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 }
1426
1427 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1428         Manager *m = userdata;
1429
1430         assert(e);
1431         assert(m);
1432
1433         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1434         return 0;
1435 }
1436
1437 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1438         int r;
1439
1440         assert(m);
1441
1442         if (until <= now(CLOCK_MONOTONIC))
1443                 return 0;
1444
1445         /* We want to ignore the lid switch for a while after each
1446          * suspend, and after boot-up. Hence let's install a timer for
1447          * this. As long as the event source exists we ignore the lid
1448          * switch. */
1449
1450         if (m->lid_switch_ignore_event_source) {
1451                 usec_t u;
1452
1453                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1454                 if (r < 0)
1455                         return r;
1456
1457                 if (until <= u)
1458                         return 0;
1459
1460                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1461         } else
1462                 r = sd_event_add_time(
1463                                 m->event,
1464                                 &m->lid_switch_ignore_event_source,
1465                                 CLOCK_MONOTONIC,
1466                                 until, 0,
1467                                 lid_switch_ignore_handler, m);
1468
1469         return r;
1470 }
1471
1472 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1473
1474         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1475                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1476                 [INHIBIT_SLEEP] = "PrepareForSleep"
1477         };
1478
1479         int active = _active;
1480
1481         assert(m);
1482         assert(w >= 0);
1483         assert(w < _INHIBIT_WHAT_MAX);
1484         assert(signal_name[w]);
1485
1486         return sd_bus_emit_signal(m->bus,
1487                                   "/org/freedesktop/login1",
1488                                   "org.freedesktop.login1.Manager",
1489                                   signal_name[w],
1490                                   "b",
1491                                   active);
1492 }
1493
1494 static int execute_shutdown_or_sleep(
1495                 Manager *m,
1496                 InhibitWhat w,
1497                 const char *unit_name,
1498                 sd_bus_error *error) {
1499
1500         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1501         char *c = NULL;
1502         const char *p;
1503         int r;
1504
1505         assert(m);
1506         assert(w > 0);
1507         assert(w < _INHIBIT_WHAT_MAX);
1508         assert(unit_name);
1509
1510         if (w == INHIBIT_SHUTDOWN)
1511                 bus_manager_log_shutdown(m, unit_name);
1512
1513         r = sd_bus_call_method(
1514                         m->bus,
1515                         "org.freedesktop.systemd1",
1516                         "/org/freedesktop/systemd1",
1517                         "org.freedesktop.systemd1.Manager",
1518                         "StartUnit",
1519                         error,
1520                         &reply,
1521                         "ss", unit_name, "replace-irreversibly");
1522         if (r < 0)
1523                 goto error;
1524
1525         r = sd_bus_message_read(reply, "o", &p);
1526         if (r < 0)
1527                 goto error;
1528
1529         c = strdup(p);
1530         if (!c) {
1531                 r = -ENOMEM;
1532                 goto error;
1533         }
1534
1535         m->action_unit = unit_name;
1536         free(m->action_job);
1537         m->action_job = c;
1538         m->action_what = w;
1539
1540         /* Make sure the lid switch is ignored for a while */
1541         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1542
1543         return 0;
1544
1545 error:
1546         /* Tell people that they now may take a lock again */
1547         (void) send_prepare_for(m, w, false);
1548
1549         return r;
1550 }
1551
1552 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1553
1554         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1555         Inhibitor *offending = NULL;
1556         int r;
1557
1558         assert(manager);
1559
1560         if (manager->action_what == 0 || manager->action_job)
1561                 return 0;
1562
1563         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1564                 _cleanup_free_ char *comm = NULL, *u = NULL;
1565
1566                 if (!timeout)
1567                         return 0;
1568
1569                 (void) get_process_comm(offending->pid, &comm);
1570                 u = uid_to_name(offending->uid);
1571
1572                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1573                            offending->uid, strna(u),
1574                            offending->pid, strna(comm));
1575         }
1576
1577         /* Actually do the operation */
1578         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1579         if (r < 0) {
1580                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1581                             bus_error_message(&error, r));
1582
1583                 manager->action_unit = NULL;
1584                 manager->action_what = 0;
1585                 return r;
1586         }
1587
1588         return 1;
1589 }
1590
1591 static int manager_inhibit_timeout_handler(
1592                         sd_event_source *s,
1593                         uint64_t usec,
1594                         void *userdata) {
1595
1596         Manager *manager = userdata;
1597         int r;
1598
1599         assert(manager);
1600         assert(manager->inhibit_timeout_source == s);
1601
1602         r = manager_dispatch_delayed(manager, true);
1603         return (r < 0) ? r : 0;
1604 }
1605
1606 static int delay_shutdown_or_sleep(
1607                 Manager *m,
1608                 InhibitWhat w,
1609                 const char *unit_name) {
1610
1611         int r;
1612         usec_t timeout_val;
1613
1614         assert(m);
1615         assert(w >= 0);
1616         assert(w < _INHIBIT_WHAT_MAX);
1617         assert(unit_name);
1618
1619         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1620
1621         if (m->inhibit_timeout_source) {
1622                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1623                 if (r < 0)
1624                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1625
1626                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1627                 if (r < 0)
1628                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1629         } else {
1630                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1631                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1632                 if (r < 0)
1633                         return r;
1634         }
1635
1636         m->action_unit = unit_name;
1637         m->action_what = w;
1638
1639         return 0;
1640 }
1641
1642 int bus_manager_shutdown_or_sleep_now_or_later(
1643                 Manager *m,
1644                 const char *unit_name,
1645                 InhibitWhat w,
1646                 sd_bus_error *error) {
1647
1648         _cleanup_free_ char *load_state = NULL;
1649         bool delayed;
1650         int r;
1651
1652         assert(m);
1653         assert(unit_name);
1654         assert(w > 0);
1655         assert(w <= _INHIBIT_WHAT_MAX);
1656         assert(!m->action_job);
1657
1658         r = unit_load_state(m->bus, unit_name, &load_state);
1659         if (r < 0)
1660                 return r;
1661
1662         if (!streq(load_state, "loaded")) {
1663                 log_notice("Unit %s is %s, refusing operation.", unit_name, load_state);
1664                 return -EACCES;
1665         }
1666
1667         /* Tell everybody to prepare for shutdown/sleep */
1668         (void) send_prepare_for(m, w, true);
1669
1670         delayed =
1671                 m->inhibit_delay_max > 0 &&
1672                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1673
