src/login/logind-dbus.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2011 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <pwd.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include "sd-messages.h"
  26
  27 #include "alloc-util.h"
  28 #include "audit-util.h"
  29 #include "bus-common-errors.h"
  30 #include "bus-error.h"
  31 #include "bus-util.h"
  32 #include "dirent-util.h"
  33 #include "efivars.h"
  34 #include "escape.h"
  35 #include "fd-util.h"
  36 #include "fileio-label.h"
  37 #include "format-util.h"
  38 #include "fs-util.h"
  39 #include "logind.h"
  40 #include "mkdir.h"
  41 #include "path-util.h"
  42 #include "process-util.h"
  43 #include "selinux-util.h"
  44 #include "sleep-config.h"
  45 #include "special.h"
  46 #include "strv.h"
  47 #include "terminal-util.h"
  48 #include "udev-util.h"
  49 #include "unit-name.h"
  50 #include "user-util.h"
  51 #include "utmp-wtmp.h"
  52
  53 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  54         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  55         Session *session;
  56         int r;
  57
  58         assert(m);
  59         assert(message);
  60         assert(ret);
  61
  62         if (isempty(name)) {
  63                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  64                 if (r < 0)
  65                         return r;
  66
  67                 r = sd_bus_creds_get_session(creds, &name);
  68                 if (r < 0)
  69                         return r;
  70         }
  71
  72         session = hashmap_get(m->sessions, name);
  73         if (!session)
  74                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  75
  76         *ret = session;
  77         return 0;
  78 }
  79
  80 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
  81         User *user;
  82         int r;
  83
  84         assert(m);
  85         assert(message);
  86         assert(ret);
  87
  88         if (uid == UID_INVALID) {
  89                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  90
  91                 /* Note that we get the owner UID of the session, not the actual client UID here! */
  92                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
  93                 if (r < 0)
  94                         return r;
  95
  96                 r = sd_bus_creds_get_owner_uid(creds, &uid);
  97                 if (r < 0)
  98                         return r;
  99         }
 100
 101         user = hashmap_get(m->users, UID_TO_PTR(uid));
 102         if (!user)
 103                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid);
 104
 105         *ret = user;
 106         return 0;
 107 }
 108
 109 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 110         Seat *seat;
 111         int r;
 112
 113         assert(m);
 114         assert(message);
 115         assert(ret);
 116
 117         if (isempty(name)) {
 118                 Session *session;
 119
 120                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 121                 if (r < 0)
 122                         return r;
 123
 124                 seat = session->seat;
 125                 if (!seat)
 126                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 127         } else {
 128                 seat = hashmap_get(m->seats, name);
 129                 if (!seat)
 130                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 131         }
 132
 133         *ret = seat;
 134         return 0;
 135 }
 136
 137 static int property_get_idle_hint(
 138                 sd_bus *bus,
 139                 const char *path,
 140                 const char *interface,
 141                 const char *property,
 142                 sd_bus_message *reply,
 143                 void *userdata,
 144                 sd_bus_error *error) {
 145
 146         Manager *m = userdata;
 147
 148         assert(bus);
 149         assert(reply);
 150         assert(m);
 151
 152         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 153 }
 154
 155 static int property_get_idle_since_hint(
 156                 sd_bus *bus,
 157                 const char *path,
 158                 const char *interface,
 159                 const char *property,
 160                 sd_bus_message *reply,
 161                 void *userdata,
 162                 sd_bus_error *error) {
 163
 164         Manager *m = userdata;
 165         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 166
 167         assert(bus);
 168         assert(reply);
 169         assert(m);
 170
 171         manager_get_idle_hint(m, &t);
 172
 173         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 174 }
 175
 176 static int property_get_inhibited(
 177                 sd_bus *bus,
 178                 const char *path,
 179                 const char *interface,
 180                 const char *property,
 181                 sd_bus_message *reply,
 182                 void *userdata,
 183                 sd_bus_error *error) {
 184
 185         Manager *m = userdata;
 186         InhibitWhat w;
 187
 188         assert(bus);
 189         assert(reply);
 190         assert(m);
 191
 192         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 193
 194         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 195 }
 196
 197 static int property_get_preparing(
 198                 sd_bus *bus,
 199                 const char *path,
 200                 const char *interface,
 201                 const char *property,
 202                 sd_bus_message *reply,
 203                 void *userdata,
 204                 sd_bus_error *error) {
 205
 206         Manager *m = userdata;
 207         bool b;
 208
 209         assert(bus);
 210         assert(reply);
 211         assert(m);
 212
 213         if (streq(property, "PreparingForShutdown"))
 214                 b = !!(m->action_what & INHIBIT_SHUTDOWN);
 215         else
 216                 b = !!(m->action_what & INHIBIT_SLEEP);
 217
 218         return sd_bus_message_append(reply, "b", b);
 219 }
 220
 221 static int property_get_scheduled_shutdown(
 222                 sd_bus *bus,
 223                 const char *path,
 224                 const char *interface,
 225                 const char *property,
 226                 sd_bus_message *reply,
 227                 void *userdata,
 228                 sd_bus_error *error) {
 229
 230         Manager *m = userdata;
 231         int r;
 232
 233         assert(bus);
 234         assert(reply);
 235         assert(m);
 236
 237         r = sd_bus_message_open_container(reply, 'r', "st");
 238         if (r < 0)
 239                 return r;
 240
 241         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 242         if (r < 0)
 243                 return r;
 244
 245         return sd_bus_message_close_container(reply);
 246 }
 247
 248 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 249
 250 static int property_get_docked(
 251                 sd_bus *bus,
 252                 const char *path,
 253                 const char *interface,
 254                 const char *property,
 255                 sd_bus_message *reply,
 256                 void *userdata,
 257                 sd_bus_error *error) {
 258
 259         Manager *m = userdata;
 260
 261         assert(bus);
 262         assert(reply);
 263         assert(m);
 264
 265         return sd_bus_message_append(reply, "b", manager_is_docked_or_external_displays(m));
 266 }
 267
 268 static int property_get_current_sessions(
 269                 sd_bus *bus,
 270                 const char *path,
 271                 const char *interface,
 272                 const char *property,
 273                 sd_bus_message *reply,
 274                 void *userdata,
 275                 sd_bus_error *error) {
 276
 277         Manager *m = userdata;
 278
 279         assert(bus);
 280         assert(reply);
 281         assert(m);
 282
 283         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->sessions));
 284 }
 285
 286 static int property_get_current_inhibitors(
 287                 sd_bus *bus,
 288                 const char *path,
 289                 const char *interface,
 290                 const char *property,
 291                 sd_bus_message *reply,
 292                 void *userdata,
 293                 sd_bus_error *error) {
 294
 295         Manager *m = userdata;
 296
 297         assert(bus);
 298         assert(reply);
 299         assert(m);
 300
 301         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->inhibitors));
 302 }
 303
 304 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 305         _cleanup_free_ char *p = NULL;
 306         Manager *m = userdata;
 307         const char *name;
 308         Session *session;
 309         int r;
 310
 311         assert(message);
 312         assert(m);
 313
 314         r = sd_bus_message_read(message, "s", &name);
 315         if (r < 0)
 316                 return r;
 317
 318         r = manager_get_session_from_creds(m, message, name, error, &session);
 319         if (r < 0)
 320                 return r;
 321
 322         p = session_bus_path(session);
 323         if (!p)
 324                 return -ENOMEM;
 325
 326         return sd_bus_reply_method_return(message, "o", p);
 327 }
 328
 329 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 330         _cleanup_free_ char *p = NULL;
 331         Session *session = NULL;
 332         Manager *m = userdata;
 333         pid_t pid;
 334         int r;
 335
 336         assert(message);
 337         assert(m);
 338
 339         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 340
 341         r = sd_bus_message_read(message, "u", &pid);
 342         if (r < 0)
 343                 return r;
 344         if (pid < 0)
 345                 return -EINVAL;
 346
 347         if (pid == 0) {
 348                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 349                 if (r < 0)
 350                         return r;
 351         } else {
 352                 r = manager_get_session_by_pid(m, pid, &session);
 353                 if (r < 0)
 354                         return r;
 355
 356                 if (!session)
 357                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 358         }
 359
 360         p = session_bus_path(session);
 361         if (!p)
 362                 return -ENOMEM;
 363
 364         return sd_bus_reply_method_return(message, "o", p);
 365 }
 366
 367 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 368         _cleanup_free_ char *p = NULL;
 369         Manager *m = userdata;
 370         uint32_t uid;
 371         User *user;
 372         int r;
 373
 374         assert(message);
 375         assert(m);
 376
 377         r = sd_bus_message_read(message, "u", &uid);
 378         if (r < 0)
 379                 return r;
 380
 381         r = manager_get_user_from_creds(m, message, uid, error, &user);
 382         if (r < 0)
 383                 return r;
 384
 385         p = user_bus_path(user);
 386         if (!p)
 387                 return -ENOMEM;
 388
 389         return sd_bus_reply_method_return(message, "o", p);
 390 }
 391
 392 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 393         _cleanup_free_ char *p = NULL;
 394         Manager *m = userdata;
 395         User *user = NULL;
 396         pid_t pid;
 397         int r;
 398
 399         assert(message);
 400         assert(m);
 401
 402         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 403
 404         r = sd_bus_message_read(message, "u", &pid);
 405         if (r < 0)
 406                 return r;
 407         if (pid < 0)
 408                 return -EINVAL;
 409
 410         if (pid == 0) {
 411                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 412                 if (r < 0)
 413                         return r;
 414         } else {
