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 method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 336         _cleanup_free_ char *p = NULL;
 337         Manager *m = userdata;
 338         const char *name;
 339         Session *session;
 340         int r;
 341
 342         assert(message);
 343         assert(m);
 344
 345         r = sd_bus_message_read(message, "s", &name);
 346         if (r < 0)
 347                 return r;
 348
 349         r = manager_get_session_from_creds(m, message, name, error, &session);
 350         if (r < 0)
 351                 return r;
 352
 353         p = session_bus_path(session);
 354         if (!p)
 355                 return -ENOMEM;
 356
 357         return sd_bus_reply_method_return(message, "o", p);
 358 }
 359
 360 /* Get login session of a process.  This is not what you are looking for these days,
 361  * as apps may instead belong to a user service unit.  This includes terminal
 362  * emulators and hence command-line apps. */
 363 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 364         _cleanup_free_ char *p = NULL;
 365         Session *session = NULL;
 366         Manager *m = userdata;
 367         pid_t pid;
 368         int r;
 369
 370         assert(message);
 371         assert(m);
 372
 373         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 374
 375         r = sd_bus_message_read(message, "u", &pid);
 376         if (r < 0)
 377                 return r;
 378         if (pid < 0)
 379                 return -EINVAL;
 380
 381         if (pid == 0) {
 382                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 383                 if (r < 0)
 384                         return r;
 385         } else {
 386                 r = manager_get_session_by_pid(m, pid, &session);
 387                 if (r < 0)
 388                         return r;
 389
 390                 if (!session)
 391                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 392         }
 393
 394         p = session_bus_path(session);
 395         if (!p)
 396                 return -ENOMEM;
 397
 398         return sd_bus_reply_method_return(message, "o", p);
 399 }
 400
 401 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 402         _cleanup_free_ char *p = NULL;
 403         Manager *m = userdata;
 404         uint32_t uid;
 405         User *user;
 406         int r;
 407
 408         assert(message);
 409         assert(m);
 410
 411         r = sd_bus_message_read(message, "u", &uid);
 412         if (r < 0)
 413                 return r;
 414
 415         r = manager_get_user_from_creds(m, message, uid, error, &user);
 416         if (r < 0)
 417                 return r;
 418
 419         p = user_bus_path(user);
 420         if (!p)
 421                 return -ENOMEM;
 422
 423         return sd_bus_reply_method_return(message, "o", p);
 424 }
 425
 426 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 427         _cleanup_free_ char *p = NULL;
 428         Manager *m = userdata;
 429         User *user = NULL;
 430         pid_t pid;
 431         int r;
 432
 433         assert(message);
 434         assert(m);
 435
 436         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 437
 438         r = sd_bus_message_read(message, "u", &pid);
 439         if (r < 0)
 440                 return r;
 441         if (pid < 0)
 442                 return -EINVAL;
 443
 444         if (pid == 0) {
 445                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 446                 if (r < 0)
 447                         return r;
 448         } else {
 449                 r = manager_get_user_by_pid(m, pid, &user);
 450                 if (r < 0)
 451                         return r;
 452                 if (!user)
 453                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 454                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 455                                                  pid);
 456         }
 457
 458         p = user_bus_path(user);
 459         if (!p)
 460                 return -ENOMEM;
 461
 462         return sd_bus_reply_method_return(message, "o", p);
 463 }
 464
 465 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 466         _cleanup_free_ char *p = NULL;
 467         Manager *m = userdata;
 468         const char *name;
 469         Seat *seat;
 470         int r;
 471
 472         assert(message);
 473         assert(m);
 474
 475         r = sd_bus_message_read(message, "s", &name);
 476         if (r < 0)
 477                 return r;
 478
 479         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 480         if (r < 0)
 481                 return r;
 482
 483         p = seat_bus_path(seat);
 484         if (!p)
 485                 return -ENOMEM;
 486
 487         return sd_bus_reply_method_return(message, "o", p);
 488 }
 489
 490 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 491         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 492         Manager *m = userdata;
 493         Session *session;
 494         Iterator i;
 495         int r;
 496
 497         assert(message);
 498         assert(m);
 499
 500         r = sd_bus_message_new_method_return(message, &reply);
 501         if (r < 0)
 502                 return r;
 503
 504         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 505         if (r < 0)
 506                 return r;
 507
 508         HASHMAP_FOREACH(session, m->sessions, i) {
 509                 _cleanup_free_ char *p = NULL;
 510
 511                 p = session_bus_path(session);
 512                 if (!p)
 513                         return -ENOMEM;
 514
 515                 r = sd_bus_message_append(reply, "(susso)",
 516                                           session->id,
 517                                           (uint32_t) session->user->uid,
 518                                           session->user->name,
 519                                           session->seat ? session->seat->id : "",
 520                                           p);
 521                 if (r < 0)
 522                         return r;
 523         }
 524
 525         r = sd_bus_message_close_container(reply);
 526         if (r < 0)
 527                 return r;
 528
 529         return sd_bus_send(NULL, reply, NULL);
 530 }
 531
 532 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 533         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 534         Manager *m = userdata;
 535         User *user;
 536         Iterator i;
 537         int r;
 538
 539         assert(message);
 540         assert(m);
 541
 542         r = sd_bus_message_new_method_return(message, &reply);
 543         if (r < 0)
 544                 return r;
 545
 546         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 547         if (r < 0)
 548                 return r;
 549
 550         HASHMAP_FOREACH(user, m->users, i) {
 551                 _cleanup_free_ char *p = NULL;
 552
 553                 p = user_bus_path(user);
 554                 if (!p)
 555                         return -ENOMEM;
 556
 557                 r = sd_bus_message_append(reply, "(uso)",
 558                                           (uint32_t) user->uid,
 559                                           user->name,
 560                                           p);
 561                 if (r < 0)
 562                         return r;
 563         }
 564
 565         r = sd_bus_message_close_container(reply);
 566         if (r < 0)
 567                 return r;
 568
 569         return sd_bus_send(NULL, reply, NULL);
 570 }
 571
 572 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 573         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 574         Manager *m = userdata;
 575         Seat *seat;
 576         Iterator i;
 577         int r;
 578
 579         assert(message);
 580         assert(m);
 581
 582         r = sd_bus_message_new_method_return(message, &reply);
 583         if (r < 0)
 584                 return r;
 585
 586         r = sd_bus_message_open_container(reply, 'a', "(so)");
 587         if (r < 0)
 588                 return r;
 589
 590         HASHMAP_FOREACH(seat, m->seats, i) {
 591                 _cleanup_free_ char *p = NULL;
 592
 593                 p = seat_bus_path(seat);
 594                 if (!p)
 595                         return -ENOMEM;
 596
 597                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 598                 if (r < 0)
 599                         return r;
 600         }
 601
 602         r = sd_bus_message_close_container(reply);
 603         if (r < 0)
 604                 return r;
 605
 606         return sd_bus_send(NULL, reply, NULL);
 607 }
 608
 609 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 610         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 611         Manager *m = userdata;
 612         Inhibitor *inhibitor;
 613         Iterator i;
 614         int r;
 615
 616         assert(message);
 617         assert(m);
 618
 619         r = sd_bus_message_new_method_return(message, &reply);
 620         if (r < 0)
 621                 return r;
 622
 623         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 624         if (r < 0)
 625                 return r;
 626
 627         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 628
 629                 r = sd_bus_message_append(reply, "(ssssuu)",
 630                                           strempty(inhibit_what_to_string(inhibitor->what)),
 631                                           strempty(inhibitor->who),
 632                                           strempty(inhibitor->why),
 633                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 634                                           (uint32_t) inhibitor->uid,
 635                                           (uint32_t) inhibitor->pid);
 636                 if (r < 0)
 637                         return r;
 638         }
 639
 640         r = sd_bus_message_close_container(reply);
 641         if (r < 0)
 642                 return r;
 643
 644         return sd_bus_send(NULL, reply, NULL);
 645 }
 646
 647 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 648         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 649         _cleanup_free_ char *id = NULL;
 650         Session *session = NULL;
 651         uint32_t audit_id = 0;
 652         Manager *m = userdata;
 653         User *user = NULL;
 654         Seat *seat = NULL;
 655         pid_t leader;
 656         uid_t uid;
 657         int remote;
 658         uint32_t vtnr = 0;
 659         SessionType t;
 660         SessionClass c;
 661         int r;
 662
 663         assert(message);
 664         assert(m);
 665
 666         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 667         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 668
 669         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 670         if (r < 0)
 671                 return r;
 672
 673         if (!uid_is_valid(uid))
 674                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 675         if (leader < 0 || leader == 1 || leader == getpid_cached())
 676                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 677
 678         if (isempty(type))
 679                 t = _SESSION_TYPE_INVALID;
 680         else {
 681                 t = session_type_from_string(type);
 682                 if (t < 0)
 683                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 684         }
 685
 686         if (isempty(class))
 687                 c = _SESSION_CLASS_INVALID;
 688         else {
 689                 c = session_class_from_string(class);
 690                 if (c < 0)
 691                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 692         }
 693
 694         if (isempty(desktop))
 695                 desktop = NULL;
 696         else {
 697                 if (!string_is_safe(desktop))
 698                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 699         }
 700
 701         if (isempty(cseat))
 702                 seat = NULL;
 703         else {
 704                 seat = hashmap_get(m->seats, cseat);
 705                 if (!seat)
 706                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 707         }
 708
 709         if (tty_is_vc(tty)) {
 710                 int v;
 711
 712                 if (!seat)
 713                         seat = m->seat0;
 714                 else if (seat != m->seat0)
 715                         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);
 716
 717                 v = vtnr_from_tty(tty);
 718                 if (v <= 0)
 719                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 720
 721                 if (vtnr == 0)
 722                         vtnr = (uint32_t) v;
 723                 else if (vtnr != (uint32_t) v)
 724                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 725
 726         } else if (tty_is_console(tty)) {
 727
 728                 if (!seat)
 729                         seat = m->seat0;
 730                 else if (seat != m->seat0)
 731                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 732
 733                 if (vtnr != 0)
 734                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 735         }
 736
 737         if (seat) {
 738                 if (seat_has_vts(seat)) {
 739                         if (vtnr <= 0 || vtnr > 63)
 740                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 741                 } else {
 742                         if (vtnr != 0)
 743                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 744                 }
 745         }
 746
 747         if (t == _SESSION_TYPE_INVALID) {
 748                 if (!isempty(display))
 749                         t = SESSION_X11;
 750                 else if (!isempty(tty))
 751                         t = SESSION_TTY;
 752                 else
 753                         t = SESSION_UNSPECIFIED;
 754         }
 755
 756         if (c == _SESSION_CLASS_INVALID) {
 757                 if (t == SESSION_UNSPECIFIED)
 758                         c = SESSION_BACKGROUND;
 759                 else
 760                         c = SESSION_USER;
 761         }
 762
 763         if (leader == 0) {
 764                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 765
 766                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 767                 if (r < 0)
 768                         return r;
 769
 770                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 771                 if (r < 0)
 772                         return r;
 773         }
 774
 775         /* Check if we are already in a logind session. Or if we are in user@.service which is a special PAM session
 776          * that avoids creating a logind session. */
 777         r = manager_get_user_by_pid(m, leader, NULL);
 778         if (r < 0)
 779                 return r;
 780         if (r > 0)
 781                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session or user slice");
 782
 783         /*
 784          * Old gdm and lightdm start the user-session on the same VT as
 785          * the greeter session. But they destroy the greeter session
 786          * after the user-session and want the user-session to take
 787          * over the VT. We need to support this for
 788          * backwards-compatibility, so make sure we allow new sessions
 789          * on a VT that a greeter is running on. Furthermore, to allow
 790          * re-logins, we have to allow a greeter to take over a used VT for
 791          * the exact same reasons.
