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 "formats-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 /// Includes needed by elogind:
  54 #include "update-utmp.h"
  55
  56 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  57         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  58         Session *session;
  59         int r;
  60
  61         assert(m);
  62         assert(message);
  63         assert(ret);
  64
  65         if (isempty(name)) {
  66                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  67                 if (r < 0)
  68                         return r;
  69
  70                 r = sd_bus_creds_get_session(creds, &name);
  71                 if (r < 0)
  72                         return r;
  73         }
  74
  75         session = hashmap_get(m->sessions, name);
  76         if (!session)
  77                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  78
  79         *ret = session;
  80         return 0;
  81 }
  82
  83 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
  84         User *user;
  85         int r;
  86
  87         assert(m);
  88         assert(message);
  89         assert(ret);
  90
  91         if (uid == UID_INVALID) {
  92                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  93
  94                 /* Note that we get the owner UID of the session, not the actual client UID here! */
  95                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
  96                 if (r < 0)
  97                         return r;
  98
  99                 r = sd_bus_creds_get_owner_uid(creds, &uid);
 100                 if (r < 0)
 101                         return r;
 102         }
 103
 104         user = hashmap_get(m->users, UID_TO_PTR(uid));
 105         if (!user)
 106                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid);
 107
 108         *ret = user;
 109         return 0;
 110 }
 111
 112 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 113         Seat *seat;
 114         int r;
 115
 116         assert(m);
 117         assert(message);
 118         assert(ret);
 119
 120         if (isempty(name)) {
 121                 Session *session;
 122
 123                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 124                 if (r < 0)
 125                         return r;
 126
 127                 seat = session->seat;
 128                 if (!seat)
 129                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 130         } else {
 131                 seat = hashmap_get(m->seats, name);
 132                 if (!seat)
 133                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 134         }
 135
 136         *ret = seat;
 137         return 0;
 138 }
 139
 140 static int property_get_idle_hint(
 141                 sd_bus *bus,
 142                 const char *path,
 143                 const char *interface,
 144                 const char *property,
 145                 sd_bus_message *reply,
 146                 void *userdata,
 147                 sd_bus_error *error) {
 148
 149         Manager *m = userdata;
 150
 151         assert(bus);
 152         assert(reply);
 153         assert(m);
 154
 155         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 156 }
 157
 158 static int property_get_idle_since_hint(
 159                 sd_bus *bus,
 160                 const char *path,
 161                 const char *interface,
 162                 const char *property,
 163                 sd_bus_message *reply,
 164                 void *userdata,
 165                 sd_bus_error *error) {
 166
 167         Manager *m = userdata;
 168         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 169
 170         assert(bus);
 171         assert(reply);
 172         assert(m);
 173
 174         manager_get_idle_hint(m, &t);
 175
 176         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 177 }
 178
 179 static int property_get_inhibited(
 180                 sd_bus *bus,
 181                 const char *path,
 182                 const char *interface,
 183                 const char *property,
 184                 sd_bus_message *reply,
 185                 void *userdata,
 186                 sd_bus_error *error) {
 187
 188         Manager *m = userdata;
 189         InhibitWhat w;
 190
 191         assert(bus);
 192         assert(reply);
 193         assert(m);
 194
 195         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 196
 197         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 198 }
 199
 200 static int property_get_preparing(
 201                 sd_bus *bus,
 202                 const char *path,
 203                 const char *interface,
 204                 const char *property,
 205                 sd_bus_message *reply,
 206                 void *userdata,
 207                 sd_bus_error *error) {
 208
 209         Manager *m = userdata;
 210         bool b;
 211
 212         assert(bus);
 213         assert(reply);
 214         assert(m);
 215
 216         if (streq(property, "PreparingForShutdown"))
 217                 b = !!(m->action_what & INHIBIT_SHUTDOWN);
 218         else
 219                 b = !!(m->action_what & INHIBIT_SLEEP);
 220
 221         return sd_bus_message_append(reply, "b", b);
 222 }
 223
 224 static int property_get_scheduled_shutdown(
 225                 sd_bus *bus,
 226                 const char *path,
 227                 const char *interface,
 228                 const char *property,
 229                 sd_bus_message *reply,
 230                 void *userdata,
 231                 sd_bus_error *error) {
 232
 233         Manager *m = userdata;
 234         int r;
 235
 236         assert(bus);
 237         assert(reply);
 238         assert(m);
 239
 240         r = sd_bus_message_open_container(reply, 'r', "st");
 241         if (r < 0)
 242                 return r;
 243
 244         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 245         if (r < 0)
 246                 return r;
 247
 248         return sd_bus_message_close_container(reply);
 249 }
 250
 251 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 252
 253 static int property_get_docked(
 254                 sd_bus *bus,
 255                 const char *path,
 256                 const char *interface,
 257                 const char *property,
 258                 sd_bus_message *reply,
 259                 void *userdata,
 260                 sd_bus_error *error) {
 261
 262         Manager *m = userdata;
 263
 264         assert(bus);
 265         assert(reply);
 266         assert(m);
 267
 268         return sd_bus_message_append(reply, "b", manager_is_docked_or_external_displays(m));
 269 }
 270
 271 static int property_get_current_sessions(
 272                 sd_bus *bus,
 273                 const char *path,
 274                 const char *interface,
 275                 const char *property,
 276                 sd_bus_message *reply,
 277                 void *userdata,
 278                 sd_bus_error *error) {
 279
 280         Manager *m = userdata;
 281
 282         assert(bus);
 283         assert(reply);
 284         assert(m);
 285
 286         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->sessions));
 287 }
 288
 289 static int property_get_current_inhibitors(
 290                 sd_bus *bus,
 291                 const char *path,
 292                 const char *interface,
 293                 const char *property,
 294                 sd_bus_message *reply,
 295                 void *userdata,
 296                 sd_bus_error *error) {
 297
 298         Manager *m = userdata;
 299
 300         assert(bus);
 301         assert(reply);
 302         assert(m);
 303
 304         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->inhibitors));
 305 }
 306
 307 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 308         _cleanup_free_ char *p = NULL;
 309         Manager *m = userdata;
 310         const char *name;
 311         Session *session;
 312         int r;
 313
 314         assert(message);
 315         assert(m);
 316
 317         r = sd_bus_message_read(message, "s", &name);
 318         if (r < 0)
 319                 return r;
 320
 321         r = manager_get_session_from_creds(m, message, name, error, &session);
 322         if (r < 0)
 323                 return r;
 324
 325         p = session_bus_path(session);
 326         if (!p)
 327                 return -ENOMEM;
 328
 329         return sd_bus_reply_method_return(message, "o", p);
 330 }
 331
 332 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 333         _cleanup_free_ char *p = NULL;
 334         Session *session = NULL;
 335         Manager *m = userdata;
 336         pid_t pid;
 337         int r;
 338
 339         assert(message);
 340         assert(m);
 341
 342         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 343
 344         r = sd_bus_message_read(message, "u", &pid);
 345         if (r < 0)
 346                 return r;
 347         if (pid < 0)
 348                 return -EINVAL;
 349
 350         if (pid == 0) {
 351                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 352                 if (r < 0)
 353                         return r;
 354         } else {
 355                 r = manager_get_session_by_pid(m, pid, &session);
 356                 if (r < 0)
 357                         return r;
 358
 359                 if (!session)
 360                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 361         }
 362
 363         p = session_bus_path(session);
 364         if (!p)
 365                 return -ENOMEM;
 366
 367         return sd_bus_reply_method_return(message, "o", p);
 368 }
 369
 370 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 371         _cleanup_free_ char *p = NULL;
 372         Manager *m = userdata;
 373         uint32_t uid;
 374         User *user;
 375         int r;
 376
 377         assert(message);
 378         assert(m);
 379
 380         r = sd_bus_message_read(message, "u", &uid);
 381         if (r < 0)
 382                 return r;
 383
 384         r = manager_get_user_from_creds(m, message, uid, error, &user);
 385         if (r < 0)
 386                 return r;
 387
 388         p = user_bus_path(user);
 389         if (!p)
 390                 return -ENOMEM;
 391
 392         return sd_bus_reply_method_return(message, "o", p);
 393 }
 394
 395 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 396         _cleanup_free_ char *p = NULL;
 397         Manager *m = userdata;
 398         User *user = NULL;
 399         pid_t pid;
 400         int r;
 401
 402         assert(message);
 403         assert(m);
 404
 405         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 406
 407         r = sd_bus_message_read(message, "u", &pid);
 408         if (r < 0)
 409                 return r;
 410         if (pid < 0)
 411                 return -EINVAL;
 412
 413         if (pid == 0) {
 414                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 415                 if (r < 0)
 416                         return r;
 417         } else {
 418                 r = manager_get_user_by_pid(m, pid, &user);
 419                 if (r < 0)
 420                         return r;
 421                 if (!user)
 422                         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);
 423         }
 424
 425         p = user_bus_path(user);
 426         if (!p)
