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