1674         if (delayed)
1675                 /* Shutdown is delayed, keep in mind what we
1676                  * want to do, and start a timeout */
1677                 r = delay_shutdown_or_sleep(m, w, unit_name);
1678         else
1679                 /* Shutdown is not delayed, execute it
1680                  * immediately */
1681                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1682
1683         return r;
1684 }
1685
1686 static int verify_shutdown_creds(
1687                 Manager *m,
1688                 sd_bus_message *message,
1689                 InhibitWhat w,
1690                 bool interactive,
1691                 const char *action,
1692                 const char *action_multiple_sessions,
1693                 const char *action_ignore_inhibit,
1694                 sd_bus_error *error) {
1695
1696         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1697         bool multiple_sessions, blocked;
1698         uid_t uid;
1699         int r;
1700
1701         assert(m);
1702         assert(message);
1703         assert(w >= 0);
1704         assert(w <= _INHIBIT_WHAT_MAX);
1705
1706         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1707         if (r < 0)
1708                 return r;
1709
1710         r = sd_bus_creds_get_euid(creds, &uid);
1711         if (r < 0)
1712                 return r;
1713
1714         r = have_multiple_sessions(m, uid);
1715         if (r < 0)
1716                 return r;
1717
1718         multiple_sessions = r > 0;
1719         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1720
1721         if (multiple_sessions && action_multiple_sessions) {
1722                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1723                 if (r < 0)
1724                         return r;
1725                 if (r == 0)
1726                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1727         }
1728
1729         if (blocked && action_ignore_inhibit) {
1730                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1731                 if (r < 0)
1732                         return r;
1733                 if (r == 0)
1734                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1735         }
1736
1737         if (!multiple_sessions && !blocked && action) {
1738                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1739                 if (r < 0)
1740                         return r;
1741                 if (r == 0)
1742                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1743         }
1744
1745         return 0;
1746 }
1747
1748 static int method_do_shutdown_or_sleep(
1749                 Manager *m,
1750                 sd_bus_message *message,
1751                 const char *unit_name,
1752                 InhibitWhat w,
1753                 const char *action,
1754                 const char *action_multiple_sessions,
1755                 const char *action_ignore_inhibit,
1756                 const char *sleep_verb,
1757                 sd_bus_error *error) {
1758
1759         int interactive, r;
1760
1761         assert(m);
1762         assert(message);
1763         assert(unit_name);
1764         assert(w >= 0);
1765         assert(w <= _INHIBIT_WHAT_MAX);
1766
1767         r = sd_bus_message_read(message, "b", &interactive);
1768         if (r < 0)
1769                 return r;
1770
1771         /* Don't allow multiple jobs being executed at the same time */
1772         if (m->action_what)
1773                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1774
1775         if (sleep_verb) {
1776                 r = can_sleep(sleep_verb);
1777                 if (r == -ENOSPC)
1778                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1779                                                 "Not enough swap space for hibernation");
1780                 if (r == 0)
1781                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1782                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1783                 if (r < 0)
1784                         return r;
1785         }
1786
1787         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1788                                   action_ignore_inhibit, error);
1789         if (r != 0)
1790                 return r;
1791
1792         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1793         if (r < 0)
1794                 return r;
1795
1796         return sd_bus_reply_method_return(message, NULL);
1797 }
1798
1799 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1800         Manager *m = userdata;
1801
1802         return method_do_shutdown_or_sleep(
1803                         m, message,
1804                         SPECIAL_POWEROFF_TARGET,
1805                         INHIBIT_SHUTDOWN,
1806                         "org.freedesktop.login1.power-off",
1807                         "org.freedesktop.login1.power-off-multiple-sessions",
1808                         "org.freedesktop.login1.power-off-ignore-inhibit",
1809                         NULL,
1810                         error);
1811 }
1812
1813 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1814         Manager *m = userdata;
1815
1816         return method_do_shutdown_or_sleep(
1817                         m, message,
1818                         SPECIAL_REBOOT_TARGET,
1819                         INHIBIT_SHUTDOWN,
1820                         "org.freedesktop.login1.reboot",
1821                         "org.freedesktop.login1.reboot-multiple-sessions",
1822                         "org.freedesktop.login1.reboot-ignore-inhibit",
1823                         NULL,
1824                         error);
1825 }
1826
1827 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1828         Manager *m = userdata;
1829
1830         return method_do_shutdown_or_sleep(
1831                         m, message,
1832                         SPECIAL_HALT_TARGET,
1833                         INHIBIT_SHUTDOWN,
1834                         "org.freedesktop.login1.halt",
1835                         "org.freedesktop.login1.halt-multiple-sessions",
1836                         "org.freedesktop.login1.halt-ignore-inhibit",
1837                         NULL,
1838                         error);
1839 }
1840
1841 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1842         Manager *m = userdata;
1843
1844         return method_do_shutdown_or_sleep(
1845                         m, message,
1846                         SPECIAL_SUSPEND_TARGET,
1847                         INHIBIT_SLEEP,
1848                         "org.freedesktop.login1.suspend",
1849                         "org.freedesktop.login1.suspend-multiple-sessions",
1850                         "org.freedesktop.login1.suspend-ignore-inhibit",
1851                         "suspend",
1852                         error);
1853 }
1854
1855 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1856         Manager *m = userdata;
1857
1858         return method_do_shutdown_or_sleep(
1859                         m, message,
1860                         SPECIAL_HIBERNATE_TARGET,
1861                         INHIBIT_SLEEP,
1862                         "org.freedesktop.login1.hibernate",
1863                         "org.freedesktop.login1.hibernate-multiple-sessions",
1864                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1865                         "hibernate",
1866                         error);
1867 }
1868
1869 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1870         Manager *m = userdata;
1871
1872         return method_do_shutdown_or_sleep(
1873                         m, message,
1874                         SPECIAL_HYBRID_SLEEP_TARGET,
1875                         INHIBIT_SLEEP,
1876                         "org.freedesktop.login1.hibernate",
1877                         "org.freedesktop.login1.hibernate-multiple-sessions",
1878                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1879                         "hybrid-sleep",
1880                         error);
1881 }
1882
1883 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1884         Manager *m = userdata;
1885