 427                 return -ENOMEM;
 428
 429         return sd_bus_reply_method_return(message, "o", p);
 430 }
 431
 432 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 433         _cleanup_free_ char *p = NULL;
 434         Manager *m = userdata;
 435         const char *name;
 436         Seat *seat;
 437         int r;
 438
 439         assert(message);
 440         assert(m);
 441
 442         r = sd_bus_message_read(message, "s", &name);
 443         if (r < 0)
 444                 return r;
 445
 446         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 447         if (r < 0)
 448                 return r;
 449
 450         p = seat_bus_path(seat);
 451         if (!p)
 452                 return -ENOMEM;
 453
 454         return sd_bus_reply_method_return(message, "o", p);
 455 }
 456
 457 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 458         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 459         Manager *m = userdata;
 460         Session *session;
 461         Iterator i;
 462         int r;
 463
 464         assert(message);
 465         assert(m);
 466
 467         r = sd_bus_message_new_method_return(message, &reply);
 468         if (r < 0)
 469                 return r;
 470
 471         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 472         if (r < 0)
 473                 return r;
 474
 475         HASHMAP_FOREACH(session, m->sessions, i) {
 476                 _cleanup_free_ char *p = NULL;
 477
 478                 p = session_bus_path(session);
 479                 if (!p)
 480                         return -ENOMEM;
 481
 482                 r = sd_bus_message_append(reply, "(susso)",
 483                                           session->id,
 484                                           (uint32_t) session->user->uid,
 485                                           session->user->name,
 486                                           session->seat ? session->seat->id : "",
 487                                           p);
 488                 if (r < 0)
 489                         return r;
 490         }
 491
 492         r = sd_bus_message_close_container(reply);
 493         if (r < 0)
 494                 return r;
 495
 496         return sd_bus_send(NULL, reply, NULL);
 497 }
 498
 499 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 500         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 501         Manager *m = userdata;
 502         User *user;
 503         Iterator i;
 504         int r;
 505
 506         assert(message);
 507         assert(m);
 508
 509         r = sd_bus_message_new_method_return(message, &reply);
 510         if (r < 0)
 511                 return r;
 512
 513         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 514         if (r < 0)
 515                 return r;
 516
 517         HASHMAP_FOREACH(user, m->users, i) {
 518                 _cleanup_free_ char *p = NULL;
 519
 520                 p = user_bus_path(user);
 521                 if (!p)
 522                         return -ENOMEM;
 523
 524                 r = sd_bus_message_append(reply, "(uso)",
 525                                           (uint32_t) user->uid,
 526                                           user->name,
 527                                           p);
 528                 if (r < 0)
 529                         return r;
 530         }
 531
 532         r = sd_bus_message_close_container(reply);
 533         if (r < 0)
 534                 return r;
 535
 536         return sd_bus_send(NULL, reply, NULL);
 537 }
 538
 539 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 540         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 541         Manager *m = userdata;
 542         Seat *seat;
 543         Iterator i;
 544         int r;
 545
 546         assert(message);
 547         assert(m);
 548
 549         r = sd_bus_message_new_method_return(message, &reply);
 550         if (r < 0)
 551                 return r;
 552
 553         r = sd_bus_message_open_container(reply, 'a', "(so)");
 554         if (r < 0)
 555                 return r;
 556
 557         HASHMAP_FOREACH(seat, m->seats, i) {
 558                 _cleanup_free_ char *p = NULL;
 559
 560                 p = seat_bus_path(seat);
 561                 if (!p)
 562                         return -ENOMEM;
 563
 564                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 565                 if (r < 0)
 566                         return r;
 567         }
 568
 569         r = sd_bus_message_close_container(reply);
 570         if (r < 0)
 571                 return r;
 572
 573         return sd_bus_send(NULL, reply, NULL);
 574 }
 575
 576 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 577         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 578         Manager *m = userdata;
 579         Inhibitor *inhibitor;
 580         Iterator i;
 581         int r;
 582
 583         assert(message);
 584         assert(m);
 585
 586         r = sd_bus_message_new_method_return(message, &reply);
 587         if (r < 0)
 588                 return r;
 589
 590         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 591         if (r < 0)
 592                 return r;
 593
 594         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 595
 596                 r = sd_bus_message_append(reply, "(ssssuu)",
 597                                           strempty(inhibit_what_to_string(inhibitor->what)),
 598                                           strempty(inhibitor->who),
 599                                           strempty(inhibitor->why),
 600                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 601                                           (uint32_t) inhibitor->uid,
 602                                           (uint32_t) inhibitor->pid);
 603                 if (r < 0)
 604                         return r;
 605         }
 606
 607         r = sd_bus_message_close_container(reply);
 608         if (r < 0)
 609                 return r;
 610
 611         return sd_bus_send(NULL, reply, NULL);
 612 }
 613
 614 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 615         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 616         uint32_t audit_id = 0;
 617         _cleanup_free_ char *id = NULL;
 618         Session *session = NULL;
 619         Manager *m = userdata;
 620         User *user = NULL;
 621         Seat *seat = NULL;
 622         pid_t leader;
 623         uid_t uid;
 624         int remote;
 625         uint32_t vtnr = 0;
 626         SessionType t;
 627         SessionClass c;
 628         int r;
 629
 630         assert(message);
 631         assert(m);
 632
 633         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 634         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 635
 636         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 637         if (r < 0)
 638                 return r;
 639
 640         if (!uid_is_valid(uid))
 641                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 642         if (leader < 0 || leader == 1)
 643                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 644
 645         if (isempty(type))
 646                 t = _SESSION_TYPE_INVALID;
 647         else {
 648                 t = session_type_from_string(type);
 649                 if (t < 0)
 650                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 651         }
 652
 653         if (isempty(class))
 654                 c = _SESSION_CLASS_INVALID;
 655         else {
 656                 c = session_class_from_string(class);
 657                 if (c < 0)
 658                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 659         }
 660
 661         if (isempty(desktop))
 662                 desktop = NULL;
 663         else {
 664                 if (!string_is_safe(desktop))
 665                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 666         }
 667
 668         if (isempty(cseat))
 669                 seat = NULL;
 670         else {
 671                 seat = hashmap_get(m->seats, cseat);
 672                 if (!seat)
 673                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 674         }
 675
 676         if (tty_is_vc(tty)) {
 677                 int v;
 678
 679                 if (!seat)
 680                         seat = m->seat0;
 681                 else if (seat != m->seat0)
 682                         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);
 683
 684                 v = vtnr_from_tty(tty);
 685                 if (v <= 0)
 686                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 687
 688                 if (!vtnr)
 689                         vtnr = (uint32_t) v;
 690                 else if (vtnr != (uint32_t) v)
 691                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 692
 693         } else if (tty_is_console(tty)) {
 694
 695                 if (!seat)
 696                         seat = m->seat0;
 697                 else if (seat != m->seat0)
 698                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 699
 700                 if (vtnr != 0)
 701                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 702         }
 703
 704         if (seat) {
 705                 if (seat_has_vts(seat)) {
 706                         if (!vtnr || vtnr > 63)
 707                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 708                 } else {
 709                         if (vtnr != 0)
 710                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 711                 }
 712         }
 713
 714         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 715         if (r < 0)
 716                 return r;
 717
 718         if (t == _SESSION_TYPE_INVALID) {
 719                 if (!isempty(display))
 720                         t = SESSION_X11;
 721                 else if (!isempty(tty))
 722                         t = SESSION_TTY;
 723                 else
 724                         t = SESSION_UNSPECIFIED;
 725         }
 726
 727         if (c == _SESSION_CLASS_INVALID) {
 728                 if (t == SESSION_UNSPECIFIED)
 729                         c = SESSION_BACKGROUND;
 730                 else
 731                         c = SESSION_USER;
 732         }
 733
 734         if (leader == 0) {
 735                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 736
 737                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 738                 if (r < 0)
 739                         return r;
 740
 741                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 742                 if (r < 0)
 743                         return r;
 744         }
 745
 746         r = manager_get_session_by_pid(m, leader, NULL);
 747         if (r > 0)
 748                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session");
 749
 750         /*
 751          * Old gdm and lightdm start the user-session on the same VT as
 752          * the greeter session. But they destroy the greeter session
 753          * after the user-session and want the user-session to take
 754          * over the VT. We need to support this for
 755          * backwards-compatibility, so make sure we allow new sessions
 756          * on a VT that a greeter is running on. Furthermore, to allow
 757          * re-logins, we have to allow a greeter to take over a used VT for
 758          * the exact same reasons.
