src/login/logind-dbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <sys/stat.h>
   5 #include <unistd.h>
   6
   7 #include "sd-device.h"
   8 #include "sd-messages.h"
   9
  10 #include "alloc-util.h"
  11 #include "audit-util.h"
  12 #include "bootspec.h"
  13 #include "bus-common-errors.h"
  14 #include "bus-error.h"
  15 #include "bus-get-properties.h"
  16 #include "bus-locator.h"
  17 #include "bus-polkit.h"
  18 #include "bus-unit-util.h"
  19 #include "bus-util.h"
  20 #include "cgroup-util.h"
  21 #include "device-util.h"
  22 #include "dirent-util.h"
  23 #include "efi-loader.h"
  24 #include "efivars.h"
  25 #include "env-util.h"
  26 #include "escape.h"
  27 #include "fd-util.h"
  28 #include "fileio-label.h"
  29 #include "fileio.h"
  30 #include "format-util.h"
  31 #include "fs-util.h"
  32 #include "logind-dbus.h"
  33 #include "logind-seat-dbus.h"
  34 #include "logind-session-dbus.h"
  35 #include "logind-user-dbus.h"
  36 #include "logind.h"
  37 #include "missing_capability.h"
  38 #include "mkdir.h"
  39 #include "parse-util.h"
  40 #include "path-util.h"
  41 #include "process-util.h"
  42 #include "reboot-util.h"
  43 #include "selinux-util.h"
  44 #include "sleep-config.h"
  45 #include "special.h"
  46 #include "stdio-util.h"
  47 #include "strv.h"
  48 #include "terminal-util.h"
  49 #include "tmpfile-util.h"
  50 #include "unit-name.h"
  51 #include "user-util.h"
  52 #include "utmp-wtmp.h"
  53 #include "virt.h"
  54
  55 static int get_sender_session(
  56                 Manager *m,
  57                 sd_bus_message *message,
  58                 bool consult_display,
  59                 sd_bus_error *error,
  60                 Session **ret) {
  61
  62         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  63         Session *session = NULL;
  64         const char *name;
  65         int r;
  66
  67         /* Acquire the sender's session. This first checks if the sending process is inside a session itself,
  68          * and returns that. If not and 'consult_display' is true, this returns the display session of the
  69          * owning user of the caller. */
  70
  71         r = sd_bus_query_sender_creds(message,
  72                                       SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT|
  73                                       (consult_display ? SD_BUS_CREDS_OWNER_UID : 0), &creds);
  74         if (r < 0)
  75                 return r;
  76
  77         r = sd_bus_creds_get_session(creds, &name);
  78         if (r < 0) {
  79                 if (r != -ENXIO)
  80                         return r;
  81
  82                 if (consult_display) {
  83                         uid_t uid;
  84
  85                         r = sd_bus_creds_get_owner_uid(creds, &uid);
  86                         if (r < 0) {
  87                                 if (r != -ENXIO)
  88                                         return r;
  89                         } else {
  90                                 User *user;
  91
  92                                 user = hashmap_get(m->users, UID_TO_PTR(uid));
  93                                 if (user)
  94                                         session = user->display;
  95                         }
  96                 }
  97         } else
  98                 session = hashmap_get(m->sessions, name);
  99
 100         if (!session)
 101                 return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
 102                                          consult_display ?
 103                                          "Caller does not belong to any known session and doesn't own any suitable session." :
 104                                          "Caller does not belong to any known session.");
 105
 106         *ret = session;
 107         return 0;
 108 }
 109
 110 int manager_get_session_from_creds(
 111                 Manager *m,
 112                 sd_bus_message *message,
 113                 const char *name,
 114                 sd_bus_error *error,
 115                 Session **ret) {
 116
 117         Session *session;
 118
 119         assert(m);
 120         assert(ret);
 121
 122         if (SEAT_IS_SELF(name)) /* the caller's own session */
 123                 return get_sender_session(m, message, false, error, ret);
 124         if (SEAT_IS_AUTO(name)) /* The caller's own session if they have one, otherwise their user's display session */
 125                 return get_sender_session(m, message, true, error, ret);
 126
 127         session = hashmap_get(m->sessions, name);
 128         if (!session)
 129                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
 130
 131         *ret = session;
 132         return 0;
 133 }
 134
 135 static int get_sender_user(Manager *m, sd_bus_message *message, sd_bus_error *error, User **ret) {
 136         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 137         uid_t uid;
 138         User *user;
 139         int r;
 140
 141         /* Note that we get the owner UID of the session, not the actual client UID here! */
 142         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 143         if (r < 0)
 144                 return r;
 145
 146         r = sd_bus_creds_get_owner_uid(creds, &uid);
 147         if (r < 0) {
 148                 if (r != -ENXIO)
 149                         return r;
 150
 151                 user = NULL;
 152         } else
 153                 user = hashmap_get(m->users, UID_TO_PTR(uid));
 154
 155         if (!user)
 156                 return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 157                                          "Caller does not belong to any logged in or lingering user");
 158
 159         *ret = user;
 160         return 0;
 161 }
 162
 163 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
 164         User *user;
 165
 166         assert(m);
 167         assert(ret);
 168
 169         if (!uid_is_valid(uid))
 170                 return get_sender_user(m, message, error, ret);
 171
 172         user = hashmap_get(m->users, UID_TO_PTR(uid));
 173         if (!user)
 174                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER,
 175                                          "User ID "UID_FMT" is not logged in or lingering", uid);
 176
 177         *ret = user;
 178         return 0;
 179 }
 180
 181 int manager_get_seat_from_creds(
 182                 Manager *m,
 183                 sd_bus_message *message,
 184                 const char *name,
 185                 sd_bus_error *error,
 186                 Seat **ret) {
 187
 188         Seat *seat;
 189         int r;
 190
 191         assert(m);
 192         assert(ret);
 193
 194         if (SEAT_IS_SELF(name) || SEAT_IS_AUTO(name)) {
 195                 Session *session;
 196
 197                 /* Use these special seat names as session names */
 198                 r = manager_get_session_from_creds(m, message, name, error, &session);
 199                 if (r < 0)
 200                         return r;
 201
 202                 seat = session->seat;
 203                 if (!seat)
 204                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session '%s' has no seat.", session->id);
 205         } else {
 206                 seat = hashmap_get(m->seats, name);
 207                 if (!seat)
 208                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 209         }
 210
 211         *ret = seat;
 212         return 0;
 213 }
 214
 215 static int return_test_polkit(
 216                 sd_bus_message *message,
 217                 int capability,
 218                 const char *action,
 219                 const char **details,
 220                 uid_t good_user,
 221                 sd_bus_error *e) {
 222
 223         const char *result;
 224         bool challenge;
 225         int r;
 226
 227         r = bus_test_polkit(message, capability, action, details, good_user, &challenge, e);
 228         if (r < 0)
 229                 return r;
 230
 231         if (r > 0)
 232                 result = "yes";
 233         else if (challenge)
 234                 result = "challenge";
 235         else
 236                 result = "no";
 237
 238         return sd_bus_reply_method_return(message, "s", result);
 239 }
 240
 241 static int property_get_idle_hint(
 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
 252         assert(bus);
 253         assert(reply);
 254         assert(m);
 255
 256         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 257 }
 258
 259 static int property_get_idle_since_hint(
 260                 sd_bus *bus,
 261                 const char *path,
 262                 const char *interface,
 263                 const char *property,
 264                 sd_bus_message *reply,
 265                 void *userdata,
 266                 sd_bus_error *error) {
 267
 268         Manager *m = userdata;
 269         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 270
 271         assert(bus);
 272         assert(reply);
 273         assert(m);
 274
 275         manager_get_idle_hint(m, &t);
 276
 277         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 278 }
 279
 280 static int property_get_inhibited(
 281                 sd_bus *bus,
 282                 const char *path,
 283                 const char *interface,
 284                 const char *property,
 285                 sd_bus_message *reply,
 286                 void *userdata,
 287                 sd_bus_error *error) {
 288
 289         Manager *m = userdata;
 290         InhibitWhat w;
 291
 292         assert(bus);
 293         assert(reply);
 294         assert(m);
 295
 296         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 297
 298         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 299 }
 300
 301 static int property_get_preparing(
 302                 sd_bus *bus,
 303                 const char *path,
 304                 const char *interface,
 305                 const char *property,
 306                 sd_bus_message *reply,
 307                 void *userdata,
 308                 sd_bus_error *error) {
 309
 310         Manager *m = userdata;
 311         bool b;
 312
 313         assert(bus);
 314         assert(reply);
 315         assert(m);
 316
 317         if (streq(property, "PreparingForShutdown"))
 318                 b = m->action_what & INHIBIT_SHUTDOWN;
 319         else
 320                 b = m->action_what & INHIBIT_SLEEP;
 321
 322         return sd_bus_message_append(reply, "b", b);
 323 }
 324
 325 static int property_get_scheduled_shutdown(
 326                 sd_bus *bus,
 327                 const char *path,
 328                 const char *interface,
 329                 const char *property,
 330                 sd_bus_message *reply,
 331                 void *userdata,
 332                 sd_bus_error *error) {
 333
 334         Manager *m = userdata;
 335         int r;
 336
 337         assert(bus);
 338         assert(reply);
 339         assert(m);
 340
 341         r = sd_bus_message_open_container(reply, 'r', "st");
 342         if (r < 0)
 343                 return r;
 344
 345         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 346         if (r < 0)
 347                 return r;
 348
 349         return sd_bus_message_close_container(reply);
 350 }
 351
 352 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 353 static BUS_DEFINE_PROPERTY_GET(property_get_docked, "b", Manager, manager_is_docked_or_external_displays);
 354 static BUS_DEFINE_PROPERTY_GET(property_get_lid_closed, "b", Manager, manager_is_lid_closed);
 355 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_on_external_power, "b", manager_is_on_external_power);
 356 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_compat_user_tasks_max, "t", CGROUP_LIMIT_MAX);
 357 static BUS_DEFINE_PROPERTY_GET_REF(property_get_hashmap_size, "t", Hashmap *, (uint64_t) hashmap_size);
 358
 359 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 360         _cleanup_free_ char *p = NULL;
 361         Manager *m = userdata;
 362         const char *name;
 363         Session *session;
 364         int r;
 365
 366         assert(message);
 367         assert(m);
 368
 369         r = sd_bus_message_read(message, "s", &name);
 370         if (r < 0)
 371                 return r;
 372
 373         r = manager_get_session_from_creds(m, message, name, error, &session);
 374         if (r < 0)
 375                 return r;
 376
 377         p = session_bus_path(session);
 378         if (!p)
 379                 return -ENOMEM;
 380
 381         return sd_bus_reply_method_return(message, "o", p);
 382 }
 383
 384 /* Get login session of a process.  This is not what you are looking for these days,
 385  * as apps may instead belong to a user service unit.  This includes terminal
 386  * emulators and hence command-line apps. */
 387 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 388         _cleanup_free_ char *p = NULL;
 389         Session *session = NULL;
 390         Manager *m = userdata;
 391         pid_t pid;
 392         int r;
 393
 394         assert(message);
 395         assert(m);
 396
 397         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 398
 399         r = sd_bus_message_read(message, "u", &pid);
 400         if (r < 0)
 401                 return r;
 402         if (pid < 0)
 403                 return -EINVAL;
 404
 405         if (pid == 0) {
 406                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 407                 if (r < 0)
 408                         return r;
 409         } else {
 410                 r = manager_get_session_by_pid(m, pid, &session);
 411                 if (r < 0)
 412                         return r;
 413
 414                 if (!session)
 415                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
 416                                                  "PID "PID_FMT" does not belong to any known session", pid);
 417         }
 418
 419         p = session_bus_path(session);
 420         if (!p)
 421                 return -ENOMEM;
 422
 423         return sd_bus_reply_method_return(message, "o", p);
 424 }
 425
 426 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 427         _cleanup_free_ char *p = NULL;
 428         Manager *m = userdata;
 429         uint32_t uid;
 430         User *user;
 431         int r;
 432
 433         assert(message);
 434         assert(m);
 435
 436         r = sd_bus_message_read(message, "u", &uid);
 437         if (r < 0)
 438                 return r;
 439
 440         r = manager_get_user_from_creds(m, message, uid, error, &user);
 441         if (r < 0)
 442                 return r;
 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_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 452         _cleanup_free_ char *p = NULL;
 453         Manager *m = userdata;
 454         User *user = NULL;
 455         pid_t pid;
 456         int r;
 457
 458         assert(message);
 459         assert(m);
 460
 461         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 462
 463         r = sd_bus_message_read(message, "u", &pid);
 464         if (r < 0)
 465                 return r;
 466         if (pid < 0)
 467                 return -EINVAL;
 468
 469         if (pid == 0) {
 470                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 471                 if (r < 0)
 472                         return r;
 473         } else {
 474                 r = manager_get_user_by_pid(m, pid, &user);
 475                 if (r < 0)
 476                         return r;
 477                 if (!user)
 478                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 479                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 480                                                  pid);
 481         }
 482
 483         p = user_bus_path(user);
 484         if (!p)
 485                 return -ENOMEM;
 486
 487         return sd_bus_reply_method_return(message, "o", p);
 488 }
 489
 490 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 491         _cleanup_free_ char *p = NULL;
 492         Manager *m = userdata;
 493         const char *name;
 494         Seat *seat;
 495         int r;
 496
 497         assert(message);
 498         assert(m);
 499
 500         r = sd_bus_message_read(message, "s", &name);
 501         if (r < 0)
 502                 return r;
 503
 504         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 505         if (r < 0)
 506                 return r;
 507
 508         p = seat_bus_path(seat);
 509         if (!p)
 510                 return -ENOMEM;
 511
 512         return sd_bus_reply_method_return(message, "o", p);
 513 }
 514
 515 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 516         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 517         Manager *m = userdata;
 518         Session *session;
 519         int r;
 520
 521         assert(message);
 522         assert(m);
 523
 524         r = sd_bus_message_new_method_return(message, &reply);
 525         if (r < 0)
 526                 return r;
 527
 528         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 529         if (r < 0)
 530                 return r;
 531
 532         HASHMAP_FOREACH(session, m->sessions) {
 533                 _cleanup_free_ char *p = NULL;
 534
 535                 p = session_bus_path(session);
 536                 if (!p)
 537                         return -ENOMEM;
 538
 539                 r = sd_bus_message_append(reply, "(susso)",
 540                                           session->id,
 541                                           (uint32_t) session->user->user_record->uid,
 542                                           session->user->user_record->user_name,
 543                                           session->seat ? session->seat->id : "",
 544                                           p);
 545                 if (r < 0)
 546                         return r;
 547         }
 548
 549         r = sd_bus_message_close_container(reply);
 550         if (r < 0)
 551                 return r;
 552
 553         return sd_bus_send(NULL, reply, NULL);
 554 }
 555
 556 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 557         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 558         Manager *m = userdata;
 559         User *user;
 560         int r;
 561
 562         assert(message);
 563         assert(m);
 564
 565         r = sd_bus_message_new_method_return(message, &reply);
 566         if (r < 0)
 567                 return r;
 568
 569         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 570         if (r < 0)
 571                 return r;
 572
 573         HASHMAP_FOREACH(user, m->users) {
 574                 _cleanup_free_ char *p = NULL;
 575
 576                 p = user_bus_path(user);
 577                 if (!p)
 578                         return -ENOMEM;
 579
 580                 r = sd_bus_message_append(reply, "(uso)",
 581                                           (uint32_t) user->user_record->uid,
 582                                           user->user_record->user_name,
 583                                           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_seats(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         Seat *seat;
 599         int r;
 600
 601         assert(message);
 602         assert(m);
 603
 604         r = sd_bus_message_new_method_return(message, &reply);
 605         if (r < 0)
 606                 return r;
 607
 608         r = sd_bus_message_open_container(reply, 'a', "(so)");
 609         if (r < 0)
 610                 return r;
 611
 612         HASHMAP_FOREACH(seat, m->seats) {
 613                 _cleanup_free_ char *p = NULL;
 614
 615                 p = seat_bus_path(seat);
 616                 if (!p)
 617                         return -ENOMEM;
 618
 619                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 620                 if (r < 0)
