src/login/logind-dbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <sys/stat.h>
   5 #include <unistd.h>
   6
   7 #include "sd-device.h"
   8 #include "sd-messages.h"
   9
  10 #include "alloc-util.h"
  11 #include "audit-util.h"
  12 #include "bootspec.h"
  13 #include "bus-common-errors.h"
  14 #include "bus-error.h"
  15 #include "bus-get-properties.h"
  16 #include "bus-locator.h"
  17 #include "bus-polkit.h"
  18 #include "bus-unit-util.h"
  19 #include "bus-util.h"
  20 #include "cgroup-util.h"
  21 #include "device-util.h"
  22 #include "dirent-util.h"
  23 #include "efi-loader.h"
  24 #include "efivars.h"
  25 #include "env-util.h"
  26 #include "escape.h"
  27 #include "fd-util.h"
  28 #include "fileio-label.h"
  29 #include "fileio.h"
  30 #include "format-util.h"
  31 #include "fs-util.h"
  32 #include "logind-action.h"
  33 #include "logind-dbus.h"
  34 #include "logind-polkit.h"
  35 #include "logind-seat-dbus.h"
  36 #include "logind-session-dbus.h"
  37 #include "logind-user-dbus.h"
  38 #include "logind.h"
  39 #include "missing_capability.h"
  40 #include "mkdir-label.h"
  41 #include "parse-util.h"
  42 #include "path-util.h"
  43 #include "process-util.h"
  44 #include "reboot-util.h"
  45 #include "selinux-util.h"
  46 #include "sleep-config.h"
  47 #include "special.h"
  48 #include "stdio-util.h"
  49 #include "strv.h"
  50 #include "terminal-util.h"
  51 #include "tmpfile-util.h"
  52 #include "unit-name.h"
  53 #include "user-util.h"
  54 #include "utmp-wtmp.h"
  55 #include "virt.h"
  56
  57 static void reset_scheduled_shutdown(Manager *m);
  58
  59 static int get_sender_session(
  60                 Manager *m,
  61                 sd_bus_message *message,
  62                 bool consult_display,
  63                 sd_bus_error *error,
  64                 Session **ret) {
  65
  66         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  67         Session *session = NULL;
  68         const char *name;
  69         int r;
  70
  71         /* Acquire the sender's session. This first checks if the sending process is inside a session itself,
  72          * and returns that. If not and 'consult_display' is true, this returns the display session of the
  73          * owning user of the caller. */
  74
  75         r = sd_bus_query_sender_creds(message,
  76                                       SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT|
  77                                       (consult_display ? SD_BUS_CREDS_OWNER_UID : 0), &creds);
  78         if (r < 0)
  79                 return r;
  80
  81         r = sd_bus_creds_get_session(creds, &name);
  82         if (r < 0) {
  83                 if (r != -ENXIO)
  84                         return r;
  85
  86                 if (consult_display) {
  87                         uid_t uid;
  88
  89                         r = sd_bus_creds_get_owner_uid(creds, &uid);
  90                         if (r < 0) {
  91                                 if (r != -ENXIO)
  92                                         return r;
  93                         } else {
  94                                 User *user;
  95
  96                                 user = hashmap_get(m->users, UID_TO_PTR(uid));
  97                                 if (user)
  98                                         session = user->display;
  99                         }
 100                 }
 101         } else
 102                 session = hashmap_get(m->sessions, name);
 103
 104         if (!session)
 105                 return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
 106                                          consult_display ?
 107                                          "Caller does not belong to any known session and doesn't own any suitable session." :
 108                                          "Caller does not belong to any known session.");
 109
 110         *ret = session;
 111         return 0;
 112 }
 113
 114 int manager_get_session_from_creds(
 115                 Manager *m,
 116                 sd_bus_message *message,
 117                 const char *name,
 118                 sd_bus_error *error,
 119                 Session **ret) {
 120
 121         Session *session;
 122
 123         assert(m);
 124         assert(ret);
 125
 126         if (SEAT_IS_SELF(name)) /* the caller's own session */
 127                 return get_sender_session(m, message, false, error, ret);
 128         if (SEAT_IS_AUTO(name)) /* The caller's own session if they have one, otherwise their user's display session */
 129                 return get_sender_session(m, message, true, error, ret);
 130
 131         session = hashmap_get(m->sessions, name);
 132         if (!session)
 133                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
 134
 135         *ret = session;
 136         return 0;
 137 }
 138
 139 static int get_sender_user(Manager *m, sd_bus_message *message, sd_bus_error *error, User **ret) {
 140         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 141         uid_t uid;
 142         User *user;
 143         int r;
 144
 145         /* Note that we get the owner UID of the session, not the actual client UID here! */
 146         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 147         if (r < 0)
 148                 return r;
 149
 150         r = sd_bus_creds_get_owner_uid(creds, &uid);
 151         if (r < 0) {
 152                 if (r != -ENXIO)
 153                         return r;
 154
 155                 user = NULL;
 156         } else
 157                 user = hashmap_get(m->users, UID_TO_PTR(uid));
 158
 159         if (!user)
 160                 return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 161                                          "Caller does not belong to any logged in or lingering user");
 162
 163         *ret = user;
 164         return 0;
 165 }
 166
 167 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
 168         User *user;
 169
 170         assert(m);
 171         assert(ret);
 172
 173         if (!uid_is_valid(uid))
 174                 return get_sender_user(m, message, error, ret);
 175
 176         user = hashmap_get(m->users, UID_TO_PTR(uid));
 177         if (!user)
 178                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER,
 179                                          "User ID "UID_FMT" is not logged in or lingering", uid);
 180
 181         *ret = user;
 182         return 0;
 183 }
 184
 185 int manager_get_seat_from_creds(
 186                 Manager *m,
 187                 sd_bus_message *message,
 188                 const char *name,
 189                 sd_bus_error *error,
 190                 Seat **ret) {
 191
 192         Seat *seat;
 193         int r;
 194
 195         assert(m);
 196         assert(ret);
 197
 198         if (SEAT_IS_SELF(name) || SEAT_IS_AUTO(name)) {
 199                 Session *session;
 200
 201                 /* Use these special seat names as session names */
 202                 r = manager_get_session_from_creds(m, message, name, error, &session);
 203                 if (r < 0)
 204                         return r;
 205
 206                 seat = session->seat;
 207                 if (!seat)
 208                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session '%s' has no seat.", session->id);
 209         } else {
 210                 seat = hashmap_get(m->seats, name);
 211                 if (!seat)
 212                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 213         }
 214
 215         *ret = seat;
 216         return 0;
 217 }
 218
 219 static int return_test_polkit(
 220                 sd_bus_message *message,
 221                 int capability,
 222                 const char *action,
 223                 const char **details,
 224                 uid_t good_user,
 225                 sd_bus_error *e) {
 226
 227         const char *result;
 228         bool challenge;
 229         int r;
 230
 231         r = bus_test_polkit(message, capability, action, details, good_user, &challenge, e);
 232         if (r < 0)
 233                 return r;
 234
 235         if (r > 0)
 236                 result = "yes";
 237         else if (challenge)
 238                 result = "challenge";
 239         else
 240                 result = "no";
 241
 242         return sd_bus_reply_method_return(message, "s", result);
 243 }
 244
 245 static int property_get_idle_hint(
 246                 sd_bus *bus,
 247                 const char *path,
 248                 const char *interface,
 249                 const char *property,
 250                 sd_bus_message *reply,
 251                 void *userdata,
 252                 sd_bus_error *error) {
 253
 254         Manager *m = userdata;
 255
 256         assert(bus);
 257         assert(reply);
 258         assert(m);
 259
 260         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 261 }
 262
 263 static int property_get_idle_since_hint(
 264                 sd_bus *bus,
 265                 const char *path,
 266                 const char *interface,
 267                 const char *property,
 268                 sd_bus_message *reply,
 269                 void *userdata,
 270                 sd_bus_error *error) {
 271
 272         Manager *m = userdata;
 273         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 274
 275         assert(bus);
 276         assert(reply);
 277         assert(m);
 278
 279         manager_get_idle_hint(m, &t);
 280
 281         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 282 }
 283
 284 static int property_get_inhibited(
 285                 sd_bus *bus,
 286                 const char *path,
 287                 const char *interface,
 288                 const char *property,
 289                 sd_bus_message *reply,
 290                 void *userdata,
 291                 sd_bus_error *error) {
 292
 293         Manager *m = userdata;
 294         InhibitWhat w;
 295
 296         assert(bus);
 297         assert(reply);
 298         assert(m);
 299
 300         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 301
 302         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 303 }
 304
 305 static int property_get_preparing(
 306                 sd_bus *bus,
 307                 const char *path,
 308                 const char *interface,
 309                 const char *property,
 310                 sd_bus_message *reply,
 311                 void *userdata,
 312                 sd_bus_error *error) {
 313
 314         Manager *m = userdata;
 315         bool b = false;
 316
 317         assert(bus);
 318         assert(reply);
 319         assert(m);
 320
 321         if (m->delayed_action) {
 322                 if (streq(property, "PreparingForShutdown"))
 323                         b = m->delayed_action->inhibit_what & INHIBIT_SHUTDOWN;
 324                 else
 325                         b = m->delayed_action->inhibit_what & INHIBIT_SLEEP;
 326         }
 327
 328         return sd_bus_message_append(reply, "b", b);
 329 }
 330
 331 static int property_get_scheduled_shutdown(
 332                 sd_bus *bus,
 333                 const char *path,
 334                 const char *interface,
 335                 const char *property,
 336                 sd_bus_message *reply,
 337                 void *userdata,
 338                 sd_bus_error *error) {
 339
 340         Manager *m = userdata;
 341         int r;
 342
 343         assert(bus);
 344         assert(reply);
 345         assert(m);
 346
 347         r = sd_bus_message_open_container(reply, 'r', "st");
 348         if (r < 0)
 349                 return r;
 350
 351         r = sd_bus_message_append(reply, "st",
 352                 handle_action_to_string(manager_handle_for_item(m->scheduled_shutdown_type)),
 353                 m->scheduled_shutdown_timeout);
 354         if (r < 0)
 355                 return r;
 356
 357         return sd_bus_message_close_container(reply);
 358 }
 359
 360 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 361 static BUS_DEFINE_PROPERTY_GET(property_get_docked, "b", Manager, manager_is_docked_or_external_displays);
 362 static BUS_DEFINE_PROPERTY_GET(property_get_lid_closed, "b", Manager, manager_is_lid_closed);
 363 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_on_external_power, "b", manager_is_on_external_power);
 364 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_compat_user_tasks_max, "t", CGROUP_LIMIT_MAX);
 365 static BUS_DEFINE_PROPERTY_GET_REF(property_get_hashmap_size, "t", Hashmap *, (uint64_t) hashmap_size);
 366
 367 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 368         _cleanup_free_ char *p = NULL;
 369         Manager *m = userdata;
 370         const char *name;
 371         Session *session;
 372         int r;
 373
 374         assert(message);
 375         assert(m);
 376
 377         r = sd_bus_message_read(message, "s", &name);
 378         if (r < 0)
 379                 return r;
 380
 381         r = manager_get_session_from_creds(m, message, name, error, &session);
 382         if (r < 0)
 383                 return r;
 384
 385         p = session_bus_path(session);
 386         if (!p)
 387                 return -ENOMEM;
 388
 389         return sd_bus_reply_method_return(message, "o", p);
 390 }
 391
 392 /* Get login session of a process.  This is not what you are looking for these days,
 393  * as apps may instead belong to a user service unit.  This includes terminal
 394  * emulators and hence command-line apps. */
 395 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 396         _cleanup_free_ char *p = NULL;
 397         Session *session = NULL;
 398         Manager *m = userdata;
 399         pid_t pid;
 400         int r;
 401
 402         assert(message);
 403         assert(m);
 404
 405         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 406
 407         r = sd_bus_message_read(message, "u", &pid);
 408         if (r < 0)
 409                 return r;
 410         if (pid < 0)
 411                 return -EINVAL;
 412
 413         if (pid == 0) {
 414                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 415                 if (r < 0)
 416                         return r;
 417         } else {
 418                 r = manager_get_session_by_pid(m, pid, &session);
 419                 if (r < 0)
 420                         return r;
 421
 422                 if (!session)
 423                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
 424                                                  "PID "PID_FMT" does not belong to any known session", pid);
 425         }
 426
 427         p = session_bus_path(session);
 428         if (!p)
 429                 return -ENOMEM;
 430
 431         return sd_bus_reply_method_return(message, "o", p);
 432 }
 433
 434 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 435         _cleanup_free_ char *p = NULL;
 436         Manager *m = userdata;
 437         uint32_t uid;
 438         User *user;
 439         int r;
 440
 441         assert(message);
 442         assert(m);
 443
 444         r = sd_bus_message_read(message, "u", &uid);
 445         if (r < 0)
 446                 return r;
 447
 448         r = manager_get_user_from_creds(m, message, uid, error, &user);
 449         if (r < 0)
 450                 return r;
 451
 452         p = user_bus_path(user);
 453         if (!p)
 454                 return -ENOMEM;
 455
 456         return sd_bus_reply_method_return(message, "o", p);
 457 }
 458
 459 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 460         _cleanup_free_ char *p = NULL;
 461         Manager *m = userdata;
 462         User *user = NULL;
 463         pid_t pid;
 464         int r;
 465
 466         assert(message);
 467         assert(m);
 468
 469         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 470
 471         r = sd_bus_message_read(message, "u", &pid);
 472         if (r < 0)
 473                 return r;
 474         if (pid < 0)
 475                 return -EINVAL;
 476
 477         if (pid == 0) {
 478                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 479                 if (r < 0)
 480                         return r;
 481         } else {
 482                 r = manager_get_user_by_pid(m, pid, &user);
 483                 if (r < 0)
 484                         return r;
 485                 if (!user)
 486                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 487                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 488                                                  pid);
 489         }
 490
 491         p = user_bus_path(user);
 492         if (!p)
 493                 return -ENOMEM;
 494
 495         return sd_bus_reply_method_return(message, "o", p);
 496 }
 497
 498 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 499         _cleanup_free_ char *p = NULL;
 500         Manager *m = userdata;
 501         const char *name;
 502         Seat *seat;
 503         int r;
 504
 505         assert(message);
 506         assert(m);
 507
 508         r = sd_bus_message_read(message, "s", &name);
 509         if (r < 0)
 510                 return r;
 511
 512         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 513         if (r < 0)
 514                 return r;
 515
 516         p = seat_bus_path(seat);
 517         if (!p)
 518                 return -ENOMEM;
 519
 520         return sd_bus_reply_method_return(message, "o", p);
 521 }
 522
 523 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 524         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 525         Manager *m = userdata;
 526         Session *session;
 527         int r;
 528
 529         assert(message);
 530         assert(m);
 531
 532         r = sd_bus_message_new_method_return(message, &reply);
 533         if (r < 0)
 534                 return r;
 535
 536         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 537         if (r < 0)
 538                 return r;
 539
 540         HASHMAP_FOREACH(session, m->sessions) {
 541                 _cleanup_free_ char *p = NULL;
 542
 543                 p = session_bus_path(session);
 544                 if (!p)
 545                         return -ENOMEM;
 546
 547                 r = sd_bus_message_append(reply, "(susso)",
 548                                           session->id,
 549                                           (uint32_t) session->user->user_record->uid,
 550                                           session->user->user_record->user_name,
 551                                           session->seat ? session->seat->id : "",
 552                                           p);
 553                 if (r < 0)
 554                         return r;
 555         }
 556
 557         r = sd_bus_message_close_container(reply);
 558         if (r < 0)
 559                 return r;
 560
 561         return sd_bus_send(NULL, reply, NULL);
 562 }
 563
 564 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 565         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 566         Manager *m = userdata;
 567         User *user;
 568         int r;
 569
 570         assert(message);
 571         assert(m);
 572
 573         r = sd_bus_message_new_method_return(message, &reply);
 574         if (r < 0)
 575                 return r;
 576
 577         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 578         if (r < 0)
 579                 return r;
 580
 581         HASHMAP_FOREACH(user, m->users) {
 582                 _cleanup_free_ char *p = NULL;
 583
 584                 p = user_bus_path(user);
 585                 if (!p)
 586                         return -ENOMEM;
 587
 588                 r = sd_bus_message_append(reply, "(uso)",
 589                                           (uint32_t) user->user_record->uid,