 415                 r = manager_get_user_by_pid(m, pid, &user);
 416                 if (r < 0)
 417                         return r;
 418                 if (!user)
 419                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "PID "PID_FMT" does not belong to any known or logged in user", pid);
 420         }
 421
 422         p = user_bus_path(user);
 423         if (!p)
 424                 return -ENOMEM;
 425
 426         return sd_bus_reply_method_return(message, "o", p);
 427 }
 428
 429 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 430         _cleanup_free_ char *p = NULL;
 431         Manager *m = userdata;
 432         const char *name;
 433         Seat *seat;
 434         int r;
 435
 436         assert(message);
 437         assert(m);
 438
 439         r = sd_bus_message_read(message, "s", &name);
 440         if (r < 0)
 441                 return r;
 442
 443         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 444         if (r < 0)
 445                 return r;
 446
 447         p = seat_bus_path(seat);
 448         if (!p)
 449                 return -ENOMEM;
 450
 451         return sd_bus_reply_method_return(message, "o", p);
 452 }
 453
 454 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 455         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 456         Manager *m = userdata;
 457         Session *session;
 458         Iterator i;
 459         int r;
 460
 461         assert(message);
 462         assert(m);
 463
 464         r = sd_bus_message_new_method_return(message, &reply);
 465         if (r < 0)
 466                 return r;
 467
 468         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 469         if (r < 0)
 470                 return r;
 471
 472         HASHMAP_FOREACH(session, m->sessions, i) {
 473                 _cleanup_free_ char *p = NULL;
 474
 475                 p = session_bus_path(session);
 476                 if (!p)
 477                         return -ENOMEM;
 478
 479                 r = sd_bus_message_append(reply, "(susso)",
 480                                           session->id,
 481                                           (uint32_t) session->user->uid,
 482                                           session->user->name,
 483                                           session->seat ? session->seat->id : "",
 484                                           p);
 485                 if (r < 0)
 486                         return r;
 487         }
 488
 489         r = sd_bus_message_close_container(reply);
 490         if (r < 0)
 491                 return r;
 492
 493         return sd_bus_send(NULL, reply, NULL);
 494 }
 495
 496 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 497         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 498         Manager *m = userdata;
 499         User *user;
 500         Iterator i;
 501         int r;
 502
 503         assert(message);
 504         assert(m);
 505
 506         r = sd_bus_message_new_method_return(message, &reply);
 507         if (r < 0)
 508                 return r;
 509
 510         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 511         if (r < 0)
 512                 return r;
 513
 514         HASHMAP_FOREACH(user, m->users, i) {
 515                 _cleanup_free_ char *p = NULL;
 516
 517                 p = user_bus_path(user);
 518                 if (!p)
 519                         return -ENOMEM;
 520
 521                 r = sd_bus_message_append(reply, "(uso)",
 522                                           (uint32_t) user->uid,
 523                                           user->name,
 524                                           p);
 525                 if (r < 0)
 526                         return r;
 527         }
 528
 529         r = sd_bus_message_close_container(reply);
 530         if (r < 0)
 531                 return r;
 532
 533         return sd_bus_send(NULL, reply, NULL);
 534 }
 535
 536 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 537         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 538         Manager *m = userdata;
 539         Seat *seat;
 540         Iterator i;
 541         int r;
 542
 543         assert(message);
 544         assert(m);
 545
 546         r = sd_bus_message_new_method_return(message, &reply);
 547         if (r < 0)
 548                 return r;
 549
 550         r = sd_bus_message_open_container(reply, 'a', "(so)");
 551         if (r < 0)
 552                 return r;
 553
 554         HASHMAP_FOREACH(seat, m->seats, i) {
 555                 _cleanup_free_ char *p = NULL;
 556
 557                 p = seat_bus_path(seat);
 558                 if (!p)
 559                         return -ENOMEM;
 560
 561                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 562                 if (r < 0)
 563                         return r;
 564         }
 565
 566         r = sd_bus_message_close_container(reply);
 567         if (r < 0)
 568                 return r;
 569
 570         return sd_bus_send(NULL, reply, NULL);
 571 }
 572
 573 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 574         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 575         Manager *m = userdata;
 576         Inhibitor *inhibitor;
 577         Iterator i;
 578         int r;
 579
 580         assert(message);
 581         assert(m);
 582
 583         r = sd_bus_message_new_method_return(message, &reply);
 584         if (r < 0)
 585                 return r;
 586
 587         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 588         if (r < 0)
 589                 return r;
 590
 591         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 592
 593                 r = sd_bus_message_append(reply, "(ssssuu)",
 594                                           strempty(inhibit_what_to_string(inhibitor->what)),
 595                                           strempty(inhibitor->who),
 596                                           strempty(inhibitor->why),
 597                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 598                                           (uint32_t) inhibitor->uid,
 599                                           (uint32_t) inhibitor->pid);
 600                 if (r < 0)
 601                         return r;
 602         }
 603
 604         r = sd_bus_message_close_container(reply);
 605         if (r < 0)
 606                 return r;
 607
 608         return sd_bus_send(NULL, reply, NULL);
 609 }
 610
 611 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 612         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 613         uint32_t audit_id = 0;
 614         _cleanup_free_ char *id = NULL;
 615         Session *session = NULL;
 616         Manager *m = userdata;
 617         User *user = NULL;
 618         Seat *seat = NULL;
 619         pid_t leader;
 620         uid_t uid;
 621         int remote;
 622         uint32_t vtnr = 0;
 623         SessionType t;
 624         SessionClass c;
 625         int r;
 626
 627         assert(message);
 628         assert(m);
 629
 630         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 631         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 632
 633         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 634         if (r < 0)
 635                 return r;
 636
 637         if (!uid_is_valid(uid))
 638                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 639         if (leader < 0 || leader == 1)
 640                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 641
 642         if (isempty(type))
 643                 t = _SESSION_TYPE_INVALID;
 644         else {
 645                 t = session_type_from_string(type);
 646                 if (t < 0)
 647                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 648         }
 649
 650         if (isempty(class))
 651                 c = _SESSION_CLASS_INVALID;
 652         else {
 653                 c = session_class_from_string(class);
 654                 if (c < 0)
 655                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 656         }
 657
 658         if (isempty(desktop))
 659                 desktop = NULL;
 660         else {
 661                 if (!string_is_safe(desktop))
 662                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 663         }
 664
 665         if (isempty(cseat))
 666                 seat = NULL;
 667         else {
 668                 seat = hashmap_get(m->seats, cseat);
 669                 if (!seat)
 670                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 671         }
 672
 673         if (tty_is_vc(tty)) {
 674                 int v;
 675
 676                 if (!seat)
 677                         seat = m->seat0;
 678                 else if (seat != m->seat0)
 679                         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);
 680
 681                 v = vtnr_from_tty(tty);
 682                 if (v <= 0)
 683                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 684
 685                 if (!vtnr)
 686                         vtnr = (uint32_t) v;
 687                 else if (vtnr != (uint32_t) v)
 688                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 689
 690         } else if (tty_is_console(tty)) {
 691
 692                 if (!seat)
 693                         seat = m->seat0;
 694                 else if (seat != m->seat0)
 695                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 696
 697                 if (vtnr != 0)
 698                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 699         }
 700
 701         if (seat) {
 702                 if (seat_has_vts(seat)) {
 703                         if (!vtnr || vtnr > 63)
 704                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 705                 } else {
 706                         if (vtnr != 0)
 707                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 708                 }
 709         }
 710
 711         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 712         if (r < 0)
 713                 return r;
 714
 715         if (t == _SESSION_TYPE_INVALID) {
 716                 if (!isempty(display))
 717                         t = SESSION_X11;
 718                 else if (!isempty(tty))
 719                         t = SESSION_TTY;
 720                 else
 721                         t = SESSION_UNSPECIFIED;
 722         }
 723
 724         if (c == _SESSION_CLASS_INVALID) {
 725                 if (t == SESSION_UNSPECIFIED)
 726                         c = SESSION_BACKGROUND;
 727                 else
 728                         c = SESSION_USER;
 729         }
 730
 731         if (leader == 0) {
 732                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 733
 734                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 735                 if (r < 0)
 736                         return r;
 737
 738                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 739                 if (r < 0)
 740                         return r;
 741         }
 742
 743         r = manager_get_session_by_pid(m, leader, NULL);
 744         if (r > 0)
 745                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session");
 746
 747         /*
 748          * Old gdm and lightdm start the user-session on the same VT as
 749          * the greeter session. But they destroy the greeter session
 750          * after the user-session and want the user-session to take
 751          * over the VT. We need to support this for
 752          * backwards-compatibility, so make sure we allow new sessions
 753          * on a VT that a greeter is running on. Furthermore, to allow
 754          * re-logins, we have to allow a greeter to take over a used VT for
 755          * the exact same reasons.