 621                         return r;
 622         }
 623
 624         r = sd_bus_message_close_container(reply);
 625         if (r < 0)
 626                 return r;
 627
 628         return sd_bus_send(NULL, reply, NULL);
 629 }
 630
 631 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 632         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 633         Manager *m = userdata;
 634         Inhibitor *inhibitor;
 635         int r;
 636
 637         assert(message);
 638         assert(m);
 639
 640         r = sd_bus_message_new_method_return(message, &reply);
 641         if (r < 0)
 642                 return r;
 643
 644         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 645         if (r < 0)
 646                 return r;
 647
 648         HASHMAP_FOREACH(inhibitor, m->inhibitors) {
 649
 650                 r = sd_bus_message_append(reply, "(ssssuu)",
 651                                           strempty(inhibit_what_to_string(inhibitor->what)),
 652                                           strempty(inhibitor->who),
 653                                           strempty(inhibitor->why),
 654                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 655                                           (uint32_t) inhibitor->uid,
 656                                           (uint32_t) inhibitor->pid);
 657                 if (r < 0)
 658                         return r;
 659         }
 660
 661         r = sd_bus_message_close_container(reply);
 662         if (r < 0)
 663                 return r;
 664
 665         return sd_bus_send(NULL, reply, NULL);
 666 }
 667
 668 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 669         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 670         _cleanup_free_ char *id = NULL;
 671         Session *session = NULL;
 672         uint32_t audit_id = 0;
 673         Manager *m = userdata;
 674         User *user = NULL;
 675         Seat *seat = NULL;
 676         pid_t leader;
 677         uid_t uid;
 678         int remote;
 679         uint32_t vtnr = 0;
 680         SessionType t;
 681         SessionClass c;
 682         int r;
 683
 684         assert(message);
 685         assert(m);
 686
 687         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 688         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 689
 690         r = sd_bus_message_read(message, "uusssssussbss",
 691                                 &uid, &leader, &service, &type, &class, &desktop, &cseat,
 692                                 &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 693         if (r < 0)
 694                 return r;
 695
 696         if (!uid_is_valid(uid))
 697                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 698         if (leader < 0 || leader == 1 || leader == getpid_cached())
 699                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 700
 701         if (isempty(type))
 702                 t = _SESSION_TYPE_INVALID;
 703         else {
 704                 t = session_type_from_string(type);
 705                 if (t < 0)
 706                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 707                                                  "Invalid session type %s", type);
 708         }
 709
 710         if (isempty(class))
 711                 c = _SESSION_CLASS_INVALID;
 712         else {
 713                 c = session_class_from_string(class);
 714                 if (c < 0)
 715                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 716                                                  "Invalid session class %s", class);
 717         }
 718
 719         if (isempty(desktop))
 720                 desktop = NULL;
 721         else {
 722                 if (!string_is_safe(desktop))
 723                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 724                                                  "Invalid desktop string %s", desktop);
 725         }
 726
 727         if (isempty(cseat))
 728                 seat = NULL;
 729         else {
 730                 seat = hashmap_get(m->seats, cseat);
 731                 if (!seat)
 732                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT,
 733                                                  "No seat '%s' known", cseat);
 734         }
 735
 736         if (tty_is_vc(tty)) {
 737                 int v;
 738
 739                 if (!seat)
 740                         seat = m->seat0;
 741                 else if (seat != m->seat0)
 742                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 743                                                  "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 744
 745                 v = vtnr_from_tty(tty);
 746                 if (v <= 0)
 747                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 748                                                  "Cannot determine VT number from virtual console TTY %s", tty);
 749
 750                 if (vtnr == 0)
 751                         vtnr = (uint32_t) v;
 752                 else if (vtnr != (uint32_t) v)
 753                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 754                                                  "Specified TTY and VT number do not match");
 755
 756         } else if (tty_is_console(tty)) {
 757
 758                 if (!seat)
 759                         seat = m->seat0;
 760                 else if (seat != m->seat0)
 761                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 762                                                  "Console TTY specified but seat is not seat0");
 763
 764                 if (vtnr != 0)
 765                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 766                                                  "Console TTY specified but VT number is not 0");
 767         }
 768
 769         if (seat) {
 770                 if (seat_has_vts(seat)) {
 771                         if (vtnr <= 0 || vtnr > 63)
 772                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 773                                                          "VT number out of range");
 774                 } else {
 775                         if (vtnr != 0)
 776                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 777                                                          "Seat has no VTs but VT number not 0");
 778                 }
 779         }
 780
 781         if (t == _SESSION_TYPE_INVALID) {
 782                 if (!isempty(display))
 783                         t = SESSION_X11;
 784                 else if (!isempty(tty))
 785                         t = SESSION_TTY;
 786                 else
 787                         t = SESSION_UNSPECIFIED;
 788         }
 789
 790         if (c == _SESSION_CLASS_INVALID) {
 791                 if (t == SESSION_UNSPECIFIED)
 792                         c = SESSION_BACKGROUND;
 793                 else
 794                         c = SESSION_USER;
 795         }
 796
 797         if (leader == 0) {
 798                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 799
 800                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 801                 if (r < 0)
 802                         return r;
 803
 804                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 805                 if (r < 0)
 806                         return r;
 807         }
 808
 809         /* Check if we are already in a logind session. Or if we are in user@.service
 810          * which is a special PAM session that avoids creating a logind session. */
 811         r = manager_get_user_by_pid(m, leader, NULL);
 812         if (r < 0)
 813                 return r;
 814         if (r > 0)
 815                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY,
 816                                          "Already running in a session or user slice");
 817
 818         /*
 819          * Old gdm and lightdm start the user-session on the same VT as
 820          * the greeter session. But they destroy the greeter session
 821          * after the user-session and want the user-session to take
 822          * over the VT. We need to support this for
 823          * backwards-compatibility, so make sure we allow new sessions
 824          * on a VT that a greeter is running on. Furthermore, to allow
 825          * re-logins, we have to allow a greeter to take over a used VT for
 826          * the exact same reasons.
 827          */
 828         if (c != SESSION_GREETER &&
 829             vtnr > 0 &&
 830             vtnr < m->seat0->position_count &&
 831             m->seat0->positions[vtnr] &&
 832             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 833                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 834
 835         if (hashmap_size(m->sessions) >= m->sessions_max)
 836                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
 837                                          "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.",
 838                                          m->sessions_max);
 839
 840         (void) audit_session_from_pid(leader, &audit_id);
 841         if (audit_session_is_valid(audit_id)) {
 842                 /* Keep our session IDs and the audit session IDs in sync */
 843
 844                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 845                         return -ENOMEM;
 846
 847                 /* Wut? There's already a session by this name and we didn't find it above? Weird, then let's
 848                  * not trust the audit data and let's better register a new ID */
 849                 if (hashmap_contains(m->sessions, id)) {
 850                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 851                         audit_id = AUDIT_SESSION_INVALID;
 852                         id = mfree(id);
 853                 }
 854         }
 855
 856         if (!id) {
 857                 do {
 858                         id = mfree(id);
 859
 860                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 861                                 return -ENOMEM;
 862
 863                 } while (hashmap_contains(m->sessions, id));
 864         }
 865
 866         /* The generated names should not clash with 'auto' or 'self' */
 867         assert(!SESSION_IS_SELF(id));
 868         assert(!SESSION_IS_AUTO(id));
 869
 870         /* If we are not watching utmp already, try again */
 871         manager_reconnect_utmp(m);
 872
 873         r = manager_add_user_by_uid(m, uid, &user);
 874         if (r < 0)
 875                 goto fail;
 876
 877         r = manager_add_session(m, id, &session);
 878         if (r < 0)
 879                 goto fail;
 880
 881         session_set_user(session, user);
 882         r = session_set_leader(session, leader);
 883         if (r < 0)
 884                 goto fail;
 885
 886         session->original_type = session->type = t;
 887         session->class = c;
 888         session->remote = remote;
 889         session->vtnr = vtnr;
 890
 891         if (!isempty(tty)) {
 892                 session->tty = strdup(tty);
 893                 if (!session->tty) {
 894                         r = -ENOMEM;
 895                         goto fail;
 896                 }
 897
 898                 session->tty_validity = TTY_FROM_PAM;
 899         }
 900
 901         if (!isempty(display)) {
 902                 session->display = strdup(display);
 903                 if (!session->display) {
 904                         r = -ENOMEM;
 905                         goto fail;
 906                 }
 907         }
 908
 909         if (!isempty(remote_user)) {
 910                 session->remote_user = strdup(remote_user);
 911                 if (!session->remote_user) {
 912                         r = -ENOMEM;
 913                         goto fail;
 914                 }
 915         }
 916
 917         if (!isempty(remote_host)) {
 918                 session->remote_host = strdup(remote_host);
 919                 if (!session->remote_host) {
 920                         r = -ENOMEM;
 921                         goto fail;
 922                 }
 923         }
 924
 925         if (!isempty(service)) {
 926                 session->service = strdup(service);
 927                 if (!session->service) {
 928                         r = -ENOMEM;
 929                         goto fail;
 930                 }
 931         }
 932
 933         if (!isempty(desktop)) {
 934                 session->desktop = strdup(desktop);
 935                 if (!session->desktop) {
 936                         r = -ENOMEM;
 937                         goto fail;
 938                 }
 939         }
 940
 941         if (seat) {
 942                 r = seat_attach_session(seat, session);
 943                 if (r < 0)
 944                         goto fail;
 945         }
 946
 947         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 948         if (r < 0)
 949                 goto fail;
 950
 951         r = session_start(session, message, error);
 952         if (r < 0)
 953                 goto fail;
 954
 955         r = sd_bus_message_exit_container(message);
 956         if (r < 0)
 957                 goto fail;
 958
 959         session->create_message = sd_bus_message_ref(message);
 960
 961         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 962          * session_send_create_reply(). */
 963
 964         return 1;
 965
 966 fail:
 967         if (session)
 968                 session_add_to_gc_queue(session);
 969
 970         if (user)
 971                 user_add_to_gc_queue(user);
 972
 973         return r;
 974 }
 975
 976 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 977         Manager *m = userdata;
 978         Session *session;
 979         const char *name;
 980         int r;
 981
 982         assert(message);
 983         assert(m);
 984
 985         r = sd_bus_message_read(message, "s", &name);
 986         if (r < 0)
 987                 return r;
 988
 989         r = manager_get_session_from_creds(m, message, name, error, &session);
 990         if (r < 0)
 991                 return r;
 992
 993         r = session_release(session);
 994         if (r < 0)
 995                 return r;
 996
 997         return sd_bus_reply_method_return(message, NULL);
 998 }
 999
1000 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1001         Manager *m = userdata;
1002         Session *session;
1003         const char *name;
1004         int r;
1005
1006         assert(message);
1007         assert(m);
1008
1009         r = sd_bus_message_read(message, "s", &name);
1010         if (r < 0)
1011                 return r;
1012
1013         r = manager_get_session_from_creds(m, message, name, error, &session);
1014         if (r < 0)
1015                 return r;
1016
1017         /* PolicyKit is done by bus_session_method_activate() */
1018
1019         return bus_session_method_activate(message, session, error);
1020 }
1021
1022 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1023         const char *session_name, *seat_name;
1024         Manager *m = userdata;
1025         Session *session;
1026         Seat *seat;
1027         int r;
1028
1029         assert(message);
1030         assert(m);
1031
1032         /* Same as ActivateSession() but refuses to work if the seat doesn't match */
1033
1034         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
1035         if (r < 0)
1036                 return r;
1037
1038         r = manager_get_session_from_creds(m, message, session_name, error, &session);
1039         if (r < 0)
1040                 return r;
1041
1042         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
1043         if (r < 0)
1044                 return r;
1045
1046         if (session->seat != seat)
1047                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT,
1048                                          "Session %s not on seat %s", session_name, seat_name);
1049
1050         r = bus_verify_polkit_async(
1051                         message,
1052                         CAP_SYS_ADMIN,
1053                         "org.freedesktop.login1.chvt",
1054                         NULL,
1055                         false,
1056                         UID_INVALID,
1057                         &m->polkit_registry,
1058                         error);
1059         if (r < 0)
1060                 return r;
1061         if (r == 0)
1062                 return 1; /* Will call us back */
1063
1064         r = session_activate(session);
1065         if (r < 0)
1066                 return r;
1067
1068         return sd_bus_reply_method_return(message, NULL);
1069 }
1070
1071 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1072         Manager *m = userdata;
1073         Session *session;
1074         const char *name;
1075         int r;
1076
1077         assert(message);
1078         assert(m);
1079
1080         r = sd_bus_message_read(message, "s", &name);
1081         if (r < 0)
1082                 return r;
1083
1084         r = manager_get_session_from_creds(m, message, name, error, &session);
1085         if (r < 0)
1086                 return r;
1087
1088         return bus_session_method_lock(message, session, error);
1089 }
1090
1091 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1092         Manager *m = userdata;
1093         int r;
1094
1095         assert(message);
1096         assert(m);
1097
1098         r = bus_verify_polkit_async(
1099                         message,
1100                         CAP_SYS_ADMIN,
1101                         "org.freedesktop.login1.lock-sessions",
1102                         NULL,
1103                         false,
1104                         UID_INVALID,
1105                         &m->polkit_registry,
1106                         error);
1107         if (r < 0)
1108                 return r;
1109         if (r == 0)
1110                 return 1; /* Will call us back */
1111
1112         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1113         if (r < 0)
1114                 return r;
1115
1116         return sd_bus_reply_method_return(message, NULL);
1117 }
1118
1119 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1120         const char *name;
1121         Manager *m = userdata;
1122         Session *session;
1123         int r;
1124
1125         assert(message);
1126         assert(m);
1127
1128         r = sd_bus_message_read(message, "s", &name);
1129         if (r < 0)
1130                 return r;
1131
1132         r = manager_get_session_from_creds(m, message, name, error, &session);
1133         if (r < 0)
1134                 return r;
1135
1136         return bus_session_method_kill(message, session, error);
1137 }
1138
1139 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1140         Manager *m = userdata;
1141         uint32_t uid;
1142         User *user;
1143         int r;
1144
1145         assert(message);
1146         assert(m);
1147
1148         r = sd_bus_message_read(message, "u", &uid);
1149         if (r < 0)
1150                 return r;
1151
1152         r = manager_get_user_from_creds(m, message, uid, error, &user);
1153         if (r < 0)
1154                 return r;
1155
1156         return bus_user_method_kill(message, user, error);
1157 }
1158
1159 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1160         Manager *m = userdata;
1161         const char *name;
1162         Session *session;
1163         int r;
1164
1165         assert(message);
1166         assert(m);
1167
1168         r = sd_bus_message_read(message, "s", &name);
1169         if (r < 0)
1170                 return r;
1171
1172         r = manager_get_session_from_creds(m, message, name, error, &session);
1173         if (r < 0)
1174                 return r;
1175
1176         return bus_session_method_terminate(message, session, error);
1177 }
1178
1179 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1180         Manager *m = userdata;
