src/login/logind-dbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2011 Lennart Poettering
   6 ***/
   7
   8 #include <errno.h>
   9 #include <pwd.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12
  13 #include "sd-messages.h"
  14
  15 #include "alloc-util.h"
  16 #include "audit-util.h"
  17 #include "bus-common-errors.h"
  18 #include "bus-error.h"
  19 #include "bus-unit-util.h"
  20 #include "bus-util.h"
  21 #include "dirent-util.h"
  22 #include "efivars.h"
  23 #include "escape.h"
  24 #include "fd-util.h"
  25 #include "fileio-label.h"
  26 #include "format-util.h"
  27 #include "fs-util.h"
  28 #include "logind.h"
  29 #include "mkdir.h"
  30 #include "path-util.h"
  31 #include "process-util.h"
  32 #include "cgroup-util.h"
  33 #include "selinux-util.h"
  34 #include "sleep-config.h"
  35 #include "special.h"
  36 #include "strv.h"
  37 #include "terminal-util.h"
  38 #include "udev-util.h"
  39 #include "unit-name.h"
  40 #include "user-util.h"
  41 #include "utmp-wtmp.h"
  42
  43 static int get_sender_session(Manager *m, sd_bus_message *message, sd_bus_error *error, Session **ret) {
  44
  45         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  46         const char *name;
  47         Session *session;
  48         int r;
  49
  50         /* Get client login session.  This is not what you are looking for these days,
  51          * as apps may instead belong to a user service unit.  This includes terminal
  52          * emulators and hence command-line apps. */
  53         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  54         if (r < 0)
  55                 return r;
  56
  57         r = sd_bus_creds_get_session(creds, &name);
  58         if (r == -ENXIO)
  59                 goto err_no_session;
  60         if (r < 0)
  61                 return r;
  62
  63         session = hashmap_get(m->sessions, name);
  64         if (!session)
  65                 goto err_no_session;
  66
  67         *ret = session;
  68         return 0;
  69
  70 err_no_session:
  71         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
  72                                  "Caller does not belong to any known session");
  73 }
  74
  75 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  76         Session *session;
  77
  78         assert(m);
  79         assert(message);
  80         assert(ret);
  81
  82         if (isempty(name))
  83                 return get_sender_session(m, message, error, ret);
  84
  85         session = hashmap_get(m->sessions, name);
  86         if (!session)
  87                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  88
  89         *ret = session;
  90         return 0;
  91 }
  92
  93 static int get_sender_user(Manager *m, sd_bus_message *message, sd_bus_error *error, User **ret) {
  94
  95         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  96         uid_t uid;
  97         User *user;
  98         int r;
  99
 100         /* Note that we get the owner UID of the session, not the actual client UID here! */
 101         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 102         if (r < 0)
 103                 return r;
 104
 105         r = sd_bus_creds_get_owner_uid(creds, &uid);
 106         if (r == -ENXIO)
 107                 goto err_no_user;
 108         if (r < 0)
 109                 return r;
 110
 111         user = hashmap_get(m->users, UID_TO_PTR(uid));
 112         if (!user)
 113                 goto err_no_user;
 114
 115         *ret = user;
 116         return 0;
 117
 118 err_no_user:
 119         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "Caller does not belong to any logged in user or lingering user");
 120 }
 121
 122 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
 123         User *user;
 124
 125         assert(m);
 126         assert(message);
 127         assert(ret);
 128
 129         if (!uid_is_valid(uid))
 130                 return get_sender_user(m, message, error, ret);
 131
 132         user = hashmap_get(m->users, UID_TO_PTR(uid));
 133         if (!user)
 134                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "User ID "UID_FMT" is not logged in or lingering", uid);
 135
 136         *ret = user;
 137         return 0;
 138 }
 139
 140 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 141         Seat *seat;
 142         int r;
 143
 144         assert(m);
 145         assert(message);
 146         assert(ret);
 147
 148         if (isempty(name)) {
 149                 Session *session;
 150
 151                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 152                 if (r < 0)
 153                         return r;
 154
 155                 seat = session->seat;
 156                 if (!seat)
 157                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 158         } else {
 159                 seat = hashmap_get(m->seats, name);
 160                 if (!seat)
 161                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 162         }
 163
 164         *ret = seat;
 165         return 0;
 166 }
 167
 168 static int property_get_idle_hint(
 169                 sd_bus *bus,
 170                 const char *path,
 171                 const char *interface,
 172                 const char *property,
 173                 sd_bus_message *reply,
 174                 void *userdata,
 175                 sd_bus_error *error) {
 176
 177         Manager *m = userdata;
 178
 179         assert(bus);
 180         assert(reply);
 181         assert(m);
 182
 183         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 184 }
 185
 186 static int property_get_idle_since_hint(
 187                 sd_bus *bus,
 188                 const char *path,
 189                 const char *interface,
 190                 const char *property,
 191                 sd_bus_message *reply,
 192                 void *userdata,
 193                 sd_bus_error *error) {
 194
 195         Manager *m = userdata;
 196         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 197
 198         assert(bus);
 199         assert(reply);
 200         assert(m);
 201
 202         manager_get_idle_hint(m, &t);
 203
 204         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 205 }
 206
 207 static int property_get_inhibited(
 208                 sd_bus *bus,
 209                 const char *path,
 210                 const char *interface,
 211                 const char *property,
 212                 sd_bus_message *reply,
 213                 void *userdata,
 214                 sd_bus_error *error) {
 215
 216         Manager *m = userdata;
 217         InhibitWhat w;
 218
 219         assert(bus);
 220         assert(reply);
 221         assert(m);
 222
 223         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 224
 225         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 226 }
 227
 228 static int property_get_preparing(
 229                 sd_bus *bus,
 230                 const char *path,
 231                 const char *interface,
 232                 const char *property,
 233                 sd_bus_message *reply,
 234                 void *userdata,
 235                 sd_bus_error *error) {
 236
 237         Manager *m = userdata;
 238         bool b;
 239
 240         assert(bus);
 241         assert(reply);
 242         assert(m);
 243
 244         if (streq(property, "PreparingForShutdown"))
 245                 b = !!(m->action_what & INHIBIT_SHUTDOWN);
 246         else
 247                 b = !!(m->action_what & INHIBIT_SLEEP);
 248
 249         return sd_bus_message_append(reply, "b", b);
 250 }
 251
 252 static int property_get_scheduled_shutdown(
 253                 sd_bus *bus,
 254                 const char *path,
 255                 const char *interface,
 256                 const char *property,
 257                 sd_bus_message *reply,
 258                 void *userdata,
 259                 sd_bus_error *error) {
 260
 261         Manager *m = userdata;
 262         int r;
 263
 264         assert(bus);
 265         assert(reply);
 266         assert(m);
 267
 268         r = sd_bus_message_open_container(reply, 'r', "st");
 269         if (r < 0)
 270                 return r;
 271
 272         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 273         if (r < 0)
 274                 return r;
 275
 276         return sd_bus_message_close_container(reply);
 277 }
 278
 279 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 280
 281 static int property_get_docked(
 282                 sd_bus *bus,
 283                 const char *path,
 284                 const char *interface,
 285                 const char *property,
 286                 sd_bus_message *reply,
 287                 void *userdata,
 288                 sd_bus_error *error) {
 289
 290         Manager *m = userdata;
 291
 292         assert(bus);
 293         assert(reply);
 294         assert(m);
 295
 296         return sd_bus_message_append(reply, "b", manager_is_docked_or_external_displays(m));
 297 }
 298
 299 static int property_get_current_sessions(
 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
 310         assert(bus);
 311         assert(reply);
 312         assert(m);
 313
 314         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->sessions));
 315 }
 316
 317 static int property_get_current_inhibitors(
 318                 sd_bus *bus,
 319                 const char *path,
 320                 const char *interface,
 321                 const char *property,
 322                 sd_bus_message *reply,
 323                 void *userdata,
 324                 sd_bus_error *error) {
 325
 326         Manager *m = userdata;
 327
 328         assert(bus);
 329         assert(reply);
 330         assert(m);
 331
 332         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->inhibitors));
 333 }
 334
 335 static int property_get_compat_user_tasks_max(
 336                 sd_bus *bus,
 337                 const char *path,
 338                 const char *interface,
 339                 const char *property,
 340                 sd_bus_message *reply,
 341                 void *userdata,
 342                 sd_bus_error *error) {
 343
 344         assert(reply);
 345
 346         return sd_bus_message_append(reply, "t", CGROUP_LIMIT_MAX);
 347 }
 348
 349 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 350         _cleanup_free_ char *p = NULL;
 351         Manager *m = userdata;
 352         const char *name;
 353         Session *session;
 354         int r;
 355
 356         assert(message);
 357         assert(m);
 358
 359         r = sd_bus_message_read(message, "s", &name);
 360         if (r < 0)
 361                 return r;
 362
 363         r = manager_get_session_from_creds(m, message, name, error, &session);
 364         if (r < 0)
 365                 return r;
 366
 367         p = session_bus_path(session);
 368         if (!p)
 369                 return -ENOMEM;
 370
 371         return sd_bus_reply_method_return(message, "o", p);
 372 }
 373
 374 /* Get login session of a process.  This is not what you are looking for these days,
 375  * as apps may instead belong to a user service unit.  This includes terminal
 376  * emulators and hence command-line apps. */
 377 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 378         _cleanup_free_ char *p = NULL;
 379         Session *session = NULL;
 380         Manager *m = userdata;
 381         pid_t pid;
 382         int r;
 383
 384         assert(message);
 385         assert(m);
 386
 387         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 388
 389         r = sd_bus_message_read(message, "u", &pid);
 390         if (r < 0)
 391                 return r;
 392         if (pid < 0)
 393                 return -EINVAL;
 394
 395         if (pid == 0) {
 396                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 397                 if (r < 0)
 398                         return r;
 399         } else {
 400                 r = manager_get_session_by_pid(m, pid, &session);
 401                 if (r < 0)
 402                         return r;
 403
 404                 if (!session)
 405                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 406         }
 407
 408         p = session_bus_path(session);
 409         if (!p)
 410                 return -ENOMEM;
 411
 412         return sd_bus_reply_method_return(message, "o", p);
 413 }
 414
 415 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 416         _cleanup_free_ char *p = NULL;
 417         Manager *m = userdata;
 418         uint32_t uid;
 419         User *user;
 420         int r;
 421
 422         assert(message);
 423         assert(m);
 424
 425         r = sd_bus_message_read(message, "u", &uid);
 426         if (r < 0)
 427                 return r;
 428
 429         r = manager_get_user_from_creds(m, message, uid, error, &user);
 430         if (r < 0)
 431                 return r;
 432
