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         Iterator i;
 520         int r;
 521
 522         assert(message);
 523         assert(m);
 524
 525         r = sd_bus_message_new_method_return(message, &reply);
 526         if (r < 0)
 527                 return r;
 528
 529         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 530         if (r < 0)
 531                 return r;
 532
 533         HASHMAP_FOREACH(session, m->sessions, i) {
 534                 _cleanup_free_ char *p = NULL;
 535
 536                 p = session_bus_path(session);
 537                 if (!p)
 538                         return -ENOMEM;
 539
 540                 r = sd_bus_message_append(reply, "(susso)",
 541                                           session->id,
 542                                           (uint32_t) session->user->user_record->uid,
 543                                           session->user->user_record->user_name,
 544                                           session->seat ? session->seat->id : "",
 545                                           p);
 546                 if (r < 0)
 547                         return r;
 548         }
 549
 550         r = sd_bus_message_close_container(reply);
 551         if (r < 0)
 552                 return r;
 553
 554         return sd_bus_send(NULL, reply, NULL);
 555 }
 556
 557 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 558         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 559         Manager *m = userdata;
 560         User *user;
 561         Iterator i;
 562         int r;
 563
 564         assert(message);
 565         assert(m);
 566
 567         r = sd_bus_message_new_method_return(message, &reply);
 568         if (r < 0)
 569                 return r;
 570
 571         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 572         if (r < 0)
 573                 return r;
 574
 575         HASHMAP_FOREACH(user, m->users, i) {
 576                 _cleanup_free_ char *p = NULL;
 577
 578                 p = user_bus_path(user);
 579                 if (!p)
 580                         return -ENOMEM;
 581
 582                 r = sd_bus_message_append(reply, "(uso)",
 583                                           (uint32_t) user->user_record->uid,
 584                                           user->user_record->user_name,
 585                                           p);
 586                 if (r < 0)
 587                         return r;
 588         }
 589
 590         r = sd_bus_message_close_container(reply);
 591         if (r < 0)
 592                 return r;
 593
 594         return sd_bus_send(NULL, reply, NULL);
 595 }
 596
 597 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 598         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 599         Manager *m = userdata;
 600         Seat *seat;
 601         Iterator i;
 602         int r;
 603
 604         assert(message);
 605         assert(m);
 606
 607         r = sd_bus_message_new_method_return(message, &reply);
 608         if (r < 0)
 609                 return r;
 610
 611         r = sd_bus_message_open_container(reply, 'a', "(so)");
 612         if (r < 0)
 613                 return r;
 614
 615         HASHMAP_FOREACH(seat, m->seats, i) {
 616                 _cleanup_free_ char *p = NULL;
 617
 618                 p = seat_bus_path(seat);
 619                 if (!p)
 620                         return -ENOMEM;
 621
 622                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 623                 if (r < 0)
 624                         return r;
 625         }
 626
 627         r = sd_bus_message_close_container(reply);
 628         if (r < 0)
 629                 return r;
 630
 631         return sd_bus_send(NULL, reply, NULL);
 632 }
 633
 634 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 635         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 636         Manager *m = userdata;
 637         Inhibitor *inhibitor;
 638         Iterator i;
 639         int r;
 640
 641         assert(message);
 642         assert(m);
 643
 644         r = sd_bus_message_new_method_return(message, &reply);
 645         if (r < 0)
 646                 return r;
 647
 648         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 649         if (r < 0)
 650                 return r;
 651
 652         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 653
 654                 r = sd_bus_message_append(reply, "(ssssuu)",
 655                                           strempty(inhibit_what_to_string(inhibitor->what)),
 656                                           strempty(inhibitor->who),
 657                                           strempty(inhibitor->why),
 658                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 659                                           (uint32_t) inhibitor->uid,
 660                                           (uint32_t) inhibitor->pid);
 661                 if (r < 0)
 662                         return r;
 663         }
 664
 665         r = sd_bus_message_close_container(reply);
 666         if (r < 0)
 667                 return r;
 668
 669         return sd_bus_send(NULL, reply, NULL);
 670 }
 671
 672 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 673         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 674         _cleanup_free_ char *id = NULL;
 675         Session *session = NULL;
 676         uint32_t audit_id = 0;
 677         Manager *m = userdata;
 678         User *user = NULL;
 679         Seat *seat = NULL;
 680         pid_t leader;
 681         uid_t uid;
 682         int remote;
 683         uint32_t vtnr = 0;
 684         SessionType t;
 685         SessionClass c;
 686         int r;
 687
 688         assert(message);
 689         assert(m);
 690
 691         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 692         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 693
 694         r = sd_bus_message_read(message, "uusssssussbss",
 695                                 &uid, &leader, &service, &type, &class, &desktop, &cseat,
 696                                 &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 697         if (r < 0)
 698                 return r;
 699
 700         if (!uid_is_valid(uid))
 701                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 702         if (leader < 0 || leader == 1 || leader == getpid_cached())
 703                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 704
 705         if (isempty(type))
 706                 t = _SESSION_TYPE_INVALID;
 707         else {
 708                 t = session_type_from_string(type);
 709                 if (t < 0)
 710                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 711                                                  "Invalid session type %s", type);
 712         }
 713
 714         if (isempty(class))
 715                 c = _SESSION_CLASS_INVALID;
 716         else {
 717                 c = session_class_from_string(class);
 718                 if (c < 0)
 719                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 720                                                  "Invalid session class %s", class);
 721         }
 722
 723         if (isempty(desktop))
 724                 desktop = NULL;
 725         else {
 726                 if (!string_is_safe(desktop))
 727                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 728                                                  "Invalid desktop string %s", desktop);
 729         }
 730
 731         if (isempty(cseat))
 732                 seat = NULL;
 733         else {
 734                 seat = hashmap_get(m->seats, cseat);
 735                 if (!seat)
 736                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT,
 737                                                  "No seat '%s' known", cseat);
 738         }
 739
 740         if (tty_is_vc(tty)) {
 741                 int v;
 742
 743                 if (!seat)
 744                         seat = m->seat0;
 745                 else if (seat != m->seat0)
 746                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 747                                                  "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 748
 749                 v = vtnr_from_tty(tty);
 750                 if (v <= 0)
 751                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 752                                                  "Cannot determine VT number from virtual console TTY %s", tty);
 753
 754                 if (vtnr == 0)
 755                         vtnr = (uint32_t) v;
 756                 else if (vtnr != (uint32_t) v)
 757                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 758                                                  "Specified TTY and VT number do not match");
 759
 760         } else if (tty_is_console(tty)) {
 761
 762                 if (!seat)
 763                         seat = m->seat0;
 764                 else if (seat != m->seat0)
 765                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 766                                                  "Console TTY specified but seat is not seat0");
 767
 768                 if (vtnr != 0)
 769                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 770                                                  "Console TTY specified but VT number is not 0");
 771         }
 772
 773         if (seat) {
 774                 if (seat_has_vts(seat)) {
 775                         if (vtnr <= 0 || vtnr > 63)
 776                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 777                                                          "VT number out of range");
 778                 } else {
 779                         if (vtnr != 0)
 780                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 781                                                          "Seat has no VTs but VT number not 0");
 782                 }
 783         }
 784
 785         if (t == _SESSION_TYPE_INVALID) {
 786                 if (!isempty(display))
 787                         t = SESSION_X11;
 788                 else if (!isempty(tty))
 789                         t = SESSION_TTY;
 790                 else
 791                         t = SESSION_UNSPECIFIED;
 792         }
 793
 794         if (c == _SESSION_CLASS_INVALID) {
 795                 if (t == SESSION_UNSPECIFIED)
 796                         c = SESSION_BACKGROUND;
 797                 else
 798                         c = SESSION_USER;
 799         }
 800
 801         if (leader == 0) {
 802                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 803
 804                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 805                 if (r < 0)
 806                         return r;
 807
 808                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 809                 if (r < 0)
 810                         return r;
 811         }
 812
 813         /* Check if we are already in a logind session. Or if we are in user@.service
 814          * which is a special PAM session that avoids creating a logind session. */
 815         r = manager_get_user_by_pid(m, leader, NULL);
 816         if (r < 0)
 817                 return r;
 818         if (r > 0)
 819                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY,
 820                                          "Already running in a session or user slice");
 821
 822         /*
 823          * Old gdm and lightdm start the user-session on the same VT as
 824          * the greeter session. But they destroy the greeter session
 825          * after the user-session and want the user-session to take
 826          * over the VT. We need to support this for
 827          * backwards-compatibility, so make sure we allow new sessions
 828          * on a VT that a greeter is running on. Furthermore, to allow
 829          * re-logins, we have to allow a greeter to take over a used VT for
 830          * the exact same reasons.
 831          */
 832         if (c != SESSION_GREETER &&
 833             vtnr > 0 &&
 834             vtnr < m->seat0->position_count &&
 835             m->seat0->positions[vtnr] &&
 836             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 837                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 838
 839         if (hashmap_size(m->sessions) >= m->sessions_max)
 840                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
 841                                          "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.",
 842                                          m->sessions_max);
 843
 844         (void) audit_session_from_pid(leader, &audit_id);
 845         if (audit_session_is_valid(audit_id)) {
 846                 /* Keep our session IDs and the audit session IDs in sync */
 847
 848                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 849                         return -ENOMEM;
 850
 851                 /* Wut? There's already a session by this name and we didn't find it above? Weird, then let's
 852                  * not trust the audit data and let's better register a new ID */
 853                 if (hashmap_contains(m->sessions, id)) {
 854                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 855                         audit_id = AUDIT_SESSION_INVALID;
 856                         id = mfree(id);
 857                 }
 858         }
 859
 860         if (!id) {
 861                 do {
 862                         id = mfree(id);
 863
 864                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 865                                 return -ENOMEM;
 866
 867                 } while (hashmap_contains(m->sessions, id));
 868         }
 869
 870         /* The generated names should not clash with 'auto' or 'self' */
 871         assert(!SESSION_IS_SELF(id));
 872         assert(!SESSION_IS_AUTO(id));
 873
 874         /* If we are not watching utmp already, try again */
 875         manager_reconnect_utmp(m);
 876
 877         r = manager_add_user_by_uid(m, uid, &user);
 878         if (r < 0)
 879                 goto fail;
 880
 881         r = manager_add_session(m, id, &session);
 882         if (r < 0)
 883                 goto fail;
 884
 885         session_set_user(session, user);
 886         r = session_set_leader(session, leader);
 887         if (r < 0)
 888                 goto fail;
 889
 890         session->original_type = session->type = t;
 891         session->class = c;
 892         session->remote = remote;
 893         session->vtnr = vtnr;
 894
 895         if (!isempty(tty)) {
 896                 session->tty = strdup(tty);
 897                 if (!session->tty) {
 898                         r = -ENOMEM;
 899                         goto fail;
 900                 }
 901
 902                 session->tty_validity = TTY_FROM_PAM;
 903         }
 904
 905         if (!isempty(display)) {
 906                 session->display = strdup(display);
 907                 if (!session->display) {
 908                         r = -ENOMEM;
 909                         goto fail;
 910                 }
 911         }
 912
 913         if (!isempty(remote_user)) {
 914                 session->remote_user = strdup(remote_user);
 915                 if (!session->remote_user) {
 916                         r = -ENOMEM;
 917                         goto fail;
 918                 }
 919         }
 920
 921         if (!isempty(remote_host)) {
 922                 session->remote_host = strdup(remote_host);
 923                 if (!session->remote_host) {
 924                         r = -ENOMEM;
 925                         goto fail;
 926                 }
 927         }
 928
 929         if (!isempty(service)) {
 930                 session->service = strdup(service);
 931                 if (!session->service) {
 932                         r = -ENOMEM;
 933                         goto fail;
 934                 }
 935         }
 936
 937         if (!isempty(desktop)) {
 938                 session->desktop = strdup(desktop);
 939                 if (!session->desktop) {
 940                         r = -ENOMEM;
 941                         goto fail;
 942                 }
 943         }
 944
 945         if (seat) {
 946                 r = seat_attach_session(seat, session);
 947                 if (r < 0)
 948                         goto fail;
 949         }
 950
 951         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 952         if (r < 0)
 953                 goto fail;
 954
 955         r = session_start(session, message, error);
 956         if (r < 0)
 957                 goto fail;
 958
 959         r = sd_bus_message_exit_container(message);
 960         if (r < 0)
 961                 goto fail;
 962
 963         session->create_message = sd_bus_message_ref(message);
 964
 965         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 966          * session_send_create_reply(). */
 967
 968         return 1;
 969
 970 fail:
 971         if (session)
 972                 session_add_to_gc_queue(session);
 973
 974         if (user)
 975                 user_add_to_gc_queue(user);
 976
 977         return r;
 978 }
 979
 980 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 981         Manager *m = userdata;
 982         Session *session;
 983         const char *name;
 984         int r;
 985
 986         assert(message);
 987         assert(m);
 988
 989         r = sd_bus_message_read(message, "s", &name);
 990         if (r < 0)
 991                 return r;
 992
 993         r = manager_get_session_from_creds(m, message, name, error, &session);
 994         if (r < 0)
 995                 return r;
 996
 997         r = session_release(session);
 998         if (r < 0)
 999                 return r;
1000
1001         return sd_bus_reply_method_return(message, NULL);