1181         uint32_t uid;
1182         User *user;
1183         int r;
1184
1185         assert(message);
1186         assert(m);
1187
1188         r = sd_bus_message_read(message, "u", &uid);
1189         if (r < 0)
1190                 return r;
1191
1192         r = manager_get_user_from_creds(m, message, uid, error, &user);
1193         if (r < 0)
1194                 return r;
1195
1196         return bus_user_method_terminate(message, user, error);
1197 }
1198
1199 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1200         Manager *m = userdata;
1201         const char *name;
1202         Seat *seat;
1203         int r;
1204
1205         assert(message);
1206         assert(m);
1207
1208         r = sd_bus_message_read(message, "s", &name);
1209         if (r < 0)
1210                 return r;
1211
1212         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1213         if (r < 0)
1214                 return r;
1215
1216         return bus_seat_method_terminate(message, seat, error);
1217 }
1218
1219 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1220         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1221         _cleanup_free_ char *cc = NULL;
1222         Manager *m = userdata;
1223         int r, b, interactive;
1224         struct passwd *pw;
1225         const char *path;
1226         uint32_t uid, auth_uid;
1227
1228         assert(message);
1229         assert(m);
1230
1231         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1232         if (r < 0)
1233                 return r;
1234
1235         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1236                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1237         if (r < 0)
1238                 return r;
1239
1240         if (!uid_is_valid(uid)) {
1241                 /* Note that we get the owner UID of the session or user unit,
1242                  * not the actual client UID here! */
1243                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1244                 if (r < 0)
1245                         return r;
1246         }
1247
1248         /* owner_uid is racy, so for authorization we must use euid */
1249         r = sd_bus_creds_get_euid(creds, &auth_uid);
1250         if (r < 0)
1251                 return r;
1252
1253         errno = 0;
1254         pw = getpwuid(uid);
1255         if (!pw)
1256                 return errno_or_else(ENOENT);
1257
1258         r = bus_verify_polkit_async(
1259                         message,
1260                         CAP_SYS_ADMIN,
1261                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1262                                           "org.freedesktop.login1.set-user-linger",
1263                         NULL,
1264                         interactive,
1265                         UID_INVALID,
1266                         &m->polkit_registry,
1267                         error);
1268         if (r < 0)
1269                 return r;
1270         if (r == 0)
1271                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1272
1273         (void) mkdir_p_label("/var/lib/systemd", 0755);
1274         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1275         if (r < 0)
1276                 return r;
1277
1278         cc = cescape(pw->pw_name);
1279         if (!cc)
1280                 return -ENOMEM;
1281
1282         path = strjoina("/var/lib/systemd/linger/", cc);
1283         if (b) {
1284                 User *u;
1285
1286                 r = touch(path);
1287                 if (r < 0)
1288                         return r;
1289
1290                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1291                         user_start(u);
1292
1293         } else {
1294                 User *u;
1295
1296                 r = unlink(path);
1297                 if (r < 0 && errno != ENOENT)
1298                         return -errno;
1299
1300                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1301                 if (u)
1302                         user_add_to_gc_queue(u);
1303         }
1304
1305         return sd_bus_reply_method_return(message, NULL);
1306 }
1307
1308 static int trigger_device(Manager *m, sd_device *d) {
1309         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
1310         int r;
1311
1312         assert(m);
1313
1314         r = sd_device_enumerator_new(&e);
1315         if (r < 0)
1316                 return r;
1317
1318         r = sd_device_enumerator_allow_uninitialized(e);
1319         if (r < 0)
1320                 return r;
1321
1322         if (d) {
1323                 r = sd_device_enumerator_add_match_parent(e, d);
1324                 if (r < 0)
1325                         return r;
1326         }
1327
1328         FOREACH_DEVICE(e, d) {
1329                 _cleanup_free_ char *t = NULL;
1330                 const char *p;
1331
1332                 r = sd_device_get_syspath(d, &p);
1333                 if (r < 0)
1334                         return r;
1335
1336                 t = path_join(p, "uevent");
1337                 if (!t)
1338                         return -ENOMEM;
1339
1340                 (void) write_string_file(t, "change", WRITE_STRING_FILE_DISABLE_BUFFER);
1341         }
1342
1343         return 0;
1344 }
1345
1346 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1347         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
1348         _cleanup_free_ char *rule = NULL, *file = NULL;
1349         const char *id_for_seat;
1350         int r;
1351
1352         assert(m);
1353         assert(seat);
1354         assert(sysfs);
1355
1356         r = sd_device_new_from_syspath(&d, sysfs);
1357         if (r < 0)
1358                 return r;
1359
1360         if (sd_device_has_current_tag(d, "seat") <= 0)
1361                 return -ENODEV;
1362
1363         if (sd_device_get_property_value(d, "ID_FOR_SEAT", &id_for_seat) < 0)
1364                 return -ENODEV;
1365
1366         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1367                 return -ENOMEM;
1368
1369         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1370                 return -ENOMEM;
1371
1372         (void) mkdir_p_label("/etc/udev/rules.d", 0755);
1373         r = write_string_file_atomic_label(file, rule);
1374         if (r < 0)
1375                 return r;
1376
1377         return trigger_device(m, d);
1378 }
1379
1380 static int flush_devices(Manager *m) {
1381         _cleanup_closedir_ DIR *d;
1382
1383         assert(m);
1384
1385         d = opendir("/etc/udev/rules.d");
1386         if (!d) {
1387                 if (errno != ENOENT)
1388                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1389         } else {
1390                 struct dirent *de;
1391
1392                 FOREACH_DIRENT_ALL(de, d, break) {
1393                         dirent_ensure_type(d, de);
1394                         if (!dirent_is_file(de))
1395                                 continue;
1396
1397                         if (!startswith(de->d_name, "72-seat-"))
1398                                 continue;
1399
1400                         if (!endswith(de->d_name, ".rules"))
1401                                 continue;
1402
1403                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1404                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1405                 }
1406         }
1407
1408         return trigger_device(m, NULL);
1409 }
1410
1411 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1412         const char *sysfs, *seat;
1413         Manager *m = userdata;
1414         int interactive, r;
1415
1416         assert(message);
1417         assert(m);
1418
1419         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1420         if (r < 0)
1421                 return r;
1422
1423         if (!path_is_normalized(sysfs))
1424                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not normalized", sysfs);
1425         if (!path_startswith(sysfs, "/sys"))
1426                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1427
1428         if (SEAT_IS_SELF(seat) || SEAT_IS_AUTO(seat)) {
1429                 Seat *found;
1430
1431                 r = manager_get_seat_from_creds(m, message, seat, error, &found);
1432                 if (r < 0)
1433                         return r;
1434
1435                 seat = found->id;
1436
1437         } else if (!seat_name_is_valid(seat)) /* Note that a seat does not have to exist yet for this operation to succeed */
1438                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat name %s is not valid", seat);
1439
1440         r = bus_verify_polkit_async(
1441                         message,
1442                         CAP_SYS_ADMIN,
1443                         "org.freedesktop.login1.attach-device",
1444                         NULL,
1445                         interactive,
1446                         UID_INVALID,
1447                         &m->polkit_registry,
1448                         error);
1449         if (r < 0)
1450                 return r;
1451         if (r == 0)
1452                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1453
1454         r = attach_device(m, seat, sysfs);
1455         if (r < 0)
1456                 return r;
1457
1458         return sd_bus_reply_method_return(message, NULL);
1459 }
1460
1461 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1462         Manager *m = userdata;
1463         int interactive, r;
1464
1465         assert(message);
1466         assert(m);
1467
1468         r = sd_bus_message_read(message, "b", &interactive);
1469         if (r < 0)
1470                 return r;
1471
1472         r = bus_verify_polkit_async(
1473                         message,
1474                         CAP_SYS_ADMIN,
1475                         "org.freedesktop.login1.flush-devices",
1476                         NULL,
1477                         interactive,
1478                         UID_INVALID,
1479                         &m->polkit_registry,
1480                         error);
1481         if (r < 0)
1482                 return r;
1483         if (r == 0)
1484                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1485
1486         r = flush_devices(m);
1487         if (r < 0)
1488                 return r;
1489
1490         return sd_bus_reply_method_return(message, NULL);
1491 }
1492
1493 static int have_multiple_sessions(
1494                 Manager *m,
1495                 uid_t uid) {
1496
1497         Session *session;
1498
1499         assert(m);
1500
1501         /* Check for other users' sessions. Greeter sessions do not
1502          * count, and non-login sessions do not count either. */
1503         HASHMAP_FOREACH(session, m->sessions)
1504                 if (session->class == SESSION_USER &&
1505                     session->user->user_record->uid != uid)
1506                         return true;
1507
1508         return false;
1509 }
1510
1511 static int bus_manager_log_shutdown(
1512                 Manager *m,
1513                 const char *unit_name) {
1514
1515         const char *p, *q;
1516
1517         assert(m);
1518         assert(unit_name);
1519
1520         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1521                 p = "MESSAGE=System is powering down";
1522                 q = "SHUTDOWN=power-off";
1523         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1524                 p = "MESSAGE=System is rebooting";
1525                 q = "SHUTDOWN=reboot";
1526         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1527                 p = "MESSAGE=System is halting";
1528                 q = "SHUTDOWN=halt";
1529         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1530                 p = "MESSAGE=System is rebooting with kexec";
1531                 q = "SHUTDOWN=kexec";
1532         } else {
1533                 p = "MESSAGE=System is shutting down";
1534                 q = NULL;
1535         }
1536
1537         if (isempty(m->wall_message))
1538                 p = strjoina(p, ".");
1539         else
1540                 p = strjoina(p, " (", m->wall_message, ").");
1541
1542         return log_struct(LOG_NOTICE,
1543                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1544                           p,
1545                           q);
1546 }
1547
1548 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1549         Manager *m = userdata;
1550
1551         assert(e);
1552         assert(m);
1553
1554         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1555         return 0;
1556 }
1557
1558 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1559         int r;
1560
1561         assert(m);
1562
1563         if (until <= now(CLOCK_MONOTONIC))
1564                 return 0;
1565
1566         /* We want to ignore the lid switch for a while after each
1567          * suspend, and after boot-up. Hence let's install a timer for
1568          * this. As long as the event source exists we ignore the lid
1569          * switch. */
1570
1571         if (m->lid_switch_ignore_event_source) {
1572                 usec_t u;
1573
1574                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1575                 if (r < 0)
1576                         return r;
1577
1578                 if (until <= u)
1579                         return 0;
1580
1581                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1582         } else
1583                 r = sd_event_add_time(
1584                                 m->event,
1585                                 &m->lid_switch_ignore_event_source,
1586                                 CLOCK_MONOTONIC,
1587                                 until, 0,
1588                                 lid_switch_ignore_handler, m);
1589
1590         return r;
1591 }
1592
1593 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1594         int active = _active;
1595
1596         assert(m);
1597         assert(IN_SET(w, INHIBIT_SHUTDOWN, INHIBIT_SLEEP));
1598
1599         return sd_bus_emit_signal(m->bus,
1600                                   "/org/freedesktop/login1",
1601                                   "org.freedesktop.login1.Manager",
1602                                   w == INHIBIT_SHUTDOWN ? "PrepareForShutdown" : "PrepareForSleep",
1603                                   "b",
1604                                   active);
1605 }
1606
1607 static int execute_shutdown_or_sleep(
1608                 Manager *m,
1609                 InhibitWhat w,
1610                 const char *unit_name,
1611                 sd_bus_error *error) {
1612
1613         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1614         const char *p;
1615         int r;
1616
1617         assert(m);
1618         assert(w > 0);
1619         assert(w < _INHIBIT_WHAT_MAX);
1620         assert(unit_name);
1621
1622         if (w == INHIBIT_SHUTDOWN)
1623                 bus_manager_log_shutdown(m, unit_name);
1624
1625         r = bus_call_method(
1626                         m->bus,
1627                         bus_systemd_mgr,
1628                         "StartUnit",
1629                         error,
1630                         &reply,
1631                         "ss", unit_name, "replace-irreversibly");
1632         if (r < 0)
1633                 goto error;
1634
1635         r = sd_bus_message_read(reply, "o", &p);
1636         if (r < 0)
1637                 goto error;
1638
1639         r = free_and_strdup(&m->action_job, p);
1640         if (r < 0)
1641                 goto error;
1642
1643         m->action_unit = unit_name;
1644         m->action_what = w;
1645
1646         /* Make sure the lid switch is ignored for a while */
1647         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1648
1649         return 0;
1650
1651 error:
1652         /* Tell people that they now may take a lock again */
1653         (void) send_prepare_for(m, w, false);
1654
1655         return r;
1656 }
1657
1658 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1659
1660         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1661         Inhibitor *offending = NULL;
1662         int r;
1663
1664         assert(manager);
1665
1666         if (manager->action_what == 0 || manager->action_job)
1667                 return 0;
1668
1669         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1670                 _cleanup_free_ char *comm = NULL, *u = NULL;
1671
1672                 if (!timeout)
1673                         return 0;
1674
1675                 (void) get_process_comm(offending->pid, &comm);
1676                 u = uid_to_name(offending->uid);
1677
1678                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1679                            offending->uid, strna(u),
1680                            offending->pid, strna(comm));
1681         }
1682
1683         /* Actually do the operation */
1684         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1685         if (r < 0) {
1686                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1687                             bus_error_message(&error, r));
1688
1689                 manager->action_unit = NULL;
1690                 manager->action_what = 0;
1691                 return r;
1692         }
1693
1694         return 1;
1695 }
1696
1697 static int manager_inhibit_timeout_handler(
1698                         sd_event_source *s,
1699                         uint64_t usec,
1700                         void *userdata) {
1701
1702         Manager *manager = userdata;
1703         int r;
1704
1705         assert(manager);
1706         assert(manager->inhibit_timeout_source == s);
1707
1708         r = manager_dispatch_delayed(manager, true);
1709         return (r < 0) ? r : 0;
1710 }
1711
1712 static int delay_shutdown_or_sleep(
1713                 Manager *m,
1714                 InhibitWhat w,
1715                 const char *unit_name) {
1716
1717         int r;
1718
1719         assert(m);
1720         assert(w >= 0);
1721         assert(w < _INHIBIT_WHAT_MAX);
1722         assert(unit_name);
1723
1724         if (m->inhibit_timeout_source) {
1725                 r = sd_event_source_set_time_relative(m->inhibit_timeout_source, m->inhibit_delay_max);
1726                 if (r < 0)
1727                         return log_error_errno(r, "sd_event_source_set_time_relative() failed: %m");
1728
1729                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1730                 if (r < 0)
1731                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1732         } else {
1733                 r = sd_event_add_time_relative(
1734                                 m->event,
1735                                 &m->inhibit_timeout_source,
1736                                 CLOCK_MONOTONIC, m->inhibit_delay_max, 0,
1737                                 manager_inhibit_timeout_handler, m);
1738                 if (r < 0)
1739                         return r;
1740         }
1741
1742         m->action_unit = unit_name;
1743         m->action_what = w;
1744
1745         return 0;
1746 }
1747
1748 int bus_manager_shutdown_or_sleep_now_or_later(
1749                 Manager *m,
1750                 const char *unit_name,
1751                 InhibitWhat w,
1752                 sd_bus_error *error) {
1753
1754         _cleanup_free_ char *load_state = NULL;
1755         bool delayed;
1756         int r;
1757
1758         assert(m);
1759         assert(unit_name);
1760         assert(w > 0);
1761         assert(w < _INHIBIT_WHAT_MAX);
1762         assert(!m->action_job);
1763
1764         r = unit_load_state(m->bus, unit_name, &load_state);
1765         if (r < 0)
1766                 return r;
1767
1768         if (!streq(load_state, "loaded"))
1769                 return log_notice_errno(SYNTHETIC_ERRNO(EACCES),
1770                                         "Unit %s is %s, refusing operation.",
1771                                         unit_name, load_state);
1772