 756          */
 757         if (c != SESSION_GREETER &&
 758             vtnr > 0 &&
 759             vtnr < m->seat0->position_count &&
 760             m->seat0->positions[vtnr] &&
 761             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 762                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 763
 764         if (hashmap_size(m->sessions) >= m->sessions_max)
 765                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 766
 767         audit_session_from_pid(leader, &audit_id);
 768         if (audit_id > 0) {
 769                 /* Keep our session IDs and the audit session IDs in sync */
 770
 771                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 772                         return -ENOMEM;
 773
 774                 /* Wut? There's already a session by this name and we
 775                  * didn't find it above? Weird, then let's not trust
 776                  * the audit data and let's better register a new
 777                  * ID */
 778                 if (hashmap_get(m->sessions, id)) {
 779                         log_warning("Existing logind session ID %s used by new audit session, ignoring", id);
 780                         audit_id = 0;
 781
 782                         id = mfree(id);
 783                 }
 784         }
 785
 786         if (!id) {
 787                 do {
 788                         id = mfree(id);
 789
 790                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 791                                 return -ENOMEM;
 792
 793                 } while (hashmap_get(m->sessions, id));
 794         }
 795
 796         r = manager_add_user_by_uid(m, uid, &user);
 797         if (r < 0)
 798                 goto fail;
 799
 800         r = manager_add_session(m, id, &session);
 801         if (r < 0)
 802                 goto fail;
 803
 804         session_set_user(session, user);
 805
 806         session->leader = leader;
 807         session->audit_id = audit_id;
 808         session->type = t;
 809         session->class = c;
 810         session->remote = remote;
 811         session->vtnr = vtnr;
 812
 813         if (!isempty(tty)) {
 814                 session->tty = strdup(tty);
 815                 if (!session->tty) {
 816                         r = -ENOMEM;
 817                         goto fail;
 818                 }
 819         }
 820
 821         if (!isempty(display)) {
 822                 session->display = strdup(display);
 823                 if (!session->display) {
 824                         r = -ENOMEM;
 825                         goto fail;
 826                 }
 827         }
 828
 829         if (!isempty(remote_user)) {
 830                 session->remote_user = strdup(remote_user);
 831                 if (!session->remote_user) {
 832                         r = -ENOMEM;
 833                         goto fail;
 834                 }
 835         }
 836
 837         if (!isempty(remote_host)) {
 838                 session->remote_host = strdup(remote_host);
 839                 if (!session->remote_host) {
 840                         r = -ENOMEM;
 841                         goto fail;
 842                 }
 843         }
 844
 845         if (!isempty(service)) {
 846                 session->service = strdup(service);
 847                 if (!session->service) {
 848                         r = -ENOMEM;
 849                         goto fail;
 850                 }
 851         }
 852
 853         if (!isempty(desktop)) {
 854                 session->desktop = strdup(desktop);
 855                 if (!session->desktop) {
 856                         r = -ENOMEM;
 857                         goto fail;
 858                 }
 859         }
 860
 861         if (seat) {
 862                 r = seat_attach_session(seat, session);
 863                 if (r < 0)
 864                         goto fail;
 865         }
 866
 867         r = session_start(session);
 868         if (r < 0)
 869                 goto fail;
 870
 871         session->create_message = sd_bus_message_ref(message);
 872
 873         /* Now, let's wait until the slice unit and stuff got
 874          * created. We send the reply back from
 875          * session_send_create_reply(). */
 876
 877         return 1;
 878
 879 fail:
 880         if (session)
 881                 session_add_to_gc_queue(session);
 882
 883         if (user)
 884                 user_add_to_gc_queue(user);
 885
 886         return r;
 887 }
 888
 889 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 890         Manager *m = userdata;
 891         Session *session;
 892         const char *name;
 893         int r;
 894
 895         assert(message);
 896         assert(m);
 897
 898         r = sd_bus_message_read(message, "s", &name);
 899         if (r < 0)
 900                 return r;
 901
 902         r = manager_get_session_from_creds(m, message, name, error, &session);
 903         if (r < 0)
 904                 return r;
 905
 906         r = session_release(session);
 907         if (r < 0)
 908                 return r;
 909
 910         return sd_bus_reply_method_return(message, NULL);
 911 }
 912
 913 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 914         Manager *m = userdata;
 915         Session *session;
 916         const char *name;
 917         int r;
 918
 919         assert(message);
 920         assert(m);
 921
 922         r = sd_bus_message_read(message, "s", &name);
 923         if (r < 0)
 924                 return r;
 925
 926         r = manager_get_session_from_creds(m, message, name, error, &session);
 927         if (r < 0)
 928                 return r;
 929
 930         return bus_session_method_activate(message, session, error);
 931 }
 932
 933 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 934         const char *session_name, *seat_name;
 935         Manager *m = userdata;
 936         Session *session;
 937         Seat *seat;
 938         int r;
 939
 940         assert(message);
 941         assert(m);
 942
 943         /* Same as ActivateSession() but refuses to work if
 944          * the seat doesn't match */
 945
 946         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 947         if (r < 0)
 948                 return r;
 949
 950         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 951         if (r < 0)
 952                 return r;
 953
 954         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 955         if (r < 0)
 956                 return r;
 957
 958         if (session->seat != seat)
 959                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 960
 961         r = session_activate(session);
 962         if (r < 0)
 963                 return r;
 964
 965         return sd_bus_reply_method_return(message, NULL);
 966 }
 967
 968 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 969         Manager *m = userdata;
 970         Session *session;
 971         const char *name;
 972         int r;
 973
 974         assert(message);
 975         assert(m);
 976
 977         r = sd_bus_message_read(message, "s", &name);
 978         if (r < 0)
 979                 return r;
 980
 981         r = manager_get_session_from_creds(m, message, name, error, &session);
 982         if (r < 0)
 983                 return r;
 984
 985         return bus_session_method_lock(message, session, error);
 986 }
 987
 988 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 989         Manager *m = userdata;
 990         int r;
 991
 992         assert(message);
 993         assert(m);
 994
 995         r = bus_verify_polkit_async(
 996                         message,
 997                         CAP_SYS_ADMIN,
 998                         "org.freedesktop.login1.lock-sessions",
 999                         NULL,
1000                         false,
1001                         UID_INVALID,
1002                         &m->polkit_registry,
1003                         error);
1004         if (r < 0)
1005                 return r;
1006         if (r == 0)
1007                 return 1; /* Will call us back */
1008
1009         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1010         if (r < 0)
1011                 return r;
1012
1013         return sd_bus_reply_method_return(message, NULL);
1014 }
1015
1016 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1017         const char *name;
1018         Manager *m = userdata;
1019         Session *session;
1020         int r;
1021
1022         assert(message);
1023         assert(m);
1024
1025         r = sd_bus_message_read(message, "s", &name);
1026         if (r < 0)
1027                 return r;
1028
1029         r = manager_get_session_from_creds(m, message, name, error, &session);
1030         if (r < 0)
1031                 return r;
1032
1033         return bus_session_method_kill(message, session, error);
1034 }
1035
1036 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1037         Manager *m = userdata;
1038         uint32_t uid;
1039         User *user;
1040         int r;
1041
1042         assert(message);
1043         assert(m);
1044
1045         r = sd_bus_message_read(message, "u", &uid);
1046         if (r < 0)
1047                 return r;
1048
1049         r = manager_get_user_from_creds(m, message, uid, error, &user);
1050         if (r < 0)
1051                 return r;
1052
1053         return bus_user_method_kill(message, user, error);
1054 }
1055
1056 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1057         Manager *m = userdata;
1058         const char *name;
1059         Session *session;
1060         int r;
1061
1062         assert(message);
1063         assert(m);
1064
1065         r = sd_bus_message_read(message, "s", &name);
1066         if (r < 0)
1067                 return r;
1068
1069         r = manager_get_session_from_creds(m, message, name, error, &session);
1070         if (r < 0)
1071                 return r;
1072
1073         return bus_session_method_terminate(message, session, error);
1074 }
1075
1076 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1077         Manager *m = userdata;
1078         uint32_t uid;
1079         User *user;
1080         int r;
1081
1082         assert(message);
1083         assert(m);
1084
1085         r = sd_bus_message_read(message, "u", &uid);
1086         if (r < 0)
1087                 return r;
1088
1089         r = manager_get_user_from_creds(m, message, uid, error, &user);
1090         if (r < 0)
1091                 return r;
1092
1093         return bus_user_method_terminate(message, user, error);
1094 }
1095
1096 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1097         Manager *m = userdata;
1098         const char *name;
1099         Seat *seat;
1100         int r;
1101
1102         assert(message);
1103         assert(m);
1104
1105         r = sd_bus_message_read(message, "s", &name);
1106         if (r < 0)
1107                 return r;
1108
1109         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1110         if (r < 0)
1111                 return r;
1112
1113         return bus_seat_method_terminate(message, seat, error);
1114 }
1115
1116 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1117         _cleanup_free_ char *cc = NULL;
1118         Manager *m = userdata;
1119         int r, b, interactive;
1120         struct passwd *pw;
1121         const char *path;
1122         uint32_t uid;
1123         bool self = false;
1124
1125         assert(message);
1126         assert(m);
1127
1128         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1129         if (r < 0)
1130                 return r;
1131
1132         if (uid == UID_INVALID) {
1133                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1134
1135                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1136                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1137                 if (r < 0)
1138                         return r;
1139
1140                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1141                 if (r < 0)
1142                         return r;
1143
1144                 self = true;
1145
1146         } else if (!uid_is_valid(uid))
1147                 return -EINVAL;
1148
1149         errno = 0;
1150         pw = getpwuid(uid);
1151         if (!pw)
1152                 return errno > 0 ? -errno : -ENOENT;
1153
1154         r = bus_verify_polkit_async(
1155                         message,
1156                         CAP_SYS_ADMIN,
1157                         self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger",
1158                         NULL,
1159                         interactive,
1160                         UID_INVALID,
1161                         &m->polkit_registry,
1162                         error);
1163         if (r < 0)
1164                 return r;
1165         if (r == 0)
1166                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1167
1168         mkdir_p_label("/var/lib/systemd", 0755);
1169
1170         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1171         if (r < 0)
1172                 return r;
1173
1174         cc = cescape(pw->pw_name);
1175         if (!cc)
1176                 return -ENOMEM;
1177
1178         path = strjoina("/var/lib/systemd/linger/", cc);
1179         if (b) {
1180                 User *u;
1181
1182                 r = touch(path);
1183                 if (r < 0)
1184                         return r;
1185
1186                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1187                         user_start(u);
1188
1189         } else {
1190                 User *u;
1191
1192                 r = unlink(path);
1193                 if (r < 0 && errno != ENOENT)
1194                         return -errno;
1195
1196                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1197                 if (u)
1198                         user_add_to_gc_queue(u);
1199         }
1200
1201         return sd_bus_reply_method_return(message, NULL);
1202 }
1203
