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