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-api.h"
  24 #include "efi-loader.h"
  25 #include "efivars.h"
  26 #include "env-file.h"
  27 #include "env-util.h"
  28 #include "escape.h"
  29 #include "event-util.h"
  30 #include "fd-util.h"
  31 #include "fileio-label.h"
  32 #include "fileio.h"
  33 #include "format-util.h"
  34 #include "fs-util.h"
  35 #include "logind-action.h"
  36 #include "logind-dbus.h"
  37 #include "logind-polkit.h"
  38 #include "logind-seat-dbus.h"
  39 #include "logind-session-dbus.h"
  40 #include "logind-user-dbus.h"
  41 #include "logind.h"
  42 #include "missing_capability.h"
  43 #include "mkdir-label.h"
  44 #include "parse-util.h"
  45 #include "path-util.h"
  46 #include "process-util.h"
  47 #include "reboot-util.h"
  48 #include "selinux-util.h"
  49 #include "sleep-config.h"
  50 #include "special.h"
  51 #include "serialize.h"
  52 #include "signal-util.h"
  53 #include "stdio-util.h"
  54 #include "strv.h"
  55 #include "terminal-util.h"
  56 #include "tmpfile-util.h"
  57 #include "unit-name.h"
  58 #include "user-util.h"
  59 #include "utmp-wtmp.h"
  60 #include "virt.h"
  61 #include "wall.h"
  62
  63 /* As a random fun fact sysvinit had a 252 (256-(strlen(" \r\n")+1))
  64  * character limit for the wall message.
  65  * https://git.savannah.nongnu.org/cgit/sysvinit.git/tree/src/shutdown.c#n72
  66  * There is no real technical need for that but doesn't make sense
  67  * to store arbitrary amounts either. As we are not stingy here, we
  68  * allow 4k.
  69  */
  70 #define WALL_MESSAGE_MAX 4096U
  71
  72 #define SHUTDOWN_SCHEDULE_FILE "/run/systemd/shutdown/scheduled"
  73
  74 static void reset_scheduled_shutdown(Manager *m);
  75
  76 static int get_sender_session(
  77                 Manager *m,
  78                 sd_bus_message *message,
  79                 bool consult_display,
  80                 sd_bus_error *error,
  81                 Session **ret) {
  82
  83         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  84         Session *session = NULL;
  85         const char *name;
  86         int r;
  87
  88         /* Acquire the sender's session. This first checks if the sending process is inside a session itself,
  89          * and returns that. If not and 'consult_display' is true, this returns the display session of the
  90          * owning user of the caller. */
  91
  92         r = sd_bus_query_sender_creds(message,
  93                                       SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT|
  94                                       (consult_display ? SD_BUS_CREDS_OWNER_UID : 0), &creds);
  95         if (r < 0)
  96                 return r;
  97
  98         r = sd_bus_creds_get_session(creds, &name);
  99         if (r < 0) {
 100                 if (r != -ENXIO)
 101                         return r;
 102
 103                 if (consult_display) {
 104                         uid_t uid;
 105
 106                         r = sd_bus_creds_get_owner_uid(creds, &uid);
 107                         if (r < 0) {
 108                                 if (r != -ENXIO)
 109                                         return r;
 110                         } else {
 111                                 User *user;
 112
 113                                 user = hashmap_get(m->users, UID_TO_PTR(uid));
 114                                 if (user)
 115                                         session = user->display;
 116                         }
 117                 }
 118         } else
 119                 session = hashmap_get(m->sessions, name);
 120
 121         if (!session)
 122                 return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
 123                                          consult_display ?
 124                                          "Caller does not belong to any known session and doesn't own any suitable session." :
 125                                          "Caller does not belong to any known session.");
 126
 127         *ret = session;
 128         return 0;
 129 }
 130
 131 int manager_get_session_from_creds(
 132                 Manager *m,
 133                 sd_bus_message *message,
 134                 const char *name,
 135                 sd_bus_error *error,
 136                 Session **ret) {
 137
 138         Session *session;
 139
 140         assert(m);
 141         assert(ret);
 142
 143         if (SESSION_IS_SELF(name)) /* the caller's own session */
 144                 return get_sender_session(m, message, false, error, ret);
 145         if (SESSION_IS_AUTO(name)) /* The caller's own session if they have one, otherwise their user's display session */
 146                 return get_sender_session(m, message, true, error, ret);
 147
 148         session = hashmap_get(m->sessions, name);
 149         if (!session)
 150                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
 151
 152         *ret = session;
 153         return 0;
 154 }
 155
 156 static int get_sender_user(Manager *m, sd_bus_message *message, sd_bus_error *error, User **ret) {
 157         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 158         uid_t uid;
 159         User *user;
 160         int r;
 161
 162         /* Note that we get the owner UID of the session, not the actual client UID here! */
 163         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 164         if (r < 0)
 165                 return r;
 166
 167         r = sd_bus_creds_get_owner_uid(creds, &uid);
 168         if (r < 0) {
 169                 if (r != -ENXIO)
 170                         return r;
 171
 172                 user = NULL;
 173         } else
 174                 user = hashmap_get(m->users, UID_TO_PTR(uid));
 175
 176         if (!user)
 177                 return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 178                                          "Caller does not belong to any logged in or lingering user");
 179
 180         *ret = user;
 181         return 0;
 182 }
 183
 184 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
 185         User *user;
 186
 187         assert(m);
 188         assert(ret);
 189
 190         if (!uid_is_valid(uid))
 191                 return get_sender_user(m, message, error, ret);
 192
 193         user = hashmap_get(m->users, UID_TO_PTR(uid));
 194         if (!user)
 195                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER,
 196                                          "User ID "UID_FMT" is not logged in or lingering", uid);
 197
 198         *ret = user;
 199         return 0;
 200 }
 201
 202 int manager_get_seat_from_creds(
 203                 Manager *m,
 204                 sd_bus_message *message,
 205                 const char *name,
 206                 sd_bus_error *error,
 207                 Seat **ret) {
 208
 209         Seat *seat;
 210         int r;
 211
 212         assert(m);
 213         assert(ret);
 214
 215         if (SEAT_IS_SELF(name) || SEAT_IS_AUTO(name)) {
 216                 Session *session;
 217
 218                 /* Use these special seat names as session names */
 219                 r = manager_get_session_from_creds(m, message, name, error, &session);
 220                 if (r < 0)
 221                         return r;
 222
 223                 seat = session->seat;
 224                 if (!seat)
 225                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session '%s' has no seat.", session->id);
 226         } else {
 227                 seat = hashmap_get(m->seats, name);
 228                 if (!seat)
 229                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 230         }
 231
 232         *ret = seat;
 233         return 0;
 234 }
 235
 236 static int return_test_polkit(
 237                 sd_bus_message *message,
 238                 const char *action,
 239                 const char **details,
 240                 uid_t good_user,
 241                 sd_bus_error *e) {
 242
 243         const char *result;
 244         bool challenge;
 245         int r;
 246
 247         r = bus_test_polkit(message, action, details, good_user, &challenge, e);
 248         if (r < 0)
 249                 return r;
 250
 251         if (r > 0)
 252                 result = "yes";
 253         else if (challenge)
 254                 result = "challenge";
 255         else
 256                 result = "no";
 257
 258         return sd_bus_reply_method_return(message, "s", result);
 259 }
 260
 261 static int property_get_idle_hint(
 262                 sd_bus *bus,
 263                 const char *path,
 264                 const char *interface,
 265                 const char *property,
 266                 sd_bus_message *reply,
 267                 void *userdata,
 268                 sd_bus_error *error) {
 269
 270         Manager *m = ASSERT_PTR(userdata);
 271
 272         assert(bus);
 273         assert(reply);
 274
 275         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 276 }
 277
 278 static int property_get_idle_since_hint(
 279                 sd_bus *bus,
 280                 const char *path,
 281                 const char *interface,
 282                 const char *property,
 283                 sd_bus_message *reply,
 284                 void *userdata,
 285                 sd_bus_error *error) {
 286
 287         Manager *m = ASSERT_PTR(userdata);
 288         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 289
 290         assert(bus);
 291         assert(reply);
 292
 293         manager_get_idle_hint(m, &t);
 294
 295         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 296 }
 297
 298 static int property_get_inhibited(
 299                 sd_bus *bus,
 300                 const char *path,
 301                 const char *interface,
 302                 const char *property,
 303                 sd_bus_message *reply,
 304                 void *userdata,
 305                 sd_bus_error *error) {
 306
 307         Manager *m = ASSERT_PTR(userdata);
 308         InhibitWhat w;
 309
 310         assert(bus);
 311         assert(reply);
 312
 313         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 314
 315         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 316 }
 317
 318 static int property_get_preparing(
 319                 sd_bus *bus,
 320                 const char *path,
 321                 const char *interface,
 322                 const char *property,
 323                 sd_bus_message *reply,
 324                 void *userdata,
 325                 sd_bus_error *error) {
 326
 327         Manager *m = ASSERT_PTR(userdata);
 328         bool b = false;
 329
 330         assert(bus);
 331         assert(reply);
 332
 333         if (m->delayed_action) {
 334                 if (streq(property, "PreparingForShutdown"))
 335                         b = m->delayed_action->inhibit_what & INHIBIT_SHUTDOWN;
 336                 else
 337                         b = m->delayed_action->inhibit_what & INHIBIT_SLEEP;
 338         }
 339
 340         return sd_bus_message_append(reply, "b", b);
 341 }
 342
 343 static int property_get_sleep_operations(
 344                 sd_bus *bus,
 345                 const char *path,
 346                 const char *interface,
 347                 const char *property,
 348                 sd_bus_message *reply,
 349                 void *userdata,
 350                 sd_bus_error *error) {
 351
 352         Manager *m = ASSERT_PTR(userdata);
 353         _cleanup_strv_free_ char **actions = NULL;
 354         int r;
 355
 356         assert(bus);
 357         assert(reply);
 358
 359         r = handle_action_get_enabled_sleep_actions(m->handle_action_sleep_mask, &actions);
 360         if (r < 0)
 361                 return r;
 362
 363         return sd_bus_message_append_strv(reply, actions);
 364 }
 365
 366 static int property_get_scheduled_shutdown(
 367                 sd_bus *bus,
 368                 const char *path,
 369                 const char *interface,
 370                 const char *property,
 371                 sd_bus_message *reply,
 372                 void *userdata,
 373                 sd_bus_error *error) {
 374
 375         Manager *m = ASSERT_PTR(userdata);
 376         int r;
 377
 378         assert(bus);
 379         assert(reply);
 380
 381         r = sd_bus_message_open_container(reply, 'r', "st");
 382         if (r < 0)
 383                 return r;
 384
 385         r = sd_bus_message_append(
 386                         reply, "st",
 387                         handle_action_to_string(m->scheduled_shutdown_action),
 388                         m->scheduled_shutdown_timeout);
 389         if (r < 0)
 390                 return r;
 391
 392         return sd_bus_message_close_container(reply);
 393 }
 394
 395 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 396 static BUS_DEFINE_PROPERTY_GET(property_get_docked, "b", Manager, manager_is_docked_or_external_displays);
 397 static BUS_DEFINE_PROPERTY_GET(property_get_lid_closed, "b", Manager, manager_is_lid_closed);
 398 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_on_external_power, "b", manager_is_on_external_power());
 399 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_compat_user_tasks_max, "t", CGROUP_LIMIT_MAX);
 400 static BUS_DEFINE_PROPERTY_GET_REF(property_get_hashmap_size, "t", Hashmap *, (uint64_t) hashmap_size);
 401
 402 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 403         _cleanup_free_ char *p = NULL;
 404         Manager *m = ASSERT_PTR(userdata);
 405         const char *name;
 406         Session *session;
 407         int r;
 408
 409         assert(message);
 410
 411         r = sd_bus_message_read(message, "s", &name);
 412         if (r < 0)
 413                 return r;
 414
 415         r = manager_get_session_from_creds(m, message, name, error, &session);
 416         if (r < 0)
 417                 return r;
 418
 419         p = session_bus_path(session);
 420         if (!p)
 421                 return -ENOMEM;
 422
 423         return sd_bus_reply_method_return(message, "o", p);
 424 }
 425
 426 /* Get login session of a process.  This is not what you are looking for these days,
 427  * as apps may instead belong to a user service unit.  This includes terminal
 428  * emulators and hence command-line apps. */
 429 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 430         Manager *m = ASSERT_PTR(userdata);
 431         _cleanup_free_ char *p = NULL;
 432         Session *session = NULL;
 433         pid_t pid;
 434         int r;
 435
 436         assert(message);
 437
 438         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 439
 440         r = sd_bus_message_read(message, "u", &pid);
 441         if (r < 0)
 442                 return r;
 443         if (pid < 0)
 444                 return -EINVAL;
 445
 446         if (pid == 0) {
 447                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 448                 if (r < 0)
 449                         return r;
 450         } else {
 451                 r = manager_get_session_by_pidref(m, &PIDREF_MAKE_FROM_PID(pid), &session);
 452                 if (r < 0)
 453                         return r;
 454
 455                 if (!session)
 456                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
 457                                                  "PID "PID_FMT" does not belong to any known session", pid);
 458         }
 459
 460         p = session_bus_path(session);
 461         if (!p)
 462                 return -ENOMEM;
 463
 464         return sd_bus_reply_method_return(message, "o", p);
 465 }
 466
 467 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 468         _cleanup_free_ char *p = NULL;
 469         Manager *m = ASSERT_PTR(userdata);
 470         uint32_t uid;
 471         User *user;
 472         int r;
 473
 474         assert(message);
 475
 476         r = sd_bus_message_read(message, "u", &uid);
 477         if (r < 0)
 478                 return r;
 479
 480         r = manager_get_user_from_creds(m, message, uid, error, &user);
 481         if (r < 0)
 482                 return r;
 483
 484         p = user_bus_path(user);
 485         if (!p)
 486                 return -ENOMEM;
 487
 488         return sd_bus_reply_method_return(message, "o", p);
 489 }
 490
 491 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 492         _cleanup_free_ char *p = NULL;
 493         Manager *m = ASSERT_PTR(userdata);
 494         User *user = NULL;
 495         pid_t pid;
 496         int r;
 497
 498         assert(message);
 499
 500         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 501
 502         r = sd_bus_message_read(message, "u", &pid);
 503         if (r < 0)
 504                 return r;
 505         if (pid < 0)
 506                 return -EINVAL;
 507
 508         if (pid == 0) {
 509                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 510                 if (r < 0)
 511                         return r;
 512         } else {
 513                 r = manager_get_user_by_pid(m, pid, &user);
 514                 if (r < 0)
 515                         return r;
 516                 if (!user)
 517                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 518                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 519                                                  pid);
 520         }
 521
 522         p = user_bus_path(user);
 523         if (!p)
 524                 return -ENOMEM;
 525
 526         return sd_bus_reply_method_return(message, "o", p);
 527 }
 528
 529 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 530         _cleanup_free_ char *p = NULL;
 531         Manager *m = ASSERT_PTR(userdata);
 532         const char *name;
 533         Seat *seat;
 534         int r;
 535
 536         assert(message);
 537
 538         r = sd_bus_message_read(message, "s", &name);
 539         if (r < 0)
 540                 return r;
 541
 542         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 543         if (r < 0)
 544                 return r;
 545
 546         p = seat_bus_path(seat);
 547         if (!p)
 548                 return -ENOMEM;
 549
 550         return sd_bus_reply_method_return(message, "o", p);
 551 }
 552
 553 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 554         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 555         Manager *m = ASSERT_PTR(userdata);
 556         Session *session;
 557         int r;
 558
 559         assert(message);
 560
 561         r = sd_bus_message_new_method_return(message, &reply);
 562         if (r < 0)
 563                 return r;
 564
 565         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 566         if (r < 0)
 567                 return r;
 568
 569         HASHMAP_FOREACH(session, m->sessions) {
 570                 _cleanup_free_ char *p = NULL;
 571
 572                 p = session_bus_path(session);
 573                 if (!p)
 574                         return -ENOMEM;
 575
 576                 r = sd_bus_message_append(reply, "(susso)",
 577                                           session->id,
 578                                           (uint32_t) session->user->user_record->uid,
 579                                           session->user->user_record->user_name,
 580                                           session->seat ? session->seat->id : "",
 581                                           p);
 582                 if (r < 0)
 583                         return r;
 584         }
 585
 586         r = sd_bus_message_close_container(reply);
 587         if (r < 0)
 588                 return r;
 589
 590         return sd_bus_send(NULL, reply, NULL);
 591 }
 592
 593 static int method_list_sessions_ex(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 594         Manager *m = ASSERT_PTR(userdata);
 595         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 596         int r;
 597
 598         assert(message);
 599
 600         r = sd_bus_message_new_method_return(message, &reply);
 601         if (r < 0)
 602                 return r;
 603
 604         r = sd_bus_message_open_container(reply, 'a', "(sussussbto)");
 605         if (r < 0)
 606                 return r;
 607
 608         Session *s;
 609         HASHMAP_FOREACH(s, m->sessions) {
 610                 _cleanup_free_ char *path = NULL;
 611                 dual_timestamp idle_ts;
 612                 bool idle;
 613
 614                 assert(s->user);
 615
 616                 path = session_bus_path(s);
 617                 if (!path)
 618                         return -ENOMEM;
 619
 620                 r = session_get_idle_hint(s, &idle_ts);
 621                 if (r < 0)
 622                         return r;
 623                 idle = r > 0;
 624
 625                 r = sd_bus_message_append(reply, "(sussussbto)",
 626                                           s->id,
 627                                           (uint32_t) s->user->user_record->uid,
 628                                           s->user->user_record->user_name,
 629                                           s->seat ? s->seat->id : "",
 630                                           (uint32_t) s->leader.pid,
 631                                           session_class_to_string(s->class),
 632                                           s->tty,
 633                                           idle,
 634                                           idle_ts.monotonic,
 635                                           path);
 636                 if (r < 0)
 637                         return r;
 638         }
 639
 640         r = sd_bus_message_close_container(reply);
 641         if (r < 0)
 642                 return r;
 643
 644         return sd_bus_send(NULL, reply, NULL);
 645 }
 646
 647 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 648         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 649         Manager *m = ASSERT_PTR(userdata);
 650         User *user;
 651         int r;
 652
 653         assert(message);
 654
 655         r = sd_bus_message_new_method_return(message, &reply);
 656         if (r < 0)
 657                 return r;
 658
 659         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 660         if (r < 0)
 661                 return r;
 662
 663         HASHMAP_FOREACH(user, m->users) {
 664                 _cleanup_free_ char *p = NULL;
 665
 666                 p = user_bus_path(user);
 667                 if (!p)
 668                         return -ENOMEM;
 669
 670                 r = sd_bus_message_append(reply, "(uso)",
 671                                           (uint32_t) user->user_record->uid,