1002 }
1003
1004 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1005         Manager *m = userdata;
1006         Session *session;
1007         const char *name;
1008         int r;
1009
1010         assert(message);
1011         assert(m);
1012
1013         r = sd_bus_message_read(message, "s", &name);
1014         if (r < 0)
1015                 return r;
1016
1017         r = manager_get_session_from_creds(m, message, name, error, &session);
1018         if (r < 0)
1019                 return r;
1020
1021         /* PolicyKit is done by bus_session_method_activate() */
1022
1023         return bus_session_method_activate(message, session, error);
1024 }
1025
1026 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1027         const char *session_name, *seat_name;
1028         Manager *m = userdata;
1029         Session *session;
1030         Seat *seat;
1031         int r;
1032
1033         assert(message);
1034         assert(m);
1035
1036         /* Same as ActivateSession() but refuses to work if the seat doesn't match */
1037
1038         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
1039         if (r < 0)
1040                 return r;
1041
1042         r = manager_get_session_from_creds(m, message, session_name, error, &session);
1043         if (r < 0)
1044                 return r;
1045
1046         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
1047         if (r < 0)
1048                 return r;
1049
1050         if (session->seat != seat)
1051                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT,
1052                                          "Session %s not on seat %s", session_name, seat_name);
1053
1054         r = bus_verify_polkit_async(
1055                         message,
1056                         CAP_SYS_ADMIN,
1057                         "org.freedesktop.login1.chvt",
1058                         NULL,
1059                         false,
1060                         UID_INVALID,
1061                         &m->polkit_registry,
1062                         error);
1063         if (r < 0)
1064                 return r;
1065         if (r == 0)
1066                 return 1; /* Will call us back */
1067
1068         r = session_activate(session);
1069         if (r < 0)
1070                 return r;
1071
1072         return sd_bus_reply_method_return(message, NULL);
1073 }
1074
1075 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1076         Manager *m = userdata;
1077         Session *session;
1078         const char *name;
1079         int r;
1080
1081         assert(message);
1082         assert(m);
1083
1084         r = sd_bus_message_read(message, "s", &name);
1085         if (r < 0)
1086                 return r;
1087
1088         r = manager_get_session_from_creds(m, message, name, error, &session);
1089         if (r < 0)
1090                 return r;
1091
1092         return bus_session_method_lock(message, session, error);
1093 }
1094
1095 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1096         Manager *m = userdata;
1097         int r;
1098
1099         assert(message);
1100         assert(m);
1101
1102         r = bus_verify_polkit_async(
1103                         message,
1104                         CAP_SYS_ADMIN,
1105                         "org.freedesktop.login1.lock-sessions",
1106                         NULL,
1107                         false,
1108                         UID_INVALID,
1109                         &m->polkit_registry,
1110                         error);
1111         if (r < 0)
1112                 return r;
1113         if (r == 0)
1114                 return 1; /* Will call us back */
1115
1116         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1117         if (r < 0)
1118                 return r;
1119
1120         return sd_bus_reply_method_return(message, NULL);
1121 }
1122
1123 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1124         const char *name;
1125         Manager *m = userdata;
1126         Session *session;
1127         int r;
1128
1129         assert(message);
1130         assert(m);
1131
1132         r = sd_bus_message_read(message, "s", &name);
1133         if (r < 0)
1134                 return r;
1135
1136         r = manager_get_session_from_creds(m, message, name, error, &session);
1137         if (r < 0)
1138                 return r;
1139
1140         return bus_session_method_kill(message, session, error);
1141 }
1142
1143 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1144         Manager *m = userdata;
1145         uint32_t uid;
1146         User *user;
1147         int r;
1148
1149         assert(message);
1150         assert(m);
1151
1152         r = sd_bus_message_read(message, "u", &uid);
1153         if (r < 0)
1154                 return r;
1155
1156         r = manager_get_user_from_creds(m, message, uid, error, &user);
1157         if (r < 0)
1158                 return r;
1159
1160         return bus_user_method_kill(message, user, error);
1161 }
1162
1163 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1164         Manager *m = userdata;
1165         const char *name;
1166         Session *session;
1167         int r;
1168
1169         assert(message);
1170         assert(m);
1171
1172         r = sd_bus_message_read(message, "s", &name);
1173         if (r < 0)
1174                 return r;
1175
1176         r = manager_get_session_from_creds(m, message, name, error, &session);
1177         if (r < 0)
1178                 return r;
1179
1180         return bus_session_method_terminate(message, session, error);
1181 }
1182
1183 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1184         Manager *m = userdata;
1185         uint32_t uid;
1186         User *user;
1187         int r;
1188
1189         assert(message);
1190         assert(m);
1191
1192         r = sd_bus_message_read(message, "u", &uid);
1193         if (r < 0)
1194                 return r;
1195
1196         r = manager_get_user_from_creds(m, message, uid, error, &user);
1197         if (r < 0)
1198                 return r;
1199
1200         return bus_user_method_terminate(message, user, error);
1201 }
1202
1203 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1204         Manager *m = userdata;
1205         const char *name;
1206         Seat *seat;
1207         int r;
1208
1209         assert(message);
1210         assert(m);
1211
1212         r = sd_bus_message_read(message, "s", &name);
1213         if (r < 0)
1214                 return r;
1215
1216         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1217         if (r < 0)
1218                 return r;
1219
1220         return bus_seat_method_terminate(message, seat, error);
1221 }
1222
1223 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1224         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1225         _cleanup_free_ char *cc = NULL;
1226         Manager *m = userdata;
1227         int r, b, interactive;
1228         struct passwd *pw;
1229         const char *path;
1230         uint32_t uid, auth_uid;
1231
1232         assert(message);
1233         assert(m);
1234
1235         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1236         if (r < 0)
1237                 return r;
1238
1239         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1240                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1241         if (r < 0)
1242                 return r;
1243
1244         if (!uid_is_valid(uid)) {
1245                 /* Note that we get the owner UID of the session or user unit,
1246                  * not the actual client UID here! */
1247                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1248                 if (r < 0)
1249                         return r;
1250         }
1251
1252         /* owner_uid is racy, so for authorization we must use euid */
1253         r = sd_bus_creds_get_euid(creds, &auth_uid);
1254         if (r < 0)
1255                 return r;
1256
1257         errno = 0;
1258         pw = getpwuid(uid);
1259         if (!pw)
1260                 return errno_or_else(ENOENT);
1261
1262         r = bus_verify_polkit_async(
1263                         message,
1264                         CAP_SYS_ADMIN,
1265                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1266                                           "org.freedesktop.login1.set-user-linger",
1267                         NULL,
1268                         interactive,
1269                         UID_INVALID,
1270                         &m->polkit_registry,
1271                         error);
1272         if (r < 0)
1273                 return r;
1274         if (r == 0)
1275                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1276
1277         (void) mkdir_p_label("/var/lib/systemd", 0755);
1278         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1279         if (r < 0)
1280                 return r;
1281
1282         cc = cescape(pw->pw_name);
1283         if (!cc)
1284                 return -ENOMEM;
1285
1286         path = strjoina("/var/lib/systemd/linger/", cc);
1287         if (b) {
1288                 User *u;
1289
1290                 r = touch(path);
1291                 if (r < 0)
1292                         return r;
1293
1294                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1295                         user_start(u);
1296
1297         } else {
1298                 User *u;
1299
1300                 r = unlink(path);
1301                 if (r < 0 && errno != ENOENT)
1302                         return -errno;
1303
1304                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1305                 if (u)
1306                         user_add_to_gc_queue(u);
1307         }
1308
1309         return sd_bus_reply_method_return(message, NULL);
1310 }
1311
1312 static int trigger_device(Manager *m, sd_device *d) {
1313         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
1314         int r;
1315
1316         assert(m);
1317
1318         r = sd_device_enumerator_new(&e);
1319         if (r < 0)
1320                 return r;
1321
1322         r = sd_device_enumerator_allow_uninitialized(e);
1323         if (r < 0)
1324                 return r;
1325
1326         if (d) {
1327                 r = sd_device_enumerator_add_match_parent(e, d);
1328                 if (r < 0)
1329                         return r;
1330         }
1331
1332         FOREACH_DEVICE(e, d) {
1333                 _cleanup_free_ char *t = NULL;
1334                 const char *p;
1335
1336                 r = sd_device_get_syspath(d, &p);
1337                 if (r < 0)
1338                         return r;
1339
1340                 t = path_join(p, "uevent");
1341                 if (!t)
1342                         return -ENOMEM;
1343
1344                 (void) write_string_file(t, "change", WRITE_STRING_FILE_DISABLE_BUFFER);
1345         }
1346
1347         return 0;
1348 }
1349
1350 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1351         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
1352         _cleanup_free_ char *rule = NULL, *file = NULL;
1353         const char *id_for_seat;
1354         int r;
1355
1356         assert(m);
1357         assert(seat);
1358         assert(sysfs);
1359
1360         r = sd_device_new_from_syspath(&d, sysfs);
1361         if (r < 0)
1362                 return r;
1363
1364         if (sd_device_has_tag(d, "seat") <= 0)
1365                 return -ENODEV;
1366
1367         if (sd_device_get_property_value(d, "ID_FOR_SEAT", &id_for_seat) < 0)
1368                 return -ENODEV;
1369
1370         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1371                 return -ENOMEM;
1372
1373         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1374                 return -ENOMEM;
1375
1376         (void) mkdir_p_label("/etc/udev/rules.d", 0755);
1377         r = write_string_file_atomic_label(file, rule);
1378         if (r < 0)
1379                 return r;
1380
1381         return trigger_device(m, d);
1382 }
1383
1384 static int flush_devices(Manager *m) {
1385         _cleanup_closedir_ DIR *d;
1386
1387         assert(m);
1388
1389         d = opendir("/etc/udev/rules.d");
1390         if (!d) {
1391                 if (errno != ENOENT)
1392                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1393         } else {
1394                 struct dirent *de;
1395
1396                 FOREACH_DIRENT_ALL(de, d, break) {
1397                         dirent_ensure_type(d, de);
1398                         if (!dirent_is_file(de))
1399                                 continue;
1400
1401                         if (!startswith(de->d_name, "72-seat-"))
1402                                 continue;
1403
1404                         if (!endswith(de->d_name, ".rules"))
1405                                 continue;
1406
1407                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1408                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1409                 }
1410         }
1411
1412         return trigger_device(m, NULL);
1413 }
1414
1415 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1416         const char *sysfs, *seat;
1417         Manager *m = userdata;
1418         int interactive, r;
1419
1420         assert(message);
1421         assert(m);
1422
1423         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1424         if (r < 0)
1425                 return r;
1426
1427         if (!path_is_normalized(sysfs))
1428                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not normalized", sysfs);
1429         if (!path_startswith(sysfs, "/sys"))
1430                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1431
1432         if (SEAT_IS_SELF(seat) || SEAT_IS_AUTO(seat)) {
1433                 Seat *found;
1434
1435                 r = manager_get_seat_from_creds(m, message, seat, error, &found);
1436                 if (r < 0)
1437                         return r;
1438
1439                 seat = found->id;
1440
1441         } else if (!seat_name_is_valid(seat)) /* Note that a seat does not have to exist yet for this operation to succeed */
1442                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat name %s is not valid", seat);
1443
1444         r = bus_verify_polkit_async(
1445                         message,
1446                         CAP_SYS_ADMIN,
1447                         "org.freedesktop.login1.attach-device",
1448                         NULL,
1449                         interactive,
1450                         UID_INVALID,
1451                         &m->polkit_registry,
1452                         error);
1453         if (r < 0)
1454                 return r;
1455         if (r == 0)
1456                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1457
1458         r = attach_device(m, seat, sysfs);
1459         if (r < 0)
1460                 return r;
1461
1462         return sd_bus_reply_method_return(message, NULL);
1463 }
1464
1465 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1466         Manager *m = userdata;
1467         int interactive, r;
1468
1469         assert(message);
1470         assert(m);
1471
1472         r = sd_bus_message_read(message, "b", &interactive);
1473         if (r < 0)
1474                 return r;
1475
1476         r = bus_verify_polkit_async(
1477                         message,
1478                         CAP_SYS_ADMIN,
1479                         "org.freedesktop.login1.flush-devices",
1480                         NULL,
1481                         interactive,
1482                         UID_INVALID,
1483                         &m->polkit_registry,
1484                         error);
1485         if (r < 0)
1486                 return r;
1487         if (r == 0)
1488                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1489
1490         r = flush_devices(m);
1491         if (r < 0)
1492                 return r;
1493
1494         return sd_bus_reply_method_return(message, NULL);
1495 }
1496
1497 static int have_multiple_sessions(
1498                 Manager *m,
1499                 uid_t uid) {
1500
1501         Session *session;
1502         Iterator i;
1503
1504         assert(m);
1505
1506         /* Check for other users' sessions. Greeter sessions do not
1507          * count, and non-login sessions do not count either. */
1508         HASHMAP_FOREACH(session, m->sessions, i)
1509                 if (session->class == SESSION_USER &&
1510                     session->user->user_record->uid != uid)
1511                         return true;
1512
1513         return false;
1514 }
1515
1516 static int bus_manager_log_shutdown(
1517                 Manager *m,
1518                 const char *unit_name) {
1519
1520         const char *p, *q;
1521
1522         assert(m);
1523         assert(unit_name);
1524
1525         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1526                 p = "MESSAGE=System is powering down";
1527                 q = "SHUTDOWN=power-off";
1528         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1529                 p = "MESSAGE=System is rebooting";
1530                 q = "SHUTDOWN=reboot";
1531         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1532                 p = "MESSAGE=System is halting";
1533                 q = "SHUTDOWN=halt";
1534         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1535                 p = "MESSAGE=System is rebooting with kexec";
1536                 q = "SHUTDOWN=kexec";
1537         } else {
1538                 p = "MESSAGE=System is shutting down";
1539                 q = NULL;
1540         }
1541
1542         if (isempty(m->wall_message))
1543                 p = strjoina(p, ".");
1544         else
1545                 p = strjoina(p, " (", m->wall_message, ").");
1546
1547         return log_struct(LOG_NOTICE,
1548                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1549                           p,