1204 static int trigger_device(Manager *m, struct udev_device *d) {
1205         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1206         struct udev_list_entry *first, *item;
1207         int r;
1208
1209         assert(m);
1210
1211         e = udev_enumerate_new(m->udev);
1212         if (!e)
1213                 return -ENOMEM;
1214
1215         if (d) {
1216                 r = udev_enumerate_add_match_parent(e, d);
1217                 if (r < 0)
1218                         return r;
1219         }
1220
1221         r = udev_enumerate_scan_devices(e);
1222         if (r < 0)
1223                 return r;
1224
1225         first = udev_enumerate_get_list_entry(e);
1226         udev_list_entry_foreach(item, first) {
1227                 _cleanup_free_ char *t = NULL;
1228                 const char *p;
1229
1230                 p = udev_list_entry_get_name(item);
1231
1232                 t = strappend(p, "/uevent");
1233                 if (!t)
1234                         return -ENOMEM;
1235
1236                 write_string_file(t, "change", WRITE_STRING_FILE_CREATE);
1237         }
1238
1239         return 0;
1240 }
1241
1242 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1243         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1244         _cleanup_free_ char *rule = NULL, *file = NULL;
1245         const char *id_for_seat;
1246         int r;
1247
1248         assert(m);
1249         assert(seat);
1250         assert(sysfs);
1251
1252         d = udev_device_new_from_syspath(m->udev, sysfs);
1253         if (!d)
1254                 return -ENODEV;
1255
1256         if (!udev_device_has_tag(d, "seat"))
1257                 return -ENODEV;
1258
1259         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1260         if (!id_for_seat)
1261                 return -ENODEV;
1262
1263         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1264                 return -ENOMEM;
1265
1266         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1267                 return -ENOMEM;
1268
1269         mkdir_p_label("/etc/udev/rules.d", 0755);
1270         r = write_string_file_atomic_label(file, rule);
1271         if (r < 0)
1272                 return r;
1273
1274         return trigger_device(m, d);
1275 }
1276
1277 static int flush_devices(Manager *m) {
1278         _cleanup_closedir_ DIR *d;
1279
1280         assert(m);
1281
1282         d = opendir("/etc/udev/rules.d");
1283         if (!d) {
1284                 if (errno != ENOENT)
1285                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1286         } else {
1287                 struct dirent *de;
1288
1289                 FOREACH_DIRENT_ALL(de, d, break) {
1290                         if (!dirent_is_file(de))
1291                                 continue;
1292
1293                         if (!startswith(de->d_name, "72-seat-"))
1294                                 continue;
1295
1296                         if (!endswith(de->d_name, ".rules"))
1297                                 continue;
1298
1299                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1300                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1301                 }
1302         }
1303
1304         return trigger_device(m, NULL);
1305 }
1306
1307 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1308         const char *sysfs, *seat;
1309         Manager *m = userdata;
1310         int interactive, r;
1311
1312         assert(message);
1313         assert(m);
1314
1315         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1316         if (r < 0)
1317                 return r;
1318
1319         if (!path_startswith(sysfs, "/sys"))
1320                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1321
1322         if (!seat_name_is_valid(seat))
1323                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1324
1325         r = bus_verify_polkit_async(
1326                         message,
1327                         CAP_SYS_ADMIN,
1328                         "org.freedesktop.login1.attach-device",
1329                         NULL,
1330                         interactive,
1331                         UID_INVALID,
1332                         &m->polkit_registry,
1333                         error);
1334         if (r < 0)
1335                 return r;
1336         if (r == 0)
1337                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1338
1339         r = attach_device(m, seat, sysfs);
1340         if (r < 0)
1341                 return r;
1342
1343         return sd_bus_reply_method_return(message, NULL);
1344 }
1345
1346 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1347         Manager *m = userdata;
1348         int interactive, r;
1349
1350         assert(message);
1351         assert(m);
1352
1353         r = sd_bus_message_read(message, "b", &interactive);
1354         if (r < 0)
1355                 return r;
1356
1357         r = bus_verify_polkit_async(
1358                         message,
1359                         CAP_SYS_ADMIN,
1360                         "org.freedesktop.login1.flush-devices",
1361                         NULL,
1362                         interactive,
1363                         UID_INVALID,
1364                         &m->polkit_registry,
1365                         error);
1366         if (r < 0)
1367                 return r;
1368         if (r == 0)
1369                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1370
1371         r = flush_devices(m);
1372         if (r < 0)
1373                 return r;
1374
1375         return sd_bus_reply_method_return(message, NULL);
1376 }
1377
1378 static int have_multiple_sessions(
1379                 Manager *m,
1380                 uid_t uid) {
1381
1382         Session *session;
1383         Iterator i;
1384
1385         assert(m);
1386
1387         /* Check for other users' sessions. Greeter sessions do not
1388          * count, and non-login sessions do not count either. */
1389         HASHMAP_FOREACH(session, m->sessions, i)
1390                 if (session->class == SESSION_USER &&
1391                     session->user->uid != uid)
1392                         return true;
1393
1394         return false;
1395 }
1396
1397 static int bus_manager_log_shutdown(
1398                 Manager *m,
1399                 InhibitWhat w,
1400                 const char *unit_name) {
1401
1402         const char *p, *q;
1403
1404         assert(m);
1405         assert(unit_name);
1406
1407         if (w != INHIBIT_SHUTDOWN)
1408                 return 0;
1409
1410         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1411                 p = "MESSAGE=System is powering down";
1412                 q = "SHUTDOWN=power-off";
1413         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1414                 p = "MESSAGE=System is halting";
1415                 q = "SHUTDOWN=halt";
1416         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1417                 p = "MESSAGE=System is rebooting";
1418                 q = "SHUTDOWN=reboot";
1419         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1420                 p = "MESSAGE=System is rebooting with kexec";
1421                 q = "SHUTDOWN=kexec";
1422         } else {
1423                 p = "MESSAGE=System is shutting down";
1424                 q = NULL;
1425         }
1426
1427         if (isempty(m->wall_message))
1428                 p = strjoina(p, ".");
1429         else
1430                 p = strjoina(p, " (", m->wall_message, ").");
1431
1432         return log_struct(LOG_NOTICE,
1433                           LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
1434                           p,
1435                           q,
1436                           NULL);
1437 }
1438
1439 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1440         Manager *m = userdata;
1441
1442         assert(e);
1443         assert(m);
1444
1445         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1446         return 0;
1447 }
1448
1449 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1450         int r;
1451
1452         assert(m);
1453
1454         if (until <= now(CLOCK_MONOTONIC))
1455                 return 0;
1456
1457         /* We want to ignore the lid switch for a while after each
1458          * suspend, and after boot-up. Hence let's install a timer for
1459          * this. As long as the event source exists we ignore the lid
1460          * switch. */
1461
1462         if (m->lid_switch_ignore_event_source) {
1463                 usec_t u;
1464
1465                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1466                 if (r < 0)
1467                         return r;
1468
1469                 if (until <= u)
1470                         return 0;
1471
1472                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1473         } else
1474                 r = sd_event_add_time(
1475                                 m->event,
1476                                 &m->lid_switch_ignore_event_source,
1477                                 CLOCK_MONOTONIC,
1478                                 until, 0,
1479                                 lid_switch_ignore_handler, m);
1480
1481         return r;
1482 }
1483
1484 static void reset_scheduled_shutdown(Manager *m) {
1485         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1486         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1487         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1488         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1489         m->scheduled_shutdown_timeout = 0;
1490         m->shutdown_dry_run = false;
1491
1492         if (m->unlink_nologin) {
1493                 (void) unlink("/run/nologin");
1494                 m->unlink_nologin = false;
1495         }
1496 }
1497
1498 static int execute_shutdown_or_sleep(
1499                 Manager *m,
1500                 InhibitWhat w,
1501                 const char *unit_name,
1502                 sd_bus_error *error) {
1503
1504         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1505         char *c = NULL;
1506         const char *p;
1507         int r;
1508
1509         assert(m);
1510         assert(w >= 0);
1511         assert(w < _INHIBIT_WHAT_MAX);
1512         assert(unit_name);
1513
1514         bus_manager_log_shutdown(m, w, unit_name);
1515
1516         if (m->shutdown_dry_run) {
1517                 log_info("Running in dry run, suppressing action.");
1518                 reset_scheduled_shutdown(m);
1519         } else {
1520                 r = sd_bus_call_method(
1521                                 m->bus,
1522                                 "org.freedesktop.systemd1",
1523                                 "/org/freedesktop/systemd1",
1524                                 "org.freedesktop.systemd1.Manager",
1525                                 "StartUnit",
1526                                 error,
1527                                 &reply,
1528                                 "ss", unit_name, "replace-irreversibly");
1529                 if (r < 0)
1530                         return r;
1531
1532                 r = sd_bus_message_read(reply, "o", &p);
1533                 if (r < 0)
1534                         return r;
1535
1536                 c = strdup(p);
1537                 if (!c)
1538                         return -ENOMEM;
1539         }
1540
1541         m->action_unit = unit_name;
1542         free(m->action_job);
1543         m->action_job = c;
1544         m->action_what = w;
1545
1546         /* Make sure the lid switch is ignored for a while */
1547         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1548
1549         return 0;
1550 }
1551
1552 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1553
1554         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1555         Inhibitor *offending = NULL;
1556         int r;
1557
1558         assert(manager);
1559
1560         if (manager->action_what == 0 || manager->action_job)
1561                 return 0;
1562
1563         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1564                 _cleanup_free_ char *comm = NULL, *u = NULL;
1565
1566                 if (!timeout)
1567                         return 0;
1568
1569                 (void) get_process_comm(offending->pid, &comm);
1570                 u = uid_to_name(offending->uid);
1571
1572                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1573                            offending->uid, strna(u),
1574                            offending->pid, strna(comm));
1575         }
1576
1577         /* Actually do the operation */
1578         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1579         if (r < 0) {
1580                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1581
1582                 manager->action_unit = NULL;
1583                 manager->action_what = 0;
1584                 return r;
1585         }
1586
1587         return 1;
1588 }
1589
1590 static int manager_inhibit_timeout_handler(
1591                         sd_event_source *s,
1592                         uint64_t usec,
1593                         void *userdata) {
1594
1595         Manager *manager = userdata;
1596         int r;
1597
1598         assert(manager);
1599         assert(manager->inhibit_timeout_source == s);
1600
1601         r = manager_dispatch_delayed(manager, true);
1602         return (r < 0) ? r : 0;
1603 }
1604
1605 static int delay_shutdown_or_sleep(
1606                 Manager *m,
1607                 InhibitWhat w,
1608                 const char *unit_name) {
1609
1610         int r;
1611         usec_t timeout_val;
1612
1613         assert(m);
1614         assert(w >= 0);
1615         assert(w < _INHIBIT_WHAT_MAX);
1616         assert(unit_name);
1617
1618         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1619
1620         if (m->inhibit_timeout_source) {
1621                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1622                 if (r < 0)
