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 static BUS_DEFINE_PROPERTY_GET(property_get_docked, "b", Manager, manager_is_docked_or_external_displays);
 281 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_compat_user_tasks_max, "t", CGROUP_LIMIT_MAX);
 282 static BUS_DEFINE_PROPERTY_GET_REF(property_get_hashmap_size, "t", Hashmap *, (uint64_t) hashmap_size);
 283
 284 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 285         _cleanup_free_ char *p = NULL;
 286         Manager *m = userdata;
 287         const char *name;
 288         Session *session;
 289         int r;
 290
 291         assert(message);
 292         assert(m);
 293
 294         r = sd_bus_message_read(message, "s", &name);
 295         if (r < 0)
 296                 return r;
 297
 298         r = manager_get_session_from_creds(m, message, name, error, &session);
 299         if (r < 0)
 300                 return r;
 301
 302         p = session_bus_path(session);
 303         if (!p)
 304                 return -ENOMEM;
 305
 306         return sd_bus_reply_method_return(message, "o", p);
 307 }
 308
 309 /* Get login session of a process.  This is not what you are looking for these days,
 310  * as apps may instead belong to a user service unit.  This includes terminal
 311  * emulators and hence command-line apps. */
 312 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 313         _cleanup_free_ char *p = NULL;
 314         Session *session = NULL;
 315         Manager *m = userdata;
 316         pid_t pid;
 317         int r;
 318
 319         assert(message);
 320         assert(m);
 321
 322         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 323
 324         r = sd_bus_message_read(message, "u", &pid);
 325         if (r < 0)
 326                 return r;
 327         if (pid < 0)
 328                 return -EINVAL;
 329
 330         if (pid == 0) {
 331                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 332                 if (r < 0)
 333                         return r;
 334         } else {
 335                 r = manager_get_session_by_pid(m, pid, &session);
 336                 if (r < 0)
 337                         return r;
 338
 339                 if (!session)
 340                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 341         }
 342
 343         p = session_bus_path(session);
 344         if (!p)
 345                 return -ENOMEM;
 346
 347         return sd_bus_reply_method_return(message, "o", p);
 348 }
 349
 350 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 351         _cleanup_free_ char *p = NULL;
 352         Manager *m = userdata;
 353         uint32_t uid;
 354         User *user;
 355         int r;
 356
 357         assert(message);
 358         assert(m);
 359
 360         r = sd_bus_message_read(message, "u", &uid);
 361         if (r < 0)
 362                 return r;
 363
 364         r = manager_get_user_from_creds(m, message, uid, error, &user);
 365         if (r < 0)
 366                 return r;
 367
 368         p = user_bus_path(user);
 369         if (!p)
 370                 return -ENOMEM;
 371
 372         return sd_bus_reply_method_return(message, "o", p);
 373 }
 374
 375 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 376         _cleanup_free_ char *p = NULL;
 377         Manager *m = userdata;
 378         User *user = NULL;
 379         pid_t pid;
 380         int r;
 381
 382         assert(message);
 383         assert(m);
 384
 385         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 386
 387         r = sd_bus_message_read(message, "u", &pid);
 388         if (r < 0)
 389                 return r;
 390         if (pid < 0)
 391                 return -EINVAL;
 392
 393         if (pid == 0) {
 394                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 395                 if (r < 0)
 396                         return r;
 397         } else {
 398                 r = manager_get_user_by_pid(m, pid, &user);
 399                 if (r < 0)
 400                         return r;
 401                 if (!user)
 402                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 403                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 404                                                  pid);
 405         }
 406
 407         p = user_bus_path(user);
 408         if (!p)
 409                 return -ENOMEM;
 410
 411         return sd_bus_reply_method_return(message, "o", p);
 412 }
 413
 414 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 415         _cleanup_free_ char *p = NULL;
 416         Manager *m = userdata;
 417         const char *name;
 418         Seat *seat;
 419         int r;
 420
 421         assert(message);
 422         assert(m);
 423
 424         r = sd_bus_message_read(message, "s", &name);
 425         if (r < 0)
 426                 return r;
 427
 428         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 429         if (r < 0)
 430                 return r;
 431
 432         p = seat_bus_path(seat);
 433         if (!p)
 434                 return -ENOMEM;
 435
 436         return sd_bus_reply_method_return(message, "o", p);
 437 }
 438
 439 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 440         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 441         Manager *m = userdata;
 442         Session *session;
 443         Iterator i;
 444         int r;
 445
 446         assert(message);
 447         assert(m);
 448
 449         r = sd_bus_message_new_method_return(message, &reply);
 450         if (r < 0)
 451                 return r;
 452
 453         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 454         if (r < 0)
 455                 return r;
 456
 457         HASHMAP_FOREACH(session, m->sessions, i) {
 458                 _cleanup_free_ char *p = NULL;
 459
 460                 p = session_bus_path(session);
 461                 if (!p)
 462                         return -ENOMEM;
 463
 464                 r = sd_bus_message_append(reply, "(susso)",
 465                                           session->id,
 466                                           (uint32_t) session->user->uid,
 467                                           session->user->name,
 468                                           session->seat ? session->seat->id : "",
 469                                           p);
 470                 if (r < 0)
 471                         return r;
 472         }
 473
 474         r = sd_bus_message_close_container(reply);
 475         if (r < 0)
 476                 return r;
 477
 478         return sd_bus_send(NULL, reply, NULL);
 479 }
 480
 481 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 482         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 483         Manager *m = userdata;
 484         User *user;
 485         Iterator i;
 486         int r;
 487
 488         assert(message);
 489         assert(m);
 490
 491         r = sd_bus_message_new_method_return(message, &reply);
 492         if (r < 0)
 493                 return r;
 494
 495         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 496         if (r < 0)
 497                 return r;
 498
 499         HASHMAP_FOREACH(user, m->users, i) {
 500                 _cleanup_free_ char *p = NULL;
 501
 502                 p = user_bus_path(user);
 503                 if (!p)
 504                         return -ENOMEM;
 505
 506                 r = sd_bus_message_append(reply, "(uso)",
 507                                           (uint32_t) user->uid,
 508                                           user->name,
 509                                           p);
 510                 if (r < 0)
 511                         return r;
 512         }
 513
 514         r = sd_bus_message_close_container(reply);
 515         if (r < 0)
 516                 return r;
 517
 518         return sd_bus_send(NULL, reply, NULL);
 519 }
 520
 521 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 522         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 523         Manager *m = userdata;
 524         Seat *seat;
 525         Iterator i;
 526         int r;
 527
 528         assert(message);
 529         assert(m);
 530
 531         r = sd_bus_message_new_method_return(message, &reply);
 532         if (r < 0)
 533                 return r;
 534
 535         r = sd_bus_message_open_container(reply, 'a', "(so)");
 536         if (r < 0)
 537                 return r;
 538
 539         HASHMAP_FOREACH(seat, m->seats, i) {
 540                 _cleanup_free_ char *p = NULL;
 541
 542                 p = seat_bus_path(seat);
 543                 if (!p)
 544                         return -ENOMEM;
 545
 546                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 547                 if (r < 0)
 548                         return r;
 549         }
 550
 551         r = sd_bus_message_close_container(reply);
 552         if (r < 0)
 553                 return r;
 554
 555         return sd_bus_send(NULL, reply, NULL);
 556 }
 557
 558 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 559         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 560         Manager *m = userdata;
 561         Inhibitor *inhibitor;
 562         Iterator i;
 563         int r;
 564
 565         assert(message);
 566         assert(m);
 567
 568         r = sd_bus_message_new_method_return(message, &reply);
 569         if (r < 0)
 570                 return r;
 571
 572         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 573         if (r < 0)
 574                 return r;
 575
 576         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 577
 578                 r = sd_bus_message_append(reply, "(ssssuu)",
 579                                           strempty(inhibit_what_to_string(inhibitor->what)),
 580                                           strempty(inhibitor->who),
 581                                           strempty(inhibitor->why),
 582                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 583                                           (uint32_t) inhibitor->uid,
 584                                           (uint32_t) inhibitor->pid);
 585                 if (r < 0)
 586                         return r;
 587         }
 588
 589         r = sd_bus_message_close_container(reply);
 590         if (r < 0)
 591                 return r;
 592
 593         return sd_bus_send(NULL, reply, NULL);
 594 }
 595
 596 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 597         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 598         _cleanup_free_ char *id = NULL;
 599         Session *session = NULL;
 600         uint32_t audit_id = 0;
 601         Manager *m = userdata;
 602         User *user = NULL;
 603         Seat *seat = NULL;
 604         pid_t leader;
 605         uid_t uid;
 606         int remote;
 607         uint32_t vtnr = 0;
 608         SessionType t;
 609         SessionClass c;
 610         int r;
 611
 612         assert(message);
 613         assert(m);
 614
 615         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 616         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 617
 618         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 619         if (r < 0)
 620                 return r;
 621
 622         if (!uid_is_valid(uid))
 623                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 624         if (leader < 0 || leader == 1 || leader == getpid_cached())
 625                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 626
 627         if (isempty(type))
 628                 t = _SESSION_TYPE_INVALID;
 629         else {
 630                 t = session_type_from_string(type);
 631                 if (t < 0)
 632                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 633         }
 634
 635         if (isempty(class))
 636                 c = _SESSION_CLASS_INVALID;
 637         else {
 638                 c = session_class_from_string(class);
 639                 if (c < 0)
 640                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 641         }
 642
 643         if (isempty(desktop))
 644                 desktop = NULL;
 645         else {
 646                 if (!string_is_safe(desktop))
 647                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 648         }
 649
 650         if (isempty(cseat))
 651                 seat = NULL;
 652         else {
 653                 seat = hashmap_get(m->seats, cseat);
 654                 if (!seat)
 655                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 656         }
 657
 658         if (tty_is_vc(tty)) {
 659                 int v;
 660
 661                 if (!seat)
 662                         seat = m->seat0;
 663                 else if (seat != m->seat0)
 664                         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);
 665
 666                 v = vtnr_from_tty(tty);
 667                 if (v <= 0)
 668                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 669
 670                 if (vtnr == 0)
 671                         vtnr = (uint32_t) v;
 672                 else if (vtnr != (uint32_t) v)
 673                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 674
 675         } else if (tty_is_console(tty)) {
 676
 677                 if (!seat)
 678                         seat = m->seat0;
 679                 else if (seat != m->seat0)
 680                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 681
 682                 if (vtnr != 0)
 683                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 684         }
 685
 686         if (seat) {
 687                 if (seat_has_vts(seat)) {
 688                         if (vtnr <= 0 || vtnr > 63)
 689                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 690                 } else {
 691                         if (vtnr != 0)
 692                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 693                 }
 694         }
 695
 696         if (t == _SESSION_TYPE_INVALID) {
 697                 if (!isempty(display))
 698                         t = SESSION_X11;
 699                 else if (!isempty(tty))
 700                         t = SESSION_TTY;
 701                 else
 702                         t = SESSION_UNSPECIFIED;
 703         }
 704
 705         if (c == _SESSION_CLASS_INVALID) {
 706                 if (t == SESSION_UNSPECIFIED)
 707                         c = SESSION_BACKGROUND;
 708                 else
 709                         c = SESSION_USER;
 710         }
 711
 712         if (leader == 0) {
 713                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 714
 715                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 716                 if (r < 0)
 717                         return r;
 718
 719                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 720                 if (r < 0)
 721                         return r;
 722         }
 723
 724         /* Check if we are already in a logind session. Or if we are in user@.service which is a special PAM session
 725          * that avoids creating a logind session. */
 726         r = manager_get_user_by_pid(m, leader, NULL);
 727         if (r < 0)
 728                 return r;
 729         if (r > 0)
 730                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session or user slice");
 731
 732         /*
 733          * Old gdm and lightdm start the user-session on the same VT as
 734          * the greeter session. But they destroy the greeter session
 735          * after the user-session and want the user-session to take
 736          * over the VT. We need to support this for
 737          * backwards-compatibility, so make sure we allow new sessions
 738          * on a VT that a greeter is running on. Furthermore, to allow
 739          * re-logins, we have to allow a greeter to take over a used VT for
 740          * the exact same reasons.
