus_message_iter_get_basic(&iter, &kill_processes);
 332
 333         r = manager_add_user_by_uid(m, uid, &user);
 334         if (r < 0)
 335                 goto fail;
 336
 337         audit_session_from_pid(leader, &audit_id);
 338
 339         if (audit_id > 0) {
 340                 asprintf(&id, "%lu", (unsigned long) audit_id);
 341
 342                 if (!id) {
 343                         r = -ENOMEM;
 344                         goto fail;
 345                 }
 346
 347                 session = hashmap_get(m->sessions, id);
 348
 349                 if (session) {
 350
 351                         /* Session already exists, client is probably
 352                          * something like "su" which changes uid but
 353                          * is still the same audit session */
 354
 355                         reply = dbus_message_new_method_return(message);
 356                         if (!reply) {
 357                                 r = -ENOMEM;
 358                                 goto fail;
 359                         }
 360
 361                         /* Create a throw-away fd */
 362                         if (pipe(pipe_fds) < 0) {
 363                                 r = -errno;
 364                                 goto fail;
 365                         }
 366
 367                         close_nointr_nofail(pipe_fds[0]);
 368                         pipe_fds[0] = -1;
 369
 370                         p = session_bus_path(session);
 371                         if (!p) {
 372                                 r = -ENOMEM;
 373                                 goto fail;
 374                         }
 375
 376                         b = dbus_message_append_args(
 377                                         reply,
 378                                         DBUS_TYPE_STRING, &session->id,
 379                                         DBUS_TYPE_OBJECT_PATH, &p,
 380                                         DBUS_TYPE_STRING, &session->user->runtime_path,
 381                                         DBUS_TYPE_UNIX_FD, &pipe_fds[1],
 382                                         DBUS_TYPE_INVALID);
 383                         free(p);
 384
 385                         if (!b) {
 386                                 r = -ENOMEM;
 387                                 goto fail;
 388                         }
 389
 390                         close_nointr_nofail(pipe_fds[1]);
 391                         *_reply = reply;
 392
 393                         return 0;
 394                 }
 395
 396         } else {
 397                 do {
 398                         free(id);
 399                         asprintf(&id, "c%lu", ++m->session_counter);
 400
 401                         if (!id) {
 402                                 r = -ENOMEM;
 403                                 goto fail;
 404                         }
 405
 406                 } while (hashmap_get(m->sessions, id));
 407         }
 408
 409         r = manager_add_session(m, user, id, &session);
 410         free(id);
 411         if (r < 0)
 412                 goto fail;
 413
 414         session->leader = leader;
 415         session->audit_id = audit_id;
 416         session->type = t;
 417         session->remote = remote;
 418         session->controllers = controllers;
 419         session->reset_controllers = reset_controllers;
 420         session->kill_processes = kill_processes;
 421         session->vtnr = vtnr;
 422
 423         controllers = reset_controllers = NULL;
 424
 425         if (!isempty(tty)) {
 426                 session->tty = strdup(tty);
 427                 if (!session->tty) {
 428                         r = -ENOMEM;
 429                         goto fail;
 430                 }
 431         }
 432
 433         if (!isempty(display)) {
 434                 session->display = strdup(display);
 435                 if (!session->display) {
 436                         r = -ENOMEM;
 437                         goto fail;
 438                 }
 439         }
 440
 441         if (!isempty(remote_user)) {
 442                 session->remote_user = strdup(remote_user);
 443                 if (!session->remote_user) {
 444                         r = -ENOMEM;
 445                         goto fail;
 446                 }
 447         }
 448
 449         if (!isempty(remote_host)) {
 450                 session->remote_host = strdup(remote_host);
 451                 if (!session->remote_host) {
 452                         r = -ENOMEM;
 453                         goto fail;
 454                 }
 455         }
 456
 457         if (!isempty(service)) {
 458                 session->service = strdup(service);
 459                 if (!session->service) {
 460                         r = -ENOMEM;
 461                         goto fail;
 462                 }
 463         }
 464
 465         if (pipe(pipe_fds) < 0) {
 466                 r = -errno;
 467                 goto fail;
 468         }
 469
 470         r = session_set_pipe_fd(session, pipe_fds[0]);
 471         if (r < 0)
 472                 goto fail;
 473         pipe_fds[0] = -1;
 474
 475         if (s) {
 476                 r = seat_attach_session(s, session);
 477                 if (r < 0)
 478                         goto fail;
 479         }
 480
 481         r = session_start(session);
 482         if (r < 0)
 483                 goto fail;
 484
 485         reply = dbus_message_new_method_return(message);
 486         if (!reply) {
 487                 r = -ENOMEM;
 488                 goto fail;
 489         }
 490
 491         p = session_bus_path(session);
 492         if (!p) {
 493                 r = -ENOMEM;
 494                 goto fail;
 495         }
 496
 497         b = dbus_message_append_args(
 498                         reply,
 499                         DBUS_TYPE_STRING, &session->id,
 500                         DBUS_TYPE_OBJECT_PATH, &p,