1886         return method_do_shutdown_or_sleep(
1887                         m, message,
1888                         SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
1889                         INHIBIT_SLEEP,
1890                         "org.freedesktop.login1.hibernate",
1891                         "org.freedesktop.login1.hibernate-multiple-sessions",
1892                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1893                         "hybrid-sleep",
1894                         error);
1895 }
1896
1897 static int nologin_timeout_handler(
1898                         sd_event_source *s,
1899                         uint64_t usec,
1900                         void *userdata) {
1901
1902         Manager *m = userdata;
1903
1904         log_info("Creating /run/nologin, blocking further logins...");
1905
1906         m->unlink_nologin =
1907                 create_shutdown_run_nologin_or_warn() >= 0;
1908
1909         return 0;
1910 }
1911
1912 static int update_schedule_file(Manager *m) {
1913         _cleanup_free_ char *temp_path = NULL;
1914         _cleanup_fclose_ FILE *f = NULL;
1915         int r;
1916
1917         assert(m);
1918
1919         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
1920         if (r < 0)
1921                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1922
1923         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1924         if (r < 0)
1925                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1926
1927         (void) fchmod(fileno(f), 0644);
1928
1929         fprintf(f,
1930                 "USEC="USEC_FMT"\n"
1931                 "WARN_WALL=%i\n"
1932                 "MODE=%s\n",
1933                 m->scheduled_shutdown_timeout,
1934                 m->enable_wall_messages,
1935                 m->scheduled_shutdown_type);
1936
1937         if (!isempty(m->wall_message)) {
1938                 _cleanup_free_ char *t;
1939
1940                 t = cescape(m->wall_message);
1941                 if (!t) {
1942                         r = -ENOMEM;
1943                         goto fail;
1944                 }
1945
1946                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1947         }
1948
1949         r = fflush_and_check(f);
1950         if (r < 0)
1951                 goto fail;
1952
1953         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1954                 r = -errno;
1955                 goto fail;
1956         }
1957
1958         return 0;
1959
1960 fail:
1961         (void) unlink(temp_path);
1962         (void) unlink("/run/systemd/shutdown/scheduled");
1963
1964         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
1965 }
1966
1967 static void reset_scheduled_shutdown(Manager *m) {
1968         assert(m);
1969
1970         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1971         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1972         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1973
1974         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1975         m->scheduled_shutdown_timeout = 0;
1976         m->shutdown_dry_run = false;
1977
1978         if (m->unlink_nologin) {
1979                 (void) unlink_or_warn("/run/nologin");
1980                 m->unlink_nologin = false;
1981         }
1982
1983         (void) unlink("/run/systemd/shutdown/scheduled");
1984 }
1985
1986 static int manager_scheduled_shutdown_handler(
1987                         sd_event_source *s,
1988                         uint64_t usec,
1989                         void *userdata) {
1990
1991         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1992         Manager *m = userdata;
1993         const char *target;
1994         int r;
1995
1996         assert(m);
1997
1998         if (isempty(m->scheduled_shutdown_type))
1999                 return 0;
2000
2001         if (streq(m->scheduled_shutdown_type, "poweroff"))
2002                 target = SPECIAL_POWEROFF_TARGET;
2003         else if (streq(m->scheduled_shutdown_type, "reboot"))
2004                 target = SPECIAL_REBOOT_TARGET;
2005         else if (streq(m->scheduled_shutdown_type, "halt"))
2006                 target = SPECIAL_HALT_TARGET;
2007         else
2008                 assert_not_reached("unexpected shutdown type");
2009
2010         /* Don't allow multiple jobs being executed at the same time */
2011         if (m->action_what) {
2012                 r = -EALREADY;
2013                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2014                 goto error;
2015         }
2016
2017         if (m->shutdown_dry_run) {
2018                 /* We do not process delay inhibitors here.  Otherwise, we
2019                  * would have to be considered "in progress" (like the check
2020                  * above) for some seconds after our admin has seen the final
2021                  * wall message. */
2022
2023                 bus_manager_log_shutdown(m, target);
2024                 log_info("Running in dry run, suppressing action.");
2025                 reset_scheduled_shutdown(m);
2026
2027                 return 0;
2028         }
2029
2030         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2031         if (r < 0) {
2032                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2033                 goto error;
2034         }
2035
2036         return 0;
2037
2038 error:
2039         reset_scheduled_shutdown(m);
2040         return r;
2041 }
2042
2043 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2044         Manager *m = userdata;
2045         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2046         const char *action_multiple_sessions = NULL;
2047         const char *action_ignore_inhibit = NULL;
2048         const char *action = NULL;
2049         uint64_t elapse;
2050         char *type;
2051         int r;
2052         bool dry_run = false;
2053
2054         assert(m);
2055         assert(message);
2056
2057         r = sd_bus_message_read(message, "st", &type, &elapse);
2058         if (r < 0)
2059                 return r;
2060
2061         if (startswith(type, "dry-")) {
2062                 type += 4;
2063                 dry_run = true;
2064         }
2065
2066         if (streq(type, "poweroff")) {
2067                 action = "org.freedesktop.login1.power-off";
2068                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2069                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2070         } else if (streq(type, "reboot")) {
2071                 action = "org.freedesktop.login1.reboot";
2072                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2073                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2074         } else if (streq(type, "halt")) {
2075                 action = "org.freedesktop.login1.halt";
2076                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2077                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2078         } else
2079                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2080
2081         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2082                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2083         if (r != 0)
2084                 return r;
2085
2086         if (m->scheduled_shutdown_timeout_source) {
2087                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2088                 if (r < 0)
2089                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2090
2091                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2092                 if (r < 0)
2093                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2094         } else {
2095                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2096                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2097                 if (r < 0)
2098                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2099         }
2100
2101         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2102         if (r < 0) {
2103                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2104                 return log_oom();
2105         }
2106
2107         m->shutdown_dry_run = dry_run;