 792          */
 793         if (c != SESSION_GREETER &&
 794             vtnr > 0 &&
 795             vtnr < m->seat0->position_count &&
 796             m->seat0->positions[vtnr] &&
 797             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 798                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 799
 800         if (hashmap_size(m->sessions) >= m->sessions_max)
 801                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 802
 803         (void) audit_session_from_pid(leader, &audit_id);
 804         if (audit_session_is_valid(audit_id)) {
 805                 /* Keep our session IDs and the audit session IDs in sync */
 806
 807                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 808                         return -ENOMEM;
 809
 810                 /* Wut? There's already a session by this name and we
 811                  * didn't find it above? Weird, then let's not trust
 812                  * the audit data and let's better register a new
 813                  * ID */
 814                 if (hashmap_get(m->sessions, id)) {
 815                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 816                         audit_id = AUDIT_SESSION_INVALID;
 817                         id = mfree(id);
 818                 }
 819         }
 820
 821         if (!id) {
 822                 do {
 823                         id = mfree(id);
 824
 825                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 826                                 return -ENOMEM;
 827
 828                 } while (hashmap_get(m->sessions, id));
 829         }
 830
 831         r = manager_add_user_by_uid(m, uid, &user);
 832         if (r < 0)
 833                 goto fail;
 834
 835         r = manager_add_session(m, id, &session);
 836         if (r < 0)
 837                 goto fail;
 838
 839         session_set_user(session, user);
 840
 841         session->leader = leader;
 842         session->audit_id = audit_id;
 843         session->type = t;
 844         session->class = c;
 845         session->remote = remote;
 846         session->vtnr = vtnr;
 847
 848         if (!isempty(tty)) {
 849                 session->tty = strdup(tty);
 850                 if (!session->tty) {
 851                         r = -ENOMEM;
 852                         goto fail;
 853                 }
 854         }
 855
 856         if (!isempty(display)) {
 857                 session->display = strdup(display);
 858                 if (!session->display) {
 859                         r = -ENOMEM;
 860                         goto fail;
 861                 }
 862         }
 863
 864         if (!isempty(remote_user)) {
 865                 session->remote_user = strdup(remote_user);
 866                 if (!session->remote_user) {
 867                         r = -ENOMEM;
 868                         goto fail;
 869                 }
 870         }
 871
 872         if (!isempty(remote_host)) {
 873                 session->remote_host = strdup(remote_host);
 874                 if (!session->remote_host) {
 875                         r = -ENOMEM;
 876                         goto fail;
 877                 }
 878         }
 879
 880         if (!isempty(service)) {
 881                 session->service = strdup(service);
 882                 if (!session->service) {
 883                         r = -ENOMEM;
 884                         goto fail;
 885                 }
 886         }
 887
 888         if (!isempty(desktop)) {
 889                 session->desktop = strdup(desktop);
 890                 if (!session->desktop) {
 891                         r = -ENOMEM;
 892                         goto fail;
 893                 }
 894         }
 895
 896         if (seat) {
 897                 r = seat_attach_session(seat, session);
 898                 if (r < 0)
 899                         goto fail;
 900         }
 901
 902         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 903         if (r < 0)
 904                 return r;
 905
 906         r = session_start(session, message);
 907         if (r < 0)
 908                 goto fail;
 909
 910         r = sd_bus_message_exit_container(message);
 911         if (r < 0)
 912                 goto fail;
 913
 914         session->create_message = sd_bus_message_ref(message);
 915
 916         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 917          * session_send_create_reply(). */
 918
 919         return 1;
 920
 921 fail:
 922         if (session)
 923                 session_add_to_gc_queue(session);
 924
 925         if (user)
 926                 user_add_to_gc_queue(user);
 927
 928         return r;
 929 }
 930
 931 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 932         Manager *m = userdata;
 933         Session *session;
 934         const char *name;
 935         int r;
 936
 937         assert(message);
 938         assert(m);
 939
 940         r = sd_bus_message_read(message, "s", &name);
 941         if (r < 0)
 942                 return r;
 943
 944         r = manager_get_session_from_creds(m, message, name, error, &session);
 945         if (r < 0)
 946                 return r;
 947
 948         r = session_release(session);
 949         if (r < 0)
 950                 return r;
 951
 952         return sd_bus_reply_method_return(message, NULL);
 953 }
 954
 955 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 956         Manager *m = userdata;
 957         Session *session;
 958         const char *name;
 959         int r;
 960
 961         assert(message);
 962         assert(m);
 963
 964         r = sd_bus_message_read(message, "s", &name);
 965         if (r < 0)
 966                 return r;
 967
 968         r = manager_get_session_from_creds(m, message, name, error, &session);
 969         if (r < 0)
 970                 return r;
 971
 972         return bus_session_method_activate(message, session, error);
 973 }
 974
 975 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 976         const char *session_name, *seat_name;
 977         Manager *m = userdata;
 978         Session *session;
 979         Seat *seat;
 980         int r;
 981
 982         assert(message);
 983         assert(m);
 984
 985         /* Same as ActivateSession() but refuses to work if
 986          * the seat doesn't match */
 987
 988         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 989         if (r < 0)
 990                 return r;
 991
 992         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 993         if (r < 0)
 994                 return r;
 995
 996         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 997         if (r < 0)
 998                 return r;
 999
1000         if (session->seat != seat)
1001                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
1002
1003         r = session_activate(session);
1004         if (r < 0)
1005                 return r;
1006
1007         return sd_bus_reply_method_return(message, NULL);
1008 }
1009
1010 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1011         Manager *m = userdata;
1012         Session *session;
1013         const char *name;
1014         int r;
1015
1016         assert(message);
1017         assert(m);
1018
1019         r = sd_bus_message_read(message, "s", &name);
1020         if (r < 0)
1021                 return r;
1022
1023         r = manager_get_session_from_creds(m, message, name, error, &session);
1024         if (r < 0)
1025                 return r;
1026
1027         return bus_session_method_lock(message, session, error);
1028 }
1029
1030 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1031         Manager *m = userdata;
1032         int r;
1033
1034         assert(message);
1035         assert(m);
1036
1037         r = bus_verify_polkit_async(
1038                         message,
1039                         CAP_SYS_ADMIN,
1040                         "org.freedesktop.login1.lock-sessions",
1041                         NULL,
1042                         false,
1043                         UID_INVALID,
1044                         &m->polkit_registry,
1045                         error);
1046         if (r < 0)
1047                 return r;
1048         if (r == 0)
1049                 return 1; /* Will call us back */
1050
1051         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1052         if (r < 0)
1053                 return r;
1054
1055         return sd_bus_reply_method_return(message, NULL);
1056 }
1057
1058 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1059         const char *name;
1060         Manager *m = userdata;
1061         Session *session;
1062         int r;
1063
1064         assert(message);
1065         assert(m);
1066
1067         r = sd_bus_message_read(message, "s", &name);
1068         if (r < 0)
1069                 return r;
1070
1071         r = manager_get_session_from_creds(m, message, name, error, &session);
1072         if (r < 0)
1073                 return r;
1074
1075         return bus_session_method_kill(message, session, error);
1076 }
1077
1078 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1079         Manager *m = userdata;
1080         uint32_t uid;
1081         User *user;
1082         int r;
1083
1084         assert(message);
1085         assert(m);
1086
1087         r = sd_bus_message_read(message, "u", &uid);
1088         if (r < 0)
1089                 return r;
1090
1091         r = manager_get_user_from_creds(m, message, uid, error, &user);
1092         if (r < 0)
1093                 return r;
1094
1095         return bus_user_method_kill(message, user, error);
1096 }
1097
1098 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1099         Manager *m = userdata;
1100         const char *name;
1101         Session *session;
1102         int r;
1103
1104         assert(message);
1105         assert(m);
1106
1107         r = sd_bus_message_read(message, "s", &name);
1108         if (r < 0)
1109                 return r;
1110
1111         r = manager_get_session_from_creds(m, message, name, error, &session);
1112         if (r < 0)
1113                 return r;
1114
1115         return bus_session_method_terminate(message, session, error);
1116 }
1117
1118 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1119         Manager *m = userdata;
1120         uint32_t uid;
1121         User *user;
1122         int r;
1123
1124         assert(message);
1125         assert(m);
1126
1127         r = sd_bus_message_read(message, "u", &uid);
1128         if (r < 0)
1129                 return r;
1130
1131         r = manager_get_user_from_creds(m, message, uid, error, &user);
1132         if (r < 0)
1133                 return r;
1134
1135         return bus_user_method_terminate(message, user, error);
1136 }
1137
1138 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1139         Manager *m = userdata;
1140         const char *name;
1141         Seat *seat;
1142         int r;
1143
1144         assert(message);
1145         assert(m);
1146
1147         r = sd_bus_message_read(message, "s", &name);
1148         if (r < 0)
1149                 return r;
1150
1151         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1152         if (r < 0)
1153                 return r;
1154
1155         return bus_seat_method_terminate(message, seat, error);
1156 }
1157
1158 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1159         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1160         _cleanup_free_ char *cc = NULL;
1161         Manager *m = userdata;
1162         int r, b, interactive;
1163         struct passwd *pw;
1164         const char *path;
1165         uint32_t uid, auth_uid;
1166
1167         assert(message);
1168         assert(m);
1169
1170         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1171         if (r < 0)
1172                 return r;
1173
1174         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1175                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1176         if (r < 0)
1177                 return r;
1178
1179         if (!uid_is_valid(uid)) {
1180                 /* Note that we get the owner UID of the session or user unit,
1181                  * not the actual client UID here! */
1182                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1183                 if (r < 0)
1184                         return r;
1185         }
1186
1187         /* owner_uid is racy, so for authorization we must use euid */
1188         r = sd_bus_creds_get_euid(creds, &auth_uid);
1189         if (r < 0)
1190                 return r;
1191
1192         errno = 0;
1193         pw = getpwuid(uid);
1194         if (!pw)
1195                 return errno > 0 ? -errno : -ENOENT;