1550                           q);
1551 }
1552
1553 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1554         Manager *m = userdata;
1555
1556         assert(e);
1557         assert(m);
1558
1559         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1560         return 0;
1561 }
1562
1563 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1564         int r;
1565
1566         assert(m);
1567
1568         if (until <= now(CLOCK_MONOTONIC))
1569                 return 0;
1570
1571         /* We want to ignore the lid switch for a while after each
1572          * suspend, and after boot-up. Hence let's install a timer for
1573          * this. As long as the event source exists we ignore the lid
1574          * switch. */
1575
1576         if (m->lid_switch_ignore_event_source) {
1577                 usec_t u;
1578
1579                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1580                 if (r < 0)
1581                         return r;
1582
1583                 if (until <= u)
1584                         return 0;
1585
1586                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1587         } else
1588                 r = sd_event_add_time(
1589                                 m->event,
1590                                 &m->lid_switch_ignore_event_source,
1591                                 CLOCK_MONOTONIC,
1592                                 until, 0,
1593                                 lid_switch_ignore_handler, m);
1594
1595         return r;
1596 }
1597
1598 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1599         int active = _active;
1600
1601         assert(m);
1602         assert(IN_SET(w, INHIBIT_SHUTDOWN, INHIBIT_SLEEP));
1603
1604         return sd_bus_emit_signal(m->bus,
1605                                   "/org/freedesktop/login1",
1606                                   "org.freedesktop.login1.Manager",
1607                                   w == INHIBIT_SHUTDOWN ? "PrepareForShutdown" : "PrepareForSleep",
1608                                   "b",
1609                                   active);
1610 }
1611
1612 static int execute_shutdown_or_sleep(
1613                 Manager *m,
1614                 InhibitWhat w,
1615                 const char *unit_name,
1616                 sd_bus_error *error) {
1617
1618         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1619         const char *p;
1620         int r;
1621
1622         assert(m);
1623         assert(w > 0);
1624         assert(w < _INHIBIT_WHAT_MAX);
1625         assert(unit_name);
1626
1627         if (w == INHIBIT_SHUTDOWN)
1628                 bus_manager_log_shutdown(m, unit_name);
1629
1630         r = bus_call_method(
1631                         m->bus,
1632                         bus_systemd_mgr,
1633                         "StartUnit",
1634                         error,
1635                         &reply,
1636                         "ss", unit_name, "replace-irreversibly");
1637         if (r < 0)
1638                 goto error;
1639
1640         r = sd_bus_message_read(reply, "o", &p);
1641         if (r < 0)
1642                 goto error;
1643
1644         r = free_and_strdup(&m->action_job, p);
1645         if (r < 0)
1646                 goto error;
1647
1648         m->action_unit = unit_name;
1649         m->action_what = w;
1650
1651         /* Make sure the lid switch is ignored for a while */
1652         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1653
1654         return 0;
1655
1656 error:
1657         /* Tell people that they now may take a lock again */
1658         (void) send_prepare_for(m, w, false);
1659
1660         return r;
1661 }
1662
1663 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1664
1665         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1666         Inhibitor *offending = NULL;
1667         int r;
1668
1669         assert(manager);
1670
1671         if (manager->action_what == 0 || manager->action_job)
1672                 return 0;
1673
1674         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1675                 _cleanup_free_ char *comm = NULL, *u = NULL;
1676
1677                 if (!timeout)
1678                         return 0;
1679
1680                 (void) get_process_comm(offending->pid, &comm);
1681                 u = uid_to_name(offending->uid);
1682
1683                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1684                            offending->uid, strna(u),
1685                            offending->pid, strna(comm));
1686         }
1687
1688         /* Actually do the operation */
1689         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1690         if (r < 0) {
1691                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1692                             bus_error_message(&error, r));
1693
1694                 manager->action_unit = NULL;
1695                 manager->action_what = 0;
1696                 return r;
1697         }
1698
1699         return 1;
1700 }
1701
1702 static int manager_inhibit_timeout_handler(
1703                         sd_event_source *s,
1704                         uint64_t usec,
1705                         void *userdata) {
1706
1707         Manager *manager = userdata;
1708         int r;
1709
1710         assert(manager);
1711         assert(manager->inhibit_timeout_source == s);
1712
1713         r = manager_dispatch_delayed(manager, true);
1714         return (r < 0) ? r : 0;
1715 }
1716
1717 static int delay_shutdown_or_sleep(
1718                 Manager *m,
1719                 InhibitWhat w,
1720                 const char *unit_name) {
1721
1722         int r;
1723
1724         assert(m);
1725         assert(w >= 0);
1726         assert(w < _INHIBIT_WHAT_MAX);
1727         assert(unit_name);
1728
1729         if (m->inhibit_timeout_source) {
1730                 r = sd_event_source_set_time_relative(m->inhibit_timeout_source, m->inhibit_delay_max);
1731                 if (r < 0)
1732                         return log_error_errno(r, "sd_event_source_set_time_relative() failed: %m");
1733
1734                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1735                 if (r < 0)
1736                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1737         } else {
1738                 r = sd_event_add_time_relative(
1739                                 m->event,
1740                                 &m->inhibit_timeout_source,
1741                                 CLOCK_MONOTONIC, m->inhibit_delay_max, 0,
1742                                 manager_inhibit_timeout_handler, m);
1743                 if (r < 0)
1744                         return r;
1745         }
1746
1747         m->action_unit = unit_name;
1748         m->action_what = w;
1749
1750         return 0;
1751 }
1752
1753 int bus_manager_shutdown_or_sleep_now_or_later(
1754                 Manager *m,
1755                 const char *unit_name,
1756                 InhibitWhat w,
1757                 sd_bus_error *error) {
1758
1759         _cleanup_free_ char *load_state = NULL;
1760         bool delayed;
1761         int r;
1762
1763         assert(m);
1764         assert(unit_name);
1765         assert(w > 0);
1766         assert(w < _INHIBIT_WHAT_MAX);
1767         assert(!m->action_job);
1768
1769         r = unit_load_state(m->bus, unit_name, &load_state);
1770         if (r < 0)
1771                 return r;
1772
1773         if (!streq(load_state, "loaded"))
1774                 return log_notice_errno(SYNTHETIC_ERRNO(EACCES),
1775                                         "Unit %s is %s, refusing operation.",
1776                                         unit_name, load_state);
1777
1778         /* Tell everybody to prepare for shutdown/sleep */
1779         (void) send_prepare_for(m, w, true);
1780
1781         delayed =
1782                 m->inhibit_delay_max > 0 &&
1783                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1784
1785         if (delayed)
1786                 /* Shutdown is delayed, keep in mind what we
1787                  * want to do, and start a timeout */
1788                 r = delay_shutdown_or_sleep(m, w, unit_name);
1789         else
1790                 /* Shutdown is not delayed, execute it
1791                  * immediately */
1792                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1793
1794         return r;
1795 }
1796
1797 static int verify_shutdown_creds(
1798                 Manager *m,
1799                 sd_bus_message *message,
1800                 InhibitWhat w,
1801                 bool interactive,
1802                 const char *action,
1803                 const char *action_multiple_sessions,
1804                 const char *action_ignore_inhibit,
1805                 sd_bus_error *error) {
1806
1807         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1808         bool multiple_sessions, blocked;
1809         uid_t uid;
1810         int r;
1811
1812         assert(m);
1813         assert(message);
1814         assert(w >= 0);
1815         assert(w <= _INHIBIT_WHAT_MAX);
1816
1817         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1818         if (r < 0)
1819                 return r;
1820
1821         r = sd_bus_creds_get_euid(creds, &uid);
1822         if (r < 0)
1823                 return r;
1824
1825         r = have_multiple_sessions(m, uid);
1826         if (r < 0)
1827                 return r;
1828
1829         multiple_sessions = r > 0;
1830         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1831
1832         if (multiple_sessions && action_multiple_sessions) {
1833                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1834                 if (r < 0)
1835                         return r;
1836                 if (r == 0)
1837                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1838         }
1839
1840         if (blocked && action_ignore_inhibit) {
1841                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1842                 if (r < 0)
1843                         return r;
1844                 if (r == 0)
1845                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1846         }
1847
1848         if (!multiple_sessions && !blocked && action) {
1849                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1850                 if (r < 0)
1851                         return r;
1852                 if (r == 0)
1853                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1854         }
1855
1856         return 0;
1857 }
1858
1859 static int method_do_shutdown_or_sleep(
1860                 Manager *m,
1861                 sd_bus_message *message,
1862                 const char *unit_name,
1863                 InhibitWhat w,
1864                 const char *action,
1865                 const char *action_multiple_sessions,
1866                 const char *action_ignore_inhibit,
1867                 const char *sleep_verb,
1868                 sd_bus_error *error) {
1869
1870         int interactive, r;
1871
1872         assert(m);
1873         assert(message);
1874         assert(unit_name);
1875         assert(w >= 0);
1876         assert(w <= _INHIBIT_WHAT_MAX);
1877
1878         r = sd_bus_message_read(message, "b", &interactive);
1879         if (r < 0)
1880                 return r;
1881
1882         /* Don't allow multiple jobs being executed at the same time */
1883         if (m->action_what > 0)
1884                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
1885                                          "There's already a shutdown or sleep operation in progress");
1886
1887         if (sleep_verb) {
1888                 r = can_sleep(sleep_verb);
1889                 if (r == -ENOSPC)
1890                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1891                                                 "Not enough swap space for hibernation");
1892                 if (r == 0)
1893                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1894                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1895                 if (r < 0)
1896                         return r;
1897         }
1898
1899         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1900                                   action_ignore_inhibit, error);
1901         if (r != 0)
1902                 return r;
1903
1904         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1905         if (r < 0)
1906                 return r;
1907
1908         return sd_bus_reply_method_return(message, NULL);
1909 }
1910
1911 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1912         Manager *m = userdata;
1913
1914         return method_do_shutdown_or_sleep(
1915                         m, message,
1916                         SPECIAL_POWEROFF_TARGET,
1917                         INHIBIT_SHUTDOWN,
1918                         "org.freedesktop.login1.power-off",
1919                         "org.freedesktop.login1.power-off-multiple-sessions",
1920                         "org.freedesktop.login1.power-off-ignore-inhibit",
1921                         NULL,
1922                         error);
1923 }
1924
1925 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1926         Manager *m = userdata;
1927
1928         return method_do_shutdown_or_sleep(
1929                         m, message,
1930                         SPECIAL_REBOOT_TARGET,
1931                         INHIBIT_SHUTDOWN,
1932                         "org.freedesktop.login1.reboot",
1933                         "org.freedesktop.login1.reboot-multiple-sessions",
1934                         "org.freedesktop.login1.reboot-ignore-inhibit",
1935                         NULL,
1936                         error);
1937 }
1938
1939 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1940         Manager *m = userdata;
1941
1942         return method_do_shutdown_or_sleep(
1943                         m, message,
1944                         SPECIAL_HALT_TARGET,
1945                         INHIBIT_SHUTDOWN,
1946                         "org.freedesktop.login1.halt",
1947                         "org.freedesktop.login1.halt-multiple-sessions",
1948                         "org.freedesktop.login1.halt-ignore-inhibit",
1949                         NULL,
1950                         error);
1951 }
1952
1953 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1954         Manager *m = userdata;
1955
1956         return method_do_shutdown_or_sleep(
1957                         m, message,
1958                         SPECIAL_SUSPEND_TARGET,
1959                         INHIBIT_SLEEP,
1960                         "org.freedesktop.login1.suspend",
1961                         "org.freedesktop.login1.suspend-multiple-sessions",
1962                         "org.freedesktop.login1.suspend-ignore-inhibit",
1963                         "suspend",
1964                         error);
1965 }
1966
1967 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1968         Manager *m = userdata;
1969
1970         return method_do_shutdown_or_sleep(
1971                         m, message,
1972                         SPECIAL_HIBERNATE_TARGET,
1973                         INHIBIT_SLEEP,
1974                         "org.freedesktop.login1.hibernate",
1975                         "org.freedesktop.login1.hibernate-multiple-sessions",
1976                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1977                         "hibernate",
1978                         error);
1979 }
1980
1981 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1982         Manager *m = userdata;
1983
1984         return method_do_shutdown_or_sleep(
1985                         m, message,
1986                         SPECIAL_HYBRID_SLEEP_TARGET,
1987                         INHIBIT_SLEEP,
1988                         "org.freedesktop.login1.hibernate",
1989                         "org.freedesktop.login1.hibernate-multiple-sessions",
1990                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1991                         "hybrid-sleep",
1992                         error);
1993 }
1994
1995 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1996         Manager *m = userdata;
1997
1998         return method_do_shutdown_or_sleep(
1999                         m, message,
2000                         SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
2001                         INHIBIT_SLEEP,
2002                         "org.freedesktop.login1.hibernate",
2003                         "org.freedesktop.login1.hibernate-multiple-sessions",
2004                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2005                         "hybrid-sleep",
2006                         error);
2007 }
2008
2009 static int nologin_timeout_handler(
2010                         sd_event_source *s,
2011                         uint64_t usec,
2012                         void *userdata) {
2013
2014         Manager *m = userdata;
2015
2016         log_info("Creating /run/nologin, blocking further logins...");
2017
2018         m->unlink_nologin =
2019                 create_shutdown_run_nologin_or_warn() >= 0;
2020
2021         return 0;
2022 }
2023
2024 static int update_schedule_file(Manager *m) {
2025         _cleanup_free_ char *temp_path = NULL;
2026         _cleanup_fclose_ FILE *f = NULL;
2027         int r;
2028
2029         assert(m);
2030
2031         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
2032         if (r < 0)
2033                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
2034
2035         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
2036         if (r < 0)
2037                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
2038
2039         (void) fchmod(fileno(f), 0644);
2040
2041         fprintf(f,
2042                 "USEC="USEC_FMT"\n"
2043                 "WARN_WALL=%i\n"
2044                 "MODE=%s\n",