 433         p = user_bus_path(user);
 434         if (!p)
 435                 return -ENOMEM;
 436
 437         return sd_bus_reply_method_return(message, "o", p);
 438 }
 439
 440 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 441         _cleanup_free_ char *p = NULL;
 442         Manager *m = userdata;
 443         User *user = NULL;
 444         pid_t pid;
 445         int r;
 446
 447         assert(message);
 448         assert(m);
 449
 450         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 451
 452         r = sd_bus_message_read(message, "u", &pid);
 453         if (r < 0)
 454                 return r;
 455         if (pid < 0)
 456                 return -EINVAL;
 457
 458         if (pid == 0) {
 459                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 460                 if (r < 0)
 461                         return r;
 462         } else {
 463                 r = manager_get_user_by_pid(m, pid, &user);
 464                 if (r < 0)
 465                         return r;
 466                 if (!user)
 467                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 468                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 469                                                  pid);
 470         }
 471
 472         p = user_bus_path(user);
 473         if (!p)
 474                 return -ENOMEM;
 475
 476         return sd_bus_reply_method_return(message, "o", p);
 477 }
 478
 479 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 480         _cleanup_free_ char *p = NULL;
 481         Manager *m = userdata;
 482         const char *name;
 483         Seat *seat;
 484         int r;
 485
 486         assert(message);
 487         assert(m);
 488
 489         r = sd_bus_message_read(message, "s", &name);
 490         if (r < 0)
 491                 return r;
 492
 493         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 494         if (r < 0)
 495                 return r;
 496
 497         p = seat_bus_path(seat);
 498         if (!p)
 499                 return -ENOMEM;
 500
 501         return sd_bus_reply_method_return(message, "o", p);
 502 }
 503
 504 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 505         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 506         Manager *m = userdata;
 507         Session *session;
 508         Iterator i;
 509         int r;
 510
 511         assert(message);
 512         assert(m);
 513
 514         r = sd_bus_message_new_method_return(message, &reply);
 515         if (r < 0)
 516                 return r;
 517
 518         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 519         if (r < 0)
 520                 return r;
 521
 522         HASHMAP_FOREACH(session, m->sessions, i) {
 523                 _cleanup_free_ char *p = NULL;
 524
 525                 p = session_bus_path(session);
 526                 if (!p)
 527                         return -ENOMEM;
 528
 529                 r = sd_bus_message_append(reply, "(susso)",
 530                                           session->id,
 531                                           (uint32_t) session->user->uid,
 532                                           session->user->name,
 533                                           session->seat ? session->seat->id : "",
 534                                           p);
 535                 if (r < 0)
 536                         return r;
 537         }
 538
 539         r = sd_bus_message_close_container(reply);
 540         if (r < 0)
 541                 return r;
 542
 543         return sd_bus_send(NULL, reply, NULL);
 544 }
 545
 546 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 547         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 548         Manager *m = userdata;
 549         User *user;
 550         Iterator i;
 551         int r;
 552
 553         assert(message);
 554         assert(m);
 555
 556         r = sd_bus_message_new_method_return(message, &reply);
 557         if (r < 0)
 558                 return r;
 559
 560         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 561         if (r < 0)
 562                 return r;
 563
 564         HASHMAP_FOREACH(user, m->users, i) {
 565                 _cleanup_free_ char *p = NULL;
 566
 567                 p = user_bus_path(user);
 568                 if (!p)
 569                         return -ENOMEM;
 570
 571                 r = sd_bus_message_append(reply, "(uso)",
 572                                           (uint32_t) user->uid,
 573                                           user->name,
 574                                           p);
 575                 if (r < 0)
 576                         return r;
 577         }
 578
 579         r = sd_bus_message_close_container(reply);
 580         if (r < 0)
 581                 return r;
 582
 583         return sd_bus_send(NULL, reply, NULL);
 584 }
 585
 586 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 587         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 588         Manager *m = userdata;
 589         Seat *seat;
 590         Iterator i;
 591         int r;
 592
 593         assert(message);
 594         assert(m);
 595
 596         r = sd_bus_message_new_method_return(message, &reply);
 597         if (r < 0)
 598                 return r;
 599
 600         r = sd_bus_message_open_container(reply, 'a', "(so)");
 601         if (r < 0)
 602                 return r;
 603
 604         HASHMAP_FOREACH(seat, m->seats, i) {
 605                 _cleanup_free_ char *p = NULL;
 606
 607                 p = seat_bus_path(seat);
 608                 if (!p)
 609                         return -ENOMEM;
 610
 611                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 612                 if (r < 0)
 613                         return r;
 614         }
 615
 616         r = sd_bus_message_close_container(reply);
 617         if (r < 0)
 618                 return r;
 619
 620         return sd_bus_send(NULL, reply, NULL);
 621 }
 622
 623 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 624         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 625         Manager *m = userdata;
 626         Inhibitor *inhibitor;
 627         Iterator i;
 628         int r;
 629
 630         assert(message);
 631         assert(m);
 632
 633         r = sd_bus_message_new_method_return(message, &reply);
 634         if (r < 0)
 635                 return r;
 636
 637         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 638         if (r < 0)
 639                 return r;
 640
 641         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 642
 643                 r = sd_bus_message_append(reply, "(ssssuu)",
 644                                           strempty(inhibit_what_to_string(inhibitor->what)),
 645                                           strempty(inhibitor->who),
 646                                           strempty(inhibitor->why),
 647                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 648                                           (uint32_t) inhibitor->uid,
 649                                           (uint32_t) inhibitor->pid);
 650                 if (r < 0)
 651                         return r;
 652         }
 653
 654         r = sd_bus_message_close_container(reply);
 655         if (r < 0)
 656                 return r;
 657
 658         return sd_bus_send(NULL, reply, NULL);
 659 }
 660
 661 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 662         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 663         _cleanup_free_ char *id = NULL;
 664         Session *session = NULL;
 665         uint32_t audit_id = 0;
 666         Manager *m = userdata;
 667         User *user = NULL;
 668         Seat *seat = NULL;
 669         pid_t leader;
 670         uid_t uid;
 671         int remote;
 672         uint32_t vtnr = 0;
 673         SessionType t;
 674         SessionClass c;
 675         int r;
 676
 677         assert(message);
 678         assert(m);
 679
 680         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 681         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 682
 683         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 684         if (r < 0)
 685                 return r;
 686
 687         if (!uid_is_valid(uid))
 688                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 689         if (leader < 0 || leader == 1 || leader == getpid_cached())
 690                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 691
 692         if (isempty(type))
 693                 t = _SESSION_TYPE_INVALID;
 694         else {
 695                 t = session_type_from_string(type);
 696                 if (t < 0)
 697                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 698         }
 699
 700         if (isempty(class))
 701                 c = _SESSION_CLASS_INVALID;
 702         else {
 703                 c = session_class_from_string(class);
 704                 if (c < 0)
 705                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 706         }
 707
 708         if (isempty(desktop))
 709                 desktop = NULL;
 710         else {
 711                 if (!string_is_safe(desktop))
 712                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 713         }
 714
 715         if (isempty(cseat))
 716                 seat = NULL;
 717         else {
 718                 seat = hashmap_get(m->seats, cseat);
 719                 if (!seat)
 720                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 721         }
 722
 723         if (tty_is_vc(tty)) {
 724                 int v;
 725
 726                 if (!seat)
 727                         seat = m->seat0;
 728                 else if (seat != m->seat0)
 729                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 730
 731                 v = vtnr_from_tty(tty);
 732                 if (v <= 0)
 733                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 734
 735                 if (vtnr == 0)
 736                         vtnr = (uint32_t) v;
 737                 else if (vtnr != (uint32_t) v)
 738                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 739
 740         } else if (tty_is_console(tty)) {
 741
 742                 if (!seat)
 743                         seat = m->seat0;
 744                 else if (seat != m->seat0)
 745                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 746
 747                 if (vtnr != 0)
 748                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 749         }
 750
 751         if (seat) {
 752                 if (seat_has_vts(seat)) {
 753                         if (vtnr <= 0 || vtnr > 63)
 754                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 755                 } else {
 756                         if (vtnr != 0)
 757                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 758                 }
 759         }
 760
 761         if (t == _SESSION_TYPE_INVALID) {
 762                 if (!isempty(display))
 763                         t = SESSION_X11;
 764                 else if (!isempty(tty))
 765                         t = SESSION_TTY;
 766                 else
 767                         t = SESSION_UNSPECIFIED;
 768         }
 769
 770         if (c == _SESSION_CLASS_INVALID) {
 771                 if (t == SESSION_UNSPECIFIED)
 772                         c = SESSION_BACKGROUND;
 773                 else
 774                         c = SESSION_USER;
 775         }
 776
 777         if (leader == 0) {
 778                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 779
 780                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 781                 if (r < 0)
 782                         return r;
 783
 784                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 785                 if (r < 0)
 786                         return r;
 787         }
 788
 789         /* Check if we are already in a logind session. Or if we are in user@.service which is a special PAM session
 790          * that avoids creating a logind session. */
 791         r = manager_get_user_by_pid(m, leader, NULL);
 792         if (r < 0)
 793                 return r;
 794         if (r > 0)
 795                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session or user slice");
 796
 797         /*
 798          * Old gdm and lightdm start the user-session on the same VT as
 799          * the greeter session. But they destroy the greeter session
 800          * after the user-session and want the user-session to take
 801          * over the VT. We need to support this for
 802          * backwards-compatibility, so make sure we allow new sessions
 803          * on a VT that a greeter is running on. Furthermore, to allow
 804          * re-logins, we have to allow a greeter to take over a used VT for
 805          * the exact same reasons.