 759          */
 760         if (c != SESSION_GREETER &&
 761             vtnr > 0 &&
 762             vtnr < m->seat0->position_count &&
 763             m->seat0->positions[vtnr] &&
 764             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 765                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 766
 767         if (hashmap_size(m->sessions) >= m->sessions_max)
 768                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 769
 770         audit_session_from_pid(leader, &audit_id);
 771         if (audit_id > 0) {
 772                 /* Keep our session IDs and the audit session IDs in sync */
 773
 774                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 775                         return -ENOMEM;
 776
 777                 /* Wut? There's already a session by this name and we
 778                  * didn't find it above? Weird, then let's not trust
 779                  * the audit data and let's better register a new
 780                  * ID */
 781                 if (hashmap_get(m->sessions, id)) {
 782                         log_warning("Existing logind session ID %s used by new audit session, ignoring", id);
 783                         audit_id = 0;
 784
 785                         id = mfree(id);
 786                 }
 787         }
 788
 789         if (!id) {
 790                 do {
 791                         id = mfree(id);
 792
 793                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 794                                 return -ENOMEM;
 795
 796                 } while (hashmap_get(m->sessions, id));
 797         }
 798
 799         r = manager_add_user_by_uid(m, uid, &user);
 800         if (r < 0)
 801                 goto fail;
 802
 803         r = manager_add_session(m, id, &session);
 804         if (r < 0)
 805                 goto fail;
 806
 807         session_set_user(session, user);
 808
 809         session->leader = leader;
 810         session->audit_id = audit_id;
 811         session->type = t;
 812         session->class = c;
 813         session->remote = remote;
 814         session->vtnr = vtnr;
 815
 816         if (!isempty(tty)) {
 817                 session->tty = strdup(tty);
 818                 if (!session->tty) {
 819                         r = -ENOMEM;
 820                         goto fail;
 821                 }
 822         }
 823
 824         if (!isempty(display)) {
 825                 session->display = strdup(display);
 826                 if (!session->display) {
 827                         r = -ENOMEM;
 828                         goto fail;
 829                 }
 830         }
 831
 832         if (!isempty(remote_user)) {
 833                 session->remote_user = strdup(remote_user);
 834                 if (!session->remote_user) {
 835                         r = -ENOMEM;
 836                         goto fail;
 837                 }
 838         }
 839
 840         if (!isempty(remote_host)) {
 841                 session->remote_host = strdup(remote_host);
 842                 if (!session->remote_host) {
 843                         r = -ENOMEM;
 844                         goto fail;
 845                 }
 846         }
 847
 848         if (!isempty(service)) {
 849                 session->service = strdup(service);
 850                 if (!session->service) {
 851                         r = -ENOMEM;
 852                         goto fail;
 853                 }
 854         }
 855
 856         if (!isempty(desktop)) {
 857                 session->desktop = strdup(desktop);
 858                 if (!session->desktop) {
 859                         r = -ENOMEM;
 860                         goto fail;
 861                 }
 862         }
 863
 864         if (seat) {
 865                 r = seat_attach_session(seat, session);
 866                 if (r < 0)
 867                         goto fail;
 868         }
 869
 870         r = session_start(session);
 871         if (r < 0)
 872                 goto fail;
 873
 874         session->create_message = sd_bus_message_ref(message);
 875
 876 #if 0 /// UNNEEDED by elogind
 877         /* Now, let's wait until the slice unit and stuff got
 878          * created. We send the reply back from
 879          * session_send_create_reply(). */
 880 #else
 881         /* We reply directly. */
 882
 883         r = session_send_create_reply(session, NULL);
 884         if (r < 0)
 885                 goto fail;
 886 #endif // 0
 887
 888         return 1;
 889
 890 fail:
 891         if (session)
 892                 session_add_to_gc_queue(session);
 893
 894         if (user)
 895                 user_add_to_gc_queue(user);
 896
 897         return r;
 898 }
 899
 900 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 901         Manager *m = userdata;
 902         Session *session;
 903         const char *name;
 904         int r;
 905
 906         assert(message);
 907         assert(m);
 908
 909         r = sd_bus_message_read(message, "s", &name);
 910         if (r < 0)
 911                 return r;
 912
 913         r = manager_get_session_from_creds(m, message, name, error, &session);
 914         if (r < 0)
 915                 return r;
 916
 917         r = session_release(session);
 918         if (r < 0)
 919                 return r;
 920
 921         session_add_to_gc_queue(session);
 922
 923         return sd_bus_reply_method_return(message, NULL);
 924 }
 925
 926 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 927         Manager *m = userdata;
 928         Session *session;
 929         const char *name;
 930         int r;
 931
 932         assert(message);
 933         assert(m);
 934
 935         r = sd_bus_message_read(message, "s", &name);
 936         if (r < 0)
 937                 return r;
 938
 939         r = manager_get_session_from_creds(m, message, name, error, &session);
 940         if (r < 0)
 941                 return r;
 942
 943         return bus_session_method_activate(message, session, error);
 944 }
 945
 946 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 947         const char *session_name, *seat_name;
 948         Manager *m = userdata;
 949         Session *session;
 950         Seat *seat;
 951         int r;
 952
 953         assert(message);
 954         assert(m);
 955
 956         /* Same as ActivateSession() but refuses to work if
 957          * the seat doesn't match */
 958
 959         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 960         if (r < 0)
 961                 return r;
 962
 963         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 964         if (r < 0)
 965                 return r;
 966
 967         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 968         if (r < 0)
 969                 return r;
 970
 971         if (session->seat != seat)
 972                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 973
 974         r = session_activate(session);
 975         if (r < 0)
 976                 return r;
 977
 978         return sd_bus_reply_method_return(message, NULL);
 979 }
 980
 981 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 982         Manager *m = userdata;
 983         Session *session;
 984         const char *name;
 985         int r;
 986
 987         assert(message);
 988         assert(m);
 989
 990         r = sd_bus_message_read(message, "s", &name);
 991         if (r < 0)
 992                 return r;
 993
 994         r = manager_get_session_from_creds(m, message, name, error, &session);
 995         if (r < 0)
 996                 return r;
 997
 998         return bus_session_method_lock(message, session, error);
 999 }
1000
1001 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1002         Manager *m = userdata;
1003         int r;
1004
1005         assert(message);
1006         assert(m);
1007
1008         r = bus_verify_polkit_async(
1009                         message,
1010                         CAP_SYS_ADMIN,
1011                         "org.freedesktop.login1.lock-sessions",
1012                         NULL,
1013                         false,
1014                         UID_INVALID,
1015                         &m->polkit_registry,
1016                         error);
1017         if (r < 0)
1018                 return r;
1019         if (r == 0)
1020                 return 1; /* Will call us back */
1021
1022         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1023         if (r < 0)
1024                 return r;
1025
1026         return sd_bus_reply_method_return(message, NULL);
1027 }
1028
1029 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1030         const char *name;
1031         Manager *m = userdata;
1032         Session *session;
1033         int r;
1034
1035         assert(message);
1036         assert(m);
1037
1038         r = sd_bus_message_read(message, "s", &name);
1039         if (r < 0)
1040                 return r;
1041
1042         r = manager_get_session_from_creds(m, message, name, error, &session);
1043         if (r < 0)
1044                 return r;
1045
1046         return bus_session_method_kill(message, session, error);
1047 }
1048
1049 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1050         Manager *m = userdata;
1051         uint32_t uid;
1052         User *user;
1053         int r;
1054
1055         assert(message);
1056         assert(m);
1057
1058         r = sd_bus_message_read(message, "u", &uid);
1059         if (r < 0)
1060                 return r;
1061
1062         r = manager_get_user_from_creds(m, message, uid, error, &user);
1063         if (r < 0)
1064                 return r;
1065
1066         return bus_user_method_kill(message, user, error);
1067 }
1068
1069 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1070         Manager *m = userdata;
1071         const char *name;
1072         Session *session;
1073         int r;
1074
1075         assert(message);
1076         assert(m);
1077
1078         r = sd_bus_message_read(message, "s", &name);
1079         if (r < 0)
1080                 return r;
1081
1082         r = manager_get_session_from_creds(m, message, name, error, &session);
1083         if (r < 0)
1084                 return r;
1085
1086         return bus_session_method_terminate(message, session, error);
1087 }
1088
1089 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1090         Manager *m = userdata;
1091         uint32_t uid;
1092         User *user;
1093         int r;
1094
1095         assert(message);
1096         assert(m);
1097
1098         r = sd_bus_message_read(message, "u", &uid);
1099         if (r < 0)
1100                 return r;
1101
1102         r = manager_get_user_from_creds(m, message, uid, error, &user);
1103         if (r < 0)
1104                 return r;
1105
1106         return bus_user_method_terminate(message, user, error);
1107 }
1108
1109 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1110         Manager *m = userdata;
1111         const char *name;
1112         Seat *seat;
1113         int r;
1114
1115         assert(message);
1116         assert(m);
1117
1118         r = sd_bus_message_read(message, "s", &name);
1119         if (r < 0)
1120                 return r;
1121
1122         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1123         if (r < 0)
1124                 return r;
1125
1126         return bus_seat_method_terminate(message, seat, error);
1127 }
1128
1129 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1130         _cleanup_free_ char *cc = NULL;
1131         Manager *m = userdata;
1132         int r, b, interactive;
1133         struct passwd *pw;
1134         const char *path;
1135         uint32_t uid;
1136         bool self = false;
1137
1138         assert(message);
1139         assert(m);
1140
1141         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1142         if (r < 0)
1143                 return r;
1144
1145         if (uid == UID_INVALID) {
1146                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1147
1148                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1149                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1150                 if (r < 0)
1151                         return r;
1152
1153                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1154                 if (r < 0)
1155                         return r;
1156
1157                 self = true;
1158
1159         } else if (!uid_is_valid(uid))
1160                 return -EINVAL;
1161
1162         errno = 0;
1163         pw = getpwuid(uid);
1164         if (!pw)
1165                 return errno > 0 ? -errno : -ENOENT;
1166
1167         r = bus_verify_polkit_async(
1168                         message,
1169                         CAP_SYS_ADMIN,
1170                         self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger",
1171                         NULL,
1172                         interactive,
1173                         UID_INVALID,
1174                         &m->polkit_registry,
1175                         error);
1176         if (r < 0)
1177                 return r;
1178         if (r == 0)
1179                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1180
1181         mkdir_p_label("/var/lib/systemd", 0755);
1182
1183         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1184         if (r < 0)
1185                 return r;
1186
1187         cc = cescape(pw->pw_name);
1188         if (!cc)
1189                 return -ENOMEM;
1190
1191         path = strjoina("/var/lib/systemd/linger/", cc);
1192         if (b) {
1193                 User *u;
1194
1195                 r = touch(path);
1196                 if (r < 0)
1197                         return r;
1198