1196
1197         r = bus_verify_polkit_async(
1198                         message,
1199                         CAP_SYS_ADMIN,
1200                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1201                                           "org.freedesktop.login1.set-user-linger",
1202                         NULL,
1203                         interactive,
1204                         UID_INVALID,
1205                         &m->polkit_registry,
1206                         error);
1207         if (r < 0)
1208                 return r;
1209         if (r == 0)
1210                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1211
1212         mkdir_p_label("/var/lib/systemd", 0755);
1213
1214         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1215         if (r < 0)
1216                 return r;
1217
1218         cc = cescape(pw->pw_name);
1219         if (!cc)
1220                 return -ENOMEM;
1221
1222         path = strjoina("/var/lib/systemd/linger/", cc);
1223         if (b) {
1224                 User *u;
1225
1226                 r = touch(path);
1227                 if (r < 0)
1228                         return r;
1229
1230                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1231                         user_start(u);
1232
1233         } else {
1234                 User *u;
1235
1236                 r = unlink(path);
1237                 if (r < 0 && errno != ENOENT)
1238                         return -errno;
1239
1240                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1241                 if (u)
1242                         user_add_to_gc_queue(u);
1243         }
1244
1245         return sd_bus_reply_method_return(message, NULL);
1246 }
1247
1248 static int trigger_device(Manager *m, struct udev_device *d) {
1249         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1250         struct udev_list_entry *first, *item;
1251         int r;
1252
1253         assert(m);
1254
1255         e = udev_enumerate_new(m->udev);
1256         if (!e)
1257                 return -ENOMEM;
1258
1259         if (d) {
1260                 r = udev_enumerate_add_match_parent(e, d);
1261                 if (r < 0)
1262                         return r;
1263         }
1264
1265         r = udev_enumerate_scan_devices(e);
1266         if (r < 0)
1267                 return r;
1268
1269         first = udev_enumerate_get_list_entry(e);
1270         udev_list_entry_foreach(item, first) {
1271                 _cleanup_free_ char *t = NULL;
1272                 const char *p;
1273
1274                 p = udev_list_entry_get_name(item);
1275
1276                 t = strappend(p, "/uevent");
1277                 if (!t)
1278                         return -ENOMEM;
1279
1280                 (void) write_string_file(t, "change", 0);
1281         }
1282
1283         return 0;
1284 }
1285
1286 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1287         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1288         _cleanup_free_ char *rule = NULL, *file = NULL;
1289         const char *id_for_seat;
1290         int r;
1291
1292         assert(m);
1293         assert(seat);
1294         assert(sysfs);
1295
1296         d = udev_device_new_from_syspath(m->udev, sysfs);
1297         if (!d)
1298                 return -ENODEV;
1299
1300         if (!udev_device_has_tag(d, "seat"))
1301                 return -ENODEV;
1302
1303         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1304         if (!id_for_seat)
1305                 return -ENODEV;
1306
1307         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1308                 return -ENOMEM;
1309
1310         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1311                 return -ENOMEM;
1312
1313         mkdir_p_label("/etc/udev/rules.d", 0755);
1314         r = write_string_file_atomic_label(file, rule);
1315         if (r < 0)
1316                 return r;
1317
1318         return trigger_device(m, d);
1319 }
1320
1321 static int flush_devices(Manager *m) {
1322         _cleanup_closedir_ DIR *d;
1323
1324         assert(m);
1325
1326         d = opendir("/etc/udev/rules.d");
1327         if (!d) {
1328                 if (errno != ENOENT)
1329                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1330         } else {
1331                 struct dirent *de;
1332
1333                 FOREACH_DIRENT_ALL(de, d, break) {
1334                         if (!dirent_is_file(de))
1335                                 continue;
1336
1337                         if (!startswith(de->d_name, "72-seat-"))
1338                                 continue;
1339
1340                         if (!endswith(de->d_name, ".rules"))
1341                                 continue;
1342
1343                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1344                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1345                 }
1346         }
1347
1348         return trigger_device(m, NULL);
1349 }
1350
1351 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1352         const char *sysfs, *seat;
1353         Manager *m = userdata;
1354         int interactive, r;
1355
1356         assert(message);
1357         assert(m);
1358
1359         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1360         if (r < 0)
1361                 return r;
1362
1363         if (!path_startswith(sysfs, "/sys"))
1364                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1365
1366         if (!seat_name_is_valid(seat))
1367                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1368
1369         r = bus_verify_polkit_async(
1370                         message,
1371                         CAP_SYS_ADMIN,
1372                         "org.freedesktop.login1.attach-device",
1373                         NULL,
1374                         interactive,
1375                         UID_INVALID,
1376                         &m->polkit_registry,
1377                         error);
1378         if (r < 0)
1379                 return r;
1380         if (r == 0)
1381                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1382
1383         r = attach_device(m, seat, sysfs);
1384         if (r < 0)
1385                 return r;
1386
1387         return sd_bus_reply_method_return(message, NULL);
1388 }
1389
1390 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1391         Manager *m = userdata;
1392         int interactive, r;
1393
1394         assert(message);
1395         assert(m);
1396
1397         r = sd_bus_message_read(message, "b", &interactive);
1398         if (r < 0)
1399                 return r;
1400
1401         r = bus_verify_polkit_async(
1402                         message,
1403                         CAP_SYS_ADMIN,
1404                         "org.freedesktop.login1.flush-devices",
1405                         NULL,
1406                         interactive,
1407                         UID_INVALID,
1408                         &m->polkit_registry,
1409                         error);
1410         if (r < 0)
1411                 return r;
1412         if (r == 0)
1413                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1414
1415         r = flush_devices(m);
1416         if (r < 0)
1417                 return r;
1418
1419         return sd_bus_reply_method_return(message, NULL);
1420 }
1421
1422 static int have_multiple_sessions(
1423                 Manager *m,
1424                 uid_t uid) {
1425
1426         Session *session;
1427         Iterator i;
1428
1429         assert(m);
1430
1431         /* Check for other users' sessions. Greeter sessions do not
1432          * count, and non-login sessions do not count either. */
1433         HASHMAP_FOREACH(session, m->sessions, i)
1434                 if (session->class == SESSION_USER &&
1435                     session->user->uid != uid)
1436                         return true;
1437
1438         return false;
1439 }
1440
1441 static int bus_manager_log_shutdown(
1442                 Manager *m,
1443                 const char *unit_name) {
1444
1445         const char *p, *q;
1446
1447         assert(m);
1448         assert(unit_name);
1449
1450         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1451                 p = "MESSAGE=System is powering down";
1452                 q = "SHUTDOWN=power-off";
1453         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1454                 p = "MESSAGE=System is rebooting";
1455                 q = "SHUTDOWN=reboot";
1456         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1457                 p = "MESSAGE=System is halting";
1458                 q = "SHUTDOWN=halt";
1459         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1460                 p = "MESSAGE=System is rebooting with kexec";
1461                 q = "SHUTDOWN=kexec";
1462         } else {
1463                 p = "MESSAGE=System is shutting down";
1464                 q = NULL;
1465         }
1466
1467         if (isempty(m->wall_message))
1468                 p = strjoina(p, ".");
1469         else
1470                 p = strjoina(p, " (", m->wall_message, ").");
1471
1472         return log_struct(LOG_NOTICE,
1473                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1474                           p,
1475                           q,
1476                           NULL);
1477 }
1478
1479 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1480         Manager *m = userdata;
1481
1482         assert(e);
1483         assert(m);
1484
1485         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1486         return 0;
1487 }
1488
1489 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1490         int r;
1491
1492         assert(m);
1493
1494         if (until <= now(CLOCK_MONOTONIC))
1495                 return 0;
1496
1497         /* We want to ignore the lid switch for a while after each
1498          * suspend, and after boot-up. Hence let's install a timer for
1499          * this. As long as the event source exists we ignore the lid
1500          * switch. */
1501
1502         if (m->lid_switch_ignore_event_source) {
1503                 usec_t u;
1504
1505                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1506                 if (r < 0)
1507                         return r;
1508
1509                 if (until <= u)
1510                         return 0;
1511
1512                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1513         } else
1514                 r = sd_event_add_time(
1515                                 m->event,
1516                                 &m->lid_switch_ignore_event_source,
1517                                 CLOCK_MONOTONIC,
1518                                 until, 0,
1519                                 lid_switch_ignore_handler, m);
1520
1521         return r;
1522 }
1523
1524 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1525
1526         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1527                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1528                 [INHIBIT_SLEEP] = "PrepareForSleep"
1529         };
1530
1531         int active = _active;
1532
1533         assert(m);
1534         assert(w >= 0);
1535         assert(w < _INHIBIT_WHAT_MAX);
1536         assert(signal_name[w]);
1537
1538         return sd_bus_emit_signal(m->bus,
1539                                   "/org/freedesktop/login1",
1540                                   "org.freedesktop.login1.Manager",
1541                                   signal_name[w],
1542                                   "b",
1543                                   active);
1544 }
1545
1546 static int execute_shutdown_or_sleep(
1547                 Manager *m,
1548                 InhibitWhat w,
1549                 const char *unit_name,
1550                 sd_bus_error *error) {
1551
1552         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1553         char *c = NULL;
1554         const char *p;
1555         int r;
1556
1557         assert(m);
1558         assert(w > 0);
1559         assert(w < _INHIBIT_WHAT_MAX);
1560         assert(unit_name);
1561
1562         if (w == INHIBIT_SHUTDOWN)
1563                 bus_manager_log_shutdown(m, unit_name);
1564
1565         r = sd_bus_call_method(
1566                         m->bus,
1567                         "org.freedesktop.systemd1",
1568                         "/org/freedesktop/systemd1",
1569                         "org.freedesktop.systemd1.Manager",
1570                         "StartUnit",
1571                         error,
1572                         &reply,
1573                         "ss", unit_name, "replace-irreversibly");