2045                 m->scheduled_shutdown_timeout,
2046                 m->enable_wall_messages,
2047                 m->scheduled_shutdown_type);
2048
2049         if (!isempty(m->wall_message)) {
2050                 _cleanup_free_ char *t;
2051
2052                 t = cescape(m->wall_message);
2053                 if (!t) {
2054                         r = -ENOMEM;
2055                         goto fail;
2056                 }
2057
2058                 fprintf(f, "WALL_MESSAGE=%s\n", t);
2059         }
2060
2061         r = fflush_and_check(f);
2062         if (r < 0)
2063                 goto fail;
2064
2065         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2066                 r = -errno;
2067                 goto fail;
2068         }
2069
2070         return 0;
2071
2072 fail:
2073         (void) unlink(temp_path);
2074         (void) unlink("/run/systemd/shutdown/scheduled");
2075
2076         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2077 }
2078
2079 static void reset_scheduled_shutdown(Manager *m) {
2080         assert(m);
2081
2082         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2083         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
2084         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
2085
2086         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
2087         m->scheduled_shutdown_timeout = 0;
2088         m->shutdown_dry_run = false;
2089
2090         if (m->unlink_nologin) {
2091                 (void) unlink_or_warn("/run/nologin");
2092                 m->unlink_nologin = false;
2093         }
2094
2095         (void) unlink("/run/systemd/shutdown/scheduled");
2096 }
2097
2098 static int manager_scheduled_shutdown_handler(
2099                         sd_event_source *s,
2100                         uint64_t usec,
2101                         void *userdata) {
2102
2103         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2104         Manager *m = userdata;
2105         const char *target;
2106         int r;
2107
2108         assert(m);
2109
2110         if (isempty(m->scheduled_shutdown_type))
2111                 return 0;
2112
2113         if (streq(m->scheduled_shutdown_type, "poweroff"))
2114                 target = SPECIAL_POWEROFF_TARGET;
2115         else if (streq(m->scheduled_shutdown_type, "reboot"))
2116                 target = SPECIAL_REBOOT_TARGET;
2117         else if (streq(m->scheduled_shutdown_type, "halt"))
2118                 target = SPECIAL_HALT_TARGET;
2119         else
2120                 assert_not_reached("unexpected shutdown type");
2121
2122         /* Don't allow multiple jobs being executed at the same time */
2123         if (m->action_what > 0) {
2124                 r = -EALREADY;
2125                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2126                 goto error;
2127         }
2128
2129         if (m->shutdown_dry_run) {
2130                 /* We do not process delay inhibitors here.  Otherwise, we
2131                  * would have to be considered "in progress" (like the check
2132                  * above) for some seconds after our admin has seen the final
2133                  * wall message. */
2134
2135                 bus_manager_log_shutdown(m, target);
2136                 log_info("Running in dry run, suppressing action.");
2137                 reset_scheduled_shutdown(m);
2138
2139                 return 0;
2140         }
2141
2142         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2143         if (r < 0) {
2144                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2145                 goto error;
2146         }
2147
2148         return 0;
2149
2150 error:
2151         reset_scheduled_shutdown(m);
2152         return r;
2153 }
2154
2155 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2156         Manager *m = userdata;
2157         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2158         const char *action_multiple_sessions = NULL;
2159         const char *action_ignore_inhibit = NULL;
2160         const char *action = NULL;
2161         uint64_t elapse;
2162         char *type;
2163         int r;
2164         bool dry_run = false;
2165
2166         assert(m);
2167         assert(message);
2168
2169         r = sd_bus_message_read(message, "st", &type, &elapse);
2170         if (r < 0)
2171                 return r;
2172
2173         if (startswith(type, "dry-")) {
2174                 type += 4;
2175                 dry_run = true;
2176         }
2177
2178         if (streq(type, "poweroff")) {
2179                 action = "org.freedesktop.login1.power-off";
2180                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2181                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2182         } else if (streq(type, "reboot")) {
2183                 action = "org.freedesktop.login1.reboot";
2184                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2185                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2186         } else if (streq(type, "halt")) {
2187                 action = "org.freedesktop.login1.halt";
2188                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2189                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2190         } else
2191                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2192
2193         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2194                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2195         if (r != 0)
2196                 return r;
2197
2198         if (m->scheduled_shutdown_timeout_source) {
2199                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2200                 if (r < 0)
2201                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2202
2203                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2204                 if (r < 0)
2205                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2206         } else {
2207                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2208                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2209                 if (r < 0)
2210                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2211         }
2212
2213         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2214         if (r < 0) {
2215                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2216                 return log_oom();
2217         }
2218
2219         m->shutdown_dry_run = dry_run;
2220
2221         if (m->nologin_timeout_source) {
2222                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2223                 if (r < 0)
2224                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2225
2226                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2227                 if (r < 0)
2228                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2229         } else {
2230                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2231                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2232                 if (r < 0)
2233                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2234         }
2235
2236         m->scheduled_shutdown_timeout = elapse;
2237
2238         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2239         if (r >= 0) {
2240                 const char *tty = NULL;
2241
2242                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2243                 (void) sd_bus_creds_get_tty(creds, &tty);
2244
2245                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2246                 if (r < 0) {
2247                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2248                         return log_oom();
2249                 }
2250         }
2251
2252         r = manager_setup_wall_message_timer(m);
2253         if (r < 0)
2254                 return r;
2255
2256         r = update_schedule_file(m);
2257         if (r < 0)
2258                 return r;
2259
2260         return sd_bus_reply_method_return(message, NULL);
2261 }
2262
2263 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2264         Manager *m = userdata;
2265         bool cancelled;
2266
2267         assert(m);
2268         assert(message);
2269
2270         cancelled = m->scheduled_shutdown_type != NULL;
2271         reset_scheduled_shutdown(m);
2272
2273         if (cancelled && m->enable_wall_messages) {
2274                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2275                 _cleanup_free_ char *username = NULL;
2276                 const char *tty = NULL;
2277                 uid_t uid = 0;
2278                 int r;
2279
2280                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2281                 if (r >= 0) {
2282                         (void) sd_bus_creds_get_uid(creds, &uid);
2283                         (void) sd_bus_creds_get_tty(creds, &tty);
2284                 }
2285
2286                 username = uid_to_name(uid);
2287                 utmp_wall("The system shutdown has been cancelled",
2288                           username, tty, logind_wall_tty_filter, m);
2289         }
2290
2291         return sd_bus_reply_method_return(message, "b", cancelled);
2292 }
2293
2294 static int method_can_shutdown_or_sleep(
2295                 Manager *m,
2296                 sd_bus_message *message,
2297                 InhibitWhat w,
2298                 const char *action,
2299                 const char *action_multiple_sessions,
2300                 const char *action_ignore_inhibit,
2301                 const char *sleep_verb,
2302                 sd_bus_error *error) {
2303
2304         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2305         HandleAction handle;
2306         bool multiple_sessions, challenge, blocked;
2307         const char *result = NULL;
2308         uid_t uid;
2309         int r;
2310
2311         assert(m);
2312         assert(message);
2313         assert(w >= 0);
2314         assert(w <= _INHIBIT_WHAT_MAX);
2315         assert(action);
2316         assert(action_multiple_sessions);
2317         assert(action_ignore_inhibit);
2318
2319         if (sleep_verb) {
2320                 r = can_sleep(sleep_verb);
2321                 if (IN_SET(r,  0, -ENOSPC))
2322                         return sd_bus_reply_method_return(message, "s", "na");
2323                 if (r < 0)
2324                         return r;
2325         }
2326
2327         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2328         if (r < 0)
2329                 return r;
2330
2331         r = sd_bus_creds_get_euid(creds, &uid);
2332         if (r < 0)
2333                 return r;
2334
2335         r = have_multiple_sessions(m, uid);
2336         if (r < 0)
2337                 return r;
2338
2339         multiple_sessions = r > 0;
2340         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2341
2342         handle = handle_action_from_string(sleep_verb);
2343         if (handle >= 0) {
2344                 const char *target;
2345
2346                 target = manager_target_for_action(handle);
2347                 if (target) {
2348                         _cleanup_free_ char *load_state = NULL;
2349
2350                         r = unit_load_state(m->bus, target, &load_state);
2351                         if (r < 0)
2352                                 return r;
2353
2354                         if (!streq(load_state, "loaded")) {
2355                                 result = "no";
2356                                 goto finish;
2357                         }
2358                 }
2359         }
2360
2361         if (multiple_sessions) {
2362                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2363                 if (r < 0)
2364                         return r;
2365
2366                 if (r > 0)
2367                         result = "yes";
2368                 else if (challenge)
2369                         result = "challenge";
2370                 else
2371                         result = "no";
2372         }
2373
2374         if (blocked) {
2375                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2376                 if (r < 0)
2377                         return r;
2378
2379                 if (r > 0) {
2380                         if (!result)
2381                                 result = "yes";
2382                 } else if (challenge) {
2383                         if (!result || streq(result, "yes"))
2384                                 result = "challenge";
2385                 } else
2386                         result = "no";
2387         }
2388
2389         if (!multiple_sessions && !blocked) {
2390                 /* If neither inhibit nor multiple sessions
2391                  * apply then just check the normal policy */
2392
2393                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2394                 if (r < 0)
2395                         return r;
2396
2397                 if (r > 0)
2398                         result = "yes";
2399                 else if (challenge)
2400                         result = "challenge";
2401                 else
2402                         result = "no";
2403         }
2404
2405  finish:
2406         return sd_bus_reply_method_return(message, "s", result);
2407 }
2408
2409 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2410         Manager *m = userdata;
2411
2412         return method_can_shutdown_or_sleep(
2413                         m, message,
2414                         INHIBIT_SHUTDOWN,
2415                         "org.freedesktop.login1.power-off",
2416                         "org.freedesktop.login1.power-off-multiple-sessions",
2417                         "org.freedesktop.login1.power-off-ignore-inhibit",
2418                         NULL,
2419                         error);
2420 }
2421
2422 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2423         Manager *m = userdata;
2424
2425         return method_can_shutdown_or_sleep(
2426                         m, message,
2427                         INHIBIT_SHUTDOWN,
2428                         "org.freedesktop.login1.reboot",
2429                         "org.freedesktop.login1.reboot-multiple-sessions",
2430                         "org.freedesktop.login1.reboot-ignore-inhibit",
2431                         NULL,
2432                         error);
2433 }
2434
2435 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2436         Manager *m = userdata;
2437
2438         return method_can_shutdown_or_sleep(
2439                         m, message,
2440                         INHIBIT_SHUTDOWN,
2441                         "org.freedesktop.login1.halt",
2442                         "org.freedesktop.login1.halt-multiple-sessions",
2443                         "org.freedesktop.login1.halt-ignore-inhibit",
2444                         NULL,
2445                         error);
2446 }
2447
2448 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2449         Manager *m = userdata;
2450
2451         return method_can_shutdown_or_sleep(
2452                         m, message,
2453                         INHIBIT_SLEEP,
2454                         "org.freedesktop.login1.suspend",
2455                         "org.freedesktop.login1.suspend-multiple-sessions",
2456                         "org.freedesktop.login1.suspend-ignore-inhibit",
2457                         "suspend",
2458                         error);
2459 }
2460
2461 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2462         Manager *m = userdata;
2463
2464         return method_can_shutdown_or_sleep(
2465                         m, message,
2466                         INHIBIT_SLEEP,
2467                         "org.freedesktop.login1.hibernate",
2468                         "org.freedesktop.login1.hibernate-multiple-sessions",
2469                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2470                         "hibernate",
2471                         error);
2472 }
2473
2474 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2475         Manager *m = userdata;
2476
2477         return method_can_shutdown_or_sleep(
2478                         m, message,
2479                         INHIBIT_SLEEP,
2480                         "org.freedesktop.login1.hibernate",
2481                         "org.freedesktop.login1.hibernate-multiple-sessions",
2482                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2483                         "hybrid-sleep",
2484                         error);
2485 }
2486
2487 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2488         Manager *m = userdata;
2489
2490         return method_can_shutdown_or_sleep(
2491                         m, message,
2492                         INHIBIT_SLEEP,
2493                         "org.freedesktop.login1.hibernate",
2494                         "org.freedesktop.login1.hibernate-multiple-sessions",
2495                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2496                         "suspend-then-hibernate",
2497                         error);
2498 }
2499
2500 static int property_get_reboot_parameter(
2501                 sd_bus *bus,
2502                 const char *path,
2503                 const char *interface,
2504                 const char *property,
2505                 sd_bus_message *reply,
2506                 void *userdata,
2507                 sd_bus_error *error) {
2508         _cleanup_free_ char *parameter = NULL;
2509         int r;
2510
2511         assert(bus);
2512         assert(reply);
2513         assert(userdata);
2514
2515         r = read_reboot_parameter(&parameter);
2516         if (r < 0)
2517                 return r;
2518
2519         return sd_bus_message_append(reply, "s", parameter);
2520 }
2521
2522 static int method_set_reboot_parameter(
2523                 sd_bus_message *message,
2524                 void *userdata,
2525                 sd_bus_error *error) {