1199                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1200                         user_start(u);
1201
1202         } else {
1203                 User *u;
1204
1205                 r = unlink(path);
1206                 if (r < 0 && errno != ENOENT)
1207                         return -errno;
1208
1209                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1210                 if (u)
1211                         user_add_to_gc_queue(u);
1212         }
1213
1214         return sd_bus_reply_method_return(message, NULL);
1215 }
1216
1217 static int trigger_device(Manager *m, struct udev_device *d) {
1218         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1219         struct udev_list_entry *first, *item;
1220         int r;
1221
1222         assert(m);
1223
1224         e = udev_enumerate_new(m->udev);
1225         if (!e)
1226                 return -ENOMEM;
1227
1228         if (d) {
1229                 r = udev_enumerate_add_match_parent(e, d);
1230                 if (r < 0)
1231                         return r;
1232         }
1233
1234         r = udev_enumerate_scan_devices(e);
1235         if (r < 0)
1236                 return r;
1237
1238         first = udev_enumerate_get_list_entry(e);
1239         udev_list_entry_foreach(item, first) {
1240                 _cleanup_free_ char *t = NULL;
1241                 const char *p;
1242
1243                 p = udev_list_entry_get_name(item);
1244
1245                 t = strappend(p, "/uevent");
1246                 if (!t)
1247                         return -ENOMEM;
1248
1249                 write_string_file(t, "change", WRITE_STRING_FILE_CREATE);
1250         }
1251
1252         return 0;
1253 }
1254
1255 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1256         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1257         _cleanup_free_ char *rule = NULL, *file = NULL;
1258         const char *id_for_seat;
1259         int r;
1260
1261         assert(m);
1262         assert(seat);
1263         assert(sysfs);
1264
1265         d = udev_device_new_from_syspath(m->udev, sysfs);
1266         if (!d)
1267                 return -ENODEV;
1268
1269         if (!udev_device_has_tag(d, "seat"))
1270                 return -ENODEV;
1271
1272         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1273         if (!id_for_seat)
1274                 return -ENODEV;
1275
1276         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1277                 return -ENOMEM;
1278
1279         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1280                 return -ENOMEM;
1281
1282         mkdir_p_label("/etc/udev/rules.d", 0755);
1283         r = write_string_file_atomic_label(file, rule);
1284         if (r < 0)
1285                 return r;
1286
1287         return trigger_device(m, d);
1288 }
1289
1290 static int flush_devices(Manager *m) {
1291         _cleanup_closedir_ DIR *d;
1292
1293         assert(m);
1294
1295         d = opendir("/etc/udev/rules.d");
1296         if (!d) {
1297                 if (errno != ENOENT)
1298                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1299         } else {
1300                 struct dirent *de;
1301
1302                 while ((de = readdir(d))) {
1303
1304                         if (!dirent_is_file(de))
1305                                 continue;
1306
1307                         if (!startswith(de->d_name, "72-seat-"))
1308                                 continue;
1309
1310                         if (!endswith(de->d_name, ".rules"))
1311                                 continue;
1312
1313                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1314                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1315                 }
1316         }
1317
1318         return trigger_device(m, NULL);
1319 }
1320
1321 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1322         const char *sysfs, *seat;
1323         Manager *m = userdata;
1324         int interactive, r;
1325
1326         assert(message);
1327         assert(m);
1328
1329         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1330         if (r < 0)
1331                 return r;
1332
1333         if (!path_startswith(sysfs, "/sys"))
1334                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1335
1336         if (!seat_name_is_valid(seat))
1337                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1338
1339         r = bus_verify_polkit_async(
1340                         message,
1341                         CAP_SYS_ADMIN,
1342                         "org.freedesktop.login1.attach-device",
1343                         NULL,
1344                         interactive,
1345                         UID_INVALID,
1346                         &m->polkit_registry,
1347                         error);
1348         if (r < 0)
1349                 return r;
1350         if (r == 0)
1351                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1352
1353         r = attach_device(m, seat, sysfs);
1354         if (r < 0)
1355                 return r;
1356
1357         return sd_bus_reply_method_return(message, NULL);
1358 }
1359
1360 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1361         Manager *m = userdata;
1362         int interactive, r;
1363
1364         assert(message);
1365         assert(m);
1366
1367         r = sd_bus_message_read(message, "b", &interactive);
1368         if (r < 0)
1369                 return r;
1370
1371         r = bus_verify_polkit_async(
1372                         message,
1373                         CAP_SYS_ADMIN,
1374                         "org.freedesktop.login1.flush-devices",
1375                         NULL,
1376                         interactive,
1377                         UID_INVALID,
1378                         &m->polkit_registry,
1379                         error);
1380         if (r < 0)
1381                 return r;
1382         if (r == 0)
1383                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1384
1385         r = flush_devices(m);
1386         if (r < 0)
1387                 return r;
1388
1389         return sd_bus_reply_method_return(message, NULL);
1390 }
1391
1392 static int have_multiple_sessions(
1393                 Manager *m,
1394                 uid_t uid) {
1395
1396         Session *session;
1397         Iterator i;
1398
1399         assert(m);
1400
1401         /* Check for other users' sessions. Greeter sessions do not
1402          * count, and non-login sessions do not count either. */
1403         HASHMAP_FOREACH(session, m->sessions, i)
1404                 if (session->class == SESSION_USER &&
1405                     session->user->uid != uid)
1406                         return true;
1407
1408         return false;
1409 }
1410
1411 static int bus_manager_log_shutdown(
1412                 Manager *m,
1413                 InhibitWhat w,
1414 #if 0 /// elogind does not support systemd units
1415                 const char *unit_name) {
1416
1417         const char *p, *q;
1418
1419         assert(m);
1420         assert(unit_name);
1421
1422         if (w != INHIBIT_SHUTDOWN)
1423                 return 0;
1424
1425         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1426                 p = "MESSAGE=System is powering down";
1427                 q = "SHUTDOWN=power-off";
1428         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1429                 p = "MESSAGE=System is halting";
1430                 q = "SHUTDOWN=halt";
1431         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1432                 p = "MESSAGE=System is rebooting";
1433                 q = "SHUTDOWN=reboot";
1434         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1435                 p = "MESSAGE=System is rebooting with kexec";
1436                 q = "SHUTDOWN=kexec";
1437         } else {
1438                 p = "MESSAGE=System is shutting down";
1439                 q = NULL;
1440         }
1441 #else
1442                  HandleAction action) {
1443
1444          const char *p, *q;
1445
1446          assert(m);
1447
1448          if (w != INHIBIT_SHUTDOWN)
1449                  return 0;
1450
1451          switch (action) {
1452          case HANDLE_POWEROFF:
1453                  p = "MESSAGE=System is powering down.";
1454                  q = "SHUTDOWN=power-off";
1455                  break;
1456          case HANDLE_HALT:
1457                  p = "MESSAGE=System is halting.";
1458                  q = "SHUTDOWN=halt";
1459                  break;
1460          case HANDLE_REBOOT:
1461                  p = "MESSAGE=System is rebooting.";
1462                  q = "SHUTDOWN=reboot";
1463                  break;
1464          case HANDLE_KEXEC:
1465                  p = "MESSAGE=System is rebooting with kexec.";
1466                  q = "SHUTDOWN=kexec";
1467                  break;
1468          default:
1469                  p = "MESSAGE=System is shutting down.";
1470                  q = NULL;
1471          }
1472 #endif // 0
1473         if (isempty(m->wall_message))
1474                 p = strjoina(p, ".");
1475         else
1476                 p = strjoina(p, " (", m->wall_message, ").");
1477
1478         return log_struct(LOG_NOTICE,
1479                           LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
1480                           p,
1481                           q,
1482                           NULL);
1483 }
1484
1485 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1486         Manager *m = userdata;
1487
1488         assert(e);
1489         assert(m);
1490
1491         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1492         return 0;
1493 }
1494
1495 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1496         int r;
1497
1498         assert(m);
1499
1500         if (until <= now(CLOCK_MONOTONIC))
1501                 return 0;
1502
1503         /* We want to ignore the lid switch for a while after each
1504          * suspend, and after boot-up. Hence let's install a timer for
1505          * this. As long as the event source exists we ignore the lid
1506          * switch. */
1507
1508         if (m->lid_switch_ignore_event_source) {
1509                 usec_t u;
1510
1511                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1512                 if (r < 0)
1513                         return r;
1514
1515                 if (until <= u)
1516                         return 0;
1517
1518                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1519         } else
1520                 r = sd_event_add_time(
1521                                 m->event,
1522                                 &m->lid_switch_ignore_event_source,
1523                                 CLOCK_MONOTONIC,
1524                                 until, 0,
1525                                 lid_switch_ignore_handler, m);
1526
1527         return r;
1528 }
1529
1530 static void reset_scheduled_shutdown(Manager *m) {
1531         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1532         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1533         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1534         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1535         m->scheduled_shutdown_timeout = 0;
1536         m->shutdown_dry_run = false;
1537
1538         if (m->unlink_nologin) {
1539                 (void) unlink("/run/nologin");
1540                 m->unlink_nologin = false;
1541         }
1542 }
1543
1544 static int execute_shutdown_or_sleep(
1545                 Manager *m,
1546                 InhibitWhat w,
1547                 HandleAction action,
1548                 sd_bus_error *error) {
1549
1550 #if 0 /// elogind does not need these, we do it ourselves
1551         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1552         char *c = NULL;
1553         const char *p;
1554 #else
1555         /* needed for update-utmp */
1556         char** argv_utmp = NULL;
1557 #endif // 0
1558         int r;
1559
1560         assert(m);
1561         assert(w >= 0);
1562         assert(w < _INHIBIT_WHAT_MAX);
1563
1564         bus_manager_log_shutdown(m, w, action);
1565
1566 #if 0 /// elogind does it directly without depending on systemd running the system
1567         if (m->shutdown_dry_run) {
1568                 log_info("Running in dry run, suppressing action.");
1569                 reset_scheduled_shutdown(m);
1570         } else {
1571                 r = sd_bus_call_method(
1572                                 m->bus,
1573                                 "org.freedesktop.systemd1",
1574                                 "/org/freedesktop/systemd1",
1575                                 "org.freedesktop.systemd1.Manager",
1576                                 "StartUnit",
1577                                 error,
1578                                 &reply,
1579                                 "ss", unit_name, "replace-irreversibly");
1580                 if (r < 0)
1581                         return r;
1582
1583                 r = sd_bus_message_read(reply, "o", &p);
1584                 if (r < 0)
1585                         return r;
1586
1587                 c = strdup(p);
1588                 if (!c)
1589                         return -ENOMEM;
1590
1591                 m->action_unit = unit_name;
1592                 free(m->action_job);
1593                 m->action_job = c;
1594                 m->action_what = w;
1595         }
1596 #else
1597         if (IN_SET(action, HANDLE_HALT, HANDLE_POWEROFF, HANDLE_REBOOT)) {
1598
1599                 /* As we have no systemd update-utmp daemon running, we have to
1600                  * set the relevant utmp/wtmp entries ourselves.