1773         /* Tell everybody to prepare for shutdown/sleep */
1774         (void) send_prepare_for(m, w, true);
1775
1776         delayed =
1777                 m->inhibit_delay_max > 0 &&
1778                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1779
1780         if (delayed)
1781                 /* Shutdown is delayed, keep in mind what we
1782                  * want to do, and start a timeout */
1783                 r = delay_shutdown_or_sleep(m, w, unit_name);
1784         else
1785                 /* Shutdown is not delayed, execute it
1786                  * immediately */
1787                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1788
1789         return r;
1790 }
1791
1792 static int verify_shutdown_creds(
1793                 Manager *m,
1794                 sd_bus_message *message,
1795                 InhibitWhat w,
1796                 bool interactive,
1797                 const char *action,
1798                 const char *action_multiple_sessions,
1799                 const char *action_ignore_inhibit,
1800                 sd_bus_error *error) {
1801
1802         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1803         bool multiple_sessions, blocked;
1804         uid_t uid;
1805         int r;
1806
1807         assert(m);
1808         assert(message);
1809         assert(w >= 0);
1810         assert(w <= _INHIBIT_WHAT_MAX);
1811
1812         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1813         if (r < 0)
1814                 return r;
1815
1816         r = sd_bus_creds_get_euid(creds, &uid);
1817         if (r < 0)
1818                 return r;
1819
1820         r = have_multiple_sessions(m, uid);
1821         if (r < 0)
1822                 return r;
1823
1824         multiple_sessions = r > 0;
1825         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1826
1827         if (multiple_sessions && action_multiple_sessions) {
1828                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1829                 if (r < 0)
1830                         return r;
1831                 if (r == 0)
1832                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1833         }
1834
1835         if (blocked && action_ignore_inhibit) {
1836                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1837                 if (r < 0)
1838                         return r;
1839                 if (r == 0)
1840                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1841         }
1842
1843         if (!multiple_sessions && !blocked && action) {
1844                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1845                 if (r < 0)
1846                         return r;
1847                 if (r == 0)
1848                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1849         }
1850
1851         return 0;
1852 }
1853
1854 static int method_do_shutdown_or_sleep(
1855                 Manager *m,
1856                 sd_bus_message *message,
1857                 const char *unit_name,
1858                 InhibitWhat w,
1859                 const char *action,
1860                 const char *action_multiple_sessions,
1861                 const char *action_ignore_inhibit,
1862                 const char *sleep_verb,
1863                 sd_bus_error *error) {
1864
1865         int interactive, r;
1866
1867         assert(m);
1868         assert(message);
1869         assert(unit_name);
1870         assert(w >= 0);
1871         assert(w <= _INHIBIT_WHAT_MAX);
1872
1873         r = sd_bus_message_read(message, "b", &interactive);
1874         if (r < 0)
1875                 return r;
1876
1877         /* Don't allow multiple jobs being executed at the same time */
1878         if (m->action_what > 0)
1879                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
1880                                          "There's already a shutdown or sleep operation in progress");
1881
1882         if (sleep_verb) {
1883                 r = can_sleep(sleep_verb);
1884                 if (r == -ENOSPC)
1885                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1886                                                 "Not enough swap space for hibernation");
1887                 if (r == 0)
1888                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1889                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1890                 if (r < 0)
1891                         return r;
1892         }
1893
1894         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1895                                   action_ignore_inhibit, error);
1896         if (r != 0)
1897                 return r;
1898
1899         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1900         if (r < 0)
1901                 return r;
1902
1903         return sd_bus_reply_method_return(message, NULL);
1904 }
1905
1906 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1907         Manager *m = userdata;
1908
1909         return method_do_shutdown_or_sleep(
1910                         m, message,
1911                         SPECIAL_POWEROFF_TARGET,
1912                         INHIBIT_SHUTDOWN,
1913                         "org.freedesktop.login1.power-off",
1914                         "org.freedesktop.login1.power-off-multiple-sessions",
1915                         "org.freedesktop.login1.power-off-ignore-inhibit",
1916                         NULL,
1917                         error);
1918 }
1919
1920 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1921         Manager *m = userdata;
1922
1923         return method_do_shutdown_or_sleep(
1924                         m, message,
1925                         SPECIAL_REBOOT_TARGET,
1926                         INHIBIT_SHUTDOWN,
1927                         "org.freedesktop.login1.reboot",
1928                         "org.freedesktop.login1.reboot-multiple-sessions",
1929                         "org.freedesktop.login1.reboot-ignore-inhibit",
1930                         NULL,
1931                         error);
1932 }
1933
1934 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1935         Manager *m = userdata;
1936
1937         return method_do_shutdown_or_sleep(
1938                         m, message,
1939                         SPECIAL_HALT_TARGET,
1940                         INHIBIT_SHUTDOWN,
1941                         "org.freedesktop.login1.halt",
1942                         "org.freedesktop.login1.halt-multiple-sessions",
1943                         "org.freedesktop.login1.halt-ignore-inhibit",
1944                         NULL,
1945                         error);
1946 }
1947
1948 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1949         Manager *m = userdata;
1950
1951         return method_do_shutdown_or_sleep(
1952                         m, message,
1953                         SPECIAL_SUSPEND_TARGET,
1954                         INHIBIT_SLEEP,
1955                         "org.freedesktop.login1.suspend",
1956                         "org.freedesktop.login1.suspend-multiple-sessions",
1957                         "org.freedesktop.login1.suspend-ignore-inhibit",
1958                         "suspend",
1959                         error);
1960 }
1961
1962 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1963         Manager *m = userdata;
1964
1965         return method_do_shutdown_or_sleep(
1966                         m, message,
1967                         SPECIAL_HIBERNATE_TARGET,
1968                         INHIBIT_SLEEP,
1969                         "org.freedesktop.login1.hibernate",
1970                         "org.freedesktop.login1.hibernate-multiple-sessions",
1971                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1972                         "hibernate",
1973                         error);
1974 }
1975
1976 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1977         Manager *m = userdata;
1978
1979         return method_do_shutdown_or_sleep(
1980                         m, message,
1981                         SPECIAL_HYBRID_SLEEP_TARGET,
1982                         INHIBIT_SLEEP,
1983                         "org.freedesktop.login1.hibernate",
1984                         "org.freedesktop.login1.hibernate-multiple-sessions",
1985                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1986                         "hybrid-sleep",
1987                         error);
1988 }
1989
1990 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1991         Manager *m = userdata;
1992
1993         return method_do_shutdown_or_sleep(
1994                         m, message,
1995                         SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
1996                         INHIBIT_SLEEP,
1997                         "org.freedesktop.login1.hibernate",
1998                         "org.freedesktop.login1.hibernate-multiple-sessions",
1999                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2000                         "hybrid-sleep",
2001                         error);
2002 }
2003
2004 static int nologin_timeout_handler(
2005                         sd_event_source *s,
2006                         uint64_t usec,
2007                         void *userdata) {
2008
2009         Manager *m = userdata;
2010
2011         log_info("Creating /run/nologin, blocking further logins...");
2012
2013         m->unlink_nologin =
2014                 create_shutdown_run_nologin_or_warn() >= 0;
2015
2016         return 0;
2017 }
2018
2019 static int update_schedule_file(Manager *m) {
2020         _cleanup_free_ char *temp_path = NULL;
2021         _cleanup_fclose_ FILE *f = NULL;
2022         int r;
2023
2024         assert(m);
2025
2026         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
2027         if (r < 0)
2028                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
2029
2030         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
2031         if (r < 0)
2032                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
2033
2034         (void) fchmod(fileno(f), 0644);
2035
2036         fprintf(f,
2037                 "USEC="USEC_FMT"\n"
2038                 "WARN_WALL=%i\n"
2039                 "MODE=%s\n",
2040                 m->scheduled_shutdown_timeout,
2041                 m->enable_wall_messages,
2042                 m->scheduled_shutdown_type);
2043
2044         if (!isempty(m->wall_message)) {
2045                 _cleanup_free_ char *t;
2046
2047                 t = cescape(m->wall_message);
2048                 if (!t) {
2049                         r = -ENOMEM;
2050                         goto fail;
2051                 }
2052
2053                 fprintf(f, "WALL_MESSAGE=%s\n", t);
2054         }
2055
2056         r = fflush_and_check(f);
2057         if (r < 0)
2058                 goto fail;
2059
2060         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2061                 r = -errno;
2062                 goto fail;
2063         }
2064
2065         return 0;
2066
2067 fail:
2068         (void) unlink(temp_path);
2069         (void) unlink("/run/systemd/shutdown/scheduled");
2070
2071         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2072 }
2073
2074 static void reset_scheduled_shutdown(Manager *m) {
2075         assert(m);
2076
2077         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2078         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
2079         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
2080
2081         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
2082         m->scheduled_shutdown_timeout = 0;
2083         m->shutdown_dry_run = false;
2084
2085         if (m->unlink_nologin) {
2086                 (void) unlink_or_warn("/run/nologin");
2087                 m->unlink_nologin = false;
2088         }
2089
2090         (void) unlink("/run/systemd/shutdown/scheduled");
2091 }
2092
2093 static int manager_scheduled_shutdown_handler(
2094                         sd_event_source *s,
2095                         uint64_t usec,
2096                         void *userdata) {
2097
2098         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2099         Manager *m = userdata;
2100         const char *target;
2101         int r;
2102
2103         assert(m);
2104
2105         if (isempty(m->scheduled_shutdown_type))
2106                 return 0;
2107
2108         if (streq(m->scheduled_shutdown_type, "poweroff"))
2109                 target = SPECIAL_POWEROFF_TARGET;
2110         else if (streq(m->scheduled_shutdown_type, "reboot"))
2111                 target = SPECIAL_REBOOT_TARGET;
2112         else if (streq(m->scheduled_shutdown_type, "halt"))
2113                 target = SPECIAL_HALT_TARGET;
2114         else
2115                 assert_not_reached("unexpected shutdown type");
2116
2117         /* Don't allow multiple jobs being executed at the same time */
2118         if (m->action_what > 0) {
2119                 r = -EALREADY;
2120                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2121                 goto error;
2122         }
2123
2124         if (m->shutdown_dry_run) {
2125                 /* We do not process delay inhibitors here.  Otherwise, we
2126                  * would have to be considered "in progress" (like the check
2127                  * above) for some seconds after our admin has seen the final
2128                  * wall message. */
2129
2130                 bus_manager_log_shutdown(m, target);
2131                 log_info("Running in dry run, suppressing action.");
2132                 reset_scheduled_shutdown(m);
2133
2134                 return 0;
2135         }
2136
2137         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2138         if (r < 0) {
2139                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2140                 goto error;
2141         }
2142
2143         return 0;
2144
2145 error:
2146         reset_scheduled_shutdown(m);
2147         return r;
2148 }
2149
2150 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2151         Manager *m = userdata;
2152         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2153         const char *action_multiple_sessions = NULL;
2154         const char *action_ignore_inhibit = NULL;
2155         const char *action = NULL;
2156         uint64_t elapse;
2157         char *type;
2158         int r;
2159         bool dry_run = false;
2160
2161         assert(m);
2162         assert(message);
2163
2164         r = sd_bus_message_read(message, "st", &type, &elapse);
2165         if (r < 0)
2166                 return r;
2167
2168         if (startswith(type, "dry-")) {
2169                 type += 4;
2170                 dry_run = true;
2171         }
2172
2173         if (streq(type, "poweroff")) {
2174                 action = "org.freedesktop.login1.power-off";
2175                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2176                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2177         } else if (streq(type, "reboot")) {
2178                 action = "org.freedesktop.login1.reboot";
2179                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2180                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2181         } else if (streq(type, "halt")) {
2182                 action = "org.freedesktop.login1.halt";
2183                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2184                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2185         } else
2186                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2187
2188         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2189                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2190         if (r != 0)
2191                 return r;
2192
2193         if (m->scheduled_shutdown_timeout_source) {
2194                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2195                 if (r < 0)
2196                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2197
2198                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2199                 if (r < 0)
2200                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2201         } else {
2202                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2203                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2204                 if (r < 0)
2205                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2206         }
2207
2208         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2209         if (r < 0) {
2210                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2211                 return log_oom();
2212         }
2213
2214         m->shutdown_dry_run = dry_run;
2215
2216         if (m->nologin_timeout_source) {
2217                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2218                 if (r < 0)
2219                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2220
2221                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2222                 if (r < 0)
2223                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2224         } else {
2225                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2226                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2227                 if (r < 0)
2228                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2229         }
2230
2231         m->scheduled_shutdown_timeout = elapse;
2232
2233         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2234         if (r >= 0) {
2235                 const char *tty = NULL;
2236
2237                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2238                 (void) sd_bus_creds_get_tty(creds, &tty);
2239
2240                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2241                 if (r < 0) {
2242                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2243                         return log_oom();
2244                 }
2245         }
2246
2247         r = manager_setup_wall_message_timer(m);
2248         if (r < 0)
2249                 return r;
2250
2251         r = update_schedule_file(m);
2252         if (r < 0)
2253                 return r;
2254
2255         return sd_bus_reply_method_return(message, NULL);
2256 }
2257
2258 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2259         Manager *m = userdata;
2260         bool cancelled;
2261
2262         assert(m);
2263         assert(message);
2264
2265         cancelled = m->scheduled_shutdown_type != NULL;
2266         reset_scheduled_shutdown(m);
2267
2268         if (cancelled && m->enable_wall_messages) {
2269                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2270                 _cleanup_free_ char *username = NULL;
2271                 const char *tty = NULL;
2272                 uid_t uid = 0;
2273                 int r;
2274
2275                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2276                 if (r >= 0) {
2277                         (void) sd_bus_creds_get_uid(creds, &uid);
2278                         (void) sd_bus_creds_get_tty(creds, &tty);
2279                 }
2280
2281                 username = uid_to_name(uid);
2282                 utmp_wall("The system shutdown has been cancelled",
2283                           username, tty, logind_wall_tty_filter, m);
2284         }
2285
2286         return sd_bus_reply_method_return(message, "b", cancelled);
2287 }
2288
2289 static int method_can_shutdown_or_sleep(
2290                 Manager *m,
2291                 sd_bus_message *message,
2292                 InhibitWhat w,
2293                 const char *action,
2294                 const char *action_multiple_sessions,
2295                 const char *action_ignore_inhibit,
2296                 const char *sleep_verb,
2297                 sd_bus_error *error) {
2298
2299         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2300         HandleAction handle;