 501                         DBUS_TYPE_STRING, &session->user->runtime_path,
 502                         DBUS_TYPE_UNIX_FD, &pipe_fds[1],
 503                         DBUS_TYPE_INVALID);
 504         free(p);
 505
 506         if (!b) {
 507                 r = -ENOMEM;
 508                 goto fail;
 509         }
 510
 511         close_nointr_nofail(pipe_fds[1]);
 512         *_reply = reply;
 513
 514         return 0;
 515
 516 fail:
 517         strv_free(controllers);
 518         strv_free(reset_controllers);
 519
 520         if (session)
 521                 session_add_to_gc_queue(session);
 522
 523         if (user)
 524                 user_add_to_gc_queue(user);
 525
 526         close_pipe(pipe_fds);
 527
 528         if (reply)
 529                 dbus_message_unref(reply);
 530
 531         return r;
 532 }
 533
 534 static DBusHandlerResult manager_message_handler(
 535                 DBusConnection *connection,
 536                 DBusMessage *message,
 537                 void *userdata) {
 538
 539         Manager *m = userdata;
 540
 541         const BusProperty properties[] = {
 542                 { "org.freedesktop.login1.Manager", "ControlGroupHierarchy",  bus_property_append_string,   "s",  m->cgroup_path          },
 543                 { "org.freedesktop.login1.Manager", "Controllers",            bus_property_append_strv,     "as", m->controllers          },
 544                 { "org.freedesktop.login1.Manager", "NAutoVTs",               bus_property_append_unsigned, "u",  &m->n_autovts           },
 545                 { "org.freedesktop.login1.Manager", "KillOnlyUsers",          bus_property_append_strv,     "as", m->kill_only_users      },
 546                 { "org.freedesktop.login1.Manager", "KillExcludeUsers",       bus_property_append_strv,     "as", m->kill_exclude_users   },
 547                 { "org.freedesktop.login1.Manager", "KillUserProcesses",      bus_property_append_bool,     "b",  &m->kill_user_processes },
 548                 { "org.freedesktop.login1.Manager", "IdleHint",               bus_manager_append_idle_hint, "b",  m                       },
 549                 { "org.freedesktop.login1.Manager", "IdleSinceHint",          bus_manager_append_idle_hint_since, "t", m                  },
 550                 { "org.freedesktop.login1.Manager", "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", m                  },
 551                 { NULL, NULL, NULL, NULL, NULL }
 552         };
 553
 554         DBusError error;
 555         DBusMessage *reply = NULL;
 556         int r;
 557
 558         assert(connection);
 559         assert(message);
 560         assert(m);
 561
 562         dbus_error_init(&error);
 563
 564         if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSession")) {
 565                 const char *name;
 566                 char *p;
 567                 Session *session;
 568                 bool b;
 569
 570                 if (!dbus_message_get_args(
 571                                     message,
 572                                     &error,
 573                                     DBUS_TYPE_STRING, &name,
 574                                     DBUS_TYPE_INVALID))
 575                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 576
 577                 session = hashmap_get(m->sessions, name);
 578                 if (!session)
 579                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 580
 581                 reply = dbus_message_new_method_return(message);
 582                 if (!reply)
 583                         goto oom;
 584
 585                 p = session_bus_path(session);
 586                 if (!p)
 587                         goto oom;
 588
 589                 b = dbus_message_append_args(
 590                                 reply,
 591                                 DBUS_TYPE_OBJECT_PATH, &p,
 592                                 DBUS_TYPE_INVALID);
 593                 free(p);
 594
 595                 if (!b)
 596                         goto oom;
 597
 598         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetUser")) {
 599                 uint32_t uid;
 600                 char *p;
 601                 User *user;
 602                 bool b;
 603
 604                 if (!dbus_message_get_args(
 605                                     message,
 606                                     &error,
 607                                     DBUS_TYPE_UINT32, &uid,
 608                                     DBUS_TYPE_INVALID))
 609                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 610
 611                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 612                 if (!user)
 613                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 614
 615                 reply = dbus_message_new_method_return(message);
 616                 if (!reply)
 617                         goto oom;
 618
 619                 p = user_bus_path(user);
 620                 if (!p)
 621                         goto oom;
 622
 623                 b = dbus_message_append_args(
 624                                 reply,
 625                                 DBUS_TYPE_OBJECT_PATH, &p,
 626                                 DBUS_TYPE_INVALID);
 627                 free(p);
 628
 629                 if (!b)
 630                         goto oom;
 631
 632         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSeat")) {
 633                 const char *name;
 634                 char *p;
 635                 Seat *seat;
 636                 bool b;
 637
 638                 if (!dbus_message_get_args(
 639                                     message,
 640                                     &error,
 641                                     DBUS_TYPE_STRING, &name,
 642                                     DBUS_TYPE_INVALID))
 643                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 644