1601                  */
1602
1603                 if (strv_extend(&argv_utmp, "elogind") < 0)
1604                         return log_oom();
1605
1606                 if (HANDLE_REBOOT == action) {
1607                         if (strv_extend(&argv_utmp, "reboot") < 0)
1608                                 return log_oom();
1609                 } else {
1610                         if (strv_extend(&argv_utmp, "shutdown") < 0)
1611                                 return log_oom();
1612                 }
1613
1614                  /* This comes from our patched update-utmp/update-utmp.c */
1615                 update_utmp(2, argv_utmp, m->bus);
1616                 strv_free(argv_utmp);
1617         }
1618
1619         /* Now perform the requested action */
1620         r = shutdown_or_sleep(m, action);
1621
1622         /* no more pending actions, whether this failed or not */
1623         m->pending_action = HANDLE_IGNORE;
1624         m->action_what    = 0;
1625         if (r < 0)
1626                 return r;
1627 #endif // 0
1628
1629         /* Make sure the lid switch is ignored for a while */
1630         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1631
1632         return 0;
1633 }
1634
1635 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1636
1637         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1638         Inhibitor *offending = NULL;
1639         int r;
1640
1641         assert(manager);
1642
1643         if ( (0 == manager->action_what) || (HANDLE_IGNORE == manager->pending_action) )
1644                 return 0;
1645
1646         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1647                 _cleanup_free_ char *comm = NULL, *u = NULL;
1648
1649                 if (!timeout)
1650                         return 0;
1651
1652                 (void) get_process_comm(offending->pid, &comm);
1653                 u = uid_to_name(offending->uid);
1654
1655                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1656                            offending->uid, strna(u),
1657                            offending->pid, strna(comm));
1658         }
1659
1660         /* Actually do the operation */
1661         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->pending_action, &error);
1662         if (r < 0) {
1663                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1664
1665                 manager->pending_action = HANDLE_IGNORE;
1666                 manager->action_what    = 0;
1667                 return r;
1668         }
1669
1670         return 1;
1671 }
1672
1673 static int manager_inhibit_timeout_handler(
1674                         sd_event_source *s,
1675                         uint64_t usec,
1676                         void *userdata) {
1677
1678         Manager *manager = userdata;
1679         int r;
1680
1681         assert(manager);
1682         assert(manager->inhibit_timeout_source == s);
1683
1684         r = manager_dispatch_delayed(manager, true);
1685         return (r < 0) ? r : 0;
1686 }
1687
1688 static int delay_shutdown_or_sleep(
1689                 Manager *m,
1690                 InhibitWhat w,
1691                 HandleAction action) {
1692
1693         int r;
1694         usec_t timeout_val;
1695
1696         assert(m);
1697         assert(w >= 0);
1698         assert(w < _INHIBIT_WHAT_MAX);
1699
1700         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1701
1702         if (m->inhibit_timeout_source) {
1703                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1704                 if (r < 0)
1705                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1706
1707                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1708                 if (r < 0)
1709                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1710         } else {
1711                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1712                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1713                 if (r < 0)
1714                         return r;
1715         }
1716
1717         m->pending_action = action;
1718         m->action_what = w;
1719
1720         return 0;
1721 }
1722
1723 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1724
1725         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1726                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1727                 [INHIBIT_SLEEP] = "PrepareForSleep"
1728         };
1729
1730         int active = _active;
1731
1732         assert(m);
1733         assert(w >= 0);
1734         assert(w < _INHIBIT_WHAT_MAX);
1735         assert(signal_name[w]);
1736
1737         return sd_bus_emit_signal(m->bus,
1738                                   "/org/freedesktop/login1",
1739                                   "org.freedesktop.login1.Manager",
1740                                   signal_name[w],
1741                                   "b",
1742                                   active);
1743 }
1744
1745 int bus_manager_shutdown_or_sleep_now_or_later(
1746                 Manager *m,
1747                 HandleAction action,
1748                 InhibitWhat w,
1749                 sd_bus_error *error) {
1750
1751         bool delayed;
1752         int r;
1753
1754         assert(m);
1755         assert(w >= 0);
1756         assert(w <= _INHIBIT_WHAT_MAX);
1757
1758         /* Tell everybody to prepare for shutdown/sleep */
1759         send_prepare_for(m, w, true);
1760
1761         delayed =
1762                 m->inhibit_delay_max > 0 &&
1763                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1764
1765         if (delayed)
1766                 /* Shutdown is delayed, keep in mind what we
1767                  * want to do, and start a timeout */
1768                 r = delay_shutdown_or_sleep(m, w, action);
1769         else
1770                 /* Shutdown is not delayed, execute it
1771                  * immediately */
1772                 r = execute_shutdown_or_sleep(m, w, action, error);
1773
1774         return r;
1775 }
1776
1777 static int verify_shutdown_creds(
1778                 Manager *m,
1779                 sd_bus_message *message,
1780                 InhibitWhat w,
1781                 bool interactive,
1782                 const char *action,
1783                 const char *action_multiple_sessions,
1784                 const char *action_ignore_inhibit,
1785                 sd_bus_error *error) {
1786
1787         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1788         bool multiple_sessions, blocked;
1789         uid_t uid;
1790         int r;
1791
1792         assert(m);
1793         assert(message);
1794         assert(w >= 0);
1795         assert(w <= _INHIBIT_WHAT_MAX);
1796
1797         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1798         if (r < 0)
1799                 return r;
1800
1801         r = sd_bus_creds_get_euid(creds, &uid);
1802         if (r < 0)
1803                 return r;
1804
1805         r = have_multiple_sessions(m, uid);
1806         if (r < 0)
1807                 return r;
1808
1809         multiple_sessions = r > 0;
1810         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1811
1812         if (multiple_sessions && action_multiple_sessions) {
1813                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1814                 if (r < 0)
1815                         return r;
1816                 if (r == 0)
1817                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1818         }
1819
1820         if (blocked && action_ignore_inhibit) {
1821                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1822                 if (r < 0)
1823                         return r;
1824                 if (r == 0)
1825                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1826         }
1827
1828         if (!multiple_sessions && !blocked && action) {
1829                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1830                 if (r < 0)
1831                         return r;
1832                 if (r == 0)
1833                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1834         }
1835
1836         return 0;
1837 }
1838
1839 static int method_do_shutdown_or_sleep(
1840                 Manager *m,
1841                 sd_bus_message *message,
1842                 HandleAction sleep_action,
1843                 InhibitWhat w,
1844                 const char *action,
1845                 const char *action_multiple_sessions,
1846                 const char *action_ignore_inhibit,
1847                 const char *sleep_verb,
1848                 sd_bus_error *error) {
1849
1850         int interactive, r;
1851
1852         assert(m);
1853         assert(message);
1854         assert(w >= 0);
1855         assert(w <= _INHIBIT_WHAT_MAX);
1856
1857         r = sd_bus_message_read(message, "b", &interactive);
1858         if (r < 0)
1859                 return r;
1860
1861         /* Don't allow multiple jobs being executed at the same time */
1862         if (m->action_what)
1863                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1864
1865         if (sleep_verb) {
1866                 r = can_sleep(m, sleep_verb);
1867                 if (r < 0)
1868                         return r;
1869
1870                 if (r == 0)
1871                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1872         }
1873
1874         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1875                                   action_ignore_inhibit, error);
1876         if (r != 0)
1877                 return r;
1878
1879         r = bus_manager_shutdown_or_sleep_now_or_later(m, sleep_action, w, error);
1880         if (r < 0)
1881                 return r;
1882
1883         return sd_bus_reply_method_return(message, NULL);
1884 }
1885
1886 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1887         Manager *m = userdata;
1888
1889         return method_do_shutdown_or_sleep(
1890                         m, message,
1891                         HANDLE_POWEROFF,
1892                         INHIBIT_SHUTDOWN,
1893                         "org.freedesktop.login1.power-off",
1894                         "org.freedesktop.login1.power-off-multiple-sessions",
1895                         "org.freedesktop.login1.power-off-ignore-inhibit",
1896                         NULL,
1897                         error);
1898 }
1899
1900 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1901         Manager *m = userdata;
1902
1903         return method_do_shutdown_or_sleep(
1904                         m, message,
1905                         HANDLE_REBOOT,
1906                         INHIBIT_SHUTDOWN,
1907                         "org.freedesktop.login1.reboot",
1908                         "org.freedesktop.login1.reboot-multiple-sessions",
1909                         "org.freedesktop.login1.reboot-ignore-inhibit",
1910                         NULL,
1911                         error);
1912 }
1913
1914 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1915         Manager *m = userdata;
1916
1917         return method_do_shutdown_or_sleep(
1918                         m, message,
1919                         HANDLE_SUSPEND,
1920                         INHIBIT_SLEEP,
1921                         "org.freedesktop.login1.suspend",
1922                         "org.freedesktop.login1.suspend-multiple-sessions",
1923                         "org.freedesktop.login1.suspend-ignore-inhibit",
1924                         "suspend",
1925                         error);
1926 }
1927
1928 static int nologin_timeout_handler(
1929                         sd_event_source *s,
1930                         uint64_t usec,
1931                         void *userdata) {
1932
1933         Manager *m = userdata;
1934         int r;
1935
1936         log_info("Creating /run/nologin, blocking further logins...");
1937
1938         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1939         if (r < 0)
1940                 log_error_errno(r, "Failed to create /run/nologin: %m");
1941         else
1942                 m->unlink_nologin = true;
1943
1944         return 0;
1945 }
1946
1947 static int update_schedule_file(Manager *m) {
1948         _cleanup_free_ char *temp_path = NULL;
1949         _cleanup_fclose_ FILE *f = NULL;
1950         int r;
1951
1952         assert(m);
1953
1954         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1955         if (r < 0)
1956                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1957
1958         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1959         if (r < 0)
1960                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1961
1962         (void) fchmod(fileno(f), 0644);
1963
1964         fprintf(f,
1965                 "USEC="USEC_FMT"\n"
1966                 "WARN_WALL=%i\n"
1967                 "MODE=%s\n",
1968                 m->scheduled_shutdown_timeout,
1969                 m->enable_wall_messages,
1970                 m->scheduled_shutdown_type);
1971
1972         if (!isempty(m->wall_message)) {
1973                 _cleanup_free_ char *t;
1974
1975                 t = cescape(m->wall_message);
1976                 if (!t) {
1977                         r = -ENOMEM;
1978                         goto fail;
1979                 }
1980
1981                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1982         }
1983
1984         r = fflush_and_check(f);
1985         if (r < 0)
1986                 goto fail;
1987
1988         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1989                 r = -errno;
1990                 goto fail;
1991         }
1992
1993         return 0;
1994
1995 fail:
1996         (void) unlink(temp_path);
1997         (void) unlink("/run/systemd/shutdown/scheduled");
1998
1999         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2000 }
2001
2002 static int manager_scheduled_shutdown_handler(
2003                         sd_event_source *s,
2004                         uint64_t usec,
2005                         void *userdata) {
2006
2007         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2008         Manager *m = userdata;
2009         HandleAction action;
2010         int r;
2011
2012         assert(m);
2013
2014         if (isempty(m->scheduled_shutdown_type))
2015                 return 0;
2016
2017         if (streq(m->scheduled_shutdown_type, "halt"))
2018                 action = HANDLE_HALT;
2019         else if (streq(m->scheduled_shutdown_type, "poweroff"))
2020                 action = HANDLE_POWEROFF;
2021         else
2022                 action = HANDLE_REBOOT;
2023
2024         r = execute_shutdown_or_sleep(m, 0, action, &error);
2025         if (r < 0)
2026                 return log_error_errno(r, "Unable to execute transition to %s: %m", m->scheduled_shutdown_type);
2027
2028         return 0;
2029 }
2030
2031 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2032         Manager *m = userdata;
2033         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2034         const char *action_multiple_sessions = NULL;