 672                                           user->user_record->user_name,
 673                                           p);
 674                 if (r < 0)
 675                         return r;
 676         }
 677
 678         r = sd_bus_message_close_container(reply);
 679         if (r < 0)
 680                 return r;
 681
 682         return sd_bus_send(NULL, reply, NULL);
 683 }
 684
 685 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 686         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 687         Manager *m = ASSERT_PTR(userdata);
 688         Seat *seat;
 689         int r;
 690
 691         assert(message);
 692
 693         r = sd_bus_message_new_method_return(message, &reply);
 694         if (r < 0)
 695                 return r;
 696
 697         r = sd_bus_message_open_container(reply, 'a', "(so)");
 698         if (r < 0)
 699                 return r;
 700
 701         HASHMAP_FOREACH(seat, m->seats) {
 702                 _cleanup_free_ char *p = NULL;
 703
 704                 p = seat_bus_path(seat);
 705                 if (!p)
 706                         return -ENOMEM;
 707
 708                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 709                 if (r < 0)
 710                         return r;
 711         }
 712
 713         r = sd_bus_message_close_container(reply);
 714         if (r < 0)
 715                 return r;
 716
 717         return sd_bus_send(NULL, reply, NULL);
 718 }
 719
 720 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 721         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 722         Manager *m = ASSERT_PTR(userdata);
 723         Inhibitor *inhibitor;
 724         int r;
 725
 726         assert(message);
 727
 728         r = sd_bus_message_new_method_return(message, &reply);
 729         if (r < 0)
 730                 return r;
 731
 732         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 733         if (r < 0)
 734                 return r;
 735
 736         HASHMAP_FOREACH(inhibitor, m->inhibitors) {
 737
 738                 r = sd_bus_message_append(reply, "(ssssuu)",
 739                                           strempty(inhibit_what_to_string(inhibitor->what)),
 740                                           strempty(inhibitor->who),
 741                                           strempty(inhibitor->why),
 742                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 743                                           (uint32_t) inhibitor->uid,
 744                                           (uint32_t) inhibitor->pid.pid);
 745                 if (r < 0)
 746                         return r;
 747         }
 748
 749         r = sd_bus_message_close_container(reply);
 750         if (r < 0)
 751                 return r;
 752
 753         return sd_bus_send(NULL, reply, NULL);
 754 }
 755
 756 static int create_session(
 757                 sd_bus_message *message,
 758                 void *userdata,
 759                 sd_bus_error *error,
 760                 uid_t uid,
 761                 pid_t leader_pid,
 762                 int leader_pidfd,
 763                 const char *service,
 764                 const char *type,
 765                 const char *class,
 766                 const char *desktop,
 767                 const char *cseat,
 768                 uint32_t vtnr,
 769                 const char *tty,
 770                 const char *display,
 771                 int remote,
 772                 const char *remote_user,
 773                 const char *remote_host,
 774                 uint64_t flags) {
 775
 776         _cleanup_(pidref_done) PidRef leader = PIDREF_NULL;
 777         Manager *m = ASSERT_PTR(userdata);
 778         _cleanup_free_ char *id = NULL;
 779         Session *session = NULL;
 780         uint32_t audit_id = 0;
 781         User *user = NULL;
 782         Seat *seat = NULL;
 783         SessionType t;
 784         SessionClass c;
 785         int r;
 786
 787         assert(message);
 788
 789         if (!uid_is_valid(uid))
 790                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 791
 792         if (flags != 0)
 793                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Flags must be zero.");
 794
 795         if (leader_pidfd >= 0)
 796                 r = pidref_set_pidfd(&leader, leader_pidfd);
 797         else if (leader_pid == 0)
 798                 r = bus_query_sender_pidref(message, &leader);
 799         else {
 800                 if (leader_pid < 0)
 801                         return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Leader PID is not valid");
 802
 803                 r = pidref_set_pid(&leader, leader_pid);
 804         }
 805         if (r < 0)
 806                 return r;
 807
 808         if (leader.pid == 1 || leader.pid == getpid_cached())
 809                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 810
 811         if (isempty(type))
 812                 t = _SESSION_TYPE_INVALID;
 813         else {
 814                 t = session_type_from_string(type);
 815                 if (t < 0)
 816                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 817                                                  "Invalid session type %s", type);
 818         }
 819
 820         if (isempty(class))
 821                 c = _SESSION_CLASS_INVALID;
 822         else {
 823                 c = session_class_from_string(class);
 824                 if (c < 0)
 825                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 826                                                  "Invalid session class %s", class);
 827         }
 828
 829         if (isempty(desktop))
 830                 desktop = NULL;
 831         else {
 832                 if (!string_is_safe(desktop))
 833                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 834                                                  "Invalid desktop string %s", desktop);
 835         }
 836
 837         if (isempty(cseat))
 838                 seat = NULL;
 839         else {
 840                 seat = hashmap_get(m->seats, cseat);
 841                 if (!seat)
 842                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT,
 843                                                  "No seat '%s' known", cseat);
 844         }
 845
 846         if (tty_is_vc(tty)) {
 847                 int v;
 848
 849                 if (!seat)
 850                         seat = m->seat0;
 851                 else if (seat != m->seat0)
 852                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 853                                                  "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 854
 855                 v = vtnr_from_tty(tty);
 856                 if (v <= 0)
 857                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 858                                                  "Cannot determine VT number from virtual console TTY %s", tty);
 859
 860                 if (vtnr == 0)
 861                         vtnr = (uint32_t) v;
 862                 else if (vtnr != (uint32_t) v)
 863                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 864                                                  "Specified TTY and VT number do not match");
 865
 866         } else if (tty_is_console(tty)) {
 867
 868                 if (!seat)
 869                         seat = m->seat0;
 870                 else if (seat != m->seat0)
 871                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 872                                                  "Console TTY specified but seat is not seat0");
 873
 874                 if (vtnr != 0)
 875                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 876                                                  "Console TTY specified but VT number is not 0");
 877         }
 878
 879         if (seat) {
 880                 if (seat_has_vts(seat)) {
 881                         if (vtnr <= 0 || vtnr > 63)
 882                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 883                                                          "VT number out of range");
 884                 } else {
 885                         if (vtnr != 0)
 886                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 887                                                          "Seat has no VTs but VT number not 0");
 888                 }
 889         }
 890
 891         if (t == _SESSION_TYPE_INVALID) {
 892                 if (!isempty(display))
 893                         t = SESSION_X11;
 894                 else if (!isempty(tty))
 895                         t = SESSION_TTY;
 896                 else
 897                         t = SESSION_UNSPECIFIED;
 898         }
 899
 900         if (c == _SESSION_CLASS_INVALID) {
 901                 if (t == SESSION_UNSPECIFIED)
 902                         c = SESSION_BACKGROUND;
 903                 else
 904                         c = SESSION_USER;
 905         }
 906
 907         /* Check if we are already in a logind session, and if so refuse. */
 908         r = manager_get_session_by_pidref(m, &leader, /* ret_session= */ NULL);
 909         if (r < 0)
 910                 return r;
 911         if (r > 0)
 912                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY,
 913                                          "Already running in a session or user slice");
 914
 915         /* Old gdm and lightdm start the user-session on the same VT as the greeter session. But they destroy
 916          * the greeter session after the user-session and want the user-session to take over the VT. We need
 917          * to support this for backwards-compatibility, so make sure we allow new sessions on a VT that a
 918          * greeter is running on. Furthermore, to allow re-logins, we have to allow a greeter to take over a
 919          * used VT for the exact same reasons. */
 920         if (c != SESSION_GREETER &&
 921             vtnr > 0 &&
 922             vtnr < MALLOC_ELEMENTSOF(m->seat0->positions) &&
 923             m->seat0->positions[vtnr] &&
 924             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 925                 return sd_bus_error_set(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 926
 927         if (hashmap_size(m->sessions) >= m->sessions_max)
 928                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
 929                                          "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.",
 930                                          m->sessions_max);
 931
 932         (void) audit_session_from_pid(leader.pid, &audit_id);
 933         if (audit_session_is_valid(audit_id)) {
 934                 /* Keep our session IDs and the audit session IDs in sync */
 935
 936                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 937                         return -ENOMEM;
 938
 939                 /* Wut? There's already a session by this name and we didn't find it above? Weird, then let's
 940                  * not trust the audit data and let's better register a new ID */
 941                 if (hashmap_contains(m->sessions, id)) {
 942                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 943                         audit_id = AUDIT_SESSION_INVALID;
 944                         id = mfree(id);
 945                 }
 946         }
 947
 948         if (!id) {
 949                 do {
 950                         id = mfree(id);
 951
 952                         if (asprintf(&id, "c%" PRIu64, ++m->session_counter) < 0)
 953                                 return -ENOMEM;
 954
 955                 } while (hashmap_contains(m->sessions, id));
 956         }
 957
 958         /* The generated names should not clash with 'auto' or 'self' */
 959         assert(!SESSION_IS_SELF(id));
 960         assert(!SESSION_IS_AUTO(id));
 961
 962         /* If we are not watching utmp already, try again */
 963         manager_reconnect_utmp(m);
 964
 965         r = manager_add_user_by_uid(m, uid, &user);
 966         if (r < 0)
 967                 goto fail;
 968
 969         r = manager_add_session(m, id, &session);
 970         if (r < 0)
 971                 goto fail;
 972
 973         session_set_user(session, user);
 974         r = session_set_leader_consume(session, TAKE_PIDREF(leader));
 975         if (r < 0)
 976                 goto fail;
 977
 978         session->original_type = session->type = t;
 979         session->remote = remote;
 980         session->vtnr = vtnr;
 981         session->class = c;
 982
 983         /* Once the first session that is of a pinning class shows up we'll change the GC mode for the user
 984          * from USER_GC_BY_ANY to USER_GC_BY_PIN, so that the user goes away once the last pinning session
 985          * goes away. Background: we want that user@.service – when started manually – remains around (which
 986          * itself is a non-pinning session), but gets stopped when the last pinning session goes away. */
 987
 988         if (SESSION_CLASS_PIN_USER(c))
 989                 user->gc_mode = USER_GC_BY_PIN;
 990
 991         if (!isempty(tty)) {
 992                 r = strdup_to(&session->tty, tty);
 993                 if (r < 0)
 994                         goto fail;
 995
 996                 session->tty_validity = TTY_FROM_PAM;
 997         }
 998
 999         if (!isempty(display)) {
1000                 r = strdup_to(&session->display, display);
1001                 if (r < 0)
1002                         goto fail;
1003         }
1004
1005         if (!isempty(remote_user)) {
1006                 r = strdup_to(&session->remote_user, remote_user);
1007                 if (r < 0)
1008                         goto fail;
1009         }
1010
1011         if (!isempty(remote_host)) {
1012                 r = strdup_to(&session->remote_host, remote_host);
1013                 if (r < 0)
1014                         goto fail;
1015         }
1016
1017         if (!isempty(service)) {
1018                 r = strdup_to(&session->service, service);
1019                 if (r < 0)
1020                         goto fail;
1021         }
1022
1023         if (!isempty(desktop)) {
1024                 r = strdup_to(&session->desktop, desktop);
1025                 if (r < 0)
1026                         goto fail;
1027         }
1028
1029         if (seat) {
1030                 r = seat_attach_session(seat, session);
1031                 if (r < 0)
1032                         goto fail;
1033         }
1034
1035         r = sd_bus_message_enter_container(message, 'a', "(sv)");
1036         if (r < 0)
1037                 goto fail;
1038
1039         r = session_start(session, message, error);
1040         if (r < 0)
1041                 goto fail;
1042
1043         r = sd_bus_message_exit_container(message);
1044         if (r < 0)
1045                 goto fail;
1046
1047         session->create_message = sd_bus_message_ref(message);
1048
1049         /* Now call into session_send_create_reply(), which will reply to this method call for us. Or it
1050          * won't – in case we just spawned a session scope and/or user service manager, and they aren't ready
1051          * yet. We'll call session_create_reply() again once the session scope or the user service manager is
1052          * ready, where the function will check again if a reply is then ready to be sent, and then do so if
1053          * all is complete - or wait again. */
1054         r = session_send_create_reply(session, /* error= */ NULL);
1055         if (r < 0)
1056                 return r;
1057
1058         return 1;
1059
1060 fail:
1061         if (session)
1062                 session_add_to_gc_queue(session);
1063
1064         if (user)
1065                 user_add_to_gc_queue(user);
1066
1067         return r;
1068 }
1069
1070 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1071         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
1072         pid_t leader_pid;
1073         uint32_t vtnr;
1074         uid_t uid;
1075         int remote, r;
1076
1077         assert(message);
1078
1079         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
1080         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
1081
1082         r = sd_bus_message_read(
1083                         message,
1084                         "uusssssussbss",
1085                         &uid,
1086                         &leader_pid,
1087                         &service,
1088                         &type,
1089                         &class,
1090                         &desktop,
1091                         &cseat,
1092                         &vtnr,
1093                         &tty,
1094                         &display,
1095                         &remote,
1096                         &remote_user,
1097                         &remote_host);
1098         if (r < 0)
1099                 return r;
1100
1101         return create_session(
1102                         message,
1103                         userdata,
1104                         error,
1105                         uid,
1106                         leader_pid,
1107                         /* pidfd = */ -EBADF,
1108                         service,
1109                         type,
1110                         class,
1111                         desktop,
1112                         cseat,
1113                         vtnr,
1114                         tty,
1115                         display,
1116                         remote,
1117                         remote_user,
1118                         remote_host,
1119                         /* flags = */ 0);
1120 }
1121
1122 static int method_create_session_pidfd(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1123         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
1124         uint64_t flags;
1125         uint32_t vtnr;
1126         uid_t uid;
1127         int leader_fd = -EBADF, remote, r;
1128
1129         r = sd_bus_message_read(
1130                         message,
1131                         "uhsssssussbsst",
1132                         &uid,
1133                         &leader_fd,
1134                         &service,
1135                         &type,
1136                         &class,
1137                         &desktop,
1138                         &cseat,
1139                         &vtnr,
1140                         &tty,
1141                         &display,
1142                         &remote,
1143                         &remote_user,
1144                         &remote_host,
1145                         &flags);
1146         if (r < 0)
1147                 return r;
1148
1149         return create_session(
1150                         message,
1151                         userdata,
1152                         error,
1153                         uid,
1154                         /* leader_pid = */ 0,
1155                         leader_fd,
1156                         service,
1157                         type,
1158                         class,
1159                         desktop,
1160                         cseat,
1161                         vtnr,
1162                         tty,
1163                         display,
1164                         remote,
1165                         remote_user,
1166                         remote_host,
1167                         flags);
1168 }
1169
1170 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1171         Manager *m = ASSERT_PTR(userdata);
1172         Session *session;
1173         const char *name;
1174         int r;
1175
1176         assert(message);
1177
1178         r = sd_bus_message_read(message, "s", &name);
1179         if (r < 0)
1180                 return r;
1181
1182         r = manager_get_session_from_creds(m, message, name, error, &session);
1183         if (r < 0)
1184                 return r;
1185
1186         r = session_release(session);
1187         if (r < 0)
1188                 return r;
1189
1190         return sd_bus_reply_method_return(message, NULL);
1191 }
1192
1193 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1194         Manager *m = ASSERT_PTR(userdata);
1195         Session *session;
1196         const char *name;
1197         int r;
1198
1199         assert(message);
1200
1201         r = sd_bus_message_read(message, "s", &name);
1202         if (r < 0)
1203                 return r;
1204
1205         r = manager_get_session_from_creds(m, message, name, error, &session);
1206         if (r < 0)
1207                 return r;
1208
1209         /* PolicyKit is done by bus_session_method_activate() */
1210
1211         return bus_session_method_activate(message, session, error);
1212 }
1213
1214 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1215         const char *session_name, *seat_name;
1216         Manager *m = ASSERT_PTR(userdata);
1217         Session *session;
1218         Seat *seat;
1219         int r;
1220
1221         assert(message);
1222
1223         /* Same as ActivateSession() but refuses to work if the seat doesn't match */
1224
1225         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
1226         if (r < 0)
1227                 return r;
1228
1229         r = manager_get_session_from_creds(m, message, session_name, error, &session);
1230         if (r < 0)
1231                 return r;
1232
1233         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
1234         if (r < 0)
1235                 return r;
1236
1237         if (session->seat != seat)
1238                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT,
1239                                          "Session %s not on seat %s", session_name, seat_name);
1240
1241         r = check_polkit_chvt(message, m, error);
1242         if (r < 0)
1243                 return r;
1244         if (r == 0)
1245                 return 1; /* Will call us back */
1246
1247         r = session_activate(session);
1248         if (r < 0)
1249                 return r;
1250
1251         return sd_bus_reply_method_return(message, NULL);
1252 }
1253
1254 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1255         Manager *m = ASSERT_PTR(userdata);
1256         Session *session;
1257         const char *name;
1258         int r;
1259
1260         assert(message);
1261
1262         r = sd_bus_message_read(message, "s", &name);
1263         if (r < 0)
1264                 return r;
1265
1266         r = manager_get_session_from_creds(m, message, name, error, &session);
1267         if (r < 0)
1268                 return r;
1269
1270         return bus_session_method_lock(message, session, error);
1271 }
1272
