src/login/logind-dbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <pwd.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7
   8 #include "sd-device.h"
   9 #include "sd-messages.h"
  10
  11 #include "alloc-util.h"
  12 #include "audit-util.h"
  13 #include "bus-common-errors.h"
  14 #include "bus-error.h"
  15 #include "bus-unit-util.h"
  16 #include "bus-util.h"
  17 #include "cgroup-util.h"
  18 #include "device-util.h"
  19 #include "dirent-util.h"
  20 #include "efivars.h"
  21 #include "escape.h"
  22 #include "fd-util.h"
  23 #include "fileio-label.h"
  24 #include "fileio.h"
  25 #include "format-util.h"
  26 #include "fs-util.h"
  27 #include "logind.h"
  28 #include "missing_capability.h"
  29 #include "mkdir.h"
  30 #include "path-util.h"
  31 #include "process-util.h"
  32 #include "selinux-util.h"
  33 #include "sleep-config.h"
  34 #include "special.h"
  35 #include "strv.h"
  36 #include "terminal-util.h"
  37 #include "tmpfile-util.h"
  38 #include "unit-name.h"
  39 #include "user-util.h"
  40 #include "utmp-wtmp.h"
  41
  42 static int get_sender_session(Manager *m, sd_bus_message *message, sd_bus_error *error, Session **ret) {
  43
  44         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  45         const char *name;
  46         Session *session;
  47         int r;
  48
  49         /* Get client login session.  This is not what you are looking for these days,
  50          * as apps may instead belong to a user service unit.  This includes terminal
  51          * emulators and hence command-line apps. */
  52         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  53         if (r < 0)
  54                 return r;
  55
  56         r = sd_bus_creds_get_session(creds, &name);
  57         if (r == -ENXIO)
  58                 goto err_no_session;
  59         if (r < 0)
  60                 return r;
  61
  62         session = hashmap_get(m->sessions, name);
  63         if (!session)
  64                 goto err_no_session;
  65
  66         *ret = session;
  67         return 0;
  68
  69 err_no_session:
  70         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
  71                                  "Caller does not belong to any known session");
  72 }
  73
  74 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  75         Session *session;
  76
  77         assert(m);
  78         assert(message);
  79         assert(ret);
  80
  81         if (isempty(name))
  82                 return get_sender_session(m, message, error, ret);
  83
  84         session = hashmap_get(m->sessions, name);
  85         if (!session)
  86                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  87
  88         *ret = session;
  89         return 0;
  90 }
  91
  92 static int get_sender_user(Manager *m, sd_bus_message *message, sd_bus_error *error, User **ret) {
  93
  94         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  95         uid_t uid;
  96         User *user;
  97         int r;
  98
  99         /* Note that we get the owner UID of the session, not the actual client UID here! */
 100         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 101         if (r < 0)
 102                 return r;
 103
 104         r = sd_bus_creds_get_owner_uid(creds, &uid);
 105         if (r == -ENXIO)
 106                 goto err_no_user;
 107         if (r < 0)
 108                 return r;
 109
 110         user = hashmap_get(m->users, UID_TO_PTR(uid));
 111         if (!user)
 112                 goto err_no_user;
 113
 114         *ret = user;
 115         return 0;
 116
 117 err_no_user:
 118         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "Caller does not belong to any logged in user or lingering user");
 119 }
 120
 121 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
 122         User *user;
 123
 124         assert(m);
 125         assert(message);
 126         assert(ret);
 127
 128         if (!uid_is_valid(uid))
 129                 return get_sender_user(m, message, error, ret);
 130
 131         user = hashmap_get(m->users, UID_TO_PTR(uid));
 132         if (!user)
 133                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "User ID "UID_FMT" is not logged in or lingering", uid);
 134
 135         *ret = user;
 136         return 0;
 137 }
 138
 139 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 140         Seat *seat;
 141         int r;
 142
 143         assert(m);
 144         assert(message);
 145         assert(ret);
 146
 147         if (isempty(name)) {
 148                 Session *session;
 149
 150                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 151                 if (r < 0)
 152                         return r;
 153
 154                 seat = session->seat;
 155                 if (!seat)
 156                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 157         } else {
 158                 seat = hashmap_get(m->seats, name);
 159                 if (!seat)
 160                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 161         }
 162
 163         *ret = seat;
 164         return 0;
 165 }
 166
 167 static int property_get_idle_hint(
 168                 sd_bus *bus,
 169                 const char *path,
 170                 const char *interface,
 171                 const char *property,
 172                 sd_bus_message *reply,
 173                 void *userdata,
 174                 sd_bus_error *error) {
 175
 176         Manager *m = userdata;
 177
 178         assert(bus);
 179         assert(reply);
 180         assert(m);
 181
 182         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 183 }
 184
 185 static int property_get_idle_since_hint(
 186                 sd_bus *bus,
 187                 const char *path,
 188                 const char *interface,
 189                 const char *property,
 190                 sd_bus_message *reply,
 191                 void *userdata,
 192                 sd_bus_error *error) {
 193
 194         Manager *m = userdata;
 195         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 196
 197         assert(bus);
 198         assert(reply);
 199         assert(m);
 200
 201         manager_get_idle_hint(m, &t);
 202
 203         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 204 }
 205
 206 static int property_get_inhibited(
 207                 sd_bus *bus,
 208                 const char *path,
 209                 const char *interface,
 210                 const char *property,
 211                 sd_bus_message *reply,
 212                 void *userdata,
 213                 sd_bus_error *error) {
 214
 215         Manager *m = userdata;
 216         InhibitWhat w;
 217
 218         assert(bus);
 219         assert(reply);
 220         assert(m);
 221
 222         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 223
 224         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 225 }
 226
 227 static int property_get_preparing(
 228                 sd_bus *bus,
 229                 const char *path,
 230                 const char *interface,
 231                 const char *property,
 232                 sd_bus_message *reply,
 233                 void *userdata,
 234                 sd_bus_error *error) {
 235
 236         Manager *m = userdata;
 237         bool b;
 238
 239         assert(bus);
 240         assert(reply);
 241         assert(m);
 242
 243         if (streq(property, "PreparingForShutdown"))
 244                 b = m->action_what & INHIBIT_SHUTDOWN;
 245         else
 246                 b = m->action_what & INHIBIT_SLEEP;
 247
 248         return sd_bus_message_append(reply, "b", b);
 249 }
 250
 251 static int property_get_scheduled_shutdown(
 252                 sd_bus *bus,
 253                 const char *path,
 254                 const char *interface,
 255                 const char *property,
 256                 sd_bus_message *reply,
 257                 void *userdata,
 258                 sd_bus_error *error) {
 259
 260         Manager *m = userdata;
 261         int r;
 262
 263         assert(bus);
 264         assert(reply);
 265         assert(m);
 266
 267         r = sd_bus_message_open_container(reply, 'r', "st");
 268         if (r < 0)
 269                 return r;
 270
 271         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 272         if (r < 0)
 273                 return r;
 274
 275         return sd_bus_message_close_container(reply);
 276 }
 277
 278 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 279 static BUS_DEFINE_PROPERTY_GET(property_get_docked, "b", Manager, manager_is_docked_or_external_displays);
 280 static BUS_DEFINE_PROPERTY_GET(property_get_lid_closed, "b", Manager, manager_is_lid_closed);
 281 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_on_external_power, "b", manager_is_on_external_power);
 282 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_compat_user_tasks_max, "t", CGROUP_LIMIT_MAX);
 283 static BUS_DEFINE_PROPERTY_GET_REF(property_get_hashmap_size, "t", Hashmap *, (uint64_t) hashmap_size);
 284
 285 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 286         _cleanup_free_ char *p = NULL;
 287         Manager *m = userdata;
 288         const char *name;
 289         Session *session;
 290         int r;
 291
 292         assert(message);
 293         assert(m);
 294
 295         r = sd_bus_message_read(message, "s", &name);
 296         if (r < 0)
 297                 return r;
 298
 299         r = manager_get_session_from_creds(m, message, name, error, &session);
 300         if (r < 0)
 301                 return r;
 302
 303         p = session_bus_path(session);
 304         if (!p)
 305                 return -ENOMEM;
 306
 307         return sd_bus_reply_method_return(message, "o", p);
 308 }
 309
 310 /* Get login session of a process.  This is not what you are looking for these days,
 311  * as apps may instead belong to a user service unit.  This includes terminal
 312  * emulators and hence command-line apps. */
 313 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 314         _cleanup_free_ char *p = NULL;
 315         Session *session = NULL;
 316         Manager *m = userdata;
 317         pid_t pid;
 318         int r;
 319
 320         assert(message);
 321         assert(m);
 322
 323         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 324
 325         r = sd_bus_message_read(message, "u", &pid);
 326         if (r < 0)
 327                 return r;
 328         if (pid < 0)
 329                 return -EINVAL;
 330
 331         if (pid == 0) {
 332                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 333                 if (r < 0)
 334                         return r;
 335         } else {
 336                 r = manager_get_session_by_pid(m, pid, &session);
 337                 if (r < 0)
 338                         return r;
 339
 340                 if (!session)
 341                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 342         }
 343
 344         p = session_bus_path(session);
 345         if (!p)
 346                 return -ENOMEM;
 347
 348         return sd_bus_reply_method_return(message, "o", p);
 349 }
 350
 351 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 352         _cleanup_free_ char *p = NULL;
 353         Manager *m = userdata;
 354         uint32_t uid;
 355         User *user;
 356         int r;
 357
 358         assert(message);
 359         assert(m);
 360
 361         r = sd_bus_message_read(message, "u", &uid);
 362         if (r < 0)
 363                 return r;
 364
 365         r = manager_get_user_from_creds(m, message, uid, error, &user);
 366         if (r < 0)
 367                 return r;
 368
 369         p = user_bus_path(user);
 370         if (!p)
 371                 return -ENOMEM;
 372
 373         return sd_bus_reply_method_return(message, "o", p);
 374 }
 375
 376 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 377         _cleanup_free_ char *p = NULL;
 378         Manager *m = userdata;
 379         User *user = NULL;
 380         pid_t pid;
 381         int r;
 382
 383         assert(message);
 384         assert(m);
 385
 386         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 387
 388         r = sd_bus_message_read(message, "u", &pid);
 389         if (r < 0)
 390                 return r;