2035         const char *action_ignore_inhibit = NULL;
2036         const char *action = NULL;
2037         uint64_t elapse;
2038         char *type;
2039         int r;
2040
2041         assert(m);
2042         assert(message);
2043
2044         r = sd_bus_message_read(message, "st", &type, &elapse);
2045         if (r < 0)
2046                 return r;
2047
2048         if (startswith(type, "dry-")) {
2049                 type += 4;
2050                 m->shutdown_dry_run = true;
2051         }
2052
2053         if (streq(type, "reboot")) {
2054                 action = "org.freedesktop.login1.reboot";
2055                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2056                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2057         } else if (streq(type, "halt")) {
2058                 action = "org.freedesktop.login1.halt";
2059                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2060                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2061         } else if (streq(type, "poweroff")) {
2062                 action = "org.freedesktop.login1.power-off";
2063                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2064                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2065         } else
2066                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2067
2068         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2069                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2070         if (r != 0)
2071                 return r;
2072
2073         if (m->scheduled_shutdown_timeout_source) {
2074                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2075                 if (r < 0)
2076                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2077
2078                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2079                 if (r < 0)
2080                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2081         } else {
2082                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2083                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2084                 if (r < 0)
2085                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2086         }
2087
2088         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2089         if (r < 0) {
2090                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2091                 return log_oom();
2092         }
2093
2094         if (m->nologin_timeout_source) {
2095                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2096                 if (r < 0)
2097                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2098
2099                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2100                 if (r < 0)
2101                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2102         } else {
2103                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2104                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2105                 if (r < 0)
2106                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2107         }
2108
2109         m->scheduled_shutdown_timeout = elapse;
2110
2111         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2112         if (r >= 0) {
2113                 const char *tty = NULL;
2114
2115                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2116                 (void) sd_bus_creds_get_tty(creds, &tty);
2117
2118                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2119                 if (r < 0) {
2120                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2121                         return log_oom();
2122                 }
2123         }
2124
2125         r = manager_setup_wall_message_timer(m);
2126         if (r < 0)
2127                 return r;
2128
2129         if (!isempty(type)) {
2130                 r = update_schedule_file(m);
2131                 if (r < 0)
2132                         return r;
2133         } else
2134                 (void) unlink("/run/systemd/shutdown/scheduled");
2135
2136         return sd_bus_reply_method_return(message, NULL);
2137 }
2138
2139 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2140         Manager *m = userdata;
2141         bool cancelled;
2142
2143         assert(m);
2144         assert(message);
2145
2146         cancelled = m->scheduled_shutdown_type != NULL;
2147         reset_scheduled_shutdown(m);
2148
2149         if (cancelled) {
2150                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2151                 const char *tty = NULL;
2152                 uid_t uid = 0;
2153                 int r;
2154
2155                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2156                 if (r >= 0) {
2157                         (void) sd_bus_creds_get_uid(creds, &uid);
2158                         (void) sd_bus_creds_get_tty(creds, &tty);
2159                 }
2160
2161                 utmp_wall("The system shutdown has been cancelled",
2162                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2163         }
2164
2165         return sd_bus_reply_method_return(message, "b", cancelled);
2166 }
2167
2168 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2169         Manager *m = userdata;
2170
2171         return method_do_shutdown_or_sleep(
2172                         m, message,
2173                         HANDLE_HIBERNATE,
2174                         INHIBIT_SLEEP,
2175                         "org.freedesktop.login1.hibernate",
2176                         "org.freedesktop.login1.hibernate-multiple-sessions",
2177                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2178                         "hibernate",
2179                         error);
2180 }
2181
2182 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2183         Manager *m = userdata;
2184
2185         return method_do_shutdown_or_sleep(
2186                         m, message,
2187                         HANDLE_HYBRID_SLEEP,
2188                         INHIBIT_SLEEP,
2189                         "org.freedesktop.login1.hibernate",
2190                         "org.freedesktop.login1.hibernate-multiple-sessions",
2191                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2192                         "hybrid-sleep",
2193                         error);
2194 }
2195
2196 static int method_can_shutdown_or_sleep(
2197                 Manager *m,
2198                 sd_bus_message *message,
2199                 InhibitWhat w,
2200                 const char *action,
2201                 const char *action_multiple_sessions,
2202                 const char *action_ignore_inhibit,
2203                 const char *sleep_verb,
2204                 sd_bus_error *error) {
2205
2206         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2207         bool multiple_sessions, challenge, blocked;
2208         const char *result = NULL;
2209         uid_t uid;
2210         int r;
2211
2212         assert(m);
2213         assert(message);
2214         assert(w >= 0);
2215         assert(w <= _INHIBIT_WHAT_MAX);
2216         assert(action);
2217         assert(action_multiple_sessions);
2218         assert(action_ignore_inhibit);
2219
2220         if (sleep_verb) {
2221                 r = can_sleep(m, sleep_verb);
2222                 if (r < 0)
2223                         return r;
2224                 if (r == 0)
2225                         return sd_bus_reply_method_return(message, "s", "na");
2226         }
2227
2228         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2229         if (r < 0)
2230                 return r;
2231
2232         r = sd_bus_creds_get_euid(creds, &uid);
2233         if (r < 0)
2234                 return r;
2235
2236         r = have_multiple_sessions(m, uid);
2237         if (r < 0)
2238                 return r;
2239
2240         multiple_sessions = r > 0;
2241         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2242
2243         if (multiple_sessions) {
2244                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2245                 if (r < 0)
2246                         return r;
2247
2248                 if (r > 0)
2249                         result = "yes";
2250                 else if (challenge)
2251                         result = "challenge";
2252                 else
2253                         result = "no";
2254         }
2255
2256         if (blocked) {
2257                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2258                 if (r < 0)
2259                         return r;
2260
2261                 if (r > 0 && !result)
2262                         result = "yes";
2263                 else if (challenge && (!result || streq(result, "yes")))
2264                         result = "challenge";
2265                 else
2266                         result = "no";
2267         }
2268
2269         if (!multiple_sessions && !blocked) {
2270                 /* If neither inhibit nor multiple sessions
2271                  * apply then just check the normal policy */
2272
2273                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2274                 if (r < 0)
2275                         return r;
2276
2277                 if (r > 0)
2278                         result = "yes";
2279                 else if (challenge)
2280                         result = "challenge";
2281                 else
2282                         result = "no";
2283         }
2284
2285         return sd_bus_reply_method_return(message, "s", result);
2286 }
2287
2288 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2289         Manager *m = userdata;
2290
2291         return method_can_shutdown_or_sleep(
2292                         m, message,
2293                         INHIBIT_SHUTDOWN,
2294                         "org.freedesktop.login1.power-off",
2295                         "org.freedesktop.login1.power-off-multiple-sessions",
2296                         "org.freedesktop.login1.power-off-ignore-inhibit",
2297                         NULL,
2298                         error);
2299 }
2300
2301 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2302         Manager *m = userdata;
2303
2304         return method_can_shutdown_or_sleep(
2305                         m, message,
2306                         INHIBIT_SHUTDOWN,
2307                         "org.freedesktop.login1.reboot",
2308                         "org.freedesktop.login1.reboot-multiple-sessions",
2309                         "org.freedesktop.login1.reboot-ignore-inhibit",
2310                         NULL,
2311                         error);
2312 }
2313
2314 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2315         Manager *m = userdata;
2316
2317         return method_can_shutdown_or_sleep(
2318                         m, message,
2319                         INHIBIT_SLEEP,
2320                         "org.freedesktop.login1.suspend",
2321                         "org.freedesktop.login1.suspend-multiple-sessions",
2322                         "org.freedesktop.login1.suspend-ignore-inhibit",
2323                         "suspend",
2324                         error);
2325 }
2326
2327 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2328         Manager *m = userdata;
2329
2330         return method_can_shutdown_or_sleep(
2331                         m, message,
2332                         INHIBIT_SLEEP,
2333                         "org.freedesktop.login1.hibernate",
2334                         "org.freedesktop.login1.hibernate-multiple-sessions",
2335                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2336                         "hibernate",
2337                         error);
2338 }
2339
2340 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2341         Manager *m = userdata;
2342
2343         return method_can_shutdown_or_sleep(
2344                         m, message,
2345                         INHIBIT_SLEEP,
2346                         "org.freedesktop.login1.hibernate",
2347                         "org.freedesktop.login1.hibernate-multiple-sessions",
2348                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2349                         "hybrid-sleep",
2350                         error);
2351 }
2352
2353 static int property_get_reboot_to_firmware_setup(
2354                 sd_bus *bus,
2355                 const char *path,
2356                 const char *interface,
2357                 const char *property,
2358                 sd_bus_message *reply,
2359                 void *userdata,
2360                 sd_bus_error *error) {
2361 #if 0 /// elogind does not support EFI
2362         int r;
2363
2364         assert(bus);
2365         assert(reply);
2366         assert(userdata);
2367
2368         r = efi_get_reboot_to_firmware();
2369         if (r < 0 && r != -EOPNOTSUPP)
2370                 return r;
2371
2372         return sd_bus_message_append(reply, "b", r > 0);
2373 #else
2374         return sd_bus_message_append(reply, "b", false);
2375 #endif // 0
2376 }
2377
2378 static int method_set_reboot_to_firmware_setup(
2379                 sd_bus_message *message,
2380                 void *userdata,
2381                 sd_bus_error *error) {
2382
2383         int b, r;
2384         Manager *m = userdata;
2385
2386         assert(message);
2387         assert(m);
2388
2389         r = sd_bus_message_read(message, "b", &b);
2390         if (r < 0)
2391                 return r;
2392
2393         r = bus_verify_polkit_async(message,
2394                                     CAP_SYS_ADMIN,
2395                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2396                                     NULL,
2397                                     false,
2398                                     UID_INVALID,
2399                                     &m->polkit_registry,
2400                                     error);
2401         if (r < 0)
2402                 return r;
2403         if (r == 0)
2404                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2405
2406 #if 0 /// elogind does not support EFI
2407         r = efi_set_reboot_to_firmware(b);
2408         if (r < 0)
2409                 return r;
2410 #endif // 0
2411
2412         return sd_bus_reply_method_return(message, NULL);
2413 }
2414
2415 static int method_can_reboot_to_firmware_setup(
2416                 sd_bus_message *message,
2417                 void *userdata,
2418                 sd_bus_error *error) {
2419
2420 #if 0 /// elogind does not support EFI
2421         int r;
2422         bool challenge;
2423         const char *result;
2424         Manager *m = userdata;
2425
2426         assert(message);
2427         assert(m);
2428
2429         r = efi_reboot_to_firmware_supported();
2430         if (r == -EOPNOTSUPP)
2431                 return sd_bus_reply_method_return(message, "s", "na");
2432         else if (r < 0)