1273 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1274         Manager *m = ASSERT_PTR(userdata);
1275         int r;
1276
1277         assert(message);
1278
1279         r = bus_verify_polkit_async(
1280                         message,
1281                         "org.freedesktop.login1.lock-sessions",
1282                         /* details= */ NULL,
1283                         &m->polkit_registry,
1284                         error);
1285         if (r < 0)
1286                 return r;
1287         if (r == 0)
1288                 return 1; /* Will call us back */
1289
1290         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1291         if (r < 0)
1292                 return r;
1293
1294         return sd_bus_reply_method_return(message, NULL);
1295 }
1296
1297 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1298         const char *name;
1299         Manager *m = ASSERT_PTR(userdata);
1300         Session *session;
1301         int r;
1302
1303         assert(message);
1304
1305         r = sd_bus_message_read(message, "s", &name);
1306         if (r < 0)
1307                 return r;
1308
1309         r = manager_get_session_from_creds(m, message, name, error, &session);
1310         if (r < 0)
1311                 return r;
1312
1313         return bus_session_method_kill(message, session, error);
1314 }
1315
1316 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1317         Manager *m = ASSERT_PTR(userdata);
1318         uint32_t uid;
1319         User *user;
1320         int r;
1321
1322         assert(message);
1323
1324         r = sd_bus_message_read(message, "u", &uid);
1325         if (r < 0)
1326                 return r;
1327
1328         r = manager_get_user_from_creds(m, message, uid, error, &user);
1329         if (r < 0)
1330                 return r;
1331
1332         return bus_user_method_kill(message, user, error);
1333 }
1334
1335 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1336         Manager *m = ASSERT_PTR(userdata);
1337         const char *name;
1338         Session *session;
1339         int r;
1340
1341         assert(message);
1342
1343         r = sd_bus_message_read(message, "s", &name);
1344         if (r < 0)
1345                 return r;
1346
1347         r = manager_get_session_from_creds(m, message, name, error, &session);
1348         if (r < 0)
1349                 return r;
1350
1351         return bus_session_method_terminate(message, session, error);
1352 }
1353
1354 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1355         Manager *m = ASSERT_PTR(userdata);
1356         uint32_t uid;
1357         User *user;
1358         int r;
1359
1360         assert(message);
1361
1362         r = sd_bus_message_read(message, "u", &uid);
1363         if (r < 0)
1364                 return r;
1365
1366         r = manager_get_user_from_creds(m, message, uid, error, &user);
1367         if (r < 0)
1368                 return r;
1369
1370         return bus_user_method_terminate(message, user, error);
1371 }
1372
1373 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1374         Manager *m = ASSERT_PTR(userdata);
1375         const char *name;
1376         Seat *seat;
1377         int r;
1378
1379         assert(message);
1380
1381         r = sd_bus_message_read(message, "s", &name);
1382         if (r < 0)
1383                 return r;
1384
1385         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1386         if (r < 0)
1387                 return r;
1388
1389         return bus_seat_method_terminate(message, seat, error);
1390 }
1391
1392 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1393         Manager *m = ASSERT_PTR(userdata);
1394         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1395         uint32_t uid, auth_uid;
1396         int r, enable, interactive;
1397
1398         assert(message);
1399
1400         r = sd_bus_message_read(message, "ubb", &uid, &enable, &interactive);
1401         if (r < 0)
1402                 return r;
1403
1404         r = sd_bus_query_sender_creds(message,
1405                                       SD_BUS_CREDS_EUID|SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT,
1406                                       &creds);
1407         if (r < 0)
1408                 return r;
1409
1410         if (!uid_is_valid(uid)) {
1411                 /* Note that we get the owner UID of the session or user unit, not the actual client UID here! */
1412                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1413                 if (r < 0)
1414                         return r;
1415         }
1416
1417         /* owner_uid is racy, so for authorization we must use euid */
1418         r = sd_bus_creds_get_euid(creds, &auth_uid);
1419         if (r < 0)
1420                 return r;
1421
1422         _cleanup_free_ struct passwd *pw = NULL;
1423
1424         r = getpwuid_malloc(uid, &pw);
1425         if (r < 0)
1426                 return r;
1427
1428         r = bus_verify_polkit_async_full(
1429                         message,
1430                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1431                                           "org.freedesktop.login1.set-user-linger",
1432                         /* details= */ NULL,
1433                         /* good_user= */ UID_INVALID,
1434                         interactive ? POLKIT_ALLOW_INTERACTIVE : 0,
1435                         &m->polkit_registry,
1436                         error);
1437         if (r < 0)
1438                 return r;
1439         if (r == 0)
1440                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1441
1442         (void) mkdir_p_label("/var/lib/systemd", 0755);
1443         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1444         if (r < 0)
1445                 return r;
1446
1447         _cleanup_free_ char *escaped = NULL;
1448         const char *path;
1449         User *u;
1450
1451         escaped = cescape(pw->pw_name);
1452         if (!escaped)
1453                 return -ENOMEM;
1454
1455         path = strjoina("/var/lib/systemd/linger/", escaped);
1456
1457         if (enable) {
1458                 r = touch(path);
1459                 if (r < 0)
1460                         return r;
1461
1462                 if (manager_add_user_by_uid(m, uid, &u) >= 0) {
1463                         r = user_start(u);
1464                         if (r < 0) {
1465                                 user_add_to_gc_queue(u);
1466                                 return r;
1467                         }
1468                 }
1469
1470         } else {
1471                 r = unlink(path);
1472                 if (r < 0 && errno != ENOENT)
1473                         return -errno;
1474
1475                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1476                 if (u)
1477                         user_add_to_gc_queue(u);
1478         }
1479
1480         return sd_bus_reply_method_return(message, NULL);
1481 }
1482
1483 static int trigger_device(Manager *m, sd_device *parent) {
1484         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
1485         int r;
1486
1487         assert(m);
1488
1489         r = sd_device_enumerator_new(&e);
1490         if (r < 0)
1491                 return r;
1492
1493         r = sd_device_enumerator_allow_uninitialized(e);
1494         if (r < 0)
1495                 return r;
1496
1497         if (parent) {
1498                 r = sd_device_enumerator_add_match_parent(e, parent);
1499                 if (r < 0)
1500                         return r;
1501         }
1502
1503         FOREACH_DEVICE(e, d) {
1504                 r = sd_device_trigger(d, SD_DEVICE_CHANGE);
1505                 if (r < 0)
1506                         log_device_debug_errno(d, r, "Failed to trigger device, ignoring: %m");
1507         }
1508
1509         return 0;
1510 }
1511
1512 static int attach_device(Manager *m, const char *seat, const char *sysfs, sd_bus_error *error) {
1513         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
1514         _cleanup_free_ char *rule = NULL, *file = NULL;
1515         const char *id_for_seat;
1516         int r;
1517
1518         assert(m);
1519         assert(seat);
1520         assert(sysfs);
1521
1522         r = sd_device_new_from_syspath(&d, sysfs);
1523         if (r < 0)
1524                 return sd_bus_error_set_errnof(error, r, "Failed to open device '%s': %m", sysfs);
1525
1526         if (sd_device_has_current_tag(d, "seat") <= 0)
1527                 return sd_bus_error_set_errnof(error, ENODEV, "Device '%s' lacks 'seat' udev tag.", sysfs);
1528
1529         if (sd_device_get_property_value(d, "ID_FOR_SEAT", &id_for_seat) < 0)
1530                 return sd_bus_error_set_errnof(error, ENODEV, "Device '%s' lacks 'ID_FOR_SEAT' udev property.", sysfs);
1531
1532         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1533                 return -ENOMEM;
1534
1535         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1536                 return -ENOMEM;
1537
1538         (void) mkdir_p_label("/etc/udev/rules.d", 0755);
1539         r = write_string_file_atomic_label(file, rule);
1540         if (r < 0)
1541                 return r;
1542
1543         return trigger_device(m, d);
1544 }
1545
1546 static int flush_devices(Manager *m) {
1547         _cleanup_closedir_ DIR *d = NULL;
1548
1549         assert(m);
1550
1551         d = opendir("/etc/udev/rules.d");
1552         if (!d) {
1553                 if (errno != ENOENT)
1554                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1555         } else
1556                 FOREACH_DIRENT_ALL(de, d, break) {
1557                         if (!dirent_is_file(de))
1558                                 continue;
1559
1560                         if (!startswith(de->d_name, "72-seat-"))
1561                                 continue;
1562
1563                         if (!endswith(de->d_name, ".rules"))
1564                                 continue;
1565
1566                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1567                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1568                 }
1569
1570         return trigger_device(m, NULL);
1571 }
1572
1573 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1574         const char *sysfs, *seat;
1575         Manager *m = ASSERT_PTR(userdata);
1576         int interactive, r;
1577
1578         assert(message);
1579
1580         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1581         if (r < 0)
1582                 return r;
1583
1584         if (!path_is_normalized(sysfs))
1585                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not normalized", sysfs);
1586         if (!path_startswith(sysfs, "/sys"))
1587                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1588
1589         if (SEAT_IS_SELF(seat) || SEAT_IS_AUTO(seat)) {
1590                 Seat *found;
1591
1592                 r = manager_get_seat_from_creds(m, message, seat, error, &found);
1593                 if (r < 0)
1594                         return r;
1595
1596                 seat = found->id;
1597
1598         } else if (!seat_name_is_valid(seat)) /* Note that a seat does not have to exist yet for this operation to succeed */
1599                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat name %s is not valid", seat);
1600
1601         r = bus_verify_polkit_async_full(
1602                         message,
1603                         "org.freedesktop.login1.attach-device",
1604                         /* details= */ NULL,
1605                         /* good_user= */ UID_INVALID,
1606                         interactive ? POLKIT_ALLOW_INTERACTIVE : 0,
1607                         &m->polkit_registry,
1608                         error);
1609         if (r < 0)
1610                 return r;
1611         if (r == 0)
1612                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1613
1614         r = attach_device(m, seat, sysfs, error);
1615         if (r < 0)
1616                 return r;
1617
1618         return sd_bus_reply_method_return(message, NULL);
1619 }
1620
1621 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1622         Manager *m = ASSERT_PTR(userdata);
1623         int interactive, r;
1624
1625         assert(message);
1626
1627         r = sd_bus_message_read(message, "b", &interactive);
1628         if (r < 0)
1629                 return r;
1630
1631         r = bus_verify_polkit_async_full(
1632                         message,
1633                         "org.freedesktop.login1.flush-devices",
1634                         /* details= */ NULL,
1635                         /* good_user= */ UID_INVALID,
1636                         interactive ? POLKIT_ALLOW_INTERACTIVE : 0,
1637                         &m->polkit_registry,
1638                         error);
1639         if (r < 0)
1640                 return r;
1641         if (r == 0)
1642                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1643
1644         r = flush_devices(m);
1645         if (r < 0)
1646                 return r;
1647
1648         return sd_bus_reply_method_return(message, NULL);
1649 }
1650
1651 static int have_multiple_sessions(
1652                 Manager *m,
1653                 uid_t uid) {
1654
1655         Session *session;
1656
1657         assert(m);
1658
1659         /* Check for other users' sessions. Greeter sessions do not
1660          * count, and non-login sessions do not count either. */
1661         HASHMAP_FOREACH(session, m->sessions)
1662                 if (IN_SET(session->class, SESSION_USER, SESSION_USER_EARLY) &&
1663                     session->user->user_record->uid != uid)
1664                         return true;
1665
1666         return false;
1667 }
1668
1669 static int bus_manager_log_shutdown(
1670                 Manager *m,
1671                 const HandleActionData *a) {
1672         assert(m);
1673         assert(a);
1674
1675         const char *message = a->message ?: "System is shutting down";
1676         const char *log_verb = a->log_verb ? strjoina("SHUTDOWN=", a->log_verb) : NULL;
1677
1678         return log_struct(LOG_NOTICE,
1679                           "MESSAGE_ID=%s", a->message_id ?: SD_MESSAGE_SHUTDOWN_STR,
1680                           LOG_MESSAGE("%s%s%s%s.",
1681                                       message,
1682                                       m->wall_message ? " (" : "",
1683                                       strempty(m->wall_message),
1684                                       m->wall_message ? ")" : ""),
1685                           log_verb);
1686 }
1687
1688 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1689         Manager *m = ASSERT_PTR(userdata);
1690
1691         assert(e);
1692
1693         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1694         return 0;
1695 }
1696
1697 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1698         int r;
1699
1700         assert(m);
1701
1702         if (until <= now(CLOCK_MONOTONIC))
1703                 return 0;
1704
1705         /* We want to ignore the lid switch for a while after each
1706          * suspend, and after boot-up. Hence let's install a timer for
1707          * this. As long as the event source exists we ignore the lid
1708          * switch. */
1709
1710         if (m->lid_switch_ignore_event_source) {
1711                 usec_t u;
1712
1713                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1714                 if (r < 0)
1715                         return r;
1716
1717                 if (until <= u)
1718                         return 0;
1719
1720                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1721         } else
1722                 r = sd_event_add_time(
1723                                 m->event,
1724                                 &m->lid_switch_ignore_event_source,
1725                                 CLOCK_MONOTONIC,
1726                                 until, 0,
1727                                 lid_switch_ignore_handler, m);
1728
1729         return r;
1730 }
1731
1732 static int send_prepare_for(Manager *m, const HandleActionData *a, bool _active) {
1733         int k = 0, r, active = _active;
1734
1735         assert(m);
1736         assert(a);
1737         assert(IN_SET(a->inhibit_what, INHIBIT_SHUTDOWN, INHIBIT_SLEEP));
1738
1739         /* We need to send both old and new signal for backward compatibility. The newer one allows clients
1740          * to know which type of reboot is going to happen, as they might be doing different actions (e.g.:
1741          * on soft-reboot), and it is sent first, so that clients know that if they receive the old one
1742          * first then they don't have to wait for the new one, as it means it's not supported. So, do not
1743          * change the order here, as it is an API. */
1744         if (a->inhibit_what == INHIBIT_SHUTDOWN) {
1745                 k = sd_bus_emit_signal(m->bus,
1746                                        "/org/freedesktop/login1",
1747                                        "org.freedesktop.login1.Manager",
1748                                        "PrepareForShutdownWithMetadata",
1749                                        "ba{sv}",
1750                                        active,
1751                                        1,
1752                                        "type",
1753                                        "s",
1754                                        handle_action_to_string(a->handle));
1755                 if (k < 0)
1756                         log_debug_errno(k, "Failed to emit PrepareForShutdownWithMetadata(): %m");
1757         }
1758
1759         r = sd_bus_emit_signal(m->bus,
1760                                "/org/freedesktop/login1",
1761                                "org.freedesktop.login1.Manager",
1762                                a->inhibit_what == INHIBIT_SHUTDOWN ? "PrepareForShutdown" : "PrepareForSleep",
1763                                "b",
1764                                active);
1765         if (r < 0)
1766                 log_debug_errno(r, "Failed to emit PrepareForShutdown(): %m");
1767
1768         return RET_GATHER(k, r);
1769 }
1770
1771 static int strdup_job(sd_bus_message *reply, char **ret) {
1772         const char *j;
1773         char *job;
1774         int r;
1775
1776         assert(reply);
1777         assert(ret);
1778
1779         r = sd_bus_message_read_basic(reply, 'o', &j);
1780         if (r < 0)
1781                 return r;
1782
1783         job = strdup(j);
1784         if (!job)
1785                 return -ENOMEM;
1786
1787         *ret = job;
1788         return 0;
1789 }
1790
1791 static int execute_shutdown_or_sleep(
1792                 Manager *m,
1793                 const HandleActionData *a,
1794                 sd_bus_error *error) {
1795
1796         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1797         int r;
1798
1799         assert(m);
1800         assert(!m->action_job);
1801         assert(a);
1802
1803         if (a->inhibit_what == INHIBIT_SHUTDOWN)
1804                 bus_manager_log_shutdown(m, a);
1805
1806         r = bus_call_method(
1807                         m->bus,
1808                         bus_systemd_mgr,
1809                         "StartUnit",
1810                         error,
1811                         &reply,
1812                         "ss", a->target, "replace-irreversibly");
1813         if (r < 0)
1814                 goto fail;
1815
1816         r = strdup_job(reply, &m->action_job);
1817         if (r < 0)
1818                 goto fail;
1819
1820         m->delayed_action = a;
1821
1822         /* Make sure the lid switch is ignored for a while */
1823         manager_set_lid_switch_ignore(m, usec_add(now(CLOCK_MONOTONIC), m->holdoff_timeout_usec));
1824
1825         return 0;
1826
1827 fail:
1828         /* Tell people that they now may take a lock again */
1829         (void) send_prepare_for(m, a, false);
1830
1831         return r;
1832 }
1833
1834 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1835         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1836         Inhibitor *offending = NULL;
1837         int r;
1838
1839         assert(manager);
1840
1841         if (!manager->delayed_action || manager->action_job)
1842                 return 0;
1843
1844         if (manager_is_inhibited(manager, manager->delayed_action->inhibit_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1845                 _cleanup_free_ char *comm = NULL, *u = NULL;
1846
1847                 if (!timeout)
1848                         return 0;
1849
1850                 (void) pidref_get_comm(&offending->pid, &comm);
1851                 u = uid_to_name(offending->uid);
1852
1853                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1854                            offending->uid, strna(u),
1855                            offending->pid.pid, strna(comm));
1856         }
1857
1858         /* Actually do the operation */
1859         r = execute_shutdown_or_sleep(manager, manager->delayed_action, &error);
1860         if (r < 0) {
1861                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1862                             bus_error_message(&error, r));
1863
1864                 manager->delayed_action = NULL;
1865         }
1866
1867         return 1; /* We did some work. */
1868 }
1869
1870 static int manager_inhibit_timeout_handler(
1871                         sd_event_source *s,
1872                         uint64_t usec,
1873                         void *userdata) {
1874
1875         Manager *manager = ASSERT_PTR(userdata);
1876
1877         assert(manager->inhibit_timeout_source == s);
1878
1879         return manager_dispatch_delayed(manager, true);
1880 }
1881
1882 static int delay_shutdown_or_sleep(
1883                 Manager *m,
1884                 const HandleActionData *a) {
1885
1886         int r;
1887
1888         assert(m);
1889         assert(a);
1890
1891         if (m->inhibit_timeout_source) {
1892                 r = sd_event_source_set_time_relative(m->inhibit_timeout_source, m->inhibit_delay_max);
1893                 if (r < 0)
1894                         return log_error_errno(r, "sd_event_source_set_time_relative() failed: %m");
1895
1896                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1897                 if (r < 0)
1898                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1899         } else {
1900                 r = sd_event_add_time_relative(
1901                                 m->event,
1902                                 &m->inhibit_timeout_source,