2108
2109         if (m->nologin_timeout_source) {
2110                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2111                 if (r < 0)
2112                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2113
2114                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2115                 if (r < 0)
2116                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2117         } else {
2118                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2119                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2120                 if (r < 0)
2121                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2122         }
2123
2124         m->scheduled_shutdown_timeout = elapse;
2125
2126         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2127         if (r >= 0) {
2128                 const char *tty = NULL;
2129
2130                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2131                 (void) sd_bus_creds_get_tty(creds, &tty);
2132
2133                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2134                 if (r < 0) {
2135                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2136                         return log_oom();
2137                 }
2138         }
2139
2140         r = manager_setup_wall_message_timer(m);
2141         if (r < 0)
2142                 return r;
2143
2144         r = update_schedule_file(m);
2145         if (r < 0)
2146                 return r;
2147
2148         return sd_bus_reply_method_return(message, NULL);
2149 }
2150
2151 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2152         Manager *m = userdata;
2153         bool cancelled;
2154
2155         assert(m);
2156         assert(message);
2157
2158         cancelled = m->scheduled_shutdown_type != NULL;
2159         reset_scheduled_shutdown(m);
2160
2161         if (cancelled && m->enable_wall_messages) {
2162                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2163                 const char *tty = NULL;
2164                 uid_t uid = 0;
2165                 int r;
2166
2167                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2168                 if (r >= 0) {
2169                         (void) sd_bus_creds_get_uid(creds, &uid);
2170                         (void) sd_bus_creds_get_tty(creds, &tty);
2171                 }
2172
2173                 utmp_wall("The system shutdown has been cancelled",
2174                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2175         }
2176
2177         return sd_bus_reply_method_return(message, "b", cancelled);
2178 }
2179
2180 static int method_can_shutdown_or_sleep(
2181                 Manager *m,
2182                 sd_bus_message *message,
2183                 InhibitWhat w,
2184                 const char *action,
2185                 const char *action_multiple_sessions,
2186                 const char *action_ignore_inhibit,
2187                 const char *sleep_verb,
2188                 sd_bus_error *error) {
2189
2190         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2191         HandleAction handle;
2192         bool multiple_sessions, challenge, blocked;
2193         const char *result = NULL;
2194         uid_t uid;
2195         int r;
2196
2197         assert(m);
2198         assert(message);
2199         assert(w >= 0);
2200         assert(w <= _INHIBIT_WHAT_MAX);
2201         assert(action);
2202         assert(action_multiple_sessions);
2203         assert(action_ignore_inhibit);
2204
2205         if (sleep_verb) {
2206                 r = can_sleep(sleep_verb);
2207                 if (IN_SET(r,  0, -ENOSPC))
2208                         return sd_bus_reply_method_return(message, "s", "na");
2209                 if (r < 0)
2210                         return r;
2211         }
2212
2213         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2214         if (r < 0)
2215                 return r;
2216
2217         r = sd_bus_creds_get_euid(creds, &uid);
2218         if (r < 0)
2219                 return r;
2220
2221         r = have_multiple_sessions(m, uid);
2222         if (r < 0)
2223                 return r;
2224
2225         multiple_sessions = r > 0;
2226         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2227
2228         handle = handle_action_from_string(sleep_verb);
2229         if (handle >= 0) {
2230                 const char *target;
2231
2232                 target = manager_target_for_action(handle);
2233                 if (target) {
2234                         _cleanup_free_ char *load_state = NULL;
2235
2236                         r = unit_load_state(m->bus, target, &load_state);
2237                         if (r < 0)
2238                                 return r;
2239
2240                         if (!streq(load_state, "loaded")) {
2241                                 result = "no";
2242                                 goto finish;
2243                         }
2244                 }
2245         }
2246
2247         if (multiple_sessions) {
2248                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2249                 if (r < 0)
2250                         return r;
2251
2252                 if (r > 0)
2253                         result = "yes";
2254                 else if (challenge)
2255                         result = "challenge";
2256                 else
2257                         result = "no";
2258         }
2259
2260         if (blocked) {
2261                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2262                 if (r < 0)
2263                         return r;
2264
2265                 if (r > 0 && !result)
2266                         result = "yes";
2267                 else if (challenge && (!result || streq(result, "yes")))
2268                         result = "challenge";
2269                 else
2270                         result = "no";
2271         }
2272
2273         if (!multiple_sessions && !blocked) {
2274                 /* If neither inhibit nor multiple sessions
2275                  * apply then just check the normal policy */
2276
2277                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2278                 if (r < 0)
2279                         return r;
2280
2281                 if (r > 0)
2282                         result = "yes";
2283                 else if (challenge)
2284                         result = "challenge";
2285                 else
2286                         result = "no";
2287         }
2288
2289  finish:
2290         return sd_bus_reply_method_return(message, "s", result);
2291 }
2292
2293 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2294         Manager *m = userdata;
2295
2296         return method_can_shutdown_or_sleep(
2297                         m, message,
2298                         INHIBIT_SHUTDOWN,
2299                         "org.freedesktop.login1.power-off",
2300                         "org.freedesktop.login1.power-off-multiple-sessions",
2301                         "org.freedesktop.login1.power-off-ignore-inhibit",
2302                         NULL,
2303                         error);
2304 }
2305
2306 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2307         Manager *m = userdata;
2308
2309         return method_can_shutdown_or_sleep(
2310                         m, message,
2311                         INHIBIT_SHUTDOWN,
2312                         "org.freedesktop.login1.reboot",
2313                         "org.freedesktop.login1.reboot-multiple-sessions",
2314                         "org.freedesktop.login1.reboot-ignore-inhibit",
2315                         NULL,
2316                         error);
2317 }
2318
2319 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2320         Manager *m = userdata;
2321
2322         return method_can_shutdown_or_sleep(
2323                         m, message,
2324                         INHIBIT_SHUTDOWN,
2325                         "org.freedesktop.login1.halt",
2326                         "org.freedesktop.login1.halt-multiple-sessions",
2327                         "org.freedesktop.login1.halt-ignore-inhibit",