1574         if (r < 0)
1575                 goto error;
1576
1577         r = sd_bus_message_read(reply, "o", &p);
1578         if (r < 0)
1579                 goto error;
1580
1581         c = strdup(p);
1582         if (!c) {
1583                 r = -ENOMEM;
1584                 goto error;
1585         }
1586
1587         m->action_unit = unit_name;
1588         free(m->action_job);
1589         m->action_job = c;
1590         m->action_what = w;
1591
1592         /* Make sure the lid switch is ignored for a while */
1593         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1594
1595         return 0;
1596
1597 error:
1598         /* Tell people that they now may take a lock again */
1599         (void) send_prepare_for(m, w, false);
1600
1601         return r;
1602 }
1603
1604 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1605
1606         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1607         Inhibitor *offending = NULL;
1608         int r;
1609
1610         assert(manager);
1611
1612         if (manager->action_what == 0 || manager->action_job)
1613                 return 0;
1614
1615         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1616                 _cleanup_free_ char *comm = NULL, *u = NULL;
1617
1618                 if (!timeout)
1619                         return 0;
1620
1621                 (void) get_process_comm(offending->pid, &comm);
1622                 u = uid_to_name(offending->uid);
1623
1624                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1625                            offending->uid, strna(u),
1626                            offending->pid, strna(comm));
1627         }
1628
1629         /* Actually do the operation */
1630         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1631         if (r < 0) {
1632                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1633                             bus_error_message(&error, r));
1634
1635                 manager->action_unit = NULL;
1636                 manager->action_what = 0;
1637                 return r;
1638         }
1639
1640         return 1;
1641 }
1642
1643 static int manager_inhibit_timeout_handler(
1644                         sd_event_source *s,
1645                         uint64_t usec,
1646                         void *userdata) {
1647
1648         Manager *manager = userdata;
1649         int r;
1650
1651         assert(manager);
1652         assert(manager->inhibit_timeout_source == s);
1653
1654         r = manager_dispatch_delayed(manager, true);
1655         return (r < 0) ? r : 0;
1656 }
1657
1658 static int delay_shutdown_or_sleep(
1659                 Manager *m,
1660                 InhibitWhat w,
1661                 const char *unit_name) {
1662
1663         int r;
1664         usec_t timeout_val;
1665
1666         assert(m);
1667         assert(w >= 0);
1668         assert(w < _INHIBIT_WHAT_MAX);
1669         assert(unit_name);
1670
1671         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1672
1673         if (m->inhibit_timeout_source) {
1674                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1675                 if (r < 0)
1676                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1677
1678                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1679                 if (r < 0)
1680                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1681         } else {
1682                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1683                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1684                 if (r < 0)
1685                         return r;
1686         }
1687
1688         m->action_unit = unit_name;
1689         m->action_what = w;
1690
1691         return 0;
1692 }
1693
1694 int bus_manager_shutdown_or_sleep_now_or_later(
1695                 Manager *m,
1696                 const char *unit_name,
1697                 InhibitWhat w,
1698                 sd_bus_error *error) {
1699
1700         _cleanup_free_ char *load_state = NULL;
1701         bool delayed;
1702         int r;
1703
1704         assert(m);
1705         assert(unit_name);
1706         assert(w > 0);
1707         assert(w <= _INHIBIT_WHAT_MAX);
1708         assert(!m->action_job);
1709
1710         r = unit_load_state(m->bus, unit_name, &load_state);
1711         if (r < 0)
1712                 return r;
1713
1714         if (!streq(load_state, "loaded")) {
1715                 log_notice("Unit %s is %s, refusing operation.", unit_name, load_state);
1716                 return -EACCES;
1717         }
1718
1719         /* Tell everybody to prepare for shutdown/sleep */
1720         (void) send_prepare_for(m, w, true);
1721
1722         delayed =
1723                 m->inhibit_delay_max > 0 &&
1724                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1725
1726         if (delayed)
1727                 /* Shutdown is delayed, keep in mind what we
1728                  * want to do, and start a timeout */
1729                 r = delay_shutdown_or_sleep(m, w, unit_name);
1730         else
1731                 /* Shutdown is not delayed, execute it
1732                  * immediately */
1733                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1734
1735         return r;
1736 }
1737
1738 static int verify_shutdown_creds(
1739                 Manager *m,
1740                 sd_bus_message *message,
1741                 InhibitWhat w,
1742                 bool interactive,
1743                 const char *action,
1744                 const char *action_multiple_sessions,
1745                 const char *action_ignore_inhibit,
1746                 sd_bus_error *error) {
1747
1748         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1749         bool multiple_sessions, blocked;
1750         uid_t uid;
1751         int r;
1752
1753         assert(m);
1754         assert(message);
1755         assert(w >= 0);
1756         assert(w <= _INHIBIT_WHAT_MAX);
1757
1758         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1759         if (r < 0)
1760                 return r;
1761
1762         r = sd_bus_creds_get_euid(creds, &uid);
1763         if (r < 0)
1764                 return r;
1765
1766         r = have_multiple_sessions(m, uid);
1767         if (r < 0)
1768                 return r;
1769
1770         multiple_sessions = r > 0;
1771         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1772
1773         if (multiple_sessions && action_multiple_sessions) {
1774                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1775                 if (r < 0)
1776                         return r;
1777                 if (r == 0)
1778                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1779         }
1780
1781         if (blocked && action_ignore_inhibit) {
1782                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1783                 if (r < 0)
1784                         return r;
1785                 if (r == 0)
1786                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1787         }
1788
1789         if (!multiple_sessions && !blocked && action) {
1790                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1791                 if (r < 0)
1792                         return r;
1793                 if (r == 0)
1794                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1795         }
1796
1797         return 0;
1798 }
1799
1800 static int method_do_shutdown_or_sleep(
1801                 Manager *m,
1802                 sd_bus_message *message,
1803                 const char *unit_name,
1804                 InhibitWhat w,
1805                 const char *action,
1806                 const char *action_multiple_sessions,
1807                 const char *action_ignore_inhibit,
1808                 const char *sleep_verb,
1809                 sd_bus_error *error) {
1810
1811         int interactive, r;
1812
1813         assert(m);
1814         assert(message);
1815         assert(unit_name);
1816         assert(w >= 0);
1817         assert(w <= _INHIBIT_WHAT_MAX);
1818
1819         r = sd_bus_message_read(message, "b", &interactive);
1820         if (r < 0)
1821                 return r;
1822
1823         /* Don't allow multiple jobs being executed at the same time */
1824         if (m->action_what)
1825                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1826
1827         if (sleep_verb) {
1828                 r = can_sleep(sleep_verb);
1829                 if (r == -ENOSPC)
1830                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1831                                                 "Not enough swap space for hibernation");
1832                 if (r == 0)
1833                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1834                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1835                 if (r < 0)
1836                         return r;
1837         }
1838
1839         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1840                                   action_ignore_inhibit, error);
1841         if (r != 0)
1842                 return r;
1843
1844         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1845         if (r < 0)
1846                 return r;
1847
1848         return sd_bus_reply_method_return(message, NULL);
1849 }
1850
1851 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1852         Manager *m = userdata;
1853
1854         return method_do_shutdown_or_sleep(
1855                         m, message,
1856                         SPECIAL_POWEROFF_TARGET,
1857                         INHIBIT_SHUTDOWN,
1858                         "org.freedesktop.login1.power-off",
1859                         "org.freedesktop.login1.power-off-multiple-sessions",
1860                         "org.freedesktop.login1.power-off-ignore-inhibit",
1861                         NULL,
1862                         error);
1863 }
1864
1865 static int method_reboot(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_REBOOT_TARGET,
1871                         INHIBIT_SHUTDOWN,
1872                         "org.freedesktop.login1.reboot",
1873                         "org.freedesktop.login1.reboot-multiple-sessions",
1874                         "org.freedesktop.login1.reboot-ignore-inhibit",
1875                         NULL,
1876                         error);
1877 }
1878
1879 static int method_halt(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_HALT_TARGET,
1885                         INHIBIT_SHUTDOWN,
1886                         "org.freedesktop.login1.halt",
1887                         "org.freedesktop.login1.halt-multiple-sessions",
1888                         "org.freedesktop.login1.halt-ignore-inhibit",
1889                         NULL,
1890                         error);
1891 }
1892
1893 static int method_suspend(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_SUSPEND_TARGET,
1899                         INHIBIT_SLEEP,
1900                         "org.freedesktop.login1.suspend",
1901                         "org.freedesktop.login1.suspend-multiple-sessions",
1902                         "org.freedesktop.login1.suspend-ignore-inhibit",
1903                         "suspend",
1904                         error);
1905 }
1906
1907 static int method_hibernate(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_HIBERNATE_TARGET,
1913                         INHIBIT_SLEEP,
1914                         "org.freedesktop.login1.hibernate",
1915                         "org.freedesktop.login1.hibernate-multiple-sessions",
1916                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1917                         "hibernate",
1918                         error);
1919 }
1920
1921 static int method_hybrid_sleep(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_HYBRID_SLEEP_TARGET,
1927                         INHIBIT_SLEEP,
1928                         "org.freedesktop.login1.hibernate",
1929                         "org.freedesktop.login1.hibernate-multiple-sessions",
1930                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1931                         "hybrid-sleep",
1932                         error);
1933 }
1934
1935 static int method_suspend_then_hibernate(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_SUSPEND_THEN_HIBERNATE_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 nologin_timeout_handler(
1950                         sd_event_source *s,
1951                         uint64_t usec,
1952                         void *userdata) {
1953
1954         Manager *m = userdata;
1955
1956         log_info("Creating /run/nologin, blocking further logins...");
1957
1958         m->unlink_nologin =