1623                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1624
1625                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1626                 if (r < 0)
1627                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1628         } else {
1629                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1630                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1631                 if (r < 0)
1632                         return r;
1633         }
1634
1635         m->action_unit = unit_name;
1636         m->action_what = w;
1637
1638         return 0;
1639 }
1640
1641 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1642
1643         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1644                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1645                 [INHIBIT_SLEEP] = "PrepareForSleep"
1646         };
1647
1648         int active = _active;
1649
1650         assert(m);
1651         assert(w >= 0);
1652         assert(w < _INHIBIT_WHAT_MAX);
1653         assert(signal_name[w]);
1654
1655         return sd_bus_emit_signal(m->bus,
1656                                   "/org/freedesktop/login1",
1657                                   "org.freedesktop.login1.Manager",
1658                                   signal_name[w],
1659                                   "b",
1660                                   active);
1661 }
1662
1663 int bus_manager_shutdown_or_sleep_now_or_later(
1664                 Manager *m,
1665                 const char *unit_name,
1666                 InhibitWhat w,
1667                 sd_bus_error *error) {
1668
1669         bool delayed;
1670         int r;
1671
1672         assert(m);
1673         assert(unit_name);
1674         assert(w >= 0);
1675         assert(w <= _INHIBIT_WHAT_MAX);
1676         assert(!m->action_job);
1677
1678         /* Tell everybody to prepare for shutdown/sleep */
1679         send_prepare_for(m, w, true);
1680
1681         delayed =
1682                 m->inhibit_delay_max > 0 &&
1683                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1684
1685         if (delayed)
1686                 /* Shutdown is delayed, keep in mind what we
1687                  * want to do, and start a timeout */
1688                 r = delay_shutdown_or_sleep(m, w, unit_name);
1689         else
1690                 /* Shutdown is not delayed, execute it
1691                  * immediately */
1692                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1693
1694         return r;
1695 }
1696
1697 static int verify_shutdown_creds(
1698                 Manager *m,
1699                 sd_bus_message *message,
1700                 InhibitWhat w,
1701                 bool interactive,
1702                 const char *action,
1703                 const char *action_multiple_sessions,
1704                 const char *action_ignore_inhibit,
1705                 sd_bus_error *error) {
1706
1707         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1708         bool multiple_sessions, blocked;
1709         uid_t uid;
1710         int r;
1711
1712         assert(m);
1713         assert(message);
1714         assert(w >= 0);
1715         assert(w <= _INHIBIT_WHAT_MAX);
1716
1717         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1718         if (r < 0)
1719                 return r;
1720
1721         r = sd_bus_creds_get_euid(creds, &uid);
1722         if (r < 0)
1723                 return r;
1724
1725         r = have_multiple_sessions(m, uid);
1726         if (r < 0)
1727                 return r;
1728
1729         multiple_sessions = r > 0;
1730         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1731
1732         if (multiple_sessions && action_multiple_sessions) {
1733                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, 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         if (blocked && action_ignore_inhibit) {
1741                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1742                 if (r < 0)
1743                         return r;
1744                 if (r == 0)
1745                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1746         }
1747
1748         if (!multiple_sessions && !blocked && action) {
1749                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1750                 if (r < 0)
1751                         return r;
1752                 if (r == 0)
1753                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1754         }
1755
1756         return 0;
1757 }
1758
1759 static int method_do_shutdown_or_sleep(
1760                 Manager *m,
1761                 sd_bus_message *message,
1762                 const char *unit_name,
1763                 InhibitWhat w,
1764                 const char *action,
1765                 const char *action_multiple_sessions,
1766                 const char *action_ignore_inhibit,
1767                 const char *sleep_verb,
1768                 sd_bus_error *error) {
1769
1770         int interactive, r;
1771
1772         assert(m);
1773         assert(message);
1774         assert(unit_name);
1775         assert(w >= 0);
1776         assert(w <= _INHIBIT_WHAT_MAX);
1777
1778         r = sd_bus_message_read(message, "b", &interactive);
1779         if (r < 0)
1780                 return r;
1781
1782         /* Don't allow multiple jobs being executed at the same time */
1783         if (m->action_what)
1784                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1785
1786         if (sleep_verb) {
1787                 r = can_sleep(sleep_verb);
1788                 if (r < 0)
1789                         return r;
1790
1791                 if (r == 0)
1792                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1793         }
1794
1795         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1796                                   action_ignore_inhibit, error);
1797         if (r != 0)
1798                 return r;
1799
1800         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1801         if (r < 0)
1802                 return r;
1803
1804         return sd_bus_reply_method_return(message, NULL);
1805 }
1806
1807 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1808         Manager *m = userdata;
1809
1810         return method_do_shutdown_or_sleep(
1811                         m, message,
1812                         SPECIAL_POWEROFF_TARGET,
1813                         INHIBIT_SHUTDOWN,
1814                         "org.freedesktop.login1.power-off",
1815                         "org.freedesktop.login1.power-off-multiple-sessions",
1816                         "org.freedesktop.login1.power-off-ignore-inhibit",
1817                         NULL,
1818                         error);
1819 }
1820
1821 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1822         Manager *m = userdata;
1823
1824         return method_do_shutdown_or_sleep(
1825                         m, message,
1826                         SPECIAL_REBOOT_TARGET,
1827                         INHIBIT_SHUTDOWN,
1828                         "org.freedesktop.login1.reboot",
1829                         "org.freedesktop.login1.reboot-multiple-sessions",
1830                         "org.freedesktop.login1.reboot-ignore-inhibit",
1831                         NULL,
1832                         error);
1833 }
1834
1835 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1836         Manager *m = userdata;
1837
1838         return method_do_shutdown_or_sleep(
1839                         m, message,
1840                         SPECIAL_SUSPEND_TARGET,
1841                         INHIBIT_SLEEP,
1842                         "org.freedesktop.login1.suspend",
1843                         "org.freedesktop.login1.suspend-multiple-sessions",
1844                         "org.freedesktop.login1.suspend-ignore-inhibit",
1845                         "suspend",
1846                         error);
1847 }
1848
1849 static int nologin_timeout_handler(
1850                         sd_event_source *s,
1851                         uint64_t usec,
1852                         void *userdata) {
1853
1854         Manager *m = userdata;
1855         int r;
1856
1857         log_info("Creating /run/nologin, blocking further logins...");
1858
1859         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1860         if (r < 0)
1861                 log_error_errno(r, "Failed to create /run/nologin: %m");
1862         else
1863                 m->unlink_nologin = true;
1864
1865         return 0;
1866 }
1867
1868 static int update_schedule_file(Manager *m) {
1869         _cleanup_free_ char *temp_path = NULL;
1870         _cleanup_fclose_ FILE *f = NULL;
1871         int r;
1872
1873         assert(m);
1874
1875         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1876         if (r < 0)
1877                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1878
1879         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1880         if (r < 0)
1881                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1882
1883         (void) fchmod(fileno(f), 0644);
1884
1885         fprintf(f,
1886                 "USEC="USEC_FMT"\n"
1887                 "WARN_WALL=%i\n"
1888                 "MODE=%s\n",
1889                 m->scheduled_shutdown_timeout,
1890                 m->enable_wall_messages,
1891                 m->scheduled_shutdown_type);
1892
1893         if (!isempty(m->wall_message)) {
1894                 _cleanup_free_ char *t;
1895
1896                 t = cescape(m->wall_message);
1897                 if (!t) {
1898                         r = -ENOMEM;
1899                         goto fail;
1900                 }
1901
1902                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1903         }
1904
1905         r = fflush_and_check(f);
1906         if (r < 0)
1907                 goto fail;
1908
1909         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1910                 r = -errno;
1911                 goto fail;
1912         }
1913
1914         return 0;
1915
1916 fail:
1917         (void) unlink(temp_path);
1918         (void) unlink("/run/systemd/shutdown/scheduled");
1919
1920         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
1921 }
1922
1923 static int manager_scheduled_shutdown_handler(
1924                         sd_event_source *s,
1925                         uint64_t usec,
1926                         void *userdata) {
1927
1928         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1929         Manager *m = userdata;
1930         const char *target;
1931         int r;
1932
1933         assert(m);
1934
1935         if (isempty(m->scheduled_shutdown_type))
1936                 return 0;
1937
1938         if (streq(m->scheduled_shutdown_type, "halt"))
1939                 target = SPECIAL_HALT_TARGET;
1940         else if (streq(m->scheduled_shutdown_type, "poweroff"))
1941                 target = SPECIAL_POWEROFF_TARGET;
1942         else
1943                 target = SPECIAL_REBOOT_TARGET;
1944
1945         r = execute_shutdown_or_sleep(m, 0, target, &error);
1946         if (r < 0)
1947                 return log_error_errno(r, "Unable to execute transition to %s: %m", target);
1948
1949         return 0;
1950 }
1951
1952 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1953         Manager *m = userdata;
1954         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1955         const char *action_multiple_sessions = NULL;
1956         const char *action_ignore_inhibit = NULL;
1957         const char *action = NULL;
1958         uint64_t elapse;
1959         char *type;
1960         int r;
1961
1962         assert(m);
1963         assert(message);
1964
1965         r = sd_bus_message_read(message, "st", &type, &elapse);
1966         if (r < 0)
1967                 return r;
1968
1969         if (startswith(type, "dry-")) {
1970                 type += 4;
1971                 m->shutdown_dry_run = true;
1972         }
1973
1974         if (streq(type, "reboot")) {
1975                 action = "org.freedesktop.login1.reboot";
1976                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
1977                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
1978         } else if (streq(type, "halt")) {
1979                 action = "org.freedesktop.login1.halt";
1980                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
1981                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
1982         } else if (streq(type, "poweroff")) {
1983                 action = "org.freedesktop.login1.power-off";
1984                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
1985                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
1986         } else
1987                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
1988
1989         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
1990                                   action, action_multiple_sessions, action_ignore_inhibit, error);
1991         if (r != 0)
1992                 return r;
1993
1994         if (m->scheduled_shutdown_timeout_source) {
1995                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
1996                 if (r < 0)
1997                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1998
1999                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2000                 if (r < 0)
2001                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2002         } else {
2003                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2004                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2005                 if (r < 0)
2006                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2007         }
2008
2009         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2010         if (r < 0) {
2011                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2012                 return log_oom();