2301         bool multiple_sessions, challenge, blocked;
2302         const char *result = NULL;
2303         uid_t uid;
2304         int r;
2305
2306         assert(m);
2307         assert(message);
2308         assert(w >= 0);
2309         assert(w <= _INHIBIT_WHAT_MAX);
2310         assert(action);
2311         assert(action_multiple_sessions);
2312         assert(action_ignore_inhibit);
2313
2314         if (sleep_verb) {
2315                 r = can_sleep(sleep_verb);
2316                 if (IN_SET(r,  0, -ENOSPC))
2317                         return sd_bus_reply_method_return(message, "s", "na");
2318                 if (r < 0)
2319                         return r;
2320         }
2321
2322         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2323         if (r < 0)
2324                 return r;
2325
2326         r = sd_bus_creds_get_euid(creds, &uid);
2327         if (r < 0)
2328                 return r;
2329
2330         r = have_multiple_sessions(m, uid);
2331         if (r < 0)
2332                 return r;
2333
2334         multiple_sessions = r > 0;
2335         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2336
2337         handle = handle_action_from_string(sleep_verb);
2338         if (handle >= 0) {
2339                 const char *target;
2340
2341                 target = manager_target_for_action(handle);
2342                 if (target) {
2343                         _cleanup_free_ char *load_state = NULL;
2344
2345                         r = unit_load_state(m->bus, target, &load_state);
2346                         if (r < 0)
2347                                 return r;
2348
2349                         if (!streq(load_state, "loaded")) {
2350                                 result = "no";
2351                                 goto finish;
2352                         }
2353                 }
2354         }
2355
2356         if (multiple_sessions) {
2357                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2358                 if (r < 0)
2359                         return r;
2360
2361                 if (r > 0)
2362                         result = "yes";
2363                 else if (challenge)
2364                         result = "challenge";
2365                 else
2366                         result = "no";
2367         }
2368
2369         if (blocked) {
2370                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2371                 if (r < 0)
2372                         return r;
2373
2374                 if (r > 0) {
2375                         if (!result)
2376                                 result = "yes";
2377                 } else if (challenge) {
2378                         if (!result || streq(result, "yes"))
2379                                 result = "challenge";
2380                 } else
2381                         result = "no";
2382         }
2383
2384         if (!multiple_sessions && !blocked) {
2385                 /* If neither inhibit nor multiple sessions
2386                  * apply then just check the normal policy */
2387
2388                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2389                 if (r < 0)
2390                         return r;
2391
2392                 if (r > 0)
2393                         result = "yes";
2394                 else if (challenge)
2395                         result = "challenge";
2396                 else
2397                         result = "no";
2398         }
2399
2400  finish:
2401         return sd_bus_reply_method_return(message, "s", result);
2402 }
2403
2404 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2405         Manager *m = userdata;
2406
2407         return method_can_shutdown_or_sleep(
2408                         m, message,
2409                         INHIBIT_SHUTDOWN,
2410                         "org.freedesktop.login1.power-off",
2411                         "org.freedesktop.login1.power-off-multiple-sessions",
2412                         "org.freedesktop.login1.power-off-ignore-inhibit",
2413                         NULL,
2414                         error);
2415 }
2416
2417 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2418         Manager *m = userdata;
2419
2420         return method_can_shutdown_or_sleep(
2421                         m, message,
2422                         INHIBIT_SHUTDOWN,
2423                         "org.freedesktop.login1.reboot",
2424                         "org.freedesktop.login1.reboot-multiple-sessions",
2425                         "org.freedesktop.login1.reboot-ignore-inhibit",
2426                         NULL,
2427                         error);
2428 }
2429
2430 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2431         Manager *m = userdata;
2432
2433         return method_can_shutdown_or_sleep(
2434                         m, message,
2435                         INHIBIT_SHUTDOWN,
2436                         "org.freedesktop.login1.halt",
2437                         "org.freedesktop.login1.halt-multiple-sessions",
2438                         "org.freedesktop.login1.halt-ignore-inhibit",
2439                         NULL,
2440                         error);
2441 }
2442
2443 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2444         Manager *m = userdata;
2445
2446         return method_can_shutdown_or_sleep(
2447                         m, message,
2448                         INHIBIT_SLEEP,
2449                         "org.freedesktop.login1.suspend",
2450                         "org.freedesktop.login1.suspend-multiple-sessions",
2451                         "org.freedesktop.login1.suspend-ignore-inhibit",
2452                         "suspend",
2453                         error);
2454 }
2455
2456 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2457         Manager *m = userdata;
2458
2459         return method_can_shutdown_or_sleep(
2460                         m, message,
2461                         INHIBIT_SLEEP,
2462                         "org.freedesktop.login1.hibernate",
2463                         "org.freedesktop.login1.hibernate-multiple-sessions",
2464                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2465                         "hibernate",
2466                         error);
2467 }
2468
2469 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2470         Manager *m = userdata;
2471
2472         return method_can_shutdown_or_sleep(
2473                         m, message,
2474                         INHIBIT_SLEEP,
2475                         "org.freedesktop.login1.hibernate",
2476                         "org.freedesktop.login1.hibernate-multiple-sessions",
2477                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2478                         "hybrid-sleep",
2479                         error);
2480 }
2481
2482 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2483         Manager *m = userdata;
2484
2485         return method_can_shutdown_or_sleep(
2486                         m, message,
2487                         INHIBIT_SLEEP,
2488                         "org.freedesktop.login1.hibernate",
2489                         "org.freedesktop.login1.hibernate-multiple-sessions",
2490                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2491                         "suspend-then-hibernate",
2492                         error);
2493 }
2494
2495 static int property_get_reboot_parameter(
2496                 sd_bus *bus,
2497                 const char *path,
2498                 const char *interface,
2499                 const char *property,
2500                 sd_bus_message *reply,
2501                 void *userdata,
2502                 sd_bus_error *error) {
2503         _cleanup_free_ char *parameter = NULL;
2504         int r;
2505
2506         assert(bus);
2507         assert(reply);
2508         assert(userdata);
2509
2510         r = read_reboot_parameter(&parameter);
2511         if (r < 0)
2512                 return r;
2513
2514         return sd_bus_message_append(reply, "s", parameter);
2515 }
2516
2517 static int method_set_reboot_parameter(
2518                 sd_bus_message *message,
2519                 void *userdata,
2520                 sd_bus_error *error) {
2521
2522         Manager *m = userdata;
2523         const char *arg;
2524         int r;
2525
2526         assert(message);
2527         assert(m);
2528
2529         r = sd_bus_message_read(message, "s", &arg);
2530         if (r < 0)
2531                 return r;
2532
2533         r = detect_container();
2534         if (r < 0)
2535                 return r;
2536         if (r > 0)
2537                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
2538                                          "Reboot parameter not supported in containers, refusing.");
2539
2540         r = bus_verify_polkit_async(message,
2541                                     CAP_SYS_ADMIN,
2542                                     "org.freedesktop.login1.set-reboot-parameter",
2543                                     NULL,
2544                                     false,
2545                                     UID_INVALID,
2546                                     &m->polkit_registry,
2547                                     error);
2548         if (r < 0)
2549                 return r;
2550         if (r == 0)
2551                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2552
2553         r = update_reboot_parameter_and_warn(arg, false);
2554         if (r < 0)
2555                 return r;
2556
2557         return sd_bus_reply_method_return(message, NULL);
2558 }
2559
2560 static int method_can_reboot_parameter(
2561                 sd_bus_message *message,
2562                 void *userdata,
2563                 sd_bus_error *error) {
2564
2565         _unused_ Manager *m = userdata;
2566         int r;
2567
2568         assert(message);
2569         assert(m);
2570
2571         r = detect_container();
2572         if (r < 0)
2573                 return r;
2574         if (r > 0) /* Inside containers, specifying a reboot parameter, doesn't make much sense */
2575                 return sd_bus_reply_method_return(message, "s", "na");
2576
2577         return return_test_polkit(
2578                         message,
2579                         CAP_SYS_ADMIN,
2580                         "org.freedesktop.login1.set-reboot-parameter",
2581                         NULL,
2582                         UID_INVALID,
2583                         error);
2584 }
2585
2586 static int property_get_reboot_to_firmware_setup(
2587                 sd_bus *bus,
2588                 const char *path,
2589                 const char *interface,
2590                 const char *property,
2591                 sd_bus_message *reply,
2592                 void *userdata,
2593                 sd_bus_error *error) {
2594         int r;
2595
2596         assert(bus);
2597         assert(reply);
2598         assert(userdata);
2599
2600         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2601         if (r == -ENXIO) {
2602                 /* EFI case: let's see what is currently configured in the EFI variables */
2603                 r = efi_get_reboot_to_firmware();
2604                 if (r < 0 && r != -EOPNOTSUPP)
2605                         log_warning_errno(r, "Failed to determine reboot-to-firmware-setup state: %m");
2606         } else if (r < 0)
2607                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2608         else if (r > 0) {
2609                 /* Non-EFI case: let's see whether /run/systemd/reboot-to-firmware-setup exists. */
2610                 if (access("/run/systemd/reboot-to-firmware-setup", F_OK) < 0) {
2611                         if (errno != ENOENT)
2612                                 log_warning_errno(errno, "Failed to check whether /run/systemd/reboot-to-firmware-setup exists: %m");
2613
2614                         r = false;
2615                 } else
2616                         r = true;
2617         }
2618
2619         return sd_bus_message_append(reply, "b", r > 0);
2620 }
2621
2622 static int method_set_reboot_to_firmware_setup(
2623                 sd_bus_message *message,
2624                 void *userdata,
2625                 sd_bus_error *error) {
2626
2627         Manager *m = userdata;
2628         bool use_efi;
2629         int b, r;
2630
2631         assert(message);
2632         assert(m);
2633
2634         r = sd_bus_message_read(message, "b", &b);
2635         if (r < 0)
2636                 return r;
2637
2638         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2639         if (r == -ENXIO) {
2640                 /* EFI case: let's see what the firmware supports */
2641
2642                 r = efi_reboot_to_firmware_supported();
2643                 if (r == -EOPNOTSUPP)
2644                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2645                 if (r < 0)
2646                         return r;
2647
2648                 use_efi = true;
2649
2650         } else if (r <= 0) {
2651                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to off */
2652
2653                 if (r < 0)
2654                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2655
2656                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2657         } else
2658                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to on */
2659                 use_efi = false;
2660
2661         r = bus_verify_polkit_async(message,
2662                                     CAP_SYS_ADMIN,
2663                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2664                                     NULL,
2665                                     false,
2666                                     UID_INVALID,
2667                                     &m->polkit_registry,
2668                                     error);
2669         if (r < 0)
2670                 return r;
2671         if (r == 0)
2672                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2673
2674         if (use_efi) {
2675                 r = efi_set_reboot_to_firmware(b);
2676                 if (r < 0)
2677                         return r;
2678         } else {
2679                 if (b) {
2680                         r = touch("/run/systemd/reboot-to-firmware-setup");
2681                         if (r < 0)
2682                                 return r;
2683                 } else {
2684                         if (unlink("/run/systemd/reboot-to-firmware-setup") < 0 && errno != ENOENT)
2685                                 return -errno;
2686                 }
2687         }
2688
2689         return sd_bus_reply_method_return(message, NULL);
2690 }
2691
2692 static int method_can_reboot_to_firmware_setup(
2693                 sd_bus_message *message,
2694                 void *userdata,
2695                 sd_bus_error *error) {
2696
2697         _unused_ Manager *m = userdata;
2698         int r;
2699
2700         assert(message);
2701         assert(m);
2702
2703         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2704         if (r == -ENXIO) {
2705                 /* EFI case: let's see what the firmware supports */
2706
2707                 r = efi_reboot_to_firmware_supported();
2708                 if (r < 0) {
2709                         if (r != -EOPNOTSUPP)
2710                                 log_warning_errno(r, "Failed to determine whether reboot to firmware is supported: %m");
2711
2712                         return sd_bus_reply_method_return(message, "s", "na");
2713                 }
2714
2715         } else if (r <= 0) {
2716                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP */
2717
2718                 if (r < 0)
2719                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2720
2721                 return sd_bus_reply_method_return(message, "s", "na");
2722         }
2723
2724         return return_test_polkit(
2725                         message,
2726                         CAP_SYS_ADMIN,
2727                         "org.freedesktop.login1.set-reboot-to-firmware-setup",
2728                         NULL,
2729                         UID_INVALID,
2730                         error);
2731 }
2732
2733 static int property_get_reboot_to_boot_loader_menu(
2734                 sd_bus *bus,
2735                 const char *path,
2736                 const char *interface,
2737                 const char *property,
2738                 sd_bus_message *reply,
2739                 void *userdata,
2740                 sd_bus_error *error) {
2741
2742         uint64_t x = UINT64_MAX;
2743         int r;
2744
2745         assert(bus);
2746         assert(reply);
2747         assert(userdata);
2748
2749         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2750         if (r == -ENXIO) {
2751                 /* EFI case: returns the current value of LoaderConfigTimeoutOneShot. Three cases are distuingished:
2752                  *
2753                  *     1. Variable not set, boot into boot loader menu is not enabled (we return UINT64_MAX to the user)
2754                  *     2. Variable set to "0", boot into boot loader menu is enabled with no timeout (we return 0 to the user)
2755                  *     3. Variable set to numeric value formatted in ASCII, boot into boot loader menu with the specified timeout in seconds
2756                  */
2757
2758                 r = efi_loader_get_config_timeout_one_shot(&x);
2759                 if (r < 0) {
2760                         if (r != -ENOENT)
2761                                 log_warning_errno(r, "Failed to read LoaderConfigTimeoutOneShot variable, ignoring: %m");
2762                 }
2763
2764         } else if (r < 0)
2765                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2766         else if (r > 0) {
2767                 _cleanup_free_ char *v = NULL;
2768
2769                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-menu. */
2770
2771                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-menu", &v);
2772                 if (r < 0) {
2773                         if (r != -ENOENT)
2774                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-menu: %m");
2775                 } else {
2776                         r = safe_atou64(v, &x);
2777                         if (r < 0)
2778                                 log_warning_errno(r, "Failed to parse /run/systemd/reboot-to-boot-loader-menu: %m");
2779                 }
2780         }
2781
2782         return sd_bus_message_append(reply, "t", x);
2783 }
2784
2785 static int method_set_reboot_to_boot_loader_menu(
2786                 sd_bus_message *message,
2787                 void *userdata,
2788                 sd_bus_error *error) {
2789
2790         Manager *m = userdata;
2791         bool use_efi;
2792         uint64_t x;
2793         int r;
2794
2795         assert(message);
2796         assert(m);
2797
2798         r = sd_bus_message_read(message, "t", &x);
2799         if (r < 0)
2800                 return r;
2801
2802         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2803         if (r == -ENXIO) {
2804                 uint64_t features;
2805
2806                 /* EFI case: let's see if booting into boot loader menu is supported. */
2807
2808                 r = efi_loader_get_features(&features);
2809                 if (r < 0)
2810                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
2811                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
2812                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
2813
2814                 use_efi = true;
2815
2816         } else if (r <= 0) {
2817                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to off */
2818
2819                 if (r < 0)
2820                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2821
2822                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
2823         } else
2824                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to on */