 590                                           user->user_record->user_name,
 591                                           p);
 592                 if (r < 0)
 593                         return r;
 594         }
 595
 596         r = sd_bus_message_close_container(reply);
 597         if (r < 0)
 598                 return r;
 599
 600         return sd_bus_send(NULL, reply, NULL);
 601 }
 602
 603 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 604         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 605         Manager *m = userdata;
 606         Seat *seat;
 607         int r;
 608
 609         assert(message);
 610         assert(m);
 611
 612         r = sd_bus_message_new_method_return(message, &reply);
 613         if (r < 0)
 614                 return r;
 615
 616         r = sd_bus_message_open_container(reply, 'a', "(so)");
 617         if (r < 0)
 618                 return r;
 619
 620         HASHMAP_FOREACH(seat, m->seats) {
 621                 _cleanup_free_ char *p = NULL;
 622
 623                 p = seat_bus_path(seat);
 624                 if (!p)
 625                         return -ENOMEM;
 626
 627                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 628                 if (r < 0)
 629                         return r;
 630         }
 631
 632         r = sd_bus_message_close_container(reply);
 633         if (r < 0)
 634                 return r;
 635
 636         return sd_bus_send(NULL, reply, NULL);
 637 }
 638
 639 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 640         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 641         Manager *m = userdata;
 642         Inhibitor *inhibitor;
 643         int r;
 644
 645         assert(message);
 646         assert(m);
 647
 648         r = sd_bus_message_new_method_return(message, &reply);
 649         if (r < 0)
 650                 return r;
 651
 652         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 653         if (r < 0)
 654                 return r;
 655
 656         HASHMAP_FOREACH(inhibitor, m->inhibitors) {
 657
 658                 r = sd_bus_message_append(reply, "(ssssuu)",
 659                                           strempty(inhibit_what_to_string(inhibitor->what)),
 660                                           strempty(inhibitor->who),
 661                                           strempty(inhibitor->why),
 662                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 663                                           (uint32_t) inhibitor->uid,
 664                                           (uint32_t) inhibitor->pid);
 665                 if (r < 0)
 666                         return r;
 667         }
 668
 669         r = sd_bus_message_close_container(reply);
 670         if (r < 0)
 671                 return r;
 672
 673         return sd_bus_send(NULL, reply, NULL);
 674 }
 675
 676 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 677         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 678         _cleanup_free_ char *id = NULL;
 679         Session *session = NULL;
 680         uint32_t audit_id = 0;
 681         Manager *m = userdata;
 682         User *user = NULL;
 683         Seat *seat = NULL;
 684         pid_t leader;
 685         uid_t uid;
 686         int remote;
 687         uint32_t vtnr = 0;
 688         SessionType t;
 689         SessionClass c;
 690         int r;
 691
 692         assert(message);
 693         assert(m);
 694
 695         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 696         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 697
 698         r = sd_bus_message_read(message, "uusssssussbss",
 699                                 &uid, &leader, &service, &type, &class, &desktop, &cseat,
 700                                 &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 701         if (r < 0)
 702                 return r;
 703
 704         if (!uid_is_valid(uid))
 705                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 706         if (leader < 0 || leader == 1 || leader == getpid_cached())
 707                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 708
 709         if (isempty(type))
 710                 t = _SESSION_TYPE_INVALID;
 711         else {
 712                 t = session_type_from_string(type);
 713                 if (t < 0)
 714                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 715                                                  "Invalid session type %s", type);
 716         }
 717
 718         if (isempty(class))
 719                 c = _SESSION_CLASS_INVALID;
 720         else {
 721                 c = session_class_from_string(class);
 722                 if (c < 0)
 723                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 724                                                  "Invalid session class %s", class);
 725         }
 726
 727         if (isempty(desktop))
 728                 desktop = NULL;
 729         else {
 730                 if (!string_is_safe(desktop))
 731                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 732                                                  "Invalid desktop string %s", desktop);
 733         }
 734
 735         if (isempty(cseat))
 736                 seat = NULL;
 737         else {
 738                 seat = hashmap_get(m->seats, cseat);
 739                 if (!seat)
 740                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT,
 741                                                  "No seat '%s' known", cseat);
 742         }
 743
 744         if (tty_is_vc(tty)) {
 745                 int v;
 746
 747                 if (!seat)
 748                         seat = m->seat0;
 749                 else if (seat != m->seat0)
 750                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 751                                                  "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 752
 753                 v = vtnr_from_tty(tty);
 754                 if (v <= 0)
 755                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 756                                                  "Cannot determine VT number from virtual console TTY %s", tty);
 757
 758                 if (vtnr == 0)
 759                         vtnr = (uint32_t) v;
 760                 else if (vtnr != (uint32_t) v)
 761                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 762                                                  "Specified TTY and VT number do not match");
 763
 764         } else if (tty_is_console(tty)) {
 765
 766                 if (!seat)
 767                         seat = m->seat0;
 768                 else if (seat != m->seat0)
 769                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 770                                                  "Console TTY specified but seat is not seat0");
 771
 772                 if (vtnr != 0)
 773                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 774                                                  "Console TTY specified but VT number is not 0");
 775         }
 776
 777         if (seat) {
 778                 if (seat_has_vts(seat)) {
 779                         if (vtnr <= 0 || vtnr > 63)
 780                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 781                                                          "VT number out of range");
 782                 } else {
 783                         if (vtnr != 0)
 784                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 785                                                          "Seat has no VTs but VT number not 0");
 786                 }
 787         }
 788
 789         if (t == _SESSION_TYPE_INVALID) {
 790                 if (!isempty(display))
 791                         t = SESSION_X11;
 792                 else if (!isempty(tty))
 793                         t = SESSION_TTY;
 794                 else
 795                         t = SESSION_UNSPECIFIED;
 796         }
 797
 798         if (c == _SESSION_CLASS_INVALID) {
 799                 if (t == SESSION_UNSPECIFIED)
 800                         c = SESSION_BACKGROUND;
 801                 else
 802                         c = SESSION_USER;
 803         }
 804
 805         if (leader == 0) {
 806                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 807
 808                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 809                 if (r < 0)
 810                         return r;
 811
 812                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 813                 if (r < 0)
 814                         return r;
 815         }
 816
 817         /* Check if we are already in a logind session. Or if we are in user@.service
 818          * which is a special PAM session that avoids creating a logind session. */
 819         r = manager_get_user_by_pid(m, leader, NULL);
 820         if (r < 0)
 821                 return r;
 822         if (r > 0)
 823                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY,
 824                                          "Already running in a session or user slice");
 825
 826         /*
 827          * Old gdm and lightdm start the user-session on the same VT as
 828          * the greeter session. But they destroy the greeter session
 829          * after the user-session and want the user-session to take
 830          * over the VT. We need to support this for
 831          * backwards-compatibility, so make sure we allow new sessions
 832          * on a VT that a greeter is running on. Furthermore, to allow
 833          * re-logins, we have to allow a greeter to take over a used VT for
 834          * the exact same reasons.
 835          */
 836         if (c != SESSION_GREETER &&
 837             vtnr > 0 &&
 838             vtnr < MALLOC_ELEMENTSOF(m->seat0->positions) &&
 839             m->seat0->positions[vtnr] &&
 840             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 841                 return sd_bus_error_set(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 842
 843         if (hashmap_size(m->sessions) >= m->sessions_max)
 844                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
 845                                          "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.",
 846                                          m->sessions_max);
 847
 848         (void) audit_session_from_pid(leader, &audit_id);
 849         if (audit_session_is_valid(audit_id)) {
 850                 /* Keep our session IDs and the audit session IDs in sync */
 851
 852                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 853                         return -ENOMEM;
 854
 855                 /* Wut? There's already a session by this name and we didn't find it above? Weird, then let's
 856                  * not trust the audit data and let's better register a new ID */
 857                 if (hashmap_contains(m->sessions, id)) {
 858                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 859                         audit_id = AUDIT_SESSION_INVALID;
 860                         id = mfree(id);
 861                 }
 862         }
 863
 864         if (!id) {
 865                 do {
 866                         id = mfree(id);
 867
 868                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 869                                 return -ENOMEM;
 870
 871                 } while (hashmap_contains(m->sessions, id));
 872         }
 873
 874         /* The generated names should not clash with 'auto' or 'self' */
 875         assert(!SESSION_IS_SELF(id));
 876         assert(!SESSION_IS_AUTO(id));
 877
 878         /* If we are not watching utmp already, try again */
 879         manager_reconnect_utmp(m);
 880
 881         r = manager_add_user_by_uid(m, uid, &user);
 882         if (r < 0)
 883                 goto fail;
 884
 885         r = manager_add_session(m, id, &session);
 886         if (r < 0)
 887                 goto fail;
 888
 889         session_set_user(session, user);
 890         r = session_set_leader(session, leader);
 891         if (r < 0)
 892                 goto fail;
 893
 894         session->original_type = session->type = t;
 895         session->class = c;
 896         session->remote = remote;
 897         session->vtnr = vtnr;
 898
 899         if (!isempty(tty)) {
 900                 session->tty = strdup(tty);
 901                 if (!session->tty) {
 902                         r = -ENOMEM;
 903                         goto fail;
 904                 }
 905
 906                 session->tty_validity = TTY_FROM_PAM;
 907         }
 908
 909         if (!isempty(display)) {
 910                 session->display = strdup(display);
 911                 if (!session->display) {
 912                         r = -ENOMEM;
 913                         goto fail;
 914                 }
 915         }
 916
 917         if (!isempty(remote_user)) {
 918                 session->remote_user = strdup(remote_user);
 919                 if (!session->remote_user) {
 920                         r = -ENOMEM;
 921                         goto fail;
 922                 }
 923         }
 924
 925         if (!isempty(remote_host)) {
 926                 session->remote_host = strdup(remote_host);
 927                 if (!session->remote_host) {
 928                         r = -ENOMEM;
 929                         goto fail;
 930                 }
 931         }
 932
 933         if (!isempty(service)) {
 934                 session->service = strdup(service);
 935                 if (!session->service) {
 936                         r = -ENOMEM;
 937                         goto fail;
 938                 }
 939         }
 940
 941         if (!isempty(desktop)) {
 942                 session->desktop = strdup(desktop);
 943                 if (!session->desktop) {
 944                         r = -ENOMEM;
 945                         goto fail;
 946                 }
 947         }
 948
 949         if (seat) {
 950                 r = seat_attach_session(seat, session);
 951                 if (r < 0)
 952                         goto fail;
 953         }
 954
 955         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 956         if (r < 0)
 957                 goto fail;
 958
 959         r = session_start(session, message, error);
 960         if (r < 0)
 961                 goto fail;
 962
 963         r = sd_bus_message_exit_container(message);
 964         if (r < 0)
 965                 goto fail;
 966
 967         session->create_message = sd_bus_message_ref(message);
 968
 969         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 970          * session_send_create_reply(). */
 971
 972         return 1;
 973
 974 fail:
 975         if (session)
 976                 session_add_to_gc_queue(session);
 977
 978         if (user)
 979                 user_add_to_gc_queue(user);
 980
 981         return r;
 982 }
 983
 984 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 985         Manager *m = userdata;
 986         Session *session;
 987         const char *name;
 988         int r;
 989
 990         assert(message);
 991         assert(m);
 992
 993         r = sd_bus_message_read(message, "s", &name);
 994         if (r < 0)
 995                 return r;
 996
 997         r = manager_get_session_from_creds(m, message, name, error, &session);
 998         if (r < 0)
 999                 return r;
1000
1001         r = session_release(session);
1002         if (r < 0)
1003                 return r;
1004
1005         return sd_bus_reply_method_return(message, NULL);
1006 }
1007
1008 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1009         Manager *m = userdata;
1010         Session *session;
1011         const char *name;
1012         int r;
1013
1014         assert(message);
1015         assert(m);
1016
1017         r = sd_bus_message_read(message, "s", &name);
1018         if (r < 0)
1019                 return r;
1020
1021         r = manager_get_session_from_creds(m, message, name, error, &session);
1022         if (r < 0)
1023                 return r;
1024
1025         /* PolicyKit is done by bus_session_method_activate() */
1026
1027         return bus_session_method_activate(message, session, error);
1028 }
1029
1030 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1031         const char *session_name, *seat_name;
1032         Manager *m = userdata;
1033         Session *session;
1034         Seat *seat;
1035         int r;
1036
1037         assert(message);
1038         assert(m);
1039
1040         /* Same as ActivateSession() but refuses to work if the seat doesn't match */
1041
1042         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
1043         if (r < 0)
1044                 return r;
1045
1046         r = manager_get_session_from_creds(m, message, session_name, error, &session);
1047         if (r < 0)
1048                 return r;
1049
1050         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
1051         if (r < 0)
1052                 return r;
1053
1054         if (session->seat != seat)
1055                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT,
1056                                          "Session %s not on seat %s", session_name, seat_name);
1057
1058         r = check_polkit_chvt(message, m, error);
1059         if (r < 0)
1060                 return r;
1061         if (r == 0)
1062                 return 1; /* Will call us back */
1063
1064         r = session_activate(session);
1065         if (r < 0)
1066                 return r;
1067
1068         return sd_bus_reply_method_return(message, NULL);
1069 }
1070
1071 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1072         Manager *m = userdata;
1073         Session *session;
1074         const char *name;
1075         int r;
1076
1077         assert(message);
1078         assert(m);
1079
1080         r = sd_bus_message_read(message, "s", &name);
1081         if (r < 0)
1082                 return r;
1083
1084         r = manager_get_session_from_creds(m, message, name, error, &session);
1085         if (r < 0)
1086                 return r;
1087
1088         return bus_session_method_lock(message, session, error);
1089 }
1090
1091 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1092         Manager *m = userdata;
1093         int r;
1094
1095         assert(message);
1096         assert(m);
1097
1098         r = bus_verify_polkit_async(
1099                         message,
1100                         CAP_SYS_ADMIN,
1101                         "org.freedesktop.login1.lock-sessions",
1102                         NULL,
1103                         false,
1104                         UID_INVALID,
1105                         &m->polkit_registry,
1106                         error);
1107         if (r < 0)
1108                 return r;
1109         if (r == 0)
1110                 return 1; /* Will call us back */
1111
1112         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1113         if (r < 0)
1114                 return r;
1115
1116         return sd_bus_reply_method_return(message, NULL);
1117 }
1118
1119 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1120         const char *name;
1121         Manager *m = userdata;
1122         Session *session;
1123         int r;
1124
1125         assert(message);
1126         assert(m);
1127
1128         r = sd_bus_message_read(message, "s", &name);
1129         if (r < 0)
1130                 return r;
1131
1132         r = manager_get_session_from_creds(m, message, name, error, &session);
1133         if (r < 0)
1134                 return r;
1135
1136         return bus_session_method_kill(message, session, error);
1137 }
1138
1139 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1140         Manager *m = userdata;
1141         uint32_t uid;