2433                 return r;
2434
2435         r = bus_test_polkit(message,
2436                             CAP_SYS_ADMIN,
2437                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2438                             NULL,
2439                             UID_INVALID,
2440                             &challenge,
2441                             error);
2442         if (r < 0)
2443                 return r;
2444
2445         if (r > 0)
2446                 result = "yes";
2447         else if (challenge)
2448                 result = "challenge";
2449         else
2450                 result = "no";
2451
2452         return sd_bus_reply_method_return(message, "s", result);
2453 #else
2454         return sd_bus_reply_method_return(message, "s", "no");
2455 #endif // 0
2456 }
2457
2458 static int method_set_wall_message(
2459                 sd_bus_message *message,
2460                 void *userdata,
2461                 sd_bus_error *error) {
2462
2463         int r;
2464         Manager *m = userdata;
2465         char *wall_message;
2466         int enable_wall_messages;
2467
2468         assert(message);
2469         assert(m);
2470
2471         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2472         if (r < 0)
2473                 return r;
2474
2475         r = bus_verify_polkit_async(message,
2476                                     CAP_SYS_ADMIN,
2477                                     "org.freedesktop.login1.set-wall-message",
2478                                     NULL,
2479                                     false,
2480                                     UID_INVALID,
2481                                     &m->polkit_registry,
2482                                     error);
2483         if (r < 0)
2484                 return r;
2485         if (r == 0)
2486                 return 1; /* Will call us back */
2487
2488         if (isempty(wall_message))
2489                 m->wall_message = mfree(m->wall_message);
2490         else {
2491                 r = free_and_strdup(&m->wall_message, wall_message);
2492                 if (r < 0)
2493                         return log_oom();
2494         }
2495
2496         m->enable_wall_messages = enable_wall_messages;
2497
2498         return sd_bus_reply_method_return(message, NULL);
2499 }
2500
2501 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2502         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2503         const char *who, *why, *what, *mode;
2504         _cleanup_free_ char *id = NULL;
2505         _cleanup_close_ int fifo_fd = -1;
2506         Manager *m = userdata;
2507         Inhibitor *i = NULL;
2508         InhibitMode mm;
2509         InhibitWhat w;
2510         pid_t pid;
2511         uid_t uid;
2512         int r;
2513
2514         assert(message);
2515         assert(m);
2516
2517         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2518         if (r < 0)
2519                 return r;
2520
2521         w = inhibit_what_from_string(what);
2522         if (w <= 0)
2523                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2524
2525         mm = inhibit_mode_from_string(mode);
2526         if (mm < 0)
2527                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2528
2529         /* Delay is only supported for shutdown/sleep */
2530         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2531                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2532
2533         /* Don't allow taking delay locks while we are already
2534          * executing the operation. We shouldn't create the impression
2535          * that the lock was successful if the machine is about to go
2536          * down/suspend any moment. */
2537         if (m->action_what & w)
2538                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2539
2540         r = bus_verify_polkit_async(
2541                         message,
2542                         CAP_SYS_BOOT,
2543                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2544                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2545                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2546                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2547                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2548                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2549                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2550                         NULL,
2551                         false,
2552                         UID_INVALID,
2553                         &m->polkit_registry,
2554                         error);
2555         if (r < 0)
2556                 return r;
2557         if (r == 0)
2558                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2559
2560         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2561         if (r < 0)
2562                 return r;
2563
2564         r = sd_bus_creds_get_euid(creds, &uid);
2565         if (r < 0)
2566                 return r;
2567
2568         r = sd_bus_creds_get_pid(creds, &pid);
2569         if (r < 0)
2570                 return r;
2571
2572         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2573                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2574
2575         do {
2576                 id = mfree(id);
2577
2578                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2579                         return -ENOMEM;
2580
2581         } while (hashmap_get(m->inhibitors, id));
2582
2583         r = manager_add_inhibitor(m, id, &i);
2584         if (r < 0)
2585                 return r;
2586
2587         i->what = w;
2588         i->mode = mm;
2589         i->pid = pid;
2590         i->uid = uid;
2591         i->why = strdup(why);
2592         i->who = strdup(who);
2593
2594         if (!i->why || !i->who) {
2595                 r = -ENOMEM;
2596                 goto fail;
2597         }
2598
2599         fifo_fd = inhibitor_create_fifo(i);
2600         if (fifo_fd < 0) {
2601                 r = fifo_fd;
2602                 goto fail;
2603         }
2604
2605         inhibitor_start(i);
2606
2607         return sd_bus_reply_method_return(message, "h", fifo_fd);
2608
2609 fail:
2610         if (i)
2611                 inhibitor_free(i);
2612
2613         return r;
2614 }
2615
2616 const sd_bus_vtable manager_vtable[] = {
2617         SD_BUS_VTABLE_START(0),
2618
2619         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2620         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2621
2622 //        SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2623         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2624         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2625         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2626         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2627         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2628         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2629         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2630         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2631         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2632         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2633         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2634         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2635         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2636         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2637         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2638         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2639         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2640         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2641         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2642         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2643         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2644         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2645         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2646         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2647         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2648         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2649         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2650         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2651         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2652
2653         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2654         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2655         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2656         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2657         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2658         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2659         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2660         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2661         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2662         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2663         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2664         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2665         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2666         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2667         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2668         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2669         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2670         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2671         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2672         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2673         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2674         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2675         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2676         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2677         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2678         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2679         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2680         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2681         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2682         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2683         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2684         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2685         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2689         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2690         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2691         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2692         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2693         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2694
2695         SD_BUS_SIGNAL("SessionNew", "so", 0),
2696         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2697         SD_BUS_SIGNAL("UserNew", "uo", 0),
2698         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2699         SD_BUS_SIGNAL("SeatNew", "so", 0),
2700         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2701         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2702         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2703
2704         SD_BUS_VTABLE_END
2705 };
2706
2707 #if 0 /// UNNEEDED by elogind
2708 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2709         int r = 0;
2710
2711         assert(s);
2712         assert(unit);
2713
2714         if (!s->started)
2715                 return r;
2716
2717         if (streq(result, "done"))
2718                 r = session_send_create_reply(s, NULL);
2719         else {
2720                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2721
2722                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2723                 r = session_send_create_reply(s, &e);
2724         }
2725
2726         return r;
2727 }
2728
2729 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2730         const char *path, *result, *unit;
2731         Manager *m = userdata;
2732         Session *session;
2733         uint32_t id;
2734         User *user;
2735         int r;
2736
2737         assert(message);
2738         assert(m);
2739
2740         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2741         if (r < 0) {
2742                 bus_log_parse_error(r);
2743                 return 0;
2744         }
2745
2746         if (m->action_job && streq(m->action_job, path)) {
2747                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2748
2749                 /* Tell people that they now may take a lock again */
2750                 send_prepare_for(m, m->action_what, false);
2751
2752                 m->action_job = mfree(m->action_job);
2753                 m->action_unit = NULL;
2754                 m->action_what = 0;
2755                 return 0;
2756         }
2757
2758         session = hashmap_get(m->session_units, unit);
2759         if (session && streq_ptr(path, session->scope_job)) {
2760                 session->scope_job = mfree(session->scope_job);
2761                 session_jobs_reply(session, unit, result);
2762
2763                 session_save(session);
2764                 user_save(session->user);
2765                 session_add_to_gc_queue(session);
2766         }
2767
2768         user = hashmap_get(m->user_units, unit);
2769         if (user &&
2770             (streq_ptr(path, user->service_job) ||
2771              streq_ptr(path, user->slice_job))) {
2772
2773                 if (streq_ptr(path, user->service_job))
2774                         user->service_job = mfree(user->service_job);
2775
2776                 if (streq_ptr(path, user->slice_job))
2777                         user->slice_job = mfree(user->slice_job);
2778
2779                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2780                         session_jobs_reply(session, unit, result);
2781
2782                 user_save(user);
2783                 user_add_to_gc_queue(user);
2784         }
2785
2786         return 0;
2787 }
2788
2789 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2790         const char *path, *unit;
2791         Manager *m = userdata;
2792         Session *session;
2793         User *user;
2794         int r;
2795
2796         assert(message);
2797         assert(m);
2798
2799         r = sd_bus_message_read(message, "so", &unit, &path);
2800         if (r < 0) {
2801                 bus_log_parse_error(r);
2802                 return 0;
2803         }
2804
2805         session = hashmap_get(m->session_units, unit);
2806         if (session)
2807                 session_add_to_gc_queue(session);
2808
2809         user = hashmap_get(m->user_units, unit);
2810         if (user)
2811                 user_add_to_gc_queue(user);
2812