 391         if (pid < 0)
 392                 return -EINVAL;
 393
 394         if (pid == 0) {
 395                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 396                 if (r < 0)
 397                         return r;
 398         } else {
 399                 r = manager_get_user_by_pid(m, pid, &user);
 400                 if (r < 0)
 401                         return r;
 402                 if (!user)
 403                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 404                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 405                                                  pid);
 406         }
 407
 408         p = user_bus_path(user);
 409         if (!p)
 410                 return -ENOMEM;
 411
 412         return sd_bus_reply_method_return(message, "o", p);
 413 }
 414
 415 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 416         _cleanup_free_ char *p = NULL;
 417         Manager *m = userdata;
 418         const char *name;
 419         Seat *seat;
 420         int r;
 421
 422         assert(message);
 423         assert(m);
 424
 425         r = sd_bus_message_read(message, "s", &name);
 426         if (r < 0)
 427                 return r;
 428
 429         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 430         if (r < 0)
 431                 return r;
 432
 433         p = seat_bus_path(seat);
 434         if (!p)
 435                 return -ENOMEM;
 436
 437         return sd_bus_reply_method_return(message, "o", p);
 438 }
 439
 440 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 441         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 442         Manager *m = userdata;
 443         Session *session;
 444         Iterator i;
 445         int r;
 446
 447         assert(message);
 448         assert(m);
 449
 450         r = sd_bus_message_new_method_return(message, &reply);
 451         if (r < 0)
 452                 return r;
 453
 454         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 455         if (r < 0)
 456                 return r;
 457
 458         HASHMAP_FOREACH(session, m->sessions, i) {
 459                 _cleanup_free_ char *p = NULL;
 460
 461                 p = session_bus_path(session);
 462                 if (!p)
 463                         return -ENOMEM;
 464
 465                 r = sd_bus_message_append(reply, "(susso)",
 466                                           session->id,
 467                                           (uint32_t) session->user->uid,
 468                                           session->user->name,
 469                                           session->seat ? session->seat->id : "",
 470                                           p);
 471                 if (r < 0)
 472                         return r;
 473         }
 474
 475         r = sd_bus_message_close_container(reply);
 476         if (r < 0)
 477                 return r;
 478
 479         return sd_bus_send(NULL, reply, NULL);
 480 }
 481
 482 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 483         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 484         Manager *m = userdata;
 485         User *user;
 486         Iterator i;
 487         int r;
 488
 489         assert(message);
 490         assert(m);
 491
 492         r = sd_bus_message_new_method_return(message, &reply);
 493         if (r < 0)
 494                 return r;
 495
 496         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 497         if (r < 0)
 498                 return r;
 499
 500         HASHMAP_FOREACH(user, m->users, i) {
 501                 _cleanup_free_ char *p = NULL;
 502
 503                 p = user_bus_path(user);
 504                 if (!p)
 505                         return -ENOMEM;
 506
 507                 r = sd_bus_message_append(reply, "(uso)",
 508                                           (uint32_t) user->uid,
 509                                           user->name,
 510                                           p);
 511                 if (r < 0)
 512                         return r;
 513         }
 514
 515         r = sd_bus_message_close_container(reply);
 516         if (r < 0)
 517                 return r;
 518
 519         return sd_bus_send(NULL, reply, NULL);
 520 }
 521
 522 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 523         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 524         Manager *m = userdata;
 525         Seat *seat;
 526         Iterator i;
 527         int r;
 528
 529         assert(message);
 530         assert(m);
 531
 532         r = sd_bus_message_new_method_return(message, &reply);
 533         if (r < 0)
 534                 return r;
 535
 536         r = sd_bus_message_open_container(reply, 'a', "(so)");
 537         if (r < 0)
 538                 return r;
 539
 540         HASHMAP_FOREACH(seat, m->seats, i) {
 541                 _cleanup_free_ char *p = NULL;
 542
 543                 p = seat_bus_path(seat);
 544                 if (!p)
 545                         return -ENOMEM;
 546
 547                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 548                 if (r < 0)
 549                         return r;
 550         }
 551
 552         r = sd_bus_message_close_container(reply);
 553         if (r < 0)
 554                 return r;
 555
 556         return sd_bus_send(NULL, reply, NULL);
 557 }
 558
 559 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 560         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 561         Manager *m = userdata;
 562         Inhibitor *inhibitor;
 563         Iterator i;
 564         int r;
 565
 566         assert(message);
 567         assert(m);
 568
 569         r = sd_bus_message_new_method_return(message, &reply);
 570         if (r < 0)
 571                 return r;
 572
 573         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 574         if (r < 0)
 575                 return r;
 576
 577         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 578
 579                 r = sd_bus_message_append(reply, "(ssssuu)",
 580                                           strempty(inhibit_what_to_string(inhibitor->what)),
 581                                           strempty(inhibitor->who),
 582                                           strempty(inhibitor->why),
 583                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 584                                           (uint32_t) inhibitor->uid,
 585                                           (uint32_t) inhibitor->pid);
 586                 if (r < 0)
 587                         return r;
 588         }
 589
 590         r = sd_bus_message_close_container(reply);
 591         if (r < 0)
 592                 return r;
 593
 594         return sd_bus_send(NULL, reply, NULL);
 595 }
 596
 597 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 598         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 599         _cleanup_free_ char *id = NULL;
 600         Session *session = NULL;
 601         uint32_t audit_id = 0;
 602         Manager *m = userdata;
 603         User *user = NULL;
 604         Seat *seat = NULL;
 605         pid_t leader;
 606         uid_t uid;
 607         int remote;
 608         uint32_t vtnr = 0;
 609         SessionType t;
 610         SessionClass c;
 611         int r;
 612
 613         assert(message);
 614         assert(m);
 615
 616         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 617         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 618
 619         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 620         if (r < 0)
 621                 return r;
 622
 623         if (!uid_is_valid(uid))
 624                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 625         if (leader < 0 || leader == 1 || leader == getpid_cached())
 626                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 627
 628         if (isempty(type))
 629                 t = _SESSION_TYPE_INVALID;
 630         else {
 631                 t = session_type_from_string(type);
 632                 if (t < 0)
 633                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 634         }
 635
 636         if (isempty(class))
 637                 c = _SESSION_CLASS_INVALID;
 638         else {
 639                 c = session_class_from_string(class);
 640                 if (c < 0)
 641                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 642         }
 643
 644         if (isempty(desktop))
 645                 desktop = NULL;
 646         else {
 647                 if (!string_is_safe(desktop))
 648                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 649         }
 650
 651         if (isempty(cseat))
 652                 seat = NULL;
 653         else {
 654                 seat = hashmap_get(m->seats, cseat);
 655                 if (!seat)
 656                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 657         }
 658
 659         if (tty_is_vc(tty)) {
 660                 int v;
 661
 662                 if (!seat)
 663                         seat = m->seat0;
 664                 else if (seat != m->seat0)
 665                         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);
 666
 667                 v = vtnr_from_tty(tty);
 668                 if (v <= 0)
 669                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 670
 671                 if (vtnr == 0)
 672                         vtnr = (uint32_t) v;
 673                 else if (vtnr != (uint32_t) v)
 674                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 675
 676         } else if (tty_is_console(tty)) {
 677
 678                 if (!seat)
 679                         seat = m->seat0;
 680                 else if (seat != m->seat0)
 681                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 682
 683                 if (vtnr != 0)
 684                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 685         }
 686
 687         if (seat) {
 688                 if (seat_has_vts(seat)) {
 689                         if (vtnr <= 0 || vtnr > 63)
 690                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 691                 } else {
 692                         if (vtnr != 0)
 693                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 694                 }
 695         }
 696
 697         if (t == _SESSION_TYPE_INVALID) {
 698                 if (!isempty(display))
 699                         t = SESSION_X11;
 700                 else if (!isempty(tty))
 701                         t = SESSION_TTY;
 702                 else
 703                         t = SESSION_UNSPECIFIED;
 704         }
 705
 706         if (c == _SESSION_CLASS_INVALID) {
 707                 if (t == SESSION_UNSPECIFIED)
 708                         c = SESSION_BACKGROUND;
 709                 else
 710                         c = SESSION_USER;
 711         }
 712
 713         if (leader == 0) {
 714                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 715
 716                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 717                 if (r < 0)
 718                         return r;
 719
 720                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 721                 if (r < 0)
 722                         return r;
 723         }
 724
 725         /* Check if we are already in a logind session. Or if we are in user@.service which is a special PAM session
 726          * that avoids creating a logind session. */
 727         r = manager_get_user_by_pid(m, leader, NULL);
 728         if (r < 0)
 729                 return r;
 730         if (r > 0)
 731                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session or user slice");
 732
 733         /*
 734          * Old gdm and lightdm start the user-session on the same VT as
 735          * the greeter session. But they destroy the greeter session
 736          * after the user-session and want the user-session to take
 737          * over the VT. We need to support this for
 738          * backwards-compatibility, so make sure we allow new sessions
 739          * on a VT that a greeter is running on. Furthermore, to allow
 740          * re-logins, we have to allow a greeter to take over a used VT for
 741          * the exact same reasons.