1142         User *user;
1143         int r;
1144
1145         assert(message);
1146         assert(m);
1147
1148         r = sd_bus_message_read(message, "u", &uid);
1149         if (r < 0)
1150                 return r;
1151
1152         r = manager_get_user_from_creds(m, message, uid, error, &user);
1153         if (r < 0)
1154                 return r;
1155
1156         return bus_user_method_kill(message, user, error);
1157 }
1158
1159 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1160         Manager *m = userdata;
1161         const char *name;
1162         Session *session;
1163         int r;
1164
1165         assert(message);
1166         assert(m);
1167
1168         r = sd_bus_message_read(message, "s", &name);
1169         if (r < 0)
1170                 return r;
1171
1172         r = manager_get_session_from_creds(m, message, name, error, &session);
1173         if (r < 0)
1174                 return r;
1175
1176         return bus_session_method_terminate(message, session, error);
1177 }
1178
1179 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1180         Manager *m = userdata;
1181         uint32_t uid;
1182         User *user;
1183         int r;
1184
1185         assert(message);
1186         assert(m);
1187
1188         r = sd_bus_message_read(message, "u", &uid);
1189         if (r < 0)
1190                 return r;
1191
1192         r = manager_get_user_from_creds(m, message, uid, error, &user);
1193         if (r < 0)
1194                 return r;
1195
1196         return bus_user_method_terminate(message, user, error);
1197 }
1198
1199 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1200         Manager *m = userdata;
1201         const char *name;
1202         Seat *seat;
1203         int r;
1204
1205         assert(message);
1206         assert(m);
1207
1208         r = sd_bus_message_read(message, "s", &name);
1209         if (r < 0)
1210                 return r;
1211
1212         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1213         if (r < 0)
1214                 return r;
1215
1216         return bus_seat_method_terminate(message, seat, error);
1217 }
1218
1219 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1220         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1221         _cleanup_free_ char *cc = NULL;
1222         Manager *m = userdata;
1223         int r, b, interactive;
1224         struct passwd *pw;
1225         const char *path;
1226         uint32_t uid, auth_uid;
1227
1228         assert(message);
1229         assert(m);
1230
1231         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1232         if (r < 0)
1233                 return r;
1234
1235         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1236                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1237         if (r < 0)
1238                 return r;
1239
1240         if (!uid_is_valid(uid)) {
1241                 /* Note that we get the owner UID of the session or user unit,
1242                  * not the actual client UID here! */
1243                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1244                 if (r < 0)
1245                         return r;
1246         }
1247
1248         /* owner_uid is racy, so for authorization we must use euid */
1249         r = sd_bus_creds_get_euid(creds, &auth_uid);
1250         if (r < 0)
1251                 return r;
1252
1253         errno = 0;
1254         pw = getpwuid(uid);
1255         if (!pw)
1256                 return errno_or_else(ENOENT);
1257
1258         r = bus_verify_polkit_async(
1259                         message,
1260                         CAP_SYS_ADMIN,
1261                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1262                                           "org.freedesktop.login1.set-user-linger",
1263                         NULL,
1264                         interactive,
1265                         UID_INVALID,
1266                         &m->polkit_registry,
1267                         error);
1268         if (r < 0)
1269                 return r;
1270         if (r == 0)
1271                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1272
1273         (void) mkdir_p_label("/var/lib/systemd", 0755);
1274         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1275         if (r < 0)
1276                 return r;
1277
1278         cc = cescape(pw->pw_name);
1279         if (!cc)
1280                 return -ENOMEM;
1281
1282         path = strjoina("/var/lib/systemd/linger/", cc);
1283         if (b) {
1284                 User *u;
1285
1286                 r = touch(path);
1287                 if (r < 0)
1288                         return r;
1289
1290                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1291                         user_start(u);
1292
1293         } else {
1294                 User *u;
1295
1296                 r = unlink(path);
1297                 if (r < 0 && errno != ENOENT)
1298                         return -errno;
1299
1300                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1301                 if (u)
1302                         user_add_to_gc_queue(u);
1303         }
1304
1305         return sd_bus_reply_method_return(message, NULL);
1306 }
1307
1308 static int trigger_device(Manager *m, sd_device *d) {
1309         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
1310         int r;
1311
1312         assert(m);
1313
1314         r = sd_device_enumerator_new(&e);
1315         if (r < 0)
1316                 return r;
1317
1318         r = sd_device_enumerator_allow_uninitialized(e);
1319         if (r < 0)
1320                 return r;
1321
1322         if (d) {
1323                 r = sd_device_enumerator_add_match_parent(e, d);
1324                 if (r < 0)
1325                         return r;
1326         }
1327
1328         FOREACH_DEVICE(e, d) {
1329                 r = sd_device_trigger(d, SD_DEVICE_CHANGE);
1330                 if (r < 0)
1331                         log_device_debug_errno(d, r, "Failed to trigger device, ignoring: %m");
1332         }
1333
1334         return 0;
1335 }
1336
1337 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1338         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
1339         _cleanup_free_ char *rule = NULL, *file = NULL;
1340         const char *id_for_seat;
1341         int r;
1342
1343         assert(m);
1344         assert(seat);
1345         assert(sysfs);
1346
1347         r = sd_device_new_from_syspath(&d, sysfs);
1348         if (r < 0)
1349                 return r;
1350
1351         if (sd_device_has_current_tag(d, "seat") <= 0)
1352                 return -ENODEV;
1353
1354         if (sd_device_get_property_value(d, "ID_FOR_SEAT", &id_for_seat) < 0)
1355                 return -ENODEV;
1356
1357         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1358                 return -ENOMEM;
1359
1360         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1361                 return -ENOMEM;
1362
1363         (void) mkdir_p_label("/etc/udev/rules.d", 0755);
1364         r = write_string_file_atomic_label(file, rule);
1365         if (r < 0)
1366                 return r;
1367
1368         return trigger_device(m, d);
1369 }
1370
1371 static int flush_devices(Manager *m) {
1372         _cleanup_closedir_ DIR *d = NULL;
1373
1374         assert(m);
1375
1376         d = opendir("/etc/udev/rules.d");
1377         if (!d) {
1378                 if (errno != ENOENT)
1379                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1380         } else
1381                 FOREACH_DIRENT_ALL(de, d, break) {
1382                         if (!dirent_is_file(de))
1383                                 continue;
1384
1385                         if (!startswith(de->d_name, "72-seat-"))
1386                                 continue;
1387
1388                         if (!endswith(de->d_name, ".rules"))
1389                                 continue;
1390
1391                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1392                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1393                 }
1394
1395         return trigger_device(m, NULL);
1396 }
1397
1398 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1399         const char *sysfs, *seat;
1400         Manager *m = userdata;
1401         int interactive, r;
1402
1403         assert(message);
1404         assert(m);
1405
1406         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1407         if (r < 0)
1408                 return r;
1409
1410         if (!path_is_normalized(sysfs))
1411                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not normalized", sysfs);
1412         if (!path_startswith(sysfs, "/sys"))
1413                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1414
1415         if (SEAT_IS_SELF(seat) || SEAT_IS_AUTO(seat)) {
1416                 Seat *found;
1417
1418                 r = manager_get_seat_from_creds(m, message, seat, error, &found);
1419                 if (r < 0)
1420                         return r;
1421
1422                 seat = found->id;
1423
1424         } else if (!seat_name_is_valid(seat)) /* Note that a seat does not have to exist yet for this operation to succeed */
1425                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat name %s is not valid", seat);
1426
1427         r = bus_verify_polkit_async(
1428                         message,
1429                         CAP_SYS_ADMIN,
1430                         "org.freedesktop.login1.attach-device",
1431                         NULL,
1432                         interactive,
1433                         UID_INVALID,
1434                         &m->polkit_registry,
1435                         error);
1436         if (r < 0)
1437                 return r;
1438         if (r == 0)
1439                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1440
1441         r = attach_device(m, seat, sysfs);
1442         if (r < 0)
1443                 return r;
1444
1445         return sd_bus_reply_method_return(message, NULL);
1446 }
1447
1448 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1449         Manager *m = userdata;
1450         int interactive, r;
1451
1452         assert(message);
1453         assert(m);
1454
1455         r = sd_bus_message_read(message, "b", &interactive);
1456         if (r < 0)
1457                 return r;
1458
1459         r = bus_verify_polkit_async(
1460                         message,
1461                         CAP_SYS_ADMIN,
1462                         "org.freedesktop.login1.flush-devices",
1463                         NULL,
1464                         interactive,
1465                         UID_INVALID,
1466                         &m->polkit_registry,
1467                         error);
1468         if (r < 0)
1469                 return r;
1470         if (r == 0)
1471                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1472
1473         r = flush_devices(m);
1474         if (r < 0)
1475                 return r;
1476
1477         return sd_bus_reply_method_return(message, NULL);
1478 }
1479
1480 static int have_multiple_sessions(
1481                 Manager *m,
1482                 uid_t uid) {
1483
1484         Session *session;
1485
1486         assert(m);
1487
1488         /* Check for other users' sessions. Greeter sessions do not
1489          * count, and non-login sessions do not count either. */
1490         HASHMAP_FOREACH(session, m->sessions)
1491                 if (session->class == SESSION_USER &&
1492                     session->user->user_record->uid != uid)
1493                         return true;
1494
1495         return false;
1496 }
1497
1498 static int bus_manager_log_shutdown(
1499                 Manager *m,
1500                 const ActionTableItem *a) {
1501
1502         const char *message, *log_str;
1503
1504         assert(m);
1505         assert(a);
1506
1507         message = a->message;
1508         log_str = a->log_str;
1509
1510         if (message)
1511                 message = strjoina("MESSAGE=", message);
1512         else
1513                 message = "MESSAGE=System is shutting down";
1514
1515         if (isempty(m->wall_message))
1516                 message = strjoina(message, ".");
1517         else
1518                 message = strjoina(message, " (", m->wall_message, ").");
1519
1520         if (log_str)
1521                 log_str = strjoina("SHUTDOWN=", log_str);
1522
1523         return log_struct(LOG_NOTICE,
1524                         "MESSAGE_ID=%s", a->message_id ? a->message_id : SD_MESSAGE_SHUTDOWN_STR,
1525                         message,
1526                         log_str);
1527 }
1528
1529 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1530         Manager *m = userdata;
1531
1532         assert(e);
1533         assert(m);
1534
1535         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1536         return 0;
1537 }
1538
1539 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1540         int r;
1541
1542         assert(m);
1543
1544         if (until <= now(CLOCK_MONOTONIC))
1545                 return 0;
1546
1547         /* We want to ignore the lid switch for a while after each
1548          * suspend, and after boot-up. Hence let's install a timer for
1549          * this. As long as the event source exists we ignore the lid
1550          * switch. */
1551
1552         if (m->lid_switch_ignore_event_source) {
1553                 usec_t u;
1554
1555                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1556                 if (r < 0)
1557                         return r;
1558
1559                 if (until <= u)
1560                         return 0;
1561
1562                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1563         } else
1564                 r = sd_event_add_time(
1565                                 m->event,
1566                                 &m->lid_switch_ignore_event_source,
1567                                 CLOCK_MONOTONIC,
1568                                 until, 0,
1569                                 lid_switch_ignore_handler, m);
1570
1571         return r;
1572 }
1573
1574 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1575         int active = _active;
1576
1577         assert(m);
1578         assert(IN_SET(w, INHIBIT_SHUTDOWN, INHIBIT_SLEEP));
1579
1580         return sd_bus_emit_signal(m->bus,
1581                                   "/org/freedesktop/login1",
1582                                   "org.freedesktop.login1.Manager",
1583                                   w == INHIBIT_SHUTDOWN ? "PrepareForShutdown" : "PrepareForSleep",
1584                                   "b",
1585                                   active);
1586 }
1587
1588 static int execute_shutdown_or_sleep(
1589                 Manager *m,
1590                 const ActionTableItem *a,
1591                 sd_bus_error *error) {
1592
1593         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1594         const char *p;
1595         int r;
1596
1597         assert(m);
1598         assert(a);
1599
1600         if (a->inhibit_what == INHIBIT_SHUTDOWN)
1601                 bus_manager_log_shutdown(m, a);
1602
1603         r = bus_call_method(
1604                         m->bus,
1605                         bus_systemd_mgr,
1606                         "StartUnit",
1607                         error,
1608                         &reply,
1609                         "ss", a->target, "replace-irreversibly");
1610         if (r < 0)
1611                 goto error;
1612
1613         r = sd_bus_message_read(reply, "o", &p);
1614         if (r < 0)
1615                 goto error;
1616
1617         r = free_and_strdup(&m->action_job, p);
1618         if (r < 0)
1619                 goto error;
1620
1621         m->delayed_action = a;
1622
1623         /* Make sure the lid switch is ignored for a while */
1624         manager_set_lid_switch_ignore(m, usec_add(now(CLOCK_MONOTONIC), m->holdoff_timeout_usec));
1625
1626         return 0;
1627
1628 error:
1629         /* Tell people that they now may take a lock again */
1630         (void) send_prepare_for(m, a->inhibit_what, false);
1631
1632         return r;
1633 }
1634
1635 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1636         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1637         Inhibitor *offending = NULL;
1638         int r;
1639
1640         assert(manager);
1641
1642         if (!manager->delayed_action || manager->action_job)
1643                 return 0;
1644
1645         if (manager_is_inhibited(manager, manager->delayed_action->inhibit_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1646                 _cleanup_free_ char *comm = NULL, *u = NULL;
1647
1648                 if (!timeout)
1649                         return 0;
1650
1651                 (void) get_process_comm(offending->pid, &comm);
1652                 u = uid_to_name(offending->uid);
1653
1654                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1655                            offending->uid, strna(u),
1656                            offending->pid, strna(comm));
1657         }
1658
1659         /* Actually do the operation */
1660         r = execute_shutdown_or_sleep(manager, manager->delayed_action, &error);
1661         if (r < 0) {
1662                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1663                             bus_error_message(&error, r));
1664
1665                 manager->delayed_action = NULL;
1666         }
1667
1668         return 1; /* We did some work. */
1669 }
1670
1671 static int manager_inhibit_timeout_handler(
1672                         sd_event_source *s,
1673                         uint64_t usec,
1674                         void *userdata) {
1675
1676         Manager *manager = userdata;
1677
1678         assert(manager);
1679         assert(manager->inhibit_timeout_source == s);
1680
1681         return manager_dispatch_delayed(manager, true);
1682 }
1683
1684 static int delay_shutdown_or_sleep(
1685                 Manager *m,
1686                 const ActionTableItem *a) {
1687
1688         int r;
1689
1690         assert(m);
1691         assert(a);
1692
1693         if (m->inhibit_timeout_source) {
1694                 r = sd_event_source_set_time_relative(m->inhibit_timeout_source, m->inhibit_delay_max);
1695                 if (r < 0)
1696                         return log_error_errno(r, "sd_event_source_set_time_relative() failed: %m");
1697
1698                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1699                 if (r < 0)
1700                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1701         } else {
1702                 r = sd_event_add_time_relative(
1703                                 m->event,
1704                                 &m->inhibit_timeout_source,
1705                                 CLOCK_MONOTONIC, m->inhibit_delay_max, 0,
1706                                 manager_inhibit_timeout_handler, m);
1707                 if (r < 0)
1708                         return r;
1709         }
1710
1711         m->delayed_action = a;
1712
1713         return 0;
1714 }
1715
1716 int bus_manager_shutdown_or_sleep_now_or_later(
1717                 Manager *m,
1718                 const ActionTableItem *a,
1719                 sd_bus_error *error) {
1720
1721         _cleanup_free_ char *load_state = NULL;
1722         bool delayed;
1723         int r;
1724
1725         assert(m);
1726         assert(a);
1727         assert(!m->action_job);
1728
1729         r = unit_load_state(m->bus, a->target, &load_state);
1730         if (r < 0)
1731                 return r;
1732
1733         if (!streq(load_state, "loaded"))
1734                 return log_notice_errno(SYNTHETIC_ERRNO(EACCES),
1735                                         "Unit %s is %s, refusing operation.",