2813         return 0;
2814 }
2815
2816 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2817         _cleanup_free_ char *unit = NULL;
2818         Manager *m = userdata;
2819         const char *path;
2820         Session *session;
2821         User *user;
2822         int r;
2823
2824         assert(message);
2825         assert(m);
2826
2827         path = sd_bus_message_get_path(message);
2828         if (!path)
2829                 return 0;
2830
2831         r = unit_name_from_dbus_path(path, &unit);
2832         if (r == -EINVAL) /* not a unit */
2833                 return 0;
2834         if (r < 0) {
2835                 log_oom();
2836                 return 0;
2837         }
2838
2839         session = hashmap_get(m->session_units, unit);
2840         if (session)
2841                 session_add_to_gc_queue(session);
2842
2843         user = hashmap_get(m->user_units, unit);
2844         if (user)
2845                 user_add_to_gc_queue(user);
2846
2847         return 0;
2848 }
2849
2850 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2851         Manager *m = userdata;
2852         Session *session;
2853         Iterator i;
2854         int b, r;
2855
2856         assert(message);
2857         assert(m);
2858
2859         r = sd_bus_message_read(message, "b", &b);
2860         if (r < 0) {
2861                 bus_log_parse_error(r);
2862                 return 0;
2863         }
2864
2865         if (b)
2866                 return 0;
2867
2868         /* systemd finished reloading, let's recheck all our sessions */
2869         log_debug("System manager has been reloaded, rechecking sessions...");
2870
2871         HASHMAP_FOREACH(session, m->sessions, i)
2872                 session_add_to_gc_queue(session);
2873
2874         return 0;
2875 }
2876 #endif // 0
2877
2878 int manager_send_changed(Manager *manager, const char *property, ...) {
2879         char **l;
2880
2881         assert(manager);
2882
2883         l = strv_from_stdarg_alloca(property);
2884
2885         return sd_bus_emit_properties_changed_strv(
2886                         manager->bus,
2887                         "/org/freedesktop/login1",
2888                         "org.freedesktop.login1.Manager",
2889                         l);
2890 }
2891
2892 #if 0 /// UNNEEDED by elogind
2893 static int strdup_job(sd_bus_message *reply, char **job) {
2894         const char *j;
2895         char *copy;
2896         int r;
2897
2898         r = sd_bus_message_read(reply, "o", &j);
2899         if (r < 0)
2900                 return r;
2901
2902         copy = strdup(j);
2903         if (!copy)
2904                 return -ENOMEM;
2905
2906         *job = copy;
2907         return 1;
2908 }
2909
2910 int manager_start_slice(
2911                 Manager *manager,
2912                 const char *slice,
2913                 const char *description,
2914                 const char *after,
2915                 const char *after2,
2916                 uint64_t tasks_max,
2917                 sd_bus_error *error,
2918                 char **job) {
2919
2920         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2921         int r;
2922
2923         assert(manager);
2924         assert(slice);
2925
2926         r = sd_bus_message_new_method_call(
2927                         manager->bus,
2928                         &m,
2929                         "org.freedesktop.systemd1",
2930                         "/org/freedesktop/systemd1",
2931                         "org.freedesktop.systemd1.Manager",
2932                         "StartTransientUnit");
2933         if (r < 0)
2934                 return r;
2935
2936         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2937         if (r < 0)
2938                 return r;
2939
2940         r = sd_bus_message_open_container(m, 'a', "(sv)");
2941         if (r < 0)
2942                 return r;
2943
2944         if (!isempty(description)) {
2945                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2946                 if (r < 0)
2947                         return r;
2948         }
2949
2950         if (!isempty(after)) {
2951                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2952                 if (r < 0)
2953                         return r;
2954         }
2955
2956         if (!isempty(after2)) {
2957                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2958                 if (r < 0)
2959                         return r;
2960         }
2961
2962         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
2963         if (r < 0)
2964                 return r;
2965
2966         r = sd_bus_message_close_container(m);
2967         if (r < 0)
2968                 return r;
2969
2970         r = sd_bus_message_append(m, "a(sa(sv))", 0);
2971         if (r < 0)
2972                 return r;
2973
2974         r = sd_bus_call(manager->bus, m, 0, error, &reply);
2975         if (r < 0)
2976                 return r;
2977
2978         if (job)
2979                 return strdup_job(reply, job);
2980         return 1;
2981 }
2982
2983 int manager_start_scope(
2984                 Manager *manager,
2985                 const char *scope,
2986                 pid_t pid,
2987                 const char *slice,
2988                 const char *description,
2989                 const char *after,
2990                 const char *after2,
2991                 uint64_t tasks_max,
2992                 sd_bus_error *error,
2993                 char **job) {
2994
2995         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2996         int r;
2997
2998         assert(manager);
2999         assert(scope);
3000         assert(pid > 1);
3001
3002         r = sd_bus_message_new_method_call(
3003                         manager->bus,
3004                         &m,
3005                         "org.freedesktop.systemd1",
3006                         "/org/freedesktop/systemd1",
3007                         "org.freedesktop.systemd1.Manager",
3008                         "StartTransientUnit");
3009         if (r < 0)
3010                 return r;
3011
3012         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3013         if (r < 0)
3014                 return r;
3015
3016         r = sd_bus_message_open_container(m, 'a', "(sv)");
3017         if (r < 0)
3018                 return r;
3019
3020         if (!isempty(slice)) {
3021                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3022                 if (r < 0)
3023                         return r;
3024         }
3025
3026         if (!isempty(description)) {
3027                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3028                 if (r < 0)
3029                         return r;
3030         }
3031
3032         if (!isempty(after)) {
3033                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3034                 if (r < 0)
3035                         return r;
3036         }
3037
3038         if (!isempty(after2)) {
3039                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3040                 if (r < 0)
3041                         return r;
3042         }
3043
3044         /* cgroup empty notification is not available in containers
3045          * currently. To make this less problematic, let's shorten the
3046          * stop timeout for sessions, so that we don't wait
3047          * forever. */
3048
3049         /* Make sure that the session shells are terminated with
3050          * SIGHUP since bash and friends tend to ignore SIGTERM */
3051         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3052         if (r < 0)
3053                 return r;
3054
3055         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3056         if (r < 0)
3057                 return r;
3058
3059         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3060         if (r < 0)
3061                 return r;
3062
3063         r = sd_bus_message_close_container(m);
3064         if (r < 0)
3065                 return r;
3066
3067         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3068         if (r < 0)
3069                 return r;
3070
3071         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3072         if (r < 0)
3073                 return r;
3074
3075         if (job)
3076                 return strdup_job(reply, job);
3077         return 1;
3078 }
3079
3080 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3081         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3082         int r;
3083
3084         assert(manager);
3085         assert(unit);
3086
3087         r = sd_bus_call_method(
3088                         manager->bus,
3089                         "org.freedesktop.systemd1",
3090                         "/org/freedesktop/systemd1",
3091                         "org.freedesktop.systemd1.Manager",
3092                         "StartUnit",
3093                         error,
3094                         &reply,
3095                         "ss", unit, "replace");
3096         if (r < 0)
3097                 return r;
3098
3099         if (job)
3100                 return strdup_job(reply, job);
3101         return 1;
3102 }
3103
3104 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3105         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3106         int r;
3107
3108         assert(manager);
3109         assert(unit);
3110
3111         r = sd_bus_call_method(
3112                         manager->bus,
3113                         "org.freedesktop.systemd1",
3114                         "/org/freedesktop/systemd1",
3115                         "org.freedesktop.systemd1.Manager",
3116                         "StopUnit",
3117                         error,
3118                         &reply,
3119                         "ss", unit, "fail");
3120         if (r < 0) {
3121                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3122                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3123
3124                         if (job)
3125                                 *job = NULL;
3126
3127                         sd_bus_error_free(error);
3128                         return 0;
3129                 }
3130
3131                 return r;
3132         }
3133
3134         if (job)
3135                 return strdup_job(reply, job);
3136         return 1;
3137 }
3138
3139 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3140         _cleanup_free_ char *path = NULL;
3141         int r;
3142
3143         assert(manager);
3144         assert(scope);
3145
3146         path = unit_dbus_path_from_name(scope);
3147         if (!path)
3148                 return -ENOMEM;
3149
3150         r = sd_bus_call_method(
3151                         manager->bus,
3152                         "org.freedesktop.systemd1",
3153                         path,
3154                         "org.freedesktop.systemd1.Scope",
3155                         "Abandon",
3156                         error,
3157                         NULL,
3158                         NULL);
3159         if (r < 0) {
3160                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3161                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3162                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3163                         sd_bus_error_free(error);
3164                         return 0;
3165                 }
3166
3167                 return r;
3168         }
3169
3170         return 1;
3171 }
3172
3173 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3174         assert(manager);
3175         assert(unit);
3176
3177         return sd_bus_call_method(
3178                         manager->bus,
3179                         "org.freedesktop.systemd1",
3180                         "/org/freedesktop/systemd1",
3181                         "org.freedesktop.systemd1.Manager",
3182                         "KillUnit",
3183                         error,
3184                         NULL,
3185                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3186 }
3187
3188 int manager_unit_is_active(Manager *manager, const char *unit) {
3189         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3190         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3191         _cleanup_free_ char *path = NULL;
3192         const char *state;
3193         int r;
3194
3195         assert(manager);
3196         assert(unit);
3197
3198         path = unit_dbus_path_from_name(unit);
3199         if (!path)
3200                 return -ENOMEM;
3201
3202         r = sd_bus_get_property(
3203                         manager->bus,
3204                         "org.freedesktop.systemd1",
3205                         path,
3206                         "org.freedesktop.systemd1.Unit",
3207                         "ActiveState",
3208                         &error,
3209                         &reply,
3210                         "s");
3211         if (r < 0) {
3212                 /* systemd might have droppped off momentarily, let's
3213                  * not make this an error */
3214                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3215                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3216                         return true;
3217
3218                 /* If the unit is already unloaded then it's not
3219                  * active */
3220                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3221                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3222                         return false;
3223
3224                 return r;
3225         }
3226
3227         r = sd_bus_message_read(reply, "s", &state);
3228         if (r < 0)
3229                 return -EINVAL;
3230
3231         return !streq(state, "inactive") && !streq(state, "failed");
3232 }
3233
3234 int manager_job_is_active(Manager *manager, const char *path) {
3235         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3236         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3237         int r;
3238
3239         assert(manager);
3240         assert(path);
3241
3242         r = sd_bus_get_property(
3243                         manager->bus,
3244                         "org.freedesktop.systemd1",
3245                         path,
3246                         "org.freedesktop.systemd1.Job",
3247                         "State",
3248                         &error,
3249                         &reply,
3250                         "s");
3251         if (r < 0) {
3252                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3253                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3254                         return true;
3255
3256                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3257                         return false;
3258
3259                 return r;
3260         }
3261
3262         /* We don't actually care about the state really. The fact
3263          * that we could read the job state is enough for us */
3264
3265         return true;
3266 }
3267 #endif // 0