1959                 create_shutdown_run_nologin_or_warn() >= 0;
1960
1961         return 0;
1962 }
1963
1964 static int update_schedule_file(Manager *m) {
1965         _cleanup_free_ char *temp_path = NULL;
1966         _cleanup_fclose_ FILE *f = NULL;
1967         int r;
1968
1969         assert(m);
1970
1971         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
1972         if (r < 0)
1973                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1974
1975         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1976         if (r < 0)
1977                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1978
1979         (void) fchmod(fileno(f), 0644);
1980
1981         fprintf(f,
1982                 "USEC="USEC_FMT"\n"
1983                 "WARN_WALL=%i\n"
1984                 "MODE=%s\n",
1985                 m->scheduled_shutdown_timeout,
1986                 m->enable_wall_messages,
1987                 m->scheduled_shutdown_type);
1988
1989         if (!isempty(m->wall_message)) {
1990                 _cleanup_free_ char *t;
1991
1992                 t = cescape(m->wall_message);
1993                 if (!t) {
1994                         r = -ENOMEM;
1995                         goto fail;
1996                 }
1997
1998                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1999         }
2000
2001         r = fflush_and_check(f);
2002         if (r < 0)
2003                 goto fail;
2004
2005         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2006                 r = -errno;
2007                 goto fail;
2008         }
2009
2010         return 0;
2011
2012 fail:
2013         (void) unlink(temp_path);
2014         (void) unlink("/run/systemd/shutdown/scheduled");
2015
2016         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2017 }
2018
2019 static void reset_scheduled_shutdown(Manager *m) {
2020         assert(m);
2021
2022         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2023         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
2024         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
2025
2026         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
2027         m->scheduled_shutdown_timeout = 0;
2028         m->shutdown_dry_run = false;
2029
2030         if (m->unlink_nologin) {
2031                 (void) unlink_or_warn("/run/nologin");
2032                 m->unlink_nologin = false;
2033         }
2034
2035         (void) unlink("/run/systemd/shutdown/scheduled");
2036 }
2037
2038 static int manager_scheduled_shutdown_handler(
2039                         sd_event_source *s,
2040                         uint64_t usec,
2041                         void *userdata) {
2042
2043         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2044         Manager *m = userdata;
2045         const char *target;
2046         int r;
2047
2048         assert(m);
2049
2050         if (isempty(m->scheduled_shutdown_type))
2051                 return 0;
2052
2053         if (streq(m->scheduled_shutdown_type, "poweroff"))
2054                 target = SPECIAL_POWEROFF_TARGET;
2055         else if (streq(m->scheduled_shutdown_type, "reboot"))
2056                 target = SPECIAL_REBOOT_TARGET;
2057         else if (streq(m->scheduled_shutdown_type, "halt"))
2058                 target = SPECIAL_HALT_TARGET;
2059         else
2060                 assert_not_reached("unexpected shutdown type");
2061
2062         /* Don't allow multiple jobs being executed at the same time */
2063         if (m->action_what) {
2064                 r = -EALREADY;
2065                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2066                 goto error;
2067         }
2068
2069         if (m->shutdown_dry_run) {
2070                 /* We do not process delay inhibitors here.  Otherwise, we
2071                  * would have to be considered "in progress" (like the check
2072                  * above) for some seconds after our admin has seen the final
2073                  * wall message. */
2074
2075                 bus_manager_log_shutdown(m, target);
2076                 log_info("Running in dry run, suppressing action.");
2077                 reset_scheduled_shutdown(m);
2078
2079                 return 0;
2080         }
2081
2082         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2083         if (r < 0) {
2084                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2085                 goto error;
2086         }
2087
2088         return 0;
2089
2090 error:
2091         reset_scheduled_shutdown(m);
2092         return r;
2093 }
2094
2095 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2096         Manager *m = userdata;
2097         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2098         const char *action_multiple_sessions = NULL;
2099         const char *action_ignore_inhibit = NULL;
2100         const char *action = NULL;
2101         uint64_t elapse;
2102         char *type;
2103         int r;
2104         bool dry_run = false;
2105
2106         assert(m);
2107         assert(message);
2108
2109         r = sd_bus_message_read(message, "st", &type, &elapse);
2110         if (r < 0)
2111                 return r;
2112
2113         if (startswith(type, "dry-")) {
2114                 type += 4;
2115                 dry_run = true;
2116         }
2117
2118         if (streq(type, "poweroff")) {
2119                 action = "org.freedesktop.login1.power-off";
2120                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2121                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2122         } else if (streq(type, "reboot")) {
2123                 action = "org.freedesktop.login1.reboot";
2124                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2125                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2126         } else if (streq(type, "halt")) {
2127                 action = "org.freedesktop.login1.halt";
2128                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2129                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2130         } else
2131                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2132
2133         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2134                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2135         if (r != 0)
2136                 return r;
2137
2138         if (m->scheduled_shutdown_timeout_source) {
2139                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2140                 if (r < 0)
2141                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2142
2143                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2144                 if (r < 0)
2145                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2146         } else {
2147                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2148                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2149                 if (r < 0)
2150                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2151         }
2152
2153         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2154         if (r < 0) {
2155                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2156                 return log_oom();
2157         }
2158
2159         m->shutdown_dry_run = dry_run;
2160
2161         if (m->nologin_timeout_source) {
2162                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2163                 if (r < 0)
2164                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2165
2166                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2167                 if (r < 0)
2168                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2169         } else {
2170                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2171                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2172                 if (r < 0)
2173                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2174         }
2175
2176         m->scheduled_shutdown_timeout = elapse;
2177
2178         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2179         if (r >= 0) {
2180                 const char *tty = NULL;
2181
2182                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2183                 (void) sd_bus_creds_get_tty(creds, &tty);
2184
2185                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2186                 if (r < 0) {
2187                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2188                         return log_oom();
2189                 }
2190         }
2191
2192         r = manager_setup_wall_message_timer(m);
2193         if (r < 0)
2194                 return r;
2195
2196         r = update_schedule_file(m);
2197         if (r < 0)
2198                 return r;
2199
2200         return sd_bus_reply_method_return(message, NULL);
2201 }
2202
2203 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2204         Manager *m = userdata;
2205         bool cancelled;
2206
2207         assert(m);
2208         assert(message);
2209
2210         cancelled = m->scheduled_shutdown_type != NULL;
2211         reset_scheduled_shutdown(m);
2212
2213         if (cancelled) {
2214                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2215                 const char *tty = NULL;
2216                 uid_t uid = 0;
2217                 int r;
2218
2219                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2220                 if (r >= 0) {
2221                         (void) sd_bus_creds_get_uid(creds, &uid);
2222                         (void) sd_bus_creds_get_tty(creds, &tty);
2223                 }
2224
2225                 utmp_wall("The system shutdown has been cancelled",
2226                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2227         }
2228
2229         return sd_bus_reply_method_return(message, "b", cancelled);
2230 }
2231
2232 static int method_can_shutdown_or_sleep(
2233                 Manager *m,
2234                 sd_bus_message *message,
2235                 InhibitWhat w,
2236                 const char *action,
2237                 const char *action_multiple_sessions,
2238                 const char *action_ignore_inhibit,
2239                 const char *sleep_verb,
2240                 sd_bus_error *error) {
2241
2242         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2243         HandleAction handle;
2244         bool multiple_sessions, challenge, blocked;
2245         const char *result = NULL;
2246         uid_t uid;
2247         int r;
2248
2249         assert(m);
2250         assert(message);
2251         assert(w >= 0);
2252         assert(w <= _INHIBIT_WHAT_MAX);
2253         assert(action);
2254         assert(action_multiple_sessions);
2255         assert(action_ignore_inhibit);
2256
2257         if (sleep_verb) {
2258                 r = can_sleep(sleep_verb);
2259                 if (IN_SET(r,  0, -ENOSPC))
2260                         return sd_bus_reply_method_return(message, "s", "na");
2261                 if (r < 0)
2262                         return r;
2263         }
2264
2265         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2266         if (r < 0)
2267                 return r;
2268
2269         r = sd_bus_creds_get_euid(creds, &uid);
2270         if (r < 0)
2271                 return r;
2272
2273         r = have_multiple_sessions(m, uid);
2274         if (r < 0)
2275                 return r;
2276
2277         multiple_sessions = r > 0;
2278         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2279
2280         handle = handle_action_from_string(sleep_verb);
2281         if (handle >= 0) {
2282                 const char *target;
2283
2284                 target = manager_target_for_action(handle);
2285                 if (target) {
2286                         _cleanup_free_ char *load_state = NULL;
2287
2288                         r = unit_load_state(m->bus, target, &load_state);
2289                         if (r < 0)
2290                                 return r;
2291
2292                         if (!streq(load_state, "loaded")) {
2293                                 result = "no";
2294                                 goto finish;
2295                         }
2296                 }
2297         }
2298
2299         if (multiple_sessions) {
2300                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2301                 if (r < 0)
2302                         return r;
2303
2304                 if (r > 0)
2305                         result = "yes";
2306                 else if (challenge)
2307                         result = "challenge";