1736                                         a->target, load_state);
1737
1738         /* Tell everybody to prepare for shutdown/sleep */
1739         (void) send_prepare_for(m, a->inhibit_what, true);
1740
1741         delayed =
1742                 m->inhibit_delay_max > 0 &&
1743                 manager_is_inhibited(m, a->inhibit_what, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1744
1745         if (delayed)
1746                 /* Shutdown is delayed, keep in mind what we
1747                  * want to do, and start a timeout */
1748                 r = delay_shutdown_or_sleep(m, a);
1749         else
1750                 /* Shutdown is not delayed, execute it
1751                  * immediately */
1752                 r = execute_shutdown_or_sleep(m, a, error);
1753
1754         return r;
1755 }
1756
1757 static int verify_shutdown_creds(
1758                 Manager *m,
1759                 sd_bus_message *message,
1760                 const ActionTableItem *a,
1761                 uint64_t flags,
1762                 sd_bus_error *error) {
1763
1764         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1765         bool multiple_sessions, blocked, interactive;
1766         uid_t uid;
1767         int r;
1768
1769         assert(m);
1770         assert(a);
1771         assert(message);
1772
1773         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1774         if (r < 0)
1775                 return r;
1776
1777         r = sd_bus_creds_get_euid(creds, &uid);
1778         if (r < 0)
1779                 return r;
1780
1781         r = have_multiple_sessions(m, uid);
1782         if (r < 0)
1783                 return r;
1784
1785         multiple_sessions = r > 0;
1786         blocked = manager_is_inhibited(m, a->inhibit_what, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1787         interactive = flags & SD_LOGIND_INTERACTIVE;
1788
1789         if (multiple_sessions) {
1790                 r = bus_verify_polkit_async(
1791                                 message,
1792                                 CAP_SYS_BOOT,
1793                                 a->polkit_action_multiple_sessions,
1794                                 NULL,
1795                                 interactive,
1796                                 UID_INVALID,
1797                                 &m->polkit_registry,
1798                                 error);
1799                 if (r < 0)
1800                         return r;
1801                 if (r == 0)
1802                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1803         }
1804
1805         if (blocked) {
1806                 /* We don't check polkit for root here, because you can't be more privileged than root */
1807                 if (uid == 0 && (flags & SD_LOGIND_ROOT_CHECK_INHIBITORS))
1808                         return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED,
1809                                                  "Access denied to root due to active block inhibitor");
1810
1811                 r = bus_verify_polkit_async(message,
1812                                 CAP_SYS_BOOT,
1813                                 a->polkit_action_ignore_inhibit,
1814                                 NULL,
1815                                 interactive,
1816                                 UID_INVALID,
1817                                 &m->polkit_registry,
1818                                 error);
1819                 if (r < 0)
1820                         return r;
1821                 if (r == 0)
1822                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1823         }
1824
1825         if (!multiple_sessions && !blocked) {
1826                 r = bus_verify_polkit_async(message,
1827                                 CAP_SYS_BOOT,
1828                                 a->polkit_action,
1829                                 NULL,
1830                                 interactive,
1831                                 UID_INVALID,
1832                                 &m->polkit_registry,
1833                                 error);
1834                 if (r < 0)
1835                         return r;
1836                 if (r == 0)
1837                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1838         }
1839
1840         return 0;
1841 }
1842
1843 static int setup_wall_message_timer(Manager *m, sd_bus_message* message) {
1844         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1845         int r;
1846
1847         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
1848         if (r >= 0) {
1849                 const char *tty = NULL;
1850
1851                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
1852                 (void) sd_bus_creds_get_tty(creds, &tty);
1853
1854                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
1855                 if (r < 0)
1856                         return log_oom();
1857         }
1858
1859         r = manager_setup_wall_message_timer(m);
1860         if (r < 0)
1861                 return r;
1862
1863         return 0;
1864 }
1865
1866 static int method_do_shutdown_or_sleep(
1867                 Manager *m,
1868                 sd_bus_message *message,
1869                 const ActionTableItem *a,
1870                 bool with_flags,
1871                 sd_bus_error *error) {
1872
1873         uint64_t flags;
1874         int r;
1875
1876         assert(m);
1877         assert(message);
1878         assert(a);
1879
1880         if (with_flags) {
1881                 /* New style method: with flags parameter (and interactive bool in the bus message header) */
1882                 r = sd_bus_message_read(message, "t", &flags);
1883                 if (r < 0)
1884                         return r;
1885                 if ((flags & ~SD_LOGIND_SHUTDOWN_AND_SLEEP_FLAGS_PUBLIC) != 0)
1886                         return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid flags parameter");
1887                 if (manager_handle_for_item(a) != HANDLE_REBOOT && (flags & SD_LOGIND_REBOOT_VIA_KEXEC))
1888                         return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Reboot via kexec is only applicable with reboot operations");
1889         } else {
1890                 /* Old style method: no flags parameter, but interactive bool passed as boolean in
1891                  * payload. Let's convert this argument to the new-style flags parameter for our internal
1892                  * use. */
1893                 int interactive;
1894
1895                 r = sd_bus_message_read(message, "b", &interactive);
1896                 if (r < 0)
1897                         return r;
1898
1899                 flags = interactive ? SD_LOGIND_INTERACTIVE : 0;
1900         }
1901
1902         if ((flags & SD_LOGIND_REBOOT_VIA_KEXEC) && kexec_loaded())
1903                 a = manager_item_for_handle(HANDLE_KEXEC);
1904
1905         /* Don't allow multiple jobs being executed at the same time */
1906         if (m->delayed_action)
1907                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
1908                                          "There's already a shutdown or sleep operation in progress");
1909
1910         if (a->sleep_operation >= 0) {
1911                 r = can_sleep(a->sleep_operation);
1912                 if (r == -ENOSPC)
1913                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1914                                                 "Not enough swap space for hibernation");
1915                 if (r == 0)
1916                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1917                                                  "Sleep verb \"%s\" not supported", sleep_operation_to_string(a->sleep_operation));
1918                 if (r < 0)
1919                         return r;
1920         }
1921
1922         r = verify_shutdown_creds(m, message, a, flags, error);
1923         if (r != 0)
1924                 return r;
1925
1926         /* reset case we're shorting a scheduled shutdown */
1927         m->unlink_nologin = false;
1928         reset_scheduled_shutdown(m);
1929
1930         m->scheduled_shutdown_timeout = 0;
1931         m->scheduled_shutdown_type = a;
1932
1933         (void) setup_wall_message_timer(m, message);
1934
1935         r = bus_manager_shutdown_or_sleep_now_or_later(m, a, error);
1936         if (r < 0)
1937                 return r;
1938
1939         return sd_bus_reply_method_return(message, NULL);
1940 }
1941
1942 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1943         Manager *m = userdata;
1944
1945         return method_do_shutdown_or_sleep(
1946                         m, message,
1947                         manager_item_for_handle(HANDLE_POWEROFF),
1948                         sd_bus_message_is_method_call(message, NULL, "PowerOffWithFlags"),
1949                         error);
1950 }
1951
1952 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1953         Manager *m = userdata;
1954
1955         return method_do_shutdown_or_sleep(
1956                         m, message,
1957                         manager_item_for_handle(HANDLE_REBOOT),
1958                         sd_bus_message_is_method_call(message, NULL, "RebootWithFlags"),
1959                         error);
1960 }
1961
1962 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1963         Manager *m = userdata;
1964
1965         return method_do_shutdown_or_sleep(
1966                         m, message,
1967                         manager_item_for_handle(HANDLE_HALT),
1968                         sd_bus_message_is_method_call(message, NULL, "HaltWithFlags"),
1969                         error);
1970 }
1971
1972 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1973         Manager *m = userdata;
1974
1975         return method_do_shutdown_or_sleep(
1976                         m, message,
1977                         manager_item_for_handle(HANDLE_SUSPEND),
1978                         sd_bus_message_is_method_call(message, NULL, "SuspendWithFlags"),
1979                         error);
1980 }
1981
1982 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1983         Manager *m = userdata;
1984
1985         return method_do_shutdown_or_sleep(
1986                         m, message,
1987                         manager_item_for_handle(HANDLE_HIBERNATE),
1988                         sd_bus_message_is_method_call(message, NULL, "HibernateWithFlags"),
1989                         error);
1990 }
1991
1992 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1993         Manager *m = userdata;
1994
1995         return method_do_shutdown_or_sleep(
1996                         m, message,
1997                         manager_item_for_handle(HANDLE_HYBRID_SLEEP),
1998                         sd_bus_message_is_method_call(message, NULL, "HybridSleepWithFlags"),
1999                         error);
2000 }
2001
2002 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2003         Manager *m = userdata;
2004
2005         return method_do_shutdown_or_sleep(
2006                         m, message,
2007                         manager_item_for_handle(HANDLE_SUSPEND_THEN_HIBERNATE),
2008                         sd_bus_message_is_method_call(message, NULL, "SuspendThenHibernateWithFlags"),
2009                         error);
2010 }
2011
2012 static int nologin_timeout_handler(
2013                         sd_event_source *s,
2014                         uint64_t usec,
2015                         void *userdata) {
2016
2017         Manager *m = userdata;
2018
2019         log_info("Creating /run/nologin, blocking further logins...");
2020
2021         m->unlink_nologin =
2022                 create_shutdown_run_nologin_or_warn() >= 0;
2023
2024         return 0;
2025 }
2026
2027 static usec_t nologin_timeout_usec(usec_t elapse) {
2028         /* Issue /run/nologin five minutes before shutdown */
2029         return LESS_BY(elapse, 5 * USEC_PER_MINUTE);
2030 }
2031
2032 static int update_schedule_file(Manager *m) {
2033         _cleanup_free_ char *temp_path = NULL;
2034         _cleanup_fclose_ FILE *f = NULL;
2035         int r;
2036
2037         assert(m);
2038
2039         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
2040         if (r < 0)
2041                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
2042
2043         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
2044         if (r < 0)
2045                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
2046
2047         (void) fchmod(fileno(f), 0644);
2048
2049         fprintf(f,
2050                 "USEC="USEC_FMT"\n"
2051                 "WARN_WALL=%i\n"
2052                 "MODE=%s\n",
2053                 m->scheduled_shutdown_timeout,
2054                 m->enable_wall_messages,
2055                 handle_action_to_string(manager_handle_for_item(m->scheduled_shutdown_type)));
2056
2057         if (!isempty(m->wall_message)) {
2058                 _cleanup_free_ char *t = NULL;
2059
2060                 t = cescape(m->wall_message);
2061                 if (!t) {
2062                         r = -ENOMEM;
2063                         goto fail;
2064                 }
2065
2066                 fprintf(f, "WALL_MESSAGE=%s\n", t);
2067         }
2068
2069         r = fflush_and_check(f);
2070         if (r < 0)
2071                 goto fail;
2072
2073         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2074                 r = -errno;
2075                 goto fail;
2076         }
2077
2078         return 0;
2079
2080 fail:
2081         (void) unlink(temp_path);
2082         (void) unlink("/run/systemd/shutdown/scheduled");
2083
2084         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2085 }
2086
2087 static void reset_scheduled_shutdown(Manager *m) {
2088         assert(m);
2089
2090         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2091         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
2092         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
2093
2094         m->scheduled_shutdown_type = NULL;
2095         m->shutdown_dry_run = false;
2096
2097         if (m->unlink_nologin) {
2098                 (void) unlink_or_warn("/run/nologin");
2099                 m->unlink_nologin = false;
2100         }
2101
2102         (void) unlink("/run/systemd/shutdown/scheduled");
2103 }
2104
2105 static int manager_scheduled_shutdown_handler(
2106                         sd_event_source *s,
2107                         uint64_t usec,
2108                         void *userdata) {
2109
2110         const ActionTableItem *a = NULL;
2111         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2112         Manager *m = userdata;
2113         int r;
2114
2115         assert(m);
2116
2117         a = m->scheduled_shutdown_type;
2118         assert(a);
2119
2120         /* Don't allow multiple jobs being executed at the same time */
2121         if (m->delayed_action) {
2122                 r = -EALREADY;
2123                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", a->target);
2124                 goto error;
2125         }
2126
2127         if (m->shutdown_dry_run) {
2128                 /* We do not process delay inhibitors here.  Otherwise, we
2129                  * would have to be considered "in progress" (like the check
2130                  * above) for some seconds after our admin has seen the final
2131                  * wall message. */
2132
2133                 bus_manager_log_shutdown(m, a);
2134                 log_info("Running in dry run, suppressing action.");
2135                 reset_scheduled_shutdown(m);
2136
2137                 return 0;
2138         }
2139
2140         r = bus_manager_shutdown_or_sleep_now_or_later(m, m->scheduled_shutdown_type, &error);
2141         if (r < 0) {
2142                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", a->target);
2143                 goto error;
2144         }
2145
2146         return 0;
2147
2148 error:
2149         reset_scheduled_shutdown(m);
2150         return r;
2151 }
2152
2153 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2154         Manager *m = userdata;
2155         HandleAction handle;
2156         const ActionTableItem *a;
2157         uint64_t elapse;
2158         char *type;
2159         int r;
2160         bool dry_run = false;
2161
2162         assert(m);
2163         assert(message);
2164
2165         r = sd_bus_message_read(message, "st", &type, &elapse);
2166         if (r < 0)
2167                 return r;
2168
2169         if (startswith(type, "dry-")) {
2170                 type += 4;
2171                 dry_run = true;
2172         }
2173
2174         handle = handle_action_from_string(type);
2175         if (!IN_SET(handle, HANDLE_POWEROFF, HANDLE_REBOOT, HANDLE_HALT, HANDLE_KEXEC))
2176                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2177
2178         a = manager_item_for_handle(handle);
2179         assert(a);
2180         assert(a->polkit_action);
2181
2182         r = verify_shutdown_creds(m, message, a, 0, error);
2183         if (r != 0)
2184                 return r;
2185
2186         if (m->scheduled_shutdown_timeout_source) {
2187                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2188                 if (r < 0)
2189                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2190
2191                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2192                 if (r < 0)
2193                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2194         } else {
2195                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2196                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2197                 if (r < 0)
2198                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2199         }
2200
2201         m->scheduled_shutdown_type = a;
2202         m->shutdown_dry_run = dry_run;
2203
2204         if (m->nologin_timeout_source) {
2205                 r = sd_event_source_set_time(m->nologin_timeout_source, nologin_timeout_usec(elapse));
2206                 if (r < 0)
2207                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2208
2209                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2210                 if (r < 0)
2211                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2212         } else {
2213                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2214                                       CLOCK_REALTIME, nologin_timeout_usec(elapse), 0, nologin_timeout_handler, m);
2215                 if (r < 0)
2216                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2217         }
2218
2219         m->scheduled_shutdown_timeout = elapse;
2220
2221         r = setup_wall_message_timer(m, message);
2222         if (r < 0) {
2223                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2224                 return r;
2225         }
2226
2227         r = update_schedule_file(m);
2228         if (r < 0)
2229                 return r;
2230
2231         return sd_bus_reply_method_return(message, NULL);
2232 }
2233
2234 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2235         Manager *m = userdata;
2236         const ActionTableItem *a;
2237         bool cancelled;
2238         int r;
2239
2240         assert(m);
2241         assert(message);
2242
2243         cancelled = !IN_SET(manager_handle_for_item(m->scheduled_shutdown_type), HANDLE_IGNORE, _HANDLE_ACTION_INVALID);
2244         if (!cancelled)
2245                 goto done;
2246
2247         a = m->scheduled_shutdown_type;
2248         if (!a->polkit_action)
2249                 return sd_bus_error_set(error, SD_BUS_ERROR_AUTH_FAILED, "Unsupported shutdown type");
2250
2251         r = bus_verify_polkit_async(
2252                         message,
2253                         CAP_SYS_BOOT,