 742          */
 743         if (c != SESSION_GREETER &&
 744             vtnr > 0 &&
 745             vtnr < m->seat0->position_count &&
 746             m->seat0->positions[vtnr] &&
 747             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 748                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 749
 750         if (hashmap_size(m->sessions) >= m->sessions_max)
 751                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 752
 753         (void) audit_session_from_pid(leader, &audit_id);
 754         if (audit_session_is_valid(audit_id)) {
 755                 /* Keep our session IDs and the audit session IDs in sync */
 756
 757                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 758                         return -ENOMEM;
 759
 760                 /* Wut? There's already a session by this name and we
 761                  * didn't find it above? Weird, then let's not trust
 762                  * the audit data and let's better register a new
 763                  * ID */
 764                 if (hashmap_get(m->sessions, id)) {
 765                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 766                         audit_id = AUDIT_SESSION_INVALID;
 767                         id = mfree(id);
 768                 }
 769         }
 770
 771         if (!id) {
 772                 do {
 773                         id = mfree(id);
 774
 775                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 776                                 return -ENOMEM;
 777
 778                 } while (hashmap_get(m->sessions, id));
 779         }
 780
 781         /* If we are not watching utmp aleady, try again */
 782         manager_reconnect_utmp(m);
 783
 784         r = manager_add_user_by_uid(m, uid, &user);
 785         if (r < 0)
 786                 goto fail;
 787
 788         r = manager_add_session(m, id, &session);
 789         if (r < 0)
 790                 goto fail;
 791
 792         session_set_user(session, user);
 793         session_set_leader(session, leader);
 794
 795         session->type = t;
 796         session->class = c;
 797         session->remote = remote;
 798         session->vtnr = vtnr;
 799
 800         if (!isempty(tty)) {
 801                 session->tty = strdup(tty);
 802                 if (!session->tty) {
 803                         r = -ENOMEM;
 804                         goto fail;
 805                 }
 806
 807                 session->tty_validity = TTY_FROM_PAM;
 808         }
 809
 810         if (!isempty(display)) {
 811                 session->display = strdup(display);
 812                 if (!session->display) {
 813                         r = -ENOMEM;
 814                         goto fail;
 815                 }
 816         }
 817
 818         if (!isempty(remote_user)) {
 819                 session->remote_user = strdup(remote_user);
 820                 if (!session->remote_user) {
 821                         r = -ENOMEM;
 822                         goto fail;
 823                 }
 824         }
 825
 826         if (!isempty(remote_host)) {
 827                 session->remote_host = strdup(remote_host);
 828                 if (!session->remote_host) {
 829                         r = -ENOMEM;
 830                         goto fail;
 831                 }
 832         }
 833
 834         if (!isempty(service)) {
 835                 session->service = strdup(service);
 836                 if (!session->service) {
 837                         r = -ENOMEM;
 838                         goto fail;
 839                 }
 840         }
 841
 842         if (!isempty(desktop)) {
 843                 session->desktop = strdup(desktop);
 844                 if (!session->desktop) {
 845                         r = -ENOMEM;
 846                         goto fail;
 847                 }
 848         }
 849
 850         if (seat) {
 851                 r = seat_attach_session(seat, session);
 852                 if (r < 0)
 853                         goto fail;
 854         }
 855
 856         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 857         if (r < 0)
 858                 goto fail;
 859
 860         r = session_start(session, message, error);
 861         if (r < 0)
 862                 goto fail;
 863
 864         r = sd_bus_message_exit_container(message);
 865         if (r < 0)
 866                 goto fail;
 867
 868         session->create_message = sd_bus_message_ref(message);
 869
 870         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 871          * session_send_create_reply(). */
 872
 873         return 1;
 874
 875 fail:
 876         if (session)
 877                 session_add_to_gc_queue(session);
 878
 879         if (user)
 880                 user_add_to_gc_queue(user);
 881
 882         return r;
 883 }
 884
 885 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 886         Manager *m = userdata;
 887         Session *session;
 888         const char *name;
 889         int r;
 890
 891         assert(message);
 892         assert(m);
 893
 894         r = sd_bus_message_read(message, "s", &name);
 895         if (r < 0)
 896                 return r;
 897
 898         r = manager_get_session_from_creds(m, message, name, error, &session);
 899         if (r < 0)
 900                 return r;
 901
 902         r = session_release(session);
 903         if (r < 0)
 904                 return r;
 905
 906         return sd_bus_reply_method_return(message, NULL);
 907 }
 908
 909 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 910         Manager *m = userdata;
 911         Session *session;
 912         const char *name;
 913         int r;
 914
 915         assert(message);
 916         assert(m);
 917
 918         r = sd_bus_message_read(message, "s", &name);
 919         if (r < 0)
 920                 return r;
 921
 922         r = manager_get_session_from_creds(m, message, name, error, &session);
 923         if (r < 0)
 924                 return r;
 925
 926         return bus_session_method_activate(message, session, error);
 927 }
 928
 929 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 930         const char *session_name, *seat_name;
 931         Manager *m = userdata;
 932         Session *session;
 933         Seat *seat;
 934         int r;
 935
 936         assert(message);
 937         assert(m);
 938
 939         /* Same as ActivateSession() but refuses to work if
 940          * the seat doesn't match */
 941
 942         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 943         if (r < 0)
 944                 return r;
 945
 946         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 947         if (r < 0)
 948                 return r;
 949
 950         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 951         if (r < 0)
 952                 return r;
 953
 954         if (session->seat != seat)
 955                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 956
 957         r = session_activate(session);
 958         if (r < 0)
 959                 return r;
 960
 961         return sd_bus_reply_method_return(message, NULL);
 962 }
 963
 964 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 965         Manager *m = userdata;
 966         Session *session;
 967         const char *name;
 968         int r;
 969
 970         assert(message);
 971         assert(m);
 972
 973         r = sd_bus_message_read(message, "s", &name);
 974         if (r < 0)
 975                 return r;
 976
 977         r = manager_get_session_from_creds(m, message, name, error, &session);
 978         if (r < 0)
 979                 return r;
 980
 981         return bus_session_method_lock(message, session, error);
 982 }
 983
 984 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 985         Manager *m = userdata;
 986         int r;
 987
 988         assert(message);
 989         assert(m);
 990
 991         r = bus_verify_polkit_async(
 992                         message,
 993                         CAP_SYS_ADMIN,
 994                         "org.freedesktop.login1.lock-sessions",
 995                         NULL,
 996                         false,
 997                         UID_INVALID,
 998                         &m->polkit_registry,
 999                         error);
1000         if (r < 0)
1001                 return r;
1002         if (r == 0)
1003                 return 1; /* Will call us back */
1004
1005         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1006         if (r < 0)
1007                 return r;
1008
1009         return sd_bus_reply_method_return(message, NULL);
1010 }
1011
1012 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1013         const char *name;
1014         Manager *m = userdata;
1015         Session *session;
1016         int r;
1017
1018         assert(message);
1019         assert(m);
1020
1021         r = sd_bus_message_read(message, "s", &name);
1022         if (r < 0)
1023                 return r;
1024
1025         r = manager_get_session_from_creds(m, message, name, error, &session);
1026         if (r < 0)
1027                 return r;
1028
1029         return bus_session_method_kill(message, session, error);
1030 }
1031
1032 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1033         Manager *m = userdata;
1034         uint32_t uid;
1035         User *user;
1036         int r;
1037
1038         assert(message);
1039         assert(m);
1040
1041         r = sd_bus_message_read(message, "u", &uid);
1042         if (r < 0)
1043                 return r;
1044
1045         r = manager_get_user_from_creds(m, message, uid, error, &user);
1046         if (r < 0)
1047                 return r;
1048
1049         return bus_user_method_kill(message, user, error);
1050 }
1051
1052 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1053         Manager *m = userdata;
1054         const char *name;
1055         Session *session;
1056         int r;
1057
1058         assert(message);
1059         assert(m);
1060
1061         r = sd_bus_message_read(message, "s", &name);
1062         if (r < 0)
1063                 return r;
1064
1065         r = manager_get_session_from_creds(m, message, name, error, &session);
1066         if (r < 0)
1067                 return r;
1068
1069         return bus_session_method_terminate(message, session, error);
1070 }
1071
1072 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1073         Manager *m = userdata;
1074         uint32_t uid;
1075         User *user;
1076         int r;
1077
1078         assert(message);
1079         assert(m);
1080
1081         r = sd_bus_message_read(message, "u", &uid);
1082         if (r < 0)
1083                 return r;
1084
1085         r = manager_get_user_from_creds(m, message, uid, error, &user);
1086         if (r < 0)
1087                 return r;
1088
1089         return bus_user_method_terminate(message, user, error);
1090 }
1091
1092 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1093         Manager *m = userdata;
1094         const char *name;
1095         Seat *seat;
1096         int r;
1097
1098         assert(message);
1099         assert(m);
1100
1101         r = sd_bus_message_read(message, "s", &name);
1102         if (r < 0)
1103                 return r;
1104
1105         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1106         if (r < 0)
1107                 return r;
1108
1109         return bus_seat_method_terminate(message, seat, error);
1110 }
1111
1112 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1113         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1114         _cleanup_free_ char *cc = NULL;
1115         Manager *m = userdata;
1116         int r, b, interactive;
1117         struct passwd *pw;
1118         const char *path;
1119         uint32_t uid, auth_uid;
1120
1121         assert(message);
1122         assert(m);
1123
1124         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1125         if (r < 0)
1126                 return r;
1127
1128         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1129                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1130         if (r < 0)
1131                 return r;
1132
1133         if (!uid_is_valid(uid)) {
1134                 /* Note that we get the owner UID of the session or user unit,
1135                  * not the actual client UID here! */
1136                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1137                 if (r < 0)
1138                         return r;
1139         }
1140
1141         /* owner_uid is racy, so for authorization we must use euid */
1142         r = sd_bus_creds_get_euid(creds, &auth_uid);
1143         if (r < 0)
1144                 return r;
1145
1146         errno = 0;
1147         pw = getpwuid(uid);
1148         if (!pw)
1149                 return errno > 0 ? -errno : -ENOENT;
1150
1151         r = bus_verify_polkit_async(
1152                         message,
1153                         CAP_SYS_ADMIN,
1154                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1155                                           "org.freedesktop.login1.set-user-linger",
1156                         NULL,
1157                         interactive,
1158                         UID_INVALID,
1159                         &m->polkit_registry,
1160                         error);
1161         if (r < 0)
1162                 return r;
1163         if (r == 0)
1164                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1165
1166         mkdir_p_label("/var/lib/systemd", 0755);
1167
1168         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1169         if (r < 0)
1170                 return r;
1171
1172         cc = cescape(pw->pw_name);
1173         if (!cc)
1174                 return -ENOMEM;
1175
1176         path = strjoina("/var/lib/systemd/linger/", cc);
1177         if (b) {
1178                 User *u;
1179
1180                 r = touch(path);
1181                 if (r < 0)
1182                         return r;
1183
1184                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1185                         user_start(u);
1186
1187         } else {
1188                 User *u;
1189
1190                 r = unlink(path);
1191                 if (r < 0 && errno != ENOENT)
1192                         return -errno;
1193
1194                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1195                 if (u)
1196                         user_add_to_gc_queue(u);
1197         }
1198
1199         return sd_bus_reply_method_return(message, NULL);
1200 }
1201
1202 static int trigger_device(Manager *m, sd_device *d) {
1203         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
1204         int r;
1205
1206         assert(m);
1207