 741          */
 742         if (c != SESSION_GREETER &&
 743             vtnr > 0 &&
 744             vtnr < m->seat0->position_count &&
 745             m->seat0->positions[vtnr] &&
 746             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 747                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 748
 749         if (hashmap_size(m->sessions) >= m->sessions_max)
 750                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 751
 752         (void) audit_session_from_pid(leader, &audit_id);
 753         if (audit_session_is_valid(audit_id)) {
 754                 /* Keep our session IDs and the audit session IDs in sync */
 755
 756                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 757                         return -ENOMEM;
 758
 759                 /* Wut? There's already a session by this name and we
 760                  * didn't find it above? Weird, then let's not trust
 761                  * the audit data and let's better register a new
 762                  * ID */
 763                 if (hashmap_get(m->sessions, id)) {
 764                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 765                         audit_id = AUDIT_SESSION_INVALID;
 766                         id = mfree(id);
 767                 }
 768         }
 769
 770         if (!id) {
 771                 do {
 772                         id = mfree(id);
 773
 774                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 775                                 return -ENOMEM;
 776
 777                 } while (hashmap_get(m->sessions, id));
 778         }
 779
 780         r = manager_add_user_by_uid(m, uid, &user);
 781         if (r < 0)
 782                 goto fail;
 783
 784         r = manager_add_session(m, id, &session);
 785         if (r < 0)
 786                 goto fail;
 787
 788         session_set_user(session, user);
 789
 790         session->leader = leader;
 791         session->audit_id = audit_id;
 792         session->type = t;
 793         session->class = c;
 794         session->remote = remote;
 795         session->vtnr = vtnr;
 796
 797         if (!isempty(tty)) {
 798                 session->tty = strdup(tty);
 799                 if (!session->tty) {
 800                         r = -ENOMEM;
 801                         goto fail;
 802                 }
 803         }
 804
 805         if (!isempty(display)) {
 806                 session->display = strdup(display);
 807                 if (!session->display) {
 808                         r = -ENOMEM;
 809                         goto fail;
 810                 }
 811         }
 812
 813         if (!isempty(remote_user)) {
 814                 session->remote_user = strdup(remote_user);
 815                 if (!session->remote_user) {
 816                         r = -ENOMEM;
 817                         goto fail;
 818                 }
 819         }
 820
 821         if (!isempty(remote_host)) {
 822                 session->remote_host = strdup(remote_host);
 823                 if (!session->remote_host) {
 824                         r = -ENOMEM;
 825                         goto fail;
 826                 }
 827         }
 828
 829         if (!isempty(service)) {
 830                 session->service = strdup(service);
 831                 if (!session->service) {
 832                         r = -ENOMEM;
 833                         goto fail;
 834                 }
 835         }
 836
 837         if (!isempty(desktop)) {
 838                 session->desktop = strdup(desktop);
 839                 if (!session->desktop) {
 840                         r = -ENOMEM;
 841                         goto fail;
 842                 }
 843         }
 844
 845         if (seat) {
 846                 r = seat_attach_session(seat, session);
 847                 if (r < 0)
 848                         goto fail;
 849         }
 850
 851         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 852         if (r < 0)
 853                 return r;
 854
 855         r = session_start(session, message);
 856         if (r < 0)
 857                 goto fail;
 858
 859         r = sd_bus_message_exit_container(message);
 860         if (r < 0)
 861                 goto fail;
 862
 863         session->create_message = sd_bus_message_ref(message);
 864
 865         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 866          * session_send_create_reply(). */
 867
 868         return 1;
 869
 870 fail:
 871         if (session)
 872                 session_add_to_gc_queue(session);
 873
 874         if (user)
 875                 user_add_to_gc_queue(user);
 876
 877         return r;
 878 }
 879
 880 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 881         Manager *m = userdata;
 882         Session *session;
 883         const char *name;
 884         int r;
 885
 886         assert(message);
 887         assert(m);
 888
 889         r = sd_bus_message_read(message, "s", &name);
 890         if (r < 0)
 891                 return r;
 892
 893         r = manager_get_session_from_creds(m, message, name, error, &session);
 894         if (r < 0)
 895                 return r;
 896
 897         r = session_release(session);
 898         if (r < 0)
 899                 return r;
 900
 901         return sd_bus_reply_method_return(message, NULL);
 902 }
 903
 904 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 905         Manager *m = userdata;
 906         Session *session;
 907         const char *name;
 908         int r;
 909
 910         assert(message);
 911         assert(m);
 912
 913         r = sd_bus_message_read(message, "s", &name);
 914         if (r < 0)
 915                 return r;
 916
 917         r = manager_get_session_from_creds(m, message, name, error, &session);
 918         if (r < 0)
 919                 return r;
 920
 921         return bus_session_method_activate(message, session, error);
 922 }
 923
 924 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 925         const char *session_name, *seat_name;
 926         Manager *m = userdata;
 927         Session *session;
 928         Seat *seat;
 929         int r;
 930
 931         assert(message);
 932         assert(m);
 933
 934         /* Same as ActivateSession() but refuses to work if
 935          * the seat doesn't match */
 936
 937         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 938         if (r < 0)
 939                 return r;
 940
 941         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 942         if (r < 0)
 943                 return r;
 944
 945         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 946         if (r < 0)
 947                 return r;
 948
 949         if (session->seat != seat)
 950                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 951
 952         r = session_activate(session);
 953         if (r < 0)
 954                 return r;
 955
 956         return sd_bus_reply_method_return(message, NULL);
 957 }
 958
 959 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 960         Manager *m = userdata;
 961         Session *session;
 962         const char *name;
 963         int r;
 964
 965         assert(message);
 966         assert(m);
 967
 968         r = sd_bus_message_read(message, "s", &name);
 969         if (r < 0)
 970                 return r;
 971
 972         r = manager_get_session_from_creds(m, message, name, error, &session);
 973         if (r < 0)
 974                 return r;
 975
 976         return bus_session_method_lock(message, session, error);
 977 }
 978
 979 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 980         Manager *m = userdata;
 981         int r;
 982
 983         assert(message);
 984         assert(m);
 985
 986         r = bus_verify_polkit_async(
 987                         message,
 988                         CAP_SYS_ADMIN,
 989                         "org.freedesktop.login1.lock-sessions",
 990                         NULL,
 991                         false,
 992                         UID_INVALID,
 993                         &m->polkit_registry,
 994                         error);
 995         if (r < 0)
 996                 return r;
 997         if (r == 0)
 998                 return 1; /* Will call us back */
 999
1000         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1001         if (r < 0)
1002                 return r;
1003
1004         return sd_bus_reply_method_return(message, NULL);
1005 }
1006
1007 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1008         const char *name;
1009         Manager *m = userdata;
1010         Session *session;
1011         int r;
1012
1013         assert(message);
1014         assert(m);
1015
1016         r = sd_bus_message_read(message, "s", &name);
1017         if (r < 0)
1018                 return r;
1019
1020         r = manager_get_session_from_creds(m, message, name, error, &session);
1021         if (r < 0)
1022                 return r;
1023
1024         return bus_session_method_kill(message, session, error);
1025 }
1026
1027 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1028         Manager *m = userdata;
1029         uint32_t uid;
1030         User *user;
1031         int r;
1032
1033         assert(message);
1034         assert(m);
1035
1036         r = sd_bus_message_read(message, "u", &uid);
1037         if (r < 0)
1038                 return r;
1039
1040         r = manager_get_user_from_creds(m, message, uid, error, &user);
1041         if (r < 0)
1042                 return r;
1043
1044         return bus_user_method_kill(message, user, error);
1045 }
1046
1047 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1048         Manager *m = userdata;
1049         const char *name;
1050         Session *session;
1051         int r;
1052
1053         assert(message);
1054         assert(m);
1055
1056         r = sd_bus_message_read(message, "s", &name);
1057         if (r < 0)
1058                 return r;
1059
1060         r = manager_get_session_from_creds(m, message, name, error, &session);
1061         if (r < 0)
1062                 return r;
1063
1064         return bus_session_method_terminate(message, session, error);
1065 }
1066
1067 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1068         Manager *m = userdata;
1069         uint32_t uid;
1070         User *user;
1071         int r;
1072
1073         assert(message);
1074         assert(m);
1075
1076         r = sd_bus_message_read(message, "u", &uid);
1077         if (r < 0)
1078                 return r;
1079
1080         r = manager_get_user_from_creds(m, message, uid, error, &user);
1081         if (r < 0)
1082                 return r;
1083
1084         return bus_user_method_terminate(message, user, error);
1085 }
1086
1087 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1088         Manager *m = userdata;
1089         const char *name;
1090         Seat *seat;
1091         int r;
1092
1093         assert(message);
1094         assert(m);
1095
1096         r = sd_bus_message_read(message, "s", &name);
1097         if (r < 0)
1098                 return r;
1099
1100         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1101         if (r < 0)
1102                 return r;
1103
1104         return bus_seat_method_terminate(message, seat, error);
1105 }
1106
1107 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1108         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1109         _cleanup_free_ char *cc = NULL;
1110         Manager *m = userdata;
1111         int r, b, interactive;
1112         struct passwd *pw;
1113         const char *path;
1114         uint32_t uid, auth_uid;
1115
1116         assert(message);
1117         assert(m);
1118
1119         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1120         if (r < 0)
1121                 return r;
1122
1123         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1124                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1125         if (r < 0)
1126                 return r;
1127
1128         if (!uid_is_valid(uid)) {
1129                 /* Note that we get the owner UID of the session or user unit,
1130                  * not the actual client UID here! */
1131                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1132                 if (r < 0)
1133                         return r;
1134         }
1135
1136         /* owner_uid is racy, so for authorization we must use euid */
1137         r = sd_bus_creds_get_euid(creds, &auth_uid);