2013         }
2014
2015         if (m->nologin_timeout_source) {
2016                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2017                 if (r < 0)
2018                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2019
2020                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2021                 if (r < 0)
2022                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2023         } else {
2024                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2025                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2026                 if (r < 0)
2027                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2028         }
2029
2030         m->scheduled_shutdown_timeout = elapse;
2031
2032         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2033         if (r >= 0) {
2034                 const char *tty = NULL;
2035
2036                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2037                 (void) sd_bus_creds_get_tty(creds, &tty);
2038
2039                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2040                 if (r < 0) {
2041                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2042                         return log_oom();
2043                 }
2044         }
2045
2046         r = manager_setup_wall_message_timer(m);
2047         if (r < 0)
2048                 return r;
2049
2050         if (!isempty(type)) {
2051                 r = update_schedule_file(m);
2052                 if (r < 0)
2053                         return r;
2054         } else
2055                 (void) unlink("/run/systemd/shutdown/scheduled");
2056
2057         return sd_bus_reply_method_return(message, NULL);
2058 }
2059
2060 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2061         Manager *m = userdata;
2062         bool cancelled;
2063
2064         assert(m);
2065         assert(message);
2066
2067         cancelled = m->scheduled_shutdown_type != NULL;
2068         reset_scheduled_shutdown(m);
2069
2070         if (cancelled) {
2071                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2072                 const char *tty = NULL;
2073                 uid_t uid = 0;
2074                 int r;
2075
2076                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2077                 if (r >= 0) {
2078                         (void) sd_bus_creds_get_uid(creds, &uid);
2079                         (void) sd_bus_creds_get_tty(creds, &tty);
2080                 }
2081
2082                 utmp_wall("The system shutdown has been cancelled",
2083                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2084         }
2085
2086         return sd_bus_reply_method_return(message, "b", cancelled);
2087 }
2088
2089 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2090         Manager *m = userdata;
2091
2092         return method_do_shutdown_or_sleep(
2093                         m, message,
2094                         SPECIAL_HIBERNATE_TARGET,
2095                         INHIBIT_SLEEP,
2096                         "org.freedesktop.login1.hibernate",
2097                         "org.freedesktop.login1.hibernate-multiple-sessions",
2098                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2099                         "hibernate",
2100                         error);
2101 }
2102
2103 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2104         Manager *m = userdata;
2105
2106         return method_do_shutdown_or_sleep(
2107                         m, message,
2108                         SPECIAL_HYBRID_SLEEP_TARGET,
2109                         INHIBIT_SLEEP,
2110                         "org.freedesktop.login1.hibernate",
2111                         "org.freedesktop.login1.hibernate-multiple-sessions",
2112                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2113                         "hybrid-sleep",
2114                         error);
2115 }
2116
2117 static int method_can_shutdown_or_sleep(
2118                 Manager *m,
2119                 sd_bus_message *message,
2120                 InhibitWhat w,
2121                 const char *action,
2122                 const char *action_multiple_sessions,
2123                 const char *action_ignore_inhibit,
2124                 const char *sleep_verb,
2125                 sd_bus_error *error) {
2126
2127         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2128         bool multiple_sessions, challenge, blocked;
2129         const char *result = NULL;
2130         uid_t uid;
2131         int r;
2132
2133         assert(m);
2134         assert(message);
2135         assert(w >= 0);
2136         assert(w <= _INHIBIT_WHAT_MAX);
2137         assert(action);
2138         assert(action_multiple_sessions);
2139         assert(action_ignore_inhibit);
2140
2141         if (sleep_verb) {
2142                 r = can_sleep(sleep_verb);
2143                 if (r < 0)
2144                         return r;
2145                 if (r == 0)
2146                         return sd_bus_reply_method_return(message, "s", "na");
2147         }
2148
2149         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2150         if (r < 0)
2151                 return r;
2152
2153         r = sd_bus_creds_get_euid(creds, &uid);
2154         if (r < 0)
2155                 return r;
2156
2157         r = have_multiple_sessions(m, uid);
2158         if (r < 0)
2159                 return r;
2160
2161         multiple_sessions = r > 0;
2162         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2163
2164         if (multiple_sessions) {
2165                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2166                 if (r < 0)
2167                         return r;
2168
2169                 if (r > 0)
2170                         result = "yes";
2171                 else if (challenge)
2172                         result = "challenge";
2173                 else
2174                         result = "no";
2175         }
2176
2177         if (blocked) {
2178                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2179                 if (r < 0)
2180                         return r;
2181
2182                 if (r > 0 && !result)
2183                         result = "yes";
2184                 else if (challenge && (!result || streq(result, "yes")))
2185                         result = "challenge";
2186                 else
2187                         result = "no";
2188         }
2189
2190         if (!multiple_sessions && !blocked) {
2191                 /* If neither inhibit nor multiple sessions
2192                  * apply then just check the normal policy */
2193
2194                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2195                 if (r < 0)
2196                         return r;
2197
2198                 if (r > 0)
2199                         result = "yes";
2200                 else if (challenge)
2201                         result = "challenge";
2202                 else
2203                         result = "no";
2204         }
2205
2206         return sd_bus_reply_method_return(message, "s", result);
2207 }
2208
2209 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2210         Manager *m = userdata;
2211
2212         return method_can_shutdown_or_sleep(
2213                         m, message,
2214                         INHIBIT_SHUTDOWN,
2215                         "org.freedesktop.login1.power-off",
2216                         "org.freedesktop.login1.power-off-multiple-sessions",
2217                         "org.freedesktop.login1.power-off-ignore-inhibit",
2218                         NULL,
2219                         error);
2220 }
2221
2222 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2223         Manager *m = userdata;
2224
2225         return method_can_shutdown_or_sleep(
2226                         m, message,
2227                         INHIBIT_SHUTDOWN,
2228                         "org.freedesktop.login1.reboot",
2229                         "org.freedesktop.login1.reboot-multiple-sessions",
2230                         "org.freedesktop.login1.reboot-ignore-inhibit",
2231                         NULL,
2232                         error);
2233 }
2234
2235 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2236         Manager *m = userdata;
2237
2238         return method_can_shutdown_or_sleep(
2239                         m, message,
2240                         INHIBIT_SLEEP,
2241                         "org.freedesktop.login1.suspend",
2242                         "org.freedesktop.login1.suspend-multiple-sessions",
2243                         "org.freedesktop.login1.suspend-ignore-inhibit",
2244                         "suspend",
2245                         error);
2246 }
2247
2248 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2249         Manager *m = userdata;
2250
2251         return method_can_shutdown_or_sleep(
2252                         m, message,
2253                         INHIBIT_SLEEP,
2254                         "org.freedesktop.login1.hibernate",
2255                         "org.freedesktop.login1.hibernate-multiple-sessions",
2256                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2257                         "hibernate",
2258                         error);
2259 }
2260
2261 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2262         Manager *m = userdata;
2263
2264         return method_can_shutdown_or_sleep(
2265                         m, message,
2266                         INHIBIT_SLEEP,
2267                         "org.freedesktop.login1.hibernate",
2268                         "org.freedesktop.login1.hibernate-multiple-sessions",
2269                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2270                         "hybrid-sleep",
2271                         error);
2272 }
2273
2274 static int property_get_reboot_to_firmware_setup(
2275                 sd_bus *bus,
2276                 const char *path,
2277                 const char *interface,
2278                 const char *property,
2279                 sd_bus_message *reply,
2280                 void *userdata,
2281                 sd_bus_error *error) {
2282         int r;
2283
2284         assert(bus);
2285         assert(reply);
2286         assert(userdata);
2287
2288         r = efi_get_reboot_to_firmware();
2289         if (r < 0 && r != -EOPNOTSUPP)
2290                 return r;
2291
2292         return sd_bus_message_append(reply, "b", r > 0);
2293 }
2294
2295 static int method_set_reboot_to_firmware_setup(
2296                 sd_bus_message *message,
2297                 void *userdata,
2298                 sd_bus_error *error) {
2299
2300         int b, r;
2301         Manager *m = userdata;
2302
2303         assert(message);
2304         assert(m);
2305
2306         r = sd_bus_message_read(message, "b", &b);
2307         if (r < 0)
2308                 return r;
2309
2310         r = bus_verify_polkit_async(message,
2311                                     CAP_SYS_ADMIN,
2312                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2313                                     NULL,
2314                                     false,
2315                                     UID_INVALID,
2316                                     &m->polkit_registry,
2317                                     error);
2318         if (r < 0)
2319                 return r;
2320         if (r == 0)
2321                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2322
2323         r = efi_set_reboot_to_firmware(b);
2324         if (r < 0)
2325                 return r;
2326
2327         return sd_bus_reply_method_return(message, NULL);
2328 }
2329
2330 static int method_can_reboot_to_firmware_setup(
2331                 sd_bus_message *message,
2332                 void *userdata,
2333                 sd_bus_error *error) {
2334
2335         int r;
2336         bool challenge;
2337         const char *result;
2338         Manager *m = userdata;
2339
2340         assert(message);
2341         assert(m);
2342
2343         r = efi_reboot_to_firmware_supported();
2344         if (r == -EOPNOTSUPP)
2345                 return sd_bus_reply_method_return(message, "s", "na");
2346         else if (r < 0)
2347                 return r;
2348
2349         r = bus_test_polkit(message,
2350                             CAP_SYS_ADMIN,
2351                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2352                             NULL,
2353                             UID_INVALID,
2354                             &challenge,
2355                             error);
2356         if (r < 0)
2357                 return r;
2358
2359         if (r > 0)
2360                 result = "yes";
2361         else if (challenge)
2362                 result = "challenge";
2363         else
2364                 result = "no";
2365
2366         return sd_bus_reply_method_return(message, "s", result);
2367 }
2368
2369 static int method_set_wall_message(
2370                 sd_bus_message *message,
2371                 void *userdata,
2372                 sd_bus_error *error) {
2373
2374         int r;
2375         Manager *m = userdata;
2376         char *wall_message;
2377         int enable_wall_messages;
2378
2379         assert(message);
2380         assert(m);
2381
2382         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2383         if (r < 0)
2384                 return r;
2385
2386         r = bus_verify_polkit_async(message,
2387                                     CAP_SYS_ADMIN,
2388                                     "org.freedesktop.login1.set-wall-message",
2389                                     NULL,
2390                                     false,
2391                                     UID_INVALID,
2392                                     &m->polkit_registry,
2393                                     error);
2394         if (r < 0)
2395                 return r;
2396         if (r == 0)