2526
2527         Manager *m = userdata;
2528         const char *arg;
2529         int r;
2530
2531         assert(message);
2532         assert(m);
2533
2534         r = sd_bus_message_read(message, "s", &arg);
2535         if (r < 0)
2536                 return r;
2537
2538         r = detect_container();
2539         if (r < 0)
2540                 return r;
2541         if (r > 0)
2542                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
2543                                          "Reboot parameter not supported in containers, refusing.");
2544
2545         r = bus_verify_polkit_async(message,
2546                                     CAP_SYS_ADMIN,
2547                                     "org.freedesktop.login1.set-reboot-parameter",
2548                                     NULL,
2549                                     false,
2550                                     UID_INVALID,
2551                                     &m->polkit_registry,
2552                                     error);
2553         if (r < 0)
2554                 return r;
2555         if (r == 0)
2556                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2557
2558         r = update_reboot_parameter_and_warn(arg, false);
2559         if (r < 0)
2560                 return r;
2561
2562         return sd_bus_reply_method_return(message, NULL);
2563 }
2564
2565 static int method_can_reboot_parameter(
2566                 sd_bus_message *message,
2567                 void *userdata,
2568                 sd_bus_error *error) {
2569
2570         _unused_ Manager *m = userdata;
2571         int r;
2572
2573         assert(message);
2574         assert(m);
2575
2576         r = detect_container();
2577         if (r < 0)
2578                 return r;
2579         if (r > 0) /* Inside containers, specifying a reboot parameter, doesn't make much sense */
2580                 return sd_bus_reply_method_return(message, "s", "na");
2581
2582         return return_test_polkit(
2583                         message,
2584                         CAP_SYS_ADMIN,
2585                         "org.freedesktop.login1.set-reboot-parameter",
2586                         NULL,
2587                         UID_INVALID,
2588                         error);
2589 }
2590
2591 static int property_get_reboot_to_firmware_setup(
2592                 sd_bus *bus,
2593                 const char *path,
2594                 const char *interface,
2595                 const char *property,
2596                 sd_bus_message *reply,
2597                 void *userdata,
2598                 sd_bus_error *error) {
2599         int r;
2600
2601         assert(bus);
2602         assert(reply);
2603         assert(userdata);
2604
2605         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2606         if (r == -ENXIO) {
2607                 /* EFI case: let's see what is currently configured in the EFI variables */
2608                 r = efi_get_reboot_to_firmware();
2609                 if (r < 0 && r != -EOPNOTSUPP)
2610                         log_warning_errno(r, "Failed to determine reboot-to-firmware-setup state: %m");
2611         } else if (r < 0)
2612                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2613         else if (r > 0) {
2614                 /* Non-EFI case: let's see whether /run/systemd/reboot-to-firmware-setup exists. */
2615                 if (access("/run/systemd/reboot-to-firmware-setup", F_OK) < 0) {
2616                         if (errno != ENOENT)
2617                                 log_warning_errno(errno, "Failed to check whether /run/systemd/reboot-to-firmware-setup exists: %m");
2618
2619                         r = false;
2620                 } else
2621                         r = true;
2622         }
2623
2624         return sd_bus_message_append(reply, "b", r > 0);
2625 }
2626
2627 static int method_set_reboot_to_firmware_setup(
2628                 sd_bus_message *message,
2629                 void *userdata,
2630                 sd_bus_error *error) {
2631
2632         Manager *m = userdata;
2633         bool use_efi;
2634         int b, r;
2635
2636         assert(message);
2637         assert(m);
2638
2639         r = sd_bus_message_read(message, "b", &b);
2640         if (r < 0)
2641                 return r;
2642
2643         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2644         if (r == -ENXIO) {
2645                 /* EFI case: let's see what the firmware supports */
2646
2647                 r = efi_reboot_to_firmware_supported();
2648                 if (r == -EOPNOTSUPP)
2649                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2650                 if (r < 0)
2651                         return r;
2652
2653                 use_efi = true;
2654
2655         } else if (r <= 0) {
2656                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to off */
2657
2658                 if (r < 0)
2659                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2660
2661                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2662         } else
2663                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to on */
2664                 use_efi = false;
2665
2666         r = bus_verify_polkit_async(message,
2667                                     CAP_SYS_ADMIN,
2668                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2669                                     NULL,
2670                                     false,
2671                                     UID_INVALID,
2672                                     &m->polkit_registry,
2673                                     error);
2674         if (r < 0)
2675                 return r;
2676         if (r == 0)
2677                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2678
2679         if (use_efi) {
2680                 r = efi_set_reboot_to_firmware(b);
2681                 if (r < 0)
2682                         return r;
2683         } else {
2684                 if (b) {
2685                         r = touch("/run/systemd/reboot-to-firmware-setup");
2686                         if (r < 0)
2687                                 return r;
2688                 } else {
2689                         if (unlink("/run/systemd/reboot-to-firmware-setup") < 0 && errno != ENOENT)
2690                                 return -errno;
2691                 }
2692         }
2693
2694         return sd_bus_reply_method_return(message, NULL);
2695 }
2696
2697 static int method_can_reboot_to_firmware_setup(
2698                 sd_bus_message *message,
2699                 void *userdata,
2700                 sd_bus_error *error) {
2701
2702         _unused_ Manager *m = userdata;
2703         int r;
2704
2705         assert(message);
2706         assert(m);
2707
2708         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2709         if (r == -ENXIO) {
2710                 /* EFI case: let's see what the firmware supports */
2711
2712                 r = efi_reboot_to_firmware_supported();
2713                 if (r < 0) {
2714                         if (r != -EOPNOTSUPP)
2715                                 log_warning_errno(r, "Failed to determine whether reboot to firmware is supported: %m");
2716
2717                         return sd_bus_reply_method_return(message, "s", "na");
2718                 }
2719
2720         } else if (r <= 0) {
2721                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP */
2722
2723                 if (r < 0)
2724                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2725
2726                 return sd_bus_reply_method_return(message, "s", "na");
2727         }
2728
2729         return return_test_polkit(
2730                         message,
2731                         CAP_SYS_ADMIN,
2732                         "org.freedesktop.login1.set-reboot-to-firmware-setup",
2733                         NULL,
2734                         UID_INVALID,
2735                         error);
2736 }
2737
2738 static int property_get_reboot_to_boot_loader_menu(
2739                 sd_bus *bus,
2740                 const char *path,
2741                 const char *interface,
2742                 const char *property,
2743                 sd_bus_message *reply,
2744                 void *userdata,
2745                 sd_bus_error *error) {
2746
2747         uint64_t x = UINT64_MAX;
2748         int r;
2749
2750         assert(bus);
2751         assert(reply);
2752         assert(userdata);
2753
2754         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2755         if (r == -ENXIO) {
2756                 /* EFI case: returns the current value of LoaderConfigTimeoutOneShot. Three cases are distuingished:
2757                  *
2758                  *     1. Variable not set, boot into boot loader menu is not enabled (we return UINT64_MAX to the user)
2759                  *     2. Variable set to "0", boot into boot loader menu is enabled with no timeout (we return 0 to the user)
2760                  *     3. Variable set to numeric value formatted in ASCII, boot into boot loader menu with the specified timeout in seconds
2761                  */
2762
2763                 r = efi_loader_get_config_timeout_one_shot(&x);
2764                 if (r < 0) {
2765                         if (r != -ENOENT)
2766                                 log_warning_errno(r, "Failed to read LoaderConfigTimeoutOneShot variable, ignoring: %m");
2767                 }
2768
2769         } else if (r < 0)
2770                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2771         else if (r > 0) {
2772                 _cleanup_free_ char *v = NULL;
2773
2774                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-menu. */
2775
2776                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-menu", &v);
2777                 if (r < 0) {
2778                         if (r != -ENOENT)
2779                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-menu: %m");
2780                 } else {
2781                         r = safe_atou64(v, &x);
2782                         if (r < 0)
2783                                 log_warning_errno(r, "Failed to parse /run/systemd/reboot-to-boot-loader-menu: %m");
2784                 }
2785         }
2786
2787         return sd_bus_message_append(reply, "t", x);
2788 }
2789
2790 static int method_set_reboot_to_boot_loader_menu(
2791                 sd_bus_message *message,
2792                 void *userdata,
2793                 sd_bus_error *error) {
2794
2795         Manager *m = userdata;
2796         bool use_efi;
2797         uint64_t x;
2798         int r;
2799
2800         assert(message);
2801         assert(m);
2802
2803         r = sd_bus_message_read(message, "t", &x);
2804         if (r < 0)
2805                 return r;
2806
2807         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2808         if (r == -ENXIO) {
2809                 uint64_t features;
2810
2811                 /* EFI case: let's see if booting into boot loader menu is supported. */
2812
2813                 r = efi_loader_get_features(&features);
2814                 if (r < 0)
2815                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
2816                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
2817                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
2818
2819                 use_efi = true;
2820
2821         } else if (r <= 0) {
2822                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to off */
2823
2824                 if (r < 0)
2825                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2826
2827                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
2828         } else
2829                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to on */
2830                 use_efi = false;
2831
2832         r = bus_verify_polkit_async(message,
2833                                     CAP_SYS_ADMIN,
2834                                     "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
2835                                     NULL,
2836                                     false,
2837                                     UID_INVALID,
2838                                     &m->polkit_registry,
2839                                     error);
2840         if (r < 0)
2841                 return r;
2842         if (r == 0)
2843                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2844
2845         if (use_efi) {
2846                 if (x == UINT64_MAX)
2847                         r = efi_set_variable(EFI_VENDOR_LOADER, "LoaderConfigTimeoutOneShot", NULL, 0);
2848                 else {
2849                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
2850                         xsprintf(buf, "%" PRIu64, DIV_ROUND_UP(x, USEC_PER_SEC)); /* second granularity */
2851
2852                         r = efi_set_variable_string(EFI_VENDOR_LOADER, "LoaderConfigTimeoutOneShot", buf);
2853                 }
2854                 if (r < 0)
2855                         return r;
2856         } else {
2857                 if (x == UINT64_MAX) {
2858                         if (unlink("/run/systemd/reboot-to-boot-loader-menu") < 0 && errno != ENOENT)
2859                                 return -errno;
2860                 } else {
2861                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
2862
2863                         xsprintf(buf, "%" PRIu64, x); /* µs granularity */
2864
2865                         r = write_string_file_atomic_label("/run/systemd/reboot-to-boot-loader-menu", buf);
2866                         if (r < 0)
2867                                 return r;
2868                 }
2869         }
2870
2871         return sd_bus_reply_method_return(message, NULL);
2872 }
2873
2874 static int method_can_reboot_to_boot_loader_menu(
2875                 sd_bus_message *message,
2876                 void *userdata,
2877                 sd_bus_error *error) {
2878
2879         _unused_ Manager *m = userdata;
2880         int r;
2881
2882         assert(message);
2883         assert(m);
2884
2885         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2886         if (r == -ENXIO) {
2887                 uint64_t features = 0;
2888
2889                 /* EFI case, let's see if booting into boot loader menu is supported. */
2890
2891                 r = efi_loader_get_features(&features);
2892                 if (r < 0)
2893                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
2894                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
2895                         return sd_bus_reply_method_return(message, "s", "na");
2896
2897         } else if (r <= 0) {
2898                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU */
2899
2900                 if (r < 0)
2901                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2902
2903                 return sd_bus_reply_method_return(message, "s", "na");
2904         }
2905
2906         return return_test_polkit(
2907                         message,
2908                         CAP_SYS_ADMIN,
2909                         "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
2910                         NULL,
2911                         UID_INVALID,
2912                         error);
2913 }
2914
2915 static int property_get_reboot_to_boot_loader_entry(
2916                 sd_bus *bus,
2917                 const char *path,
2918                 const char *interface,
2919                 const char *property,
2920                 sd_bus_message *reply,
2921                 void *userdata,
2922                 sd_bus_error *error) {
2923
2924         _cleanup_free_ char *v = NULL;
2925         Manager *m = userdata;
2926         const char *x = NULL;
2927         int r;
2928
2929         assert(bus);
2930         assert(reply);
2931         assert(m);
2932
2933         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
2934         if (r == -ENXIO) {
2935                 /* EFI case: let's read the LoaderEntryOneShot variable */
2936
2937                 r = efi_loader_update_entry_one_shot_cache(&m->efi_loader_entry_one_shot, &m->efi_loader_entry_one_shot_stat);
2938                 if (r < 0) {
2939                         if (r != -ENOENT)
2940                                 log_warning_errno(r, "Failed to read LoaderEntryOneShot variable, ignoring: %m");
2941                 } else
2942                         x = m->efi_loader_entry_one_shot;
2943
2944         } else if (r < 0)
2945                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
2946         else if (r > 0) {
2947
2948                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-entry. */
2949
2950                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-entry", &v);
2951                 if (r < 0) {
2952                         if (r != -ENOENT)
2953                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-entry, ignoring: %m");
2954                 } else if (!efi_loader_entry_name_valid(v))
2955                         log_warning("/run/systemd/reboot-to-boot-loader-entry is not valid, ignoring.");
2956                 else
2957                         x = v;
2958         }
2959
2960         return sd_bus_message_append(reply, "s", x);
2961 }
2962
2963 static int boot_loader_entry_exists(Manager *m, const char *id) {
2964         _cleanup_(boot_config_free) BootConfig config = {};
2965         int r;
2966
2967         assert(m);
2968         assert(id);
2969
2970         r = boot_entries_load_config_auto(NULL, NULL, &config);
2971         if (r < 0 && r != -ENOKEY) /* don't complain if no GPT is found, hence skip ENOKEY */
2972                 return r;
2973
2974         r = manager_read_efi_boot_loader_entries(m);
2975         if (r >= 0)
2976                 (void) boot_entries_augment_from_loader(&config, m->efi_boot_loader_entries, true);
2977