1903                                 CLOCK_MONOTONIC, m->inhibit_delay_max, 0,
1904                                 manager_inhibit_timeout_handler, m);
1905                 if (r < 0)
1906                         return r;
1907         }
1908
1909         m->delayed_action = a;
1910
1911         return 0;
1912 }
1913
1914 int bus_manager_shutdown_or_sleep_now_or_later(
1915                 Manager *m,
1916                 const HandleActionData *a,
1917                 sd_bus_error *error) {
1918
1919         _cleanup_free_ char *load_state = NULL;
1920         bool delayed;
1921         int r;
1922
1923         assert(m);
1924         assert(a);
1925         assert(!m->action_job);
1926
1927         r = unit_load_state(m->bus, a->target, &load_state);
1928         if (r < 0)
1929                 return r;
1930
1931         if (!streq(load_state, "loaded"))
1932                 return log_notice_errno(SYNTHETIC_ERRNO(EACCES),
1933                                         "Unit %s is %s, refusing operation.",
1934                                         a->target, load_state);
1935
1936         /* Tell everybody to prepare for shutdown/sleep */
1937         (void) send_prepare_for(m, a, true);
1938
1939         delayed =
1940                 m->inhibit_delay_max > 0 &&
1941                 manager_is_inhibited(m, a->inhibit_what, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1942
1943         if (delayed)
1944                 /* Shutdown is delayed, keep in mind what we
1945                  * want to do, and start a timeout */
1946                 r = delay_shutdown_or_sleep(m, a);
1947         else
1948                 /* Shutdown is not delayed, execute it
1949                  * immediately */
1950                 r = execute_shutdown_or_sleep(m, a, error);
1951
1952         return r;
1953 }
1954
1955 static int verify_shutdown_creds(
1956                 Manager *m,
1957                 sd_bus_message *message,
1958                 const HandleActionData *a,
1959                 uint64_t flags,
1960                 sd_bus_error *error) {
1961
1962         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1963         bool multiple_sessions, blocked, interactive;
1964         uid_t uid;
1965         int r;
1966
1967         assert(m);
1968         assert(a);
1969         assert(message);
1970
1971         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1972         if (r < 0)
1973                 return r;
1974
1975         r = sd_bus_creds_get_euid(creds, &uid);
1976         if (r < 0)
1977                 return r;
1978
1979         r = have_multiple_sessions(m, uid);
1980         if (r < 0)
1981                 return r;
1982
1983         multiple_sessions = r > 0;
1984         blocked = manager_is_inhibited(m, a->inhibit_what, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1985         interactive = flags & SD_LOGIND_INTERACTIVE;
1986
1987         if (multiple_sessions) {
1988                 r = bus_verify_polkit_async_full(
1989                                 message,
1990                                 a->polkit_action_multiple_sessions,
1991                                 /* details= */ NULL,
1992                                 /* good_user= */ UID_INVALID,
1993                                 interactive ? POLKIT_ALLOW_INTERACTIVE : 0,
1994                                 &m->polkit_registry,
1995                                 error);
1996                 if (r < 0)
1997                         return r;
1998                 if (r == 0)
1999                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2000         }
2001
2002         if (blocked) {
2003                 /* We don't check polkit for root here, because you can't be more privileged than root */
2004                 if (uid == 0 && (flags & SD_LOGIND_ROOT_CHECK_INHIBITORS))
2005                         return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED,
2006                                                  "Access denied to root due to active block inhibitor");
2007
2008                 r = bus_verify_polkit_async_full(
2009                                 message,
2010                                 a->polkit_action_ignore_inhibit,
2011                                 /* details= */ NULL,
2012                                 /* good_user= */ UID_INVALID,
2013                                 interactive ? POLKIT_ALLOW_INTERACTIVE : 0,
2014                                 &m->polkit_registry,
2015                                 error);
2016                 if (r < 0)
2017                         return r;
2018                 if (r == 0)
2019                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2020         }
2021
2022         if (!multiple_sessions && !blocked) {
2023                 r = bus_verify_polkit_async_full(
2024                                 message,
2025                                 a->polkit_action,
2026                                 /* details= */ NULL,
2027                                 /* good_user= */ UID_INVALID,
2028                                 interactive ? POLKIT_ALLOW_INTERACTIVE : 0,
2029                                 &m->polkit_registry,
2030                                 error);
2031                 if (r < 0)
2032                         return r;
2033                 if (r == 0)
2034                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2035         }
2036
2037         return 0;
2038 }
2039
2040 static int setup_wall_message_timer(Manager *m, sd_bus_message* message) {
2041         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2042         int r;
2043
2044         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2045         if (r >= 0) {
2046                 const char *tty = NULL;
2047
2048                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2049                 (void) sd_bus_creds_get_tty(creds, &tty);
2050
2051                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2052                 if (r < 0)
2053                         return log_oom();
2054         }
2055
2056         r = manager_setup_wall_message_timer(m);
2057         if (r < 0)
2058                 return r;
2059
2060         return 0;
2061 }
2062
2063 static int method_do_shutdown_or_sleep(
2064                 Manager *m,
2065                 sd_bus_message *message,
2066                 HandleAction action,
2067                 bool with_flags,
2068                 sd_bus_error *error) {
2069
2070         uint64_t flags;
2071         int r;
2072
2073         assert(m);
2074         assert(message);
2075         assert(HANDLE_ACTION_IS_SHUTDOWN(action) || HANDLE_ACTION_IS_SLEEP(action));
2076
2077         if (with_flags) {
2078                 /* New style method: with flags parameter (and interactive bool in the bus message header) */
2079                 r = sd_bus_message_read(message, "t", &flags);
2080                 if (r < 0)
2081                         return r;
2082                 if ((flags & ~SD_LOGIND_SHUTDOWN_AND_SLEEP_FLAGS_PUBLIC) != 0)
2083                         return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS,
2084                                                 "Invalid flags parameter");
2085
2086                 if (FLAGS_SET(flags, (SD_LOGIND_REBOOT_VIA_KEXEC|SD_LOGIND_SOFT_REBOOT)))
2087                         return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS,
2088                                                 "Both reboot via kexec and soft reboot selected, which is not supported");
2089
2090                 if (action != HANDLE_REBOOT) {
2091                         if (flags & SD_LOGIND_REBOOT_VIA_KEXEC)
2092                                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS,
2093                                                         "Reboot via kexec option is only applicable with reboot operations");
2094                         if ((flags & SD_LOGIND_SOFT_REBOOT) || (flags & SD_LOGIND_SOFT_REBOOT_IF_NEXTROOT_SET_UP))
2095                                 return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS,
2096                                                         "Soft reboot option is only applicable with reboot operations");
2097                 }
2098         } else {
2099                 /* Old style method: no flags parameter, but interactive bool passed as boolean in
2100                  * payload. Let's convert this argument to the new-style flags parameter for our internal
2101                  * use. */
2102                 int interactive;
2103
2104                 r = sd_bus_message_read(message, "b", &interactive);
2105                 if (r < 0)
2106                         return r;
2107
2108                 flags = interactive ? SD_LOGIND_INTERACTIVE : 0;
2109         }
2110
2111         const HandleActionData *a = NULL;
2112
2113         if ((flags & SD_LOGIND_SOFT_REBOOT) ||
2114             ((flags & SD_LOGIND_SOFT_REBOOT_IF_NEXTROOT_SET_UP) && path_is_os_tree("/run/nextroot") > 0))
2115                 a = handle_action_lookup(HANDLE_SOFT_REBOOT);
2116         else if ((flags & SD_LOGIND_REBOOT_VIA_KEXEC) && kexec_loaded())
2117                 a = handle_action_lookup(HANDLE_KEXEC);
2118
2119         if (action == HANDLE_SLEEP) {
2120                 HandleAction selected;
2121
2122                 selected = handle_action_sleep_select(m);
2123                 if (selected < 0)
2124                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
2125                                                 "None of the configured sleep operations are supported");
2126
2127                 assert_se(a = handle_action_lookup(selected));
2128
2129         } else if (HANDLE_ACTION_IS_SLEEP(action)) {
2130                 SleepSupport support;
2131
2132                 assert_se(a = handle_action_lookup(action));
2133
2134                 assert(a->sleep_operation >= 0);
2135                 assert(a->sleep_operation < _SLEEP_OPERATION_MAX);
2136
2137                 r = sleep_supported_full(a->sleep_operation, &support);
2138                 if (r < 0)
2139                         return r;
2140                 if (r == 0)
2141                         switch (support) {
2142
2143                         case SLEEP_DISABLED:
2144                                 return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
2145                                                          "Sleep verb '%s' is disabled by config",
2146                                                          sleep_operation_to_string(a->sleep_operation));
2147
2148                         case SLEEP_NOT_CONFIGURED:
2149                         case SLEEP_STATE_OR_MODE_NOT_SUPPORTED:
2150                         case SLEEP_ALARM_NOT_SUPPORTED:
2151                                 return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
2152                                                          "Sleep verb '%s' is not configured or configuration is not supported by kernel",
2153                                                          sleep_operation_to_string(a->sleep_operation));
2154
2155                         case SLEEP_RESUME_NOT_SUPPORTED:
2156                                 return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
2157                                                         "Not running on EFI and resume= is not set. No available method to resume from hibernation");
2158
2159                         case SLEEP_NOT_ENOUGH_SWAP_SPACE:
2160                                 return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
2161                                                         "Not enough suitable swap space for hibernation available on compatible block devices and file systems");
2162
2163                         default:
2164                                 assert_not_reached();
2165
2166                         }
2167         } else if (!a)
2168                 assert_se(a = handle_action_lookup(action));
2169
2170         r = verify_shutdown_creds(m, message, a, flags, error);
2171         if (r != 0)
2172                 return r;
2173
2174         if (m->delayed_action)
2175                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
2176                                          "Action %s already in progress, refusing requested %s operation.",
2177                                          handle_action_to_string(m->delayed_action->handle),
2178                                          handle_action_to_string(a->handle));
2179
2180         /* reset case we're shorting a scheduled shutdown */
2181         m->unlink_nologin = false;
2182         reset_scheduled_shutdown(m);
2183
2184         m->scheduled_shutdown_timeout = 0;
2185         m->scheduled_shutdown_action = action;
2186
2187         (void) setup_wall_message_timer(m, message);
2188
2189         r = bus_manager_shutdown_or_sleep_now_or_later(m, a, error);
2190         if (r < 0)
2191                 return r;
2192
2193         return sd_bus_reply_method_return(message, NULL);
2194 }
2195
2196 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2197         Manager *m = userdata;
2198
2199         return method_do_shutdown_or_sleep(
2200                         m, message,
2201                         HANDLE_POWEROFF,
2202                         sd_bus_message_is_method_call(message, NULL, "PowerOffWithFlags"),
2203                         error);
2204 }
2205
2206 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2207         Manager *m = userdata;
2208
2209         return method_do_shutdown_or_sleep(
2210                         m, message,
2211                         HANDLE_REBOOT,
2212                         sd_bus_message_is_method_call(message, NULL, "RebootWithFlags"),
2213                         error);
2214 }
2215
2216 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2217         Manager *m = userdata;
2218
2219         return method_do_shutdown_or_sleep(
2220                         m, message,
2221                         HANDLE_HALT,
2222                         sd_bus_message_is_method_call(message, NULL, "HaltWithFlags"),
2223                         error);
2224 }
2225
2226 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2227         Manager *m = userdata;
2228
2229         return method_do_shutdown_or_sleep(
2230                         m, message,
2231                         HANDLE_SUSPEND,
2232                         sd_bus_message_is_method_call(message, NULL, "SuspendWithFlags"),
2233                         error);
2234 }
2235
2236 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2237         Manager *m = userdata;
2238
2239         return method_do_shutdown_or_sleep(
2240                         m, message,
2241                         HANDLE_HIBERNATE,
2242                         sd_bus_message_is_method_call(message, NULL, "HibernateWithFlags"),
2243                         error);
2244 }
2245
2246 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2247         Manager *m = userdata;
2248
2249         return method_do_shutdown_or_sleep(
2250                         m, message,
2251                         HANDLE_HYBRID_SLEEP,
2252                         sd_bus_message_is_method_call(message, NULL, "HybridSleepWithFlags"),
2253                         error);
2254 }
2255
2256 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2257         Manager *m = userdata;
2258
2259         return method_do_shutdown_or_sleep(
2260                         m, message,
2261                         HANDLE_SUSPEND_THEN_HIBERNATE,
2262                         sd_bus_message_is_method_call(message, NULL, "SuspendThenHibernateWithFlags"),
2263                         error);
2264 }
2265
2266 static int method_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2267         Manager *m = userdata;
2268
2269         return method_do_shutdown_or_sleep(
2270                         m, message,
2271                         HANDLE_SLEEP,
2272                         /* with_flags = */ true,
2273                         error);
2274 }
2275
2276 static int nologin_timeout_handler(
2277                         sd_event_source *s,
2278                         uint64_t usec,
2279                         void *userdata) {
2280
2281         Manager *m = ASSERT_PTR(userdata);
2282
2283         log_info("Creating /run/nologin, blocking further logins...");
2284
2285         m->unlink_nologin =
2286                 create_shutdown_run_nologin_or_warn() >= 0;
2287
2288         return 0;
2289 }
2290
2291 static usec_t nologin_timeout_usec(usec_t elapse) {
2292         /* Issue /run/nologin five minutes before shutdown */
2293         return LESS_BY(elapse, 5 * USEC_PER_MINUTE);
2294 }
2295
2296 static void reset_scheduled_shutdown(Manager *m) {
2297         assert(m);
2298
2299         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2300         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
2301         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
2302
2303         m->scheduled_shutdown_action = _HANDLE_ACTION_INVALID;
2304         m->scheduled_shutdown_timeout = USEC_INFINITY;
2305         m->scheduled_shutdown_uid = UID_INVALID;
2306         m->scheduled_shutdown_tty = mfree(m->scheduled_shutdown_tty);
2307         m->shutdown_dry_run = false;
2308
2309         if (m->unlink_nologin) {
2310                 (void) unlink_or_warn("/run/nologin");
2311                 m->unlink_nologin = false;
2312         }
2313
2314         (void) unlink(SHUTDOWN_SCHEDULE_FILE);
2315 }
2316
2317 static int update_schedule_file(Manager *m) {
2318         _cleanup_(unlink_and_freep) char *temp_path = NULL;
2319         _cleanup_fclose_ FILE *f = NULL;
2320         int r;
2321
2322         assert(m);
2323         assert(handle_action_valid(m->scheduled_shutdown_action));
2324
2325         r = mkdir_parents_label(SHUTDOWN_SCHEDULE_FILE, 0755);
2326         if (r < 0)
2327                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
2328
2329         r = fopen_temporary(SHUTDOWN_SCHEDULE_FILE, &f, &temp_path);
2330         if (r < 0)
2331                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
2332
2333         (void) fchmod(fileno(f), 0644);
2334
2335         serialize_usec(f, "USEC", m->scheduled_shutdown_timeout);
2336         serialize_item_format(f, "WARN_WALL", "%s", one_zero(m->enable_wall_messages));
2337         serialize_item_format(f, "MODE", "%s", handle_action_to_string(m->scheduled_shutdown_action));
2338         serialize_item_format(f, "UID", UID_FMT, m->scheduled_shutdown_uid);
2339
2340         if (m->scheduled_shutdown_tty)
2341                 serialize_item_format(f, "TTY", "%s", m->scheduled_shutdown_tty);
2342
2343         if (!isempty(m->wall_message)) {
2344                 r = serialize_item_escaped(f, "WALL_MESSAGE", m->wall_message);
2345                 if (r < 0)
2346                         goto fail;
2347         }
2348
2349         r = fflush_and_check(f);
2350         if (r < 0)
2351                 goto fail;
2352
2353         if (rename(temp_path, SHUTDOWN_SCHEDULE_FILE) < 0) {
2354                 r = -errno;
2355                 goto fail;
2356         }
2357
2358         temp_path = mfree(temp_path);
2359         return 0;
2360
2361 fail:
2362         (void) unlink(SHUTDOWN_SCHEDULE_FILE);
2363
2364         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2365 }
2366
2367 static int manager_scheduled_shutdown_handler(
2368                         sd_event_source *s,
2369                         uint64_t usec,
2370                         void *userdata) {
2371
2372         Manager *m = ASSERT_PTR(userdata);
2373         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2374         const HandleActionData *a;
2375         int r;
2376
2377         assert_se(a = handle_action_lookup(m->scheduled_shutdown_action));
2378
2379         /* Don't allow multiple jobs being executed at the same time */
2380         if (m->delayed_action) {
2381                 r = log_error_errno(SYNTHETIC_ERRNO(EALREADY),
2382                                     "Scheduled shutdown to %s failed: shutdown or sleep operation already in progress.",
2383                                     a->target);
2384                 goto error;
2385         }
2386
2387         if (m->shutdown_dry_run) {
2388                 /* We do not process delay inhibitors here.  Otherwise, we
2389                  * would have to be considered "in progress" (like the check
2390                  * above) for some seconds after our admin has seen the final
2391                  * wall message. */
2392
2393                 bus_manager_log_shutdown(m, a);
2394                 log_info("Running in dry run, suppressing action.");
2395                 reset_scheduled_shutdown(m);
2396
2397                 return 0;
2398         }
2399
2400         r = bus_manager_shutdown_or_sleep_now_or_later(m, a, &error);
2401         if (r < 0) {
2402                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", a->target);
2403                 goto error;
2404         }
2405
2406         return 0;
2407
2408 error:
2409         reset_scheduled_shutdown(m);
2410         return r;
2411 }
2412
2413 static int manager_setup_shutdown_timers(Manager* m) {
2414         int r;
2415
2416         assert(m);
2417
2418         r = event_reset_time(m->event, &m->scheduled_shutdown_timeout_source,
2419                              CLOCK_REALTIME,
2420                              m->scheduled_shutdown_timeout, 0,
2421                              manager_scheduled_shutdown_handler, m,
2422                              0, "scheduled-shutdown-timeout", true);
2423         if (r < 0)
2424                 goto fail;
2425
2426         r = event_reset_time(m->event, &m->nologin_timeout_source,
2427                              CLOCK_REALTIME,
2428                              nologin_timeout_usec(m->scheduled_shutdown_timeout), 0,
2429                              nologin_timeout_handler, m,
2430                              0, "nologin-timeout", true);
2431         if (r < 0)
2432                 goto fail;
2433
2434         return 0;
2435
2436 fail:
2437         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2438         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
2439
2440         return r;
2441 }
2442
2443 void manager_load_scheduled_shutdown(Manager *m) {
2444         _cleanup_fclose_ FILE *f = NULL;
2445         _cleanup_free_ char *usec = NULL,
2446                *warn_wall = NULL,
2447                *mode = NULL,
2448                *wall_message = NULL,
2449                *uid = NULL,
2450                *tty = NULL;
2451         int r;
2452
2453         assert(m);
2454
2455         r = parse_env_file(f, SHUTDOWN_SCHEDULE_FILE,
2456                            "USEC", &usec,