 806          */
 807         if (c != SESSION_GREETER &&
 808             vtnr > 0 &&
 809             vtnr < m->seat0->position_count &&
 810             m->seat0->positions[vtnr] &&
 811             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 812                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 813
 814         if (hashmap_size(m->sessions) >= m->sessions_max)
 815                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 816
 817         (void) audit_session_from_pid(leader, &audit_id);
 818         if (audit_session_is_valid(audit_id)) {
 819                 /* Keep our session IDs and the audit session IDs in sync */
 820
 821                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 822                         return -ENOMEM;
 823
 824                 /* Wut? There's already a session by this name and we
 825                  * didn't find it above? Weird, then let's not trust
 826                  * the audit data and let's better register a new
 827                  * ID */
 828                 if (hashmap_get(m->sessions, id)) {
 829                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 830                         audit_id = AUDIT_SESSION_INVALID;
 831                         id = mfree(id);
 832                 }
 833         }
 834
 835         if (!id) {
 836                 do {
 837                         id = mfree(id);
 838
 839                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 840                                 return -ENOMEM;
 841
 842                 } while (hashmap_get(m->sessions, id));
 843         }
 844
 845         r = manager_add_user_by_uid(m, uid, &user);
 846         if (r < 0)
 847                 goto fail;
 848
 849         r = manager_add_session(m, id, &session);
 850         if (r < 0)
 851                 goto fail;
 852
 853         session_set_user(session, user);
 854
 855         session->leader = leader;
 856         session->audit_id = audit_id;
 857         session->type = t;
 858         session->class = c;
 859         session->remote = remote;
 860         session->vtnr = vtnr;
 861
 862         if (!isempty(tty)) {
 863                 session->tty = strdup(tty);
 864                 if (!session->tty) {
 865                         r = -ENOMEM;
 866                         goto fail;
 867                 }
 868         }
 869
 870         if (!isempty(display)) {
 871                 session->display = strdup(display);
 872                 if (!session->display) {
 873                         r = -ENOMEM;
 874                         goto fail;
 875                 }
 876         }
 877
 878         if (!isempty(remote_user)) {
 879                 session->remote_user = strdup(remote_user);
 880                 if (!session->remote_user) {
 881                         r = -ENOMEM;
 882                         goto fail;
 883                 }
 884         }
 885
 886         if (!isempty(remote_host)) {
 887                 session->remote_host = strdup(remote_host);
 888                 if (!session->remote_host) {
 889                         r = -ENOMEM;
 890                         goto fail;
 891                 }
 892         }
 893
 894         if (!isempty(service)) {
 895                 session->service = strdup(service);
 896                 if (!session->service) {
 897                         r = -ENOMEM;
 898                         goto fail;
 899                 }
 900         }
 901
 902         if (!isempty(desktop)) {
 903                 session->desktop = strdup(desktop);
 904                 if (!session->desktop) {
 905                         r = -ENOMEM;
 906                         goto fail;
 907                 }
 908         }
 909
 910         if (seat) {
 911                 r = seat_attach_session(seat, session);
 912                 if (r < 0)
 913                         goto fail;
 914         }
 915
 916         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 917         if (r < 0)
 918                 return r;
 919
 920         r = session_start(session, message);
 921         if (r < 0)
 922                 goto fail;
 923
 924         r = sd_bus_message_exit_container(message);
 925         if (r < 0)
 926                 goto fail;
 927
 928         session->create_message = sd_bus_message_ref(message);
 929
 930         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 931          * session_send_create_reply(). */
 932
 933         return 1;
 934
 935 fail:
 936         if (session)
 937                 session_add_to_gc_queue(session);
 938
 939         if (user)
 940                 user_add_to_gc_queue(user);
 941
 942         return r;
 943 }
 944
 945 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 946         Manager *m = userdata;
 947         Session *session;
 948         const char *name;
 949         int r;
 950
 951         assert(message);
 952         assert(m);
 953
 954         r = sd_bus_message_read(message, "s", &name);
 955         if (r < 0)
 956                 return r;
 957
 958         r = manager_get_session_from_creds(m, message, name, error, &session);
 959         if (r < 0)
 960                 return r;
 961
 962         r = session_release(session);
 963         if (r < 0)
 964                 return r;
 965
 966         return sd_bus_reply_method_return(message, NULL);
 967 }
 968
 969 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 970         Manager *m = userdata;
 971         Session *session;
 972         const char *name;
 973         int r;
 974
 975         assert(message);
 976         assert(m);
 977
 978         r = sd_bus_message_read(message, "s", &name);
 979         if (r < 0)
 980                 return r;
 981
 982         r = manager_get_session_from_creds(m, message, name, error, &session);
 983         if (r < 0)
 984                 return r;
 985
 986         return bus_session_method_activate(message, session, error);
 987 }
 988
 989 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 990         const char *session_name, *seat_name;
 991         Manager *m = userdata;
 992         Session *session;
 993         Seat *seat;
 994         int r;
 995
 996         assert(message);
 997         assert(m);
 998
 999         /* Same as ActivateSession() but refuses to work if
1000          * the seat doesn't match */
1001
1002         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
1003         if (r < 0)
1004                 return r;
1005
1006         r = manager_get_session_from_creds(m, message, session_name, error, &session);
1007         if (r < 0)
1008                 return r;
1009
1010         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
1011         if (r < 0)
1012                 return r;
1013
1014         if (session->seat != seat)
1015                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
1016
1017         r = session_activate(session);
1018         if (r < 0)
1019                 return r;
1020
1021         return sd_bus_reply_method_return(message, NULL);
1022 }
1023
1024 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1025         Manager *m = userdata;
1026         Session *session;
1027         const char *name;
1028         int r;
1029
1030         assert(message);
1031         assert(m);
1032
1033         r = sd_bus_message_read(message, "s", &name);
1034         if (r < 0)
1035                 return r;
1036
1037         r = manager_get_session_from_creds(m, message, name, error, &session);
1038         if (r < 0)
1039                 return r;
1040
1041         return bus_session_method_lock(message, session, error);
1042 }
1043
1044 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1045         Manager *m = userdata;
1046         int r;
1047
1048         assert(message);
1049         assert(m);
1050
1051         r = bus_verify_polkit_async(
1052                         message,
1053                         CAP_SYS_ADMIN,
1054                         "org.freedesktop.login1.lock-sessions",
1055                         NULL,
1056                         false,
1057                         UID_INVALID,
1058                         &m->polkit_registry,
1059                         error);
1060         if (r < 0)
1061                 return r;
1062         if (r == 0)
1063                 return 1; /* Will call us back */
1064
1065         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1066         if (r < 0)
1067                 return r;
1068
1069         return sd_bus_reply_method_return(message, NULL);
1070 }
1071
1072 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1073         const char *name;
1074         Manager *m = userdata;
1075         Session *session;
1076         int r;
1077
1078         assert(message);
1079         assert(m);
1080
1081         r = sd_bus_message_read(message, "s", &name);
1082         if (r < 0)
1083                 return r;
1084
1085         r = manager_get_session_from_creds(m, message, name, error, &session);
1086         if (r < 0)
1087                 return r;
1088
1089         return bus_session_method_kill(message, session, error);
1090 }
1091
1092 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1093         Manager *m = userdata;
1094         uint32_t uid;
1095         User *user;
1096         int r;
1097
1098         assert(message);
1099         assert(m);
1100
1101         r = sd_bus_message_read(message, "u", &uid);
1102         if (r < 0)
1103                 return r;
1104
1105         r = manager_get_user_from_creds(m, message, uid, error, &user);
1106         if (r < 0)
1107                 return r;
1108
1109         return bus_user_method_kill(message, user, error);
1110 }
1111
1112 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1113         Manager *m = userdata;
1114         const char *name;
1115         Session *session;
1116         int r;
1117
1118         assert(message);
1119         assert(m);
1120
1121         r = sd_bus_message_read(message, "s", &name);
1122         if (r < 0)
1123                 return r;
1124
1125         r = manager_get_session_from_creds(m, message, name, error, &session);
1126         if (r < 0)
1127                 return r;
1128
1129         return bus_session_method_terminate(message, session, error);
1130 }
1131
1132 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1133         Manager *m = userdata;
1134         uint32_t uid;
1135         User *user;
1136         int r;
1137
1138         assert(message);
1139         assert(m);
1140
1141         r = sd_bus_message_read(message, "u", &uid);
1142         if (r < 0)
1143                 return r;
1144
1145         r = manager_get_user_from_creds(m, message, uid, error, &user);
1146         if (r < 0)
1147                 return r;
1148
1149         return bus_user_method_terminate(message, user, error);
1150 }
1151
1152 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1153         Manager *m = userdata;
1154         const char *name;
1155         Seat *seat;
1156         int r;
1157
1158         assert(message);
1159         assert(m);
1160
1161         r = sd_bus_message_read(message, "s", &name);
1162         if (r < 0)
1163                 return r;
1164
1165         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1166         if (r < 0)
1167                 return r;
1168
1169         return bus_seat_method_terminate(message, seat, error);
1170 }
1171
1172 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1173         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1174         _cleanup_free_ char *cc = NULL;
1175         Manager *m = userdata;
1176         int r, b, interactive;
1177         struct passwd *pw;
1178         const char *path;
1179         uint32_t uid, auth_uid;
1180
1181         assert(message);
1182         assert(m);
1183
1184         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1185         if (r < 0)
1186                 return r;
1187
1188         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1189                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1190         if (r < 0)
1191                 return r;
1192
1193         if (!uid_is_valid(uid)) {
1194                 /* Note that we get the owner UID of the session or user unit,
1195                  * not the actual client UID here! */
1196                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1197                 if (r < 0)
1198                         return r;
1199         }
1200
1201         /* owner_uid is racy, so for authorization we must use euid */
1202         r = sd_bus_creds_get_euid(creds, &auth_uid);
1203         if (r < 0)
1204                 return r;
1205
1206         errno = 0;
1207         pw = getpwuid(uid);
1208         if (!pw)
1209                 return errno > 0 ? -errno : -ENOENT;
1210
1211         r = bus_verify_polkit_async(
1212                         message,
1213                         CAP_SYS_ADMIN,
1214                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1215                                           "org.freedesktop.login1.set-user-linger",
1216                         NULL,
1217                         interactive,
1218                         UID_INVALID,
1219                         &m->polkit_registry,
1220                         error);
1221         if (r < 0)
1222                 return r;
1223         if (r == 0)
1224                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1225
1226         mkdir_p_label("/var/lib/systemd", 0755);
1227
1228         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1229         if (r < 0)
1230                 return r;
1231
1232         cc = cescape(pw->pw_name);
1233         if (!cc)
1234                 return -ENOMEM;
1235
1236         path = strjoina("/var/lib/systemd/linger/", cc);
1237         if (b) {
1238                 User *u;
1239
1240                 r = touch(path);
1241                 if (r < 0)
1242                         return r;
1243
1244                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1245                         user_start(u);
1246
1247         } else {
1248                 User *u;
1249
1250                 r = unlink(path);
1251                 if (r < 0 && errno != ENOENT)
1252                         return -errno;
1253
1254                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1255                 if (u)
1256                         user_add_to_gc_queue(u);
1257         }
1258
1259         return sd_bus_reply_method_return(message, NULL);
1260 }
1261
1262 static int trigger_device(Manager *m, struct udev_device *d) {
1263         _cleanup_(udev_enumerate_unrefp) struct udev_enumerate *e = NULL;
