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