1138         if (r < 0)
1139                 return r;
1140
1141         errno = 0;
1142         pw = getpwuid(uid);
1143         if (!pw)
1144                 return errno > 0 ? -errno : -ENOENT;
1145
1146         r = bus_verify_polkit_async(
1147                         message,
1148                         CAP_SYS_ADMIN,
1149                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1150                                           "org.freedesktop.login1.set-user-linger",
1151                         NULL,
1152                         interactive,
1153                         UID_INVALID,
1154                         &m->polkit_registry,
1155                         error);
1156         if (r < 0)
1157                 return r;
1158         if (r == 0)
1159                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1160
1161         mkdir_p_label("/var/lib/systemd", 0755);
1162
1163         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1164         if (r < 0)
1165                 return r;
1166
1167         cc = cescape(pw->pw_name);
1168         if (!cc)
1169                 return -ENOMEM;
1170
1171         path = strjoina("/var/lib/systemd/linger/", cc);
1172         if (b) {
1173                 User *u;
1174
1175                 r = touch(path);
1176                 if (r < 0)
1177                         return r;
1178
1179                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1180                         user_start(u);
1181
1182         } else {
1183                 User *u;
1184
1185                 r = unlink(path);
1186                 if (r < 0 && errno != ENOENT)
1187                         return -errno;
1188
1189                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1190                 if (u)
1191                         user_add_to_gc_queue(u);
1192         }
1193
1194         return sd_bus_reply_method_return(message, NULL);
1195 }
1196
1197 static int trigger_device(Manager *m, struct udev_device *d) {
1198         _cleanup_(udev_enumerate_unrefp) struct udev_enumerate *e = NULL;
1199         struct udev_list_entry *first, *item;
1200         int r;
1201
1202         assert(m);
1203
1204         e = udev_enumerate_new(m->udev);
1205         if (!e)
1206                 return -ENOMEM;
1207
1208         if (d) {
1209                 r = udev_enumerate_add_match_parent(e, d);
1210                 if (r < 0)
1211                         return r;
1212         }
1213
1214         r = udev_enumerate_scan_devices(e);
1215         if (r < 0)
1216                 return r;
1217
1218         first = udev_enumerate_get_list_entry(e);
1219         udev_list_entry_foreach(item, first) {
1220                 _cleanup_free_ char *t = NULL;
1221                 const char *p;
1222
1223                 p = udev_list_entry_get_name(item);
1224
1225                 t = strappend(p, "/uevent");
1226                 if (!t)
1227                         return -ENOMEM;
1228
1229                 (void) write_string_file(t, "change", 0);
1230         }
1231
1232         return 0;
1233 }
1234
1235 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1236         _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
1237         _cleanup_free_ char *rule = NULL, *file = NULL;
1238         const char *id_for_seat;
1239         int r;
1240
1241         assert(m);
1242         assert(seat);
1243         assert(sysfs);
1244
1245         d = udev_device_new_from_syspath(m->udev, sysfs);
1246         if (!d)
1247                 return -ENODEV;
1248
1249         if (!udev_device_has_tag(d, "seat"))
1250                 return -ENODEV;
1251
1252         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1253         if (!id_for_seat)
1254                 return -ENODEV;
1255
1256         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1257                 return -ENOMEM;
1258
1259         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1260                 return -ENOMEM;
1261
1262         mkdir_p_label("/etc/udev/rules.d", 0755);
1263         r = write_string_file_atomic_label(file, rule);
1264         if (r < 0)
1265                 return r;
1266
1267         return trigger_device(m, d);
1268 }
1269
1270 static int flush_devices(Manager *m) {
1271         _cleanup_closedir_ DIR *d;
1272
1273         assert(m);
1274
1275         d = opendir("/etc/udev/rules.d");
1276         if (!d) {
1277                 if (errno != ENOENT)
1278                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1279         } else {
1280                 struct dirent *de;
1281
1282                 FOREACH_DIRENT_ALL(de, d, break) {
1283                         if (!dirent_is_file(de))
1284                                 continue;
1285
1286                         if (!startswith(de->d_name, "72-seat-"))
1287                                 continue;
1288
1289                         if (!endswith(de->d_name, ".rules"))
1290                                 continue;
1291
1292                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1293                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1294                 }
1295         }
1296
1297         return trigger_device(m, NULL);
1298 }
1299
1300 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1301         const char *sysfs, *seat;
1302         Manager *m = userdata;
1303         int interactive, r;
1304
1305         assert(message);
1306         assert(m);
1307
1308         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1309         if (r < 0)
1310                 return r;
1311
1312         if (!path_startswith(sysfs, "/sys"))
1313                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1314
1315         if (!seat_name_is_valid(seat))
1316                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1317
1318         r = bus_verify_polkit_async(
1319                         message,
1320                         CAP_SYS_ADMIN,
1321                         "org.freedesktop.login1.attach-device",
1322                         NULL,
1323                         interactive,
1324                         UID_INVALID,
1325                         &m->polkit_registry,
1326                         error);
1327         if (r < 0)
1328                 return r;
1329         if (r == 0)
1330                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1331
1332         r = attach_device(m, seat, sysfs);
1333         if (r < 0)
1334                 return r;
1335
1336         return sd_bus_reply_method_return(message, NULL);
1337 }
1338
1339 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1340         Manager *m = userdata;
1341         int interactive, r;
1342
1343         assert(message);
1344         assert(m);
1345
1346         r = sd_bus_message_read(message, "b", &interactive);
1347         if (r < 0)
1348                 return r;
1349
1350         r = bus_verify_polkit_async(
1351                         message,
1352                         CAP_SYS_ADMIN,
1353                         "org.freedesktop.login1.flush-devices",
1354                         NULL,
1355                         interactive,
1356                         UID_INVALID,
1357                         &m->polkit_registry,
1358                         error);
1359         if (r < 0)
1360                 return r;
1361         if (r == 0)
1362                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1363
1364         r = flush_devices(m);
1365         if (r < 0)
1366                 return r;
1367
1368         return sd_bus_reply_method_return(message, NULL);
1369 }
1370
1371 static int have_multiple_sessions(
1372                 Manager *m,
1373                 uid_t uid) {
1374
1375         Session *session;
1376         Iterator i;
1377
1378         assert(m);
1379
1380         /* Check for other users' sessions. Greeter sessions do not
1381          * count, and non-login sessions do not count either. */
1382         HASHMAP_FOREACH(session, m->sessions, i)
1383                 if (session->class == SESSION_USER &&
1384                     session->user->uid != uid)
1385                         return true;
1386
1387         return false;
1388 }
1389
1390 static int bus_manager_log_shutdown(
1391                 Manager *m,
1392                 const char *unit_name) {
1393
1394         const char *p, *q;
1395
1396         assert(m);
1397         assert(unit_name);
1398
1399         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1400                 p = "MESSAGE=System is powering down";
1401                 q = "SHUTDOWN=power-off";
1402         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1403                 p = "MESSAGE=System is rebooting";
1404                 q = "SHUTDOWN=reboot";
1405         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1406                 p = "MESSAGE=System is halting";
1407                 q = "SHUTDOWN=halt";
1408         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1409                 p = "MESSAGE=System is rebooting with kexec";
1410                 q = "SHUTDOWN=kexec";
1411         } else {
1412                 p = "MESSAGE=System is shutting down";
1413                 q = NULL;
1414         }
1415
1416         if (isempty(m->wall_message))
1417                 p = strjoina(p, ".");
1418         else
1419                 p = strjoina(p, " (", m->wall_message, ").");
1420
1421         return log_struct(LOG_NOTICE,
1422                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1423                           p,
1424                           q,
1425                           NULL);
1426 }
1427
1428 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1429         Manager *m = userdata;
1430
1431         assert(e);
1432         assert(m);
1433
1434         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1435         return 0;
1436 }
1437
1438 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1439         int r;
1440
1441         assert(m);
1442
1443         if (until <= now(CLOCK_MONOTONIC))
1444                 return 0;
1445
1446         /* We want to ignore the lid switch for a while after each
1447          * suspend, and after boot-up. Hence let's install a timer for
1448          * this. As long as the event source exists we ignore the lid
1449          * switch. */
1450
1451         if (m->lid_switch_ignore_event_source) {
1452                 usec_t u;
1453
1454                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1455                 if (r < 0)
1456                         return r;
1457
1458                 if (until <= u)
1459                         return 0;
1460
1461                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1462         } else
1463                 r = sd_event_add_time(
1464                                 m->event,
1465                                 &m->lid_switch_ignore_event_source,
1466                                 CLOCK_MONOTONIC,
1467                                 until, 0,
1468                                 lid_switch_ignore_handler, m);
1469
1470         return r;
1471 }
1472
1473 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1474
1475         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1476                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1477                 [INHIBIT_SLEEP] = "PrepareForSleep"
1478         };
1479
1480         int active = _active;
1481
1482         assert(m);
1483         assert(w >= 0);
1484         assert(w < _INHIBIT_WHAT_MAX);
1485         assert(signal_name[w]);
1486
1487         return sd_bus_emit_signal(m->bus,
1488                                   "/org/freedesktop/login1",
1489                                   "org.freedesktop.login1.Manager",
1490                                   signal_name[w],
1491                                   "b",
1492                                   active);
1493 }
1494
1495 static int execute_shutdown_or_sleep(
1496                 Manager *m,
1497                 InhibitWhat w,
1498                 const char *unit_name,
1499                 sd_bus_error *error) {
1500
1501         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1502         char *c = NULL;
1503         const char *p;
1504         int r;
1505
1506         assert(m);
1507         assert(w > 0);
1508         assert(w < _INHIBIT_WHAT_MAX);
1509         assert(unit_name);
1510
1511         if (w == INHIBIT_SHUTDOWN)
1512                 bus_manager_log_shutdown(m, unit_name);
1513
1514         r = sd_bus_call_method(