1264         struct udev_list_entry *first, *item;
1265         int r;
1266
1267         assert(m);
1268
1269         e = udev_enumerate_new(m->udev);
1270         if (!e)
1271                 return -ENOMEM;
1272
1273         if (d) {
1274                 r = udev_enumerate_add_match_parent(e, d);
1275                 if (r < 0)
1276                         return r;
1277         }
1278
1279         r = udev_enumerate_scan_devices(e);
1280         if (r < 0)
1281                 return r;
1282
1283         first = udev_enumerate_get_list_entry(e);
1284         udev_list_entry_foreach(item, first) {
1285                 _cleanup_free_ char *t = NULL;
1286                 const char *p;
1287
1288                 p = udev_list_entry_get_name(item);
1289
1290                 t = strappend(p, "/uevent");
1291                 if (!t)
1292                         return -ENOMEM;
1293
1294                 (void) write_string_file(t, "change", 0);
1295         }
1296
1297         return 0;
1298 }
1299
1300 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1301         _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
1302         _cleanup_free_ char *rule = NULL, *file = NULL;
1303         const char *id_for_seat;
1304         int r;
1305
1306         assert(m);
1307         assert(seat);
1308         assert(sysfs);
1309
1310         d = udev_device_new_from_syspath(m->udev, sysfs);
1311         if (!d)
1312                 return -ENODEV;
1313
1314         if (!udev_device_has_tag(d, "seat"))
1315                 return -ENODEV;
1316
1317         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1318         if (!id_for_seat)
1319                 return -ENODEV;
1320
1321         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1322                 return -ENOMEM;
1323
1324         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1325                 return -ENOMEM;
1326
1327         mkdir_p_label("/etc/udev/rules.d", 0755);
1328         r = write_string_file_atomic_label(file, rule);
1329         if (r < 0)
1330                 return r;
1331
1332         return trigger_device(m, d);
1333 }
1334
1335 static int flush_devices(Manager *m) {
1336         _cleanup_closedir_ DIR *d;
1337
1338         assert(m);
1339
1340         d = opendir("/etc/udev/rules.d");
1341         if (!d) {
1342                 if (errno != ENOENT)
1343                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1344         } else {
1345                 struct dirent *de;
1346
1347                 FOREACH_DIRENT_ALL(de, d, break) {
1348                         if (!dirent_is_file(de))
1349                                 continue;
1350
1351                         if (!startswith(de->d_name, "72-seat-"))
1352                                 continue;
1353
1354                         if (!endswith(de->d_name, ".rules"))
1355                                 continue;
1356
1357                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1358                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1359                 }
1360         }
1361
1362         return trigger_device(m, NULL);
1363 }
1364
1365 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1366         const char *sysfs, *seat;
1367         Manager *m = userdata;
1368         int interactive, r;
1369
1370         assert(message);
1371         assert(m);
1372
1373         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1374         if (r < 0)
1375                 return r;
1376
1377         if (!path_startswith(sysfs, "/sys"))
1378                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1379
1380         if (!seat_name_is_valid(seat))
1381                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1382
1383         r = bus_verify_polkit_async(
1384                         message,
1385                         CAP_SYS_ADMIN,
1386                         "org.freedesktop.login1.attach-device",
1387                         NULL,
1388                         interactive,
1389                         UID_INVALID,
1390                         &m->polkit_registry,
1391                         error);
1392         if (r < 0)
1393                 return r;
1394         if (r == 0)
1395                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1396
1397         r = attach_device(m, seat, sysfs);
1398         if (r < 0)
1399                 return r;
1400
1401         return sd_bus_reply_method_return(message, NULL);
1402 }
1403
1404 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1405         Manager *m = userdata;
1406         int interactive, r;
1407
1408         assert(message);
1409         assert(m);
1410
1411         r = sd_bus_message_read(message, "b", &interactive);
1412         if (r < 0)
1413                 return r;
1414
1415         r = bus_verify_polkit_async(
1416                         message,
1417                         CAP_SYS_ADMIN,
1418                         "org.freedesktop.login1.flush-devices",
1419                         NULL,
1420                         interactive,
1421                         UID_INVALID,
1422                         &m->polkit_registry,
1423                         error);
1424         if (r < 0)
1425                 return r;
1426         if (r == 0)
1427                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1428
1429         r = flush_devices(m);
1430         if (r < 0)
1431                 return r;
1432
1433         return sd_bus_reply_method_return(message, NULL);
1434 }
1435
1436 static int have_multiple_sessions(
1437                 Manager *m,
1438                 uid_t uid) {
1439
1440         Session *session;
1441         Iterator i;
1442
1443         assert(m);
1444
1445         /* Check for other users' sessions. Greeter sessions do not
1446          * count, and non-login sessions do not count either. */
1447         HASHMAP_FOREACH(session, m->sessions, i)
1448                 if (session->class == SESSION_USER &&
1449                     session->user->uid != uid)
1450                         return true;
1451
1452         return false;
1453 }
1454
1455 static int bus_manager_log_shutdown(
1456                 Manager *m,
1457                 const char *unit_name) {
1458
1459         const char *p, *q;
1460
1461         assert(m);
1462         assert(unit_name);
1463
1464         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1465                 p = "MESSAGE=System is powering down";
1466                 q = "SHUTDOWN=power-off";
1467         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1468                 p = "MESSAGE=System is rebooting";
1469                 q = "SHUTDOWN=reboot";
1470         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1471                 p = "MESSAGE=System is halting";
1472                 q = "SHUTDOWN=halt";
1473         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1474                 p = "MESSAGE=System is rebooting with kexec";
1475                 q = "SHUTDOWN=kexec";
1476         } else {
1477                 p = "MESSAGE=System is shutting down";
1478                 q = NULL;
1479         }
1480
1481         if (isempty(m->wall_message))
1482                 p = strjoina(p, ".");
1483         else
1484                 p = strjoina(p, " (", m->wall_message, ").");
1485
1486         return log_struct(LOG_NOTICE,
1487                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1488                           p,
1489                           q,
1490                           NULL);
1491 }
1492
1493 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1494         Manager *m = userdata;
1495
1496         assert(e);
1497         assert(m);
1498
1499         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1500         return 0;
1501 }
1502
1503 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1504         int r;
1505
1506         assert(m);
1507
1508         if (until <= now(CLOCK_MONOTONIC))
1509                 return 0;
1510
1511         /* We want to ignore the lid switch for a while after each
1512          * suspend, and after boot-up. Hence let's install a timer for
1513          * this. As long as the event source exists we ignore the lid
1514          * switch. */
1515
1516         if (m->lid_switch_ignore_event_source) {
1517                 usec_t u;
1518
1519                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1520                 if (r < 0)
1521                         return r;
1522
1523                 if (until <= u)
1524                         return 0;
1525
1526                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1527         } else
1528                 r = sd_event_add_time(
1529                                 m->event,
1530                                 &m->lid_switch_ignore_event_source,
1531                                 CLOCK_MONOTONIC,
1532                                 until, 0,
1533                                 lid_switch_ignore_handler, m);
1534
1535         return r;
1536 }
1537
1538 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1539
1540         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1541                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1542                 [INHIBIT_SLEEP] = "PrepareForSleep"
1543         };
1544
1545         int active = _active;
1546
1547         assert(m);
1548         assert(w >= 0);
1549         assert(w < _INHIBIT_WHAT_MAX);
1550         assert(signal_name[w]);
1551
1552         return sd_bus_emit_signal(m->bus,
1553                                   "/org/freedesktop/login1",
1554                                   "org.freedesktop.login1.Manager",
1555                                   signal_name[w],
1556                                   "b",
1557                                   active);
1558 }
1559
1560 static int execute_shutdown_or_sleep(
1561                 Manager *m,
1562                 InhibitWhat w,
1563                 const char *unit_name,
1564                 sd_bus_error *error) {
1565
1566         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1567         char *c = NULL;
1568         const char *p;
1569         int r;
1570
1571         assert(m);
1572         assert(w > 0);
1573         assert(w < _INHIBIT_WHAT_MAX);
1574         assert(unit_name);
1575
1576         if (w == INHIBIT_SHUTDOWN)
1577                 bus_manager_log_shutdown(m, unit_name);
1578
1579         r = sd_bus_call_method(
1580                         m->bus,
1581                         "org.freedesktop.systemd1",
1582                         "/org/freedesktop/systemd1",
1583                         "org.freedesktop.systemd1.Manager",
1584                         "StartUnit",
1585                         error,
1586                         &reply,
1587                         "ss", unit_name, "replace-irreversibly");
1588         if (r < 0)
1589                 goto error;
1590
1591         r = sd_bus_message_read(reply, "o", &p);
1592         if (r < 0)
1593                 goto error;
1594
1595         c = strdup(p);
1596         if (!c) {
1597                 r = -ENOMEM;
1598                 goto error;
1599         }
1600
1601         m->action_unit = unit_name;
1602         free(m->action_job);
1603         m->action_job = c;
1604         m->action_what = w;
1605
1606         /* Make sure the lid switch is ignored for a while */
1607         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1608
1609         return 0;
1610
1611 error:
1612         /* Tell people that they now may take a lock again */
1613         (void) send_prepare_for(m, w, false);
1614
1615         return r;
1616 }
1617
1618 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1619
1620         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1621         Inhibitor *offending = NULL;
1622         int r;
1623
1624         assert(manager);
1625
1626         if (manager->action_what == 0 || manager->action_job)
1627                 return 0;
1628
1629         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1630                 _cleanup_free_ char *comm = NULL, *u = NULL;
1631
1632                 if (!timeout)
1633                         return 0;
1634
1635                 (void) get_process_comm(offending->pid, &comm);
1636                 u = uid_to_name(offending->uid);
1637
1638                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1639                            offending->uid, strna(u),
1640                            offending->pid, strna(comm));
1641         }
1642
1643         /* Actually do the operation */
1644         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1645         if (r < 0) {
1646                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1647                             bus_error_message(&error, r));
1648
1649                 manager->action_unit = NULL;
1650                 manager->action_what = 0;
1651                 return r;
1652         }
1653
1654         return 1;
1655 }
1656
1657 static int manager_inhibit_timeout_handler(
1658                         sd_event_source *s,
1659                         uint64_t usec,
1660                         void *userdata) {
1661
1662         Manager *manager = userdata;
1663         int r;
1664
1665         assert(manager);
1666         assert(manager->inhibit_timeout_source == s);
1667
1668         r = manager_dispatch_delayed(manager, true);
1669         return (r < 0) ? r : 0;
1670 }
1671
1672 static int delay_shutdown_or_sleep(
1673                 Manager *m,
1674                 InhibitWhat w,
1675                 const char *unit_name) {
1676
1677         int r;
1678         usec_t timeout_val;
1679
1680         assert(m);
1681         assert(w >= 0);
1682         assert(w < _INHIBIT_WHAT_MAX);
1683         assert(unit_name);
1684
1685         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1686
1687         if (m->inhibit_timeout_source) {
1688                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1689                 if (r < 0)
1690                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1691
1692                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1693                 if (r < 0)
1694                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1695         } else {
1696                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1697                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1698                 if (r < 0)
1699                         return r;
1700         }
1701
1702         m->action_unit = unit_name;
1703         m->action_what = w;
1704
1705         return 0;
1706 }
1707
1708 int bus_manager_shutdown_or_sleep_now_or_later(