1208         r = sd_device_enumerator_new(&e);
1209         if (r < 0)
1210                 return r;
1211
1212         r = sd_device_enumerator_allow_uninitialized(e);
1213         if (r < 0)
1214                 return r;
1215
1216         if (d) {
1217                 r = sd_device_enumerator_add_match_parent(e, d);
1218                 if (r < 0)
1219                         return r;
1220         }
1221
1222         FOREACH_DEVICE(e, d) {
1223                 _cleanup_free_ char *t = NULL;
1224                 const char *p;
1225
1226                 r = sd_device_get_syspath(d, &p);
1227                 if (r < 0)
1228                         return r;
1229
1230                 t = strappend(p, "/uevent");
1231                 if (!t)
1232                         return -ENOMEM;
1233
1234                 (void) write_string_file(t, "change", WRITE_STRING_FILE_DISABLE_BUFFER);
1235         }
1236
1237         return 0;
1238 }
1239
1240 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1241         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
1242         _cleanup_free_ char *rule = NULL, *file = NULL;
1243         const char *id_for_seat;
1244         int r;
1245
1246         assert(m);
1247         assert(seat);
1248         assert(sysfs);
1249
1250         r = sd_device_new_from_syspath(&d, sysfs);
1251         if (r < 0)
1252                 return r;
1253
1254         if (sd_device_has_tag(d, "seat") <= 0)
1255                 return -ENODEV;
1256
1257         if (sd_device_get_property_value(d, "ID_FOR_SEAT", &id_for_seat) < 0)
1258                 return -ENODEV;
1259
1260         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1261                 return -ENOMEM;
1262
1263         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1264                 return -ENOMEM;
1265
1266         (void) mkdir_p_label("/etc/udev/rules.d", 0755);
1267         r = write_string_file_atomic_label(file, rule);
1268         if (r < 0)
1269                 return r;
1270
1271         return trigger_device(m, d);
1272 }
1273
1274 static int flush_devices(Manager *m) {
1275         _cleanup_closedir_ DIR *d;
1276
1277         assert(m);
1278
1279         d = opendir("/etc/udev/rules.d");
1280         if (!d) {
1281                 if (errno != ENOENT)
1282                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1283         } else {
1284                 struct dirent *de;
1285
1286                 FOREACH_DIRENT_ALL(de, d, break) {
1287                         if (!dirent_is_file(de))
1288                                 continue;
1289
1290                         if (!startswith(de->d_name, "72-seat-"))
1291                                 continue;
1292
1293                         if (!endswith(de->d_name, ".rules"))
1294                                 continue;
1295
1296                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1297                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1298                 }
1299         }
1300
1301         return trigger_device(m, NULL);
1302 }
1303
1304 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1305         const char *sysfs, *seat;
1306         Manager *m = userdata;
1307         int interactive, r;
1308
1309         assert(message);
1310         assert(m);
1311
1312         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1313         if (r < 0)
1314                 return r;
1315
1316         if (!path_startswith(sysfs, "/sys"))
1317                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1318
1319         if (!seat_name_is_valid(seat))
1320                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1321
1322         r = bus_verify_polkit_async(
1323                         message,
1324                         CAP_SYS_ADMIN,
1325                         "org.freedesktop.login1.attach-device",
1326                         NULL,
1327                         interactive,
1328                         UID_INVALID,
1329                         &m->polkit_registry,
1330                         error);
1331         if (r < 0)
1332                 return r;
1333         if (r == 0)
1334                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1335
1336         r = attach_device(m, seat, sysfs);
1337         if (r < 0)
1338                 return r;
1339
1340         return sd_bus_reply_method_return(message, NULL);
1341 }
1342
1343 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1344         Manager *m = userdata;
1345         int interactive, r;
1346
1347         assert(message);
1348         assert(m);
1349
1350         r = sd_bus_message_read(message, "b", &interactive);
1351         if (r < 0)
1352                 return r;
1353
1354         r = bus_verify_polkit_async(
1355                         message,
1356                         CAP_SYS_ADMIN,
1357                         "org.freedesktop.login1.flush-devices",
1358                         NULL,
1359                         interactive,
1360                         UID_INVALID,
1361                         &m->polkit_registry,
1362                         error);
1363         if (r < 0)
1364                 return r;
1365         if (r == 0)
1366                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1367
1368         r = flush_devices(m);
1369         if (r < 0)
1370                 return r;
1371
1372         return sd_bus_reply_method_return(message, NULL);
1373 }
1374
1375 static int have_multiple_sessions(
1376                 Manager *m,
1377                 uid_t uid) {
1378
1379         Session *session;
1380         Iterator i;
1381
1382         assert(m);
1383
1384         /* Check for other users' sessions. Greeter sessions do not
1385          * count, and non-login sessions do not count either. */
1386         HASHMAP_FOREACH(session, m->sessions, i)
1387                 if (session->class == SESSION_USER &&
1388                     session->user->uid != uid)
1389                         return true;
1390
1391         return false;
1392 }
1393
1394 static int bus_manager_log_shutdown(
1395                 Manager *m,
1396                 const char *unit_name) {
1397
1398         const char *p, *q;
1399
1400         assert(m);
1401         assert(unit_name);
1402
1403         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1404                 p = "MESSAGE=System is powering down";
1405                 q = "SHUTDOWN=power-off";
1406         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1407                 p = "MESSAGE=System is rebooting";
1408                 q = "SHUTDOWN=reboot";
1409         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1410                 p = "MESSAGE=System is halting";
1411                 q = "SHUTDOWN=halt";
1412         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1413                 p = "MESSAGE=System is rebooting with kexec";
1414                 q = "SHUTDOWN=kexec";
1415         } else {
1416                 p = "MESSAGE=System is shutting down";
1417                 q = NULL;
1418         }
1419
1420         if (isempty(m->wall_message))
1421                 p = strjoina(p, ".");
1422         else
1423                 p = strjoina(p, " (", m->wall_message, ").");
1424
1425         return log_struct(LOG_NOTICE,
1426                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1427                           p,
1428                           q);
1429 }
1430
1431 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1432         Manager *m = userdata;
1433
1434         assert(e);
1435         assert(m);
1436
1437         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1438         return 0;
1439 }
1440
1441 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1442         int r;
1443
1444         assert(m);
1445
1446         if (until <= now(CLOCK_MONOTONIC))
1447                 return 0;
1448
1449         /* We want to ignore the lid switch for a while after each
1450          * suspend, and after boot-up. Hence let's install a timer for
1451          * this. As long as the event source exists we ignore the lid
1452          * switch. */
1453
1454         if (m->lid_switch_ignore_event_source) {
1455                 usec_t u;
1456
1457                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1458                 if (r < 0)
1459                         return r;
1460
1461                 if (until <= u)
1462                         return 0;
1463
1464                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1465         } else
1466                 r = sd_event_add_time(
1467                                 m->event,
1468                                 &m->lid_switch_ignore_event_source,
1469                                 CLOCK_MONOTONIC,
1470                                 until, 0,
1471                                 lid_switch_ignore_handler, m);
1472
1473         return r;
1474 }
1475
1476 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1477
1478         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1479                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1480                 [INHIBIT_SLEEP] = "PrepareForSleep"
1481         };
1482
1483         int active = _active;
1484
1485         assert(m);
1486         assert(w >= 0);
1487         assert(w < _INHIBIT_WHAT_MAX);
1488         assert(signal_name[w]);
1489
1490         return sd_bus_emit_signal(m->bus,
1491                                   "/org/freedesktop/login1",
1492                                   "org.freedesktop.login1.Manager",
1493                                   signal_name[w],
1494                                   "b",
1495                                   active);
1496 }
1497
1498 static int execute_shutdown_or_sleep(
1499                 Manager *m,
1500                 InhibitWhat w,
1501                 const char *unit_name,
1502                 sd_bus_error *error) {
1503
1504         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1505         char *c = NULL;
1506         const char *p;
1507         int r;
1508
1509         assert(m);
1510         assert(w > 0);
1511         assert(w < _INHIBIT_WHAT_MAX);
1512         assert(unit_name);
1513
1514         if (w == INHIBIT_SHUTDOWN)
1515                 bus_manager_log_shutdown(m, unit_name);
1516
1517         r = sd_bus_call_method(
1518                         m->bus,
1519                         "org.freedesktop.systemd1",
1520                         "/org/freedesktop/systemd1",
1521                         "org.freedesktop.systemd1.Manager",
1522                         "StartUnit",
1523                         error,
1524                         &reply,
1525                         "ss", unit_name, "replace-irreversibly");
1526         if (r < 0)
1527                 goto error;
1528
1529         r = sd_bus_message_read(reply, "o", &p);
1530         if (r < 0)
1531                 goto error;
1532
1533         c = strdup(p);
1534         if (!c) {
1535                 r = -ENOMEM;
1536                 goto error;
1537         }
1538
1539         m->action_unit = unit_name;
1540         free(m->action_job);
1541         m->action_job = c;
1542         m->action_what = w;
1543
1544         /* Make sure the lid switch is ignored for a while */
1545         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1546
1547         return 0;
1548
1549 error:
1550         /* Tell people that they now may take a lock again */
1551         (void) send_prepare_for(m, w, false);
1552
1553         return r;
1554 }
1555
1556 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1557
1558         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1559         Inhibitor *offending = NULL;
1560         int r;
1561
1562         assert(manager);
1563
1564         if (manager->action_what == 0 || manager->action_job)
1565                 return 0;
1566
1567         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1568                 _cleanup_free_ char *comm = NULL, *u = NULL;
1569
1570                 if (!timeout)
1571                         return 0;
1572
1573                 (void) get_process_comm(offending->pid, &comm);
1574                 u = uid_to_name(offending->uid);
1575
1576                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1577                            offending->uid, strna(u),
1578                            offending->pid, strna(comm));
1579         }
1580
1581         /* Actually do the operation */
1582         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1583         if (r < 0) {
1584                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1585                             bus_error_message(&error, r));
1586
1587                 manager->action_unit = NULL;
1588                 manager->action_what = 0;
1589                 return r;
1590         }
1591
1592         return 1;
1593 }
1594
1595 static int manager_inhibit_timeout_handler(
1596                         sd_event_source *s,
1597                         uint64_t usec,
1598                         void *userdata) {
1599
1600         Manager *manager = userdata;
1601         int r;
1602
1603         assert(manager);
1604         assert(manager->inhibit_timeout_source == s);
1605
1606         r = manager_dispatch_delayed(manager, true);
1607         return (r < 0) ? r : 0;
1608 }
1609
1610 static int delay_shutdown_or_sleep(
1611                 Manager *m,
1612                 InhibitWhat w,
1613                 const char *unit_name) {
1614
1615         int r;
1616         usec_t timeout_val;
1617
1618         assert(m);
1619         assert(w >= 0);
1620         assert(w < _INHIBIT_WHAT_MAX);
1621         assert(unit_name);
1622
1623         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1624
1625         if (m->inhibit_timeout_source) {
1626                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1627                 if (r < 0)
1628                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1629
1630                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1631                 if (r < 0)
1632                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1633         } else {
1634                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1635                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1636                 if (r < 0)
1637                         return r;
1638         }
1639
1640         m->action_unit = unit_name;
1641         m->action_what = w;
1642
1643         return 0;
1644 }
1645
1646 int bus_manager_shutdown_or_sleep_now_or_later(
1647                 Manager *m,
1648                 const char *unit_name,
1649                 InhibitWhat w,
1650                 sd_bus_error *error) {
1651
1652         _cleanup_free_ char *load_state = NULL;
1653         bool delayed;
1654         int r;