1515                         m->bus,
1516                         "org.freedesktop.systemd1",
1517                         "/org/freedesktop/systemd1",
1518                         "org.freedesktop.systemd1.Manager",
1519                         "StartUnit",
1520                         error,
1521                         &reply,
1522                         "ss", unit_name, "replace-irreversibly");
1523         if (r < 0)
1524                 goto error;
1525
1526         r = sd_bus_message_read(reply, "o", &p);
1527         if (r < 0)
1528                 goto error;
1529
1530         c = strdup(p);
1531         if (!c) {
1532                 r = -ENOMEM;
1533                 goto error;
1534         }
1535
1536         m->action_unit = unit_name;
1537         free(m->action_job);
1538         m->action_job = c;
1539         m->action_what = w;
1540
1541         /* Make sure the lid switch is ignored for a while */
1542         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1543
1544         return 0;
1545
1546 error:
1547         /* Tell people that they now may take a lock again */
1548         (void) send_prepare_for(m, w, false);
1549
1550         return r;
1551 }
1552
1553 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1554
1555         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1556         Inhibitor *offending = NULL;
1557         int r;
1558
1559         assert(manager);
1560
1561         if (manager->action_what == 0 || manager->action_job)
1562                 return 0;
1563
1564         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1565                 _cleanup_free_ char *comm = NULL, *u = NULL;
1566
1567                 if (!timeout)
1568                         return 0;
1569
1570                 (void) get_process_comm(offending->pid, &comm);
1571                 u = uid_to_name(offending->uid);
1572
1573                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1574                            offending->uid, strna(u),
1575                            offending->pid, strna(comm));
1576         }
1577
1578         /* Actually do the operation */
1579         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1580         if (r < 0) {
1581                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1582                             bus_error_message(&error, r));
1583
1584                 manager->action_unit = NULL;
1585                 manager->action_what = 0;
1586                 return r;
1587         }
1588
1589         return 1;
1590 }
1591
1592 static int manager_inhibit_timeout_handler(
1593                         sd_event_source *s,
1594                         uint64_t usec,
1595                         void *userdata) {
1596
1597         Manager *manager = userdata;
1598         int r;
1599
1600         assert(manager);
1601         assert(manager->inhibit_timeout_source == s);
1602
1603         r = manager_dispatch_delayed(manager, true);
1604         return (r < 0) ? r : 0;
1605 }
1606
1607 static int delay_shutdown_or_sleep(
1608                 Manager *m,
1609                 InhibitWhat w,
1610                 const char *unit_name) {
1611
1612         int r;
1613         usec_t timeout_val;
1614
1615         assert(m);
1616         assert(w >= 0);
1617         assert(w < _INHIBIT_WHAT_MAX);
1618         assert(unit_name);
1619
1620         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1621
1622         if (m->inhibit_timeout_source) {
1623                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1624                 if (r < 0)
1625                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1626
1627                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1628                 if (r < 0)
1629                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1630         } else {
1631                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1632                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1633                 if (r < 0)
1634                         return r;
1635         }
1636
1637         m->action_unit = unit_name;
1638         m->action_what = w;
1639
1640         return 0;
1641 }
1642
1643 int bus_manager_shutdown_or_sleep_now_or_later(
1644                 Manager *m,
1645                 const char *unit_name,
1646                 InhibitWhat w,
1647                 sd_bus_error *error) {
1648
1649         _cleanup_free_ char *load_state = NULL;
1650         bool delayed;
1651         int r;
1652
1653         assert(m);
1654         assert(unit_name);
1655         assert(w > 0);
1656         assert(w <= _INHIBIT_WHAT_MAX);
1657         assert(!m->action_job);
1658
1659         r = unit_load_state(m->bus, unit_name, &load_state);
1660         if (r < 0)
1661                 return r;
1662
1663         if (!streq(load_state, "loaded")) {
1664                 log_notice("Unit %s is %s, refusing operation.", unit_name, load_state);
1665                 return -EACCES;
1666         }
1667
1668         /* Tell everybody to prepare for shutdown/sleep */
1669         (void) send_prepare_for(m, w, true);
1670
1671         delayed =
1672                 m->inhibit_delay_max > 0 &&
1673                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1674
1675         if (delayed)
1676                 /* Shutdown is delayed, keep in mind what we
1677                  * want to do, and start a timeout */
1678                 r = delay_shutdown_or_sleep(m, w, unit_name);
1679         else
1680                 /* Shutdown is not delayed, execute it
1681                  * immediately */
1682                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1683
1684         return r;
1685 }
1686
1687 static int verify_shutdown_creds(
1688                 Manager *m,
1689                 sd_bus_message *message,
1690                 InhibitWhat w,
1691                 bool interactive,
1692                 const char *action,
1693                 const char *action_multiple_sessions,
1694                 const char *action_ignore_inhibit,
1695                 sd_bus_error *error) {
1696
1697         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1698         bool multiple_sessions, blocked;
1699         uid_t uid;
1700         int r;
1701
1702         assert(m);
1703         assert(message);
1704         assert(w >= 0);
1705         assert(w <= _INHIBIT_WHAT_MAX);
1706
1707         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1708         if (r < 0)
1709                 return r;
1710
1711         r = sd_bus_creds_get_euid(creds, &uid);
1712         if (r < 0)
1713                 return r;
1714
1715         r = have_multiple_sessions(m, uid);
1716         if (r < 0)
1717                 return r;
1718
1719         multiple_sessions = r > 0;
1720         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1721
1722         if (multiple_sessions && action_multiple_sessions) {
1723                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1724                 if (r < 0)
1725                         return r;
1726                 if (r == 0)
1727                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1728         }
1729
1730         if (blocked && action_ignore_inhibit) {
1731                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1732                 if (r < 0)
1733                         return r;
1734                 if (r == 0)
1735                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1736         }
1737
1738         if (!multiple_sessions && !blocked && action) {
1739                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1740                 if (r < 0)
1741                         return r;
1742                 if (r == 0)
1743                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1744         }
1745
1746         return 0;
1747 }
1748
1749 static int method_do_shutdown_or_sleep(
1750                 Manager *m,
1751                 sd_bus_message *message,
1752                 const char *unit_name,
1753                 InhibitWhat w,
1754                 const char *action,
1755                 const char *action_multiple_sessions,
1756                 const char *action_ignore_inhibit,
1757                 const char *sleep_verb,
1758                 sd_bus_error *error) {
1759
1760         int interactive, r;
1761
1762         assert(m);
1763         assert(message);
1764         assert(unit_name);
1765         assert(w >= 0);
1766         assert(w <= _INHIBIT_WHAT_MAX);
1767
1768         r = sd_bus_message_read(message, "b", &interactive);
1769         if (r < 0)
1770                 return r;
1771
1772         /* Don't allow multiple jobs being executed at the same time */
1773         if (m->action_what)
1774                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1775
1776         if (sleep_verb) {
1777                 r = can_sleep(sleep_verb);
1778                 if (r == -ENOSPC)
1779                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1780                                                 "Not enough swap space for hibernation");
1781                 if (r == 0)
1782                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1783                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1784                 if (r < 0)
1785                         return r;
1786         }
1787
1788         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1789                                   action_ignore_inhibit, error);
1790         if (r != 0)
1791                 return r;
1792
1793         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1794         if (r < 0)
1795                 return r;
1796
1797         return sd_bus_reply_method_return(message, NULL);
1798 }
1799
1800 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1801         Manager *m = userdata;
1802
1803         return method_do_shutdown_or_sleep(
1804                         m, message,
1805                         SPECIAL_POWEROFF_TARGET,
1806                         INHIBIT_SHUTDOWN,
1807                         "org.freedesktop.login1.power-off",
1808                         "org.freedesktop.login1.power-off-multiple-sessions",
1809                         "org.freedesktop.login1.power-off-ignore-inhibit",
1810                         NULL,
1811                         error);
1812 }
1813
1814 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1815         Manager *m = userdata;
1816
1817         return method_do_shutdown_or_sleep(
1818                         m, message,
1819                         SPECIAL_REBOOT_TARGET,
1820                         INHIBIT_SHUTDOWN,
1821                         "org.freedesktop.login1.reboot",
1822                         "org.freedesktop.login1.reboot-multiple-sessions",
1823                         "org.freedesktop.login1.reboot-ignore-inhibit",
1824                         NULL,
1825                         error);
1826 }
1827
1828 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1829         Manager *m = userdata;
1830
1831         return method_do_shutdown_or_sleep(
1832                         m, message,
1833                         SPECIAL_HALT_TARGET,
1834                         INHIBIT_SHUTDOWN,
1835                         "org.freedesktop.login1.halt",
1836                         "org.freedesktop.login1.halt-multiple-sessions",
1837                         "org.freedesktop.login1.halt-ignore-inhibit",
1838                         NULL,
1839                         error);
1840 }
1841
1842 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1843         Manager *m = userdata;
1844
1845         return method_do_shutdown_or_sleep(
1846                         m, message,
1847                         SPECIAL_SUSPEND_TARGET,
1848                         INHIBIT_SLEEP,
1849                         "org.freedesktop.login1.suspend",
1850                         "org.freedesktop.login1.suspend-multiple-sessions",
1851                         "org.freedesktop.login1.suspend-ignore-inhibit",
1852                         "suspend",
1853                         error);
1854 }
1855
1856 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1857         Manager *m = userdata;
1858
1859         return method_do_shutdown_or_sleep(
1860                         m, message,
1861                         SPECIAL_HIBERNATE_TARGET,
1862                         INHIBIT_SLEEP,
1863                         "org.freedesktop.login1.hibernate",
1864                         "org.freedesktop.login1.hibernate-multiple-sessions",