2254                         a->polkit_action,
2255                         NULL,
2256                         false,
2257                         UID_INVALID,
2258                         &m->polkit_registry,
2259                         error);
2260         if (r < 0)
2261                 return r;
2262         if (r == 0)
2263                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2264
2265         reset_scheduled_shutdown(m);
2266
2267         if (m->enable_wall_messages) {
2268                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2269                 _cleanup_free_ char *username = NULL;
2270                 const char *tty = NULL;
2271                 uid_t uid = 0;
2272
2273                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2274                 if (r >= 0) {
2275                         (void) sd_bus_creds_get_uid(creds, &uid);
2276                         (void) sd_bus_creds_get_tty(creds, &tty);
2277                 }
2278
2279                 username = uid_to_name(uid);
2280                 utmp_wall("The system shutdown has been cancelled",
2281                           username, tty, logind_wall_tty_filter, m);
2282         }
2283
2284 done:
2285         return sd_bus_reply_method_return(message, "b", cancelled);
2286 }
2287
2288 static int method_can_shutdown_or_sleep(
2289                 Manager *m,
2290                 sd_bus_message *message,
2291                 const ActionTableItem *a,
2292                 sd_bus_error *error) {
2293
2294         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2295         bool multiple_sessions, challenge, blocked;
2296         const char *result = NULL;
2297         uid_t uid;
2298         int r;
2299
2300         assert(m);
2301         assert(message);
2302         assert(a);
2303
2304         if (a->sleep_operation >= 0) {
2305                 r = can_sleep(a->sleep_operation);
2306                 if (IN_SET(r,  0, -ENOSPC))
2307                         return sd_bus_reply_method_return(message, "s", "na");
2308                 if (r < 0)
2309                         return r;
2310         }
2311
2312         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2313         if (r < 0)
2314                 return r;
2315
2316         r = sd_bus_creds_get_euid(creds, &uid);
2317         if (r < 0)
2318                 return r;
2319
2320         r = have_multiple_sessions(m, uid);
2321         if (r < 0)
2322                 return r;
2323
2324         multiple_sessions = r > 0;
2325         blocked = manager_is_inhibited(m, a->inhibit_what, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2326
2327         HandleAction handle = handle_action_from_string(sleep_operation_to_string(a->sleep_operation));
2328         if (handle >= 0) {
2329                 const char *target;
2330
2331                 target = manager_target_for_action(handle);
2332                 if (target) {
2333                         _cleanup_free_ char *load_state = NULL;
2334
2335                         r = unit_load_state(m->bus, target, &load_state);
2336                         if (r < 0)
2337                                 return r;
2338
2339                         if (!streq(load_state, "loaded")) {
2340                                 result = "no";
2341                                 goto finish;
2342                         }
2343                 }
2344         }
2345
2346         if (multiple_sessions) {
2347                 r = bus_test_polkit(message, CAP_SYS_BOOT, a->polkit_action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2348                 if (r < 0)
2349                         return r;
2350
2351                 if (r > 0)
2352                         result = "yes";
2353                 else if (challenge)
2354                         result = "challenge";
2355                 else
2356                         result = "no";
2357         }
2358
2359         if (blocked) {
2360                 r = bus_test_polkit(message, CAP_SYS_BOOT, a->polkit_action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2361                 if (r < 0)
2362                         return r;
2363
2364                 if (r > 0) {
2365                         if (!result)
2366                                 result = "yes";
2367                 } else if (challenge) {
2368                         if (!result || streq(result, "yes"))
2369                                 result = "challenge";
2370                 } else
2371                         result = "no";
2372         }
2373
2374         if (!multiple_sessions && !blocked) {
2375                 /* If neither inhibit nor multiple sessions
2376                  * apply then just check the normal policy */
2377
2378                 r = bus_test_polkit(message, CAP_SYS_BOOT, a->polkit_action, NULL, UID_INVALID, &challenge, error);
2379                 if (r < 0)
2380                         return r;
2381
2382                 if (r > 0)
2383                         result = "yes";
2384                 else if (challenge)
2385                         result = "challenge";
2386                 else
2387                         result = "no";
2388         }
2389
2390  finish:
2391         return sd_bus_reply_method_return(message, "s", result);
2392 }
2393
2394 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2395         Manager *m = userdata;
2396
2397         return method_can_shutdown_or_sleep(
2398                         m, message, manager_item_for_handle(HANDLE_POWEROFF),
2399                         error);
2400 }
2401
2402 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2403         Manager *m = userdata;
2404
2405         return method_can_shutdown_or_sleep(
2406                         m, message, manager_item_for_handle(HANDLE_REBOOT),
2407                         error);
2408 }
2409
2410 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2411         Manager *m = userdata;
2412
2413         return method_can_shutdown_or_sleep(
2414                         m, message, manager_item_for_handle(HANDLE_HALT),
2415                         error);
2416 }
2417
2418 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2419         Manager *m = userdata;
2420
2421         return method_can_shutdown_or_sleep(
2422                         m, message, manager_item_for_handle(HANDLE_SUSPEND),
2423                         error);
2424 }
2425
2426 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2427         Manager *m = userdata;
2428
2429         return method_can_shutdown_or_sleep(
2430                         m, message, manager_item_for_handle(HANDLE_HIBERNATE),
2431                         error);
2432 }
2433
2434 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2435         Manager *m = userdata;
2436
2437         return method_can_shutdown_or_sleep(
2438                         m, message, manager_item_for_handle(HANDLE_HYBRID_SLEEP),
2439                         error);
2440 }
2441
2442 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2443         Manager *m = userdata;
2444
2445         return method_can_shutdown_or_sleep(
2446                         m, message, manager_item_for_handle(HANDLE_SUSPEND_THEN_HIBERNATE),
2447                         error);
2448 }
2449
2450 static int property_get_reboot_parameter(
2451                 sd_bus *bus,
2452                 const char *path,
2453                 const char *interface,
2454                 const char *property,
2455                 sd_bus_message *reply,
2456                 void *userdata,
2457                 sd_bus_error *error) {
2458         _cleanup_free_ char *parameter = NULL;
2459         int r;
2460
2461         assert(bus);
2462         assert(reply);
2463         assert(userdata);
2464
2465         r = read_reboot_parameter(&parameter);
2466         if (r < 0)
2467                 return r;
2468
2469         return sd_bus_message_append(reply, "s", parameter);
2470 }
2471
2472 static int method_set_reboot_parameter(
2473                 sd_bus_message *message,
2474                 void *userdata,
2475                 sd_bus_error *error) {
2476
2477         Manager *m = userdata;
2478         const char *arg;
2479         int r;
2480
2481         assert(message);
2482         assert(m);
2483
2484         r = sd_bus_message_read(message, "s", &arg);
2485         if (r < 0)
2486                 return r;
2487
2488         r = detect_container();
2489         if (r < 0)
2490                 return r;
2491         if (r > 0)
2492                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
2493                                          "Reboot parameter not supported in containers, refusing.");
2494
2495         r = bus_verify_polkit_async(message,
2496                                     CAP_SYS_ADMIN,
2497                                     "org.freedesktop.login1.set-reboot-parameter",
2498                                     NULL,
2499                                     false,
2500                                     UID_INVALID,
2501                                     &m->polkit_registry,
2502                                     error);
2503         if (r < 0)
2504                 return r;
2505         if (r == 0)
2506                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2507
2508         r = update_reboot_parameter_and_warn(arg, false);
2509         if (r < 0)
2510                 return r;
2511
2512         return sd_bus_reply_method_return(message, NULL);
2513 }
2514
2515 static int method_can_reboot_parameter(
2516                 sd_bus_message *message,
2517                 void *userdata,
2518                 sd_bus_error *error) {
2519
2520         _unused_ Manager *m = userdata;
2521         int r;
2522
2523         assert(message);
2524         assert(m);
2525
2526         r = detect_container();
2527         if (r < 0)
2528                 return r;
2529         if (r > 0) /* Inside containers, specifying a reboot parameter, doesn't make much sense */
2530                 return sd_bus_reply_method_return(message, "s", "na");
2531
2532         return return_test_polkit(
2533                         message,
2534                         CAP_SYS_ADMIN,
2535                         "org.freedesktop.login1.set-reboot-parameter",
2536                         NULL,
2537                         UID_INVALID,
2538                         error);
2539 }
2540
2541 static int property_get_reboot_to_firmware_setup(
2542                 sd_bus *bus,
2543                 const char *path,
2544                 const char *interface,
2545                 const char *property,
2546                 sd_bus_message *reply,
2547                 void *userdata,
2548                 sd_bus_error *error) {
2549         int r;
2550
2551         assert(bus);
2552         assert(reply);
2553         assert(userdata);
2554
2555         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2556         if (r == -ENXIO) {
2557                 /* EFI case: let's see what is currently configured in the EFI variables */
2558                 r = efi_get_reboot_to_firmware();
2559                 if (r < 0 && r != -EOPNOTSUPP)
2560                         log_warning_errno(r, "Failed to determine reboot-to-firmware-setup state: %m");
2561         } else if (r < 0)
2562                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2563         else if (r > 0) {
2564                 /* Non-EFI case: let's see whether /run/systemd/reboot-to-firmware-setup exists. */
2565                 if (access("/run/systemd/reboot-to-firmware-setup", F_OK) < 0) {
2566                         if (errno != ENOENT)
2567                                 log_warning_errno(errno, "Failed to check whether /run/systemd/reboot-to-firmware-setup exists: %m");
2568
2569                         r = false;
2570                 } else
2571                         r = true;
2572         }
2573
2574         return sd_bus_message_append(reply, "b", r > 0);
2575 }
2576
2577 static int method_set_reboot_to_firmware_setup(
2578                 sd_bus_message *message,
2579                 void *userdata,
2580                 sd_bus_error *error) {
2581
2582         Manager *m = userdata;
2583         bool use_efi;
2584         int b, r;
2585
2586         assert(message);
2587         assert(m);
2588
2589         r = sd_bus_message_read(message, "b", &b);
2590         if (r < 0)
2591                 return r;
2592
2593         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2594         if (r == -ENXIO) {
2595                 /* EFI case: let's see what the firmware supports */
2596
2597                 r = efi_reboot_to_firmware_supported();
2598                 if (r == -EOPNOTSUPP)
2599                         return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2600                 if (r < 0)
2601                         return r;
2602
2603                 use_efi = true;
2604
2605         } else if (r <= 0) {
2606                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to off */
2607
2608                 if (r < 0)
2609                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2610
2611                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2612         } else
2613                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to on */
2614                 use_efi = false;
2615
2616         r = bus_verify_polkit_async(message,
2617                                     CAP_SYS_ADMIN,
2618                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2619                                     NULL,
2620                                     false,
2621                                     UID_INVALID,
2622                                     &m->polkit_registry,
2623                                     error);
2624         if (r < 0)
2625                 return r;
2626         if (r == 0)
2627                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2628
2629         if (use_efi) {
2630                 r = efi_set_reboot_to_firmware(b);
2631                 if (r < 0)
2632                         return r;
2633         } else {
2634                 if (b) {
2635                         r = touch("/run/systemd/reboot-to-firmware-setup");
2636                         if (r < 0)
2637                                 return r;
2638                 } else {
2639                         if (unlink("/run/systemd/reboot-to-firmware-setup") < 0 && errno != ENOENT)
2640                                 return -errno;
2641                 }
2642         }
2643
2644         return sd_bus_reply_method_return(message, NULL);
2645 }
2646
2647 static int method_can_reboot_to_firmware_setup(
2648                 sd_bus_message *message,
2649                 void *userdata,
2650                 sd_bus_error *error) {
2651
2652         _unused_ Manager *m = userdata;
2653         int r;
2654
2655         assert(message);
2656         assert(m);
2657
2658         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2659         if (r == -ENXIO) {
2660                 /* EFI case: let's see what the firmware supports */
2661
2662                 r = efi_reboot_to_firmware_supported();
2663                 if (r < 0) {
2664                         if (r != -EOPNOTSUPP)
2665                                 log_warning_errno(r, "Failed to determine whether reboot to firmware is supported: %m");
2666
2667                         return sd_bus_reply_method_return(message, "s", "na");
2668                 }
2669
2670         } else if (r <= 0) {
2671                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP */
2672
2673                 if (r < 0)
2674                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2675
2676                 return sd_bus_reply_method_return(message, "s", "na");
2677         }
2678
2679         return return_test_polkit(
2680                         message,
2681                         CAP_SYS_ADMIN,
2682                         "org.freedesktop.login1.set-reboot-to-firmware-setup",
2683                         NULL,
2684                         UID_INVALID,
2685                         error);
2686 }
2687
2688 static int property_get_reboot_to_boot_loader_menu(
2689                 sd_bus *bus,
2690                 const char *path,
2691                 const char *interface,
2692                 const char *property,
2693                 sd_bus_message *reply,
2694                 void *userdata,
2695                 sd_bus_error *error) {
2696
2697         uint64_t x = UINT64_MAX;
2698         int r;
2699
2700         assert(bus);
2701         assert(reply);
2702         assert(userdata);
2703
2704         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2705         if (r == -ENXIO) {
2706                 /* EFI case: returns the current value of LoaderConfigTimeoutOneShot. Three cases are distuingished:
2707                  *
2708                  *     1. Variable not set, boot into boot loader menu is not enabled (we return UINT64_MAX to the user)
2709                  *     2. Variable set to "0", boot into boot loader menu is enabled with no timeout (we return 0 to the user)
2710                  *     3. Variable set to numeric value formatted in ASCII, boot into boot loader menu with the specified timeout in seconds
2711                  */
2712
2713                 r = efi_loader_get_config_timeout_one_shot(&x);
2714                 if (r < 0) {
2715                         if (r != -ENOENT)
2716                                 log_warning_errno(r, "Failed to read LoaderConfigTimeoutOneShot variable, ignoring: %m");
2717                 }
2718
2719         } else if (r < 0)
2720                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2721         else if (r > 0) {
2722                 _cleanup_free_ char *v = NULL;
2723
2724                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-menu. */
2725
2726                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-menu", &v);
2727                 if (r < 0) {
2728                         if (r != -ENOENT)
2729                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-menu: %m");
2730                 } else {
2731                         r = safe_atou64(v, &x);
2732                         if (r < 0)
2733                                 log_warning_errno(r, "Failed to parse /run/systemd/reboot-to-boot-loader-menu: %m");
2734                 }
2735         }
2736
2737         return sd_bus_message_append(reply, "t", x);
2738 }
2739
2740 static int method_set_reboot_to_boot_loader_menu(
2741                 sd_bus_message *message,
2742                 void *userdata,
2743                 sd_bus_error *error) {
2744
2745         Manager *m = userdata;
2746         bool use_efi;
2747         uint64_t x;
2748         int r;
2749
2750         assert(message);
2751         assert(m);
2752
2753         r = sd_bus_message_read(message, "t", &x);
2754         if (r < 0)
2755                 return r;
2756
2757         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2758         if (r == -ENXIO) {
2759                 uint64_t features;
2760
2761                 /* EFI case: let's see if booting into boot loader menu is supported. */
2762
2763                 r = efi_loader_get_features(&features);
2764                 if (r < 0)
2765                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
2766                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
2767                         return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
2768
2769                 use_efi = true;
2770
2771         } else if (r <= 0) {
2772                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to off */
2773
2774                 if (r < 0)
2775                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2776
2777                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
2778         } else
2779                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to on */