1655
1656         assert(m);
1657         assert(unit_name);
1658         assert(w > 0);
1659         assert(w <= _INHIBIT_WHAT_MAX);
1660         assert(!m->action_job);
1661
1662         r = unit_load_state(m->bus, unit_name, &load_state);
1663         if (r < 0)
1664                 return r;
1665
1666         if (!streq(load_state, "loaded"))
1667                 return log_notice_errno(SYNTHETIC_ERRNO(EACCES),
1668                                         "Unit %s is %s, refusing operation.",
1669                                         unit_name, load_state);
1670
1671         /* Tell everybody to prepare for shutdown/sleep */
1672         (void) send_prepare_for(m, w, true);
1673
1674         delayed =
1675                 m->inhibit_delay_max > 0 &&
1676                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1677
1678         if (delayed)
1679                 /* Shutdown is delayed, keep in mind what we
1680                  * want to do, and start a timeout */
1681                 r = delay_shutdown_or_sleep(m, w, unit_name);
1682         else
1683                 /* Shutdown is not delayed, execute it
1684                  * immediately */
1685                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1686
1687         return r;
1688 }
1689
1690 static int verify_shutdown_creds(
1691                 Manager *m,
1692                 sd_bus_message *message,
1693                 InhibitWhat w,
1694                 bool interactive,
1695                 const char *action,
1696                 const char *action_multiple_sessions,
1697                 const char *action_ignore_inhibit,
1698                 sd_bus_error *error) {
1699
1700         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1701         bool multiple_sessions, blocked;
1702         uid_t uid;
1703         int r;
1704
1705         assert(m);
1706         assert(message);
1707         assert(w >= 0);
1708         assert(w <= _INHIBIT_WHAT_MAX);
1709
1710         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1711         if (r < 0)
1712                 return r;
1713
1714         r = sd_bus_creds_get_euid(creds, &uid);
1715         if (r < 0)
1716                 return r;
1717
1718         r = have_multiple_sessions(m, uid);
1719         if (r < 0)
1720                 return r;
1721
1722         multiple_sessions = r > 0;
1723         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1724
1725         if (multiple_sessions && action_multiple_sessions) {
1726                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1727                 if (r < 0)
1728                         return r;
1729                 if (r == 0)
1730                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1731         }
1732
1733         if (blocked && action_ignore_inhibit) {
1734                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1735                 if (r < 0)
1736                         return r;
1737                 if (r == 0)
1738                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1739         }
1740
1741         if (!multiple_sessions && !blocked && action) {
1742                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1743                 if (r < 0)
1744                         return r;
1745                 if (r == 0)
1746                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1747         }
1748
1749         return 0;
1750 }
1751
1752 static int method_do_shutdown_or_sleep(
1753                 Manager *m,
1754                 sd_bus_message *message,
1755                 const char *unit_name,
1756                 InhibitWhat w,
1757                 const char *action,
1758                 const char *action_multiple_sessions,
1759                 const char *action_ignore_inhibit,
1760                 const char *sleep_verb,
1761                 sd_bus_error *error) {
1762
1763         int interactive, r;
1764
1765         assert(m);
1766         assert(message);
1767         assert(unit_name);
1768         assert(w >= 0);
1769         assert(w <= _INHIBIT_WHAT_MAX);
1770
1771         r = sd_bus_message_read(message, "b", &interactive);
1772         if (r < 0)
1773                 return r;
1774
1775         /* Don't allow multiple jobs being executed at the same time */
1776         if (m->action_what)
1777                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1778
1779         if (sleep_verb) {
1780                 r = can_sleep(sleep_verb);
1781                 if (r == -ENOSPC)
1782                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1783                                                 "Not enough swap space for hibernation");
1784                 if (r == 0)
1785                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1786                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1787                 if (r < 0)
1788                         return r;
1789         }
1790
1791         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1792                                   action_ignore_inhibit, error);
1793         if (r != 0)
1794                 return r;
1795
1796         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1797         if (r < 0)
1798                 return r;
1799
1800         return sd_bus_reply_method_return(message, NULL);
1801 }
1802
1803 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1804         Manager *m = userdata;
1805
1806         return method_do_shutdown_or_sleep(
1807                         m, message,
1808                         SPECIAL_POWEROFF_TARGET,
1809                         INHIBIT_SHUTDOWN,
1810                         "org.freedesktop.login1.power-off",
1811                         "org.freedesktop.login1.power-off-multiple-sessions",
1812                         "org.freedesktop.login1.power-off-ignore-inhibit",
1813                         NULL,
1814                         error);
1815 }
1816
1817 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1818         Manager *m = userdata;
1819
1820         return method_do_shutdown_or_sleep(
1821                         m, message,
1822                         SPECIAL_REBOOT_TARGET,
1823                         INHIBIT_SHUTDOWN,
1824                         "org.freedesktop.login1.reboot",
1825                         "org.freedesktop.login1.reboot-multiple-sessions",
1826                         "org.freedesktop.login1.reboot-ignore-inhibit",
1827                         NULL,
1828                         error);
1829 }
1830
1831 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1832         Manager *m = userdata;
1833
1834         return method_do_shutdown_or_sleep(
1835                         m, message,
1836                         SPECIAL_HALT_TARGET,
1837                         INHIBIT_SHUTDOWN,
1838                         "org.freedesktop.login1.halt",
1839                         "org.freedesktop.login1.halt-multiple-sessions",
1840                         "org.freedesktop.login1.halt-ignore-inhibit",
1841                         NULL,
1842                         error);
1843 }
1844
1845 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1846         Manager *m = userdata;
1847
1848         return method_do_shutdown_or_sleep(
1849                         m, message,
1850                         SPECIAL_SUSPEND_TARGET,
1851                         INHIBIT_SLEEP,
1852                         "org.freedesktop.login1.suspend",
1853                         "org.freedesktop.login1.suspend-multiple-sessions",
1854                         "org.freedesktop.login1.suspend-ignore-inhibit",
1855                         "suspend",
1856                         error);
1857 }
1858
1859 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1860         Manager *m = userdata;
1861
1862         return method_do_shutdown_or_sleep(
1863                         m, message,
1864                         SPECIAL_HIBERNATE_TARGET,
1865                         INHIBIT_SLEEP,
1866                         "org.freedesktop.login1.hibernate",
1867                         "org.freedesktop.login1.hibernate-multiple-sessions",
1868                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1869                         "hibernate",
1870                         error);
1871 }
1872
1873 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1874         Manager *m = userdata;
1875
1876         return method_do_shutdown_or_sleep(
1877                         m, message,
1878                         SPECIAL_HYBRID_SLEEP_TARGET,
1879                         INHIBIT_SLEEP,
1880                         "org.freedesktop.login1.hibernate",
1881                         "org.freedesktop.login1.hibernate-multiple-sessions",
1882                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1883                         "hybrid-sleep",
1884                         error);
1885 }
1886
1887 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1888         Manager *m = userdata;
1889
1890         return method_do_shutdown_or_sleep(
1891                         m, message,
1892                         SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
1893                         INHIBIT_SLEEP,
1894                         "org.freedesktop.login1.hibernate",
1895                         "org.freedesktop.login1.hibernate-multiple-sessions",
1896                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1897                         "hybrid-sleep",
1898                         error);
1899 }
1900
1901 static int nologin_timeout_handler(
1902                         sd_event_source *s,
1903                         uint64_t usec,
1904                         void *userdata) {
1905
1906         Manager *m = userdata;
1907
1908         log_info("Creating /run/nologin, blocking further logins...");
1909
1910         m->unlink_nologin =
1911                 create_shutdown_run_nologin_or_warn() >= 0;
1912
1913         return 0;
1914 }
1915
1916 static int update_schedule_file(Manager *m) {
1917         _cleanup_free_ char *temp_path = NULL;
1918         _cleanup_fclose_ FILE *f = NULL;
1919         int r;
1920
1921         assert(m);
1922
1923         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
1924         if (r < 0)
1925                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1926
1927         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1928         if (r < 0)
1929                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1930
1931         (void) fchmod(fileno(f), 0644);
1932
1933         fprintf(f,
1934                 "USEC="USEC_FMT"\n"
1935                 "WARN_WALL=%i\n"
1936                 "MODE=%s\n",
1937                 m->scheduled_shutdown_timeout,
1938                 m->enable_wall_messages,
1939                 m->scheduled_shutdown_type);
1940
1941         if (!isempty(m->wall_message)) {
1942                 _cleanup_free_ char *t;
1943
1944                 t = cescape(m->wall_message);
1945                 if (!t) {
1946                         r = -ENOMEM;
1947                         goto fail;
1948                 }
1949
1950                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1951         }
1952
1953         r = fflush_and_check(f);
1954         if (r < 0)
1955                 goto fail;
1956
1957         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1958                 r = -errno;
1959                 goto fail;
1960         }
1961
1962         return 0;
1963
1964 fail:
1965         (void) unlink(temp_path);
1966         (void) unlink("/run/systemd/shutdown/scheduled");
1967
1968         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
1969 }
1970
1971 static void reset_scheduled_shutdown(Manager *m) {
1972         assert(m);
1973
1974         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1975         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1976         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1977
1978         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1979         m->scheduled_shutdown_timeout = 0;
1980         m->shutdown_dry_run = false;
1981
1982         if (m->unlink_nologin) {
1983                 (void) unlink_or_warn("/run/nologin");
1984                 m->unlink_nologin = false;
1985         }
1986
1987         (void) unlink("/run/systemd/shutdown/scheduled");
1988 }
1989
1990 static int manager_scheduled_shutdown_handler(
1991                         sd_event_source *s,
1992                         uint64_t usec,
1993                         void *userdata) {
1994
1995         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1996         Manager *m = userdata;
1997         const char *target;
1998         int r;
1999
2000         assert(m);
2001
2002         if (isempty(m->scheduled_shutdown_type))
2003                 return 0;
2004
2005         if (streq(m->scheduled_shutdown_type, "poweroff"))
2006                 target = SPECIAL_POWEROFF_TARGET;
2007         else if (streq(m->scheduled_shutdown_type, "reboot"))
2008                 target = SPECIAL_REBOOT_TARGET;
2009         else if (streq(m->scheduled_shutdown_type, "halt"))
2010                 target = SPECIAL_HALT_TARGET;
2011         else
2012                 assert_not_reached("unexpected shutdown type");
2013
2014         /* Don't allow multiple jobs being executed at the same time */
2015         if (m->action_what) {
2016                 r = -EALREADY;
2017                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2018                 goto error;
2019         }
2020
2021         if (m->shutdown_dry_run) {
2022                 /* We do not process delay inhibitors here.  Otherwise, we
2023                  * would have to be considered "in progress" (like the check
2024                  * above) for some seconds after our admin has seen the final
2025                  * wall message. */
2026
2027                 bus_manager_log_shutdown(m, target);
2028                 log_info("Running in dry run, suppressing action.");
2029                 reset_scheduled_shutdown(m);
2030
2031                 return 0;
2032         }
2033
2034         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2035         if (r < 0) {
2036                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2037                 goto error;
2038         }
2039
2040         return 0;
2041
2042 error:
2043         reset_scheduled_shutdown(m);
2044         return r;
2045 }
2046
2047 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2048         Manager *m = userdata;
2049         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2050         const char *action_multiple_sessions = NULL;
2051         const char *action_ignore_inhibit = NULL;
2052         const char *action = NULL;
2053         uint64_t elapse;