1865                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1866                         "hibernate",
1867                         error);
1868 }
1869
1870 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1871         Manager *m = userdata;
1872
1873         return method_do_shutdown_or_sleep(
1874                         m, message,
1875                         SPECIAL_HYBRID_SLEEP_TARGET,
1876                         INHIBIT_SLEEP,
1877                         "org.freedesktop.login1.hibernate",
1878                         "org.freedesktop.login1.hibernate-multiple-sessions",
1879                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1880                         "hybrid-sleep",
1881                         error);
1882 }
1883
1884 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1885         Manager *m = userdata;
1886
1887         return method_do_shutdown_or_sleep(
1888                         m, message,
1889                         SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
1890                         INHIBIT_SLEEP,
1891                         "org.freedesktop.login1.hibernate",
1892                         "org.freedesktop.login1.hibernate-multiple-sessions",
1893                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1894                         "hybrid-sleep",
1895                         error);
1896 }
1897
1898 static int nologin_timeout_handler(
1899                         sd_event_source *s,
1900                         uint64_t usec,
1901                         void *userdata) {
1902
1903         Manager *m = userdata;
1904
1905         log_info("Creating /run/nologin, blocking further logins...");
1906
1907         m->unlink_nologin =
1908                 create_shutdown_run_nologin_or_warn() >= 0;
1909
1910         return 0;
1911 }
1912
1913 static int update_schedule_file(Manager *m) {
1914         _cleanup_free_ char *temp_path = NULL;
1915         _cleanup_fclose_ FILE *f = NULL;
1916         int r;
1917
1918         assert(m);
1919
1920         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
1921         if (r < 0)
1922                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1923
1924         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1925         if (r < 0)
1926                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1927
1928         (void) fchmod(fileno(f), 0644);
1929
1930         fprintf(f,
1931                 "USEC="USEC_FMT"\n"
1932                 "WARN_WALL=%i\n"
1933                 "MODE=%s\n",
1934                 m->scheduled_shutdown_timeout,
1935                 m->enable_wall_messages,
1936                 m->scheduled_shutdown_type);
1937
1938         if (!isempty(m->wall_message)) {
1939                 _cleanup_free_ char *t;
1940
1941                 t = cescape(m->wall_message);
1942                 if (!t) {
1943                         r = -ENOMEM;
1944                         goto fail;
1945                 }
1946
1947                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1948         }
1949
1950         r = fflush_and_check(f);
1951         if (r < 0)
1952                 goto fail;
1953
1954         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1955                 r = -errno;
1956                 goto fail;
1957         }
1958
1959         return 0;
1960
1961 fail:
1962         (void) unlink(temp_path);
1963         (void) unlink("/run/systemd/shutdown/scheduled");
1964
1965         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
1966 }
1967
1968 static void reset_scheduled_shutdown(Manager *m) {
1969         assert(m);
1970
1971         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1972         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1973         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1974
1975         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1976         m->scheduled_shutdown_timeout = 0;
1977         m->shutdown_dry_run = false;
1978
1979         if (m->unlink_nologin) {
1980                 (void) unlink_or_warn("/run/nologin");
1981                 m->unlink_nologin = false;
1982         }
1983
1984         (void) unlink("/run/systemd/shutdown/scheduled");
1985 }
1986
1987 static int manager_scheduled_shutdown_handler(
1988                         sd_event_source *s,
1989                         uint64_t usec,
1990                         void *userdata) {
1991
1992         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1993         Manager *m = userdata;
1994         const char *target;
1995         int r;
1996
1997         assert(m);
1998
1999         if (isempty(m->scheduled_shutdown_type))
2000                 return 0;
2001
2002         if (streq(m->scheduled_shutdown_type, "poweroff"))
2003                 target = SPECIAL_POWEROFF_TARGET;
2004         else if (streq(m->scheduled_shutdown_type, "reboot"))
2005                 target = SPECIAL_REBOOT_TARGET;
2006         else if (streq(m->scheduled_shutdown_type, "halt"))
2007                 target = SPECIAL_HALT_TARGET;
2008         else
2009                 assert_not_reached("unexpected shutdown type");
2010
2011         /* Don't allow multiple jobs being executed at the same time */
2012         if (m->action_what) {
2013                 r = -EALREADY;
2014                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2015                 goto error;
2016         }
2017
2018         if (m->shutdown_dry_run) {
2019                 /* We do not process delay inhibitors here.  Otherwise, we
2020                  * would have to be considered "in progress" (like the check
2021                  * above) for some seconds after our admin has seen the final
2022                  * wall message. */
2023
2024                 bus_manager_log_shutdown(m, target);
2025                 log_info("Running in dry run, suppressing action.");
2026                 reset_scheduled_shutdown(m);
2027
2028                 return 0;
2029         }
2030
2031         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2032         if (r < 0) {
2033                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2034                 goto error;
2035         }
2036
2037         return 0;
2038
2039 error:
2040         reset_scheduled_shutdown(m);
2041         return r;
2042 }
2043
2044 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2045         Manager *m = userdata;
2046         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2047         const char *action_multiple_sessions = NULL;
2048         const char *action_ignore_inhibit = NULL;
2049         const char *action = NULL;
2050         uint64_t elapse;
2051         char *type;
2052         int r;
2053         bool dry_run = false;
2054
2055         assert(m);
2056         assert(message);
2057
2058         r = sd_bus_message_read(message, "st", &type, &elapse);
2059         if (r < 0)
2060                 return r;
2061
2062         if (startswith(type, "dry-")) {
2063                 type += 4;
2064                 dry_run = true;
2065         }
2066
2067         if (streq(type, "poweroff")) {
2068                 action = "org.freedesktop.login1.power-off";
2069                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2070                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2071         } else if (streq(type, "reboot")) {
2072                 action = "org.freedesktop.login1.reboot";
2073                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2074                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2075         } else if (streq(type, "halt")) {
2076                 action = "org.freedesktop.login1.halt";
2077                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2078                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2079         } else
2080                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2081
2082         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2083                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2084         if (r != 0)
2085                 return r;
2086
2087         if (m->scheduled_shutdown_timeout_source) {
2088                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2089                 if (r < 0)
2090                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2091
2092                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2093                 if (r < 0)
2094                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2095         } else {
2096                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2097                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2098                 if (r < 0)
2099                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2100         }
2101
2102         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2103         if (r < 0) {
2104                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2105                 return log_oom();
2106         }
2107
2108         m->shutdown_dry_run = dry_run;
2109
2110         if (m->nologin_timeout_source) {
2111                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2112                 if (r < 0)
2113                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2114
2115                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2116                 if (r < 0)
2117                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2118         } else {
2119                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2120                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2121                 if (r < 0)
2122                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2123         }
2124
2125         m->scheduled_shutdown_timeout = elapse;
2126
2127         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2128         if (r >= 0) {
2129                 const char *tty = NULL;
2130
2131                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2132                 (void) sd_bus_creds_get_tty(creds, &tty);
2133
2134                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2135                 if (r < 0) {
2136                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2137                         return log_oom();
2138                 }
2139         }
2140
2141         r = manager_setup_wall_message_timer(m);
2142         if (r < 0)
2143                 return r;
2144
2145         r = update_schedule_file(m);
2146         if (r < 0)
2147                 return r;
2148
2149         return sd_bus_reply_method_return(message, NULL);
2150 }
2151
2152 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2153         Manager *m = userdata;
2154         bool cancelled;
2155
2156         assert(m);
2157         assert(message);
2158
2159         cancelled = m->scheduled_shutdown_type != NULL;
2160         reset_scheduled_shutdown(m);
2161
2162         if (cancelled && m->enable_wall_messages) {
2163                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2164                 const char *tty = NULL;
2165                 uid_t uid = 0;
2166                 int r;
2167
2168                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2169                 if (r >= 0) {
2170                         (void) sd_bus_creds_get_uid(creds, &uid);
2171                         (void) sd_bus_creds_get_tty(creds, &tty);
2172                 }
2173
2174                 utmp_wall("The system shutdown has been cancelled",
2175                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2176         }
2177
2178         return sd_bus_reply_method_return(message, "b", cancelled);
2179 }
2180
2181 static int method_can_shutdown_or_sleep(
2182                 Manager *m,
2183                 sd_bus_message *message,
2184                 InhibitWhat w,
2185                 const char *action,
2186                 const char *action_multiple_sessions,
2187                 const char *action_ignore_inhibit,
2188                 const char *sleep_verb,
2189                 sd_bus_error *error) {
2190
2191         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2192         HandleAction handle;
2193         bool multiple_sessions, challenge, blocked;
2194         const char *result = NULL;
2195         uid_t uid;
2196         int r;
2197
2198         assert(m);
2199         assert(message);
2200         assert(w >= 0);