 645                 seat = hashmap_get(m->seats, name);
 646                 if (!seat)
 647                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 648
 649                 reply = dbus_message_new_method_return(message);
 650                 if (!reply)
 651                         goto oom;
 652
 653                 p = seat_bus_path(seat);
 654                 if (!p)
 655                         goto oom;
 656
 657                 b = dbus_message_append_args(
 658                                 reply,
 659                                 DBUS_TYPE_OBJECT_PATH, &p,
 660                                 DBUS_TYPE_INVALID);
 661                 free(p);
 662
 663                 if (!b)
 664                         goto oom;
 665
 666         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSessions")) {
 667                 char *p;
 668                 Session *session;
 669                 Iterator i;
 670                 DBusMessageIter iter, sub;
 671                 const char *empty = "";
 672
 673                 reply = dbus_message_new_method_return(message);
 674                 if (!reply)
 675                         goto oom;
 676
 677                 dbus_message_iter_init_append(reply, &iter);
 678
 679                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(susso)", &sub))
 680                         goto oom;
 681
 682                 HASHMAP_FOREACH(session, m->sessions, i) {
 683                         DBusMessageIter sub2;
 684                         uint32_t uid;
 685
 686                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 687                                 goto oom;
 688
 689                         uid = session->user->uid;
 690
 691                         p = session_bus_path(session);
 692                         if (!p)
 693                                 goto oom;
 694
 695                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) ||
 696                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 697                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->user->name) ||
 698                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, session->seat ? (const char**) &session->seat->id : &empty) ||
 699                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 700                                 free(p);
 701                                 goto oom;
 702                         }
 703
 704                         free(p);
 705
 706                         if (!dbus_message_iter_close_container(&sub, &sub2))
 707                                 goto oom;
 708                 }
 709
 710                 if (!dbus_message_iter_close_container(&iter, &sub))
 711                         goto oom;
 712
 713         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListUsers")) {
 714                 char *p;
 715                 User *user;
 716                 Iterator i;
 717                 DBusMessageIter iter, sub;
 718
 719                 reply = dbus_message_new_method_return(message);
 720                 if (!reply)
 721                         goto oom;
 722
 723                 dbus_message_iter_init_append(reply, &iter);
 724
 725                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(uso)", &sub))
 726                         goto oom;
 727
 728                 HASHMAP_FOREACH(user, m->users, i) {
 729                         DBusMessageIter sub2;
 730                         uint32_t uid;
 731
 732                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 733                                 goto oom;
 734
 735                         uid = user->uid;
 736
 737                         p = user_bus_path(user);
 738                         if (!p)
 739                                 goto oom;
 740
 741                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 742                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &user->name) ||
 743                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 744                                 free(p);
 745                                 goto oom;
 746                         }
 747
 748                         free(p);
 749
 750                         if (!dbus_message_iter_close_container(&sub, &sub2))
 751                                 goto oom;
 752                 }
 753
 754                 if (!dbus_message_iter_close_container(&iter, &sub))
 755                         goto oom;
 756
 757         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSeats")) {
 758                 char *p;
 759                 Seat *seat;
 760                 Iterator i;
 761                 DBusMessageIter iter, sub;
 762
 763                 reply = dbus_message_new_method_return(message);
 764                 if (!reply)
 765                         goto oom;
 766
 767                 dbus_message_iter_init_append(reply, &iter);
 768
 769                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(so)", &sub))
 770                         goto oom;
 771
 772                 HASHMAP_FOREACH(seat, m->seats, i) {
 773                         DBusMessageIter sub2;
 774
 775                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 776                                 goto oom;
 777
 778                         p = seat_bus_path(seat);
 779                         if (!p)
 780                                 goto oom;
 781
 782                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &seat->id) ||
 783                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 784                                 free(p);
 785                                 goto oom;
 786                         }
 787
 788                         free(p);
 789
 790                         if (!dbus_message_iter_close_container(&sub, &sub2))
 791                                 goto oom;