2054         char *type;
2055         int r;
2056         bool dry_run = false;
2057
2058         assert(m);
2059         assert(message);
2060
2061         r = sd_bus_message_read(message, "st", &type, &elapse);
2062         if (r < 0)
2063                 return r;
2064
2065         if (startswith(type, "dry-")) {
2066                 type += 4;
2067                 dry_run = true;
2068         }
2069
2070         if (streq(type, "poweroff")) {
2071                 action = "org.freedesktop.login1.power-off";
2072                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2073                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2074         } else if (streq(type, "reboot")) {
2075                 action = "org.freedesktop.login1.reboot";
2076                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2077                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2078         } else if (streq(type, "halt")) {
2079                 action = "org.freedesktop.login1.halt";
2080                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2081                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2082         } else
2083                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2084
2085         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2086                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2087         if (r != 0)
2088                 return r;
2089
2090         if (m->scheduled_shutdown_timeout_source) {
2091                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2092                 if (r < 0)
2093                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2094
2095                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2096                 if (r < 0)
2097                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2098         } else {
2099                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2100                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2101                 if (r < 0)
2102                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2103         }
2104
2105         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2106         if (r < 0) {
2107                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2108                 return log_oom();
2109         }
2110
2111         m->shutdown_dry_run = dry_run;
2112
2113         if (m->nologin_timeout_source) {
2114                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2115                 if (r < 0)
2116                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2117
2118                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2119                 if (r < 0)
2120                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2121         } else {
2122                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2123                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2124                 if (r < 0)
2125                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2126         }
2127
2128         m->scheduled_shutdown_timeout = elapse;
2129
2130         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2131         if (r >= 0) {
2132                 const char *tty = NULL;
2133
2134                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2135                 (void) sd_bus_creds_get_tty(creds, &tty);
2136
2137                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2138                 if (r < 0) {
2139                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2140                         return log_oom();
2141                 }
2142         }
2143
2144         r = manager_setup_wall_message_timer(m);
2145         if (r < 0)
2146                 return r;
2147
2148         r = update_schedule_file(m);
2149         if (r < 0)
2150                 return r;
2151
2152         return sd_bus_reply_method_return(message, NULL);
2153 }
2154
2155 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2156         Manager *m = userdata;
2157         bool cancelled;
2158
2159         assert(m);
2160         assert(message);
2161
2162         cancelled = m->scheduled_shutdown_type != NULL;
2163         reset_scheduled_shutdown(m);
2164
2165         if (cancelled && m->enable_wall_messages) {
2166                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2167                 _cleanup_free_ char *username = NULL;
2168                 const char *tty = NULL;
2169                 uid_t uid = 0;
2170                 int r;
2171
2172                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2173                 if (r >= 0) {
2174                         (void) sd_bus_creds_get_uid(creds, &uid);
2175                         (void) sd_bus_creds_get_tty(creds, &tty);
2176                 }
2177
2178                 username = uid_to_name(uid);
2179                 utmp_wall("The system shutdown has been cancelled",
2180                           username, tty, logind_wall_tty_filter, m);
2181         }
2182
2183         return sd_bus_reply_method_return(message, "b", cancelled);
2184 }
2185
2186 static int method_can_shutdown_or_sleep(
2187                 Manager *m,
2188                 sd_bus_message *message,
2189                 InhibitWhat w,
2190                 const char *action,
2191                 const char *action_multiple_sessions,
2192                 const char *action_ignore_inhibit,
2193                 const char *sleep_verb,
2194                 sd_bus_error *error) {
2195
2196         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2197         HandleAction handle;
2198         bool multiple_sessions, challenge, blocked;
2199         const char *result = NULL;
2200         uid_t uid;
2201         int r;
2202
2203         assert(m);
2204         assert(message);
2205         assert(w >= 0);
2206         assert(w <= _INHIBIT_WHAT_MAX);
2207         assert(action);
2208         assert(action_multiple_sessions);
2209         assert(action_ignore_inhibit);
2210
2211         if (sleep_verb) {
2212                 r = can_sleep(sleep_verb);
2213                 if (IN_SET(r,  0, -ENOSPC))
2214                         return sd_bus_reply_method_return(message, "s", "na");
2215                 if (r < 0)
2216                         return r;
2217         }
2218
2219         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2220         if (r < 0)
2221                 return r;
2222
2223         r = sd_bus_creds_get_euid(creds, &uid);
2224         if (r < 0)
2225                 return r;
2226
2227         r = have_multiple_sessions(m, uid);
2228         if (r < 0)
2229                 return r;
2230
2231         multiple_sessions = r > 0;
2232         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2233
2234         handle = handle_action_from_string(sleep_verb);
2235         if (handle >= 0) {
2236                 const char *target;
2237
2238                 target = manager_target_for_action(handle);
2239                 if (target) {
2240                         _cleanup_free_ char *load_state = NULL;
2241
2242                         r = unit_load_state(m->bus, target, &load_state);
2243                         if (r < 0)
2244                                 return r;
2245
2246                         if (!streq(load_state, "loaded")) {
2247                                 result = "no";
2248                                 goto finish;
2249                         }
2250                 }
2251         }
2252
2253         if (multiple_sessions) {
2254                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2255                 if (r < 0)
2256                         return r;
2257
2258                 if (r > 0)
2259                         result = "yes";
2260                 else if (challenge)
2261                         result = "challenge";
2262                 else
2263                         result = "no";
2264         }
2265
2266         if (blocked) {
2267                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2268                 if (r < 0)
2269                         return r;
2270
2271                 if (r > 0) {
2272                         if (!result)
2273                                 result = "yes";
2274                 } else if (challenge) {
2275                         if (!result || streq(result, "yes"))
2276                                 result = "challenge";
2277                 } else
2278                         result = "no";
2279         }
2280
2281         if (!multiple_sessions && !blocked) {
2282                 /* If neither inhibit nor multiple sessions
2283                  * apply then just check the normal policy */
2284
2285                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2286                 if (r < 0)
2287                         return r;
2288
2289                 if (r > 0)
2290                         result = "yes";
2291                 else if (challenge)
2292                         result = "challenge";
2293                 else
2294                         result = "no";
2295         }
2296
2297  finish:
2298         return sd_bus_reply_method_return(message, "s", result);
2299 }
2300
2301 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2302         Manager *m = userdata;
2303
2304         return method_can_shutdown_or_sleep(
2305                         m, message,
2306                         INHIBIT_SHUTDOWN,
2307                         "org.freedesktop.login1.power-off",
2308                         "org.freedesktop.login1.power-off-multiple-sessions",
2309                         "org.freedesktop.login1.power-off-ignore-inhibit",
2310                         NULL,
2311                         error);
2312 }
2313
2314 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2315         Manager *m = userdata;
2316
2317         return method_can_shutdown_or_sleep(
2318                         m, message,
2319                         INHIBIT_SHUTDOWN,
2320                         "org.freedesktop.login1.reboot",
2321                         "org.freedesktop.login1.reboot-multiple-sessions",
2322                         "org.freedesktop.login1.reboot-ignore-inhibit",
2323                         NULL,
2324                         error);
2325 }
2326
2327 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2328         Manager *m = userdata;
2329
2330         return method_can_shutdown_or_sleep(
2331                         m, message,
2332                         INHIBIT_SHUTDOWN,
2333                         "org.freedesktop.login1.halt",
2334                         "org.freedesktop.login1.halt-multiple-sessions",
2335                         "org.freedesktop.login1.halt-ignore-inhibit",
2336                         NULL,
2337                         error);
2338 }
2339
2340 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2341         Manager *m = userdata;
2342
2343         return method_can_shutdown_or_sleep(
2344                         m, message,
2345                         INHIBIT_SLEEP,
2346                         "org.freedesktop.login1.suspend",
2347                         "org.freedesktop.login1.suspend-multiple-sessions",
2348                         "org.freedesktop.login1.suspend-ignore-inhibit",
2349                         "suspend",
2350                         error);
2351 }
2352
2353 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2354         Manager *m = userdata;
2355
2356         return method_can_shutdown_or_sleep(
2357                         m, message,
2358                         INHIBIT_SLEEP,
2359                         "org.freedesktop.login1.hibernate",
2360                         "org.freedesktop.login1.hibernate-multiple-sessions",
2361                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2362                         "hibernate",
2363                         error);
2364 }
2365
2366 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2367         Manager *m = userdata;
2368
2369         return method_can_shutdown_or_sleep(
2370                         m, message,
2371                         INHIBIT_SLEEP,
2372                         "org.freedesktop.login1.hibernate",
2373                         "org.freedesktop.login1.hibernate-multiple-sessions",
2374                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2375                         "hybrid-sleep",
2376                         error);
2377 }
2378
2379 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2380         Manager *m = userdata;
2381
2382         return method_can_shutdown_or_sleep(
2383                         m, message,
2384                         INHIBIT_SLEEP,
2385                         "org.freedesktop.login1.hibernate",
2386                         "org.freedesktop.login1.hibernate-multiple-sessions",
2387                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2388                         "suspend-then-hibernate",
2389                         error);
2390 }
2391
2392 static int property_get_reboot_to_firmware_setup(
2393                 sd_bus *bus,
2394                 const char *path,
2395                 const char *interface,
2396                 const char *property,
2397                 sd_bus_message *reply,
2398                 void *userdata,
2399                 sd_bus_error *error) {
2400         int r;
2401
2402         assert(bus);
2403         assert(reply);
2404         assert(userdata);
2405
2406         r = efi_get_reboot_to_firmware();
2407         if (r < 0 && r != -EOPNOTSUPP)
2408                 log_warning_errno(r, "Failed to determine reboot-to-firmware state: %m");
2409
2410         return sd_bus_message_append(reply, "b", r > 0);
2411 }
2412
2413 static int method_set_reboot_to_firmware_setup(
2414                 sd_bus_message *message,
2415                 void *userdata,
2416                 sd_bus_error *error) {
2417
2418         int b, r;
2419         Manager *m = userdata;
2420
2421         assert(message);
2422         assert(m);
2423
2424         r = sd_bus_message_read(message, "b", &b);
2425         if (r < 0)
2426                 return r;
2427
2428         r = bus_verify_polkit_async(message,
2429                                     CAP_SYS_ADMIN,
2430                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2431                                     NULL,
2432                                     false,
2433                                     UID_INVALID,
2434                                     &m->polkit_registry,
2435                                     error);
2436         if (r < 0)
2437                 return r;
2438         if (r == 0)
2439                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2440