2201         assert(w <= _INHIBIT_WHAT_MAX);
2202         assert(action);
2203         assert(action_multiple_sessions);
2204         assert(action_ignore_inhibit);
2205
2206         if (sleep_verb) {
2207                 r = can_sleep(sleep_verb);
2208                 if (IN_SET(r,  0, -ENOSPC))
2209                         return sd_bus_reply_method_return(message, "s", "na");
2210                 if (r < 0)
2211                         return r;
2212         }
2213
2214         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2215         if (r < 0)
2216                 return r;
2217
2218         r = sd_bus_creds_get_euid(creds, &uid);
2219         if (r < 0)
2220                 return r;
2221
2222         r = have_multiple_sessions(m, uid);
2223         if (r < 0)
2224                 return r;
2225
2226         multiple_sessions = r > 0;
2227         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2228
2229         handle = handle_action_from_string(sleep_verb);
2230         if (handle >= 0) {
2231                 const char *target;
2232
2233                 target = manager_target_for_action(handle);
2234                 if (target) {
2235                         _cleanup_free_ char *load_state = NULL;
2236
2237                         r = unit_load_state(m->bus, target, &load_state);
2238                         if (r < 0)
2239                                 return r;
2240
2241                         if (!streq(load_state, "loaded")) {
2242                                 result = "no";
2243                                 goto finish;
2244                         }
2245                 }
2246         }
2247
2248         if (multiple_sessions) {
2249                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2250                 if (r < 0)
2251                         return r;
2252
2253                 if (r > 0)
2254                         result = "yes";
2255                 else if (challenge)
2256                         result = "challenge";
2257                 else
2258                         result = "no";
2259         }
2260
2261         if (blocked) {
2262                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2263                 if (r < 0)
2264                         return r;
2265
2266                 if (r > 0 && !result)
2267                         result = "yes";
2268                 else if (challenge && (!result || streq(result, "yes")))
2269                         result = "challenge";
2270                 else
2271                         result = "no";
2272         }
2273
2274         if (!multiple_sessions && !blocked) {
2275                 /* If neither inhibit nor multiple sessions
2276                  * apply then just check the normal policy */
2277
2278                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2279                 if (r < 0)
2280                         return r;
2281
2282                 if (r > 0)
2283                         result = "yes";
2284                 else if (challenge)
2285                         result = "challenge";
2286                 else
2287                         result = "no";
2288         }
2289
2290  finish:
2291         return sd_bus_reply_method_return(message, "s", result);
2292 }
2293
2294 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2295         Manager *m = userdata;
2296
2297         return method_can_shutdown_or_sleep(
2298                         m, message,
2299                         INHIBIT_SHUTDOWN,
2300                         "org.freedesktop.login1.power-off",
2301                         "org.freedesktop.login1.power-off-multiple-sessions",
2302                         "org.freedesktop.login1.power-off-ignore-inhibit",
2303                         NULL,
2304                         error);
2305 }
2306
2307 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2308         Manager *m = userdata;
2309
2310         return method_can_shutdown_or_sleep(
2311                         m, message,
2312                         INHIBIT_SHUTDOWN,
2313                         "org.freedesktop.login1.reboot",
2314                         "org.freedesktop.login1.reboot-multiple-sessions",
2315                         "org.freedesktop.login1.reboot-ignore-inhibit",
2316                         NULL,
2317                         error);
2318 }
2319
2320 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2321         Manager *m = userdata;
2322
2323         return method_can_shutdown_or_sleep(
2324                         m, message,
2325                         INHIBIT_SHUTDOWN,
2326                         "org.freedesktop.login1.halt",
2327                         "org.freedesktop.login1.halt-multiple-sessions",
2328                         "org.freedesktop.login1.halt-ignore-inhibit",
2329                         NULL,
2330                         error);
2331 }
2332
2333 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2334         Manager *m = userdata;
2335
2336         return method_can_shutdown_or_sleep(
2337                         m, message,
2338                         INHIBIT_SLEEP,
2339                         "org.freedesktop.login1.suspend",
2340                         "org.freedesktop.login1.suspend-multiple-sessions",
2341                         "org.freedesktop.login1.suspend-ignore-inhibit",
2342                         "suspend",
2343                         error);
2344 }
2345
2346 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2347         Manager *m = userdata;
2348
2349         return method_can_shutdown_or_sleep(
2350                         m, message,
2351                         INHIBIT_SLEEP,
2352                         "org.freedesktop.login1.hibernate",
2353                         "org.freedesktop.login1.hibernate-multiple-sessions",
2354                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2355                         "hibernate",
2356                         error);
2357 }
2358
2359 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2360         Manager *m = userdata;
2361
2362         return method_can_shutdown_or_sleep(
2363                         m, message,
2364                         INHIBIT_SLEEP,
2365                         "org.freedesktop.login1.hibernate",
2366                         "org.freedesktop.login1.hibernate-multiple-sessions",
2367                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2368                         "hybrid-sleep",
2369                         error);
2370 }
2371
2372 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2373         Manager *m = userdata;
2374
2375         return method_can_shutdown_or_sleep(
2376                         m, message,
2377                         INHIBIT_SLEEP,
2378                         "org.freedesktop.login1.hibernate",
2379                         "org.freedesktop.login1.hibernate-multiple-sessions",
2380                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2381                         "suspend-then-hibernate",
2382                         error);
2383 }
2384
2385 static int property_get_reboot_to_firmware_setup(
2386                 sd_bus *bus,
2387                 const char *path,
2388                 const char *interface,
2389                 const char *property,
2390                 sd_bus_message *reply,
2391                 void *userdata,
2392                 sd_bus_error *error) {
2393         int r;
2394
2395         assert(bus);
2396         assert(reply);
2397         assert(userdata);
2398
2399         r = efi_get_reboot_to_firmware();
2400         if (r < 0 && r != -EOPNOTSUPP)
2401                 log_warning_errno(r, "Failed to determine reboot-to-firmware state: %m");
2402
2403         return sd_bus_message_append(reply, "b", r > 0);
2404 }
2405
2406 static int method_set_reboot_to_firmware_setup(
2407                 sd_bus_message *message,
2408                 void *userdata,
2409                 sd_bus_error *error) {
2410
2411         int b, r;
2412         Manager *m = userdata;
2413
2414         assert(message);
2415         assert(m);
2416
2417         r = sd_bus_message_read(message, "b", &b);
2418         if (r < 0)
2419                 return r;
2420
2421         r = bus_verify_polkit_async(message,
2422                                     CAP_SYS_ADMIN,
2423                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2424                                     NULL,
2425                                     false,
2426                                     UID_INVALID,
2427                                     &m->polkit_registry,
2428                                     error);
2429         if (r < 0)
2430                 return r;
2431         if (r == 0)
2432                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2433
2434         r = efi_set_reboot_to_firmware(b);
2435         if (r < 0)
2436                 return r;
2437
2438         return sd_bus_reply_method_return(message, NULL);
2439 }
2440
2441 static int method_can_reboot_to_firmware_setup(
2442                 sd_bus_message *message,
2443                 void *userdata,
2444                 sd_bus_error *error) {
2445
2446         int r;
2447         bool challenge;
2448         const char *result;
2449         Manager *m = userdata;
2450
2451         assert(message);
2452         assert(m);
2453
2454         r = efi_reboot_to_firmware_supported();
2455         if (r < 0) {
2456                 if (r != -EOPNOTSUPP)
2457                         log_warning_errno(errno, "Failed to determine whether reboot to firmware is supported: %m");
2458
2459                 return sd_bus_reply_method_return(message, "s", "na");
2460         }
2461
2462         r = bus_test_polkit(message,
2463                             CAP_SYS_ADMIN,
2464                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2465                             NULL,
2466                             UID_INVALID,
2467                             &challenge,
2468                             error);
2469         if (r < 0)
2470                 return r;
2471
2472         if (r > 0)
2473                 result = "yes";
2474         else if (challenge)
2475                 result = "challenge";
2476         else
2477                 result = "no";
2478
2479         return sd_bus_reply_method_return(message, "s", result);
2480 }
2481
2482 static int method_set_wall_message(
2483                 sd_bus_message *message,
2484                 void *userdata,
2485                 sd_bus_error *error) {
2486
2487         int r;
2488         Manager *m = userdata;
2489         char *wall_message;
2490         unsigned enable_wall_messages;
2491
2492         assert(message);
2493         assert(m);
2494
2495         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2496         if (r < 0)
2497                 return r;
2498
2499         r = bus_verify_polkit_async(message,
2500                                     CAP_SYS_ADMIN,
2501                                     "org.freedesktop.login1.set-wall-message",
2502                                     NULL,
2503                                     false,
2504                                     UID_INVALID,
2505                                     &m->polkit_registry,
2506                                     error);
2507         if (r < 0)
2508                 return r;
2509         if (r == 0)
2510                 return 1; /* Will call us back */
2511
2512         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2513         if (r < 0)
2514                 return log_oom();
2515
2516         m->enable_wall_messages = enable_wall_messages;
2517
2518         return sd_bus_reply_method_return(message, NULL);
2519 }
2520
2521 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2522         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2523         const char *who, *why, *what, *mode;
2524         _cleanup_free_ char *id = NULL;
2525         _cleanup_close_ int fifo_fd = -1;
2526         Manager *m = userdata;
2527         Inhibitor *i = NULL;
2528         InhibitMode mm;
2529         InhibitWhat w;
2530         pid_t pid;
2531         uid_t uid;
2532         int r;
2533
2534         assert(message);
2535         assert(m);
2536
2537         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2538         if (r < 0)
2539                 return r;
2540
2541         w = inhibit_what_from_string(what);
2542         if (w <= 0)
2543                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2544
2545         mm = inhibit_mode_from_string(mode);
2546         if (mm < 0)