2308                 else
2309                         result = "no";
2310         }
2311
2312         if (blocked) {
2313                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2314                 if (r < 0)
2315                         return r;
2316
2317                 if (r > 0 && !result)
2318                         result = "yes";
2319                 else if (challenge && (!result || streq(result, "yes")))
2320                         result = "challenge";
2321                 else
2322                         result = "no";
2323         }
2324
2325         if (!multiple_sessions && !blocked) {
2326                 /* If neither inhibit nor multiple sessions
2327                  * apply then just check the normal policy */
2328
2329                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2330                 if (r < 0)
2331                         return r;
2332
2333                 if (r > 0)
2334                         result = "yes";
2335                 else if (challenge)
2336                         result = "challenge";
2337                 else
2338                         result = "no";
2339         }
2340
2341  finish:
2342         return sd_bus_reply_method_return(message, "s", result);
2343 }
2344
2345 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2346         Manager *m = userdata;
2347
2348         return method_can_shutdown_or_sleep(
2349                         m, message,
2350                         INHIBIT_SHUTDOWN,
2351                         "org.freedesktop.login1.power-off",
2352                         "org.freedesktop.login1.power-off-multiple-sessions",
2353                         "org.freedesktop.login1.power-off-ignore-inhibit",
2354                         NULL,
2355                         error);
2356 }
2357
2358 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2359         Manager *m = userdata;
2360
2361         return method_can_shutdown_or_sleep(
2362                         m, message,
2363                         INHIBIT_SHUTDOWN,
2364                         "org.freedesktop.login1.reboot",
2365                         "org.freedesktop.login1.reboot-multiple-sessions",
2366                         "org.freedesktop.login1.reboot-ignore-inhibit",
2367                         NULL,
2368                         error);
2369 }
2370
2371 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2372         Manager *m = userdata;
2373
2374         return method_can_shutdown_or_sleep(
2375                         m, message,
2376                         INHIBIT_SHUTDOWN,
2377                         "org.freedesktop.login1.halt",
2378                         "org.freedesktop.login1.halt-multiple-sessions",
2379                         "org.freedesktop.login1.halt-ignore-inhibit",
2380                         NULL,
2381                         error);
2382 }
2383
2384 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2385         Manager *m = userdata;
2386
2387         return method_can_shutdown_or_sleep(
2388                         m, message,
2389                         INHIBIT_SLEEP,
2390                         "org.freedesktop.login1.suspend",
2391                         "org.freedesktop.login1.suspend-multiple-sessions",
2392                         "org.freedesktop.login1.suspend-ignore-inhibit",
2393                         "suspend",
2394                         error);
2395 }
2396
2397 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2398         Manager *m = userdata;
2399
2400         return method_can_shutdown_or_sleep(
2401                         m, message,
2402                         INHIBIT_SLEEP,
2403                         "org.freedesktop.login1.hibernate",
2404                         "org.freedesktop.login1.hibernate-multiple-sessions",
2405                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2406                         "hibernate",
2407                         error);
2408 }
2409
2410 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2411         Manager *m = userdata;
2412
2413         return method_can_shutdown_or_sleep(
2414                         m, message,
2415                         INHIBIT_SLEEP,
2416                         "org.freedesktop.login1.hibernate",
2417                         "org.freedesktop.login1.hibernate-multiple-sessions",
2418                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2419                         "hybrid-sleep",
2420                         error);
2421 }
2422
2423 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2424         Manager *m = userdata;
2425
2426         return method_can_shutdown_or_sleep(
2427                         m, message,
2428                         INHIBIT_SLEEP,
2429                         "org.freedesktop.login1.hibernate",
2430                         "org.freedesktop.login1.hibernate-multiple-sessions",
2431                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2432                         "suspend-then-hibernate",
2433                         error);
2434 }
2435
2436 static int property_get_reboot_to_firmware_setup(
2437                 sd_bus *bus,
2438                 const char *path,
2439                 const char *interface,
2440                 const char *property,
2441                 sd_bus_message *reply,
2442                 void *userdata,
2443                 sd_bus_error *error) {
2444         int r;
2445
2446         assert(bus);
2447         assert(reply);
2448         assert(userdata);
2449
2450         r = efi_get_reboot_to_firmware();
2451         if (r < 0 && r != -EOPNOTSUPP)
2452                 log_warning_errno(r, "Failed to determine reboot-to-firmware state: %m");
2453
2454         return sd_bus_message_append(reply, "b", r > 0);
2455 }
2456
2457 static int method_set_reboot_to_firmware_setup(
2458                 sd_bus_message *message,
2459                 void *userdata,
2460                 sd_bus_error *error) {
2461
2462         int b, r;
2463         Manager *m = userdata;
2464
2465         assert(message);
2466         assert(m);
2467
2468         r = sd_bus_message_read(message, "b", &b);
2469         if (r < 0)
2470                 return r;
2471
2472         r = bus_verify_polkit_async(message,
2473                                     CAP_SYS_ADMIN,
2474                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2475                                     NULL,
2476                                     false,
2477                                     UID_INVALID,
2478                                     &m->polkit_registry,
2479                                     error);
2480         if (r < 0)
2481                 return r;
2482         if (r == 0)
2483                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2484
2485         r = efi_set_reboot_to_firmware(b);
2486         if (r < 0)
2487                 return r;
2488
2489         return sd_bus_reply_method_return(message, NULL);
2490 }
2491
2492 static int method_can_reboot_to_firmware_setup(
2493                 sd_bus_message *message,
2494                 void *userdata,
2495                 sd_bus_error *error) {
2496
2497         int r;
2498         bool challenge;
2499         const char *result;
2500         Manager *m = userdata;
2501
2502         assert(message);
2503         assert(m);
2504
2505         r = efi_reboot_to_firmware_supported();
2506         if (r < 0) {
2507                 if (r != -EOPNOTSUPP)
2508                         log_warning_errno(errno, "Failed to determine whether reboot to firmware is supported: %m");
2509
2510                 return sd_bus_reply_method_return(message, "s", "na");
2511         }
2512
2513         r = bus_test_polkit(message,
2514                             CAP_SYS_ADMIN,
2515                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2516                             NULL,
2517                             UID_INVALID,
2518                             &challenge,
2519                             error);
2520         if (r < 0)
2521                 return r;
2522
2523         if (r > 0)
2524                 result = "yes";
2525         else if (challenge)
2526                 result = "challenge";
2527         else
2528                 result = "no";
2529
2530         return sd_bus_reply_method_return(message, "s", result);
2531 }
2532
2533 static int method_set_wall_message(
2534                 sd_bus_message *message,
2535                 void *userdata,
2536                 sd_bus_error *error) {
2537
2538         int r;
2539         Manager *m = userdata;
2540         char *wall_message;
2541         int enable_wall_messages;
2542
2543         assert(message);
2544         assert(m);
2545
2546         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2547         if (r < 0)
2548                 return r;
2549
2550         r = bus_verify_polkit_async(message,
2551                                     CAP_SYS_ADMIN,
2552                                     "org.freedesktop.login1.set-wall-message",
2553                                     NULL,
2554                                     false,
2555                                     UID_INVALID,
2556                                     &m->polkit_registry,
2557                                     error);
2558         if (r < 0)
2559                 return r;
2560         if (r == 0)
2561                 return 1; /* Will call us back */
2562
2563         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2564         if (r < 0)
2565                 return log_oom();
2566
2567         m->enable_wall_messages = enable_wall_messages;
2568
2569         return sd_bus_reply_method_return(message, NULL);
2570 }
2571
2572 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2573         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2574         const char *who, *why, *what, *mode;
2575         _cleanup_free_ char *id = NULL;
2576         _cleanup_close_ int fifo_fd = -1;
2577         Manager *m = userdata;
2578         Inhibitor *i = NULL;
2579         InhibitMode mm;
2580         InhibitWhat w;
2581         pid_t pid;
2582         uid_t uid;
2583         int r;
2584
2585         assert(message);
2586         assert(m);
2587
2588         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2589         if (r < 0)
2590                 return r;
2591
2592         w = inhibit_what_from_string(what);
2593         if (w <= 0)
2594                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2595
2596         mm = inhibit_mode_from_string(mode);
2597         if (mm < 0)
2598                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2599
2600         /* Delay is only supported for shutdown/sleep */
2601         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2602                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2603
2604         /* Don't allow taking delay locks while we are already
2605          * executing the operation. We shouldn't create the impression
2606          * that the lock was successful if the machine is about to go
2607          * down/suspend any moment. */
2608         if (m->action_what & w)
2609                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2610
2611         r = bus_verify_polkit_async(
2612                         message,
2613                         CAP_SYS_BOOT,
2614                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2615                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2616                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2617                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2618                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2619                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2620                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2621                         NULL,
2622                         false,
2623                         UID_INVALID,
2624                         &m->polkit_registry,
2625                         error);
2626         if (r < 0)
2627                 return r;
2628         if (r == 0)
2629                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2630
2631         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2632         if (r < 0)
2633                 return r;
2634
2635         r = sd_bus_creds_get_euid(creds, &uid);
2636         if (r < 0)
2637                 return r;
2638
2639         r = sd_bus_creds_get_pid(creds, &pid);
2640         if (r < 0)
2641                 return r;
2642
2643         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2644                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2645
2646         do {