2780                 use_efi = false;
2781
2782         r = bus_verify_polkit_async(message,
2783                                     CAP_SYS_ADMIN,
2784                                     "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
2785                                     NULL,
2786                                     false,
2787                                     UID_INVALID,
2788                                     &m->polkit_registry,
2789                                     error);
2790         if (r < 0)
2791                 return r;
2792         if (r == 0)
2793                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2794
2795         if (use_efi) {
2796                 if (x == UINT64_MAX)
2797                         r = efi_set_variable(EFI_LOADER_VARIABLE(LoaderConfigTimeoutOneShot), NULL, 0);
2798                 else {
2799                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
2800                         xsprintf(buf, "%" PRIu64, DIV_ROUND_UP(x, USEC_PER_SEC)); /* second granularity */
2801
2802                         r = efi_set_variable_string(EFI_LOADER_VARIABLE(LoaderConfigTimeoutOneShot), buf);
2803                 }
2804                 if (r < 0)
2805                         return r;
2806         } else {
2807                 if (x == UINT64_MAX) {
2808                         if (unlink("/run/systemd/reboot-to-boot-loader-menu") < 0 && errno != ENOENT)
2809                                 return -errno;
2810                 } else {
2811                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
2812
2813                         xsprintf(buf, "%" PRIu64, x); /* µs granularity */
2814
2815                         r = write_string_file_atomic_label("/run/systemd/reboot-to-boot-loader-menu", buf);
2816                         if (r < 0)
2817                                 return r;
2818                 }
2819         }
2820
2821         return sd_bus_reply_method_return(message, NULL);
2822 }
2823
2824 static int method_can_reboot_to_boot_loader_menu(
2825                 sd_bus_message *message,
2826                 void *userdata,
2827                 sd_bus_error *error) {
2828
2829         _unused_ Manager *m = userdata;
2830         int r;
2831
2832         assert(message);
2833         assert(m);
2834
2835         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2836         if (r == -ENXIO) {
2837                 uint64_t features = 0;
2838
2839                 /* EFI case, let's see if booting into boot loader menu is supported. */
2840
2841                 r = efi_loader_get_features(&features);
2842                 if (r < 0)
2843                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
2844                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
2845                         return sd_bus_reply_method_return(message, "s", "na");
2846
2847         } else if (r <= 0) {
2848                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU */
2849
2850                 if (r < 0)
2851                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2852
2853                 return sd_bus_reply_method_return(message, "s", "na");
2854         }
2855
2856         return return_test_polkit(
2857                         message,
2858                         CAP_SYS_ADMIN,
2859                         "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
2860                         NULL,
2861                         UID_INVALID,
2862                         error);
2863 }
2864
2865 static int property_get_reboot_to_boot_loader_entry(
2866                 sd_bus *bus,
2867                 const char *path,
2868                 const char *interface,
2869                 const char *property,
2870                 sd_bus_message *reply,
2871                 void *userdata,
2872                 sd_bus_error *error) {
2873
2874         _cleanup_free_ char *v = NULL;
2875         Manager *m = userdata;
2876         const char *x = NULL;
2877         int r;
2878
2879         assert(bus);
2880         assert(reply);
2881         assert(m);
2882
2883         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
2884         if (r == -ENXIO) {
2885                 /* EFI case: let's read the LoaderEntryOneShot variable */
2886
2887                 r = efi_loader_update_entry_one_shot_cache(&m->efi_loader_entry_one_shot, &m->efi_loader_entry_one_shot_stat);
2888                 if (r < 0) {
2889                         if (r != -ENOENT)
2890                                 log_warning_errno(r, "Failed to read LoaderEntryOneShot variable, ignoring: %m");
2891                 } else
2892                         x = m->efi_loader_entry_one_shot;
2893
2894         } else if (r < 0)
2895                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
2896         else if (r > 0) {
2897
2898                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-entry. */
2899
2900                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-entry", &v);
2901                 if (r < 0) {
2902                         if (r != -ENOENT)
2903                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-entry, ignoring: %m");
2904                 } else if (!efi_loader_entry_name_valid(v))
2905                         log_warning("/run/systemd/reboot-to-boot-loader-entry is not valid, ignoring.");
2906                 else
2907                         x = v;
2908         }
2909
2910         return sd_bus_message_append(reply, "s", x);
2911 }
2912
2913 static int boot_loader_entry_exists(Manager *m, const char *id) {
2914         _cleanup_(boot_config_free) BootConfig config = {};
2915         int r;
2916
2917         assert(m);
2918         assert(id);
2919
2920         r = boot_entries_load_config_auto(NULL, NULL, &config);
2921         if (r < 0 && r != -ENOKEY) /* don't complain if no GPT is found, hence skip ENOKEY */
2922                 return r;
2923
2924         r = manager_read_efi_boot_loader_entries(m);
2925         if (r >= 0)
2926                 (void) boot_entries_augment_from_loader(&config, m->efi_boot_loader_entries);
2927
2928         return boot_config_has_entry(&config, id);
2929 }
2930
2931 static int method_set_reboot_to_boot_loader_entry(
2932                 sd_bus_message *message,
2933                 void *userdata,
2934                 sd_bus_error *error) {
2935
2936         Manager *m = userdata;
2937         bool use_efi;
2938         const char *v;
2939         int r;
2940
2941         assert(message);
2942         assert(m);
2943
2944         r = sd_bus_message_read(message, "s", &v);
2945         if (r < 0)
2946                 return r;
2947
2948         if (isempty(v))
2949                 v = NULL;
2950         else if (efi_loader_entry_name_valid(v)) {
2951                 r = boot_loader_entry_exists(m, v);
2952                 if (r < 0)
2953                         return r;
2954                 if (r == 0)
2955                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader entry '%s' is not known.", v);
2956         } else
2957                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Boot loader entry name '%s' is not valid, refusing.", v);
2958
2959         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
2960         if (r == -ENXIO) {
2961                 uint64_t features;
2962
2963                 /* EFI case: let's see if booting into boot loader entry is supported. */
2964
2965                 r = efi_loader_get_features(&features);
2966                 if (r < 0)
2967                         log_warning_errno(r, "Failed to determine whether reboot into boot loader entry is supported: %m");
2968                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
2969                         return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
2970
2971                 use_efi = true;
2972
2973         } else if (r <= 0) {
2974                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to off */
2975
2976                 if (r < 0)
2977                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
2978
2979                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
2980         } else
2981                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to on */
2982                 use_efi = false;
2983
2984         r = bus_verify_polkit_async(message,
2985                                     CAP_SYS_ADMIN,
2986                                     "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
2987                                     NULL,
2988                                     false,
2989                                     UID_INVALID,
2990                                     &m->polkit_registry,
2991                                     error);
2992         if (r < 0)
2993                 return r;
2994         if (r == 0)
2995                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2996
2997         if (use_efi) {
2998                 if (isempty(v))
2999                         /* Delete item */
3000                         r = efi_set_variable(EFI_LOADER_VARIABLE(LoaderEntryOneShot), NULL, 0);
3001                 else
3002                         r = efi_set_variable_string(EFI_LOADER_VARIABLE(LoaderEntryOneShot), v);
3003                 if (r < 0)
3004                         return r;
3005         } else {
3006                 if (isempty(v)) {
3007                         if (unlink("/run/systemd/reboot-to-boot-loader-entry") < 0 && errno != ENOENT)
3008                                 return -errno;
3009                 } else {
3010                         r = write_string_file_atomic_label("/run/systemd/reboot-boot-to-loader-entry", v);
3011                         if (r < 0)
3012                                 return r;
3013                 }
3014         }
3015
3016         return sd_bus_reply_method_return(message, NULL);
3017 }
3018
3019 static int method_can_reboot_to_boot_loader_entry(
3020                 sd_bus_message *message,
3021                 void *userdata,
3022                 sd_bus_error *error) {
3023
3024         _unused_ Manager *m = userdata;
3025         int r;
3026
3027         assert(message);
3028         assert(m);
3029
3030         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3031         if (r == -ENXIO) {
3032                 uint64_t features = 0;
3033
3034                 /* EFI case, let's see if booting into boot loader entry is supported. */
3035
3036                 r = efi_loader_get_features(&features);
3037                 if (r < 0)
3038                         log_warning_errno(r, "Failed to determine whether reboot to boot loader entry is supported: %m");
3039                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3040                         return sd_bus_reply_method_return(message, "s", "na");
3041
3042         } else if (r <= 0) {
3043                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY */
3044
3045                 if (r < 0)
3046                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3047
3048                 return sd_bus_reply_method_return(message, "s", "na");
3049         }
3050
3051         return return_test_polkit(
3052                         message,
3053                         CAP_SYS_ADMIN,
3054                         "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3055                         NULL,
3056                         UID_INVALID,
3057                         error);
3058 }
3059
3060 static int property_get_boot_loader_entries(
3061                 sd_bus *bus,
3062                 const char *path,
3063                 const char *interface,
3064                 const char *property,
3065                 sd_bus_message *reply,
3066                 void *userdata,
3067                 sd_bus_error *error) {
3068
3069         _cleanup_(boot_config_free) BootConfig config = {};
3070         Manager *m = userdata;
3071         size_t i;
3072         int r;
3073
3074         assert(bus);
3075         assert(reply);
3076         assert(m);
3077
3078         r = boot_entries_load_config_auto(NULL, NULL, &config);
3079         if (r < 0 && r != -ENOKEY) /* don't complain if there's no GPT found */
3080                 return r;
3081
3082         r = manager_read_efi_boot_loader_entries(m);
3083         if (r >= 0)
3084                 (void) boot_entries_augment_from_loader(&config, m->efi_boot_loader_entries);
3085
3086         r = sd_bus_message_open_container(reply, 'a', "s");
3087         if (r < 0)
3088                 return r;
3089
3090         for (i = 0; i < config.n_entries; i++) {
3091                 BootEntry *e = config.entries + i;
3092
3093                 r = sd_bus_message_append(reply, "s", e->id);
3094                 if (r < 0)
3095                         return r;
3096         }
3097
3098         return sd_bus_message_close_container(reply);
3099 }
3100
3101 static int method_set_wall_message(
3102                 sd_bus_message *message,
3103                 void *userdata,
3104                 sd_bus_error *error) {
3105
3106         int r;
3107         Manager *m = userdata;
3108         char *wall_message;
3109         unsigned enable_wall_messages;
3110
3111         assert(message);
3112         assert(m);
3113
3114         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
3115         if (r < 0)
3116                 return r;
3117
3118         /* sysvinit has a 252 (256-(strlen(" \r\n")+1)) character
3119          * limit for the wall message. There is no real technical
3120          * need for that but doesn't make sense to store arbitrary
3121          * armounts either.
3122          * https://git.savannah.nongnu.org/cgit/sysvinit.git/tree/src/shutdown.c#n72)
3123         */
3124         if (strlen(wall_message) > 252)
3125                 return -EMSGSIZE;
3126
3127         /* Short-circuit the operation if the desired state is already in place, to
3128          * avoid an unnecessary polkit permission check. */
3129         if (streq_ptr(m->wall_message, empty_to_null(wall_message)) &&
3130             m->enable_wall_messages == enable_wall_messages)
3131                 goto done;
3132
3133         r = bus_verify_polkit_async(message,
3134                                     CAP_SYS_ADMIN,
3135                                     "org.freedesktop.login1.set-wall-message",
3136                                     NULL,
3137                                     false,
3138                                     UID_INVALID,
3139                                     &m->polkit_registry,
3140                                     error);
3141         if (r < 0)
3142                 return r;
3143         if (r == 0)
3144                 return 1; /* Will call us back */
3145
3146         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
3147         if (r < 0)
3148                 return log_oom();
3149
3150         m->enable_wall_messages = enable_wall_messages;
3151
3152  done:
3153         return sd_bus_reply_method_return(message, NULL);
3154 }
3155
3156 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3157         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3158         const char *who, *why, *what, *mode;
3159         _cleanup_free_ char *id = NULL;
3160         _cleanup_close_ int fifo_fd = -1;
3161         Manager *m = userdata;
3162         InhibitMode mm;
3163         InhibitWhat w;
3164         pid_t pid;
3165         uid_t uid;
3166         int r;
3167
3168         assert(message);
3169         assert(m);
3170
3171         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
3172         if (r < 0)
3173                 return r;
3174
3175         w = inhibit_what_from_string(what);
3176         if (w <= 0)
3177                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3178                                          "Invalid what specification %s", what);
3179
3180         mm = inhibit_mode_from_string(mode);
3181         if (mm < 0)
3182                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3183                                          "Invalid mode specification %s", mode);
3184
3185         /* Delay is only supported for shutdown/sleep */
3186         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
3187                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3188                                          "Delay inhibitors only supported for shutdown and sleep");
3189
3190         /* Don't allow taking delay locks while we are already
3191          * executing the operation. We shouldn't create the impression
3192          * that the lock was successful if the machine is about to go
3193          * down/suspend any moment. */
3194         if (m->delayed_action && m->delayed_action->inhibit_what & w)
3195                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
3196                                          "The operation inhibition has been requested for is already running");
3197
3198         r = bus_verify_polkit_async(
3199                         message,
3200                         CAP_SYS_BOOT,
3201                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
3202                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
3203                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
3204                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
3205                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
3206                         w == INHIBIT_HANDLE_REBOOT_KEY    ? "org.freedesktop.login1.inhibit-handle-reboot-key" :
3207                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
3208                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
3209                         NULL,
3210                         false,
3211                         UID_INVALID,
3212                         &m->polkit_registry,
3213                         error);
3214         if (r < 0)
3215                 return r;
3216         if (r == 0)
3217                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3218
3219         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
3220         if (r < 0)
3221                 return r;
3222
3223         r = sd_bus_creds_get_euid(creds, &uid);
3224         if (r < 0)
3225                 return r;
3226
3227         r = sd_bus_creds_get_pid(creds, &pid);
3228         if (r < 0)
3229                 return r;
3230
3231         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
3232                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
3233                                          "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.",
3234                                          m->inhibitors_max);
3235
3236         do {
3237                 id = mfree(id);
3238
3239                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
3240                         return -ENOMEM;
3241
3242         } while (hashmap_get(m->inhibitors, id));
3243
3244         _cleanup_(inhibitor_freep) Inhibitor *i = NULL;
3245         r = manager_add_inhibitor(m, id, &i);
3246         if (r < 0)
3247                 return r;
3248
3249         i->what = w;
3250         i->mode = mm;
3251         i->pid = pid;
3252         i->uid = uid;
3253         i->why = strdup(why);
3254         i->who = strdup(who);
3255
3256         if (!i->why || !i->who)
3257                 return -ENOMEM;
3258
3259         fifo_fd = inhibitor_create_fifo(i);
3260         if (fifo_fd < 0)
3261                 return fifo_fd;
3262
3263         r = inhibitor_start(i);
3264         if (r < 0)
3265                 return r;
3266         TAKE_PTR(i);
3267
3268         return sd_bus_reply_method_return(message, "h", fifo_fd);
3269 }
3270
3271 static const sd_bus_vtable manager_vtable[] = {
3272         SD_BUS_VTABLE_START(0),
3273
3274         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