2978         return boot_config_has_entry(&config, id);
2979 }
2980
2981 static int method_set_reboot_to_boot_loader_entry(
2982                 sd_bus_message *message,
2983                 void *userdata,
2984                 sd_bus_error *error) {
2985
2986         Manager *m = userdata;
2987         bool use_efi;
2988         const char *v;
2989         int r;
2990
2991         assert(message);
2992         assert(m);
2993
2994         r = sd_bus_message_read(message, "s", &v);
2995         if (r < 0)
2996                 return r;
2997
2998         if (isempty(v))
2999                 v = NULL;
3000         else if (efi_loader_entry_name_valid(v)) {
3001                 r = boot_loader_entry_exists(m, v);
3002                 if (r < 0)
3003                         return r;
3004                 if (r == 0)
3005                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader entry '%s' is not known.", v);
3006         } else
3007                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Boot loader entry name '%s' is not valid, refusing.", v);
3008
3009         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3010         if (r == -ENXIO) {
3011                 uint64_t features;
3012
3013                 /* EFI case: let's see if booting into boot loader entry is supported. */
3014
3015                 r = efi_loader_get_features(&features);
3016                 if (r < 0)
3017                         log_warning_errno(r, "Failed to determine whether reboot into boot loader entry is supported: %m");
3018                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3019                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
3020
3021                 use_efi = true;
3022
3023         } else if (r <= 0) {
3024                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to off */
3025
3026                 if (r < 0)
3027                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3028
3029                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
3030         } else
3031                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to on */
3032                 use_efi = false;
3033
3034         r = bus_verify_polkit_async(message,
3035                                     CAP_SYS_ADMIN,
3036                                     "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3037                                     NULL,
3038                                     false,
3039                                     UID_INVALID,
3040                                     &m->polkit_registry,
3041                                     error);
3042         if (r < 0)
3043                 return r;
3044         if (r == 0)
3045                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3046
3047         if (use_efi) {
3048                 if (isempty(v))
3049                         /* Delete item */
3050                         r = efi_set_variable(EFI_VENDOR_LOADER, "LoaderEntryOneShot", NULL, 0);
3051                 else
3052                         r = efi_set_variable_string(EFI_VENDOR_LOADER, "LoaderEntryOneShot", v);
3053                 if (r < 0)
3054                         return r;
3055         } else {
3056                 if (isempty(v)) {
3057                         if (unlink("/run/systemd/reboot-to-boot-loader-entry") < 0 && errno != ENOENT)
3058                                 return -errno;
3059                 } else {
3060                         r = write_string_file_atomic_label("/run/systemd/reboot-boot-to-loader-entry", v);
3061                         if (r < 0)
3062                                 return r;
3063                 }
3064         }
3065
3066         return sd_bus_reply_method_return(message, NULL);
3067 }
3068
3069 static int method_can_reboot_to_boot_loader_entry(
3070                 sd_bus_message *message,
3071                 void *userdata,
3072                 sd_bus_error *error) {
3073
3074         _unused_ Manager *m = userdata;
3075         int r;
3076
3077         assert(message);
3078         assert(m);
3079
3080         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3081         if (r == -ENXIO) {
3082                 uint64_t features = 0;
3083
3084                 /* EFI case, let's see if booting into boot loader entry is supported. */
3085
3086                 r = efi_loader_get_features(&features);
3087                 if (r < 0)
3088                         log_warning_errno(r, "Failed to determine whether reboot to boot loader entry is supported: %m");
3089                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3090                         return sd_bus_reply_method_return(message, "s", "na");
3091
3092         } else if (r <= 0) {
3093                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY */
3094
3095                 if (r < 0)
3096                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3097
3098                 return sd_bus_reply_method_return(message, "s", "na");
3099         }
3100
3101         return return_test_polkit(
3102                         message,
3103                         CAP_SYS_ADMIN,
3104                         "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3105                         NULL,
3106                         UID_INVALID,
3107                         error);
3108 }
3109
3110 static int property_get_boot_loader_entries(
3111                 sd_bus *bus,
3112                 const char *path,
3113                 const char *interface,
3114                 const char *property,
3115                 sd_bus_message *reply,
3116                 void *userdata,
3117                 sd_bus_error *error) {
3118
3119         _cleanup_(boot_config_free) BootConfig config = {};
3120         Manager *m = userdata;
3121         size_t i;
3122         int r;
3123
3124         assert(bus);
3125         assert(reply);
3126         assert(m);
3127
3128         r = boot_entries_load_config_auto(NULL, NULL, &config);
3129         if (r < 0 && r != -ENOKEY) /* don't complain if there's no GPT found */
3130                 return r;
3131
3132         r = manager_read_efi_boot_loader_entries(m);
3133         if (r >= 0)
3134                 (void) boot_entries_augment_from_loader(&config, m->efi_boot_loader_entries, true);
3135
3136         r = sd_bus_message_open_container(reply, 'a', "s");
3137         if (r < 0)
3138                 return r;
3139
3140         for (i = 0; i < config.n_entries; i++) {
3141                 BootEntry *e = config.entries + i;
3142
3143                 r = sd_bus_message_append(reply, "s", e->id);
3144                 if (r < 0)
3145                         return r;
3146         }
3147
3148         return sd_bus_message_close_container(reply);
3149 }
3150
3151 static int method_set_wall_message(
3152                 sd_bus_message *message,
3153                 void *userdata,
3154                 sd_bus_error *error) {
3155
3156         int r;
3157         Manager *m = userdata;
3158         char *wall_message;
3159         unsigned enable_wall_messages;
3160
3161         assert(message);
3162         assert(m);
3163
3164         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
3165         if (r < 0)
3166                 return r;
3167
3168         /* Short-circuit the operation if the desired state is already in place, to
3169          * avoid an unnecessary polkit permission check. */
3170         if (streq_ptr(m->wall_message, empty_to_null(wall_message)) &&
3171             m->enable_wall_messages == enable_wall_messages)
3172                 goto done;
3173
3174         r = bus_verify_polkit_async(message,
3175                                     CAP_SYS_ADMIN,
3176                                     "org.freedesktop.login1.set-wall-message",
3177                                     NULL,
3178                                     false,
3179                                     UID_INVALID,
3180                                     &m->polkit_registry,
3181                                     error);
3182         if (r < 0)
3183                 return r;
3184         if (r == 0)
3185                 return 1; /* Will call us back */
3186
3187         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
3188         if (r < 0)
3189                 return log_oom();
3190
3191         m->enable_wall_messages = enable_wall_messages;
3192
3193  done:
3194         return sd_bus_reply_method_return(message, NULL);
3195 }
3196
3197 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3198         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3199         const char *who, *why, *what, *mode;
3200         _cleanup_free_ char *id = NULL;
3201         _cleanup_close_ int fifo_fd = -1;
3202         Manager *m = userdata;
3203         Inhibitor *i = NULL;
3204         InhibitMode mm;
3205         InhibitWhat w;
3206         pid_t pid;
3207         uid_t uid;
3208         int r;
3209
3210         assert(message);
3211         assert(m);
3212
3213         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
3214         if (r < 0)
3215                 return r;
3216
3217         w = inhibit_what_from_string(what);
3218         if (w <= 0)
3219                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3220                                          "Invalid what specification %s", what);
3221
3222         mm = inhibit_mode_from_string(mode);
3223         if (mm < 0)
3224                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3225                                          "Invalid mode specification %s", mode);
3226
3227         /* Delay is only supported for shutdown/sleep */
3228         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
3229                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3230                                          "Delay inhibitors only supported for shutdown and sleep");
3231
3232         /* Don't allow taking delay locks while we are already
3233          * executing the operation. We shouldn't create the impression
3234          * that the lock was successful if the machine is about to go
3235          * down/suspend any moment. */
3236         if (m->action_what & w)
3237                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
3238                                          "The operation inhibition has been requested for is already running");
3239
3240         r = bus_verify_polkit_async(
3241                         message,
3242                         CAP_SYS_BOOT,
3243                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
3244                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
3245                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
3246                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
3247                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
3248                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
3249                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
3250                         NULL,
3251                         false,
3252                         UID_INVALID,
3253                         &m->polkit_registry,
3254                         error);
3255         if (r < 0)
3256                 return r;
3257         if (r == 0)
3258                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3259
3260         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
3261         if (r < 0)
3262                 return r;
3263
3264         r = sd_bus_creds_get_euid(creds, &uid);
3265         if (r < 0)
3266                 return r;
3267
3268         r = sd_bus_creds_get_pid(creds, &pid);
3269         if (r < 0)
3270                 return r;
3271
3272         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
3273                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
3274                                          "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.",
3275                                          m->inhibitors_max);
3276
3277         do {
3278                 id = mfree(id);
3279
3280                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
3281                         return -ENOMEM;
3282
3283         } while (hashmap_get(m->inhibitors, id));
3284
3285         r = manager_add_inhibitor(m, id, &i);
3286         if (r < 0)
3287                 return r;
3288
3289         i->what = w;
3290         i->mode = mm;
3291         i->pid = pid;
3292         i->uid = uid;
3293         i->why = strdup(why);
3294         i->who = strdup(who);
3295
3296         if (!i->why || !i->who) {
3297                 r = -ENOMEM;
3298                 goto fail;
3299         }
3300
3301         fifo_fd = inhibitor_create_fifo(i);
3302         if (fifo_fd < 0) {
3303                 r = fifo_fd;
3304                 goto fail;
3305         }
3306
3307         r = inhibitor_start(i);
3308         if (r < 0)
3309                 goto fail;
3310
3311         return sd_bus_reply_method_return(message, "h", fifo_fd);
3312
3313 fail:
3314         if (i)
3315                 inhibitor_free(i);
3316
3317         return r;
3318 }
3319
3320 static const sd_bus_vtable manager_vtable[] = {
3321         SD_BUS_VTABLE_START(0),
3322
3323         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
3324         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
3325
3326         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
3327         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
3328         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
3329         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
3330         SD_BUS_PROPERTY("RebootParameter", "s", property_get_reboot_parameter, 0, 0),
3331         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, 0),
3332         SD_BUS_PROPERTY("RebootToBootLoaderMenu", "t", property_get_reboot_to_boot_loader_menu, 0, 0),
3333         SD_BUS_PROPERTY("RebootToBootLoaderEntry", "s", property_get_reboot_to_boot_loader_entry, 0, 0),
3334         SD_BUS_PROPERTY("BootLoaderEntries", "as", property_get_boot_loader_entries, 0, SD_BUS_VTABLE_PROPERTY_CONST),
3335         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3336         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3337         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3338         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3339         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3340         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
3341         SD_BUS_PROPERTY("UserStopDelayUSec", "t", NULL, offsetof(Manager, user_stop_delay), SD_BUS_VTABLE_PROPERTY_CONST),
3342         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
3343         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
3344         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
3345         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
3346         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
3347         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
3348         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3349         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
3350         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3351         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
3352         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
3353         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
3354         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
3355         SD_BUS_PROPERTY("LidClosed", "b", property_get_lid_closed, 0, 0),
3356         SD_BUS_PROPERTY("OnExternalPower", "b", property_get_on_external_power, 0, 0),
3357         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
3358         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
3359         SD_BUS_PROPERTY("RuntimeDirectoryInodesMax", "t", NULL, offsetof(Manager, runtime_dir_inodes), SD_BUS_VTABLE_PROPERTY_CONST),
3360         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
3361         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
3362         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
3363         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
3364         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
3365
3366         SD_BUS_METHOD_WITH_NAMES("GetSession",
3367                                  "s",
3368                                  SD_BUS_PARAM(session_id),
3369                                  "o",
3370                                  SD_BUS_PARAM(object_path),
3371                                  method_get_session,
3372                                  SD_BUS_VTABLE_UNPRIVILEGED),
3373         SD_BUS_METHOD_WITH_NAMES("GetSessionByPID",
3374                                  "u",
3375                                  SD_BUS_PARAM(pid),
3376                                  "o",
3377                                  SD_BUS_PARAM(object_path),
3378                                  method_get_session_by_pid,
3379                                  SD_BUS_VTABLE_UNPRIVILEGED),
3380         SD_BUS_METHOD_WITH_NAMES("GetUser",
3381                                  "u",
3382                                  SD_BUS_PARAM(uid),
3383                                  "o",
3384                                  SD_BUS_PARAM(object_path),
3385                                  method_get_user,
3386                                  SD_BUS_VTABLE_UNPRIVILEGED),
3387         SD_BUS_METHOD_WITH_NAMES("GetUserByPID",
3388                                  "u",
3389                                  SD_BUS_PARAM(pid),
3390                                  "o",
3391                                  SD_BUS_PARAM(object_path),
3392                                  method_get_user_by_pid,
3393                                  SD_BUS_VTABLE_UNPRIVILEGED),
3394         SD_BUS_METHOD_WITH_NAMES("GetSeat",
3395                                  "s",
3396                                  SD_BUS_PARAM(seat_id),