2457                            "WARN_WALL", &warn_wall,
2458                            "MODE", &mode,
2459                            "WALL_MESSAGE", &wall_message,
2460                            "UID", &uid,
2461                            "TTY", &tty);
2462
2463         /* reset will delete the file */
2464         reset_scheduled_shutdown(m);
2465
2466         if (r == -ENOENT)
2467                 return;
2468         if (r < 0)
2469                 return (void) log_debug_errno(r, "Failed to parse " SHUTDOWN_SCHEDULE_FILE ": %m");
2470
2471         HandleAction handle = handle_action_from_string(mode);
2472         if (handle < 0)
2473                 return (void) log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to parse scheduled shutdown type: %s", mode);
2474
2475         if (!usec)
2476                 return (void) log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "USEC is required");
2477         if (deserialize_usec(usec, &m->scheduled_shutdown_timeout) < 0)
2478                 return;
2479
2480         /* assign parsed type only after we know usec is also valid */
2481         m->scheduled_shutdown_action = handle;
2482
2483         if (warn_wall) {
2484                 r = parse_boolean(warn_wall);
2485                 if (r < 0)
2486                         log_debug_errno(r, "Failed to parse enabling wall messages");
2487                 else
2488                         m->enable_wall_messages = r;
2489         }
2490
2491         if (wall_message) {
2492                 _cleanup_free_ char *unescaped = NULL;
2493                 r = cunescape(wall_message, 0, &unescaped);
2494                 if (r < 0)
2495                         log_debug_errno(r, "Failed to parse wall message: %s", wall_message);
2496                 else
2497                         free_and_replace(m->wall_message, unescaped);
2498         }
2499
2500         if (uid) {
2501                 r = parse_uid(uid, &m->scheduled_shutdown_uid);
2502                 if (r < 0)
2503                         log_debug_errno(r, "Failed to parse wall uid: %s", uid);
2504         }
2505
2506         free_and_replace(m->scheduled_shutdown_tty, tty);
2507
2508         r = manager_setup_shutdown_timers(m);
2509         if (r < 0)
2510                 return reset_scheduled_shutdown(m);
2511
2512         (void) manager_setup_wall_message_timer(m);
2513         (void) update_schedule_file(m);
2514
2515         return;
2516 }
2517
2518 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2519         Manager *m = ASSERT_PTR(userdata);
2520         HandleAction handle;
2521         const HandleActionData *a;
2522         uint64_t elapse;
2523         char *type;
2524         int r;
2525         bool dry_run = false;
2526
2527         assert(message);
2528
2529         r = sd_bus_message_read(message, "st", &type, &elapse);
2530         if (r < 0)
2531                 return r;
2532
2533         if (startswith(type, "dry-")) {
2534                 type += 4;
2535                 dry_run = true;
2536         }
2537
2538         handle = handle_action_from_string(type);
2539         if (!HANDLE_ACTION_IS_SHUTDOWN(handle))
2540                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type: %s", type);
2541
2542         assert_se(a = handle_action_lookup(handle));
2543         assert(a->polkit_action);
2544
2545         r = verify_shutdown_creds(m, message, a, 0, error);
2546         if (r != 0)
2547                 return r;
2548
2549         m->scheduled_shutdown_action = handle;
2550         m->shutdown_dry_run = dry_run;
2551         m->scheduled_shutdown_timeout = elapse;
2552
2553         r = manager_setup_shutdown_timers(m);
2554         if (r < 0)
2555                 return r;
2556
2557         r = setup_wall_message_timer(m, message);
2558         if (r >= 0)
2559                 r = update_schedule_file(m);
2560
2561         if (r < 0) {
2562                 reset_scheduled_shutdown(m);
2563                 return r;
2564         }
2565
2566         return sd_bus_reply_method_return(message, NULL);
2567 }
2568
2569 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2570         Manager *m = ASSERT_PTR(userdata);
2571         const HandleActionData *a;
2572         bool cancelled;
2573         int r;
2574
2575         assert(message);
2576
2577         cancelled = handle_action_valid(m->scheduled_shutdown_action) && m->scheduled_shutdown_action != HANDLE_IGNORE;
2578         if (!cancelled)
2579                 return sd_bus_reply_method_return(message, "b", false);
2580
2581         assert_se(a = handle_action_lookup(m->scheduled_shutdown_action));
2582         if (!a->polkit_action)
2583                 return sd_bus_error_set(error, SD_BUS_ERROR_AUTH_FAILED, "Unsupported shutdown type");
2584
2585         r = bus_verify_polkit_async(
2586                         message,
2587                         a->polkit_action,
2588                         /* details= */ NULL,
2589                         &m->polkit_registry,
2590                         error);
2591         if (r < 0)
2592                 return r;
2593         if (r == 0)
2594                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2595
2596         if (m->enable_wall_messages) {
2597                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2598                 const char *tty = NULL;
2599                 uid_t uid = 0;
2600
2601                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2602                 if (r >= 0) {
2603                         (void) sd_bus_creds_get_uid(creds, &uid);
2604                         (void) sd_bus_creds_get_tty(creds, &tty);
2605                 }
2606
2607                 _cleanup_free_ char *username = uid_to_name(uid);
2608
2609                 log_struct(LOG_INFO,
2610                            LOG_MESSAGE("System shutdown has been cancelled"),
2611                            "ACTION=%s", handle_action_to_string(a->handle),
2612                            "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_CANCELED_STR,
2613                            username ? "OPERATOR=%s" : NULL, username);
2614
2615                 (void) wall("System shutdown has been cancelled",
2616                             username, tty, logind_wall_tty_filter, m);
2617         }
2618
2619         reset_scheduled_shutdown(m);
2620
2621         return sd_bus_reply_method_return(message, "b", true);
2622 }
2623
2624 static int method_can_shutdown_or_sleep(
2625                 Manager *m,
2626                 sd_bus_message *message,
2627                 HandleAction action,
2628                 sd_bus_error *error) {
2629
2630         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2631         bool multiple_sessions, challenge, blocked, check_unit_state = true;
2632         const HandleActionData *a;
2633         const char *result = NULL;
2634         uid_t uid;
2635         int r;
2636
2637         assert(m);
2638         assert(message);
2639         assert(HANDLE_ACTION_IS_SHUTDOWN(action) || HANDLE_ACTION_IS_SLEEP(action));
2640
2641         if (action == HANDLE_SLEEP) {
2642                 HandleAction selected;
2643
2644                 selected = handle_action_sleep_select(m);
2645                 if (selected < 0)
2646                         return sd_bus_reply_method_return(message, "s", "na");
2647
2648                 check_unit_state = false; /* Already handled by handle_action_sleep_select */
2649
2650                 assert_se(a = handle_action_lookup(selected));
2651
2652         } else if (HANDLE_ACTION_IS_SLEEP(action)) {
2653                 SleepSupport support;
2654
2655                 assert_se(a = handle_action_lookup(action));
2656
2657                 assert(a->sleep_operation >= 0);
2658                 assert(a->sleep_operation < _SLEEP_OPERATION_MAX);
2659
2660                 r = sleep_supported_full(a->sleep_operation, &support);
2661                 if (r < 0)
2662                         return r;
2663                 if (r == 0)
2664                         return sd_bus_reply_method_return(message, "s", support == SLEEP_DISABLED ? "no" : "na");
2665         } else
2666                 assert_se(a = handle_action_lookup(action));
2667
2668         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2669         if (r < 0)
2670                 return r;
2671
2672         r = sd_bus_creds_get_euid(creds, &uid);
2673         if (r < 0)
2674                 return r;
2675
2676         r = have_multiple_sessions(m, uid);
2677         if (r < 0)
2678                 return r;
2679
2680         multiple_sessions = r > 0;
2681         blocked = manager_is_inhibited(m, a->inhibit_what, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2682
2683         if (check_unit_state && a->target) {
2684                 _cleanup_free_ char *load_state = NULL;
2685
2686                 r = unit_load_state(m->bus, a->target, &load_state);
2687                 if (r < 0)
2688                         return r;
2689
2690                 if (!streq(load_state, "loaded")) {
2691                         result = "no";
2692                         goto finish;
2693                 }
2694         }
2695
2696         if (multiple_sessions) {
2697                 r = bus_test_polkit(
2698                                 message,
2699                                 a->polkit_action_multiple_sessions,
2700                                 /* details= */ NULL,
2701                                 /* good_user= */ UID_INVALID,
2702                                 &challenge,
2703                                 error);
2704                 if (r < 0)
2705                         return r;
2706
2707                 if (r > 0)
2708                         result = "yes";
2709                 else if (challenge)
2710                         result = "challenge";
2711                 else
2712                         result = "no";
2713         }
2714
2715         if (blocked) {
2716                 r = bus_test_polkit(
2717                                 message,
2718                                 a->polkit_action_ignore_inhibit,
2719                                 /* details= */ NULL,
2720                                 /* good_user= */ UID_INVALID,
2721                                 &challenge,
2722                                 error);
2723                 if (r < 0)
2724                         return r;
2725
2726                 if (r > 0) {
2727                         if (!result)
2728                                 result = "yes";
2729                 } else if (challenge) {
2730                         if (!result || streq(result, "yes"))
2731                                 result = "challenge";
2732                 } else
2733                         result = "no";
2734         }
2735
2736         if (!multiple_sessions && !blocked) {
2737                 /* If neither inhibit nor multiple sessions
2738                  * apply then just check the normal policy */
2739
2740                 r = bus_test_polkit(
2741                                 message,
2742                                 a->polkit_action,
2743                                 /* details= */ NULL,
2744                                 /* good_user= */ UID_INVALID,
2745                                 &challenge,
2746                                 error);
2747                 if (r < 0)
2748                         return r;
2749
2750                 if (r > 0)
2751                         result = "yes";
2752                 else if (challenge)
2753                         result = "challenge";
2754                 else
2755                         result = "no";
2756         }
2757
2758  finish:
2759         return sd_bus_reply_method_return(message, "s", result);
2760 }
2761
2762 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2763         Manager *m = userdata;
2764
2765         return method_can_shutdown_or_sleep(m, message, HANDLE_POWEROFF, error);
2766 }
2767
2768 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2769         Manager *m = userdata;
2770
2771         return method_can_shutdown_or_sleep(m, message, HANDLE_REBOOT, error);
2772 }
2773
2774 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2775         Manager *m = userdata;
2776
2777         return method_can_shutdown_or_sleep(m, message, HANDLE_HALT, error);
2778 }
2779
2780 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2781         Manager *m = userdata;
2782
2783         return method_can_shutdown_or_sleep(m, message, HANDLE_SUSPEND, error);
2784 }
2785
2786 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2787         Manager *m = userdata;
2788
2789         return method_can_shutdown_or_sleep(m, message, HANDLE_HIBERNATE, error);
2790 }
2791
2792 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2793         Manager *m = userdata;
2794
2795         return method_can_shutdown_or_sleep(m, message, HANDLE_HYBRID_SLEEP, error);
2796 }
2797
2798 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2799         Manager *m = userdata;
2800
2801         return method_can_shutdown_or_sleep(m, message, HANDLE_SUSPEND_THEN_HIBERNATE, error);
2802 }
2803
2804 static int method_can_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2805         Manager *m = userdata;
2806
2807         return method_can_shutdown_or_sleep(m, message, HANDLE_SLEEP, error);
2808 }
2809
2810 static int property_get_reboot_parameter(
2811                 sd_bus *bus,
2812                 const char *path,
2813                 const char *interface,
2814                 const char *property,
2815                 sd_bus_message *reply,
2816                 void *userdata,
2817                 sd_bus_error *error) {
2818         _cleanup_free_ char *parameter = NULL;
2819         int r;
2820
2821         assert(bus);
2822         assert(reply);
2823         assert(userdata);
2824
2825         r = read_reboot_parameter(&parameter);
2826         if (r < 0)
2827                 return r;
2828
2829         return sd_bus_message_append(reply, "s", parameter);
2830 }
2831
2832 static int method_set_reboot_parameter(
2833                 sd_bus_message *message,
2834                 void *userdata,
2835                 sd_bus_error *error) {
2836
2837         Manager *m = ASSERT_PTR(userdata);
2838         const char *arg;
2839         int r;
2840
2841         assert(message);
2842
2843         r = sd_bus_message_read(message, "s", &arg);
2844         if (r < 0)
2845                 return r;
2846
2847         r = detect_container();
2848         if (r < 0)
2849                 return r;
2850         if (r > 0)
2851                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
2852                                          "Reboot parameter not supported in containers, refusing.");
2853
2854         r = bus_verify_polkit_async(
2855                         message,
2856                         "org.freedesktop.login1.set-reboot-parameter",
2857                         /* details= */ NULL,
2858                         &m->polkit_registry,
2859                         error);
2860         if (r < 0)
2861                 return r;
2862         if (r == 0)
2863                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2864
2865         r = update_reboot_parameter_and_warn(arg, false);
2866         if (r < 0)
2867                 return r;
2868
2869         return sd_bus_reply_method_return(message, NULL);
2870 }
2871
2872 static int method_can_reboot_parameter(
2873                 sd_bus_message *message,
2874                 void *userdata,
2875                 sd_bus_error *error) {
2876
2877         _unused_ Manager *m = ASSERT_PTR(userdata);
2878         int r;
2879
2880         assert(message);
2881
2882         r = detect_container();
2883         if (r < 0)
2884                 return r;
2885         if (r > 0) /* Inside containers, specifying a reboot parameter, doesn't make much sense */
2886                 return sd_bus_reply_method_return(message, "s", "na");
2887
2888         return return_test_polkit(
2889                         message,
2890                         "org.freedesktop.login1.set-reboot-parameter",
2891                         /* details= */ NULL,
2892                         /* good_user= */ UID_INVALID,
2893                         error);
2894 }
2895
2896 static int property_get_reboot_to_firmware_setup(
2897                 sd_bus *bus,
2898                 const char *path,
2899                 const char *interface,
2900                 const char *property,
2901                 sd_bus_message *reply,
2902                 void *userdata,
2903                 sd_bus_error *error) {
2904         int r;
2905
2906         assert(bus);
2907         assert(reply);
2908         assert(userdata);
2909
2910         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2911         if (r == -ENXIO) {
2912                 /* EFI case: let's see what is currently configured in the EFI variables */
2913                 r = efi_get_reboot_to_firmware();
2914                 if (r < 0 && r != -EOPNOTSUPP)
2915                         log_warning_errno(r, "Failed to determine reboot-to-firmware-setup state: %m");
2916         } else if (r < 0)
2917                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2918         else if (r > 0) {
2919                 /* Non-EFI case: let's see whether /run/systemd/reboot-to-firmware-setup exists. */
2920                 if (access("/run/systemd/reboot-to-firmware-setup", F_OK) < 0) {
2921                         if (errno != ENOENT)
2922                                 log_warning_errno(errno, "Failed to check whether /run/systemd/reboot-to-firmware-setup exists: %m");
2923
2924                         r = false;
2925                 } else
2926                         r = true;
2927         }
2928
2929         return sd_bus_message_append(reply, "b", r > 0);
2930 }
2931
2932 static int method_set_reboot_to_firmware_setup(
2933                 sd_bus_message *message,
2934                 void *userdata,
2935                 sd_bus_error *error) {
2936
2937         Manager *m = ASSERT_PTR(userdata);
2938         bool use_efi;
2939         int b, r;
2940
2941         assert(message);
2942
2943         r = sd_bus_message_read(message, "b", &b);
2944         if (r < 0)
2945                 return r;
2946
2947         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2948         if (r == -ENXIO) {
2949                 /* EFI case: let's see what the firmware supports */
2950
2951                 r = efi_reboot_to_firmware_supported();
2952                 if (r == -EOPNOTSUPP)
2953                         return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2954                 if (r < 0)
2955                         return r;
2956
2957                 use_efi = true;
2958
2959         } else if (r <= 0) {
2960                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to off */
2961
2962                 if (r < 0)
2963                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2964
2965                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2966         } else
2967                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to on */
2968                 use_efi = false;
2969
2970         r = bus_verify_polkit_async(
2971                         message,
2972                         "org.freedesktop.login1.set-reboot-to-firmware-setup",
2973                         /* details= */ NULL,
2974                         &m->polkit_registry,
2975                         error);
2976         if (r < 0)
2977                 return r;
2978         if (r == 0)
2979                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2980
2981         if (use_efi) {
2982                 r = efi_set_reboot_to_firmware(b);
2983                 if (r < 0)
2984                         return r;
2985         } else {
2986                 if (b) {
2987                         r = touch("/run/systemd/reboot-to-firmware-setup");
2988                         if (r < 0)
2989                                 return r;
2990                 } else {
2991                         if (unlink("/run/systemd/reboot-to-firmware-setup") < 0 && errno != ENOENT)
2992                                 return -errno;
2993                 }
2994         }
2995
2996         return sd_bus_reply_method_return(message, NULL);
2997 }
2998
2999 static int method_can_reboot_to_firmware_setup(
3000                 sd_bus_message *message,
3001                 void *userdata,
3002                 sd_bus_error *error) {
3003
3004         _unused_ Manager *m = ASSERT_PTR(userdata);
3005         int r;
3006
3007         assert(message);
3008
3009         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
3010         if (r == -ENXIO) {
3011                 /* EFI case: let's see what the firmware supports */
3012
3013                 r = efi_reboot_to_firmware_supported();
3014                 if (r < 0) {
3015                         if (r != -EOPNOTSUPP)
3016                                 log_warning_errno(r, "Failed to determine whether reboot to firmware is supported: %m");
3017
3018                         return sd_bus_reply_method_return(message, "s", "na");
3019                 }
3020
3021         } else if (r <= 0) {
3022                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP */
3023
3024                 if (r < 0)
3025                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
3026
3027                 return sd_bus_reply_method_return(message, "s", "na");
3028         }
3029
3030         return return_test_polkit(
3031                         message,
3032                         "org.freedesktop.login1.set-reboot-to-firmware-setup",
3033                         /* details= */ NULL,
3034                         /* good_user= */ UID_INVALID,
3035                         error);
3036 }
3037
3038 static int property_get_reboot_to_boot_loader_menu(
3039                 sd_bus *bus,
3040                 const char *path,
3041                 const char *interface,
3042                 const char *property,
3043                 sd_bus_message *reply,
3044                 void *userdata,
3045                 sd_bus_error *error) {
3046
3047         uint64_t x = UINT64_MAX;
3048         int r;
3049
3050         assert(bus);
3051         assert(reply);
3052         assert(userdata);
3053
3054         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
3055         if (r == -ENXIO) {
3056                 /* EFI case: returns the current value of LoaderConfigTimeoutOneShot. Three cases are distinguished:
3057                  *
3058                  *     1. Variable not set, boot into boot loader menu is not enabled (we return UINT64_MAX to the user)