2825                 use_efi = false;
2826
2827         r = bus_verify_polkit_async(message,
2828                                     CAP_SYS_ADMIN,
2829                                     "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
2830                                     NULL,
2831                                     false,
2832                                     UID_INVALID,
2833                                     &m->polkit_registry,
2834                                     error);
2835         if (r < 0)
2836                 return r;
2837         if (r == 0)
2838                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2839
2840         if (use_efi) {
2841                 if (x == UINT64_MAX)
2842                         r = efi_set_variable(EFI_VENDOR_LOADER, "LoaderConfigTimeoutOneShot", NULL, 0);
2843                 else {
2844                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
2845                         xsprintf(buf, "%" PRIu64, DIV_ROUND_UP(x, USEC_PER_SEC)); /* second granularity */
2846
2847                         r = efi_set_variable_string(EFI_VENDOR_LOADER, "LoaderConfigTimeoutOneShot", buf);
2848                 }
2849                 if (r < 0)
2850                         return r;
2851         } else {
2852                 if (x == UINT64_MAX) {
2853                         if (unlink("/run/systemd/reboot-to-boot-loader-menu") < 0 && errno != ENOENT)
2854                                 return -errno;
2855                 } else {
2856                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
2857
2858                         xsprintf(buf, "%" PRIu64, x); /* µs granularity */
2859
2860                         r = write_string_file_atomic_label("/run/systemd/reboot-to-boot-loader-menu", buf);
2861                         if (r < 0)
2862                                 return r;
2863                 }
2864         }
2865
2866         return sd_bus_reply_method_return(message, NULL);
2867 }
2868
2869 static int method_can_reboot_to_boot_loader_menu(
2870                 sd_bus_message *message,
2871                 void *userdata,
2872                 sd_bus_error *error) {
2873
2874         _unused_ Manager *m = userdata;
2875         int r;
2876
2877         assert(message);
2878         assert(m);
2879
2880         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2881         if (r == -ENXIO) {
2882                 uint64_t features = 0;
2883
2884                 /* EFI case, let's see if booting into boot loader menu is supported. */
2885
2886                 r = efi_loader_get_features(&features);
2887                 if (r < 0)
2888                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
2889                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
2890                         return sd_bus_reply_method_return(message, "s", "na");
2891
2892         } else if (r <= 0) {
2893                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU */
2894
2895                 if (r < 0)
2896                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2897
2898                 return sd_bus_reply_method_return(message, "s", "na");
2899         }
2900
2901         return return_test_polkit(
2902                         message,
2903                         CAP_SYS_ADMIN,
2904                         "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
2905                         NULL,
2906                         UID_INVALID,
2907                         error);
2908 }
2909
2910 static int property_get_reboot_to_boot_loader_entry(
2911                 sd_bus *bus,
2912                 const char *path,
2913                 const char *interface,
2914                 const char *property,
2915                 sd_bus_message *reply,
2916                 void *userdata,
2917                 sd_bus_error *error) {
2918
2919         _cleanup_free_ char *v = NULL;
2920         Manager *m = userdata;
2921         const char *x = NULL;
2922         int r;
2923
2924         assert(bus);
2925         assert(reply);
2926         assert(m);
2927
2928         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
2929         if (r == -ENXIO) {
2930                 /* EFI case: let's read the LoaderEntryOneShot variable */
2931
2932                 r = efi_loader_update_entry_one_shot_cache(&m->efi_loader_entry_one_shot, &m->efi_loader_entry_one_shot_stat);
2933                 if (r < 0) {
2934                         if (r != -ENOENT)
2935                                 log_warning_errno(r, "Failed to read LoaderEntryOneShot variable, ignoring: %m");
2936                 } else
2937                         x = m->efi_loader_entry_one_shot;
2938
2939         } else if (r < 0)
2940                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
2941         else if (r > 0) {
2942
2943                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-entry. */
2944
2945                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-entry", &v);
2946                 if (r < 0) {
2947                         if (r != -ENOENT)
2948                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-entry, ignoring: %m");
2949                 } else if (!efi_loader_entry_name_valid(v))
2950                         log_warning("/run/systemd/reboot-to-boot-loader-entry is not valid, ignoring.");
2951                 else
2952                         x = v;
2953         }
2954
2955         return sd_bus_message_append(reply, "s", x);
2956 }
2957
2958 static int boot_loader_entry_exists(Manager *m, const char *id) {
2959         _cleanup_(boot_config_free) BootConfig config = {};
2960         int r;
2961
2962         assert(m);
2963         assert(id);
2964
2965         r = boot_entries_load_config_auto(NULL, NULL, &config);
2966         if (r < 0 && r != -ENOKEY) /* don't complain if no GPT is found, hence skip ENOKEY */
2967                 return r;
2968
2969         r = manager_read_efi_boot_loader_entries(m);
2970         if (r >= 0)
2971                 (void) boot_entries_augment_from_loader(&config, m->efi_boot_loader_entries, true);
2972
2973         return boot_config_has_entry(&config, id);
2974 }
2975
2976 static int method_set_reboot_to_boot_loader_entry(
2977                 sd_bus_message *message,
2978                 void *userdata,
2979                 sd_bus_error *error) {
2980
2981         Manager *m = userdata;
2982         bool use_efi;
2983         const char *v;
2984         int r;
2985
2986         assert(message);
2987         assert(m);
2988
2989         r = sd_bus_message_read(message, "s", &v);
2990         if (r < 0)
2991                 return r;
2992
2993         if (isempty(v))
2994                 v = NULL;
2995         else if (efi_loader_entry_name_valid(v)) {
2996                 r = boot_loader_entry_exists(m, v);
2997                 if (r < 0)
2998                         return r;
2999                 if (r == 0)
3000                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader entry '%s' is not known.", v);
3001         } else
3002                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Boot loader entry name '%s' is not valid, refusing.", v);
3003
3004         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3005         if (r == -ENXIO) {
3006                 uint64_t features;
3007
3008                 /* EFI case: let's see if booting into boot loader entry is supported. */
3009
3010                 r = efi_loader_get_features(&features);
3011                 if (r < 0)
3012                         log_warning_errno(r, "Failed to determine whether reboot into boot loader entry is supported: %m");
3013                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3014                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
3015
3016                 use_efi = true;
3017
3018         } else if (r <= 0) {
3019                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to off */
3020
3021                 if (r < 0)
3022                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3023
3024                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
3025         } else
3026                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to on */
3027                 use_efi = false;
3028
3029         r = bus_verify_polkit_async(message,
3030                                     CAP_SYS_ADMIN,
3031                                     "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3032                                     NULL,
3033                                     false,
3034                                     UID_INVALID,
3035                                     &m->polkit_registry,
3036                                     error);
3037         if (r < 0)
3038                 return r;
3039         if (r == 0)
3040                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3041
3042         if (use_efi) {
3043                 if (isempty(v))
3044                         /* Delete item */
3045                         r = efi_set_variable(EFI_VENDOR_LOADER, "LoaderEntryOneShot", NULL, 0);
3046                 else
3047                         r = efi_set_variable_string(EFI_VENDOR_LOADER, "LoaderEntryOneShot", v);
3048                 if (r < 0)
3049                         return r;
3050         } else {
3051                 if (isempty(v)) {
3052                         if (unlink("/run/systemd/reboot-to-boot-loader-entry") < 0 && errno != ENOENT)
3053                                 return -errno;
3054                 } else {
3055                         r = write_string_file_atomic_label("/run/systemd/reboot-boot-to-loader-entry", v);
3056                         if (r < 0)
3057                                 return r;
3058                 }
3059         }
3060
3061         return sd_bus_reply_method_return(message, NULL);
3062 }
3063
3064 static int method_can_reboot_to_boot_loader_entry(
3065                 sd_bus_message *message,
3066                 void *userdata,
3067                 sd_bus_error *error) {
3068
3069         _unused_ Manager *m = userdata;
3070         int r;
3071
3072         assert(message);
3073         assert(m);
3074
3075         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3076         if (r == -ENXIO) {
3077                 uint64_t features = 0;
3078
3079                 /* EFI case, let's see if booting into boot loader entry is supported. */
3080
3081                 r = efi_loader_get_features(&features);
3082                 if (r < 0)
3083                         log_warning_errno(r, "Failed to determine whether reboot to boot loader entry is supported: %m");
3084                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3085                         return sd_bus_reply_method_return(message, "s", "na");
3086
3087         } else if (r <= 0) {
3088                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY */
3089
3090                 if (r < 0)
3091                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3092
3093                 return sd_bus_reply_method_return(message, "s", "na");
3094         }
3095
3096         return return_test_polkit(
3097                         message,
3098                         CAP_SYS_ADMIN,
3099                         "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3100                         NULL,
3101                         UID_INVALID,
3102                         error);
3103 }
3104
3105 static int property_get_boot_loader_entries(
3106                 sd_bus *bus,
3107                 const char *path,
3108                 const char *interface,
3109                 const char *property,
3110                 sd_bus_message *reply,
3111                 void *userdata,
3112                 sd_bus_error *error) {
3113
3114         _cleanup_(boot_config_free) BootConfig config = {};
3115         Manager *m = userdata;
3116         size_t i;
3117         int r;
3118
3119         assert(bus);
3120         assert(reply);
3121         assert(m);
3122
3123         r = boot_entries_load_config_auto(NULL, NULL, &config);
3124         if (r < 0 && r != -ENOKEY) /* don't complain if there's no GPT found */
3125                 return r;
3126
3127         r = manager_read_efi_boot_loader_entries(m);
3128         if (r >= 0)
3129                 (void) boot_entries_augment_from_loader(&config, m->efi_boot_loader_entries, true);
3130
3131         r = sd_bus_message_open_container(reply, 'a', "s");
3132         if (r < 0)
3133                 return r;
3134
3135         for (i = 0; i < config.n_entries; i++) {
3136                 BootEntry *e = config.entries + i;
3137
3138                 r = sd_bus_message_append(reply, "s", e->id);
3139                 if (r < 0)
3140                         return r;
3141         }
3142
3143         return sd_bus_message_close_container(reply);
3144 }
3145
3146 static int method_set_wall_message(
3147                 sd_bus_message *message,
3148                 void *userdata,
3149                 sd_bus_error *error) {
3150
3151         int r;
3152         Manager *m = userdata;
3153         char *wall_message;
3154         unsigned enable_wall_messages;
3155
3156         assert(message);
3157         assert(m);
3158
3159         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
3160         if (r < 0)
3161                 return r;
3162
3163         /* Short-circuit the operation if the desired state is already in place, to
3164          * avoid an unnecessary polkit permission check. */
3165         if (streq_ptr(m->wall_message, empty_to_null(wall_message)) &&
3166             m->enable_wall_messages == enable_wall_messages)
3167                 goto done;
3168
3169         r = bus_verify_polkit_async(message,
3170                                     CAP_SYS_ADMIN,
3171                                     "org.freedesktop.login1.set-wall-message",
3172                                     NULL,
3173                                     false,
3174                                     UID_INVALID,
3175                                     &m->polkit_registry,
3176                                     error);
3177         if (r < 0)
3178                 return r;
3179         if (r == 0)
3180                 return 1; /* Will call us back */
3181
3182         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
3183         if (r < 0)
3184                 return log_oom();
3185
3186         m->enable_wall_messages = enable_wall_messages;
3187
3188  done:
3189         return sd_bus_reply_method_return(message, NULL);
3190 }
3191
3192 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3193         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3194         const char *who, *why, *what, *mode;
3195         _cleanup_free_ char *id = NULL;
3196         _cleanup_close_ int fifo_fd = -1;
3197         Manager *m = userdata;
3198         Inhibitor *i = NULL;
3199         InhibitMode mm;
3200         InhibitWhat w;
3201         pid_t pid;
3202         uid_t uid;
3203         int r;
3204
3205         assert(message);
3206         assert(m);
3207
3208         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
3209         if (r < 0)
3210                 return r;
3211
3212         w = inhibit_what_from_string(what);
3213         if (w <= 0)
3214                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3215                                          "Invalid what specification %s", what);
3216
3217         mm = inhibit_mode_from_string(mode);
3218         if (mm < 0)
3219                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3220                                          "Invalid mode specification %s", mode);
3221
3222         /* Delay is only supported for shutdown/sleep */
3223         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
3224                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3225                                          "Delay inhibitors only supported for shutdown and sleep");
3226
3227         /* Don't allow taking delay locks while we are already
3228          * executing the operation. We shouldn't create the impression
3229          * that the lock was successful if the machine is about to go
3230          * down/suspend any moment. */
3231         if (m->action_what & w)
3232                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
3233                                          "The operation inhibition has been requested for is already running");
3234
3235         r = bus_verify_polkit_async(
3236                         message,
3237                         CAP_SYS_BOOT,
3238                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
3239                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
3240                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
3241                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
3242                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
3243                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
3244                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
3245                         NULL,
3246                         false,
3247                         UID_INVALID,
3248                         &m->polkit_registry,
3249                         error);
3250         if (r < 0)
3251                 return r;
3252         if (r == 0)
3253                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3254
3255         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
3256         if (r < 0)
3257                 return r;
3258
3259         r = sd_bus_creds_get_euid(creds, &uid);
3260         if (r < 0)
3261                 return r;
3262
3263         r = sd_bus_creds_get_pid(creds, &pid);
3264         if (r < 0)
3265                 return r;
3266
3267         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
3268                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
3269                                          "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.",
3270                                          m->inhibitors_max);
3271
3272         do {
3273                 id = mfree(id);
3274
3275                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
3276                         return -ENOMEM;
3277
3278         } while (hashmap_get(m->inhibitors, id));
3279
3280         r = manager_add_inhibitor(m, id, &i);
3281         if (r < 0)
3282                 return r;
3283
3284         i->what = w;
3285         i->mode = mm;
3286         i->pid = pid;
3287         i->uid = uid;
3288         i->why = strdup(why);
3289         i->who = strdup(who);
3290
3291         if (!i->why || !i->who) {
3292                 r = -ENOMEM;
3293                 goto fail;
3294         }
3295
3296         fifo_fd = inhibitor_create_fifo(i);
3297         if (fifo_fd < 0) {
3298                 r = fifo_fd;
3299                 goto fail;
3300         }
3301
3302         r = inhibitor_start(i);
3303         if (r < 0)
3304                 goto fail;
3305
3306         return sd_bus_reply_method_return(message, "h", fifo_fd);
3307
3308 fail:
3309         if (i)
3310                 inhibitor_free(i);
3311
3312         return r;
3313 }
3314
3315 static const sd_bus_vtable manager_vtable[] = {
3316         SD_BUS_VTABLE_START(0),
3317
3318         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
3319         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
3320
3321         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
3322         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
3323         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
3324         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
3325         SD_BUS_PROPERTY("RebootParameter", "s", property_get_reboot_parameter, 0, 0),
3326         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, 0),
3327         SD_BUS_PROPERTY("RebootToBootLoaderMenu", "t", property_get_reboot_to_boot_loader_menu, 0, 0),