 792                 }
 793
 794                 if (!dbus_message_iter_close_container(&iter, &sub))
 795                         goto oom;
 796
 797         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
 798
 799                 r = bus_manager_create_session(m, message, &reply);
 800                 if (r == -ENOMEM)
 801                         goto oom;
 802
 803                 if (r < 0)
 804                         return bus_send_error_reply(connection, message, &error, r);
 805
 806         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
 807                 const char *name;
 808                 Session *session;
 809
 810                 if (!dbus_message_get_args(
 811                                     message,
 812                                     &error,
 813                                     DBUS_TYPE_STRING, &name,
 814                                     DBUS_TYPE_INVALID))
 815                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 816
 817                 session = hashmap_get(m->sessions, name);
 818                 if (!session)
 819                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 820
 821                 r = session_activate(session);
 822                 if (r < 0)
 823                         return bus_send_error_reply(connection, message, NULL, r);
 824
 825                 reply = dbus_message_new_method_return(message);
 826                 if (!reply)
 827                         goto oom;
 828
 829         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSession")) {
 830                 const char *name;
 831                 Session *session;
 832
 833                 if (!dbus_message_get_args(
 834                                     message,
 835                                     &error,
 836                                     DBUS_TYPE_STRING, &name,
 837                                     DBUS_TYPE_INVALID))
 838                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 839
 840                 session = hashmap_get(m->sessions, name);
 841                 if (!session)
 842                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 843
 844                 r = session_stop(session);
 845                 if (r < 0)
 846                         return bus_send_error_reply(connection, message, NULL, r);
 847
 848                 reply = dbus_message_new_method_return(message);
 849                 if (!reply)
 850                         goto oom;
 851
 852         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateUser")) {
 853                 uint32_t uid;
 854                 User *user;
 855
 856                 if (!dbus_message_get_args(
 857                                     message,
 858                                     &error,
 859                                     DBUS_TYPE_UINT32, &uid,
 860                                     DBUS_TYPE_INVALID))
 861                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 862
 863                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 864                 if (!user)
 865                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 866
 867                 r = user_stop(user);
 868                 if (r < 0)
 869                         return bus_send_error_reply(connection, message, NULL, r);
 870
 871                 reply = dbus_message_new_method_return(message);
 872                 if (!reply)
 873                         goto oom;
 874
 875         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSeat")) {
 876                 const char *name;
 877                 Seat *seat;
 878
 879                 if (!dbus_message_get_args(
 880                                     message,
 881                                     &error,
 882                                     DBUS_TYPE_STRING, &name,
 883                                     DBUS_TYPE_INVALID))
 884                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 885
 886                 seat = hashmap_get(m->seats, name);
 887                 if (!seat)
 888                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 889
 890                 r = seat_stop_sessions(seat);
 891                 if (r < 0)
 892                         return bus_send_error_reply(connection, message, NULL, r);
 893
 894                 reply = dbus_message_new_method_return(message);
 895                 if (!reply)
 896                         goto oom;
 897
 898         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "SetUserLinger")) {
 899                 uint32_t uid;
 900                 struct passwd *pw;
 901                 dbus_bool_t b, interactive;
 902                 char *path;
 903
 904                 if (!dbus_message_get_args(
 905                                     message,
 906                                     &error,
 907                                     DBUS_TYPE_UINT32, &uid,
 908                                     DBUS_TYPE_BOOLEAN, &b,
 909                                     DBUS_TYPE_BOOLEAN, &interactive,
 910                                     DBUS_TYPE_INVALID))
 911                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 912
 913                 errno = 0;
 914                 pw = getpwuid(uid);
 915                 if (!pw)
 916                         return bus_send_error_reply(connection, message, NULL, errno ? -errno : -EINVAL);
 917
 918                 r = verify_polkit(connection, message, "org.freedesktop.login1.set-user-linger", interactive, &error);
 919                 if (r < 0)
 920                         return bus_send_error_reply(connection, message, &error, r);
 921
 922                 r = safe_mkdir("/var/lib/systemd/linger", 0755, 0, 0);
 923                 if (r < 0)
 924                         return bus_send_error_reply(connection, message, &error, r);
 925
 926                 path = strappend("/var/lib/systemd/linger/", pw->pw_name);