3059                  *     2. Variable set to "0", boot into boot loader menu is enabled with no timeout (we return 0 to the user)
3060                  *     3. Variable set to numeric value formatted in ASCII, boot into boot loader menu with the specified timeout in seconds
3061                  */
3062
3063                 r = efi_loader_get_config_timeout_one_shot(&x);
3064                 if (r < 0) {
3065                         if (r != -ENOENT)
3066                                 log_warning_errno(r, "Failed to read LoaderConfigTimeoutOneShot variable, ignoring: %m");
3067                 }
3068
3069         } else if (r < 0)
3070                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
3071         else if (r > 0) {
3072                 _cleanup_free_ char *v = NULL;
3073
3074                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-menu. */
3075
3076                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-menu", &v);
3077                 if (r < 0) {
3078                         if (r != -ENOENT)
3079                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-menu: %m");
3080                 } else {
3081                         r = safe_atou64(v, &x);
3082                         if (r < 0)
3083                                 log_warning_errno(r, "Failed to parse /run/systemd/reboot-to-boot-loader-menu: %m");
3084                 }
3085         }
3086
3087         return sd_bus_message_append(reply, "t", x);
3088 }
3089
3090 static int method_set_reboot_to_boot_loader_menu(
3091                 sd_bus_message *message,
3092                 void *userdata,
3093                 sd_bus_error *error) {
3094
3095         Manager *m = ASSERT_PTR(userdata);
3096         bool use_efi;
3097         uint64_t x;
3098         int r;
3099
3100         assert(message);
3101
3102         r = sd_bus_message_read(message, "t", &x);
3103         if (r < 0)
3104                 return r;
3105
3106         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
3107         if (r == -ENXIO) {
3108                 uint64_t features;
3109
3110                 /* EFI case: let's see if booting into boot loader menu is supported. */
3111
3112                 r = efi_loader_get_features(&features);
3113                 if (r < 0)
3114                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
3115                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
3116                         return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
3117
3118                 use_efi = true;
3119
3120         } else if (r <= 0) {
3121                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to off */
3122
3123                 if (r < 0)
3124                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
3125
3126                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
3127         } else
3128                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to on */
3129                 use_efi = false;
3130
3131         r = bus_verify_polkit_async(
3132                         message,
3133                         "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
3134                         /* details= */ NULL,
3135                         &m->polkit_registry,
3136                         error);
3137         if (r < 0)
3138                 return r;
3139         if (r == 0)
3140                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3141
3142         if (use_efi) {
3143                 if (x == UINT64_MAX)
3144                         r = efi_set_variable(EFI_LOADER_VARIABLE(LoaderConfigTimeoutOneShot), NULL, 0);
3145                 else {
3146                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
3147                         xsprintf(buf, "%" PRIu64, DIV_ROUND_UP(x, USEC_PER_SEC)); /* second granularity */
3148
3149                         r = efi_set_variable_string(EFI_LOADER_VARIABLE(LoaderConfigTimeoutOneShot), buf);
3150                 }
3151                 if (r < 0)
3152                         return r;
3153         } else {
3154                 if (x == UINT64_MAX) {
3155                         if (unlink("/run/systemd/reboot-to-boot-loader-menu") < 0 && errno != ENOENT)
3156                                 return -errno;
3157                 } else {
3158                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
3159
3160                         xsprintf(buf, "%" PRIu64, x); /* μs granularity */
3161
3162                         r = write_string_file_atomic_label("/run/systemd/reboot-to-boot-loader-menu", buf);
3163                         if (r < 0)
3164                                 return r;
3165                 }
3166         }
3167
3168         return sd_bus_reply_method_return(message, NULL);
3169 }
3170
3171 static int method_can_reboot_to_boot_loader_menu(
3172                 sd_bus_message *message,
3173                 void *userdata,
3174                 sd_bus_error *error) {
3175
3176         _unused_ Manager *m = ASSERT_PTR(userdata);
3177         int r;
3178
3179         assert(message);
3180
3181         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
3182         if (r == -ENXIO) {
3183                 uint64_t features = 0;
3184
3185                 /* EFI case, let's see if booting into boot loader menu is supported. */
3186
3187                 r = efi_loader_get_features(&features);
3188                 if (r < 0)
3189                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
3190                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
3191                         return sd_bus_reply_method_return(message, "s", "na");
3192
3193         } else if (r <= 0) {
3194                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU */
3195
3196                 if (r < 0)
3197                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
3198
3199                 return sd_bus_reply_method_return(message, "s", "na");
3200         }
3201
3202         return return_test_polkit(
3203                         message,
3204                         "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
3205                         /* details= */ NULL,
3206                         /* good_user= */ UID_INVALID,
3207                         error);
3208 }
3209
3210 static int property_get_reboot_to_boot_loader_entry(
3211                 sd_bus *bus,
3212                 const char *path,
3213                 const char *interface,
3214                 const char *property,
3215                 sd_bus_message *reply,
3216                 void *userdata,
3217                 sd_bus_error *error) {
3218
3219         _cleanup_free_ char *v = NULL;
3220         Manager *m = ASSERT_PTR(userdata);
3221         const char *x = NULL;
3222         int r;
3223
3224         assert(bus);
3225         assert(reply);
3226
3227         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3228         if (r == -ENXIO) {
3229                 /* EFI case: let's read the LoaderEntryOneShot variable */
3230
3231                 r = efi_loader_update_entry_one_shot_cache(&m->efi_loader_entry_one_shot, &m->efi_loader_entry_one_shot_stat);
3232                 if (r < 0) {
3233                         if (r != -ENOENT)
3234                                 log_warning_errno(r, "Failed to read LoaderEntryOneShot variable, ignoring: %m");
3235                 } else
3236                         x = m->efi_loader_entry_one_shot;
3237
3238         } else if (r < 0)
3239                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3240         else if (r > 0) {
3241
3242                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-entry. */
3243
3244                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-entry", &v);
3245                 if (r < 0) {
3246                         if (r != -ENOENT)
3247                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-entry, ignoring: %m");
3248                 } else if (!efi_loader_entry_name_valid(v))
3249                         log_warning("/run/systemd/reboot-to-boot-loader-entry is not valid, ignoring.");
3250                 else
3251                         x = v;
3252         }
3253
3254         return sd_bus_message_append(reply, "s", x);
3255 }
3256
3257 static int boot_loader_entry_exists(Manager *m, const char *id) {
3258         _cleanup_(boot_config_free) BootConfig config = BOOT_CONFIG_NULL;
3259         int r;
3260
3261         assert(m);
3262         assert(id);
3263
3264         r = boot_config_load_auto(&config, NULL, NULL);
3265         if (r < 0 && r != -ENOKEY) /* don't complain if no GPT is found, hence skip ENOKEY */
3266                 return r;
3267
3268         r = manager_read_efi_boot_loader_entries(m);
3269         if (r >= 0)
3270                 (void) boot_config_augment_from_loader(&config, m->efi_boot_loader_entries, /* auto_only= */ true);
3271
3272         return !!boot_config_find_entry(&config, id);
3273 }
3274
3275 static int method_set_reboot_to_boot_loader_entry(
3276                 sd_bus_message *message,
3277                 void *userdata,
3278                 sd_bus_error *error) {
3279
3280         Manager *m = ASSERT_PTR(userdata);
3281         bool use_efi;
3282         const char *v;
3283         int r;
3284
3285         assert(message);
3286
3287         r = sd_bus_message_read(message, "s", &v);
3288         if (r < 0)
3289                 return r;
3290
3291         if (isempty(v))
3292                 v = NULL;
3293         else if (efi_loader_entry_name_valid(v)) {
3294                 r = boot_loader_entry_exists(m, v);
3295                 if (r < 0)
3296                         return r;
3297                 if (r == 0)
3298                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader entry '%s' is not known.", v);
3299         } else
3300                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Boot loader entry name '%s' is not valid, refusing.", v);
3301
3302         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3303         if (r == -ENXIO) {
3304                 uint64_t features;
3305
3306                 /* EFI case: let's see if booting into boot loader entry is supported. */
3307
3308                 r = efi_loader_get_features(&features);
3309                 if (r < 0)
3310                         log_warning_errno(r, "Failed to determine whether reboot into boot loader entry is supported: %m");
3311                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3312                         return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
3313
3314                 use_efi = true;
3315
3316         } else if (r <= 0) {
3317                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to off */
3318
3319                 if (r < 0)
3320                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3321
3322                 return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
3323         } else
3324                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to on */
3325                 use_efi = false;
3326
3327         r = bus_verify_polkit_async(
3328                         message,
3329                         "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3330                         /* details= */ NULL,
3331                         &m->polkit_registry,
3332                         error);
3333         if (r < 0)
3334                 return r;
3335         if (r == 0)
3336                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3337
3338         if (use_efi) {
3339                 if (isempty(v))
3340                         /* Delete item */
3341                         r = efi_set_variable(EFI_LOADER_VARIABLE(LoaderEntryOneShot), NULL, 0);
3342                 else
3343                         r = efi_set_variable_string(EFI_LOADER_VARIABLE(LoaderEntryOneShot), v);
3344                 if (r < 0)
3345                         return r;
3346         } else {
3347                 if (isempty(v)) {
3348                         if (unlink("/run/systemd/reboot-to-boot-loader-entry") < 0 && errno != ENOENT)
3349                                 return -errno;
3350                 } else {
3351                         r = write_string_file_atomic_label("/run/systemd/reboot-boot-to-loader-entry", v);
3352                         if (r < 0)
3353                                 return r;
3354                 }
3355         }
3356
3357         return sd_bus_reply_method_return(message, NULL);
3358 }
3359
3360 static int method_can_reboot_to_boot_loader_entry(
3361                 sd_bus_message *message,
3362                 void *userdata,
3363                 sd_bus_error *error) {
3364
3365         _unused_ Manager *m = ASSERT_PTR(userdata);
3366         int r;
3367
3368         assert(message);
3369
3370         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3371         if (r == -ENXIO) {
3372                 uint64_t features = 0;
3373
3374                 /* EFI case, let's see if booting into boot loader entry is supported. */
3375
3376                 r = efi_loader_get_features(&features);
3377                 if (r < 0)
3378                         log_warning_errno(r, "Failed to determine whether reboot to boot loader entry is supported: %m");
3379                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3380                         return sd_bus_reply_method_return(message, "s", "na");
3381
3382         } else if (r <= 0) {
3383                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY */
3384
3385                 if (r < 0)
3386                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3387
3388                 return sd_bus_reply_method_return(message, "s", "na");
3389         }
3390
3391         return return_test_polkit(
3392                         message,
3393                         "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3394                         /* details= */ NULL,
3395                         /* good_user= */ UID_INVALID,
3396                         error);
3397 }
3398
3399 static int property_get_boot_loader_entries(
3400                 sd_bus *bus,
3401                 const char *path,
3402                 const char *interface,
3403                 const char *property,
3404                 sd_bus_message *reply,
3405                 void *userdata,
3406                 sd_bus_error *error) {
3407
3408         _cleanup_(boot_config_free) BootConfig config = BOOT_CONFIG_NULL;
3409         Manager *m = ASSERT_PTR(userdata);
3410         size_t i;
3411         int r;
3412
3413         assert(bus);
3414         assert(reply);
3415
3416         r = boot_config_load_auto(&config, NULL, NULL);
3417         if (r < 0 && r != -ENOKEY) /* don't complain if there's no GPT found */
3418                 return r;
3419
3420         r = manager_read_efi_boot_loader_entries(m);
3421         if (r >= 0)
3422                 (void) boot_config_augment_from_loader(&config, m->efi_boot_loader_entries, /* auto_only= */ true);
3423
3424         r = sd_bus_message_open_container(reply, 'a', "s");
3425         if (r < 0)
3426                 return r;
3427
3428         for (i = 0; i < config.n_entries; i++) {
3429                 BootEntry *e = config.entries + i;
3430
3431                 r = sd_bus_message_append(reply, "s", e->id);
3432                 if (r < 0)
3433                         return r;
3434         }
3435
3436         return sd_bus_message_close_container(reply);
3437 }
3438
3439 static int method_set_wall_message(
3440                 sd_bus_message *message,
3441                 void *userdata,
3442                 sd_bus_error *error) {
3443
3444         int r;
3445         Manager *m = ASSERT_PTR(userdata);
3446         char *wall_message;
3447         int enable_wall_messages;
3448
3449         assert(message);
3450
3451         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
3452         if (r < 0)
3453                 return r;
3454
3455         if (strlen(wall_message) > WALL_MESSAGE_MAX)
3456                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3457                         "Wall message too long, maximum permitted length is %u characters.",
3458                         WALL_MESSAGE_MAX);
3459
3460         /* Short-circuit the operation if the desired state is already in place, to
3461          * avoid an unnecessary polkit permission check. */
3462         if (streq_ptr(m->wall_message, empty_to_null(wall_message)) &&
3463             m->enable_wall_messages == enable_wall_messages)
3464                 goto done;
3465
3466         r = bus_verify_polkit_async(
3467                         message,
3468                         "org.freedesktop.login1.set-wall-message",
3469                         /* details= */ NULL,
3470                         &m->polkit_registry,
3471                         error);
3472         if (r < 0)
3473                 return r;
3474         if (r == 0)
3475                 return 1; /* Will call us back */
3476
3477         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
3478         if (r < 0)
3479                 return log_oom();
3480
3481         m->enable_wall_messages = enable_wall_messages;
3482
3483  done:
3484         return sd_bus_reply_method_return(message, NULL);
3485 }
3486
3487 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3488         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3489         _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL;
3490         const char *who, *why, *what, *mode;
3491         _cleanup_free_ char *id = NULL;
3492         _cleanup_close_ int fifo_fd = -EBADF;
3493         Manager *m = ASSERT_PTR(userdata);
3494         InhibitMode mm;
3495         InhibitWhat w;
3496         uid_t uid;
3497         int r;
3498
3499         assert(message);
3500
3501         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
3502         if (r < 0)
3503                 return r;
3504
3505         w = inhibit_what_from_string(what);
3506         if (w <= 0)
3507                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3508                                          "Invalid what specification %s", what);
3509
3510         mm = inhibit_mode_from_string(mode);
3511         if (mm < 0)
3512                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3513                                          "Invalid mode specification %s", mode);
3514
3515         /* Delay is only supported for shutdown/sleep */
3516         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
3517                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3518                                          "Delay inhibitors only supported for shutdown and sleep");
3519
3520         /* Don't allow taking delay locks while we are already
3521          * executing the operation. We shouldn't create the impression
3522          * that the lock was successful if the machine is about to go
3523          * down/suspend any moment. */
3524         if (m->delayed_action && m->delayed_action->inhibit_what & w)
3525                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
3526                                          "The operation inhibition has been requested for is already running");
3527
3528         r = bus_verify_polkit_async(
3529                         message,
3530                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
3531                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
3532                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
3533                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
3534                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
3535                         w == INHIBIT_HANDLE_REBOOT_KEY    ? "org.freedesktop.login1.inhibit-handle-reboot-key" :
3536                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
3537                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
3538                         /* details= */ NULL,
3539                         &m->polkit_registry,
3540                         error);
3541         if (r < 0)
3542                 return r;
3543         if (r == 0)
3544                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3545
3546         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PIDFD, &creds);
3547         if (r < 0)
3548                 return r;
3549
3550         r = sd_bus_creds_get_euid(creds, &uid);
3551         if (r < 0)
3552                 return r;
3553
3554         r = bus_creds_get_pidref(creds, &pidref);
3555         if (r < 0)
3556                 return r;
3557
3558         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
3559                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
3560                                          "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.",
3561                                          m->inhibitors_max);
3562
3563         do {
3564                 id = mfree(id);
3565
3566                 if (asprintf(&id, "%" PRIu64, ++m->inhibit_counter) < 0)
3567                         return -ENOMEM;
3568
3569         } while (hashmap_get(m->inhibitors, id));
3570
3571         _cleanup_(inhibitor_freep) Inhibitor *i = NULL;
3572         r = manager_add_inhibitor(m, id, &i);
3573         if (r < 0)
3574                 return r;
3575
3576         i->what = w;
3577         i->mode = mm;
3578         i->pid = TAKE_PIDREF(pidref);
3579         i->uid = uid;
3580         i->why = strdup(why);
3581         i->who = strdup(who);
3582
3583         if (!i->why || !i->who)
3584                 return -ENOMEM;
3585
3586         fifo_fd = inhibitor_create_fifo(i);
3587         if (fifo_fd < 0)
3588                 return fifo_fd;
3589
3590         r = inhibitor_start(i);
3591         if (r < 0)
3592                 return r;
3593         TAKE_PTR(i);
3594
3595         return sd_bus_reply_method_return(message, "h", fifo_fd);
3596 }
3597
3598 static const sd_bus_vtable manager_vtable[] = {
3599         SD_BUS_VTABLE_START(0),
3600
3601         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", bus_property_get_bool, bus_property_set_bool, offsetof(Manager, enable_wall_messages), 0),
3602         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
3603
3604         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
3605         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
3606         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
3607         SD_BUS_PROPERTY("KillUserProcesses", "b", bus_property_get_bool, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
3608         SD_BUS_PROPERTY("RebootParameter", "s", property_get_reboot_parameter, 0, 0),