3397                                  "o",
3398                                  SD_BUS_PARAM(object_path),
3399                                  method_get_seat,
3400                                  SD_BUS_VTABLE_UNPRIVILEGED),
3401         SD_BUS_METHOD_WITH_NAMES("ListSessions",
3402                                  NULL,,
3403                                  "a(susso)",
3404                                  SD_BUS_PARAM(sessions),
3405                                  method_list_sessions,
3406                                  SD_BUS_VTABLE_UNPRIVILEGED),
3407         SD_BUS_METHOD_WITH_NAMES("ListUsers",
3408                                  NULL,,
3409                                  "a(uso)",
3410                                  SD_BUS_PARAM(users),
3411                                  method_list_users,
3412                                  SD_BUS_VTABLE_UNPRIVILEGED),
3413         SD_BUS_METHOD_WITH_NAMES("ListSeats",
3414                                  NULL,,
3415                                  "a(so)",
3416                                  SD_BUS_PARAM(seats),
3417                                  method_list_seats,
3418                                  SD_BUS_VTABLE_UNPRIVILEGED),
3419         SD_BUS_METHOD_WITH_NAMES("ListInhibitors",
3420                                  NULL,,
3421                                  "a(ssssuu)",
3422                                  SD_BUS_PARAM(inhibitors),
3423                                  method_list_inhibitors,
3424                                  SD_BUS_VTABLE_UNPRIVILEGED),
3425         SD_BUS_METHOD_WITH_NAMES("CreateSession",
3426                                  "uusssssussbssa(sv)",
3427                                  SD_BUS_PARAM(uid)
3428                                  SD_BUS_PARAM(pid)
3429                                  SD_BUS_PARAM(service)
3430                                  SD_BUS_PARAM(type)
3431                                  SD_BUS_PARAM(class)
3432                                  SD_BUS_PARAM(desktop)
3433                                  SD_BUS_PARAM(seat_id)
3434                                  SD_BUS_PARAM(vtnr)
3435                                  SD_BUS_PARAM(tty)
3436                                  SD_BUS_PARAM(display)
3437                                  SD_BUS_PARAM(remote)
3438                                  SD_BUS_PARAM(remote_user)
3439                                  SD_BUS_PARAM(remote_host)
3440                                  SD_BUS_PARAM(properties),
3441                                  "soshusub",
3442                                  SD_BUS_PARAM(session_id)
3443                                  SD_BUS_PARAM(object_path)
3444                                  SD_BUS_PARAM(runtime_path)
3445                                  SD_BUS_PARAM(fifo_fd)
3446                                  SD_BUS_PARAM(uid)
3447                                  SD_BUS_PARAM(seat_id)
3448                                  SD_BUS_PARAM(vtnr)
3449                                  SD_BUS_PARAM(existing),
3450                                  method_create_session,
3451                                  0),
3452         SD_BUS_METHOD_WITH_NAMES("ReleaseSession",
3453                                  "s",
3454                                  SD_BUS_PARAM(session_id),
3455                                  NULL,,
3456                                  method_release_session,
3457                                  0),
3458         SD_BUS_METHOD_WITH_NAMES("ActivateSession",
3459                                  "s",
3460                                  SD_BUS_PARAM(session_id),
3461                                  NULL,,
3462                                  method_activate_session,
3463                                  SD_BUS_VTABLE_UNPRIVILEGED),
3464         SD_BUS_METHOD_WITH_NAMES("ActivateSessionOnSeat",
3465                                  "ss",
3466                                  SD_BUS_PARAM(session_id)
3467                                  SD_BUS_PARAM(seat_id),
3468                                  NULL,,
3469                                  method_activate_session_on_seat,
3470                                  SD_BUS_VTABLE_UNPRIVILEGED),
3471         SD_BUS_METHOD_WITH_NAMES("LockSession",
3472                                  "s",
3473                                  SD_BUS_PARAM(session_id),
3474                                  NULL,,
3475                                  method_lock_session,
3476                                  SD_BUS_VTABLE_UNPRIVILEGED),
3477         SD_BUS_METHOD_WITH_NAMES("UnlockSession",
3478                                  "s",
3479                                  SD_BUS_PARAM(session_id),
3480                                  NULL,,
3481                                  method_lock_session,
3482                                  SD_BUS_VTABLE_UNPRIVILEGED),
3483         SD_BUS_METHOD("LockSessions",
3484                       NULL,
3485                       NULL,
3486                       method_lock_sessions,
3487                       SD_BUS_VTABLE_UNPRIVILEGED),
3488         SD_BUS_METHOD("UnlockSessions",
3489                       NULL,
3490                       NULL,
3491                       method_lock_sessions,
3492                       SD_BUS_VTABLE_UNPRIVILEGED),
3493         SD_BUS_METHOD_WITH_NAMES("KillSession",
3494                                  "ssi",
3495                                  SD_BUS_PARAM(session_id)
3496                                  SD_BUS_PARAM(who)
3497                                  SD_BUS_PARAM(signal_number),
3498                                  NULL,,
3499                                  method_kill_session,
3500                                  SD_BUS_VTABLE_UNPRIVILEGED),
3501         SD_BUS_METHOD_WITH_NAMES("KillUser",
3502                                  "ui",
3503                                  SD_BUS_PARAM(uid)
3504                                  SD_BUS_PARAM(signal_number),
3505                                  NULL,,
3506                                  method_kill_user,
3507                                  SD_BUS_VTABLE_UNPRIVILEGED),
3508         SD_BUS_METHOD_WITH_NAMES("TerminateSession",
3509                                  "s",
3510                                  SD_BUS_PARAM(session_id),
3511                                  NULL,,
3512                                  method_terminate_session,
3513                                  SD_BUS_VTABLE_UNPRIVILEGED),
3514         SD_BUS_METHOD_WITH_NAMES("TerminateUser",
3515                                  "u",
3516                                  SD_BUS_PARAM(uid),
3517                                  NULL,,
3518                                  method_terminate_user,
3519                                  SD_BUS_VTABLE_UNPRIVILEGED),
3520         SD_BUS_METHOD_WITH_NAMES("TerminateSeat",
3521                                  "s",
3522                                  SD_BUS_PARAM(seat_id),
3523                                  NULL,,
3524                                  method_terminate_seat,
3525                                  SD_BUS_VTABLE_UNPRIVILEGED),
3526         SD_BUS_METHOD_WITH_NAMES("SetUserLinger",
3527                                  "ubb",
3528                                  SD_BUS_PARAM(uid)
3529                                  SD_BUS_PARAM(enable)
3530                                  SD_BUS_PARAM(interactive),
3531                                  NULL,,
3532                                  method_set_user_linger,
3533                                  SD_BUS_VTABLE_UNPRIVILEGED),
3534         SD_BUS_METHOD_WITH_NAMES("AttachDevice",
3535                                  "ssb",
3536                                  SD_BUS_PARAM(seat_id)
3537                                  SD_BUS_PARAM(sysfs_path)
3538                                  SD_BUS_PARAM(interactive),
3539                                  NULL,,
3540                                  method_attach_device,
3541                                  SD_BUS_VTABLE_UNPRIVILEGED),
3542         SD_BUS_METHOD_WITH_NAMES("FlushDevices",
3543                                  "b",
3544                                  SD_BUS_PARAM(interactive),
3545                                  NULL,,
3546                                  method_flush_devices,
3547                                  SD_BUS_VTABLE_UNPRIVILEGED),
3548         SD_BUS_METHOD_WITH_NAMES("PowerOff",
3549                                  "b",
3550                                  SD_BUS_PARAM(interactive),
3551                                  NULL,,
3552                                  method_poweroff,
3553                                  SD_BUS_VTABLE_UNPRIVILEGED),
3554         SD_BUS_METHOD_WITH_NAMES("Reboot",
3555                                  "b",
3556                                  SD_BUS_PARAM(interactive),
3557                                  NULL,,
3558                                  method_reboot,
3559                                  SD_BUS_VTABLE_UNPRIVILEGED),
3560         SD_BUS_METHOD_WITH_NAMES("Halt",
3561                                  "b",
3562                                  SD_BUS_PARAM(interactive),
3563                                  NULL,,
3564                                  method_halt,
3565                                  SD_BUS_VTABLE_UNPRIVILEGED),
3566         SD_BUS_METHOD_WITH_NAMES("Suspend",
3567                                  "b",
3568                                  SD_BUS_PARAM(interactive),
3569                                  NULL,,
3570                                  method_suspend,
3571                                  SD_BUS_VTABLE_UNPRIVILEGED),
3572         SD_BUS_METHOD_WITH_NAMES("Hibernate",
3573                                  "b",
3574                                  SD_BUS_PARAM(interactive),
3575                                  NULL,,
3576                                  method_hibernate,
3577                                  SD_BUS_VTABLE_UNPRIVILEGED),
3578         SD_BUS_METHOD_WITH_NAMES("HybridSleep",
3579                                  "b",
3580                                  SD_BUS_PARAM(interactive),
3581                                  NULL,,
3582                                  method_hybrid_sleep,
3583                                  SD_BUS_VTABLE_UNPRIVILEGED),
3584         SD_BUS_METHOD_WITH_NAMES("SuspendThenHibernate",
3585                                  "b",
3586                                  SD_BUS_PARAM(interactive),
3587                                  NULL,,
3588                                  method_suspend_then_hibernate,
3589                                  SD_BUS_VTABLE_UNPRIVILEGED),
3590         SD_BUS_METHOD_WITH_NAMES("CanPowerOff",
3591                                  NULL,,
3592                                  "s",
3593                                  SD_BUS_PARAM(result),
3594                                  method_can_poweroff,
3595                                  SD_BUS_VTABLE_UNPRIVILEGED),
3596         SD_BUS_METHOD_WITH_NAMES("CanReboot",
3597                                  NULL,,
3598                                  "s",
3599                                  SD_BUS_PARAM(result),
3600                                  method_can_reboot,
3601                                  SD_BUS_VTABLE_UNPRIVILEGED),
3602         SD_BUS_METHOD_WITH_NAMES("CanHalt",
3603                                  NULL,,
3604                                  "s",
3605                                  SD_BUS_PARAM(result),
3606                                  method_can_halt,
3607                                  SD_BUS_VTABLE_UNPRIVILEGED),
3608         SD_BUS_METHOD_WITH_NAMES("CanSuspend",
3609                                  NULL,,
3610                                  "s",
3611                                  SD_BUS_PARAM(result),
3612                                  method_can_suspend,
3613                                  SD_BUS_VTABLE_UNPRIVILEGED),
3614         SD_BUS_METHOD_WITH_NAMES("CanHibernate",
3615                                  NULL,,
3616                                  "s",
3617                                  SD_BUS_PARAM(result),
3618                                  method_can_hibernate,
3619                                  SD_BUS_VTABLE_UNPRIVILEGED),
3620         SD_BUS_METHOD_WITH_NAMES("CanHybridSleep",
3621                                  NULL,,
3622                                  "s",
3623                                  SD_BUS_PARAM(result),
3624                                  method_can_hybrid_sleep,
3625                                  SD_BUS_VTABLE_UNPRIVILEGED),
3626         SD_BUS_METHOD_WITH_NAMES("CanSuspendThenHibernate",
3627                                  NULL,,
3628                                  "s",
3629                                  SD_BUS_PARAM(result),
3630                                  method_can_suspend_then_hibernate,
3631                                  SD_BUS_VTABLE_UNPRIVILEGED),
3632         SD_BUS_METHOD_WITH_NAMES("ScheduleShutdown",
3633                                  "st",
3634                                  SD_BUS_PARAM(type)
3635                                  SD_BUS_PARAM(usec),
3636                                  NULL,,
3637                                  method_schedule_shutdown,
3638                                  SD_BUS_VTABLE_UNPRIVILEGED),
3639         SD_BUS_METHOD_WITH_NAMES("CancelScheduledShutdown",
3640                                  NULL,,
3641                                  "b",
3642                                  SD_BUS_PARAM(cancelled),
3643                                  method_cancel_scheduled_shutdown,
3644                                  SD_BUS_VTABLE_UNPRIVILEGED),
3645         SD_BUS_METHOD_WITH_NAMES("Inhibit",
3646                                  "ssss",
3647                                  SD_BUS_PARAM(what)
3648                                  SD_BUS_PARAM(who)
3649                                  SD_BUS_PARAM(why)
3650                                  SD_BUS_PARAM(mode),
3651                                  "h",
3652                                  SD_BUS_PARAM(pipe_fd),
3653                                  method_inhibit,
3654                                  SD_BUS_VTABLE_UNPRIVILEGED),
3655         SD_BUS_METHOD_WITH_NAMES("CanRebootParameter",
3656                                  NULL,,
3657                                  "s",
3658                                  SD_BUS_PARAM(result),
3659                                  method_can_reboot_parameter,
3660                                  SD_BUS_VTABLE_UNPRIVILEGED),
3661         SD_BUS_METHOD_WITH_NAMES("SetRebootParameter",
3662                                  "s",
3663                                  SD_BUS_PARAM(parameter),
3664                                  NULL,,
3665                                  method_set_reboot_parameter,
3666                                  SD_BUS_VTABLE_UNPRIVILEGED),
3667         SD_BUS_METHOD_WITH_NAMES("CanRebootToFirmwareSetup",
3668                                  NULL,,
3669                                  "s",
3670                                  SD_BUS_PARAM(result),
3671                                  method_can_reboot_to_firmware_setup,
3672                                  SD_BUS_VTABLE_UNPRIVILEGED),
3673         SD_BUS_METHOD_WITH_NAMES("SetRebootToFirmwareSetup",
3674                                  "b",
3675                                  SD_BUS_PARAM(enable),
3676                                  NULL,,
3677                                  method_set_reboot_to_firmware_setup,
3678                                  SD_BUS_VTABLE_UNPRIVILEGED),
3679         SD_BUS_METHOD_WITH_NAMES("CanRebootToBootLoaderMenu",
3680                                  NULL,,
3681                                  "s",
3682                                  SD_BUS_PARAM(result),
3683                                  method_can_reboot_to_boot_loader_menu,
3684                                  SD_BUS_VTABLE_UNPRIVILEGED),
3685         SD_BUS_METHOD_WITH_NAMES("SetRebootToBootLoaderMenu",
3686                                  "t",
3687                                  SD_BUS_PARAM(timeout),
3688                                  NULL,,
3689                                  method_set_reboot_to_boot_loader_menu,
3690                                  SD_BUS_VTABLE_UNPRIVILEGED),
3691         SD_BUS_METHOD_WITH_NAMES("CanRebootToBootLoaderEntry",
3692                                  NULL,,
3693                                  "s",
3694                                  SD_BUS_PARAM(result),
3695                                  method_can_reboot_to_boot_loader_entry,
3696                                  SD_BUS_VTABLE_UNPRIVILEGED),
3697         SD_BUS_METHOD_WITH_NAMES("SetRebootToBootLoaderEntry",
3698                                  "s",
3699                                  SD_BUS_PARAM(boot_loader_entry),
3700                                  NULL,,
3701                                  method_set_reboot_to_boot_loader_entry,
3702                                  SD_BUS_VTABLE_UNPRIVILEGED),
3703         SD_BUS_METHOD_WITH_NAMES("SetWallMessage",
3704                                  "sb",
3705                                  SD_BUS_PARAM(wall_message)
3706                                  SD_BUS_PARAM(enable),
3707                                  NULL,,
3708                                  method_set_wall_message,
3709                                  SD_BUS_VTABLE_UNPRIVILEGED),
3710
3711         SD_BUS_SIGNAL_WITH_NAMES("SessionNew",
3712                                  "so",
3713                                  SD_BUS_PARAM(session_id)
3714                                  SD_BUS_PARAM(object_path),
3715                                  0),
3716         SD_BUS_SIGNAL_WITH_NAMES("SessionRemoved",
3717                                  "so",
3718                                  SD_BUS_PARAM(session_id)
3719                                  SD_BUS_PARAM(object_path),
3720                                  0),