2328                         NULL,
2329                         error);
2330 }
2331
2332 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2333         Manager *m = userdata;
2334
2335         return method_can_shutdown_or_sleep(
2336                         m, message,
2337                         INHIBIT_SLEEP,
2338                         "org.freedesktop.login1.suspend",
2339                         "org.freedesktop.login1.suspend-multiple-sessions",
2340                         "org.freedesktop.login1.suspend-ignore-inhibit",
2341                         "suspend",
2342                         error);
2343 }
2344
2345 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2346         Manager *m = userdata;
2347
2348         return method_can_shutdown_or_sleep(
2349                         m, message,
2350                         INHIBIT_SLEEP,
2351                         "org.freedesktop.login1.hibernate",
2352                         "org.freedesktop.login1.hibernate-multiple-sessions",
2353                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2354                         "hibernate",
2355                         error);
2356 }
2357
2358 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2359         Manager *m = userdata;
2360
2361         return method_can_shutdown_or_sleep(
2362                         m, message,
2363                         INHIBIT_SLEEP,
2364                         "org.freedesktop.login1.hibernate",
2365                         "org.freedesktop.login1.hibernate-multiple-sessions",
2366                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2367                         "hybrid-sleep",
2368                         error);
2369 }
2370
2371 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2372         Manager *m = userdata;
2373
2374         return method_can_shutdown_or_sleep(
2375                         m, message,
2376                         INHIBIT_SLEEP,
2377                         "org.freedesktop.login1.hibernate",
2378                         "org.freedesktop.login1.hibernate-multiple-sessions",
2379                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2380                         "suspend-then-hibernate",
2381                         error);
2382 }
2383
2384 static int property_get_reboot_to_firmware_setup(
2385                 sd_bus *bus,
2386                 const char *path,
2387                 const char *interface,
2388                 const char *property,
2389                 sd_bus_message *reply,
2390                 void *userdata,
2391                 sd_bus_error *error) {
2392         int r;
2393
2394         assert(bus);
2395         assert(reply);
2396         assert(userdata);
2397
2398         r = efi_get_reboot_to_firmware();
2399         if (r < 0 && r != -EOPNOTSUPP)
2400                 log_warning_errno(r, "Failed to determine reboot-to-firmware state: %m");
2401
2402         return sd_bus_message_append(reply, "b", r > 0);
2403 }
2404
2405 static int method_set_reboot_to_firmware_setup(
2406                 sd_bus_message *message,
2407                 void *userdata,
2408                 sd_bus_error *error) {
2409
2410         int b, r;
2411         Manager *m = userdata;
2412
2413         assert(message);
2414         assert(m);
2415
2416         r = sd_bus_message_read(message, "b", &b);
2417         if (r < 0)
2418                 return r;
2419
2420         r = bus_verify_polkit_async(message,
2421                                     CAP_SYS_ADMIN,
2422                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2423                                     NULL,
2424                                     false,
2425                                     UID_INVALID,
2426                                     &m->polkit_registry,
2427                                     error);
2428         if (r < 0)
2429                 return r;
2430         if (r == 0)
2431                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2432
2433         r = efi_set_reboot_to_firmware(b);
2434         if (r < 0)
2435                 return r;
2436
2437         return sd_bus_reply_method_return(message, NULL);
2438 }
2439
2440 static int method_can_reboot_to_firmware_setup(
2441                 sd_bus_message *message,
2442                 void *userdata,
2443                 sd_bus_error *error) {
2444
2445         int r;
2446         bool challenge;
2447         const char *result;
2448         Manager *m = userdata;
2449
2450         assert(message);
2451         assert(m);
2452
2453         r = efi_reboot_to_firmware_supported();
2454         if (r < 0) {
2455                 if (r != -EOPNOTSUPP)
2456                         log_warning_errno(errno, "Failed to determine whether reboot to firmware is supported: %m");
2457
2458                 return sd_bus_reply_method_return(message, "s", "na");
2459         }
2460
2461         r = bus_test_polkit(message,
2462                             CAP_SYS_ADMIN,
2463                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2464                             NULL,
2465                             UID_INVALID,
2466                             &challenge,
2467                             error);
2468         if (r < 0)
2469                 return r;
2470
2471         if (r > 0)
2472                 result = "yes";
2473         else if (challenge)
2474                 result = "challenge";
2475         else
2476                 result = "no";
2477
2478         return sd_bus_reply_method_return(message, "s", result);
2479 }
2480
2481 static int method_set_wall_message(
2482                 sd_bus_message *message,
2483                 void *userdata,
2484                 sd_bus_error *error) {
2485
2486         int r;
2487         Manager *m = userdata;
2488         char *wall_message;
2489         unsigned enable_wall_messages;
2490
2491         assert(message);
2492         assert(m);
2493
2494         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2495         if (r < 0)
2496                 return r;
2497
2498         r = bus_verify_polkit_async(message,
2499                                     CAP_SYS_ADMIN,
2500                                     "org.freedesktop.login1.set-wall-message",
2501                                     NULL,
2502                                     false,
2503                                     UID_INVALID,
2504                                     &m->polkit_registry,
2505                                     error);
2506         if (r < 0)
2507                 return r;
2508         if (r == 0)
2509                 return 1; /* Will call us back */
2510
2511         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2512         if (r < 0)
2513                 return log_oom();
2514
2515         m->enable_wall_messages = enable_wall_messages;
2516
2517         return sd_bus_reply_method_return(message, NULL);
2518 }
2519
2520 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2521         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2522         const char *who, *why, *what, *mode;
2523         _cleanup_free_ char *id = NULL;
2524         _cleanup_close_ int fifo_fd = -1;
2525         Manager *m = userdata;
2526         Inhibitor *i = NULL;
2527         InhibitMode mm;
2528         InhibitWhat w;
2529         pid_t pid;
2530         uid_t uid;
2531         int r;
2532
2533         assert(message);
2534         assert(m);
2535
2536         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2537         if (r < 0)
2538                 return r;
2539
2540         w = inhibit_what_from_string(what);
2541         if (w <= 0)
2542                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2543
2544         mm = inhibit_mode_from_string(mode);
2545         if (mm < 0)
2546                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2547
2548         /* Delay is only supported for shutdown/sleep */
2549         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2550                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2551
2552         /* Don't allow taking delay locks while we are already
2553          * executing the operation. We shouldn't create the impression