3609         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, 0),
3610         SD_BUS_PROPERTY("RebootToBootLoaderMenu", "t", property_get_reboot_to_boot_loader_menu, 0, 0),
3611         SD_BUS_PROPERTY("RebootToBootLoaderEntry", "s", property_get_reboot_to_boot_loader_entry, 0, 0),
3612         SD_BUS_PROPERTY("BootLoaderEntries", "as", property_get_boot_loader_entries, 0, SD_BUS_VTABLE_PROPERTY_CONST),
3613         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3614         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3615         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3616         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3617         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3618         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
3619         SD_BUS_PROPERTY("UserStopDelayUSec", "t", NULL, offsetof(Manager, user_stop_delay), SD_BUS_VTABLE_PROPERTY_CONST),
3620         SD_BUS_PROPERTY("SleepOperation", "as", property_get_sleep_operations, 0, SD_BUS_VTABLE_PROPERTY_CONST),
3621         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
3622         SD_BUS_PROPERTY("HandlePowerKeyLongPress", "s", property_get_handle_action, offsetof(Manager, handle_power_key_long_press), SD_BUS_VTABLE_PROPERTY_CONST),
3623         SD_BUS_PROPERTY("HandleRebootKey", "s", property_get_handle_action, offsetof(Manager, handle_reboot_key), SD_BUS_VTABLE_PROPERTY_CONST),
3624         SD_BUS_PROPERTY("HandleRebootKeyLongPress", "s", property_get_handle_action, offsetof(Manager, handle_reboot_key_long_press), SD_BUS_VTABLE_PROPERTY_CONST),
3625         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
3626         SD_BUS_PROPERTY("HandleSuspendKeyLongPress", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key_long_press), SD_BUS_VTABLE_PROPERTY_CONST),
3627         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
3628         SD_BUS_PROPERTY("HandleHibernateKeyLongPress", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key_long_press), SD_BUS_VTABLE_PROPERTY_CONST),
3629         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
3630         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
3631         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
3632         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3633         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
3634         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3635         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
3636         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
3637         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
3638         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
3639         SD_BUS_PROPERTY("LidClosed", "b", property_get_lid_closed, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3640         SD_BUS_PROPERTY("OnExternalPower", "b", property_get_on_external_power, 0, 0),
3641         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
3642         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
3643         SD_BUS_PROPERTY("RuntimeDirectoryInodesMax", "t", NULL, offsetof(Manager, runtime_dir_inodes), SD_BUS_VTABLE_PROPERTY_CONST),
3644         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
3645         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
3646         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
3647         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
3648         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
3649         SD_BUS_PROPERTY("StopIdleSessionUSec", "t", NULL, offsetof(Manager, stop_idle_session_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3650
3651         SD_BUS_METHOD_WITH_ARGS("GetSession",
3652                                 SD_BUS_ARGS("s", session_id),
3653                                 SD_BUS_RESULT("o", object_path),
3654                                 method_get_session,
3655                                 SD_BUS_VTABLE_UNPRIVILEGED),
3656         SD_BUS_METHOD_WITH_ARGS("GetSessionByPID",
3657                                 SD_BUS_ARGS("u", pid),
3658                                 SD_BUS_RESULT("o", object_path),
3659                                 method_get_session_by_pid,
3660                                 SD_BUS_VTABLE_UNPRIVILEGED),
3661         SD_BUS_METHOD_WITH_ARGS("GetUser",
3662                                 SD_BUS_ARGS("u", uid),
3663                                 SD_BUS_RESULT("o", object_path),
3664                                 method_get_user,
3665                                 SD_BUS_VTABLE_UNPRIVILEGED),
3666         SD_BUS_METHOD_WITH_ARGS("GetUserByPID",
3667                                 SD_BUS_ARGS("u", pid),
3668                                 SD_BUS_RESULT("o", object_path),
3669                                 method_get_user_by_pid,
3670                                 SD_BUS_VTABLE_UNPRIVILEGED),
3671         SD_BUS_METHOD_WITH_ARGS("GetSeat",
3672                                 SD_BUS_ARGS("s", seat_id),
3673                                 SD_BUS_RESULT("o", object_path),
3674                                 method_get_seat,
3675                                 SD_BUS_VTABLE_UNPRIVILEGED),
3676         SD_BUS_METHOD_WITH_ARGS("ListSessions",
3677                                 SD_BUS_NO_ARGS,
3678                                 SD_BUS_RESULT("a(susso)", sessions),
3679                                 method_list_sessions,
3680                                 SD_BUS_VTABLE_UNPRIVILEGED),
3681         SD_BUS_METHOD_WITH_ARGS("ListSessionsEx",
3682                                 SD_BUS_NO_ARGS,
3683                                 SD_BUS_RESULT("a(sussussbto)", sessions),
3684                                 method_list_sessions_ex,
3685                                 SD_BUS_VTABLE_UNPRIVILEGED),
3686         SD_BUS_METHOD_WITH_ARGS("ListUsers",
3687                                 SD_BUS_NO_ARGS,
3688                                 SD_BUS_RESULT("a(uso)", users),
3689                                 method_list_users,
3690                                 SD_BUS_VTABLE_UNPRIVILEGED),
3691         SD_BUS_METHOD_WITH_ARGS("ListSeats",
3692                                 SD_BUS_NO_ARGS,
3693                                 SD_BUS_RESULT("a(so)", seats),
3694                                 method_list_seats,
3695                                 SD_BUS_VTABLE_UNPRIVILEGED),
3696         SD_BUS_METHOD_WITH_ARGS("ListInhibitors",
3697                                 SD_BUS_NO_ARGS,
3698                                 SD_BUS_RESULT("a(ssssuu)", inhibitors),
3699                                 method_list_inhibitors,
3700                                 SD_BUS_VTABLE_UNPRIVILEGED),
3701         SD_BUS_METHOD_WITH_ARGS("CreateSession",
3702                                 SD_BUS_ARGS("u", uid,
3703                                             "u", pid,
3704                                             "s", service,
3705                                             "s", type,
3706                                             "s", class,
3707                                             "s", desktop,
3708                                             "s", seat_id,
3709                                             "u", vtnr,
3710                                             "s", tty,
3711                                             "s", display,
3712                                             "b", remote,
3713                                             "s", remote_user,
3714                                             "s", remote_host,
3715                                             "a(sv)", properties),
3716                                 SD_BUS_RESULT("s", session_id,
3717                                               "o", object_path,
3718                                               "s", runtime_path,
3719                                               "h", fifo_fd,
3720                                               "u", uid,
3721                                               "s", seat_id,
3722                                               "u", vtnr,
3723                                               "b", existing),
3724                                 method_create_session,
3725                                 0),
3726         SD_BUS_METHOD_WITH_ARGS("CreateSessionWithPIDFD",
3727                                 SD_BUS_ARGS("u", uid,
3728                                             "h", pidfd,
3729                                             "s", service,
3730                                             "s", type,
3731                                             "s", class,
3732                                             "s", desktop,
3733                                             "s", seat_id,
3734                                             "u", vtnr,
3735                                             "s", tty,
3736                                             "s", display,
3737                                             "b", remote,
3738                                             "s", remote_user,
3739                                             "s", remote_host,
3740                                             "t", flags,
3741                                             "a(sv)", properties),
3742                                 SD_BUS_RESULT("s", session_id,
3743                                               "o", object_path,
3744                                               "s", runtime_path,
3745                                               "h", fifo_fd,
3746                                               "u", uid,
3747                                               "s", seat_id,
3748                                               "u", vtnr,
3749                                               "b", existing),
3750                                 method_create_session_pidfd,
3751                                 0),
3752         SD_BUS_METHOD_WITH_ARGS("ReleaseSession",
3753                                 SD_BUS_ARGS("s", session_id),
3754                                 SD_BUS_NO_RESULT,
3755                                 method_release_session,
3756                                 0),
3757         SD_BUS_METHOD_WITH_ARGS("ActivateSession",
3758                                 SD_BUS_ARGS("s", session_id),
3759                                 SD_BUS_NO_RESULT,
3760                                 method_activate_session,
3761                                 SD_BUS_VTABLE_UNPRIVILEGED),
3762         SD_BUS_METHOD_WITH_ARGS("ActivateSessionOnSeat",
3763                                 SD_BUS_ARGS("s", session_id, "s", seat_id),
3764                                 SD_BUS_NO_RESULT,
3765                                 method_activate_session_on_seat,
3766                                 SD_BUS_VTABLE_UNPRIVILEGED),
3767         SD_BUS_METHOD_WITH_ARGS("LockSession",
3768                                 SD_BUS_ARGS("s", session_id),
3769                                 SD_BUS_NO_RESULT,
3770                                 method_lock_session,
3771                                 SD_BUS_VTABLE_UNPRIVILEGED),
3772         SD_BUS_METHOD_WITH_ARGS("UnlockSession",
3773                                 SD_BUS_ARGS("s", session_id),
3774                                 SD_BUS_NO_RESULT,
3775                                 method_lock_session,
3776                                 SD_BUS_VTABLE_UNPRIVILEGED),
3777         SD_BUS_METHOD("LockSessions",
3778                       NULL,
3779                       NULL,
3780                       method_lock_sessions,
3781                       SD_BUS_VTABLE_UNPRIVILEGED),
3782         SD_BUS_METHOD("UnlockSessions",
3783                       NULL,
3784                       NULL,
3785                       method_lock_sessions,
3786                       SD_BUS_VTABLE_UNPRIVILEGED),
3787         SD_BUS_METHOD_WITH_ARGS("KillSession",
3788                                 SD_BUS_ARGS("s", session_id, "s", who, "i", signal_number),
3789                                 SD_BUS_NO_RESULT,
3790                                 method_kill_session,
3791                                 SD_BUS_VTABLE_UNPRIVILEGED),
3792         SD_BUS_METHOD_WITH_ARGS("KillUser",
3793                                 SD_BUS_ARGS("u", uid, "i", signal_number),
3794                                 SD_BUS_NO_RESULT,
3795                                 method_kill_user,
3796                                 SD_BUS_VTABLE_UNPRIVILEGED),
3797         SD_BUS_METHOD_WITH_ARGS("TerminateSession",
3798                                 SD_BUS_ARGS("s", session_id),
3799                                 SD_BUS_NO_RESULT,
3800                                 method_terminate_session,
3801                                 SD_BUS_VTABLE_UNPRIVILEGED),
3802         SD_BUS_METHOD_WITH_ARGS("TerminateUser",
3803                                 SD_BUS_ARGS("u", uid),
3804                                 SD_BUS_NO_RESULT,
3805                                 method_terminate_user,
3806                                 SD_BUS_VTABLE_UNPRIVILEGED),
3807         SD_BUS_METHOD_WITH_ARGS("TerminateSeat",
3808                                 SD_BUS_ARGS("s", seat_id),
3809                                 SD_BUS_NO_RESULT,
3810                                 method_terminate_seat,
3811                                 SD_BUS_VTABLE_UNPRIVILEGED),
3812         SD_BUS_METHOD_WITH_ARGS("SetUserLinger",
3813                                 SD_BUS_ARGS("u", uid, "b", enable, "b", interactive),
3814                                 SD_BUS_NO_RESULT,
3815                                 method_set_user_linger,
3816                                 SD_BUS_VTABLE_UNPRIVILEGED),
3817         SD_BUS_METHOD_WITH_ARGS("AttachDevice",
3818                                 SD_BUS_ARGS("s", seat_id, "s", sysfs_path, "b", interactive),
3819                                 SD_BUS_NO_RESULT,
3820                                 method_attach_device,
3821                                 SD_BUS_VTABLE_UNPRIVILEGED),
3822         SD_BUS_METHOD_WITH_ARGS("FlushDevices",
3823                                 SD_BUS_ARGS("b", interactive),
3824                                 SD_BUS_NO_RESULT,
3825                                 method_flush_devices,
3826                                 SD_BUS_VTABLE_UNPRIVILEGED),
3827         SD_BUS_METHOD_WITH_ARGS("PowerOff",
3828                                 SD_BUS_ARGS("b", interactive),
3829                                 SD_BUS_NO_RESULT,
3830                                 method_poweroff,
3831                                 SD_BUS_VTABLE_UNPRIVILEGED),
3832         SD_BUS_METHOD_WITH_ARGS("PowerOffWithFlags",
3833                                 SD_BUS_ARGS("t", flags),
3834                                 SD_BUS_NO_RESULT,
3835                                 method_poweroff,
3836                                 SD_BUS_VTABLE_UNPRIVILEGED),
3837         SD_BUS_METHOD_WITH_ARGS("Reboot",
3838                                 SD_BUS_ARGS("b", interactive),
3839                                 SD_BUS_NO_RESULT,
3840                                 method_reboot,
3841                                 SD_BUS_VTABLE_UNPRIVILEGED),
3842         SD_BUS_METHOD_WITH_ARGS("RebootWithFlags",
3843                                 SD_BUS_ARGS("t", flags),
3844                                 SD_BUS_NO_RESULT,
3845                                 method_reboot,
3846                                 SD_BUS_VTABLE_UNPRIVILEGED),
3847         SD_BUS_METHOD_WITH_ARGS("Halt",
3848                                 SD_BUS_ARGS("b", interactive),
3849                                 SD_BUS_NO_RESULT,
3850                                 method_halt,
3851                                 SD_BUS_VTABLE_UNPRIVILEGED),
3852         SD_BUS_METHOD_WITH_ARGS("HaltWithFlags",
3853                                 SD_BUS_ARGS("t", flags),
3854                                 SD_BUS_NO_RESULT,
3855                                 method_halt,
3856                                 SD_BUS_VTABLE_UNPRIVILEGED),
3857         SD_BUS_METHOD_WITH_ARGS("Suspend",
3858                                 SD_BUS_ARGS("b", interactive),
3859                                 SD_BUS_NO_RESULT,
3860                                 method_suspend,
3861                                 SD_BUS_VTABLE_UNPRIVILEGED),
3862         SD_BUS_METHOD_WITH_ARGS("SuspendWithFlags",
3863                                 SD_BUS_ARGS("t", flags),
3864                                 SD_BUS_NO_RESULT,
3865                                 method_suspend,
3866                                 SD_BUS_VTABLE_UNPRIVILEGED),
3867         SD_BUS_METHOD_WITH_ARGS("Hibernate",
3868                                 SD_BUS_ARGS("b", interactive),
3869                                 SD_BUS_NO_RESULT,
3870                                 method_hibernate,
3871                                 SD_BUS_VTABLE_UNPRIVILEGED),
3872         SD_BUS_METHOD_WITH_ARGS("HibernateWithFlags",
3873                                 SD_BUS_ARGS("t", flags),
3874                                 SD_BUS_NO_RESULT,
3875                                 method_hibernate,
3876                                 SD_BUS_VTABLE_UNPRIVILEGED),
3877         SD_BUS_METHOD_WITH_ARGS("HybridSleep",
3878                                 SD_BUS_ARGS("b", interactive),
3879                                 SD_BUS_NO_RESULT,
3880                                 method_hybrid_sleep,
3881                                 SD_BUS_VTABLE_UNPRIVILEGED),
3882         SD_BUS_METHOD_WITH_ARGS("HybridSleepWithFlags",
3883                                 SD_BUS_ARGS("t", flags),
3884                                 SD_BUS_NO_RESULT,
3885                                 method_hybrid_sleep,
3886                                 SD_BUS_VTABLE_UNPRIVILEGED),
3887         SD_BUS_METHOD_WITH_ARGS("SuspendThenHibernate",
3888                                 SD_BUS_ARGS("b", interactive),
3889                                 SD_BUS_NO_RESULT,
3890                                 method_suspend_then_hibernate,
3891                                 SD_BUS_VTABLE_UNPRIVILEGED),
3892         SD_BUS_METHOD_WITH_ARGS("SuspendThenHibernateWithFlags",
3893                                 SD_BUS_ARGS("t", flags),
3894                                 SD_BUS_NO_RESULT,
3895                                 method_suspend_then_hibernate,
3896                                 SD_BUS_VTABLE_UNPRIVILEGED),
3897         SD_BUS_METHOD_WITH_ARGS("Sleep",
3898                                 SD_BUS_ARGS("t", flags),
3899                                 SD_BUS_NO_RESULT,
3900                                 method_sleep,
3901                                 SD_BUS_VTABLE_UNPRIVILEGED),
3902         SD_BUS_METHOD_WITH_ARGS("CanPowerOff",
3903                                 SD_BUS_NO_ARGS,
3904                                 SD_BUS_RESULT("s", result),
3905                                 method_can_poweroff,
3906                                 SD_BUS_VTABLE_UNPRIVILEGED),
3907         SD_BUS_METHOD_WITH_ARGS("CanReboot",
3908                                 SD_BUS_NO_ARGS,
3909                                 SD_BUS_RESULT("s", result),
3910                                 method_can_reboot,
3911                                 SD_BUS_VTABLE_UNPRIVILEGED),
3912         SD_BUS_METHOD_WITH_ARGS("CanHalt",
3913                                 SD_BUS_NO_ARGS,
3914                                 SD_BUS_RESULT("s", result),
3915                                 method_can_halt,
3916                                 SD_BUS_VTABLE_UNPRIVILEGED),
3917         SD_BUS_METHOD_WITH_ARGS("CanSuspend",
3918                                 SD_BUS_NO_ARGS,
3919                                 SD_BUS_RESULT("s", result),
3920                                 method_can_suspend,
3921                                 SD_BUS_VTABLE_UNPRIVILEGED),
3922         SD_BUS_METHOD_WITH_ARGS("CanHibernate",
3923                                 SD_BUS_NO_ARGS,
3924                                 SD_BUS_RESULT("s", result),
3925                                 method_can_hibernate,
3926                                 SD_BUS_VTABLE_UNPRIVILEGED),
3927         SD_BUS_METHOD_WITH_ARGS("CanHybridSleep",
3928                                 SD_BUS_NO_ARGS,
3929                                 SD_BUS_RESULT("s", result),
3930                                 method_can_hybrid_sleep,
3931                                 SD_BUS_VTABLE_UNPRIVILEGED),
3932         SD_BUS_METHOD_WITH_ARGS("CanSuspendThenHibernate",
3933                                 SD_BUS_NO_ARGS,
3934                                 SD_BUS_RESULT("s", result),
3935                                 method_can_suspend_then_hibernate,
3936                                 SD_BUS_VTABLE_UNPRIVILEGED),
3937         SD_BUS_METHOD_WITH_ARGS("CanSleep",
3938                                 SD_BUS_NO_ARGS,
3939                                 SD_BUS_RESULT("s", result),
3940                                 method_can_sleep,
3941                                 SD_BUS_VTABLE_UNPRIVILEGED),
3942         SD_BUS_METHOD_WITH_ARGS("ScheduleShutdown",
3943                                 SD_BUS_ARGS("s", type, "t", usec),
3944                                 SD_BUS_NO_RESULT,
3945                                 method_schedule_shutdown,
3946                                 SD_BUS_VTABLE_UNPRIVILEGED),
3947         SD_BUS_METHOD_WITH_ARGS("CancelScheduledShutdown",
3948                                 SD_BUS_NO_ARGS,
3949                                 SD_BUS_RESULT("b", cancelled),
3950                                 method_cancel_scheduled_shutdown,
3951                                 SD_BUS_VTABLE_UNPRIVILEGED),
3952         SD_BUS_METHOD_WITH_ARGS("Inhibit",
3953                                 SD_BUS_ARGS("s", what, "s", who, "s", why, "s", mode),
3954                                 SD_BUS_RESULT("h", pipe_fd),
3955                                 method_inhibit,
3956                                 SD_BUS_VTABLE_UNPRIVILEGED),
3957         SD_BUS_METHOD_WITH_ARGS("CanRebootParameter",
3958                                 SD_BUS_NO_ARGS,
3959                                 SD_BUS_RESULT("s", result),
3960                                 method_can_reboot_parameter,
3961                                 SD_BUS_VTABLE_UNPRIVILEGED),
3962         SD_BUS_METHOD_WITH_ARGS("SetRebootParameter",
3963                                 SD_BUS_ARGS("s", parameter),
3964                                 SD_BUS_NO_RESULT,
3965                                 method_set_reboot_parameter,
3966                                 SD_BUS_VTABLE_UNPRIVILEGED),
3967         SD_BUS_METHOD_WITH_ARGS("CanRebootToFirmwareSetup",