3721         SD_BUS_SIGNAL_WITH_NAMES("UserNew",
3722                                  "uo",
3723                                  SD_BUS_PARAM(uid)
3724                                  SD_BUS_PARAM(object_path),
3725                                  0),
3726         SD_BUS_SIGNAL_WITH_NAMES("UserRemoved",
3727                                  "uo",
3728                                  SD_BUS_PARAM(uid)
3729                                  SD_BUS_PARAM(object_path),
3730                                  0),
3731         SD_BUS_SIGNAL_WITH_NAMES("SeatNew",
3732                                  "so",
3733                                  SD_BUS_PARAM(seat_id)
3734                                  SD_BUS_PARAM(object_path),
3735                                  0),
3736         SD_BUS_SIGNAL_WITH_NAMES("SeatRemoved",
3737                                  "so",
3738                                  SD_BUS_PARAM(seat_id)
3739                                  SD_BUS_PARAM(object_path),
3740                                  0),
3741         SD_BUS_SIGNAL_WITH_NAMES("PrepareForShutdown",
3742                                  "b",
3743                                  SD_BUS_PARAM(start),
3744                                  0),
3745         SD_BUS_SIGNAL_WITH_NAMES("PrepareForSleep",
3746                                  "b",
3747                                  SD_BUS_PARAM(start),
3748                                  0),
3749
3750         SD_BUS_VTABLE_END
3751 };
3752
3753 const BusObjectImplementation manager_object = {
3754         "/org/freedesktop/login1",
3755         "org.freedesktop.login1.Manager",
3756         .vtables = BUS_VTABLES(manager_vtable),
3757         .children = BUS_IMPLEMENTATIONS(&seat_object,
3758                                         &session_object,
3759                                         &user_object),
3760 };
3761
3762 static int session_jobs_reply(Session *s, uint32_t jid, const char *unit, const char *result) {
3763         assert(s);
3764         assert(unit);
3765
3766         if (!s->started)
3767                 return 0;
3768
3769         if (result && !streq(result, "done")) {
3770                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
3771
3772                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED,
3773                                   "Job %u for unit '%s' failed with '%s'", jid, unit, result);
3774                 return session_send_create_reply(s, &e);
3775         }
3776
3777         return session_send_create_reply(s, NULL);
3778 }
3779
3780 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3781         const char *path, *result, *unit;
3782         Manager *m = userdata;
3783         Session *session;
3784         uint32_t id;
3785         User *user;
3786         int r;
3787
3788         assert(message);
3789         assert(m);
3790
3791         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
3792         if (r < 0) {
3793                 bus_log_parse_error(r);
3794                 return 0;
3795         }
3796
3797         if (m->action_job && streq(m->action_job, path)) {
3798                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
3799
3800                 /* Tell people that they now may take a lock again */
3801                 (void) send_prepare_for(m, m->action_what, false);
3802
3803                 m->action_job = mfree(m->action_job);
3804                 m->action_unit = NULL;
3805                 m->action_what = 0;
3806                 return 0;
3807         }
3808
3809         session = hashmap_get(m->session_units, unit);
3810         if (session) {
3811                 if (streq_ptr(path, session->scope_job)) {
3812                         session->scope_job = mfree(session->scope_job);
3813                         (void) session_jobs_reply(session, id, unit, result);
3814
3815                         session_save(session);
3816                         user_save(session->user);
3817                 }
3818
3819                 session_add_to_gc_queue(session);
3820         }
3821
3822         user = hashmap_get(m->user_units, unit);
3823         if (user) {
3824                 if (streq_ptr(path, user->service_job)) {
3825                         user->service_job = mfree(user->service_job);
3826
3827                         LIST_FOREACH(sessions_by_user, session, user->sessions)
3828                                 (void) session_jobs_reply(session, id, unit, NULL /* don't propagate user service failures to the client */);
3829
3830                         user_save(user);
3831                 }
3832
3833                 user_add_to_gc_queue(user);
3834         }
3835
3836         return 0;
3837 }
3838
3839 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3840         const char *path, *unit;
3841         Manager *m = userdata;
3842         Session *session;
3843         User *user;
3844         int r;
3845
3846         assert(message);
3847         assert(m);
3848
3849         r = sd_bus_message_read(message, "so", &unit, &path);
3850         if (r < 0) {
3851                 bus_log_parse_error(r);
3852                 return 0;
3853         }
3854
3855         session = hashmap_get(m->session_units, unit);
3856         if (session)
3857                 session_add_to_gc_queue(session);
3858
3859         user = hashmap_get(m->user_units, unit);
3860         if (user)
3861                 user_add_to_gc_queue(user);
3862
3863         return 0;
3864 }
3865
3866 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3867         _cleanup_free_ char *unit = NULL;
3868         Manager *m = userdata;
3869         const char *path;
3870         Session *session;
3871         User *user;
3872         int r;
3873
3874         assert(message);
3875         assert(m);
3876
3877         path = sd_bus_message_get_path(message);
3878         if (!path)
3879                 return 0;
3880
3881         r = unit_name_from_dbus_path(path, &unit);
3882         if (r == -EINVAL) /* not a unit */
3883                 return 0;
3884         if (r < 0) {
3885                 log_oom();
3886                 return 0;
3887         }
3888
3889         session = hashmap_get(m->session_units, unit);
3890         if (session)
3891                 session_add_to_gc_queue(session);
3892
3893         user = hashmap_get(m->user_units, unit);
3894         if (user)
3895                 user_add_to_gc_queue(user);
3896
3897         return 0;
3898 }
3899
3900 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3901         Manager *m = userdata;
3902         Session *session;
3903         Iterator i;
3904         int b, r;
3905
3906         assert(message);
3907         assert(m);
3908
3909         r = sd_bus_message_read(message, "b", &b);
3910         if (r < 0) {
3911                 bus_log_parse_error(r);
3912                 return 0;
3913         }
3914
3915         if (b)
3916                 return 0;
3917
3918         /* systemd finished reloading, let's recheck all our sessions */
3919         log_debug("System manager has been reloaded, rechecking sessions...");
3920
3921         HASHMAP_FOREACH(session, m->sessions, i)
3922                 session_add_to_gc_queue(session);
3923
3924         return 0;
3925 }
3926
3927 int manager_send_changed(Manager *manager, const char *property, ...) {
3928         char **l;
3929
3930         assert(manager);
3931
3932         l = strv_from_stdarg_alloca(property);
3933
3934         return sd_bus_emit_properties_changed_strv(
3935                         manager->bus,
3936                         "/org/freedesktop/login1",
3937                         "org.freedesktop.login1.Manager",
3938                         l);
3939 }
3940
3941 static int strdup_job(sd_bus_message *reply, char **job) {
3942         const char *j;
3943         char *copy;
3944         int r;
3945
3946         r = sd_bus_message_read(reply, "o", &j);
3947         if (r < 0)
3948                 return r;
3949
3950         copy = strdup(j);
3951         if (!copy)
3952                 return -ENOMEM;
3953
3954         *job = copy;
3955         return 1;
3956 }
3957
3958 int manager_start_scope(
3959                 Manager *manager,
3960                 const char *scope,
3961                 pid_t pid,
3962                 const char *slice,
3963                 const char *description,
3964                 char **wants,
3965                 char **after,
3966                 const char *requires_mounts_for,
3967                 sd_bus_message *more_properties,
3968                 sd_bus_error *error,
3969                 char **job) {
3970
3971         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3972         char **i;
3973         int r;
3974
3975         assert(manager);
3976         assert(scope);
3977         assert(pid > 1);
3978         assert(job);
3979
3980         r = bus_message_new_method_call(manager->bus, &m, bus_systemd_mgr, "StartTransientUnit");
3981         if (r < 0)
3982                 return r;
3983
3984         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3985         if (r < 0)
3986                 return r;
3987
3988         r = sd_bus_message_open_container(m, 'a', "(sv)");
3989         if (r < 0)
3990                 return r;
3991
3992         if (!isempty(slice)) {
3993                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3994                 if (r < 0)
3995                         return r;
3996         }
3997
3998         if (!isempty(description)) {
3999                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
4000                 if (r < 0)
4001                         return r;
4002         }
4003
4004         STRV_FOREACH(i, wants) {
4005                 r = sd_bus_message_append(m, "(sv)", "Wants", "as", 1, *i);
4006                 if (r < 0)
4007                         return r;
4008         }
4009
4010         STRV_FOREACH(i, after) {
4011                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, *i);
4012                 if (r < 0)
4013                         return r;
4014         }
4015
4016         if (!empty_or_root(requires_mounts_for)) {
4017                 r = sd_bus_message_append(m, "(sv)", "RequiresMountsFor", "as", 1, requires_mounts_for);
4018                 if (r < 0)
4019                         return r;
4020         }
4021
4022         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
4023          * SIGTERM */
4024         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
4025         if (r < 0)
4026                 return r;
4027
4028         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
4029         if (r < 0)
4030                 return r;
4031
4032         /* disable TasksMax= for the session scope, rely on the slice setting for it */
4033         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
4034         if (r < 0)
4035                 return bus_log_create_error(r);
4036
4037         if (more_properties) {
4038                 /* If TasksMax also appears here, it will overwrite the default value set above */
4039                 r = sd_bus_message_copy(m, more_properties, true);
4040                 if (r < 0)
4041                         return r;
4042         }
4043
4044         r = sd_bus_message_close_container(m);
4045         if (r < 0)
4046                 return r;
4047
4048         r = sd_bus_message_append(m, "a(sa(sv))", 0);
4049         if (r < 0)
4050                 return r;
4051
4052         r = sd_bus_call(manager->bus, m, 0, error, &reply);
4053         if (r < 0)
4054                 return r;
4055
4056         return strdup_job(reply, job);
4057 }
4058
4059 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
4060         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4061         int r;
4062
4063         assert(manager);
4064         assert(unit);
4065         assert(job);
4066
4067         r = bus_call_method(
4068                         manager->bus,
4069                         bus_systemd_mgr,
4070                         "StartUnit",
4071                         error,
4072                         &reply,
4073                         "ss", unit, "replace");
4074         if (r < 0)
4075                 return r;
4076
4077         return strdup_job(reply, job);
4078 }
4079
4080 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
4081         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4082         int r;
4083
4084         assert(manager);
4085         assert(unit);
4086         assert(job);
4087
4088         r = bus_call_method(
4089                         manager->bus,
4090                         bus_systemd_mgr,
4091                         "StopUnit",
4092                         error,
4093                         &reply,
4094                         "ss", unit, "fail");
4095         if (r < 0) {
4096                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
4097                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
4098
4099                         *job = NULL;
4100                         sd_bus_error_free(error);
4101                         return 0;
4102                 }
4103
4104                 return r;
4105         }
4106
4107         return strdup_job(reply, job);
4108 }
4109
4110 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *ret_error) {
4111         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4112         _cleanup_free_ char *path = NULL;
4113         int r;
4114
4115         assert(manager);
4116         assert(scope);
4117
4118         path = unit_dbus_path_from_name(scope);
4119         if (!path)
4120                 return -ENOMEM;
4121
4122         r = sd_bus_call_method(
4123                         manager->bus,
4124                         "org.freedesktop.systemd1",
4125                         path,
4126                         "org.freedesktop.systemd1.Scope",
4127                         "Abandon",
4128                         &error,
4129                         NULL,
4130                         NULL);
4131         if (r < 0) {
4132                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
4133                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED) ||
4134                     sd_bus_error_has_name(&error, BUS_ERROR_SCOPE_NOT_RUNNING))
4135                         return 0;
4136
4137                 sd_bus_error_move(ret_error, &error);
4138                 return r;
4139         }
4140
4141         return 1;
4142 }
4143
4144 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
4145         assert(manager);
4146         assert(unit);
4147
4148         return bus_call_method(
4149                         manager->bus,
4150                         bus_systemd_mgr,
4151                         "KillUnit",
4152                         error,
4153                         NULL,
4154                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
4155 }
4156
4157 int manager_unit_is_active(Manager *manager, const char *unit, sd_bus_error *ret_error) {
4158         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4159         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4160         _cleanup_free_ char *path = NULL;
4161         const char *state;
4162         int r;
4163
4164         assert(manager);
4165         assert(unit);
4166
4167         path = unit_dbus_path_from_name(unit);
4168         if (!path)
4169                 return -ENOMEM;
4170
4171         r = sd_bus_get_property(
4172                         manager->bus,
4173                         "org.freedesktop.systemd1",
4174                         path,
4175                         "org.freedesktop.systemd1.Unit",
4176                         "ActiveState",
4177                         &error,
4178                         &reply,
4179                         "s");
4180         if (r < 0) {
4181                 /* systemd might have dropped off momentarily, let's
4182                  * not make this an error */
4183                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
4184                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
4185                         return true;
4186
4187                 /* If the unit is already unloaded then it's not
4188                  * active */
4189                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
4190                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
4191                         return false;
4192
4193                 sd_bus_error_move(ret_error, &error);
4194                 return r;
4195         }
4196
4197         r = sd_bus_message_read(reply, "s", &state);
4198         if (r < 0)
4199                 return r;
4200
4201         return !STR_IN_SET(state, "inactive", "failed");
4202 }
4203
4204 int manager_job_is_active(Manager *manager, const char *path, sd_bus_error *ret_error) {
4205         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
4206         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4207         int r;
4208
4209         assert(manager);
4210         assert(path);
4211
4212         r = sd_bus_get_property(
4213                         manager->bus,
4214                         "org.freedesktop.systemd1",
4215                         path,
4216                         "org.freedesktop.systemd1.Job",
4217                         "State",
4218                         &error,
4219                         &reply,
4220                         "s");
4221         if (r < 0) {
4222                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
4223                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
4224                         return true;
4225
4226                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
4227                         return false;
4228
4229                 sd_bus_error_move(ret_error, &error);
4230                 return r;
4231         }
4232
4233         /* We don't actually care about the state really. The fact
4234          * that we could read the job state is enough for us */
4235
4236         return true;
4237 }