src/login/logind-dbus.c

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