3968                                 SD_BUS_NO_ARGS,
3969                                 SD_BUS_RESULT("s", result),
3970                                 method_can_reboot_to_firmware_setup,
3971                                 SD_BUS_VTABLE_UNPRIVILEGED),
3972         SD_BUS_METHOD_WITH_ARGS("SetRebootToFirmwareSetup",
3973                                 SD_BUS_ARGS("b", enable),
3974                                 SD_BUS_NO_RESULT,
3975                                 method_set_reboot_to_firmware_setup,
3976                                 SD_BUS_VTABLE_UNPRIVILEGED),
3977         SD_BUS_METHOD_WITH_ARGS("CanRebootToBootLoaderMenu",
3978                                 SD_BUS_NO_ARGS,
3979                                 SD_BUS_RESULT("s", result),
3980                                 method_can_reboot_to_boot_loader_menu,
3981                                 SD_BUS_VTABLE_UNPRIVILEGED),
3982         SD_BUS_METHOD_WITH_ARGS("SetRebootToBootLoaderMenu",
3983                                 SD_BUS_ARGS("t", timeout),
3984                                 SD_BUS_NO_RESULT,
3985                                 method_set_reboot_to_boot_loader_menu,
3986                                 SD_BUS_VTABLE_UNPRIVILEGED),
3987         SD_BUS_METHOD_WITH_ARGS("CanRebootToBootLoaderEntry",
3988                                 SD_BUS_NO_ARGS,
3989                                 SD_BUS_RESULT("s", result),
3990                                 method_can_reboot_to_boot_loader_entry,
3991                                 SD_BUS_VTABLE_UNPRIVILEGED),
3992         SD_BUS_METHOD_WITH_ARGS("SetRebootToBootLoaderEntry",
3993                                 SD_BUS_ARGS("s", boot_loader_entry),
3994                                 SD_BUS_NO_RESULT,
3995                                 method_set_reboot_to_boot_loader_entry,
3996                                 SD_BUS_VTABLE_UNPRIVILEGED),
3997         SD_BUS_METHOD_WITH_ARGS("SetWallMessage",
3998                                 SD_BUS_ARGS("s", wall_message, "b", enable),
3999                                 SD_BUS_NO_RESULT,
4000                                 method_set_wall_message,
4001                                 SD_BUS_VTABLE_UNPRIVILEGED),
4002
4003         SD_BUS_SIGNAL_WITH_ARGS("SessionNew",
4004                                 SD_BUS_ARGS("s", session_id, "o", object_path),
4005                                 0),
4006         SD_BUS_SIGNAL_WITH_ARGS("SessionRemoved",
4007                                 SD_BUS_ARGS("s", session_id, "o", object_path),
4008                                 0),
4009         SD_BUS_SIGNAL_WITH_ARGS("UserNew",
4010                                 SD_BUS_ARGS("u", uid, "o", object_path),
4011                                 0),
4012         SD_BUS_SIGNAL_WITH_ARGS("UserRemoved",
4013                                 SD_BUS_ARGS("u", uid, "o", object_path),
4014                                 0),
4015         SD_BUS_SIGNAL_WITH_ARGS("SeatNew",
4016                                 SD_BUS_ARGS("s", seat_id, "o", object_path),
4017                                 0),
4018         SD_BUS_SIGNAL_WITH_ARGS("SeatRemoved",
4019                                 SD_BUS_ARGS("s", seat_id, "o", object_path),
4020                                 0),
4021         SD_BUS_SIGNAL_WITH_ARGS("PrepareForShutdown",
4022                                 SD_BUS_ARGS("b", start),
4023                                 0),
4024         SD_BUS_SIGNAL_WITH_ARGS("PrepareForShutdownWithMetadata",
4025                                 SD_BUS_ARGS("b", start, "a{sv}", metadata),
4026                                 0),
4027         SD_BUS_SIGNAL_WITH_ARGS("PrepareForSleep",
4028                                 SD_BUS_ARGS("b", start),
4029                                 0),
4030
4031         SD_BUS_VTABLE_END
4032 };
4033
4034 const BusObjectImplementation manager_object = {
4035         "/org/freedesktop/login1",
4036         "org.freedesktop.login1.Manager",
4037         .vtables = BUS_VTABLES(manager_vtable),
4038         .children = BUS_IMPLEMENTATIONS(&seat_object,
4039                                         &session_object,
4040                                         &user_object),
4041 };
4042
4043 static void session_jobs_reply(Session *s, uint32_t jid, const char *unit, const char *result) {
4044         assert(s);
4045         assert(unit);
4046
4047         if (!s->started)
4048                 return;
4049
4050         if (result && !streq(result, "done")) {
4051                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
4052
4053                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED,
4054                                   "Job %u for unit '%s' failed with '%s'", jid, unit, result);
4055
4056                 (void) session_send_create_reply(s, &e);
4057                 (void) session_send_upgrade_reply(s, &e);
4058                 return;
4059         }
4060
4061         (void) session_send_create_reply(s, /* error= */ NULL);
4062         (void) session_send_upgrade_reply(s, /* error= */ NULL);
4063 }
4064
4065 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
4066         Manager *m = ASSERT_PTR(userdata);
4067         const char *path, *result, *unit;
4068         uint32_t id;
4069         int r;
4070
4071         assert(message);
4072
4073         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
4074         if (r < 0) {
4075                 bus_log_parse_error(r);
4076                 return 0;
4077         }
4078
4079         if (m->action_job && streq(m->action_job, path)) {
4080                 assert(m->delayed_action);
4081                 log_info("Operation '%s' finished.", handle_action_to_string(m->delayed_action->handle));
4082
4083                 /* Tell people that they now may take a lock again */
4084                 (void) send_prepare_for(m, m->delayed_action, false);
4085
4086                 m->action_job = mfree(m->action_job);
4087                 m->delayed_action = NULL;
4088                 return 0;
4089         }
4090
4091         Session *session;
4092         User *user;
4093
4094         session = hashmap_get(m->session_units, unit);
4095         if (session) {
4096                 if (streq_ptr(path, session->scope_job)) {
4097                         session->scope_job = mfree(session->scope_job);
4098                         session_jobs_reply(session, id, unit, result);
4099
4100                         session_save(session);
4101                         user_save(session->user);
4102                 }
4103
4104                 session_add_to_gc_queue(session);
4105         }
4106
4107         user = hashmap_get(m->user_units, unit);
4108         if (user) {
4109                 /* If the user is stopping, we're tracking stop jobs here. So don't send reply. */
4110                 if (!user->stopping) {
4111                         char **user_job;
4112                         FOREACH_ARGUMENT(user_job, &user->runtime_dir_job, &user->service_manager_job)
4113                                 if (streq_ptr(path, *user_job)) {
4114                                         *user_job = mfree(*user_job);
4115
4116                                         LIST_FOREACH(sessions_by_user, s, user->sessions)
4117                                                 /* Don't propagate user service failures to the client */
4118                                                 session_jobs_reply(s, id, unit, /* error = */ NULL);
4119
4120                                         user_save(user);
4121                                         break;
4122                                 }
4123                 }
4124
4125                 user_add_to_gc_queue(user);
4126         }
4127
4128         return 0;
4129 }
4130
4131 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
4132         const char *path, *unit;
4133         Manager *m = ASSERT_PTR(userdata);
4134         Session *session;
4135         User *user;
4136         int r;
4137
4138         assert(message);
4139
4140         r = sd_bus_message_read(message, "so", &unit, &path);
4141         if (r < 0) {
4142                 bus_log_parse_error(r);
4143                 return 0;
4144         }
4145
4146         session = hashmap_get(m->session_units, unit);
4147         if (session)
4148                 session_add_to_gc_queue(session);
4149
4150         user = hashmap_get(m->user_units, unit);
4151         if (user)
4152                 user_add_to_gc_queue(user);
4153
4154         return 0;
4155 }
4156
4157 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
4158         _cleanup_free_ char *unit = NULL;
4159         Manager *m = ASSERT_PTR(userdata);
4160         const char *path;
4161         Session *session;
4162         User *user;
4163         int r;
4164
4165         assert(message);
4166
4167         path = sd_bus_message_get_path(message);
4168         if (!path)
4169                 return 0;
4170
4171         r = unit_name_from_dbus_path(path, &unit);
4172         if (r == -EINVAL) /* not a unit */
4173                 return 0;
4174         if (r < 0) {
4175                 log_oom();
4176                 return 0;
4177         }
4178
4179         session = hashmap_get(m->session_units, unit);
4180         if (session)
4181                 session_add_to_gc_queue(session);
4182
4183         user = hashmap_get(m->user_units, unit);
4184         if (user)
4185                 user_add_to_gc_queue(user);
4186
4187         return 0;
4188 }
4189
4190 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
4191         Manager *m = ASSERT_PTR(userdata);
4192         Session *session;
4193         int b, r;
4194
4195         assert(message);
4196
4197         r = sd_bus_message_read(message, "b", &b);
4198         if (r < 0) {
4199                 bus_log_parse_error(r);
4200                 return 0;
4201         }
4202
4203         if (b)
4204                 return 0;
4205
4206         /* systemd finished reloading, let's recheck all our sessions */
4207         log_debug("System manager has been reloaded, rechecking sessions...");
4208
4209         HASHMAP_FOREACH(session, m->sessions)
4210                 session_add_to_gc_queue(session);
4211
4212         return 0;
4213 }
4214
4215 int manager_send_changed(Manager *manager, const char *property, ...) {
4216         char **l;
4217
4218         assert(manager);
4219
4220         l = strv_from_stdarg_alloca(property);
4221
4222         return sd_bus_emit_properties_changed_strv(
4223                         manager->bus,
4224                         "/org/freedesktop/login1",
4225                         "org.freedesktop.login1.Manager",
4226                         l);
4227 }
4228
4229 int manager_start_scope(
4230                 Manager *manager,
4231                 const char *scope,
4232                 const PidRef *pidref,
4233                 bool allow_pidfd,
4234                 const char *slice,
4235                 const char *description,
4236                 const char * const *requires,
4237                 const char * const *extra_after,
4238                 const char *requires_mounts_for,
4239                 sd_bus_message *more_properties,
4240                 sd_bus_error *error,
4241                 char **ret_job) {
4242
4243         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
4244         int r;
4245
4246         assert(manager);
4247         assert(scope);
4248         assert(pidref_is_set(pidref));
4249         assert(ret_job);
4250
4251         r = bus_message_new_method_call(manager->bus, &m, bus_systemd_mgr, "StartTransientUnit");
4252         if (r < 0)
4253                 return r;
4254
4255         r = sd_bus_message_append(m, "ss", scope, "fail");
4256         if (r < 0)
4257                 return r;
4258
4259         r = sd_bus_message_open_container(m, 'a', "(sv)");
4260         if (r < 0)
4261                 return r;
4262
4263         if (!isempty(slice)) {
4264                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
4265                 if (r < 0)
4266                         return r;
4267         }
4268
4269         if (!isempty(description)) {
4270                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
4271                 if (r < 0)
4272                         return r;
4273         }
4274
4275         STRV_FOREACH(i, requires) {
4276                 r = sd_bus_message_append(m, "(sv)", "Requires", "as", 1, *i);
4277                 if (r < 0)
4278                         return r;
4279
4280                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, *i);
4281                 if (r < 0)
4282                         return r;
4283         }
4284
4285         STRV_FOREACH(i, extra_after) {
4286                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, *i);
4287                 if (r < 0)
4288                         return r;
4289         }
4290
4291         if (!empty_or_root(requires_mounts_for)) {
4292                 r = sd_bus_message_append(m, "(sv)", "RequiresMountsFor", "as", 1, requires_mounts_for);
4293                 if (r < 0)
4294                         return r;
4295         }
4296
4297         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
4298          * SIGTERM */
4299         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
4300         if (r < 0)
4301                 return r;
4302
4303         r = bus_append_scope_pidref(m, pidref, allow_pidfd);
4304         if (r < 0)
4305                 return r;
4306
4307         /* For login session scopes, if a process is OOM killed by the kernel, *don't* terminate the rest of
4308            the scope */
4309         r = sd_bus_message_append(m, "(sv)", "OOMPolicy", "s", "continue");
4310         if (r < 0)
4311                 return r;
4312
4313         /* disable TasksMax= for the session scope, rely on the slice setting for it */
4314         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", UINT64_MAX);
4315         if (r < 0)
4316                 return bus_log_create_error(r);
4317
4318         if (more_properties) {
4319                 /* If TasksMax also appears here, it will overwrite the default value set above */
4320                 r = sd_bus_message_copy(m, more_properties, true);
4321                 if (r < 0)
4322                         return r;
4323         }
4324
4325         r = sd_bus_message_close_container(m);
4326         if (r < 0)
4327                 return r;
4328
4329         r = sd_bus_message_append(m, "a(sa(sv))", 0);
4330         if (r < 0)
4331                 return r;
4332
4333         r = sd_bus_call(manager->bus, m, 0, error, &reply);
4334         if (r < 0) {
4335                 /* If this failed with a property we couldn't write, this is quite likely because the server
4336                  * doesn't support PIDFDs yet, let's try without. */
4337                 if (allow_pidfd &&
4338                     sd_bus_error_has_names(error, SD_BUS_ERROR_UNKNOWN_PROPERTY, SD_BUS_ERROR_PROPERTY_READ_ONLY))
4339                         return manager_start_scope(
4340                                         manager,
4341                                         scope,
4342                                         pidref,
4343                                         /* allow_pidfd = */ false,
4344                                         slice,
4345                                         description,
4346                                         requires,
4347                                         extra_after,
4348                                         requires_mounts_for,
4349                                         more_properties,
4350                                         error,
4351                                         ret_job);
4352
4353                 return r;
4354         }
4355
4356         return strdup_job(reply, ret_job);
4357 }
4358
4359 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **ret_job) {
4360         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4361         int r;
4362
4363         assert(manager);
4364         assert(unit);
4365         assert(ret_job);
4366
4367         r = bus_call_method(
4368                         manager->bus,
4369                         bus_systemd_mgr,
4370                         "StartUnit",
4371                         error,
4372                         &reply,
4373                         "ss", unit, "replace");
4374         if (r < 0)
4375                 return r;
4376
4377         return strdup_job(reply, ret_job);
4378 }
4379
4380 int manager_stop_unit(
4381                 Manager *manager,
4382                 const char *unit,
4383                 const char *job_mode,
4384                 sd_bus_error *ret_error,
4385                 char **ret_job) {
4386
4387         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4388         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4389         int r;
4390
4391         assert(manager);
4392         assert(unit);
4393         assert(ret_job);
4394
4395         r = bus_call_method(
4396                         manager->bus,
4397                         bus_systemd_mgr,
4398                         "StopUnit",
4399                         &error,
4400                         &reply,
4401                         "ss", unit, job_mode ?: "fail");
4402         if (r < 0) {
4403                 if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT, BUS_ERROR_LOAD_FAILED)) {
4404                         *ret_job = NULL;
4405                         return 0;
4406                 }
4407
4408                 sd_bus_error_move(ret_error, &error);
4409                 return r;
4410         }
4411
4412         r = strdup_job(reply, ret_job);
4413         if (r < 0)
4414                 return r;
4415
4416         return 1;
4417 }
4418
4419 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *ret_error) {
4420         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4421         _cleanup_free_ char *path = NULL;
4422         int r;
4423
4424         assert(manager);
4425         assert(scope);
4426
4427         path = unit_dbus_path_from_name(scope);
4428         if (!path)
4429                 return -ENOMEM;
4430
4431         r = sd_bus_call_method(
4432                         manager->bus,
4433                         "org.freedesktop.systemd1",
4434                         path,
4435                         "org.freedesktop.systemd1.Scope",
4436                         "Abandon",
4437                         &error,
4438                         NULL,
4439                         NULL);
4440         if (r < 0) {
4441                 if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT,
4442                                                    BUS_ERROR_LOAD_FAILED,
4443                                                    BUS_ERROR_SCOPE_NOT_RUNNING))
4444                         return 0;
4445
4446                 sd_bus_error_move(ret_error, &error);
4447                 return r;
4448         }
4449
4450         return 1;
4451 }
4452
4453 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
4454         assert(manager);
4455         assert(unit);
4456         assert(SIGNAL_VALID(signo));
4457
4458         return bus_call_method(
4459                         manager->bus,
4460                         bus_systemd_mgr,
4461                         "KillUnit",
4462                         error,
4463                         NULL,
4464                         "ssi",
4465                         unit,
4466                         who == KILL_LEADER ? "main" : "all",
4467                         signo);
4468 }
4469
4470 int manager_unit_is_active(Manager *manager, const char *unit, sd_bus_error *ret_error) {
4471         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4472         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4473         _cleanup_free_ char *path = NULL;
4474         const char *state;
4475         int r;
4476
4477         assert(manager);
4478         assert(unit);
4479
4480         path = unit_dbus_path_from_name(unit);
4481         if (!path)
4482                 return -ENOMEM;
4483
4484         r = sd_bus_get_property(
4485                         manager->bus,
4486                         "org.freedesktop.systemd1",
4487                         path,
4488                         "org.freedesktop.systemd1.Unit",
4489                         "ActiveState",
4490                         &error,
4491                         &reply,
4492                         "s");
4493         if (r < 0) {
4494                 /* systemd might have dropped off momentarily, let's
4495                  * not make this an error */
4496                 if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY,
4497                                                    SD_BUS_ERROR_DISCONNECTED))
4498                         return true;
4499
4500                 /* If the unit is already unloaded then it's not
4501                  * active */
4502                 if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT,
4503                                                    BUS_ERROR_LOAD_FAILED))
4504                         return false;
4505
4506                 sd_bus_error_move(ret_error, &error);
4507                 return r;
4508         }
4509
4510         r = sd_bus_message_read(reply, "s", &state);
4511         if (r < 0)
4512                 return r;
4513
4514         return !STR_IN_SET(state, "inactive", "failed");
4515 }
4516
4517 int manager_job_is_active(Manager *manager, const char *path, sd_bus_error *ret_error) {
4518         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4519         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4520         int r;
4521
4522         assert(manager);
4523         assert(path);
4524
4525         r = sd_bus_get_property(
4526                         manager->bus,
4527                         "org.freedesktop.systemd1",
4528                         path,
4529                         "org.freedesktop.systemd1.Job",
4530                         "State",
4531                         &error,
4532                         &reply,
4533                         "s");
4534         if (r < 0) {
4535                 if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY,
4536                                                    SD_BUS_ERROR_DISCONNECTED))
4537                         return true;
4538
4539                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
4540                         return false;
4541
4542                 sd_bus_error_move(ret_error, &error);
4543                 return r;
4544         }
4545
4546         /* We don't actually care about the state really. The fact
4547          * that we could read the job state is enough for us */
4548
4549         return true;
4550 }