1709                 Manager *m,
1710                 const char *unit_name,
1711                 InhibitWhat w,
1712                 sd_bus_error *error) {
1713
1714         _cleanup_free_ char *load_state = NULL;
1715         bool delayed;
1716         int r;
1717
1718         assert(m);
1719         assert(unit_name);
1720         assert(w > 0);
1721         assert(w <= _INHIBIT_WHAT_MAX);
1722         assert(!m->action_job);
1723
1724         r = unit_load_state(m->bus, unit_name, &load_state);
1725         if (r < 0)
1726                 return r;
1727
1728         if (!streq(load_state, "loaded")) {
1729                 log_notice("Unit %s is %s, refusing operation.", unit_name, load_state);
1730                 return -EACCES;
1731         }
1732
1733         /* Tell everybody to prepare for shutdown/sleep */
1734         (void) send_prepare_for(m, w, true);
1735
1736         delayed =
1737                 m->inhibit_delay_max > 0 &&
1738                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1739
1740         if (delayed)
1741                 /* Shutdown is delayed, keep in mind what we
1742                  * want to do, and start a timeout */
1743                 r = delay_shutdown_or_sleep(m, w, unit_name);
1744         else
1745                 /* Shutdown is not delayed, execute it
1746                  * immediately */
1747                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1748
1749         return r;
1750 }
1751
1752 static int verify_shutdown_creds(
1753                 Manager *m,
1754                 sd_bus_message *message,
1755                 InhibitWhat w,
1756                 bool interactive,
1757                 const char *action,
1758                 const char *action_multiple_sessions,
1759                 const char *action_ignore_inhibit,
1760                 sd_bus_error *error) {
1761
1762         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1763         bool multiple_sessions, blocked;
1764         uid_t uid;
1765         int r;
1766
1767         assert(m);
1768         assert(message);
1769         assert(w >= 0);
1770         assert(w <= _INHIBIT_WHAT_MAX);
1771
1772         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1773         if (r < 0)
1774                 return r;
1775
1776         r = sd_bus_creds_get_euid(creds, &uid);
1777         if (r < 0)
1778                 return r;
1779
1780         r = have_multiple_sessions(m, uid);
1781         if (r < 0)
1782                 return r;
1783
1784         multiple_sessions = r > 0;
1785         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1786
1787         if (multiple_sessions && action_multiple_sessions) {
1788                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1789                 if (r < 0)
1790                         return r;
1791                 if (r == 0)
1792                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1793         }
1794
1795         if (blocked && action_ignore_inhibit) {
1796                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1797                 if (r < 0)
1798                         return r;
1799                 if (r == 0)
1800                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1801         }
1802
1803         if (!multiple_sessions && !blocked && action) {
1804                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1805                 if (r < 0)
1806                         return r;
1807                 if (r == 0)
1808                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1809         }
1810
1811         return 0;
1812 }
1813
1814 static int method_do_shutdown_or_sleep(
1815                 Manager *m,
1816                 sd_bus_message *message,
1817                 const char *unit_name,
1818                 InhibitWhat w,
1819                 const char *action,
1820                 const char *action_multiple_sessions,
1821                 const char *action_ignore_inhibit,
1822                 const char *sleep_verb,
1823                 sd_bus_error *error) {
1824
1825         int interactive, r;
1826
1827         assert(m);
1828         assert(message);
1829         assert(unit_name);
1830         assert(w >= 0);
1831         assert(w <= _INHIBIT_WHAT_MAX);
1832
1833         r = sd_bus_message_read(message, "b", &interactive);
1834         if (r < 0)
1835                 return r;
1836
1837         /* Don't allow multiple jobs being executed at the same time */
1838         if (m->action_what)
1839                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1840
1841         if (sleep_verb) {
1842                 r = can_sleep(sleep_verb);
1843                 if (r == -ENOSPC)
1844                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1845                                                 "Not enough swap space for hibernation");
1846                 if (r == 0)
1847                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1848                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1849                 if (r < 0)
1850                         return r;
1851         }
1852
1853         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1854                                   action_ignore_inhibit, error);
1855         if (r != 0)
1856                 return r;
1857
1858         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1859         if (r < 0)
1860                 return r;
1861
1862         return sd_bus_reply_method_return(message, NULL);
1863 }
1864
1865 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1866         Manager *m = userdata;
1867
1868         return method_do_shutdown_or_sleep(
1869                         m, message,
1870                         SPECIAL_POWEROFF_TARGET,
1871                         INHIBIT_SHUTDOWN,
1872                         "org.freedesktop.login1.power-off",
1873                         "org.freedesktop.login1.power-off-multiple-sessions",
1874                         "org.freedesktop.login1.power-off-ignore-inhibit",
1875                         NULL,
1876                         error);
1877 }
1878
1879 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1880         Manager *m = userdata;
1881
1882         return method_do_shutdown_or_sleep(
1883                         m, message,
1884                         SPECIAL_REBOOT_TARGET,
1885                         INHIBIT_SHUTDOWN,
1886                         "org.freedesktop.login1.reboot",
1887                         "org.freedesktop.login1.reboot-multiple-sessions",
1888                         "org.freedesktop.login1.reboot-ignore-inhibit",
1889                         NULL,
1890                         error);
1891 }
1892
1893 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1894         Manager *m = userdata;
1895
1896         return method_do_shutdown_or_sleep(
1897                         m, message,
1898                         SPECIAL_HALT_TARGET,
1899                         INHIBIT_SHUTDOWN,
1900                         "org.freedesktop.login1.halt",
1901                         "org.freedesktop.login1.halt-multiple-sessions",
1902                         "org.freedesktop.login1.halt-ignore-inhibit",
1903                         NULL,
1904                         error);
1905 }
1906
1907 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1908         Manager *m = userdata;
1909
1910         return method_do_shutdown_or_sleep(
1911                         m, message,
1912                         SPECIAL_SUSPEND_TARGET,
1913                         INHIBIT_SLEEP,
1914                         "org.freedesktop.login1.suspend",
1915                         "org.freedesktop.login1.suspend-multiple-sessions",
1916                         "org.freedesktop.login1.suspend-ignore-inhibit",
1917                         "suspend",
1918                         error);
1919 }
1920
1921 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1922         Manager *m = userdata;
1923
1924         return method_do_shutdown_or_sleep(
1925                         m, message,
1926                         SPECIAL_HIBERNATE_TARGET,
1927                         INHIBIT_SLEEP,
1928                         "org.freedesktop.login1.hibernate",
1929                         "org.freedesktop.login1.hibernate-multiple-sessions",
1930                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1931                         "hibernate",
1932                         error);
1933 }
1934
1935 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1936         Manager *m = userdata;
1937
1938         return method_do_shutdown_or_sleep(
1939                         m, message,
1940                         SPECIAL_HYBRID_SLEEP_TARGET,
1941                         INHIBIT_SLEEP,
1942                         "org.freedesktop.login1.hibernate",
1943                         "org.freedesktop.login1.hibernate-multiple-sessions",
1944                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1945                         "hybrid-sleep",
1946                         error);
1947 }
1948
1949 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1950         Manager *m = userdata;
1951
1952         return method_do_shutdown_or_sleep(
1953                         m, message,
1954                         SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
1955                         INHIBIT_SLEEP,
1956                         "org.freedesktop.login1.hibernate",
1957                         "org.freedesktop.login1.hibernate-multiple-sessions",
1958                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1959                         "hybrid-sleep",
1960                         error);
1961 }
1962
1963 static int nologin_timeout_handler(
1964                         sd_event_source *s,
1965                         uint64_t usec,
1966                         void *userdata) {
1967
1968         Manager *m = userdata;
1969
1970         log_info("Creating /run/nologin, blocking further logins...");
1971
1972         m->unlink_nologin =
1973                 create_shutdown_run_nologin_or_warn() >= 0;
1974
1975         return 0;
1976 }
1977
1978 static int update_schedule_file(Manager *m) {
1979         _cleanup_free_ char *temp_path = NULL;
1980         _cleanup_fclose_ FILE *f = NULL;
1981         int r;
1982
1983         assert(m);
1984
1985         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
1986         if (r < 0)
1987                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1988
1989         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1990         if (r < 0)
1991                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1992
1993         (void) fchmod(fileno(f), 0644);
1994
1995         fprintf(f,
1996                 "USEC="USEC_FMT"\n"
1997                 "WARN_WALL=%i\n"
1998                 "MODE=%s\n",
1999                 m->scheduled_shutdown_timeout,
2000                 m->enable_wall_messages,
2001                 m->scheduled_shutdown_type);
2002
2003         if (!isempty(m->wall_message)) {
2004                 _cleanup_free_ char *t;
2005
2006                 t = cescape(m->wall_message);
2007                 if (!t) {
2008                         r = -ENOMEM;
2009                         goto fail;
2010                 }
2011
2012                 fprintf(f, "WALL_MESSAGE=%s\n", t);
2013         }
2014
2015         r = fflush_and_check(f);
2016         if (r < 0)
2017                 goto fail;
2018
2019         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2020                 r = -errno;
2021                 goto fail;
2022         }
2023
2024         return 0;
2025
2026 fail:
2027         (void) unlink(temp_path);
2028         (void) unlink("/run/systemd/shutdown/scheduled");
2029
2030         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2031 }
2032
2033 static void reset_scheduled_shutdown(Manager *m) {
2034         assert(m);
2035
2036         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2037         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
2038         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
2039
2040         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
2041         m->scheduled_shutdown_timeout = 0;
2042         m->shutdown_dry_run = false;
2043
2044         if (m->unlink_nologin) {
2045                 (void) unlink_or_warn("/run/nologin");
2046                 m->unlink_nologin = false;
2047         }
2048
2049         (void) unlink("/run/systemd/shutdown/scheduled");
2050 }
2051
2052 static int manager_scheduled_shutdown_handler(
2053                         sd_event_source *s,
2054                         uint64_t usec,
2055                         void *userdata) {
2056
2057         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2058         Manager *m = userdata;
2059         const char *target;
2060         int r;
2061
2062         assert(m);
2063
2064         if (isempty(m->scheduled_shutdown_type))
2065                 return 0;
2066
2067         if (streq(m->scheduled_shutdown_type, "poweroff"))
2068                 target = SPECIAL_POWEROFF_TARGET;
2069         else if (streq(m->scheduled_shutdown_type, "reboot"))
2070                 target = SPECIAL_REBOOT_TARGET;
2071         else if (streq(m->scheduled_shutdown_type, "halt"))
2072                 target = SPECIAL_HALT_TARGET;
2073         else
2074                 assert_not_reached("unexpected shutdown type");
2075
2076         /* Don't allow multiple jobs being executed at the same time */
2077         if (m->action_what) {
2078                 r = -EALREADY;
2079                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2080                 goto error;
2081         }
2082
2083         if (m->shutdown_dry_run) {
2084                 /* We do not process delay inhibitors here.  Otherwise, we
2085                  * would have to be considered "in progress" (like the check
2086                  * above) for some seconds after our admin has seen the final
2087                  * wall message. */
2088
2089                 bus_manager_log_shutdown(m, target);
2090                 log_info("Running in dry run, suppressing action.");
2091                 reset_scheduled_shutdown(m);
2092
2093                 return 0;
2094         }
2095
2096         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2097         if (r < 0) {
2098                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2099                 goto error;
2100         }
2101
2102         return 0;
2103
2104 error:
2105         reset_scheduled_shutdown(m);
2106         return r;