2547                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2548
2549         /* Delay is only supported for shutdown/sleep */
2550         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2551                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2552
2553         /* Don't allow taking delay locks while we are already
2554          * executing the operation. We shouldn't create the impression
2555          * that the lock was successful if the machine is about to go
2556          * down/suspend any moment. */
2557         if (m->action_what & w)
2558                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2559
2560         r = bus_verify_polkit_async(
2561                         message,
2562                         CAP_SYS_BOOT,
2563                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2564                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2565                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2566                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2567                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2568                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2569                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2570                         NULL,
2571                         false,
2572                         UID_INVALID,
2573                         &m->polkit_registry,
2574                         error);
2575         if (r < 0)
2576                 return r;
2577         if (r == 0)
2578                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2579
2580         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2581         if (r < 0)
2582                 return r;
2583
2584         r = sd_bus_creds_get_euid(creds, &uid);
2585         if (r < 0)
2586                 return r;
2587
2588         r = sd_bus_creds_get_pid(creds, &pid);
2589         if (r < 0)
2590                 return r;
2591
2592         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2593                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2594
2595         do {
2596                 id = mfree(id);
2597
2598                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2599                         return -ENOMEM;
2600
2601         } while (hashmap_get(m->inhibitors, id));
2602
2603         r = manager_add_inhibitor(m, id, &i);
2604         if (r < 0)
2605                 return r;
2606
2607         i->what = w;
2608         i->mode = mm;
2609         i->pid = pid;
2610         i->uid = uid;
2611         i->why = strdup(why);
2612         i->who = strdup(who);
2613
2614         if (!i->why || !i->who) {
2615                 r = -ENOMEM;
2616                 goto fail;
2617         }
2618
2619         fifo_fd = inhibitor_create_fifo(i);
2620         if (fifo_fd < 0) {
2621                 r = fifo_fd;
2622                 goto fail;
2623         }
2624
2625         inhibitor_start(i);
2626
2627         return sd_bus_reply_method_return(message, "h", fifo_fd);
2628
2629 fail:
2630         if (i)
2631                 inhibitor_free(i);
2632
2633         return r;
2634 }
2635
2636 const sd_bus_vtable manager_vtable[] = {
2637         SD_BUS_VTABLE_START(0),
2638
2639         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2640         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2641
2642         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2643         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2644         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2645         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2646         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2647         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2648         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2649         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2650         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2651         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2652         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2653         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2654         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2655         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2656         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2657         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
2658         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2659         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2660         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2661         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2662         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2663         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2664         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2665         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2666         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2667         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2668         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2669         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
2670         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2671         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
2672         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
2673
2674         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2675         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2676         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2677         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2678         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2679         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2680         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2681         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2682         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2683         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2684         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2685         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2689         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2690         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2691         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2692         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2693         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2694         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2695         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2696         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2697         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2698         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2699         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2700         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2701         SD_BUS_METHOD("Halt", "b", NULL, method_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2702         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2703         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2704         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2705         SD_BUS_METHOD("SuspendThenHibernate", "b", NULL, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2706         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2707         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2708         SD_BUS_METHOD("CanHalt", NULL, "s", method_can_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2709         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2710         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2711         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2712         SD_BUS_METHOD("CanSuspendThenHibernate", NULL, "s", method_can_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2713         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2714         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2715         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2716         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2717         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2718         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2719
2720         SD_BUS_SIGNAL("SessionNew", "so", 0),
2721         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2722         SD_BUS_SIGNAL("UserNew", "uo", 0),
2723         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2724         SD_BUS_SIGNAL("SeatNew", "so", 0),
2725         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2726         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2727         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2728
2729         SD_BUS_VTABLE_END
2730 };
2731
2732 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2733         int r = 0;
2734
2735         assert(s);
2736         assert(unit);
2737
2738         if (!s->started)
2739                 return r;
2740
2741         if (streq(result, "done"))
2742                 r = session_send_create_reply(s, NULL);
2743         else {
2744                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2745
2746                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2747                 r = session_send_create_reply(s, &e);
2748         }
2749
2750         return r;
2751 }
2752
2753 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2754         const char *path, *result, *unit;
2755         Manager *m = userdata;
2756         Session *session;
2757         uint32_t id;
2758         User *user;
2759         int r;
2760
2761         assert(message);
2762         assert(m);
2763
2764         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2765         if (r < 0) {
2766                 bus_log_parse_error(r);
2767                 return 0;
2768         }
2769
2770         if (m->action_job && streq(m->action_job, path)) {
2771                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2772
2773                 /* Tell people that they now may take a lock again */
2774                 (void) send_prepare_for(m, m->action_what, false);
2775
2776                 m->action_job = mfree(m->action_job);
2777                 m->action_unit = NULL;
2778                 m->action_what = 0;
2779                 return 0;
2780         }
2781
2782         session = hashmap_get(m->session_units, unit);
2783         if (session && streq_ptr(path, session->scope_job)) {
2784                 session->scope_job = mfree(session->scope_job);
2785                 session_jobs_reply(session, unit, result);
2786
2787                 session_save(session);
2788                 user_save(session->user);
2789                 session_add_to_gc_queue(session);
2790         }
2791
2792         user = hashmap_get(m->user_units, unit);
2793         if (user &&
2794             (streq_ptr(path, user->service_job) ||
2795              streq_ptr(path, user->slice_job))) {
2796
2797                 if (streq_ptr(path, user->service_job))
2798                         user->service_job = mfree(user->service_job);
2799
2800                 if (streq_ptr(path, user->slice_job))
2801                         user->slice_job = mfree(user->slice_job);
2802
2803                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2804                         session_jobs_reply(session, unit, result);
2805
2806                 user_save(user);
2807                 user_add_to_gc_queue(user);
2808         }
2809
2810         return 0;
2811 }
2812
2813 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2814         const char *path, *unit;
2815         Manager *m = userdata;
2816         Session *session;
2817         User *user;
2818         int r;
2819
2820         assert(message);
2821         assert(m);
2822
2823         r = sd_bus_message_read(message, "so", &unit, &path);
2824         if (r < 0) {
2825                 bus_log_parse_error(r);
2826                 return 0;
2827         }
2828
2829         session = hashmap_get(m->session_units, unit);
2830         if (session)
2831                 session_add_to_gc_queue(session);
2832
2833         user = hashmap_get(m->user_units, unit);
2834         if (user)
2835                 user_add_to_gc_queue(user);
2836
2837         return 0;
2838 }
2839
2840 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2841         _cleanup_free_ char *unit = NULL;