2397                 return 1; /* Will call us back */
2398
2399         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2400         if (r < 0)
2401                 return log_oom();
2402
2403         m->enable_wall_messages = enable_wall_messages;
2404
2405         return sd_bus_reply_method_return(message, NULL);
2406 }
2407
2408 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2409         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2410         const char *who, *why, *what, *mode;
2411         _cleanup_free_ char *id = NULL;
2412         _cleanup_close_ int fifo_fd = -1;
2413         Manager *m = userdata;
2414         Inhibitor *i = NULL;
2415         InhibitMode mm;
2416         InhibitWhat w;
2417         pid_t pid;
2418         uid_t uid;
2419         int r;
2420
2421         assert(message);
2422         assert(m);
2423
2424         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2425         if (r < 0)
2426                 return r;
2427
2428         w = inhibit_what_from_string(what);
2429         if (w <= 0)
2430                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2431
2432         mm = inhibit_mode_from_string(mode);
2433         if (mm < 0)
2434                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2435
2436         /* Delay is only supported for shutdown/sleep */
2437         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2438                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2439
2440         /* Don't allow taking delay locks while we are already
2441          * executing the operation. We shouldn't create the impression
2442          * that the lock was successful if the machine is about to go
2443          * down/suspend any moment. */
2444         if (m->action_what & w)
2445                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2446
2447         r = bus_verify_polkit_async(
2448                         message,
2449                         CAP_SYS_BOOT,
2450                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2451                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2452                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2453                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2454                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2455                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2456                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2457                         NULL,
2458                         false,
2459                         UID_INVALID,
2460                         &m->polkit_registry,
2461                         error);
2462         if (r < 0)
2463                 return r;
2464         if (r == 0)
2465                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2466
2467         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2468         if (r < 0)
2469                 return r;
2470
2471         r = sd_bus_creds_get_euid(creds, &uid);
2472         if (r < 0)
2473                 return r;
2474
2475         r = sd_bus_creds_get_pid(creds, &pid);
2476         if (r < 0)
2477                 return r;
2478
2479         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2480                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2481
2482         do {
2483                 id = mfree(id);
2484
2485                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2486                         return -ENOMEM;
2487
2488         } while (hashmap_get(m->inhibitors, id));
2489
2490         r = manager_add_inhibitor(m, id, &i);
2491         if (r < 0)
2492                 return r;
2493
2494         i->what = w;
2495         i->mode = mm;
2496         i->pid = pid;
2497         i->uid = uid;
2498         i->why = strdup(why);
2499         i->who = strdup(who);
2500
2501         if (!i->why || !i->who) {
2502                 r = -ENOMEM;
2503                 goto fail;
2504         }
2505
2506         fifo_fd = inhibitor_create_fifo(i);
2507         if (fifo_fd < 0) {
2508                 r = fifo_fd;
2509                 goto fail;
2510         }
2511
2512         inhibitor_start(i);
2513
2514         return sd_bus_reply_method_return(message, "h", fifo_fd);
2515
2516 fail:
2517         if (i)
2518                 inhibitor_free(i);
2519
2520         return r;
2521 }
2522
2523 const sd_bus_vtable manager_vtable[] = {
2524         SD_BUS_VTABLE_START(0),
2525
2526         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2527         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2528
2529         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2530         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2531         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2532         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2533         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2534         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2535         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2536         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2537         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2538         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2539         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2540         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2541         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2542         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2543         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2544         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2545         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2546         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2547         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2548         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2549         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2550         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2551         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2552         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2553         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2554         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2555         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2556         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2557         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2558         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2559
2560         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2561         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2562         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2563         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2564         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2565         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2566         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2567         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2568         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2569         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2570         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2571         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2572         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2573         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2574         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2575         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2576         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2577         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2578         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2579         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2580         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2581         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2582         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2583         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2584         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2585         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2586         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2587         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2588         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2589         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2590         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2591         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2592         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2593         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2594         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2595         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2596         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2597         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2598         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2599         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2600         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2601
2602         SD_BUS_SIGNAL("SessionNew", "so", 0),
2603         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2604         SD_BUS_SIGNAL("UserNew", "uo", 0),
2605         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2606         SD_BUS_SIGNAL("SeatNew", "so", 0),
2607         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2608         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2609         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2610
2611         SD_BUS_VTABLE_END
2612 };
2613
2614 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2615         int r = 0;
2616
2617         assert(s);
2618         assert(unit);
2619
2620         if (!s->started)
2621                 return r;
2622
2623         if (streq(result, "done"))
2624                 r = session_send_create_reply(s, NULL);
2625         else {
2626                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2627
2628                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2629                 r = session_send_create_reply(s, &e);
2630         }
2631
2632         return r;
2633 }
2634
2635 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2636         const char *path, *result, *unit;
2637         Manager *m = userdata;
2638         Session *session;
2639         uint32_t id;
2640         User *user;
2641         int r;
2642
2643         assert(message);
2644         assert(m);
2645
2646         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2647         if (r < 0) {
2648                 bus_log_parse_error(r);
2649                 return 0;
2650         }
2651
2652         if (m->action_job && streq(m->action_job, path)) {
2653                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2654
2655                 /* Tell people that they now may take a lock again */
2656                 send_prepare_for(m, m->action_what, false);
2657
2658                 m->action_job = mfree(m->action_job);
2659                 m->action_unit = NULL;
2660                 m->action_what = 0;
2661                 return 0;
2662         }
2663
2664         session = hashmap_get(m->session_units, unit);
2665         if (session && streq_ptr(path, session->scope_job)) {
2666                 session->scope_job = mfree(session->scope_job);
2667                 session_jobs_reply(session, unit, result);
2668
2669                 session_save(session);
2670                 user_save(session->user);
2671                 session_add_to_gc_queue(session);
2672         }
2673
2674         user = hashmap_get(m->user_units, unit);
2675         if (user &&
2676             (streq_ptr(path, user->service_job) ||
2677              streq_ptr(path, user->slice_job))) {
2678
2679                 if (streq_ptr(path, user->service_job))
2680                         user->service_job = mfree(user->service_job);
2681
2682                 if (streq_ptr(path, user->slice_job))
2683                         user->slice_job = mfree(user->slice_job);
2684
2685                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2686                         session_jobs_reply(session, unit, result);
2687
2688                 user_save(user);
2689                 user_add_to_gc_queue(user);
2690         }
2691
2692         return 0;
2693 }
2694
2695 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2696         const char *path, *unit;
2697         Manager *m = userdata;
2698         Session *session;
2699         User *user;
2700         int r;
2701
2702         assert(message);
2703         assert(m);
2704
2705         r = sd_bus_message_read(message, "so", &unit, &path);
2706         if (r < 0) {
2707                 bus_log_parse_error(r);
2708                 return 0;
2709         }
2710
2711         session = hashmap_get(m->session_units, unit);
2712         if (session)
2713                 session_add_to_gc_queue(session);
2714
2715         user = hashmap_get(m->user_units, unit);
2716         if (user)
2717                 user_add_to_gc_queue(user);
2718
2719         return 0;
2720 }
2721
2722 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2723         _cleanup_free_ char *unit = NULL;
2724         Manager *m = userdata;
2725         const char *path;
2726         Session *session;
2727         User *user;
2728         int r;
2729
2730         assert(message);
2731         assert(m);
2732
2733         path = sd_bus_message_get_path(message);
2734         if (!path)
2735                 return 0;
2736
2737         r = unit_name_from_dbus_path(path, &unit);
2738         if (r == -EINVAL) /* not a unit */
2739                 return 0;
2740         if (r < 0) {
2741                 log_oom();
2742                 return 0;
2743         }
2744
2745         session = hashmap_get(m->session_units, unit);
2746         if (session)