3275         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
3276
3277         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
3278         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
3279         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
3280         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
3281         SD_BUS_PROPERTY("RebootParameter", "s", property_get_reboot_parameter, 0, 0),
3282         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, 0),
3283         SD_BUS_PROPERTY("RebootToBootLoaderMenu", "t", property_get_reboot_to_boot_loader_menu, 0, 0),
3284         SD_BUS_PROPERTY("RebootToBootLoaderEntry", "s", property_get_reboot_to_boot_loader_entry, 0, 0),
3285         SD_BUS_PROPERTY("BootLoaderEntries", "as", property_get_boot_loader_entries, 0, SD_BUS_VTABLE_PROPERTY_CONST),
3286         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3287         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3288         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3289         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3290         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3291         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
3292         SD_BUS_PROPERTY("UserStopDelayUSec", "t", NULL, offsetof(Manager, user_stop_delay), SD_BUS_VTABLE_PROPERTY_CONST),
3293         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
3294         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
3295         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
3296         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
3297         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
3298         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
3299         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3300         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
3301         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3302         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
3303         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
3304         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
3305         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
3306         SD_BUS_PROPERTY("LidClosed", "b", property_get_lid_closed, 0, 0),
3307         SD_BUS_PROPERTY("OnExternalPower", "b", property_get_on_external_power, 0, 0),
3308         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
3309         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
3310         SD_BUS_PROPERTY("RuntimeDirectoryInodesMax", "t", NULL, offsetof(Manager, runtime_dir_inodes), SD_BUS_VTABLE_PROPERTY_CONST),
3311         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
3312         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
3313         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
3314         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
3315         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
3316
3317         SD_BUS_METHOD_WITH_ARGS("GetSession",
3318                                 SD_BUS_ARGS("s", session_id),
3319                                 SD_BUS_RESULT("o", object_path),
3320                                 method_get_session,
3321                                 SD_BUS_VTABLE_UNPRIVILEGED),
3322         SD_BUS_METHOD_WITH_ARGS("GetSessionByPID",
3323                                 SD_BUS_ARGS("u", pid),
3324                                 SD_BUS_RESULT("o", object_path),
3325                                 method_get_session_by_pid,
3326                                 SD_BUS_VTABLE_UNPRIVILEGED),
3327         SD_BUS_METHOD_WITH_ARGS("GetUser",
3328                                 SD_BUS_ARGS("u", uid),
3329                                 SD_BUS_RESULT("o", object_path),
3330                                 method_get_user,
3331                                 SD_BUS_VTABLE_UNPRIVILEGED),
3332         SD_BUS_METHOD_WITH_ARGS("GetUserByPID",
3333                                 SD_BUS_ARGS("u", pid),
3334                                 SD_BUS_RESULT("o", object_path),
3335                                 method_get_user_by_pid,
3336                                 SD_BUS_VTABLE_UNPRIVILEGED),
3337         SD_BUS_METHOD_WITH_ARGS("GetSeat",
3338                                 SD_BUS_ARGS("s", seat_id),
3339                                 SD_BUS_RESULT("o", object_path),
3340                                 method_get_seat,
3341                                 SD_BUS_VTABLE_UNPRIVILEGED),
3342         SD_BUS_METHOD_WITH_ARGS("ListSessions",
3343                                 SD_BUS_NO_ARGS,
3344                                 SD_BUS_RESULT("a(susso)", sessions),
3345                                 method_list_sessions,
3346                                 SD_BUS_VTABLE_UNPRIVILEGED),
3347         SD_BUS_METHOD_WITH_ARGS("ListUsers",
3348                                 SD_BUS_NO_ARGS,
3349                                 SD_BUS_RESULT("a(uso)", users),
3350                                 method_list_users,
3351                                 SD_BUS_VTABLE_UNPRIVILEGED),
3352         SD_BUS_METHOD_WITH_ARGS("ListSeats",
3353                                 SD_BUS_NO_ARGS,
3354                                 SD_BUS_RESULT("a(so)", seats),
3355                                 method_list_seats,
3356                                 SD_BUS_VTABLE_UNPRIVILEGED),
3357         SD_BUS_METHOD_WITH_ARGS("ListInhibitors",
3358                                 SD_BUS_NO_ARGS,
3359                                 SD_BUS_RESULT("a(ssssuu)", inhibitors),
3360                                 method_list_inhibitors,
3361                                 SD_BUS_VTABLE_UNPRIVILEGED),
3362         SD_BUS_METHOD_WITH_ARGS("CreateSession",
3363                                 SD_BUS_ARGS("u", uid,
3364                                             "u", pid,
3365                                             "s", service,
3366                                             "s", type,
3367                                             "s", class,
3368                                             "s", desktop,
3369                                             "s", seat_id,
3370                                             "u", vtnr,
3371                                             "s", tty,
3372                                             "s", display,
3373                                             "b", remote,
3374                                             "s", remote_user,
3375                                             "s", remote_host,
3376                                             "a(sv)", properties),
3377                                 SD_BUS_RESULT("s", session_id,
3378                                               "o", object_path,
3379                                               "s", runtime_path,
3380                                               "h", fifo_fd,
3381                                               "u", uid,
3382                                               "s", seat_id,
3383                                               "u", vtnr,
3384                                               "b", existing),
3385                                 method_create_session,
3386                                 0),
3387         SD_BUS_METHOD_WITH_ARGS("ReleaseSession",
3388                                 SD_BUS_ARGS("s", session_id),
3389                                 SD_BUS_NO_RESULT,
3390                                 method_release_session,
3391                                 0),
3392         SD_BUS_METHOD_WITH_ARGS("ActivateSession",
3393                                 SD_BUS_ARGS("s", session_id),
3394                                 SD_BUS_NO_RESULT,
3395                                 method_activate_session,
3396                                 SD_BUS_VTABLE_UNPRIVILEGED),
3397         SD_BUS_METHOD_WITH_ARGS("ActivateSessionOnSeat",
3398                                 SD_BUS_ARGS("s", session_id, "s", seat_id),
3399                                 SD_BUS_NO_RESULT,
3400                                 method_activate_session_on_seat,
3401                                 SD_BUS_VTABLE_UNPRIVILEGED),
3402         SD_BUS_METHOD_WITH_ARGS("LockSession",
3403                                 SD_BUS_ARGS("s", session_id),
3404                                 SD_BUS_NO_RESULT,
3405                                 method_lock_session,
3406                                 SD_BUS_VTABLE_UNPRIVILEGED),
3407         SD_BUS_METHOD_WITH_ARGS("UnlockSession",
3408                                 SD_BUS_ARGS("s", session_id),
3409                                 SD_BUS_NO_RESULT,
3410                                 method_lock_session,
3411                                 SD_BUS_VTABLE_UNPRIVILEGED),
3412         SD_BUS_METHOD("LockSessions",
3413                       NULL,
3414                       NULL,
3415                       method_lock_sessions,
3416                       SD_BUS_VTABLE_UNPRIVILEGED),
3417         SD_BUS_METHOD("UnlockSessions",
3418                       NULL,
3419                       NULL,
3420                       method_lock_sessions,
3421                       SD_BUS_VTABLE_UNPRIVILEGED),
3422         SD_BUS_METHOD_WITH_ARGS("KillSession",
3423                                 SD_BUS_ARGS("s", session_id, "s", who, "i", signal_number),
3424                                 SD_BUS_NO_RESULT,
3425                                 method_kill_session,
3426                                 SD_BUS_VTABLE_UNPRIVILEGED),
3427         SD_BUS_METHOD_WITH_ARGS("KillUser",
3428                                 SD_BUS_ARGS("u", uid, "i", signal_number),
3429                                 SD_BUS_NO_RESULT,
3430                                 method_kill_user,
3431                                 SD_BUS_VTABLE_UNPRIVILEGED),
3432         SD_BUS_METHOD_WITH_ARGS("TerminateSession",
3433                                 SD_BUS_ARGS("s", session_id),
3434                                 SD_BUS_NO_RESULT,
3435                                 method_terminate_session,
3436                                 SD_BUS_VTABLE_UNPRIVILEGED),
3437         SD_BUS_METHOD_WITH_ARGS("TerminateUser",
3438                                 SD_BUS_ARGS("u", uid),
3439                                 SD_BUS_NO_RESULT,
3440                                 method_terminate_user,
3441                                 SD_BUS_VTABLE_UNPRIVILEGED),
3442         SD_BUS_METHOD_WITH_ARGS("TerminateSeat",
3443                                 SD_BUS_ARGS("s", seat_id),
3444                                 SD_BUS_NO_RESULT,
3445                                 method_terminate_seat,
3446                                 SD_BUS_VTABLE_UNPRIVILEGED),
3447         SD_BUS_METHOD_WITH_ARGS("SetUserLinger",
3448                                 SD_BUS_ARGS("u", uid, "b", enable, "b", interactive),
3449                                 SD_BUS_NO_RESULT,
3450                                 method_set_user_linger,
3451                                 SD_BUS_VTABLE_UNPRIVILEGED),
3452         SD_BUS_METHOD_WITH_ARGS("AttachDevice",
3453                                 SD_BUS_ARGS("s", seat_id, "s", sysfs_path, "b", interactive),
3454                                 SD_BUS_NO_RESULT,
3455                                 method_attach_device,
3456                                 SD_BUS_VTABLE_UNPRIVILEGED),
3457         SD_BUS_METHOD_WITH_ARGS("FlushDevices",
3458                                 SD_BUS_ARGS("b", interactive),
3459                                 SD_BUS_NO_RESULT,
3460                                 method_flush_devices,
3461                                 SD_BUS_VTABLE_UNPRIVILEGED),
3462         SD_BUS_METHOD_WITH_ARGS("PowerOff",
3463                                 SD_BUS_ARGS("b", interactive),
3464                                 SD_BUS_NO_RESULT,
3465                                 method_poweroff,
3466                                 SD_BUS_VTABLE_UNPRIVILEGED),
3467         SD_BUS_METHOD_WITH_ARGS("PowerOffWithFlags",
3468                                 SD_BUS_ARGS("t", flags),
3469                                 SD_BUS_NO_RESULT,
3470                                 method_poweroff,
3471                                 SD_BUS_VTABLE_UNPRIVILEGED),
3472         SD_BUS_METHOD_WITH_ARGS("Reboot",
3473                                 SD_BUS_ARGS("b", interactive),
3474                                 SD_BUS_NO_RESULT,
3475                                 method_reboot,
3476                                 SD_BUS_VTABLE_UNPRIVILEGED),
3477         SD_BUS_METHOD_WITH_ARGS("RebootWithFlags",
3478                                 SD_BUS_ARGS("t", flags),
3479                                 SD_BUS_NO_RESULT,
3480                                 method_reboot,
3481                                 SD_BUS_VTABLE_UNPRIVILEGED),
3482         SD_BUS_METHOD_WITH_ARGS("Halt",
3483                                 SD_BUS_ARGS("b", interactive),
3484                                 SD_BUS_NO_RESULT,
3485                                 method_halt,
3486                                 SD_BUS_VTABLE_UNPRIVILEGED),
3487         SD_BUS_METHOD_WITH_ARGS("HaltWithFlags",
3488                                 SD_BUS_ARGS("t", flags),
3489                                 SD_BUS_NO_RESULT,
3490                                 method_halt,
3491                                 SD_BUS_VTABLE_UNPRIVILEGED),
3492         SD_BUS_METHOD_WITH_ARGS("Suspend",
3493                                 SD_BUS_ARGS("b", interactive),
3494                                 SD_BUS_NO_RESULT,
3495                                 method_suspend,
3496                                 SD_BUS_VTABLE_UNPRIVILEGED),
3497         SD_BUS_METHOD_WITH_ARGS("SuspendWithFlags",
3498                                 SD_BUS_ARGS("t", flags),
3499                                 SD_BUS_NO_RESULT,
3500                                 method_suspend,
3501                                 SD_BUS_VTABLE_UNPRIVILEGED),
3502         SD_BUS_METHOD_WITH_ARGS("Hibernate",
3503                                 SD_BUS_ARGS("b", interactive),
3504                                 SD_BUS_NO_RESULT,
3505                                 method_hibernate,
3506                                 SD_BUS_VTABLE_UNPRIVILEGED),
3507         SD_BUS_METHOD_WITH_ARGS("HibernateWithFlags",
3508                                 SD_BUS_ARGS("t", flags),
3509                                 SD_BUS_NO_RESULT,
3510                                 method_hibernate,
3511                                 SD_BUS_VTABLE_UNPRIVILEGED),
3512         SD_BUS_METHOD_WITH_ARGS("HybridSleep",
3513                                 SD_BUS_ARGS("b", interactive),
3514                                 SD_BUS_NO_RESULT,
3515                                 method_hybrid_sleep,
3516                                 SD_BUS_VTABLE_UNPRIVILEGED),
3517         SD_BUS_METHOD_WITH_ARGS("HybridSleepWithFlags",
3518                                 SD_BUS_ARGS("t", flags),
3519                                 SD_BUS_NO_RESULT,
3520                                 method_hybrid_sleep,
3521                                 SD_BUS_VTABLE_UNPRIVILEGED),
3522         SD_BUS_METHOD_WITH_ARGS("SuspendThenHibernate",
3523                                 SD_BUS_ARGS("b", interactive),
3524                                 SD_BUS_NO_RESULT,
3525                                 method_suspend_then_hibernate,
3526                                 SD_BUS_VTABLE_UNPRIVILEGED),
3527         SD_BUS_METHOD_WITH_ARGS("SuspendThenHibernateWithFlags",
3528                                 SD_BUS_ARGS("t", flags),
3529                                 SD_BUS_NO_RESULT,
3530                                 method_suspend_then_hibernate,
3531                                 SD_BUS_VTABLE_UNPRIVILEGED),
3532         SD_BUS_METHOD_WITH_ARGS("CanPowerOff",
3533                                 SD_BUS_NO_ARGS,
3534                                 SD_BUS_RESULT("s", result),
3535                                 method_can_poweroff,
3536                                 SD_BUS_VTABLE_UNPRIVILEGED),
3537         SD_BUS_METHOD_WITH_ARGS("CanReboot",
3538                                 SD_BUS_NO_ARGS,
3539                                 SD_BUS_RESULT("s", result),
3540                                 method_can_reboot,
3541                                 SD_BUS_VTABLE_UNPRIVILEGED),
3542         SD_BUS_METHOD_WITH_ARGS("CanHalt",
3543                                 SD_BUS_NO_ARGS,
3544                                 SD_BUS_RESULT("s", result),
3545                                 method_can_halt,
3546                                 SD_BUS_VTABLE_UNPRIVILEGED),
3547         SD_BUS_METHOD_WITH_ARGS("CanSuspend",
3548                                 SD_BUS_NO_ARGS,
3549                                 SD_BUS_RESULT("s", result),
3550                                 method_can_suspend,
3551                                 SD_BUS_VTABLE_UNPRIVILEGED),
3552         SD_BUS_METHOD_WITH_ARGS("CanHibernate",
3553                                 SD_BUS_NO_ARGS,
3554                                 SD_BUS_RESULT("s", result),
3555                                 method_can_hibernate,
3556                                 SD_BUS_VTABLE_UNPRIVILEGED),
3557         SD_BUS_METHOD_WITH_ARGS("CanHybridSleep",
3558                                 SD_BUS_NO_ARGS,
3559                                 SD_BUS_RESULT("s", result),
3560                                 method_can_hybrid_sleep,
3561                                 SD_BUS_VTABLE_UNPRIVILEGED),
3562         SD_BUS_METHOD_WITH_ARGS("CanSuspendThenHibernate",
3563                                 SD_BUS_NO_ARGS,
3564                                 SD_BUS_RESULT("s", result),
3565                                 method_can_suspend_then_hibernate,
3566                                 SD_BUS_VTABLE_UNPRIVILEGED),
3567         SD_BUS_METHOD_WITH_ARGS("ScheduleShutdown",
3568                                 SD_BUS_ARGS("s", type, "t", usec),
3569                                 SD_BUS_NO_RESULT,
3570                                 method_schedule_shutdown,
3571                                 SD_BUS_VTABLE_UNPRIVILEGED),
3572         SD_BUS_METHOD_WITH_ARGS("CancelScheduledShutdown",
3573                                 SD_BUS_NO_ARGS,
3574                                 SD_BUS_RESULT("b", cancelled),
3575                                 method_cancel_scheduled_shutdown,
3576                                 SD_BUS_VTABLE_UNPRIVILEGED),
3577         SD_BUS_METHOD_WITH_ARGS("Inhibit",
3578                                 SD_BUS_ARGS("s", what, "s", who, "s", why, "s", mode),
3579                                 SD_BUS_RESULT("h", pipe_fd),
3580                                 method_inhibit,
3581                                 SD_BUS_VTABLE_UNPRIVILEGED),
3582         SD_BUS_METHOD_WITH_ARGS("CanRebootParameter",
3583                                 SD_BUS_NO_ARGS,
3584                                 SD_BUS_RESULT("s", result),
3585                                 method_can_reboot_parameter,
3586                                 SD_BUS_VTABLE_UNPRIVILEGED),
3587         SD_BUS_METHOD_WITH_ARGS("SetRebootParameter",
3588                                 SD_BUS_ARGS("s", parameter),
3589                                 SD_BUS_NO_RESULT,
3590                                 method_set_reboot_parameter,
3591                                 SD_BUS_VTABLE_UNPRIVILEGED),
3592         SD_BUS_METHOD_WITH_ARGS("CanRebootToFirmwareSetup",
3593                                 SD_BUS_NO_ARGS,
3594                                 SD_BUS_RESULT("s", result),
3595                                 method_can_reboot_to_firmware_setup,
3596                                 SD_BUS_VTABLE_UNPRIVILEGED),
3597         SD_BUS_METHOD_WITH_ARGS("SetRebootToFirmwareSetup",
3598                                 SD_BUS_ARGS("b", enable),