2842         Manager *m = userdata;
2843         const char *path;
2844         Session *session;
2845         User *user;
2846         int r;
2847
2848         assert(message);
2849         assert(m);
2850
2851         path = sd_bus_message_get_path(message);
2852         if (!path)
2853                 return 0;
2854
2855         r = unit_name_from_dbus_path(path, &unit);
2856         if (r == -EINVAL) /* not a unit */
2857                 return 0;
2858         if (r < 0) {
2859                 log_oom();
2860                 return 0;
2861         }
2862
2863         session = hashmap_get(m->session_units, unit);
2864         if (session)
2865                 session_add_to_gc_queue(session);
2866
2867         user = hashmap_get(m->user_units, unit);
2868         if (user)
2869                 user_add_to_gc_queue(user);
2870
2871         return 0;
2872 }
2873
2874 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2875         Manager *m = userdata;
2876         Session *session;
2877         Iterator i;
2878         int b, r;
2879
2880         assert(message);
2881         assert(m);
2882
2883         r = sd_bus_message_read(message, "b", &b);
2884         if (r < 0) {
2885                 bus_log_parse_error(r);
2886                 return 0;
2887         }
2888
2889         if (b)
2890                 return 0;
2891
2892         /* systemd finished reloading, let's recheck all our sessions */
2893         log_debug("System manager has been reloaded, rechecking sessions...");
2894
2895         HASHMAP_FOREACH(session, m->sessions, i)
2896                 session_add_to_gc_queue(session);
2897
2898         return 0;
2899 }
2900
2901 int manager_send_changed(Manager *manager, const char *property, ...) {
2902         char **l;
2903
2904         assert(manager);
2905
2906         l = strv_from_stdarg_alloca(property);
2907
2908         return sd_bus_emit_properties_changed_strv(
2909                         manager->bus,
2910                         "/org/freedesktop/login1",
2911                         "org.freedesktop.login1.Manager",
2912                         l);
2913 }
2914
2915 static int strdup_job(sd_bus_message *reply, char **job) {
2916         const char *j;
2917         char *copy;
2918         int r;
2919
2920         r = sd_bus_message_read(reply, "o", &j);
2921         if (r < 0)
2922                 return r;
2923
2924         copy = strdup(j);
2925         if (!copy)
2926                 return -ENOMEM;
2927
2928         *job = copy;
2929         return 1;
2930 }
2931
2932 int manager_start_scope(
2933                 Manager *manager,
2934                 const char *scope,
2935                 pid_t pid,
2936                 const char *slice,
2937                 const char *description,
2938                 const char *after,
2939                 const char *after2,
2940                 sd_bus_message *more_properties,
2941                 sd_bus_error *error,
2942                 char **job) {
2943
2944         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2945         int r;
2946
2947         assert(manager);
2948         assert(scope);
2949         assert(pid > 1);
2950         assert(job);
2951
2952         r = sd_bus_message_new_method_call(
2953                         manager->bus,
2954                         &m,
2955                         "org.freedesktop.systemd1",
2956                         "/org/freedesktop/systemd1",
2957                         "org.freedesktop.systemd1.Manager",
2958                         "StartTransientUnit");
2959         if (r < 0)
2960                 return r;
2961
2962         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
2963         if (r < 0)
2964                 return r;
2965
2966         r = sd_bus_message_open_container(m, 'a', "(sv)");
2967         if (r < 0)
2968                 return r;
2969
2970         if (!isempty(slice)) {
2971                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
2972                 if (r < 0)
2973                         return r;
2974         }
2975
2976         if (!isempty(description)) {
2977                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2978                 if (r < 0)
2979                         return r;
2980         }
2981
2982         if (!isempty(after)) {
2983                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2984                 if (r < 0)
2985                         return r;
2986         }
2987
2988         if (!isempty(after2)) {
2989                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2990                 if (r < 0)
2991                         return r;
2992         }
2993
2994         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
2995          * SIGTERM */
2996         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
2997         if (r < 0)
2998                 return r;
2999
3000         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3001         if (r < 0)
3002                 return r;
3003
3004         /* disable TasksMax= for the session scope, rely on the slice setting for it */
3005         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
3006         if (r < 0)
3007                 return bus_log_create_error(r);
3008
3009         if (more_properties) {
3010                 /* If TasksMax also appears here, it will overwrite the default value set above */
3011                 r = sd_bus_message_copy(m, more_properties, true);
3012                 if (r < 0)
3013                         return r;
3014         }
3015
3016         r = sd_bus_message_close_container(m);
3017         if (r < 0)
3018                 return r;
3019
3020         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3021         if (r < 0)
3022                 return r;
3023
3024         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3025         if (r < 0)
3026                 return r;
3027
3028         return strdup_job(reply, job);
3029 }
3030
3031 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3032         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3033         int r;
3034
3035         assert(manager);
3036         assert(unit);
3037         assert(job);
3038
3039         r = sd_bus_call_method(
3040                         manager->bus,
3041                         "org.freedesktop.systemd1",
3042                         "/org/freedesktop/systemd1",
3043                         "org.freedesktop.systemd1.Manager",
3044                         "StartUnit",
3045                         error,
3046                         &reply,
3047                         "ss", unit, "replace");
3048         if (r < 0)
3049                 return r;
3050
3051         return strdup_job(reply, job);
3052 }
3053
3054 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3055         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3056         int r;
3057
3058         assert(manager);
3059         assert(unit);
3060         assert(job);
3061
3062         r = sd_bus_call_method(
3063                         manager->bus,
3064                         "org.freedesktop.systemd1",
3065                         "/org/freedesktop/systemd1",
3066                         "org.freedesktop.systemd1.Manager",
3067                         "StopUnit",
3068                         error,
3069                         &reply,
3070                         "ss", unit, "fail");
3071         if (r < 0) {
3072                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3073                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3074
3075                         *job = NULL;
3076                         sd_bus_error_free(error);
3077                         return 0;
3078                 }
3079
3080                 return r;
3081         }
3082
3083         return strdup_job(reply, job);
3084 }
3085
3086 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3087         _cleanup_free_ char *path = NULL;
3088         int r;
3089
3090         assert(manager);
3091         assert(scope);
3092
3093         path = unit_dbus_path_from_name(scope);
3094         if (!path)
3095                 return -ENOMEM;
3096
3097         r = sd_bus_call_method(
3098                         manager->bus,
3099                         "org.freedesktop.systemd1",
3100                         path,
3101                         "org.freedesktop.systemd1.Scope",
3102                         "Abandon",
3103                         error,
3104                         NULL,
3105                         NULL);
3106         if (r < 0) {
3107                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3108                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3109                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3110                         sd_bus_error_free(error);
3111                         return 0;
3112                 }
3113
3114                 return r;
3115         }
3116
3117         return 1;
3118 }
3119
3120 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3121         assert(manager);
3122         assert(unit);
3123
3124         return sd_bus_call_method(
3125                         manager->bus,
3126                         "org.freedesktop.systemd1",
3127                         "/org/freedesktop/systemd1",
3128                         "org.freedesktop.systemd1.Manager",
3129                         "KillUnit",
3130                         error,
3131                         NULL,
3132                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3133 }
3134
3135 int manager_unit_is_active(Manager *manager, const char *unit) {
3136         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3137         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3138         _cleanup_free_ char *path = NULL;
3139         const char *state;
3140         int r;
3141
3142         assert(manager);
3143         assert(unit);
3144
3145         path = unit_dbus_path_from_name(unit);
3146         if (!path)
3147                 return -ENOMEM;
3148
3149         r = sd_bus_get_property(
3150                         manager->bus,
3151                         "org.freedesktop.systemd1",
3152                         path,
3153                         "org.freedesktop.systemd1.Unit",
3154                         "ActiveState",
3155                         &error,
3156                         &reply,
3157                         "s");
3158         if (r < 0) {
3159                 /* systemd might have droppped off momentarily, let's
3160                  * not make this an error */
3161                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3162                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3163                         return true;
3164
3165                 /* If the unit is already unloaded then it's not
3166                  * active */
3167                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3168                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3169                         return false;
3170
3171                 return r;
3172         }
3173
3174         r = sd_bus_message_read(reply, "s", &state);
3175         if (r < 0)
3176                 return -EINVAL;
3177
3178         return !streq(state, "inactive") && !streq(state, "failed");
3179 }
3180
3181 int manager_job_is_active(Manager *manager, const char *path) {
3182         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3183         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3184         int r;
3185
3186         assert(manager);
3187         assert(path);
3188
3189         r = sd_bus_get_property(
3190                         manager->bus,
3191                         "org.freedesktop.systemd1",
3192                         path,
3193                         "org.freedesktop.systemd1.Job",
3194                         "State",
3195                         &error,
3196                         &reply,
3197                         "s");
3198         if (r < 0) {
3199                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3200                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3201                         return true;
3202
3203                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3204                         return false;
3205
3206                 return r;
3207         }
3208
3209         /* We don't actually care about the state really. The fact
3210          * that we could read the job state is enough for us */
3211
3212         return true;
3213 }