2554          * that the lock was successful if the machine is about to go
2555          * down/suspend any moment. */
2556         if (m->action_what & w)
2557                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2558
2559         r = bus_verify_polkit_async(
2560                         message,
2561                         CAP_SYS_BOOT,
2562                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2563                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2564                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2565                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2566                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2567                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2568                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2569                         NULL,
2570                         false,
2571                         UID_INVALID,
2572                         &m->polkit_registry,
2573                         error);
2574         if (r < 0)
2575                 return r;
2576         if (r == 0)
2577                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2578
2579         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2580         if (r < 0)
2581                 return r;
2582
2583         r = sd_bus_creds_get_euid(creds, &uid);
2584         if (r < 0)
2585                 return r;
2586
2587         r = sd_bus_creds_get_pid(creds, &pid);
2588         if (r < 0)
2589                 return r;
2590
2591         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2592                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2593
2594         do {
2595                 id = mfree(id);
2596
2597                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2598                         return -ENOMEM;
2599
2600         } while (hashmap_get(m->inhibitors, id));
2601
2602         r = manager_add_inhibitor(m, id, &i);
2603         if (r < 0)
2604                 return r;
2605
2606         i->what = w;
2607         i->mode = mm;
2608         i->pid = pid;
2609         i->uid = uid;
2610         i->why = strdup(why);
2611         i->who = strdup(who);
2612
2613         if (!i->why || !i->who) {
2614                 r = -ENOMEM;
2615                 goto fail;
2616         }
2617
2618         fifo_fd = inhibitor_create_fifo(i);
2619         if (fifo_fd < 0) {
2620                 r = fifo_fd;
2621                 goto fail;
2622         }
2623
2624         inhibitor_start(i);
2625
2626         return sd_bus_reply_method_return(message, "h", fifo_fd);
2627
2628 fail:
2629         if (i)
2630                 inhibitor_free(i);
2631
2632         return r;
2633 }
2634
2635 const sd_bus_vtable manager_vtable[] = {
2636         SD_BUS_VTABLE_START(0),
2637
2638         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2639         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2640
2641         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2642         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2643         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2644         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2645         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2646         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2647         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2648         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2649         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2650         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2651         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2652         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2653         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2654         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2655         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2656         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
2657         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2658         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2659         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2660         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2661         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2662         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2663         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2664         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2665         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2666         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2667         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2668         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
2669         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2670         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
2671         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
2672
2673         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2674         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2675         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2676         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2677         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2678         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2679         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2680         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2681         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2682         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2683         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2684         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2685         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2689         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2690         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2691         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2692         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2693         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2694         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2695         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2696         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2697         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2698         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2699         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2700         SD_BUS_METHOD("Halt", "b", NULL, method_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2701         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2702         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2703         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2704         SD_BUS_METHOD("SuspendThenHibernate", "b", NULL, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2705         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2706         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2707         SD_BUS_METHOD("CanHalt", NULL, "s", method_can_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2708         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2709         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2710         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2711         SD_BUS_METHOD("CanSuspendThenHibernate", NULL, "s", method_can_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2712         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2713         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2714         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2715         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2716         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2717         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2718
2719         SD_BUS_SIGNAL("SessionNew", "so", 0),
2720         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2721         SD_BUS_SIGNAL("UserNew", "uo", 0),
2722         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2723         SD_BUS_SIGNAL("SeatNew", "so", 0),