 927                 if (!path)
 928                         goto oom;
 929
 930                 if (b) {
 931                         User *u;
 932
 933                         r = touch(path);
 934                         free(path);
 935
 936                         if (r < 0)
 937                                 return bus_send_error_reply(connection, message, &error, r);
 938
 939                         if (manager_add_user_by_uid(m, uid, &u) >= 0)
 940                                 user_start(u);
 941
 942                 } else {
 943                         User *u;
 944
 945                         r = unlink(path);
 946                         free(path);
 947
 948                         if (r < 0 && errno != ENOENT)
 949                                 return bus_send_error_reply(connection, message, &error, -errno);
 950
 951                         u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 952                         if (u)
 953                                 user_add_to_gc_queue(u);
 954                 }
 955
 956                 reply = dbus_message_new_method_return(message);
 957                 if (!reply)
 958                         goto oom;
 959
 960
 961         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 962                 char *introspection = NULL;
 963                 FILE *f;
 964                 Iterator i;
 965                 Session *session;
 966                 Seat *seat;
 967                 User *user;
 968                 size_t size;
 969                 char *p;
 970
 971                 if (!(reply = dbus_message_new_method_return(message)))
 972                         goto oom;
 973
 974                 /* We roll our own introspection code here, instead of
 975                  * relying on bus_default_message_handler() because we
 976                  * need to generate our introspection string
 977                  * dynamically. */
 978
 979                 if (!(f = open_memstream(&introspection, &size)))
 980                         goto oom;
 981
 982                 fputs(INTROSPECTION_BEGIN, f);
 983
 984                 HASHMAP_FOREACH(seat, m->seats, i) {
 985                         p = bus_path_escape(seat->id);
 986
 987                         if (p) {
 988                                 fprintf(f, "<node name=\"seat/%s\"/>", p);
 989                                 free(p);
 990                         }
 991                 }
 992
 993                 HASHMAP_FOREACH(user, m->users, i)
 994                         fprintf(f, "<node name=\"user/%llu\"/>", (unsigned long long) user->uid);
 995
 996                 HASHMAP_FOREACH(session, m->sessions, i) {
 997                         p = bus_path_escape(session->id);
 998
 999                         if (p) {
1000                                 fprintf(f, "<node name=\"session/%s\"/>", p);
1001                                 free(p);
1002                         }
1003                 }
1004
1005                 fputs(INTROSPECTION_END, f);
1006
1007                 if (ferror(f)) {
1008                         fclose(f);
1009                         free(introspection);
1010                         goto oom;
1011                 }
1012
1013                 fclose(f);
1014
1015                 if (!introspection)
1016                         goto oom;
1017
1018                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
1019                         free(introspection);
1020                         goto oom;
1021                 }
1022
1023                 free(introspection);
1024         } else
1025                 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, properties);
1026
1027         if (reply) {
1028                 if (!dbus_connection_send(connection, reply, NULL))
1029                         goto oom;
1030
1031                 dbus_message_unref(reply);
1032         }
1033
1034         return DBUS_HANDLER_RESULT_HANDLED;
1035
1036 oom:
1037         if (reply)
1038                 dbus_message_unref(reply);
1039
1040         dbus_error_free(&error);
1041
1042         return DBUS_HANDLER_RESULT_NEED_MEMORY;
1043 }
1044
1045 const DBusObjectPathVTable bus_manager_vtable = {
1046         .message_function = manager_message_handler
1047 };
1048
1049 DBusHandlerResult bus_message_filter(
1050                 DBusConnection *connection,
1051                 DBusMessage *message,
1052                 void *userdata) {
1053
1054         Manager *m = userdata;
1055         DBusError error;
1056
1057         assert(m);
1058         assert(connection);
1059         assert(message);
1060
1061         dbus_error_init(&error);
1062
1063         if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
1064                 const char *cgroup;
1065
1066                 if (!dbus_message_get_args(message, &error,
1067                                            DBUS_TYPE_STRING, &cgroup,
1068                                            DBUS_TYPE_INVALID))
1069                         log_error("Failed to parse Released message: %s", bus_error_message(&error));
1070                 else
1071                         manager_cgroup_notify_empty(m, cgroup);
1072         }
1073
1074         dbus_error_free(&error);
1075
1076         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1077 }
1078
1079 int manager_send_changed(Manager *manager, const char *properties) {
1080         DBusMessage *m;
1081         int r = -ENOMEM;
1082
1083         assert(manager);
1084
1085         m = bus_properties_changed_new("/org/freedesktop/login1", "org.freedesktop.login1.Manager", properties);
1086         if (!m)
1087                 goto finish;
1088
1089         if (!dbus_connection_send(manager->bus, m, NULL))
1090                 goto finish;
1091
1092         r = 0;
1093
1094 finish:
1095         if (m)
1096                 dbus_message_unref(m);
1097
1098         return r;
1099 }