2647                 id = mfree(id);
2648
2649                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2650                         return -ENOMEM;
2651
2652         } while (hashmap_get(m->inhibitors, id));
2653
2654         r = manager_add_inhibitor(m, id, &i);
2655         if (r < 0)
2656                 return r;
2657
2658         i->what = w;
2659         i->mode = mm;
2660         i->pid = pid;
2661         i->uid = uid;
2662         i->why = strdup(why);
2663         i->who = strdup(who);
2664
2665         if (!i->why || !i->who) {
2666                 r = -ENOMEM;
2667                 goto fail;
2668         }
2669
2670         fifo_fd = inhibitor_create_fifo(i);
2671         if (fifo_fd < 0) {
2672                 r = fifo_fd;
2673                 goto fail;
2674         }
2675
2676         inhibitor_start(i);
2677
2678         return sd_bus_reply_method_return(message, "h", fifo_fd);
2679
2680 fail:
2681         if (i)
2682                 inhibitor_free(i);
2683
2684         return r;
2685 }
2686
2687 const sd_bus_vtable manager_vtable[] = {
2688         SD_BUS_VTABLE_START(0),
2689
2690         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2691         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2692
2693         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2694         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2695         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2696         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2697         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2698         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2699         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2700         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2701         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2702         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2703         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2704         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2705         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2706         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2707         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2708         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
2709         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2710         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2711         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2712         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2713         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2714         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2715         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2716         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2717         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2718         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2719         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2720         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2721         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2722         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2723         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2724
2725         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2726         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2727         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2728         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2729         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2730         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2731         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2732         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2733         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2734         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2735         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2736         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2737         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2738         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2739         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2740         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2741         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2742         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2743         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2744         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2745         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2746         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2747         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2748         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2749         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2750         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2751         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2752         SD_BUS_METHOD("Halt", "b", NULL, method_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2753         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2754         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2755         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2756         SD_BUS_METHOD("SuspendThenHibernate", "b", NULL, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2757         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2758         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2759         SD_BUS_METHOD("CanHalt", NULL, "s", method_can_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2760         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2761         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2762         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2763         SD_BUS_METHOD("CanSuspendThenHibernate", NULL, "s", method_can_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2764         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2765         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2766         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2767         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2768         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2769         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2770
2771         SD_BUS_SIGNAL("SessionNew", "so", 0),
2772         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2773         SD_BUS_SIGNAL("UserNew", "uo", 0),
2774         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2775         SD_BUS_SIGNAL("SeatNew", "so", 0),
2776         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2777         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2778         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2779
2780         SD_BUS_VTABLE_END
2781 };
2782
2783 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2784         int r = 0;
2785
2786         assert(s);
2787         assert(unit);
2788
2789         if (!s->started)
2790                 return r;
2791
2792         if (streq(result, "done"))
2793                 r = session_send_create_reply(s, NULL);
2794         else {
2795                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2796
2797                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2798                 r = session_send_create_reply(s, &e);
2799         }
2800
2801         return r;
2802 }
2803
2804 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2805         const char *path, *result, *unit;
2806         Manager *m = userdata;
2807         Session *session;
2808         uint32_t id;
2809         User *user;
2810         int r;
2811
2812         assert(message);
2813         assert(m);
2814
2815         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2816         if (r < 0) {
2817                 bus_log_parse_error(r);
2818                 return 0;
2819         }
2820
2821         if (m->action_job && streq(m->action_job, path)) {
2822                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2823
2824                 /* Tell people that they now may take a lock again */
2825                 (void) send_prepare_for(m, m->action_what, false);
2826
2827                 m->action_job = mfree(m->action_job);
2828                 m->action_unit = NULL;
2829                 m->action_what = 0;
2830                 return 0;
2831         }
2832
2833         session = hashmap_get(m->session_units, unit);
2834         if (session && streq_ptr(path, session->scope_job)) {
2835                 session->scope_job = mfree(session->scope_job);
2836                 session_jobs_reply(session, unit, result);
2837
2838                 session_save(session);
2839                 user_save(session->user);
2840                 session_add_to_gc_queue(session);
2841         }
2842
2843         user = hashmap_get(m->user_units, unit);
2844         if (user &&
2845             (streq_ptr(path, user->service_job) ||
2846              streq_ptr(path, user->slice_job))) {
2847
2848                 if (streq_ptr(path, user->service_job))
2849                         user->service_job = mfree(user->service_job);
2850
2851                 if (streq_ptr(path, user->slice_job))
2852                         user->slice_job = mfree(user->slice_job);
2853
2854                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2855                         session_jobs_reply(session, unit, result);
2856
2857                 user_save(user);
2858                 user_add_to_gc_queue(user);
2859         }
2860
2861         return 0;
2862 }
2863
2864 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2865         const char *path, *unit;
2866         Manager *m = userdata;
2867         Session *session;
2868         User *user;
2869         int r;
2870
2871         assert(message);
2872         assert(m);
2873
2874         r = sd_bus_message_read(message, "so", &unit, &path);
2875         if (r < 0) {
2876                 bus_log_parse_error(r);
2877                 return 0;
2878         }
2879
2880         session = hashmap_get(m->session_units, unit);
2881         if (session)
2882                 session_add_to_gc_queue(session);
2883
2884         user = hashmap_get(m->user_units, unit);
2885         if (user)
2886                 user_add_to_gc_queue(user);
2887
2888         return 0;
2889 }
2890
2891 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2892         _cleanup_free_ char *unit = NULL;
2893         Manager *m = userdata;
2894         const char *path;
2895         Session *session;
2896         User *user;
2897         int r;
2898
2899         assert(message);
2900         assert(m);
2901
2902         path = sd_bus_message_get_path(message);
2903         if (!path)
2904                 return 0;
2905
2906         r = unit_name_from_dbus_path(path, &unit);
2907         if (r == -EINVAL) /* not a unit */
2908                 return 0;
2909         if (r < 0) {
2910                 log_oom();
2911                 return 0;
2912         }
2913
2914         session = hashmap_get(m->session_units, unit);
2915         if (session)
2916                 session_add_to_gc_queue(session);
2917
2918         user = hashmap_get(m->user_units, unit);
2919         if (user)
2920                 user_add_to_gc_queue(user);
2921
2922         return 0;
2923 }
2924
2925 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2926         Manager *m = userdata;
2927         Session *session;
2928         Iterator i;
2929         int b, r;
2930
2931         assert(message);
2932         assert(m);
2933
2934         r = sd_bus_message_read(message, "b", &b);
2935         if (r < 0) {
2936                 bus_log_parse_error(r);
2937                 return 0;
2938         }
2939
2940         if (b)
2941                 return 0;
2942
2943         /* systemd finished reloading, let's recheck all our sessions */
2944         log_debug("System manager has been reloaded, rechecking sessions...");
2945
2946         HASHMAP_FOREACH(session, m->sessions, i)
2947                 session_add_to_gc_queue(session);
2948
2949         return 0;
2950 }
2951
2952 int manager_send_changed(Manager *manager, const char *property, ...) {
2953         char **l;
2954
2955         assert(manager);
2956
2957         l = strv_from_stdarg_alloca(property);
2958
2959         return sd_bus_emit_properties_changed_strv(
2960                         manager->bus,
2961                         "/org/freedesktop/login1",
2962                         "org.freedesktop.login1.Manager",
2963                         l);
2964 }
2965