3328         SD_BUS_PROPERTY("RebootToBootLoaderEntry", "s", property_get_reboot_to_boot_loader_entry, 0, 0),
3329         SD_BUS_PROPERTY("BootLoaderEntries", "as", property_get_boot_loader_entries, 0, SD_BUS_VTABLE_PROPERTY_CONST),
3330         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3331         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3332         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3333         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3334         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3335         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
3336         SD_BUS_PROPERTY("UserStopDelayUSec", "t", NULL, offsetof(Manager, user_stop_delay), SD_BUS_VTABLE_PROPERTY_CONST),
3337         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
3338         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
3339         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
3340         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
3341         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
3342         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
3343         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3344         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
3345         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3346         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
3347         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
3348         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
3349         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
3350         SD_BUS_PROPERTY("LidClosed", "b", property_get_lid_closed, 0, 0),
3351         SD_BUS_PROPERTY("OnExternalPower", "b", property_get_on_external_power, 0, 0),
3352         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
3353         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
3354         SD_BUS_PROPERTY("RuntimeDirectoryInodesMax", "t", NULL, offsetof(Manager, runtime_dir_inodes), SD_BUS_VTABLE_PROPERTY_CONST),
3355         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
3356         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
3357         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
3358         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
3359         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
3360
3361         SD_BUS_METHOD_WITH_NAMES("GetSession",
3362                                  "s",
3363                                  SD_BUS_PARAM(session_id),
3364                                  "o",
3365                                  SD_BUS_PARAM(object_path),
3366                                  method_get_session,
3367                                  SD_BUS_VTABLE_UNPRIVILEGED),
3368         SD_BUS_METHOD_WITH_NAMES("GetSessionByPID",
3369                                  "u",
3370                                  SD_BUS_PARAM(pid),
3371                                  "o",
3372                                  SD_BUS_PARAM(object_path),
3373                                  method_get_session_by_pid,
3374                                  SD_BUS_VTABLE_UNPRIVILEGED),
3375         SD_BUS_METHOD_WITH_NAMES("GetUser",
3376                                  "u",
3377                                  SD_BUS_PARAM(uid),
3378                                  "o",
3379                                  SD_BUS_PARAM(object_path),
3380                                  method_get_user,
3381                                  SD_BUS_VTABLE_UNPRIVILEGED),
3382         SD_BUS_METHOD_WITH_NAMES("GetUserByPID",
3383                                  "u",
3384                                  SD_BUS_PARAM(pid),
3385                                  "o",
3386                                  SD_BUS_PARAM(object_path),
3387                                  method_get_user_by_pid,
3388                                  SD_BUS_VTABLE_UNPRIVILEGED),
3389         SD_BUS_METHOD_WITH_NAMES("GetSeat",
3390                                  "s",
3391                                  SD_BUS_PARAM(seat_id),
3392                                  "o",
3393                                  SD_BUS_PARAM(object_path),
3394                                  method_get_seat,
3395                                  SD_BUS_VTABLE_UNPRIVILEGED),
3396         SD_BUS_METHOD_WITH_NAMES("ListSessions",
3397                                  NULL,,
3398                                  "a(susso)",
3399                                  SD_BUS_PARAM(sessions),
3400                                  method_list_sessions,
3401                                  SD_BUS_VTABLE_UNPRIVILEGED),
3402         SD_BUS_METHOD_WITH_NAMES("ListUsers",
3403                                  NULL,,
3404                                  "a(uso)",
3405                                  SD_BUS_PARAM(users),
3406                                  method_list_users,
3407                                  SD_BUS_VTABLE_UNPRIVILEGED),
3408         SD_BUS_METHOD_WITH_NAMES("ListSeats",
3409                                  NULL,,
3410                                  "a(so)",
3411                                  SD_BUS_PARAM(seats),
3412                                  method_list_seats,
3413                                  SD_BUS_VTABLE_UNPRIVILEGED),
3414         SD_BUS_METHOD_WITH_NAMES("ListInhibitors",
3415                                  NULL,,
3416                                  "a(ssssuu)",
3417                                  SD_BUS_PARAM(inhibitors),
3418                                  method_list_inhibitors,
3419                                  SD_BUS_VTABLE_UNPRIVILEGED),
3420         SD_BUS_METHOD_WITH_NAMES("CreateSession",
3421                                  "uusssssussbssa(sv)",
3422                                  SD_BUS_PARAM(uid)
3423                                  SD_BUS_PARAM(pid)
3424                                  SD_BUS_PARAM(service)
3425                                  SD_BUS_PARAM(type)
3426                                  SD_BUS_PARAM(class)
3427                                  SD_BUS_PARAM(desktop)
3428                                  SD_BUS_PARAM(seat_id)
3429                                  SD_BUS_PARAM(vtnr)
3430                                  SD_BUS_PARAM(tty)
3431                                  SD_BUS_PARAM(display)
3432                                  SD_BUS_PARAM(remote)
3433                                  SD_BUS_PARAM(remote_user)
3434                                  SD_BUS_PARAM(remote_host)
3435                                  SD_BUS_PARAM(properties),
3436                                  "soshusub",
3437                                  SD_BUS_PARAM(session_id)
3438                                  SD_BUS_PARAM(object_path)
3439                                  SD_BUS_PARAM(runtime_path)
3440                                  SD_BUS_PARAM(fifo_fd)
3441                                  SD_BUS_PARAM(uid)
3442                                  SD_BUS_PARAM(seat_id)
3443                                  SD_BUS_PARAM(vtnr)
3444                                  SD_BUS_PARAM(existing),
3445                                  method_create_session,
3446                                  0),
3447         SD_BUS_METHOD_WITH_NAMES("ReleaseSession",
3448                                  "s",
3449                                  SD_BUS_PARAM(session_id),
3450                                  NULL,,
3451                                  method_release_session,
3452                                  0),
3453         SD_BUS_METHOD_WITH_NAMES("ActivateSession",
3454                                  "s",
3455                                  SD_BUS_PARAM(session_id),
3456                                  NULL,,
3457                                  method_activate_session,
3458                                  SD_BUS_VTABLE_UNPRIVILEGED),
3459         SD_BUS_METHOD_WITH_NAMES("ActivateSessionOnSeat",
3460                                  "ss",
3461                                  SD_BUS_PARAM(session_id)
3462                                  SD_BUS_PARAM(seat_id),
3463                                  NULL,,
3464                                  method_activate_session_on_seat,
3465                                  SD_BUS_VTABLE_UNPRIVILEGED),
3466         SD_BUS_METHOD_WITH_NAMES("LockSession",
3467                                  "s",
3468                                  SD_BUS_PARAM(session_id),
3469                                  NULL,,
3470                                  method_lock_session,
3471                                  SD_BUS_VTABLE_UNPRIVILEGED),
3472         SD_BUS_METHOD_WITH_NAMES("UnlockSession",
3473                                  "s",
3474                                  SD_BUS_PARAM(session_id),
3475                                  NULL,,
3476                                  method_lock_session,
3477                                  SD_BUS_VTABLE_UNPRIVILEGED),
3478         SD_BUS_METHOD("LockSessions",
3479                       NULL,
3480                       NULL,
3481                       method_lock_sessions,
3482                       SD_BUS_VTABLE_UNPRIVILEGED),
3483         SD_BUS_METHOD("UnlockSessions",
3484                       NULL,
3485                       NULL,
3486                       method_lock_sessions,
3487                       SD_BUS_VTABLE_UNPRIVILEGED),
3488         SD_BUS_METHOD_WITH_NAMES("KillSession",
3489                                  "ssi",
3490                                  SD_BUS_PARAM(session_id)
3491                                  SD_BUS_PARAM(who)
3492                                  SD_BUS_PARAM(signal_number),
3493                                  NULL,,
3494                                  method_kill_session,
3495                                  SD_BUS_VTABLE_UNPRIVILEGED),
3496         SD_BUS_METHOD_WITH_NAMES("KillUser",
3497                                  "ui",
3498                                  SD_BUS_PARAM(uid)
3499                                  SD_BUS_PARAM(signal_number),
3500                                  NULL,,
3501                                  method_kill_user,
3502                                  SD_BUS_VTABLE_UNPRIVILEGED),
3503         SD_BUS_METHOD_WITH_NAMES("TerminateSession",
3504                                  "s",
3505                                  SD_BUS_PARAM(session_id),
3506                                  NULL,,
3507                                  method_terminate_session,
3508                                  SD_BUS_VTABLE_UNPRIVILEGED),
3509         SD_BUS_METHOD_WITH_NAMES("TerminateUser",
3510                                  "u",
3511                                  SD_BUS_PARAM(uid),
3512                                  NULL,,
3513                                  method_terminate_user,
3514                                  SD_BUS_VTABLE_UNPRIVILEGED),
3515         SD_BUS_METHOD_WITH_NAMES("TerminateSeat",
3516                                  "s",
3517                                  SD_BUS_PARAM(seat_id),
3518                                  NULL,,
3519                                  method_terminate_seat,
3520                                  SD_BUS_VTABLE_UNPRIVILEGED),
3521         SD_BUS_METHOD_WITH_NAMES("SetUserLinger",
3522                                  "ubb",
3523                                  SD_BUS_PARAM(uid)
3524                                  SD_BUS_PARAM(enable)
3525                                  SD_BUS_PARAM(interactive),
3526                                  NULL,,
3527                                  method_set_user_linger,
3528                                  SD_BUS_VTABLE_UNPRIVILEGED),
3529         SD_BUS_METHOD_WITH_NAMES("AttachDevice",
3530                                  "ssb",
3531                                  SD_BUS_PARAM(seat_id)
3532                                  SD_BUS_PARAM(sysfs_path)
3533                                  SD_BUS_PARAM(interactive),
3534                                  NULL,,
3535                                  method_attach_device,
3536                                  SD_BUS_VTABLE_UNPRIVILEGED),
3537         SD_BUS_METHOD_WITH_NAMES("FlushDevices",
3538                                  "b",
3539                                  SD_BUS_PARAM(interactive),
3540                                  NULL,,
3541                                  method_flush_devices,
3542                                  SD_BUS_VTABLE_UNPRIVILEGED),
3543         SD_BUS_METHOD_WITH_NAMES("PowerOff",
3544                                  "b",
3545                                  SD_BUS_PARAM(interactive),
3546                                  NULL,,
3547                                  method_poweroff,
3548                                  SD_BUS_VTABLE_UNPRIVILEGED),
3549         SD_BUS_METHOD_WITH_NAMES("Reboot",
3550                                  "b",
3551                                  SD_BUS_PARAM(interactive),
3552                                  NULL,,
3553                                  method_reboot,
3554                                  SD_BUS_VTABLE_UNPRIVILEGED),
3555         SD_BUS_METHOD_WITH_NAMES("Halt",
3556                                  "b",
3557                                  SD_BUS_PARAM(interactive),
3558                                  NULL,,
3559                                  method_halt,
3560                                  SD_BUS_VTABLE_UNPRIVILEGED),
3561         SD_BUS_METHOD_WITH_NAMES("Suspend",
3562                                  "b",
3563                                  SD_BUS_PARAM(interactive),
3564                                  NULL,,
3565                                  method_suspend,
3566                                  SD_BUS_VTABLE_UNPRIVILEGED),
3567         SD_BUS_METHOD_WITH_NAMES("Hibernate",
3568                                  "b",
3569                                  SD_BUS_PARAM(interactive),
3570                                  NULL,,
3571                                  method_hibernate,
3572                                  SD_BUS_VTABLE_UNPRIVILEGED),
3573         SD_BUS_METHOD_WITH_NAMES("HybridSleep",
3574                                  "b",
3575                                  SD_BUS_PARAM(interactive),
3576                                  NULL,,
3577                                  method_hybrid_sleep,
3578                                  SD_BUS_VTABLE_UNPRIVILEGED),
3579         SD_BUS_METHOD_WITH_NAMES("SuspendThenHibernate",
3580                                  "b",
3581                                  SD_BUS_PARAM(interactive),
3582                                  NULL,,
3583                                  method_suspend_then_hibernate,
3584                                  SD_BUS_VTABLE_UNPRIVILEGED),
3585         SD_BUS_METHOD_WITH_NAMES("CanPowerOff",
3586                                  NULL,,
3587                                  "s",
3588                                  SD_BUS_PARAM(result),
3589                                  method_can_poweroff,
3590                                  SD_BUS_VTABLE_UNPRIVILEGED),
3591         SD_BUS_METHOD_WITH_NAMES("CanReboot",
3592                                  NULL,,
3593                                  "s",
3594                                  SD_BUS_PARAM(result),
3595                                  method_can_reboot,
3596                                  SD_BUS_VTABLE_UNPRIVILEGED),
3597         SD_BUS_METHOD_WITH_NAMES("CanHalt",
3598                                  NULL,,
3599                                  "s",
3600                                  SD_BUS_PARAM(result),
3601                                  method_can_halt,
3602                                  SD_BUS_VTABLE_UNPRIVILEGED),
3603         SD_BUS_METHOD_WITH_NAMES("CanSuspend",
3604                                  NULL,,
3605                                  "s",
3606                                  SD_BUS_PARAM(result),
3607                                  method_can_suspend,
3608                                  SD_BUS_VTABLE_UNPRIVILEGED),
3609         SD_BUS_METHOD_WITH_NAMES("CanHibernate",
3610                                  NULL,,
3611                                  "s",
3612                                  SD_BUS_PARAM(result),
3613                                  method_can_hibernate,
3614                                  SD_BUS_VTABLE_UNPRIVILEGED),
3615         SD_BUS_METHOD_WITH_NAMES("CanHybridSleep",
3616                                  NULL,,
3617                                  "s",
3618                                  SD_BUS_PARAM(result),
3619                                  method_can_hybrid_sleep,
3620                                  SD_BUS_VTABLE_UNPRIVILEGED),
3621         SD_BUS_METHOD_WITH_NAMES("CanSuspendThenHibernate",
3622                                  NULL,,
3623                                  "s",
3624                                  SD_BUS_PARAM(result),
3625                                  method_can_suspend_then_hibernate,
3626                                  SD_BUS_VTABLE_UNPRIVILEGED),
3627         SD_BUS_METHOD_WITH_NAMES("ScheduleShutdown",
3628                                  "st",
3629                                  SD_BUS_PARAM(type)
3630                                  SD_BUS_PARAM(usec),
3631                                  NULL,,
3632                                  method_schedule_shutdown,
3633                                  SD_BUS_VTABLE_UNPRIVILEGED),
3634         SD_BUS_METHOD_WITH_NAMES("CancelScheduledShutdown",
3635                                  NULL,,
3636                                  "b",
3637                                  SD_BUS_PARAM(cancelled),
3638                                  method_cancel_scheduled_shutdown,
3639                                  SD_BUS_VTABLE_UNPRIVILEGED),
3640         SD_BUS_METHOD_WITH_NAMES("Inhibit",
3641                                  "ssss",
3642                                  SD_BUS_PARAM(what)
3643                                  SD_BUS_PARAM(who)
3644                                  SD_BUS_PARAM(why)
3645                                  SD_BUS_PARAM(mode),
3646                                  "h",
3647                                  SD_BUS_PARAM(pipe_fd),
3648                                  method_inhibit,
3649                                  SD_BUS_VTABLE_UNPRIVILEGED),
3650         SD_BUS_METHOD_WITH_NAMES("CanRebootParameter",
3651                                  NULL,,
3652                                  "s",
3653                                  SD_BUS_PARAM(result),
3654                                  method_can_reboot_parameter,
3655                                  SD_BUS_VTABLE_UNPRIVILEGED),
3656         SD_BUS_METHOD_WITH_NAMES("SetRebootParameter",
3657                                  "s",
3658                                  SD_BUS_PARAM(parameter),
3659                                  NULL,,
3660                                  method_set_reboot_parameter,
3661                                  SD_BUS_VTABLE_UNPRIVILEGED),
3662         SD_BUS_METHOD_WITH_NAMES("CanRebootToFirmwareSetup",
3663                                  NULL,,
3664                                  "s",
3665                                  SD_BUS_PARAM(result),
3666                                  method_can_reboot_to_firmware_setup,
3667                                  SD_BUS_VTABLE_UNPRIVILEGED),
3668         SD_BUS_METHOD_WITH_NAMES("SetRebootToFirmwareSetup",
3669                                  "b",
3670                                  SD_BUS_PARAM(enable),
3671                                  NULL,,
3672                                  method_set_reboot_to_firmware_setup,
3673                                  SD_BUS_VTABLE_UNPRIVILEGED),
3674         SD_BUS_METHOD_WITH_NAMES("CanRebootToBootLoaderMenu",
3675                                  NULL,,
3676                                  "s",
3677                                  SD_BUS_PARAM(result),
3678                                  method_can_reboot_to_boot_loader_menu,
3679                                  SD_BUS_VTABLE_UNPRIVILEGED),