2441         r = efi_set_reboot_to_firmware(b);
2442         if (r < 0)
2443                 return r;
2444
2445         return sd_bus_reply_method_return(message, NULL);
2446 }
2447
2448 static int method_can_reboot_to_firmware_setup(
2449                 sd_bus_message *message,
2450                 void *userdata,
2451                 sd_bus_error *error) {
2452
2453         int r;
2454         bool challenge;
2455         const char *result;
2456         Manager *m = userdata;
2457
2458         assert(message);
2459         assert(m);
2460
2461         r = efi_reboot_to_firmware_supported();
2462         if (r < 0) {
2463                 if (r != -EOPNOTSUPP)
2464                         log_warning_errno(r, "Failed to determine whether reboot to firmware is supported: %m");
2465
2466                 return sd_bus_reply_method_return(message, "s", "na");
2467         }
2468
2469         r = bus_test_polkit(message,
2470                             CAP_SYS_ADMIN,
2471                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2472                             NULL,
2473                             UID_INVALID,
2474                             &challenge,
2475                             error);
2476         if (r < 0)
2477                 return r;
2478
2479         if (r > 0)
2480                 result = "yes";
2481         else if (challenge)
2482                 result = "challenge";
2483         else
2484                 result = "no";
2485
2486         return sd_bus_reply_method_return(message, "s", result);
2487 }
2488
2489 static int method_set_wall_message(
2490                 sd_bus_message *message,
2491                 void *userdata,
2492                 sd_bus_error *error) {
2493
2494         int r;
2495         Manager *m = userdata;
2496         char *wall_message;
2497         unsigned enable_wall_messages;
2498
2499         assert(message);
2500         assert(m);
2501
2502         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2503         if (r < 0)
2504                 return r;
2505
2506         r = bus_verify_polkit_async(message,
2507                                     CAP_SYS_ADMIN,
2508                                     "org.freedesktop.login1.set-wall-message",
2509                                     NULL,
2510                                     false,
2511                                     UID_INVALID,
2512                                     &m->polkit_registry,
2513                                     error);
2514         if (r < 0)
2515                 return r;
2516         if (r == 0)
2517                 return 1; /* Will call us back */
2518
2519         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2520         if (r < 0)
2521                 return log_oom();
2522
2523         m->enable_wall_messages = enable_wall_messages;
2524
2525         return sd_bus_reply_method_return(message, NULL);
2526 }
2527
2528 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2529         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2530         const char *who, *why, *what, *mode;
2531         _cleanup_free_ char *id = NULL;
2532         _cleanup_close_ int fifo_fd = -1;
2533         Manager *m = userdata;
2534         Inhibitor *i = NULL;
2535         InhibitMode mm;
2536         InhibitWhat w;
2537         pid_t pid;
2538         uid_t uid;
2539         int r;
2540
2541         assert(message);
2542         assert(m);
2543
2544         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2545         if (r < 0)
2546                 return r;
2547
2548         w = inhibit_what_from_string(what);
2549         if (w <= 0)
2550                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2551
2552         mm = inhibit_mode_from_string(mode);
2553         if (mm < 0)
2554                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2555
2556         /* Delay is only supported for shutdown/sleep */
2557         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2558                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2559
2560         /* Don't allow taking delay locks while we are already
2561          * executing the operation. We shouldn't create the impression
2562          * that the lock was successful if the machine is about to go
2563          * down/suspend any moment. */
2564         if (m->action_what & w)
2565                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2566
2567         r = bus_verify_polkit_async(
2568                         message,
2569                         CAP_SYS_BOOT,
2570                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2571                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2572                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2573                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2574                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2575                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2576                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2577                         NULL,
2578                         false,
2579                         UID_INVALID,
2580                         &m->polkit_registry,
2581                         error);
2582         if (r < 0)
2583                 return r;
2584         if (r == 0)
2585                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2586
2587         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2588         if (r < 0)
2589                 return r;
2590
2591         r = sd_bus_creds_get_euid(creds, &uid);
2592         if (r < 0)
2593                 return r;
2594
2595         r = sd_bus_creds_get_pid(creds, &pid);
2596         if (r < 0)
2597                 return r;
2598
2599         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2600                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2601
2602         do {
2603                 id = mfree(id);
2604
2605                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2606                         return -ENOMEM;
2607
2608         } while (hashmap_get(m->inhibitors, id));
2609
2610         r = manager_add_inhibitor(m, id, &i);
2611         if (r < 0)
2612                 return r;
2613
2614         i->what = w;
2615         i->mode = mm;
2616         i->pid = pid;
2617         i->uid = uid;
2618         i->why = strdup(why);
2619         i->who = strdup(who);
2620
2621         if (!i->why || !i->who) {
2622                 r = -ENOMEM;
2623                 goto fail;
2624         }
2625
2626         fifo_fd = inhibitor_create_fifo(i);
2627         if (fifo_fd < 0) {
2628                 r = fifo_fd;
2629                 goto fail;
2630         }
2631
2632         inhibitor_start(i);
2633
2634         return sd_bus_reply_method_return(message, "h", fifo_fd);
2635
2636 fail:
2637         if (i)
2638                 inhibitor_free(i);
2639
2640         return r;
2641 }
2642
2643 const sd_bus_vtable manager_vtable[] = {
2644         SD_BUS_VTABLE_START(0),
2645
2646         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2647         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2648
2649         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2650         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2651         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2652         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2653         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, 0),
2654         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2655         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2656         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2657         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2658         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2659         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2660         SD_BUS_PROPERTY("UserStopDelayUSec", "t", NULL, offsetof(Manager, user_stop_delay), SD_BUS_VTABLE_PROPERTY_CONST),
2661         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2662         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2663         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2664         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2665         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
2666         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2667         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2668         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2669         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2670         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2671         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2672         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2673         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2674         SD_BUS_PROPERTY("LidClosed", "b", property_get_lid_closed, 0, 0),
2675         SD_BUS_PROPERTY("OnExternalPower", "b", property_get_on_external_power, 0, 0),
2676         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2677         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2678         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2679         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
2680         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2681         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
2682         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
2683
2684         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2685         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2689         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2690         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2691         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2692         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2693         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2694         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2695         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2696         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2697         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2698         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2699         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2700         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2701         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2702         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2703         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2704         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2705         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2706         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2707         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2708         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2709         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2710         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2711         SD_BUS_METHOD("Halt", "b", NULL, method_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2712         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2713         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2714         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2715         SD_BUS_METHOD("SuspendThenHibernate", "b", NULL, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2716         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2717         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2718         SD_BUS_METHOD("CanHalt", NULL, "s", method_can_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2719         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2720         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2721         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2722         SD_BUS_METHOD("CanSuspendThenHibernate", NULL, "s", method_can_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2723         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2724         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2725         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2726         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2727         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2728         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2729
2730         SD_BUS_SIGNAL("SessionNew", "so", 0),
2731         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2732         SD_BUS_SIGNAL("UserNew", "uo", 0),
2733         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2734         SD_BUS_SIGNAL("SeatNew", "so", 0),
2735         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2736         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2737         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2738
2739         SD_BUS_VTABLE_END
2740 };
2741
2742 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2743         assert(s);
2744         assert(unit);
2745
2746         if (!s->started)
2747                 return 0;
2748
2749         if (result && !streq(result, "done")) {
2750                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2751
2752                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit '%s' failed with '%s'", unit, result);
2753                 return session_send_create_reply(s, &e);
2754         }
2755
2756         return session_send_create_reply(s, NULL);
2757 }
2758
2759 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2760         const char *path, *result, *unit;
2761         Manager *m = userdata;
2762         Session *session;
2763         uint32_t id;
2764         User *user;
2765         int r;
2766
2767         assert(message);
2768         assert(m);
2769
2770         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2771         if (r < 0) {
2772                 bus_log_parse_error(r);
2773                 return 0;
2774         }
2775
2776         if (m->action_job && streq(m->action_job, path)) {
2777                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2778
2779                 /* Tell people that they now may take a lock again */
2780                 (void) send_prepare_for(m, m->action_what, false);
2781
2782                 m->action_job = mfree(m->action_job);
2783                 m->action_unit = NULL;
2784                 m->action_what = 0;
2785                 return 0;
2786         }
2787
2788         session = hashmap_get(m->session_units, unit);
2789         if (session) {
2790                 if (streq_ptr(path, session->scope_job)) {
2791                         session->scope_job = mfree(session->scope_job);
2792                         (void) session_jobs_reply(session, unit, result);