3599                                 SD_BUS_NO_RESULT,
3600                                 method_set_reboot_to_firmware_setup,
3601                                 SD_BUS_VTABLE_UNPRIVILEGED),
3602         SD_BUS_METHOD_WITH_ARGS("CanRebootToBootLoaderMenu",
3603                                 SD_BUS_NO_ARGS,
3604                                 SD_BUS_RESULT("s", result),
3605                                 method_can_reboot_to_boot_loader_menu,
3606                                 SD_BUS_VTABLE_UNPRIVILEGED),
3607         SD_BUS_METHOD_WITH_ARGS("SetRebootToBootLoaderMenu",
3608                                 SD_BUS_ARGS("t", timeout),
3609                                 SD_BUS_NO_RESULT,
3610                                 method_set_reboot_to_boot_loader_menu,
3611                                 SD_BUS_VTABLE_UNPRIVILEGED),
3612         SD_BUS_METHOD_WITH_ARGS("CanRebootToBootLoaderEntry",
3613                                 SD_BUS_NO_ARGS,
3614                                 SD_BUS_RESULT("s", result),
3615                                 method_can_reboot_to_boot_loader_entry,
3616                                 SD_BUS_VTABLE_UNPRIVILEGED),
3617         SD_BUS_METHOD_WITH_ARGS("SetRebootToBootLoaderEntry",
3618                                 SD_BUS_ARGS("s", boot_loader_entry),
3619                                 SD_BUS_NO_RESULT,
3620                                 method_set_reboot_to_boot_loader_entry,
3621                                 SD_BUS_VTABLE_UNPRIVILEGED),
3622         SD_BUS_METHOD_WITH_ARGS("SetWallMessage",
3623                                 SD_BUS_ARGS("s", wall_message, "b", enable),
3624                                 SD_BUS_NO_RESULT,
3625                                 method_set_wall_message,
3626                                 SD_BUS_VTABLE_UNPRIVILEGED),
3627
3628         SD_BUS_SIGNAL_WITH_ARGS("SessionNew",
3629                                 SD_BUS_ARGS("s", session_id, "o", object_path),
3630                                 0),
3631         SD_BUS_SIGNAL_WITH_ARGS("SessionRemoved",
3632                                 SD_BUS_ARGS("s", session_id, "o", object_path),
3633                                 0),
3634         SD_BUS_SIGNAL_WITH_ARGS("UserNew",
3635                                 SD_BUS_ARGS("u", uid, "o", object_path),
3636                                 0),
3637         SD_BUS_SIGNAL_WITH_ARGS("UserRemoved",
3638                                 SD_BUS_ARGS("u", uid, "o", object_path),
3639                                 0),
3640         SD_BUS_SIGNAL_WITH_ARGS("SeatNew",
3641                                 SD_BUS_ARGS("s", seat_id, "o", object_path),
3642                                 0),
3643         SD_BUS_SIGNAL_WITH_ARGS("SeatRemoved",
3644                                 SD_BUS_ARGS("s", seat_id, "o", object_path),
3645                                 0),
3646         SD_BUS_SIGNAL_WITH_ARGS("PrepareForShutdown",
3647                                 SD_BUS_ARGS("b", start),
3648                                 0),
3649         SD_BUS_SIGNAL_WITH_ARGS("PrepareForSleep",
3650                                 SD_BUS_ARGS("b", start),
3651                                 0),
3652
3653         SD_BUS_VTABLE_END
3654 };
3655
3656 const BusObjectImplementation manager_object = {
3657         "/org/freedesktop/login1",
3658         "org.freedesktop.login1.Manager",
3659         .vtables = BUS_VTABLES(manager_vtable),
3660         .children = BUS_IMPLEMENTATIONS(&seat_object,
3661                                         &session_object,
3662                                         &user_object),
3663 };
3664
3665 static int session_jobs_reply(Session *s, uint32_t jid, const char *unit, const char *result) {
3666         assert(s);
3667         assert(unit);
3668
3669         if (!s->started)
3670                 return 0;
3671
3672         if (result && !streq(result, "done")) {
3673                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
3674
3675                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED,
3676                                   "Job %u for unit '%s' failed with '%s'", jid, unit, result);
3677                 return session_send_create_reply(s, &e);
3678         }
3679
3680         return session_send_create_reply(s, NULL);
3681 }
3682
3683 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3684         const char *path, *result, *unit;
3685         Manager *m = userdata;
3686         Session *session;
3687         uint32_t id;
3688         User *user;
3689         int r;
3690
3691         assert(message);
3692         assert(m);
3693
3694         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
3695         if (r < 0) {
3696                 bus_log_parse_error(r);
3697                 return 0;
3698         }
3699
3700         if (m->action_job && streq(m->action_job, path)) {
3701                 assert(m->delayed_action);
3702                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->delayed_action->inhibit_what));
3703
3704                 /* Tell people that they now may take a lock again */
3705                 (void) send_prepare_for(m, m->delayed_action->inhibit_what, false);
3706
3707                 m->action_job = mfree(m->action_job);
3708                 m->delayed_action = NULL;
3709                 return 0;
3710         }
3711
3712         session = hashmap_get(m->session_units, unit);
3713         if (session) {
3714                 if (streq_ptr(path, session->scope_job)) {
3715                         session->scope_job = mfree(session->scope_job);
3716                         (void) session_jobs_reply(session, id, unit, result);
3717
3718                         session_save(session);
3719                         user_save(session->user);
3720                 }
3721
3722                 session_add_to_gc_queue(session);
3723         }
3724
3725         user = hashmap_get(m->user_units, unit);
3726         if (user) {
3727                 if (streq_ptr(path, user->service_job)) {
3728                         user->service_job = mfree(user->service_job);
3729
3730                         LIST_FOREACH(sessions_by_user, session, user->sessions)
3731                                 (void) session_jobs_reply(session, id, unit, NULL /* don't propagate user service failures to the client */);
3732
3733                         user_save(user);
3734                 }
3735
3736                 user_add_to_gc_queue(user);
3737         }
3738
3739         return 0;
3740 }
3741
3742 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3743         const char *path, *unit;
3744         Manager *m = userdata;
3745         Session *session;
3746         User *user;
3747         int r;
3748
3749         assert(message);
3750         assert(m);
3751
3752         r = sd_bus_message_read(message, "so", &unit, &path);
3753         if (r < 0) {
3754                 bus_log_parse_error(r);
3755                 return 0;
3756         }
3757
3758         session = hashmap_get(m->session_units, unit);
3759         if (session)
3760                 session_add_to_gc_queue(session);
3761
3762         user = hashmap_get(m->user_units, unit);
3763         if (user)
3764                 user_add_to_gc_queue(user);
3765
3766         return 0;
3767 }
3768
3769 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3770         _cleanup_free_ char *unit = NULL;
3771         Manager *m = userdata;
3772         const char *path;
3773         Session *session;
3774         User *user;
3775         int r;
3776
3777         assert(message);
3778         assert(m);
3779
3780         path = sd_bus_message_get_path(message);
3781         if (!path)
3782                 return 0;
3783
3784         r = unit_name_from_dbus_path(path, &unit);
3785         if (r == -EINVAL) /* not a unit */
3786                 return 0;
3787         if (r < 0) {
3788                 log_oom();
3789                 return 0;
3790         }
3791
3792         session = hashmap_get(m->session_units, unit);
3793         if (session)
3794                 session_add_to_gc_queue(session);
3795
3796         user = hashmap_get(m->user_units, unit);
3797         if (user)
3798                 user_add_to_gc_queue(user);
3799
3800         return 0;
3801 }
3802
3803 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3804         Manager *m = userdata;
3805         Session *session;
3806         int b, r;
3807
3808         assert(message);
3809         assert(m);
3810
3811         r = sd_bus_message_read(message, "b", &b);
3812         if (r < 0) {
3813                 bus_log_parse_error(r);
3814                 return 0;
3815         }
3816
3817         if (b)
3818                 return 0;
3819
3820         /* systemd finished reloading, let's recheck all our sessions */
3821         log_debug("System manager has been reloaded, rechecking sessions...");
3822
3823         HASHMAP_FOREACH(session, m->sessions)
3824                 session_add_to_gc_queue(session);
3825
3826         return 0;
3827 }
3828
3829 int manager_send_changed(Manager *manager, const char *property, ...) {
3830         char **l;
3831
3832         assert(manager);
3833
3834         l = strv_from_stdarg_alloca(property);
3835
3836         return sd_bus_emit_properties_changed_strv(
3837                         manager->bus,
3838                         "/org/freedesktop/login1",
3839                         "org.freedesktop.login1.Manager",
3840                         l);
3841 }
3842
3843 static int strdup_job(sd_bus_message *reply, char **job) {
3844         const char *j;
3845         char *copy;
3846         int r;
3847
3848         r = sd_bus_message_read(reply, "o", &j);
3849         if (r < 0)
3850                 return r;
3851
3852         copy = strdup(j);
3853         if (!copy)
3854                 return -ENOMEM;
3855
3856         *job = copy;
3857         return 1;
3858 }
3859
3860 int manager_start_scope(
3861                 Manager *manager,
3862                 const char *scope,
3863                 pid_t pid,
3864                 const char *slice,
3865                 const char *description,
3866                 char **wants,
3867                 char **after,
3868                 const char *requires_mounts_for,
3869                 sd_bus_message *more_properties,
3870                 sd_bus_error *error,
3871                 char **job) {
3872
3873         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3874         char **i;
3875         int r;
3876
3877         assert(manager);
3878         assert(scope);
3879         assert(pid > 1);
3880         assert(job);
3881
3882         r = bus_message_new_method_call(manager->bus, &m, bus_systemd_mgr, "StartTransientUnit");
3883         if (r < 0)
3884                 return r;
3885
3886         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3887         if (r < 0)
3888                 return r;
3889
3890         r = sd_bus_message_open_container(m, 'a', "(sv)");
3891         if (r < 0)
3892                 return r;
3893
3894         if (!isempty(slice)) {
3895                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3896                 if (r < 0)
3897                         return r;
3898         }
3899
3900         if (!isempty(description)) {
3901                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3902                 if (r < 0)
3903                         return r;
3904         }
3905
3906         STRV_FOREACH(i, wants) {
3907                 r = sd_bus_message_append(m, "(sv)", "Wants", "as", 1, *i);
3908                 if (r < 0)
3909                         return r;
3910         }
3911
3912         STRV_FOREACH(i, after) {
3913                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, *i);
3914                 if (r < 0)
3915                         return r;
3916         }
3917
3918         if (!empty_or_root(requires_mounts_for)) {
3919                 r = sd_bus_message_append(m, "(sv)", "RequiresMountsFor", "as", 1, requires_mounts_for);
3920                 if (r < 0)
3921                         return r;
3922         }
3923
3924         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
3925          * SIGTERM */
3926         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3927         if (r < 0)
3928                 return r;
3929
3930         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3931         if (r < 0)
3932                 return r;
3933
3934         /* disable TasksMax= for the session scope, rely on the slice setting for it */
3935         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", UINT64_MAX);
3936         if (r < 0)
3937                 return bus_log_create_error(r);
3938
3939         if (more_properties) {
3940                 /* If TasksMax also appears here, it will overwrite the default value set above */
3941                 r = sd_bus_message_copy(m, more_properties, true);
3942                 if (r < 0)
3943                         return r;
3944         }
3945
3946         r = sd_bus_message_close_container(m);
3947         if (r < 0)
3948                 return r;
3949
3950         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3951         if (r < 0)
3952                 return r;
3953
3954         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3955         if (r < 0)
3956                 return r;
3957
3958         return strdup_job(reply, job);
3959 }
3960
3961 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3962         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3963         int r;
3964
3965         assert(manager);
3966         assert(unit);
3967         assert(job);
3968
3969         r = bus_call_method(
3970                         manager->bus,
3971                         bus_systemd_mgr,
3972                         "StartUnit",
3973                         error,
3974                         &reply,
3975                         "ss", unit, "replace");
3976         if (r < 0)
3977                 return r;
3978
3979         return strdup_job(reply, job);
3980 }
3981
3982 int manager_stop_unit(Manager *manager, const char *unit, const char *job_mode, sd_bus_error *error, char **ret_job) {
3983         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3984         int r;
3985
3986         assert(manager);
3987         assert(unit);
3988         assert(ret_job);
3989
3990         r = bus_call_method(
3991                         manager->bus,
3992                         bus_systemd_mgr,
3993                         "StopUnit",
3994                         error,
3995                         &reply,
3996                         "ss", unit, job_mode ?: "fail");
3997         if (r < 0) {
3998                 if (sd_bus_error_has_names(error, BUS_ERROR_NO_SUCH_UNIT,
3999                                                   BUS_ERROR_LOAD_FAILED)) {
4000
4001                         *ret_job = NULL;
4002                         sd_bus_error_free(error);
4003                         return 0;
4004                 }
4005
4006                 return r;
4007         }
4008
4009         return strdup_job(reply, ret_job);
4010 }
4011
4012 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *ret_error) {
4013         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4014         _cleanup_free_ char *path = NULL;
4015         int r;
4016
4017         assert(manager);
4018         assert(scope);
4019
4020         path = unit_dbus_path_from_name(scope);
4021         if (!path)
4022                 return -ENOMEM;
4023
4024         r = sd_bus_call_method(
4025                         manager->bus,
4026                         "org.freedesktop.systemd1",
4027                         path,
4028                         "org.freedesktop.systemd1.Scope",
4029                         "Abandon",
4030                         &error,
4031                         NULL,
4032                         NULL);
4033         if (r < 0) {
4034                 if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT,
4035                                                    BUS_ERROR_LOAD_FAILED,
4036                                                    BUS_ERROR_SCOPE_NOT_RUNNING))
4037                         return 0;
4038
4039                 sd_bus_error_move(ret_error, &error);
4040                 return r;
4041         }
4042
4043         return 1;
4044 }
4045
4046 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
4047         assert(manager);
4048         assert(unit);
4049
4050         return bus_call_method(
4051                         manager->bus,
4052                         bus_systemd_mgr,
4053                         "KillUnit",
4054                         error,
4055                         NULL,
4056                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
4057 }
4058
4059 int manager_unit_is_active(Manager *manager, const char *unit, sd_bus_error *ret_error) {
4060         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4061         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4062         _cleanup_free_ char *path = NULL;
4063         const char *state;
4064         int r;
4065
4066         assert(manager);
4067         assert(unit);
4068
4069         path = unit_dbus_path_from_name(unit);
4070         if (!path)
4071                 return -ENOMEM;
4072
4073         r = sd_bus_get_property(
4074                         manager->bus,
4075                         "org.freedesktop.systemd1",
4076                         path,
4077                         "org.freedesktop.systemd1.Unit",
4078                         "ActiveState",
4079                         &error,
4080                         &reply,
4081                         "s");
4082         if (r < 0) {
4083                 /* systemd might have dropped off momentarily, let's
4084                  * not make this an error */
4085                 if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY,
4086                                                    SD_BUS_ERROR_DISCONNECTED))
4087                         return true;
4088
4089                 /* If the unit is already unloaded then it's not
4090                  * active */
4091                 if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT,
4092                                                    BUS_ERROR_LOAD_FAILED))
4093                         return false;
4094
4095                 sd_bus_error_move(ret_error, &error);
4096                 return r;
4097         }
4098
4099         r = sd_bus_message_read(reply, "s", &state);
4100         if (r < 0)
4101                 return r;
4102
4103         return !STR_IN_SET(state, "inactive", "failed");
4104 }
4105
4106 int manager_job_is_active(Manager *manager, const char *path, sd_bus_error *ret_error) {
4107         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4108         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4109         int r;
4110
4111         assert(manager);
4112         assert(path);
4113
4114         r = sd_bus_get_property(
4115                         manager->bus,
4116                         "org.freedesktop.systemd1",
4117                         path,
4118                         "org.freedesktop.systemd1.Job",
4119                         "State",
4120                         &error,
4121                         &reply,
4122                         "s");
4123         if (r < 0) {
4124                 if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY,
4125                                                    SD_BUS_ERROR_DISCONNECTED))
4126                         return true;
4127
4128                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
4129                         return false;
4130
4131                 sd_bus_error_move(ret_error, &error);
4132                 return r;
4133         }
4134
4135         /* We don't actually care about the state really. The fact
4136          * that we could read the job state is enough for us */
4137
4138         return true;
4139 }