2724         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2725         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2726         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2727
2728         SD_BUS_VTABLE_END
2729 };
2730
2731 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2732         int r = 0;
2733
2734         assert(s);
2735         assert(unit);
2736
2737         if (!s->started)
2738                 return r;
2739
2740         if (streq(result, "done"))
2741                 r = session_send_create_reply(s, NULL);
2742         else {
2743                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2744
2745                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2746                 r = session_send_create_reply(s, &e);
2747         }
2748
2749         return r;
2750 }
2751
2752 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2753         const char *path, *result, *unit;
2754         Manager *m = userdata;
2755         Session *session;
2756         uint32_t id;
2757         User *user;
2758         int r;
2759
2760         assert(message);
2761         assert(m);
2762
2763         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2764         if (r < 0) {
2765                 bus_log_parse_error(r);
2766                 return 0;
2767         }
2768
2769         if (m->action_job && streq(m->action_job, path)) {
2770                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2771
2772                 /* Tell people that they now may take a lock again */
2773                 (void) send_prepare_for(m, m->action_what, false);
2774
2775                 m->action_job = mfree(m->action_job);
2776                 m->action_unit = NULL;
2777                 m->action_what = 0;
2778                 return 0;
2779         }
2780
2781         session = hashmap_get(m->session_units, unit);
2782         if (session && streq_ptr(path, session->scope_job)) {
2783                 session->scope_job = mfree(session->scope_job);
2784                 session_jobs_reply(session, unit, result);
2785
2786                 session_save(session);
2787                 user_save(session->user);
2788                 session_add_to_gc_queue(session);
2789         }
2790
2791         user = hashmap_get(m->user_units, unit);
2792         if (user &&
2793             (streq_ptr(path, user->service_job) ||
2794              streq_ptr(path, user->slice_job))) {
2795
2796                 if (streq_ptr(path, user->service_job))
2797                         user->service_job = mfree(user->service_job);
2798
2799                 if (streq_ptr(path, user->slice_job))
2800                         user->slice_job = mfree(user->slice_job);
2801
2802                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2803                         session_jobs_reply(session, unit, result);
2804
2805                 user_save(user);
2806                 user_add_to_gc_queue(user);
2807         }
2808
2809         return 0;
2810 }
2811
2812 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2813         const char *path, *unit;
2814         Manager *m = userdata;
2815         Session *session;
2816         User *user;
2817         int r;
2818
2819         assert(message);
2820         assert(m);
2821
2822         r = sd_bus_message_read(message, "so", &unit, &path);
2823         if (r < 0) {
2824                 bus_log_parse_error(r);
2825                 return 0;
2826         }
2827
2828         session = hashmap_get(m->session_units, unit);
2829         if (session)
2830                 session_add_to_gc_queue(session);
2831
2832         user = hashmap_get(m->user_units, unit);
2833         if (user)
2834                 user_add_to_gc_queue(user);
2835
2836         return 0;
2837 }
2838
2839 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2840         _cleanup_free_ char *unit = NULL;
2841         Manager *m = userdata;
2842         const char *path;
2843         Session *session;
2844         User *user;
2845         int r;
2846
2847         assert(message);
2848         assert(m);
2849
2850         path = sd_bus_message_get_path(message);
2851         if (!path)
2852                 return 0;
2853
2854         r = unit_name_from_dbus_path(path, &unit);
2855         if (r == -EINVAL) /* not a unit */
2856                 return 0;
2857         if (r < 0) {
2858                 log_oom();
2859                 return 0;
2860         }
2861
2862         session = hashmap_get(m->session_units, unit);
2863         if (session)
2864                 session_add_to_gc_queue(session);
2865
2866         user = hashmap_get(m->user_units, unit);
2867         if (user)
2868                 user_add_to_gc_queue(user);
2869
2870         return 0;
2871 }
2872
2873 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2874         Manager *m = userdata;
2875         Session *session;
2876         Iterator i;
2877         int b, r;
2878
2879         assert(message);
2880         assert(m);
2881
2882         r = sd_bus_message_read(message, "b", &b);
2883         if (r < 0) {
2884                 bus_log_parse_error(r);
2885                 return 0;
2886         }
2887
2888         if (b)
2889                 return 0;
2890
2891         /* systemd finished reloading, let's recheck all our sessions */
2892         log_debug("System manager has been reloaded, rechecking sessions...");
2893
2894         HASHMAP_FOREACH(session, m->sessions, i)
2895                 session_add_to_gc_queue(session);
2896
2897         return 0;
2898 }
2899
2900 int manager_send_changed(Manager *manager, const char *property, ...) {
2901         char **l;
2902
2903         assert(manager);
2904
2905         l = strv_from_stdarg_alloca(property);
2906
2907         return sd_bus_emit_properties_changed_strv(
2908                         manager->bus,
2909                         "/org/freedesktop/login1",
2910                         "org.freedesktop.login1.Manager",
2911                         l);
2912 }
2913
2914 static int strdup_job(sd_bus_message *reply, char **job) {
2915         const char *j;
2916         char *copy;
2917         int r;
2918
2919         r = sd_bus_message_read(reply, "o", &j);
2920         if (r < 0)
2921                 return r;
2922
2923         copy = strdup(j);
2924         if (!copy)
2925                 return -ENOMEM;
2926
2927         *job = copy;
2928         return 1;
2929 }
2930
2931 int manager_start_scope(
2932                 Manager *manager,
2933                 const char *scope,
2934                 pid_t pid,
2935                 const char *slice,
2936                 const char *description,
2937                 const char *after,
2938                 const char *after2,
2939                 sd_bus_message *more_properties,
2940                 sd_bus_error *error,
2941                 char **job) {
2942
2943         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2944         int r;
2945
2946         assert(manager);
2947         assert(scope);
2948         assert(pid > 1);
2949         assert(job);
2950
2951         r = sd_bus_message_new_method_call(
2952                         manager->bus,
2953                         &m,
2954                         "org.freedesktop.systemd1",
2955                         "/org/freedesktop/systemd1",
2956                         "org.freedesktop.systemd1.Manager",
2957                         "StartTransientUnit");
2958         if (r < 0)
2959                 return r;
2960
2961         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
2962         if (r < 0)
2963                 return r;
2964
2965         r = sd_bus_message_open_container(m, 'a', "(sv)");
2966         if (r < 0)
2967                 return r;
2968
2969         if (!isempty(slice)) {
2970                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
2971                 if (r < 0)
2972                         return r;
2973         }
2974
2975         if (!isempty(description)) {
2976                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2977                 if (r < 0)
2978                         return r;
2979         }
2980
2981         if (!isempty(after)) {