2107 }
2108
2109 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2110         Manager *m = userdata;
2111         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2112         const char *action_multiple_sessions = NULL;
2113         const char *action_ignore_inhibit = NULL;
2114         const char *action = NULL;
2115         uint64_t elapse;
2116         char *type;
2117         int r;
2118         bool dry_run = false;
2119
2120         assert(m);
2121         assert(message);
2122
2123         r = sd_bus_message_read(message, "st", &type, &elapse);
2124         if (r < 0)
2125                 return r;
2126
2127         if (startswith(type, "dry-")) {
2128                 type += 4;
2129                 dry_run = true;
2130         }
2131
2132         if (streq(type, "poweroff")) {
2133                 action = "org.freedesktop.login1.power-off";
2134                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2135                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2136         } else if (streq(type, "reboot")) {
2137                 action = "org.freedesktop.login1.reboot";
2138                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2139                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2140         } else if (streq(type, "halt")) {
2141                 action = "org.freedesktop.login1.halt";
2142                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2143                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2144         } else
2145                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2146
2147         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2148                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2149         if (r != 0)
2150                 return r;
2151
2152         if (m->scheduled_shutdown_timeout_source) {
2153                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2154                 if (r < 0)
2155                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2156
2157                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2158                 if (r < 0)
2159                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2160         } else {
2161                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2162                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2163                 if (r < 0)
2164                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2165         }
2166
2167         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2168         if (r < 0) {
2169                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2170                 return log_oom();
2171         }
2172
2173         m->shutdown_dry_run = dry_run;
2174
2175         if (m->nologin_timeout_source) {
2176                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2177                 if (r < 0)
2178                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2179
2180                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2181                 if (r < 0)
2182                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2183         } else {
2184                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2185                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2186                 if (r < 0)
2187                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2188         }
2189
2190         m->scheduled_shutdown_timeout = elapse;
2191
2192         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2193         if (r >= 0) {
2194                 const char *tty = NULL;
2195
2196                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2197                 (void) sd_bus_creds_get_tty(creds, &tty);
2198
2199                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2200                 if (r < 0) {
2201                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2202                         return log_oom();
2203                 }
2204         }
2205
2206         r = manager_setup_wall_message_timer(m);
2207         if (r < 0)
2208                 return r;
2209
2210         r = update_schedule_file(m);
2211         if (r < 0)
2212                 return r;
2213
2214         return sd_bus_reply_method_return(message, NULL);
2215 }
2216
2217 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2218         Manager *m = userdata;
2219         bool cancelled;
2220
2221         assert(m);
2222         assert(message);
2223
2224         cancelled = m->scheduled_shutdown_type != NULL;
2225         reset_scheduled_shutdown(m);
2226
2227         if (cancelled) {
2228                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2229                 const char *tty = NULL;
2230                 uid_t uid = 0;
2231                 int r;
2232
2233                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2234                 if (r >= 0) {
2235                         (void) sd_bus_creds_get_uid(creds, &uid);
2236                         (void) sd_bus_creds_get_tty(creds, &tty);
2237                 }
2238
2239                 utmp_wall("The system shutdown has been cancelled",
2240                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2241         }
2242
2243         return sd_bus_reply_method_return(message, "b", cancelled);
2244 }
2245
2246 static int method_can_shutdown_or_sleep(
2247                 Manager *m,
2248                 sd_bus_message *message,
2249                 InhibitWhat w,
2250                 const char *action,
2251                 const char *action_multiple_sessions,
2252                 const char *action_ignore_inhibit,
2253                 const char *sleep_verb,
2254                 sd_bus_error *error) {
2255
2256         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2257         HandleAction handle;
2258         bool multiple_sessions, challenge, blocked;
2259         const char *result = NULL;
2260         uid_t uid;
2261         int r;
2262
2263         assert(m);
2264         assert(message);
2265         assert(w >= 0);
2266         assert(w <= _INHIBIT_WHAT_MAX);
2267         assert(action);
2268         assert(action_multiple_sessions);
2269         assert(action_ignore_inhibit);
2270
2271         if (sleep_verb) {
2272                 r = can_sleep(sleep_verb);
2273                 if (IN_SET(r,  0, -ENOSPC))
2274                         return sd_bus_reply_method_return(message, "s", "na");
2275                 if (r < 0)
2276                         return r;
2277         }
2278
2279         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2280         if (r < 0)
2281                 return r;
2282
2283         r = sd_bus_creds_get_euid(creds, &uid);
2284         if (r < 0)
2285                 return r;
2286
2287         r = have_multiple_sessions(m, uid);
2288         if (r < 0)
2289                 return r;
2290
2291         multiple_sessions = r > 0;
2292         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2293
2294         handle = handle_action_from_string(sleep_verb);
2295         if (handle >= 0) {
2296                 const char *target;
2297
2298                 target = manager_target_for_action(handle);
2299                 if (target) {
2300                         _cleanup_free_ char *load_state = NULL;
2301
2302                         r = unit_load_state(m->bus, target, &load_state);
2303                         if (r < 0)
2304                                 return r;
2305
2306                         if (!streq(load_state, "loaded")) {
2307                                 result = "no";
2308                                 goto finish;
2309                         }
2310                 }
2311         }
2312
2313         if (multiple_sessions) {
2314                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2315                 if (r < 0)
2316                         return r;
2317
2318                 if (r > 0)
2319                         result = "yes";
2320                 else if (challenge)
2321                         result = "challenge";
2322                 else
2323                         result = "no";
2324         }
2325
2326         if (blocked) {
2327                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2328                 if (r < 0)
2329                         return r;
2330
2331                 if (r > 0 && !result)
2332                         result = "yes";
2333                 else if (challenge && (!result || streq(result, "yes")))
2334                         result = "challenge";
2335                 else
2336                         result = "no";
2337         }
2338
2339         if (!multiple_sessions && !blocked) {
2340                 /* If neither inhibit nor multiple sessions
2341                  * apply then just check the normal policy */
2342
2343                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2344                 if (r < 0)
2345                         return r;
2346
2347                 if (r > 0)
2348                         result = "yes";
2349                 else if (challenge)
2350                         result = "challenge";
2351                 else
2352                         result = "no";
2353         }
2354
2355  finish:
2356         return sd_bus_reply_method_return(message, "s", result);
2357 }
2358
2359 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2360         Manager *m = userdata;
2361
2362         return method_can_shutdown_or_sleep(
2363                         m, message,
2364                         INHIBIT_SHUTDOWN,
2365                         "org.freedesktop.login1.power-off",
2366                         "org.freedesktop.login1.power-off-multiple-sessions",
2367                         "org.freedesktop.login1.power-off-ignore-inhibit",
2368                         NULL,
2369                         error);
2370 }
2371
2372 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2373         Manager *m = userdata;
2374
2375         return method_can_shutdown_or_sleep(
2376                         m, message,
2377                         INHIBIT_SHUTDOWN,
2378                         "org.freedesktop.login1.reboot",
2379                         "org.freedesktop.login1.reboot-multiple-sessions",
2380                         "org.freedesktop.login1.reboot-ignore-inhibit",
2381                         NULL,
2382                         error);
2383 }
2384
2385 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2386         Manager *m = userdata;
2387
2388         return method_can_shutdown_or_sleep(
2389                         m, message,
2390                         INHIBIT_SHUTDOWN,
2391                         "org.freedesktop.login1.halt",
2392                         "org.freedesktop.login1.halt-multiple-sessions",
2393                         "org.freedesktop.login1.halt-ignore-inhibit",
2394                         NULL,
2395                         error);
2396 }
2397
2398 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2399         Manager *m = userdata;
2400
2401         return method_can_shutdown_or_sleep(
2402                         m, message,
2403                         INHIBIT_SLEEP,
2404                         "org.freedesktop.login1.suspend",
2405                         "org.freedesktop.login1.suspend-multiple-sessions",
2406                         "org.freedesktop.login1.suspend-ignore-inhibit",
2407                         "suspend",
2408                         error);
2409 }
2410
2411 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2412         Manager *m = userdata;
2413
2414         return method_can_shutdown_or_sleep(
2415                         m, message,
2416                         INHIBIT_SLEEP,
2417                         "org.freedesktop.login1.hibernate",
2418                         "org.freedesktop.login1.hibernate-multiple-sessions",
2419                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2420                         "hibernate",
2421                         error);
2422 }
2423
2424 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2425         Manager *m = userdata;
2426
2427         return method_can_shutdown_or_sleep(
2428                         m, message,
2429                         INHIBIT_SLEEP,
2430                         "org.freedesktop.login1.hibernate",
2431                         "org.freedesktop.login1.hibernate-multiple-sessions",
2432                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2433                         "hybrid-sleep",
2434                         error);
2435 }
2436
2437 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2438         Manager *m = userdata;
2439
2440         return method_can_shutdown_or_sleep(
2441                         m, message,
2442                         INHIBIT_SLEEP,
2443                         "org.freedesktop.login1.hibernate",
2444                         "org.freedesktop.login1.hibernate-multiple-sessions",
2445                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2446                         "suspend-then-hibernate",
2447                         error);
2448 }
2449
2450 static int property_get_reboot_to_firmware_setup(
2451                 sd_bus *bus,
2452                 const char *path,
2453                 const char *interface,
2454                 const char *property,
2455                 sd_bus_message *reply,
2456                 void *userdata,
2457                 sd_bus_error *error) {
2458         int r;
2459
2460         assert(bus);
2461         assert(reply);
2462         assert(userdata);
2463
2464         r = efi_get_reboot_to_firmware();
2465         if (r < 0 && r != -EOPNOTSUPP)
2466                 log_warning_errno(r, "Failed to determine reboot-to-firmware state: %m");
2467
2468         return sd_bus_message_append(reply, "b", r > 0);
2469 }
2470
2471 static int method_set_reboot_to_firmware_setup(
2472                 sd_bus_message *message,
2473                 void *userdata,
2474                 sd_bus_error *error) {
2475
2476         int b, r;
2477         Manager *m = userdata;
2478
2479         assert(message);
2480         assert(m);
2481
2482         r = sd_bus_message_read(message, "b", &b);
2483         if (r < 0)
2484                 return r;
2485
2486         r = bus_verify_polkit_async(message,
2487                                     CAP_SYS_ADMIN,
2488                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2489                                     NULL,
2490                                     false,
2491                                     UID_INVALID,