3680         SD_BUS_METHOD_WITH_NAMES("SetRebootToBootLoaderMenu",
3681                                  "t",
3682                                  SD_BUS_PARAM(timeout),
3683                                  NULL,,
3684                                  method_set_reboot_to_boot_loader_menu,
3685                                  SD_BUS_VTABLE_UNPRIVILEGED),
3686         SD_BUS_METHOD_WITH_NAMES("CanRebootToBootLoaderEntry",
3687                                  NULL,,
3688                                  "s",
3689                                  SD_BUS_PARAM(result),
3690                                  method_can_reboot_to_boot_loader_entry,
3691                                  SD_BUS_VTABLE_UNPRIVILEGED),
3692         SD_BUS_METHOD_WITH_NAMES("SetRebootToBootLoaderEntry",
3693                                  "s",
3694                                  SD_BUS_PARAM(boot_loader_entry),
3695                                  NULL,,
3696                                  method_set_reboot_to_boot_loader_entry,
3697                                  SD_BUS_VTABLE_UNPRIVILEGED),
3698         SD_BUS_METHOD_WITH_NAMES("SetWallMessage",
3699                                  "sb",
3700                                  SD_BUS_PARAM(wall_message)
3701                                  SD_BUS_PARAM(enable),
3702                                  NULL,,
3703                                  method_set_wall_message,
3704                                  SD_BUS_VTABLE_UNPRIVILEGED),
3705
3706         SD_BUS_SIGNAL_WITH_NAMES("SessionNew",
3707                                  "so",
3708                                  SD_BUS_PARAM(session_id)
3709                                  SD_BUS_PARAM(object_path),
3710                                  0),
3711         SD_BUS_SIGNAL_WITH_NAMES("SessionRemoved",
3712                                  "so",
3713                                  SD_BUS_PARAM(session_id)
3714                                  SD_BUS_PARAM(object_path),
3715                                  0),
3716         SD_BUS_SIGNAL_WITH_NAMES("UserNew",
3717                                  "uo",
3718                                  SD_BUS_PARAM(uid)
3719                                  SD_BUS_PARAM(object_path),
3720                                  0),
3721         SD_BUS_SIGNAL_WITH_NAMES("UserRemoved",
3722                                  "uo",
3723                                  SD_BUS_PARAM(uid)
3724                                  SD_BUS_PARAM(object_path),
3725                                  0),
3726         SD_BUS_SIGNAL_WITH_NAMES("SeatNew",
3727                                  "so",
3728                                  SD_BUS_PARAM(seat_id)
3729                                  SD_BUS_PARAM(object_path),
3730                                  0),
3731         SD_BUS_SIGNAL_WITH_NAMES("SeatRemoved",
3732                                  "so",
3733                                  SD_BUS_PARAM(seat_id)
3734                                  SD_BUS_PARAM(object_path),
3735                                  0),
3736         SD_BUS_SIGNAL_WITH_NAMES("PrepareForShutdown",
3737                                  "b",
3738                                  SD_BUS_PARAM(start),
3739                                  0),
3740         SD_BUS_SIGNAL_WITH_NAMES("PrepareForSleep",
3741                                  "b",
3742                                  SD_BUS_PARAM(start),
3743                                  0),
3744
3745         SD_BUS_VTABLE_END
3746 };
3747
3748 const BusObjectImplementation manager_object = {
3749         "/org/freedesktop/login1",
3750         "org.freedesktop.login1.Manager",
3751         .vtables = BUS_VTABLES(manager_vtable),
3752         .children = BUS_IMPLEMENTATIONS(&seat_object,
3753                                         &session_object,
3754                                         &user_object),
3755 };
3756
3757 static int session_jobs_reply(Session *s, uint32_t jid, const char *unit, const char *result) {
3758         assert(s);
3759         assert(unit);
3760
3761         if (!s->started)
3762                 return 0;
3763
3764         if (result && !streq(result, "done")) {
3765                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
3766
3767                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED,
3768                                   "Job %u for unit '%s' failed with '%s'", jid, unit, result);
3769                 return session_send_create_reply(s, &e);
3770         }
3771
3772         return session_send_create_reply(s, NULL);
3773 }
3774
3775 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3776         const char *path, *result, *unit;
3777         Manager *m = userdata;
3778         Session *session;
3779         uint32_t id;
3780         User *user;
3781         int r;
3782
3783         assert(message);
3784         assert(m);
3785
3786         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
3787         if (r < 0) {
3788                 bus_log_parse_error(r);
3789                 return 0;
3790         }
3791
3792         if (m->action_job && streq(m->action_job, path)) {
3793                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
3794
3795                 /* Tell people that they now may take a lock again */
3796                 (void) send_prepare_for(m, m->action_what, false);
3797
3798                 m->action_job = mfree(m->action_job);
3799                 m->action_unit = NULL;
3800                 m->action_what = 0;
3801                 return 0;
3802         }
3803
3804         session = hashmap_get(m->session_units, unit);
3805         if (session) {
3806                 if (streq_ptr(path, session->scope_job)) {
3807                         session->scope_job = mfree(session->scope_job);
3808                         (void) session_jobs_reply(session, id, unit, result);
3809
3810                         session_save(session);
3811                         user_save(session->user);
3812                 }
3813
3814                 session_add_to_gc_queue(session);
3815         }
3816
3817         user = hashmap_get(m->user_units, unit);
3818         if (user) {
3819                 if (streq_ptr(path, user->service_job)) {
3820                         user->service_job = mfree(user->service_job);
3821
3822                         LIST_FOREACH(sessions_by_user, session, user->sessions)
3823                                 (void) session_jobs_reply(session, id, unit, NULL /* don't propagate user service failures to the client */);
3824
3825                         user_save(user);
3826                 }
3827
3828                 user_add_to_gc_queue(user);
3829         }
3830
3831         return 0;
3832 }
3833
3834 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3835         const char *path, *unit;
3836         Manager *m = userdata;
3837         Session *session;
3838         User *user;
3839         int r;
3840
3841         assert(message);
3842         assert(m);
3843
3844         r = sd_bus_message_read(message, "so", &unit, &path);
3845         if (r < 0) {
3846                 bus_log_parse_error(r);
3847                 return 0;
3848         }
3849
3850         session = hashmap_get(m->session_units, unit);
3851         if (session)
3852                 session_add_to_gc_queue(session);
3853
3854         user = hashmap_get(m->user_units, unit);
3855         if (user)
3856                 user_add_to_gc_queue(user);
3857
3858         return 0;
3859 }
3860
3861 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3862         _cleanup_free_ char *unit = NULL;
3863         Manager *m = userdata;
3864         const char *path;
3865         Session *session;
3866         User *user;
3867         int r;
3868
3869         assert(message);
3870         assert(m);
3871
3872         path = sd_bus_message_get_path(message);
3873         if (!path)
3874                 return 0;
3875
3876         r = unit_name_from_dbus_path(path, &unit);
3877         if (r == -EINVAL) /* not a unit */
3878                 return 0;
3879         if (r < 0) {
3880                 log_oom();
3881                 return 0;
3882         }
3883
3884         session = hashmap_get(m->session_units, unit);
3885         if (session)
3886                 session_add_to_gc_queue(session);
3887
3888         user = hashmap_get(m->user_units, unit);
3889         if (user)
3890                 user_add_to_gc_queue(user);
3891
3892         return 0;
3893 }
3894
3895 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3896         Manager *m = userdata;
3897         Session *session;
3898         int b, r;
3899
3900         assert(message);
3901         assert(m);
3902
3903         r = sd_bus_message_read(message, "b", &b);
3904         if (r < 0) {
3905                 bus_log_parse_error(r);
3906                 return 0;
3907         }
3908
3909         if (b)
3910                 return 0;
3911
3912         /* systemd finished reloading, let's recheck all our sessions */
3913         log_debug("System manager has been reloaded, rechecking sessions...");
3914
3915         HASHMAP_FOREACH(session, m->sessions)
3916                 session_add_to_gc_queue(session);
3917
3918         return 0;
3919 }
3920
3921 int manager_send_changed(Manager *manager, const char *property, ...) {
3922         char **l;
3923
3924         assert(manager);
3925
3926         l = strv_from_stdarg_alloca(property);
3927
3928         return sd_bus_emit_properties_changed_strv(
3929                         manager->bus,
3930                         "/org/freedesktop/login1",
3931                         "org.freedesktop.login1.Manager",
3932                         l);
3933 }
3934
3935 static int strdup_job(sd_bus_message *reply, char **job) {
3936         const char *j;
3937         char *copy;
3938         int r;
3939
3940         r = sd_bus_message_read(reply, "o", &j);
3941         if (r < 0)
3942                 return r;
3943
3944         copy = strdup(j);
3945         if (!copy)
3946                 return -ENOMEM;
3947
3948         *job = copy;
3949         return 1;
3950 }
3951
3952 int manager_start_scope(
3953                 Manager *manager,
3954                 const char *scope,
3955                 pid_t pid,
3956                 const char *slice,
3957                 const char *description,
3958                 char **wants,
3959                 char **after,
3960                 const char *requires_mounts_for,
3961                 sd_bus_message *more_properties,
3962                 sd_bus_error *error,
3963                 char **job) {
3964
3965         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3966         char **i;
3967         int r;
3968
3969         assert(manager);
3970         assert(scope);
3971         assert(pid > 1);
3972         assert(job);
3973
3974         r = bus_message_new_method_call(manager->bus, &m, bus_systemd_mgr, "StartTransientUnit");
3975         if (r < 0)
3976                 return r;
3977
3978         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3979         if (r < 0)
3980                 return r;
3981
3982         r = sd_bus_message_open_container(m, 'a', "(sv)");
3983         if (r < 0)
3984                 return r;
3985
3986         if (!isempty(slice)) {
3987                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3988                 if (r < 0)
3989                         return r;
3990         }
3991
3992         if (!isempty(description)) {
3993                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3994                 if (r < 0)
3995                         return r;
3996         }
3997
3998         STRV_FOREACH(i, wants) {
3999                 r = sd_bus_message_append(m, "(sv)", "Wants", "as", 1, *i);
4000                 if (r < 0)
4001                         return r;
4002         }
4003
4004         STRV_FOREACH(i, after) {
4005                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, *i);
4006                 if (r < 0)
4007                         return r;
4008         }
4009
4010         if (!empty_or_root(requires_mounts_for)) {
4011                 r = sd_bus_message_append(m, "(sv)", "RequiresMountsFor", "as", 1, requires_mounts_for);
4012                 if (r < 0)
4013                         return r;
4014         }
4015
4016         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
4017          * SIGTERM */
4018         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
4019         if (r < 0)
4020                 return r;
4021
4022         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
4023         if (r < 0)
4024                 return r;
4025
4026         /* disable TasksMax= for the session scope, rely on the slice setting for it */
4027         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
4028         if (r < 0)
4029                 return bus_log_create_error(r);
4030
4031         if (more_properties) {
4032                 /* If TasksMax also appears here, it will overwrite the default value set above */
4033                 r = sd_bus_message_copy(m, more_properties, true);
4034                 if (r < 0)
4035                         return r;
4036         }
4037
4038         r = sd_bus_message_close_container(m);
4039         if (r < 0)
4040                 return r;
4041
4042         r = sd_bus_message_append(m, "a(sa(sv))", 0);
4043         if (r < 0)
4044                 return r;
4045
4046         r = sd_bus_call(manager->bus, m, 0, error, &reply);
4047         if (r < 0)
4048                 return r;
4049
4050         return strdup_job(reply, job);
4051 }
4052
4053 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
4054         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4055         int r;
4056
4057         assert(manager);
4058         assert(unit);
4059         assert(job);
4060
4061         r = bus_call_method(
4062                         manager->bus,
4063                         bus_systemd_mgr,
4064                         "StartUnit",
4065                         error,
4066                         &reply,
4067                         "ss", unit, "replace");
4068         if (r < 0)
4069                 return r;
4070
4071         return strdup_job(reply, job);
4072 }
4073
4074 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
4075         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4076         int r;
4077
4078         assert(manager);
4079         assert(unit);
4080         assert(job);
4081
4082         r = bus_call_method(
4083                         manager->bus,
4084                         bus_systemd_mgr,
4085                         "StopUnit",
4086                         error,
4087                         &reply,
4088                         "ss", unit, "fail");
4089         if (r < 0) {
4090                 if (sd_bus_error_has_names(error, BUS_ERROR_NO_SUCH_UNIT,
4091                                                   BUS_ERROR_LOAD_FAILED)) {
4092
4093                         *job = NULL;
4094                         sd_bus_error_free(error);
4095                         return 0;
4096                 }
4097
4098                 return r;
4099         }
4100
4101         return strdup_job(reply, job);
4102 }
4103
4104 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *ret_error) {
4105         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4106         _cleanup_free_ char *path = NULL;
4107         int r;
4108
4109         assert(manager);
4110         assert(scope);
4111
4112         path = unit_dbus_path_from_name(scope);
4113         if (!path)
4114                 return -ENOMEM;
4115
4116         r = sd_bus_call_method(
4117                         manager->bus,
4118                         "org.freedesktop.systemd1",
4119                         path,
4120                         "org.freedesktop.systemd1.Scope",
4121                         "Abandon",
4122                         &error,
4123                         NULL,
4124                         NULL);
4125         if (r < 0) {
4126                 if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT,
4127                                                    BUS_ERROR_LOAD_FAILED,
4128                                                    BUS_ERROR_SCOPE_NOT_RUNNING))
4129                         return 0;
4130
4131                 sd_bus_error_move(ret_error, &error);
4132                 return r;
4133         }
4134
4135         return 1;
4136 }
4137
4138 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
4139         assert(manager);
4140         assert(unit);
4141
4142         return bus_call_method(
4143                         manager->bus,
4144                         bus_systemd_mgr,
4145                         "KillUnit",
4146                         error,
4147                         NULL,
4148                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
4149 }
4150
4151 int manager_unit_is_active(Manager *manager, const char *unit, sd_bus_error *ret_error) {
4152         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4153         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4154         _cleanup_free_ char *path = NULL;
4155         const char *state;
4156         int r;
4157
4158         assert(manager);
4159         assert(unit);
4160
4161         path = unit_dbus_path_from_name(unit);
4162         if (!path)
4163                 return -ENOMEM;
4164
4165         r = sd_bus_get_property(
4166                         manager->bus,
4167                         "org.freedesktop.systemd1",
4168                         path,
4169                         "org.freedesktop.systemd1.Unit",
4170                         "ActiveState",
4171                         &error,
4172                         &reply,
4173                         "s");
4174         if (r < 0) {
4175                 /* systemd might have dropped off momentarily, let's
4176                  * not make this an error */
4177                 if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY,
4178                                                    SD_BUS_ERROR_DISCONNECTED))
4179                         return true;
4180
4181                 /* If the unit is already unloaded then it's not
4182                  * active */
4183                 if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT,
4184                                                    BUS_ERROR_LOAD_FAILED))
4185                         return false;
4186
4187                 sd_bus_error_move(ret_error, &error);
4188                 return r;
4189         }
4190
4191         r = sd_bus_message_read(reply, "s", &state);
4192         if (r < 0)
4193                 return r;
4194
4195         return !STR_IN_SET(state, "inactive", "failed");
4196 }
4197
4198 int manager_job_is_active(Manager *manager, const char *path, sd_bus_error *ret_error) {
4199         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4200         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4201         int r;
4202
4203         assert(manager);
4204         assert(path);
4205
4206         r = sd_bus_get_property(
4207                         manager->bus,
4208                         "org.freedesktop.systemd1",
4209                         path,
4210                         "org.freedesktop.systemd1.Job",
4211                         "State",
4212                         &error,
4213                         &reply,
4214                         "s");
4215         if (r < 0) {
4216                 if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY,
4217                                                    SD_BUS_ERROR_DISCONNECTED))
4218                         return true;
4219
4220                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
4221                         return false;
4222
4223                 sd_bus_error_move(ret_error, &error);
4224                 return r;
4225         }
4226
4227         /* We don't actually care about the state really. The fact
4228          * that we could read the job state is enough for us */
4229
4230         return true;
4231 }