2982                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2983                 if (r < 0)
2984                         return r;
2985         }
2986
2987         if (!isempty(after2)) {
2988                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2989                 if (r < 0)
2990                         return r;
2991         }
2992
2993         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
2994          * SIGTERM */
2995         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
2996         if (r < 0)
2997                 return r;
2998
2999         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3000         if (r < 0)
3001                 return r;
3002
3003         /* disable TasksMax= for the session scope, rely on the slice setting for it */
3004         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
3005         if (r < 0)
3006                 return bus_log_create_error(r);
3007
3008         if (more_properties) {
3009                 /* If TasksMax also appears here, it will overwrite the default value set above */
3010                 r = sd_bus_message_copy(m, more_properties, true);
3011                 if (r < 0)
3012                         return r;
3013         }
3014
3015         r = sd_bus_message_close_container(m);
3016         if (r < 0)
3017                 return r;
3018
3019         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3020         if (r < 0)
3021                 return r;
3022
3023         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3024         if (r < 0)
3025                 return r;
3026
3027         return strdup_job(reply, job);
3028 }
3029
3030 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3031         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3032         int r;
3033
3034         assert(manager);
3035         assert(unit);
3036         assert(job);
3037
3038         r = sd_bus_call_method(
3039                         manager->bus,
3040                         "org.freedesktop.systemd1",
3041                         "/org/freedesktop/systemd1",
3042                         "org.freedesktop.systemd1.Manager",
3043                         "StartUnit",
3044                         error,
3045                         &reply,
3046                         "ss", unit, "replace");
3047         if (r < 0)
3048                 return r;
3049
3050         return strdup_job(reply, job);
3051 }
3052
3053 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3054         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3055         int r;
3056
3057         assert(manager);
3058         assert(unit);
3059         assert(job);
3060
3061         r = sd_bus_call_method(
3062                         manager->bus,
3063                         "org.freedesktop.systemd1",
3064                         "/org/freedesktop/systemd1",
3065                         "org.freedesktop.systemd1.Manager",
3066                         "StopUnit",
3067                         error,
3068                         &reply,
3069                         "ss", unit, "fail");
3070         if (r < 0) {
3071                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3072                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3073
3074                         *job = NULL;
3075                         sd_bus_error_free(error);
3076                         return 0;
3077                 }
3078
3079                 return r;
3080         }
3081
3082         return strdup_job(reply, job);
3083 }
3084
3085 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3086         _cleanup_free_ char *path = NULL;
3087         int r;
3088
3089         assert(manager);
3090         assert(scope);
3091
3092         path = unit_dbus_path_from_name(scope);
3093         if (!path)
3094                 return -ENOMEM;
3095
3096         r = sd_bus_call_method(
3097                         manager->bus,
3098                         "org.freedesktop.systemd1",
3099                         path,
3100                         "org.freedesktop.systemd1.Scope",
3101                         "Abandon",
3102                         error,
3103                         NULL,
3104                         NULL);
3105         if (r < 0) {
3106                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3107                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3108                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3109                         sd_bus_error_free(error);
3110                         return 0;
3111                 }
3112
3113                 return r;
3114         }
3115
3116         return 1;
3117 }
3118
3119 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3120         assert(manager);
3121         assert(unit);
3122
3123         return sd_bus_call_method(
3124                         manager->bus,
3125                         "org.freedesktop.systemd1",
3126                         "/org/freedesktop/systemd1",
3127                         "org.freedesktop.systemd1.Manager",
3128                         "KillUnit",
3129                         error,
3130                         NULL,
3131                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3132 }
3133
3134 int manager_unit_is_active(Manager *manager, const char *unit) {
3135         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3136         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3137         _cleanup_free_ char *path = NULL;
3138         const char *state;
3139         int r;
3140
3141         assert(manager);
3142         assert(unit);
3143
3144         path = unit_dbus_path_from_name(unit);
3145         if (!path)
3146                 return -ENOMEM;
3147
3148         r = sd_bus_get_property(
3149                         manager->bus,
3150                         "org.freedesktop.systemd1",
3151                         path,
3152                         "org.freedesktop.systemd1.Unit",
3153                         "ActiveState",
3154                         &error,
3155                         &reply,
3156                         "s");
3157         if (r < 0) {
3158                 /* systemd might have droppped off momentarily, let's
3159                  * not make this an error */
3160                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3161                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3162                         return true;
3163
3164                 /* If the unit is already unloaded then it's not
3165                  * active */
3166                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3167                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3168                         return false;
3169
3170                 return r;
3171         }
3172
3173         r = sd_bus_message_read(reply, "s", &state);
3174         if (r < 0)
3175                 return -EINVAL;
3176
3177         return !streq(state, "inactive") && !streq(state, "failed");
3178 }
3179
3180 int manager_job_is_active(Manager *manager, const char *path) {
3181         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3182         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3183         int r;
3184
3185         assert(manager);
3186         assert(path);
3187
3188         r = sd_bus_get_property(
3189                         manager->bus,
3190                         "org.freedesktop.systemd1",
3191                         path,
3192                         "org.freedesktop.systemd1.Job",
3193                         "State",
3194                         &error,
3195                         &reply,
3196                         "s");
3197         if (r < 0) {
3198                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3199                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3200                         return true;
3201
3202                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3203                         return false;
3204
3205                 return r;
3206         }
3207
3208         /* We don't actually care about the state really. The fact
3209          * that we could read the job state is enough for us */
3210
3211         return true;
3212 }