2747                 session_add_to_gc_queue(session);
2748
2749         user = hashmap_get(m->user_units, unit);
2750         if (user)
2751                 user_add_to_gc_queue(user);
2752
2753         return 0;
2754 }
2755
2756 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2757         Manager *m = userdata;
2758         Session *session;
2759         Iterator i;
2760         int b, r;
2761
2762         assert(message);
2763         assert(m);
2764
2765         r = sd_bus_message_read(message, "b", &b);
2766         if (r < 0) {
2767                 bus_log_parse_error(r);
2768                 return 0;
2769         }
2770
2771         if (b)
2772                 return 0;
2773
2774         /* systemd finished reloading, let's recheck all our sessions */
2775         log_debug("System manager has been reloaded, rechecking sessions...");
2776
2777         HASHMAP_FOREACH(session, m->sessions, i)
2778                 session_add_to_gc_queue(session);
2779
2780         return 0;
2781 }
2782
2783 int manager_send_changed(Manager *manager, const char *property, ...) {
2784         char **l;
2785
2786         assert(manager);
2787
2788         l = strv_from_stdarg_alloca(property);
2789
2790         return sd_bus_emit_properties_changed_strv(
2791                         manager->bus,
2792                         "/org/freedesktop/login1",
2793                         "org.freedesktop.login1.Manager",
2794                         l);
2795 }
2796
2797 static int strdup_job(sd_bus_message *reply, char **job) {
2798         const char *j;
2799         char *copy;
2800         int r;
2801
2802         r = sd_bus_message_read(reply, "o", &j);
2803         if (r < 0)
2804                 return r;
2805
2806         copy = strdup(j);
2807         if (!copy)
2808                 return -ENOMEM;
2809
2810         *job = copy;
2811         return 1;
2812 }
2813
2814 int manager_start_slice(
2815                 Manager *manager,
2816                 const char *slice,
2817                 const char *description,
2818                 const char *after,
2819                 const char *after2,
2820                 uint64_t tasks_max,
2821                 sd_bus_error *error,
2822                 char **job) {
2823
2824         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2825         int r;
2826
2827         assert(manager);
2828         assert(slice);
2829         assert(job);
2830
2831         r = sd_bus_message_new_method_call(
2832                         manager->bus,
2833                         &m,
2834                         "org.freedesktop.systemd1",
2835                         "/org/freedesktop/systemd1",
2836                         "org.freedesktop.systemd1.Manager",
2837                         "StartTransientUnit");
2838         if (r < 0)
2839                 return r;
2840
2841         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2842         if (r < 0)
2843                 return r;
2844
2845         r = sd_bus_message_open_container(m, 'a', "(sv)");
2846         if (r < 0)
2847                 return r;
2848
2849         if (!isempty(description)) {
2850                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2851                 if (r < 0)
2852                         return r;
2853         }
2854
2855         if (!isempty(after)) {
2856                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2857                 if (r < 0)
2858                         return r;
2859         }
2860
2861         if (!isempty(after2)) {
2862                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2863                 if (r < 0)
2864                         return r;
2865         }
2866
2867         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
2868         if (r < 0)
2869                 return r;
2870
2871         r = sd_bus_message_close_container(m);
2872         if (r < 0)
2873                 return r;
2874
2875         r = sd_bus_message_append(m, "a(sa(sv))", 0);
2876         if (r < 0)
2877                 return r;
2878
2879         r = sd_bus_call(manager->bus, m, 0, error, &reply);
2880         if (r < 0)
2881                 return r;
2882
2883         return strdup_job(reply, job);
2884 }
2885
2886 int manager_start_scope(
2887                 Manager *manager,
2888                 const char *scope,
2889                 pid_t pid,
2890                 const char *slice,
2891                 const char *description,
2892                 const char *after,
2893                 const char *after2,
2894                 uint64_t tasks_max,
2895                 sd_bus_error *error,
2896                 char **job) {
2897
2898         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2899         int r;
2900
2901         assert(manager);
2902         assert(scope);
2903         assert(pid > 1);
2904         assert(job);
2905
2906         r = sd_bus_message_new_method_call(
2907                         manager->bus,
2908                         &m,
2909                         "org.freedesktop.systemd1",
2910                         "/org/freedesktop/systemd1",
2911                         "org.freedesktop.systemd1.Manager",
2912                         "StartTransientUnit");
2913         if (r < 0)
2914                 return r;
2915
2916         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
2917         if (r < 0)
2918                 return r;
2919
2920         r = sd_bus_message_open_container(m, 'a', "(sv)");
2921         if (r < 0)
2922                 return r;
2923
2924         if (!isempty(slice)) {
2925                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
2926                 if (r < 0)
2927                         return r;
2928         }
2929
2930         if (!isempty(description)) {
2931                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2932                 if (r < 0)
2933                         return r;
2934         }
2935
2936         if (!isempty(after)) {
2937                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2938                 if (r < 0)
2939                         return r;
2940         }
2941
2942         if (!isempty(after2)) {
2943                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2944                 if (r < 0)
2945                         return r;
2946         }
2947
2948         /* cgroup empty notification is not available in containers
2949          * currently. To make this less problematic, let's shorten the
2950          * stop timeout for sessions, so that we don't wait
2951          * forever. */
2952
2953         /* Make sure that the session shells are terminated with
2954          * SIGHUP since bash and friends tend to ignore SIGTERM */
2955         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
2956         if (r < 0)
2957                 return r;
2958
2959         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
2960         if (r < 0)
2961                 return r;
2962
2963         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
2964         if (r < 0)
2965                 return r;
2966
2967         r = sd_bus_message_close_container(m);
2968         if (r < 0)
2969                 return r;
2970
2971         r = sd_bus_message_append(m, "a(sa(sv))", 0);
2972         if (r < 0)
2973                 return r;
2974
2975         r = sd_bus_call(manager->bus, m, 0, error, &reply);
2976         if (r < 0)
2977                 return r;
2978
2979         return strdup_job(reply, job);
2980 }
2981
2982 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
2983         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
2984         int r;
2985
2986         assert(manager);
2987         assert(unit);
2988         assert(job);
2989
2990         r = sd_bus_call_method(
2991                         manager->bus,
2992                         "org.freedesktop.systemd1",
2993                         "/org/freedesktop/systemd1",
2994                         "org.freedesktop.systemd1.Manager",
2995                         "StartUnit",
2996                         error,
2997                         &reply,
2998                         "ss", unit, "replace");
2999         if (r < 0)
3000                 return r;
3001
3002         return strdup_job(reply, job);
3003 }
3004
3005 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3006         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3007         int r;
3008
3009         assert(manager);
3010         assert(unit);
3011         assert(job);
3012
3013         r = sd_bus_call_method(
3014                         manager->bus,
3015                         "org.freedesktop.systemd1",
3016                         "/org/freedesktop/systemd1",
3017                         "org.freedesktop.systemd1.Manager",
3018                         "StopUnit",
3019                         error,
3020                         &reply,
3021                         "ss", unit, "fail");
3022         if (r < 0) {
3023                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3024                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3025
3026                         *job = NULL;
3027                         sd_bus_error_free(error);
3028                         return 0;
3029                 }
3030
3031                 return r;
3032         }
3033
3034         return strdup_job(reply, job);
3035 }
3036
3037 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3038         _cleanup_free_ char *path = NULL;
3039         int r;
3040
3041         assert(manager);
3042         assert(scope);
3043
3044         path = unit_dbus_path_from_name(scope);
3045         if (!path)
3046                 return -ENOMEM;
3047
3048         r = sd_bus_call_method(
3049                         manager->bus,
3050                         "org.freedesktop.systemd1",
3051                         path,
3052                         "org.freedesktop.systemd1.Scope",
3053                         "Abandon",
3054                         error,
3055                         NULL,
3056                         NULL);
3057         if (r < 0) {
3058                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3059                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3060                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3061                         sd_bus_error_free(error);
3062                         return 0;
3063                 }
3064
3065                 return r;
3066         }
3067
3068         return 1;
3069 }
3070
3071 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3072         assert(manager);
3073         assert(unit);
3074
3075         return sd_bus_call_method(
3076                         manager->bus,
3077                         "org.freedesktop.systemd1",
3078                         "/org/freedesktop/systemd1",
3079                         "org.freedesktop.systemd1.Manager",
3080                         "KillUnit",
3081                         error,
3082                         NULL,
3083                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3084 }
3085
3086 int manager_unit_is_active(Manager *manager, const char *unit) {
3087         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3088         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3089         _cleanup_free_ char *path = NULL;
3090         const char *state;
3091         int r;
3092
3093         assert(manager);
3094         assert(unit);
3095
3096         path = unit_dbus_path_from_name(unit);
3097         if (!path)
3098                 return -ENOMEM;
3099
3100         r = sd_bus_get_property(
3101                         manager->bus,
3102                         "org.freedesktop.systemd1",
3103                         path,
3104                         "org.freedesktop.systemd1.Unit",
3105                         "ActiveState",
3106                         &error,
3107                         &reply,
3108                         "s");
3109         if (r < 0) {
3110                 /* systemd might have droppped off momentarily, let's
3111                  * not make this an error */
3112                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3113                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3114                         return true;
3115
3116                 /* If the unit is already unloaded then it's not
3117                  * active */
3118                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3119                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3120                         return false;
3121
3122                 return r;
3123         }
3124
3125         r = sd_bus_message_read(reply, "s", &state);
3126         if (r < 0)
3127                 return -EINVAL;
3128
3129         return !streq(state, "inactive") && !streq(state, "failed");
3130 }
3131
3132 int manager_job_is_active(Manager *manager, const char *path) {
3133         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3134         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3135         int r;
3136
3137         assert(manager);
3138         assert(path);
3139
3140         r = sd_bus_get_property(
3141                         manager->bus,
3142                         "org.freedesktop.systemd1",
3143                         path,
3144                         "org.freedesktop.systemd1.Job",
3145                         "State",
3146                         &error,
3147                         &reply,
3148                         "s");
3149         if (r < 0) {
3150                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3151                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3152                         return true;
3153
3154                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3155                         return false;
3156
3157                 return r;
3158         }
3159
3160         /* We don't actually care about the state really. The fact
3161          * that we could read the job state is enough for us */
3162
3163         return true;
3164 }