2793
2794                         session_save(session);
2795                         user_save(session->user);
2796                 }
2797
2798                 session_add_to_gc_queue(session);
2799         }
2800
2801         user = hashmap_get(m->user_units, unit);
2802         if (user) {
2803                 if (streq_ptr(path, user->service_job)) {
2804                         user->service_job = mfree(user->service_job);
2805
2806                         LIST_FOREACH(sessions_by_user, session, user->sessions)
2807                                 (void) session_jobs_reply(session, unit, NULL /* don't propagate user service failures to the client */);
2808
2809                         user_save(user);
2810                 }
2811
2812                 user_add_to_gc_queue(user);
2813         }
2814
2815         return 0;
2816 }
2817
2818 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2819         const char *path, *unit;
2820         Manager *m = userdata;
2821         Session *session;
2822         User *user;
2823         int r;
2824
2825         assert(message);
2826         assert(m);
2827
2828         r = sd_bus_message_read(message, "so", &unit, &path);
2829         if (r < 0) {
2830                 bus_log_parse_error(r);
2831                 return 0;
2832         }
2833
2834         session = hashmap_get(m->session_units, unit);
2835         if (session)
2836                 session_add_to_gc_queue(session);
2837
2838         user = hashmap_get(m->user_units, unit);
2839         if (user)
2840                 user_add_to_gc_queue(user);
2841
2842         return 0;
2843 }
2844
2845 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2846         _cleanup_free_ char *unit = NULL;
2847         Manager *m = userdata;
2848         const char *path;
2849         Session *session;
2850         User *user;
2851         int r;
2852
2853         assert(message);
2854         assert(m);
2855
2856         path = sd_bus_message_get_path(message);
2857         if (!path)
2858                 return 0;
2859
2860         r = unit_name_from_dbus_path(path, &unit);
2861         if (r == -EINVAL) /* not a unit */
2862                 return 0;
2863         if (r < 0) {
2864                 log_oom();
2865                 return 0;
2866         }
2867
2868         session = hashmap_get(m->session_units, unit);
2869         if (session)
2870                 session_add_to_gc_queue(session);
2871
2872         user = hashmap_get(m->user_units, unit);
2873         if (user)
2874                 user_add_to_gc_queue(user);
2875
2876         return 0;
2877 }
2878
2879 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2880         Manager *m = userdata;
2881         Session *session;
2882         Iterator i;
2883         int b, r;
2884
2885         assert(message);
2886         assert(m);
2887
2888         r = sd_bus_message_read(message, "b", &b);
2889         if (r < 0) {
2890                 bus_log_parse_error(r);
2891                 return 0;
2892         }
2893
2894         if (b)
2895                 return 0;
2896
2897         /* systemd finished reloading, let's recheck all our sessions */
2898         log_debug("System manager has been reloaded, rechecking sessions...");
2899
2900         HASHMAP_FOREACH(session, m->sessions, i)
2901                 session_add_to_gc_queue(session);
2902
2903         return 0;
2904 }
2905
2906 int manager_send_changed(Manager *manager, const char *property, ...) {
2907         char **l;
2908
2909         assert(manager);
2910
2911         l = strv_from_stdarg_alloca(property);
2912
2913         return sd_bus_emit_properties_changed_strv(
2914                         manager->bus,
2915                         "/org/freedesktop/login1",
2916                         "org.freedesktop.login1.Manager",
2917                         l);
2918 }
2919
2920 static int strdup_job(sd_bus_message *reply, char **job) {
2921         const char *j;
2922         char *copy;
2923         int r;
2924
2925         r = sd_bus_message_read(reply, "o", &j);
2926         if (r < 0)
2927                 return r;
2928
2929         copy = strdup(j);
2930         if (!copy)
2931                 return -ENOMEM;
2932
2933         *job = copy;
2934         return 1;
2935 }
2936
2937 int manager_start_scope(
2938                 Manager *manager,
2939                 const char *scope,
2940                 pid_t pid,
2941                 const char *slice,
2942                 const char *description,
2943                 char **wants,
2944                 char **after,
2945                 const char *requires_mounts_for,
2946                 sd_bus_message *more_properties,
2947                 sd_bus_error *error,
2948                 char **job) {
2949
2950         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2951         char **i;
2952         int r;
2953
2954         assert(manager);
2955         assert(scope);
2956         assert(pid > 1);
2957         assert(job);
2958
2959         r = sd_bus_message_new_method_call(
2960                         manager->bus,
2961                         &m,
2962                         "org.freedesktop.systemd1",
2963                         "/org/freedesktop/systemd1",
2964                         "org.freedesktop.systemd1.Manager",
2965                         "StartTransientUnit");
2966         if (r < 0)
2967                 return r;
2968
2969         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
2970         if (r < 0)
2971                 return r;
2972
2973         r = sd_bus_message_open_container(m, 'a', "(sv)");
2974         if (r < 0)
2975                 return r;
2976
2977         if (!isempty(slice)) {
2978                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
2979                 if (r < 0)
2980                         return r;
2981         }
2982
2983         if (!isempty(description)) {
2984                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2985                 if (r < 0)
2986                         return r;
2987         }
2988
2989         STRV_FOREACH(i, wants) {
2990                 r = sd_bus_message_append(m, "(sv)", "Wants", "as", 1, *i);
2991                 if (r < 0)
2992                         return r;
2993         }
2994
2995         STRV_FOREACH(i, after) {
2996                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, *i);
2997                 if (r < 0)
2998                         return r;
2999         }
3000
3001         if (!empty_or_root(requires_mounts_for)) {
3002                 r = sd_bus_message_append(m, "(sv)", "RequiresMountsFor", "as", 1, requires_mounts_for);
3003                 if (r < 0)
3004                         return r;
3005         }
3006
3007         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
3008          * SIGTERM */
3009         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3010         if (r < 0)
3011                 return r;
3012
3013         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3014         if (r < 0)
3015                 return r;
3016
3017         /* disable TasksMax= for the session scope, rely on the slice setting for it */
3018         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
3019         if (r < 0)
3020                 return bus_log_create_error(r);
3021
3022         if (more_properties) {
3023                 /* If TasksMax also appears here, it will overwrite the default value set above */
3024                 r = sd_bus_message_copy(m, more_properties, true);
3025                 if (r < 0)
3026                         return r;
3027         }
3028
3029         r = sd_bus_message_close_container(m);
3030         if (r < 0)
3031                 return r;
3032
3033         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3034         if (r < 0)
3035                 return r;
3036
3037         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3038         if (r < 0)
3039                 return r;
3040
3041         return strdup_job(reply, job);
3042 }
3043
3044 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3045         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3046         int r;
3047
3048         assert(manager);
3049         assert(unit);
3050         assert(job);
3051
3052         r = sd_bus_call_method(
3053                         manager->bus,
3054                         "org.freedesktop.systemd1",
3055                         "/org/freedesktop/systemd1",
3056                         "org.freedesktop.systemd1.Manager",
3057                         "StartUnit",
3058                         error,
3059                         &reply,
3060                         "ss", unit, "replace");
3061         if (r < 0)
3062                 return r;
3063
3064         return strdup_job(reply, job);
3065 }
3066
3067 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3068         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3069         int r;
3070
3071         assert(manager);
3072         assert(unit);
3073         assert(job);
3074
3075         r = sd_bus_call_method(
3076                         manager->bus,
3077                         "org.freedesktop.systemd1",
3078                         "/org/freedesktop/systemd1",
3079                         "org.freedesktop.systemd1.Manager",
3080                         "StopUnit",
3081                         error,
3082                         &reply,
3083                         "ss", unit, "fail");
3084         if (r < 0) {
3085                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3086                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3087
3088                         *job = NULL;
3089                         sd_bus_error_free(error);
3090                         return 0;
3091                 }
3092
3093                 return r;
3094         }
3095
3096         return strdup_job(reply, job);
3097 }
3098
3099 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *ret_error) {
3100         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3101         _cleanup_free_ char *path = NULL;
3102         int r;
3103
3104         assert(manager);
3105         assert(scope);
3106
3107         path = unit_dbus_path_from_name(scope);
3108         if (!path)
3109                 return -ENOMEM;
3110
3111         r = sd_bus_call_method(
3112                         manager->bus,
3113                         "org.freedesktop.systemd1",
3114                         path,
3115                         "org.freedesktop.systemd1.Scope",
3116                         "Abandon",
3117                         &error,
3118                         NULL,
3119                         NULL);
3120         if (r < 0) {
3121                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3122                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED) ||
3123                     sd_bus_error_has_name(&error, BUS_ERROR_SCOPE_NOT_RUNNING))
3124                         return 0;
3125
3126                 sd_bus_error_move(ret_error, &error);
3127                 return r;
3128         }
3129
3130         return 1;
3131 }
3132
3133 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3134         assert(manager);
3135         assert(unit);
3136
3137         return sd_bus_call_method(
3138                         manager->bus,
3139                         "org.freedesktop.systemd1",
3140                         "/org/freedesktop/systemd1",
3141                         "org.freedesktop.systemd1.Manager",
3142                         "KillUnit",
3143                         error,
3144                         NULL,
3145                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3146 }
3147
3148 int manager_unit_is_active(Manager *manager, const char *unit, sd_bus_error *ret_error) {
3149         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3150         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3151         _cleanup_free_ char *path = NULL;
3152         const char *state;
3153         int r;
3154
3155         assert(manager);
3156         assert(unit);
3157
3158         path = unit_dbus_path_from_name(unit);
3159         if (!path)
3160                 return -ENOMEM;
3161
3162         r = sd_bus_get_property(
3163                         manager->bus,
3164                         "org.freedesktop.systemd1",
3165                         path,
3166                         "org.freedesktop.systemd1.Unit",
3167                         "ActiveState",
3168                         &error,
3169                         &reply,
3170                         "s");
3171         if (r < 0) {
3172                 /* systemd might have droppped off momentarily, let's
3173                  * not make this an error */
3174                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3175                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3176                         return true;
3177
3178                 /* If the unit is already unloaded then it's not
3179                  * active */
3180                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3181                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3182                         return false;
3183
3184                 sd_bus_error_move(ret_error, &error);
3185                 return r;
3186         }
3187
3188         r = sd_bus_message_read(reply, "s", &state);
3189         if (r < 0)
3190                 return r;
3191
3192         return !STR_IN_SET(state, "inactive", "failed");
3193 }
3194
3195 int manager_job_is_active(Manager *manager, const char *path, sd_bus_error *ret_error) {
3196         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3197         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3198         int r;
3199
3200         assert(manager);
3201         assert(path);
3202
3203         r = sd_bus_get_property(
3204                         manager->bus,
3205                         "org.freedesktop.systemd1",
3206                         path,
3207                         "org.freedesktop.systemd1.Job",
3208                         "State",
3209                         &error,
3210                         &reply,
3211                         "s");
3212         if (r < 0) {
3213                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3214                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3215                         return true;
3216
3217                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3218                         return false;
3219
3220                 sd_bus_error_move(ret_error, &error);
3221                 return r;
3222         }
3223
3224         /* We don't actually care about the state really. The fact
3225          * that we could read the job state is enough for us */
3226
3227         return true;
3228 }