2492                                     &m->polkit_registry,
2493                                     error);
2494         if (r < 0)
2495                 return r;
2496         if (r == 0)
2497                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2498
2499         r = efi_set_reboot_to_firmware(b);
2500         if (r < 0)
2501                 return r;
2502
2503         return sd_bus_reply_method_return(message, NULL);
2504 }
2505
2506 static int method_can_reboot_to_firmware_setup(
2507                 sd_bus_message *message,
2508                 void *userdata,
2509                 sd_bus_error *error) {
2510
2511         int r;
2512         bool challenge;
2513         const char *result;
2514         Manager *m = userdata;
2515
2516         assert(message);
2517         assert(m);
2518
2519         r = efi_reboot_to_firmware_supported();
2520         if (r < 0) {
2521                 if (r != -EOPNOTSUPP)
2522                         log_warning_errno(errno, "Failed to determine whether reboot to firmware is supported: %m");
2523
2524                 return sd_bus_reply_method_return(message, "s", "na");
2525         }
2526
2527         r = bus_test_polkit(message,
2528                             CAP_SYS_ADMIN,
2529                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2530                             NULL,
2531                             UID_INVALID,
2532                             &challenge,
2533                             error);
2534         if (r < 0)
2535                 return r;
2536
2537         if (r > 0)
2538                 result = "yes";
2539         else if (challenge)
2540                 result = "challenge";
2541         else
2542                 result = "no";
2543
2544         return sd_bus_reply_method_return(message, "s", result);
2545 }
2546
2547 static int method_set_wall_message(
2548                 sd_bus_message *message,
2549                 void *userdata,
2550                 sd_bus_error *error) {
2551
2552         int r;
2553         Manager *m = userdata;
2554         char *wall_message;
2555         int enable_wall_messages;
2556
2557         assert(message);
2558         assert(m);
2559
2560         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2561         if (r < 0)
2562                 return r;
2563
2564         r = bus_verify_polkit_async(message,
2565                                     CAP_SYS_ADMIN,
2566                                     "org.freedesktop.login1.set-wall-message",
2567                                     NULL,
2568                                     false,
2569                                     UID_INVALID,
2570                                     &m->polkit_registry,
2571                                     error);
2572         if (r < 0)
2573                 return r;
2574         if (r == 0)
2575                 return 1; /* Will call us back */
2576
2577         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2578         if (r < 0)
2579                 return log_oom();
2580
2581         m->enable_wall_messages = enable_wall_messages;
2582
2583         return sd_bus_reply_method_return(message, NULL);
2584 }
2585
2586 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2587         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2588         const char *who, *why, *what, *mode;
2589         _cleanup_free_ char *id = NULL;
2590         _cleanup_close_ int fifo_fd = -1;
2591         Manager *m = userdata;
2592         Inhibitor *i = NULL;
2593         InhibitMode mm;
2594         InhibitWhat w;
2595         pid_t pid;
2596         uid_t uid;
2597         int r;
2598
2599         assert(message);
2600         assert(m);
2601
2602         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2603         if (r < 0)
2604                 return r;
2605
2606         w = inhibit_what_from_string(what);
2607         if (w <= 0)
2608                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2609
2610         mm = inhibit_mode_from_string(mode);
2611         if (mm < 0)
2612                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2613
2614         /* Delay is only supported for shutdown/sleep */
2615         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2616                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2617
2618         /* Don't allow taking delay locks while we are already
2619          * executing the operation. We shouldn't create the impression
2620          * that the lock was successful if the machine is about to go
2621          * down/suspend any moment. */
2622         if (m->action_what & w)
2623                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2624
2625         r = bus_verify_polkit_async(
2626                         message,
2627                         CAP_SYS_BOOT,
2628                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2629                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2630                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2631                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2632                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2633                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2634                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2635                         NULL,
2636                         false,
2637                         UID_INVALID,
2638                         &m->polkit_registry,
2639                         error);
2640         if (r < 0)
2641                 return r;
2642         if (r == 0)
2643                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2644
2645         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2646         if (r < 0)
2647                 return r;
2648
2649         r = sd_bus_creds_get_euid(creds, &uid);
2650         if (r < 0)
2651                 return r;
2652
2653         r = sd_bus_creds_get_pid(creds, &pid);
2654         if (r < 0)
2655                 return r;
2656
2657         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2658                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2659
2660         do {
2661                 id = mfree(id);
2662
2663                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2664                         return -ENOMEM;
2665
2666         } while (hashmap_get(m->inhibitors, id));
2667
2668         r = manager_add_inhibitor(m, id, &i);
2669         if (r < 0)
2670                 return r;
2671
2672         i->what = w;
2673         i->mode = mm;
2674         i->pid = pid;
2675         i->uid = uid;
2676         i->why = strdup(why);
2677         i->who = strdup(who);
2678
2679         if (!i->why || !i->who) {
2680                 r = -ENOMEM;
2681                 goto fail;
2682         }
2683
2684         fifo_fd = inhibitor_create_fifo(i);
2685         if (fifo_fd < 0) {
2686                 r = fifo_fd;
2687                 goto fail;
2688         }
2689
2690         inhibitor_start(i);
2691
2692         return sd_bus_reply_method_return(message, "h", fifo_fd);
2693
2694 fail:
2695         if (i)
2696                 inhibitor_free(i);
2697
2698         return r;
2699 }
2700
2701 const sd_bus_vtable manager_vtable[] = {
2702         SD_BUS_VTABLE_START(0),
2703
2704         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2705         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2706
2707         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2708         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2709         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2710         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2711         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2712         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2713         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2714         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2715         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2716         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2717         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2718         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2719         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2720         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2721         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2722         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
2723         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2724         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2725         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2726         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2727         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2728         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2729         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2730         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2731         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2732         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2733         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2734         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2735         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2736         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2737         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
2738
2739         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2740         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2741         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2742         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2743         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2744         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2745         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2746         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2747         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2748         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2749         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2750         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2751         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2752         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2753         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2754         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2755         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2756         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2757         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2758         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2759         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2760         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2761         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2762         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2763         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2764         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2765         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2766         SD_BUS_METHOD("Halt", "b", NULL, method_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2767         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2768         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2769         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2770         SD_BUS_METHOD("SuspendThenHibernate", "b", NULL, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2771         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2772         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2773         SD_BUS_METHOD("CanHalt", NULL, "s", method_can_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2774         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2775         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2776         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2777         SD_BUS_METHOD("CanSuspendThenHibernate", NULL, "s", method_can_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2778         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2779         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2780         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2781         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2782         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2783         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2784
2785         SD_BUS_SIGNAL("SessionNew", "so", 0),
2786         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2787         SD_BUS_SIGNAL("UserNew", "uo", 0),
2788         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2789         SD_BUS_SIGNAL("SeatNew", "so", 0),
2790         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2791         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2792         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2793
2794         SD_BUS_VTABLE_END
2795 };
2796
2797 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2798         int r = 0;
2799
2800         assert(s);
2801         assert(unit);
2802
2803         if (!s->started)
2804                 return r;
2805
2806         if (streq(result, "done"))
2807                 r = session_send_create_reply(s, NULL);
2808         else {
2809                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2810
2811                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2812                 r = session_send_create_reply(s, &e);
2813         }
2814
2815         return r;
2816 }
2817
2818 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2819         const char *path, *result, *unit;
2820         Manager *m = userdata;
2821         Session *session;
2822         uint32_t id;
2823         User *user;
2824         int r;
2825
2826         assert(message);
2827         assert(m);
2828
2829         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2830         if (r < 0) {
2831                 bus_log_parse_error(r);
2832                 return 0;
2833         }
2834
2835         if (m->action_job && streq(m->action_job, path)) {
2836                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2837
2838                 /* Tell people that they now may take a lock again */
2839                 (void) send_prepare_for(m, m->action_what, false);
2840
2841                 m->action_job = mfree(m->action_job);
2842                 m->action_unit = NULL;