2966 static int strdup_job(sd_bus_message *reply, char **job) {
2967         const char *j;
2968         char *copy;
2969         int r;
2970
2971         r = sd_bus_message_read(reply, "o", &j);
2972         if (r < 0)
2973                 return r;
2974
2975         copy = strdup(j);
2976         if (!copy)
2977                 return -ENOMEM;
2978
2979         *job = copy;
2980         return 1;
2981 }
2982
2983 int manager_start_slice(
2984                 Manager *manager,
2985                 const char *slice,
2986                 const char *description,
2987                 const char *after,
2988                 const char *after2,
2989                 uint64_t tasks_max,
2990                 sd_bus_error *error,
2991                 char **job) {
2992
2993         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2994         int r;
2995
2996         assert(manager);
2997         assert(slice);
2998         assert(job);
2999
3000         r = sd_bus_message_new_method_call(
3001                         manager->bus,
3002                         &m,
3003                         "org.freedesktop.systemd1",
3004                         "/org/freedesktop/systemd1",
3005                         "org.freedesktop.systemd1.Manager",
3006                         "StartTransientUnit");
3007         if (r < 0)
3008                 return r;
3009
3010         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
3011         if (r < 0)
3012                 return r;
3013
3014         r = sd_bus_message_open_container(m, 'a', "(sv)");
3015         if (r < 0)
3016                 return r;
3017
3018         if (!isempty(description)) {
3019                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3020                 if (r < 0)
3021                         return r;
3022         }
3023
3024         if (!isempty(after)) {
3025                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3026                 if (r < 0)
3027                         return r;
3028         }
3029
3030         if (!isempty(after2)) {
3031                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3032                 if (r < 0)
3033                         return r;
3034         }
3035
3036         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3037         if (r < 0)
3038                 return r;
3039
3040         r = sd_bus_message_close_container(m);
3041         if (r < 0)
3042                 return r;
3043
3044         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3045         if (r < 0)
3046                 return r;
3047
3048         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3049         if (r < 0)
3050                 return r;
3051
3052         return strdup_job(reply, job);
3053 }
3054
3055 int manager_start_scope(
3056                 Manager *manager,
3057                 const char *scope,
3058                 pid_t pid,
3059                 const char *slice,
3060                 const char *description,
3061                 const char *after,
3062                 const char *after2,
3063                 sd_bus_message *more_properties,
3064                 sd_bus_error *error,
3065                 char **job) {
3066
3067         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3068         int r;
3069
3070         assert(manager);
3071         assert(scope);
3072         assert(pid > 1);
3073         assert(job);
3074
3075         r = sd_bus_message_new_method_call(
3076                         manager->bus,
3077                         &m,
3078                         "org.freedesktop.systemd1",
3079                         "/org/freedesktop/systemd1",
3080                         "org.freedesktop.systemd1.Manager",
3081                         "StartTransientUnit");
3082         if (r < 0)
3083                 return r;
3084
3085         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3086         if (r < 0)
3087                 return r;
3088
3089         r = sd_bus_message_open_container(m, 'a', "(sv)");
3090         if (r < 0)
3091                 return r;
3092
3093         if (!isempty(slice)) {
3094                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3095                 if (r < 0)
3096                         return r;
3097         }
3098
3099         if (!isempty(description)) {
3100                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3101                 if (r < 0)
3102                         return r;
3103         }
3104
3105         if (!isempty(after)) {
3106                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3107                 if (r < 0)
3108                         return r;
3109         }
3110
3111         if (!isempty(after2)) {
3112                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3113                 if (r < 0)
3114                         return r;
3115         }
3116
3117         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
3118          * SIGTERM */
3119         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3120         if (r < 0)
3121                 return r;
3122
3123         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3124         if (r < 0)
3125                 return r;
3126
3127         /* disable TasksMax= for the session scope, rely on the slice setting for it */
3128         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
3129         if (r < 0)
3130                 return bus_log_create_error(r);
3131
3132         if (more_properties) {
3133                 /* If TasksMax also appears here, it will overwrite the default value set above */
3134                 r = sd_bus_message_copy(m, more_properties, true);
3135                 if (r < 0)
3136                         return r;
3137         }
3138
3139         r = sd_bus_message_close_container(m);
3140         if (r < 0)
3141                 return r;
3142
3143         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3144         if (r < 0)
3145                 return r;
3146
3147         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3148         if (r < 0)
3149                 return r;
3150
3151         return strdup_job(reply, job);
3152 }
3153
3154 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3155         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3156         int r;
3157
3158         assert(manager);
3159         assert(unit);
3160         assert(job);
3161
3162         r = sd_bus_call_method(
3163                         manager->bus,
3164                         "org.freedesktop.systemd1",
3165                         "/org/freedesktop/systemd1",
3166                         "org.freedesktop.systemd1.Manager",
3167                         "StartUnit",
3168                         error,
3169                         &reply,
3170                         "ss", unit, "replace");
3171         if (r < 0)
3172                 return r;
3173
3174         return strdup_job(reply, job);
3175 }
3176
3177 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3178         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3179         int r;
3180
3181         assert(manager);
3182         assert(unit);
3183         assert(job);
3184
3185         r = sd_bus_call_method(
3186                         manager->bus,
3187                         "org.freedesktop.systemd1",
3188                         "/org/freedesktop/systemd1",
3189                         "org.freedesktop.systemd1.Manager",
3190                         "StopUnit",
3191                         error,
3192                         &reply,
3193                         "ss", unit, "fail");
3194         if (r < 0) {
3195                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3196                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3197
3198                         *job = NULL;
3199                         sd_bus_error_free(error);
3200                         return 0;
3201                 }
3202
3203                 return r;
3204         }
3205
3206         return strdup_job(reply, job);
3207 }
3208
3209 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3210         _cleanup_free_ char *path = NULL;
3211         int r;
3212
3213         assert(manager);
3214         assert(scope);
3215
3216         path = unit_dbus_path_from_name(scope);
3217         if (!path)
3218                 return -ENOMEM;
3219
3220         r = sd_bus_call_method(
3221                         manager->bus,
3222                         "org.freedesktop.systemd1",
3223                         path,
3224                         "org.freedesktop.systemd1.Scope",
3225                         "Abandon",
3226                         error,
3227                         NULL,
3228                         NULL);
3229         if (r < 0) {
3230                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3231                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3232                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3233                         sd_bus_error_free(error);
3234                         return 0;
3235                 }
3236
3237                 return r;
3238         }
3239
3240         return 1;
3241 }
3242
3243 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3244         assert(manager);
3245         assert(unit);
3246
3247         return sd_bus_call_method(
3248                         manager->bus,
3249                         "org.freedesktop.systemd1",
3250                         "/org/freedesktop/systemd1",
3251                         "org.freedesktop.systemd1.Manager",
3252                         "KillUnit",
3253                         error,
3254                         NULL,
3255                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3256 }
3257
3258 int manager_unit_is_active(Manager *manager, const char *unit) {
3259         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3260         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3261         _cleanup_free_ char *path = NULL;
3262         const char *state;
3263         int r;
3264
3265         assert(manager);
3266         assert(unit);
3267
3268         path = unit_dbus_path_from_name(unit);
3269         if (!path)
3270                 return -ENOMEM;
3271
3272         r = sd_bus_get_property(
3273                         manager->bus,
3274                         "org.freedesktop.systemd1",
3275                         path,
3276                         "org.freedesktop.systemd1.Unit",
3277                         "ActiveState",
3278                         &error,
3279                         &reply,
3280                         "s");
3281         if (r < 0) {
3282                 /* systemd might have droppped off momentarily, let's
3283                  * not make this an error */
3284                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3285                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3286                         return true;
3287
3288                 /* If the unit is already unloaded then it's not
3289                  * active */
3290                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3291                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3292                         return false;
3293
3294                 return r;
3295         }
3296
3297         r = sd_bus_message_read(reply, "s", &state);
3298         if (r < 0)
3299                 return -EINVAL;
3300
3301         return !streq(state, "inactive") && !streq(state, "failed");
3302 }
3303
3304 int manager_job_is_active(Manager *manager, const char *path) {
3305         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3306         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3307         int r;
3308
3309         assert(manager);
3310         assert(path);
3311
3312         r = sd_bus_get_property(
3313                         manager->bus,
3314                         "org.freedesktop.systemd1",
3315                         path,
3316                         "org.freedesktop.systemd1.Job",
3317                         "State",
3318                         &error,
3319                         &reply,
3320                         "s");
3321         if (r < 0) {
3322                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3323                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3324                         return true;
3325
3326                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3327                         return false;
3328
3329                 return r;
3330         }
3331
3332         /* We don't actually care about the state really. The fact
3333          * that we could read the job state is enough for us */
3334
3335         return true;
3336 }