2843                 m->action_what = 0;
2844                 return 0;
2845         }
2846
2847         session = hashmap_get(m->session_units, unit);
2848         if (session && streq_ptr(path, session->scope_job)) {
2849                 session->scope_job = mfree(session->scope_job);
2850                 session_jobs_reply(session, unit, result);
2851
2852                 session_save(session);
2853                 user_save(session->user);
2854                 session_add_to_gc_queue(session);
2855         }
2856
2857         user = hashmap_get(m->user_units, unit);
2858         if (user &&
2859             (streq_ptr(path, user->service_job) ||
2860              streq_ptr(path, user->slice_job))) {
2861
2862                 if (streq_ptr(path, user->service_job))
2863                         user->service_job = mfree(user->service_job);
2864
2865                 if (streq_ptr(path, user->slice_job))
2866                         user->slice_job = mfree(user->slice_job);
2867
2868                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2869                         session_jobs_reply(session, unit, result);
2870
2871                 user_save(user);
2872                 user_add_to_gc_queue(user);
2873         }
2874
2875         return 0;
2876 }
2877
2878 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2879         const char *path, *unit;
2880         Manager *m = userdata;
2881         Session *session;
2882         User *user;
2883         int r;
2884
2885         assert(message);
2886         assert(m);
2887
2888         r = sd_bus_message_read(message, "so", &unit, &path);
2889         if (r < 0) {
2890                 bus_log_parse_error(r);
2891                 return 0;
2892         }
2893
2894         session = hashmap_get(m->session_units, unit);
2895         if (session)
2896                 session_add_to_gc_queue(session);
2897
2898         user = hashmap_get(m->user_units, unit);
2899         if (user)
2900                 user_add_to_gc_queue(user);
2901
2902         return 0;
2903 }
2904
2905 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2906         _cleanup_free_ char *unit = NULL;
2907         Manager *m = userdata;
2908         const char *path;
2909         Session *session;
2910         User *user;
2911         int r;
2912
2913         assert(message);
2914         assert(m);
2915
2916         path = sd_bus_message_get_path(message);
2917         if (!path)
2918                 return 0;
2919
2920         r = unit_name_from_dbus_path(path, &unit);
2921         if (r == -EINVAL) /* not a unit */
2922                 return 0;
2923         if (r < 0) {
2924                 log_oom();
2925                 return 0;
2926         }
2927
2928         session = hashmap_get(m->session_units, unit);
2929         if (session)
2930                 session_add_to_gc_queue(session);
2931
2932         user = hashmap_get(m->user_units, unit);
2933         if (user)
2934                 user_add_to_gc_queue(user);
2935
2936         return 0;
2937 }
2938
2939 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2940         Manager *m = userdata;
2941         Session *session;
2942         Iterator i;
2943         int b, r;
2944
2945         assert(message);
2946         assert(m);
2947
2948         r = sd_bus_message_read(message, "b", &b);
2949         if (r < 0) {
2950                 bus_log_parse_error(r);
2951                 return 0;
2952         }
2953
2954         if (b)
2955                 return 0;
2956
2957         /* systemd finished reloading, let's recheck all our sessions */
2958         log_debug("System manager has been reloaded, rechecking sessions...");
2959
2960         HASHMAP_FOREACH(session, m->sessions, i)
2961                 session_add_to_gc_queue(session);
2962
2963         return 0;
2964 }
2965
2966 int manager_send_changed(Manager *manager, const char *property, ...) {
2967         char **l;
2968
2969         assert(manager);
2970
2971         l = strv_from_stdarg_alloca(property);
2972
2973         return sd_bus_emit_properties_changed_strv(
2974                         manager->bus,
2975                         "/org/freedesktop/login1",
2976                         "org.freedesktop.login1.Manager",
2977                         l);
2978 }
2979
2980 static int strdup_job(sd_bus_message *reply, char **job) {
2981         const char *j;
2982         char *copy;
2983         int r;
2984
2985         r = sd_bus_message_read(reply, "o", &j);
2986         if (r < 0)
2987                 return r;
2988
2989         copy = strdup(j);
2990         if (!copy)
2991                 return -ENOMEM;
2992
2993         *job = copy;
2994         return 1;
2995 }
2996
2997 int manager_start_scope(
2998                 Manager *manager,
2999                 const char *scope,
3000                 pid_t pid,
3001                 const char *slice,
3002                 const char *description,
3003                 const char *after,
3004                 const char *after2,
3005                 sd_bus_message *more_properties,
3006                 sd_bus_error *error,
3007                 char **job) {
3008
3009         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3010         int r;
3011
3012         assert(manager);
3013         assert(scope);
3014         assert(pid > 1);
3015         assert(job);
3016
3017         r = sd_bus_message_new_method_call(
3018                         manager->bus,
3019                         &m,
3020                         "org.freedesktop.systemd1",
3021                         "/org/freedesktop/systemd1",
3022                         "org.freedesktop.systemd1.Manager",
3023                         "StartTransientUnit");
3024         if (r < 0)
3025                 return r;
3026
3027         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3028         if (r < 0)
3029                 return r;
3030
3031         r = sd_bus_message_open_container(m, 'a', "(sv)");
3032         if (r < 0)
3033                 return r;
3034
3035         if (!isempty(slice)) {
3036                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3037                 if (r < 0)
3038                         return r;
3039         }
3040
3041         if (!isempty(description)) {
3042                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3043                 if (r < 0)
3044                         return r;
3045         }
3046
3047         if (!isempty(after)) {
3048                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3049                 if (r < 0)
3050                         return r;
3051         }
3052
3053         if (!isempty(after2)) {
3054                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3055                 if (r < 0)
3056                         return r;
3057         }
3058
3059         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
3060          * SIGTERM */
3061         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3062         if (r < 0)
3063                 return r;
3064
3065         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3066         if (r < 0)
3067                 return r;
3068
3069         /* disable TasksMax= for the session scope, rely on the slice setting for it */
3070         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
3071         if (r < 0)
3072                 return bus_log_create_error(r);
3073
3074         if (more_properties) {
3075                 /* If TasksMax also appears here, it will overwrite the default value set above */
3076                 r = sd_bus_message_copy(m, more_properties, true);
3077                 if (r < 0)
3078                         return r;
3079         }
3080
3081         r = sd_bus_message_close_container(m);
3082         if (r < 0)
3083                 return r;
3084
3085         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3086         if (r < 0)
3087                 return r;
3088
3089         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3090         if (r < 0)
3091                 return r;
3092
3093         return strdup_job(reply, job);
3094 }
3095
3096 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3097         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3098         int r;
3099
3100         assert(manager);
3101         assert(unit);
3102         assert(job);
3103
3104         r = sd_bus_call_method(
3105                         manager->bus,
3106                         "org.freedesktop.systemd1",
3107                         "/org/freedesktop/systemd1",
3108                         "org.freedesktop.systemd1.Manager",
3109                         "StartUnit",
3110                         error,
3111                         &reply,
3112                         "ss", unit, "replace");
3113         if (r < 0)
3114                 return r;
3115
3116         return strdup_job(reply, job);
3117 }
3118
3119 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3120         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3121         int r;
3122
3123         assert(manager);
3124         assert(unit);
3125         assert(job);
3126
3127         r = sd_bus_call_method(
3128                         manager->bus,
3129                         "org.freedesktop.systemd1",
3130                         "/org/freedesktop/systemd1",
3131                         "org.freedesktop.systemd1.Manager",
3132                         "StopUnit",
3133                         error,
3134                         &reply,
3135                         "ss", unit, "fail");
3136         if (r < 0) {
3137                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3138                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3139
3140                         *job = NULL;
3141                         sd_bus_error_free(error);
3142                         return 0;
3143                 }
3144
3145                 return r;
3146         }
3147
3148         return strdup_job(reply, job);
3149 }
3150
3151 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3152         _cleanup_free_ char *path = NULL;
3153         int r;
3154
3155         assert(manager);
3156         assert(scope);
3157
3158         path = unit_dbus_path_from_name(scope);
3159         if (!path)
3160                 return -ENOMEM;
3161
3162         r = sd_bus_call_method(
3163                         manager->bus,
3164                         "org.freedesktop.systemd1",
3165                         path,
3166                         "org.freedesktop.systemd1.Scope",
3167                         "Abandon",
3168                         error,
3169                         NULL,
3170                         NULL);
3171         if (r < 0) {
3172                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3173                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3174                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3175                         sd_bus_error_free(error);
3176                         return 0;
3177                 }
3178
3179                 return r;
3180         }
3181
3182         return 1;
3183 }
3184
3185 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3186         assert(manager);
3187         assert(unit);
3188
3189         return sd_bus_call_method(
3190                         manager->bus,
3191                         "org.freedesktop.systemd1",
3192                         "/org/freedesktop/systemd1",
3193                         "org.freedesktop.systemd1.Manager",
3194                         "KillUnit",
3195                         error,
3196                         NULL,
3197                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3198 }
3199
3200 int manager_unit_is_active(Manager *manager, const char *unit) {
3201         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3202         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3203         _cleanup_free_ char *path = NULL;
3204         const char *state;
3205         int r;
3206
3207         assert(manager);
3208         assert(unit);
3209
3210         path = unit_dbus_path_from_name(unit);
3211         if (!path)
3212                 return -ENOMEM;
3213
3214         r = sd_bus_get_property(
3215                         manager->bus,
3216                         "org.freedesktop.systemd1",
3217                         path,
3218                         "org.freedesktop.systemd1.Unit",
3219                         "ActiveState",
3220                         &error,
3221                         &reply,
3222                         "s");
3223         if (r < 0) {
3224                 /* systemd might have droppped off momentarily, let's
3225                  * not make this an error */
3226                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3227                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3228                         return true;
3229
3230                 /* If the unit is already unloaded then it's not
3231                  * active */
3232                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3233                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3234                         return false;
3235
3236                 return r;
3237         }
3238
3239         r = sd_bus_message_read(reply, "s", &state);
3240         if (r < 0)
3241                 return -EINVAL;
3242
3243         return !streq(state, "inactive") && !streq(state, "failed");
3244 }
3245
3246 int manager_job_is_active(Manager *manager, const char *path) {
3247         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3248         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3249         int r;
3250
3251         assert(manager);
3252         assert(path);
3253
3254         r = sd_bus_get_property(
3255                         manager->bus,
3256                         "org.freedesktop.systemd1",
3257                         path,
3258                         "org.freedesktop.systemd1.Job",
3259                         "State",
3260                         &error,
3261                         &reply,
3262                         "s");
3263         if (r < 0) {
3264                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3265                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3266                         return true;
3267
3268                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3269                         return false;
3270
3271                 return r;
3272         }
3273
3274         /* We don't actually care about the state really. The fact
3275          * that we could read the job state is enough for us */
3276
3277         return true;
3278 }