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 /// Additional 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 #if 1 /// elogind must queue this session
 922         session_add_to_gc_queue(session);
 923 #endif // 1
 924
 925         return sd_bus_reply_method_return(message, NULL);
 926 }
 927
 928 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 929         Manager *m = userdata;
 930         Session *session;
 931         const char *name;
 932         int r;
 933
 934         assert(message);
 935         assert(m);
 936
 937         r = sd_bus_message_read(message, "s", &name);
 938         if (r < 0)
 939                 return r;
 940
 941         r = manager_get_session_from_creds(m, message, name, error, &session);
 942         if (r < 0)
 943                 return r;
 944
 945         return bus_session_method_activate(message, session, error);
 946 }
 947
 948 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 949         const char *session_name, *seat_name;
 950         Manager *m = userdata;
 951         Session *session;
 952         Seat *seat;
 953         int r;
 954
 955         assert(message);
 956         assert(m);
 957
 958         /* Same as ActivateSession() but refuses to work if
 959          * the seat doesn't match */
 960
 961         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 962         if (r < 0)
 963                 return r;
 964
 965         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 966         if (r < 0)
 967                 return r;
 968
 969         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 970         if (r < 0)
 971                 return r;
 972
 973         if (session->seat != seat)
 974                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 975
 976         r = session_activate(session);
 977         if (r < 0)
 978                 return r;
 979
 980         return sd_bus_reply_method_return(message, NULL);
 981 }
 982
 983 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 984         Manager *m = userdata;
 985         Session *session;
 986         const char *name;
 987         int r;
 988
 989         assert(message);
 990         assert(m);
 991
 992         r = sd_bus_message_read(message, "s", &name);
 993         if (r < 0)
 994                 return r;
 995
 996         r = manager_get_session_from_creds(m, message, name, error, &session);
 997         if (r < 0)
 998                 return r;
 999
1000         return bus_session_method_lock(message, session, error);
1001 }
1002
1003 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1004         Manager *m = userdata;
1005         int r;
1006
1007         assert(message);
1008         assert(m);
1009
1010         r = bus_verify_polkit_async(
1011                         message,
1012                         CAP_SYS_ADMIN,
1013                         "org.freedesktop.login1.lock-sessions",
1014                         NULL,
1015                         false,
1016                         UID_INVALID,
1017                         &m->polkit_registry,
1018                         error);
1019         if (r < 0)
1020                 return r;
1021         if (r == 0)
1022                 return 1; /* Will call us back */
1023
1024         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1025         if (r < 0)
1026                 return r;
1027
1028         return sd_bus_reply_method_return(message, NULL);
1029 }
1030
1031 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1032         const char *name;
1033         Manager *m = userdata;
1034         Session *session;
1035         int r;
1036
1037         assert(message);
1038         assert(m);
1039
1040         r = sd_bus_message_read(message, "s", &name);
1041         if (r < 0)
1042                 return r;
1043
1044         r = manager_get_session_from_creds(m, message, name, error, &session);
1045         if (r < 0)
1046                 return r;
1047
1048         return bus_session_method_kill(message, session, error);
1049 }
1050
1051 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1052         Manager *m = userdata;
1053         uint32_t uid;
1054         User *user;
1055         int r;
1056
1057         assert(message);
1058         assert(m);
1059
1060         r = sd_bus_message_read(message, "u", &uid);
1061         if (r < 0)
1062                 return r;
1063
1064         r = manager_get_user_from_creds(m, message, uid, error, &user);
1065         if (r < 0)
1066                 return r;
1067
1068         return bus_user_method_kill(message, user, error);
1069 }
1070
1071 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1072         Manager *m = userdata;
1073         const char *name;
1074         Session *session;
1075         int r;
1076
1077         assert(message);
1078         assert(m);
1079
1080         r = sd_bus_message_read(message, "s", &name);
1081         if (r < 0)
1082                 return r;
1083
1084         r = manager_get_session_from_creds(m, message, name, error, &session);
1085         if (r < 0)
1086                 return r;
1087
1088         return bus_session_method_terminate(message, session, error);
1089 }
1090
1091 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1092         Manager *m = userdata;
1093         uint32_t uid;
1094         User *user;
1095         int r;
1096
1097         assert(message);
1098         assert(m);
1099
1100         r = sd_bus_message_read(message, "u", &uid);
1101         if (r < 0)
1102                 return r;
1103
1104         r = manager_get_user_from_creds(m, message, uid, error, &user);
1105         if (r < 0)
1106                 return r;
1107
1108         return bus_user_method_terminate(message, user, error);
1109 }
1110
1111 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1112         Manager *m = userdata;
1113         const char *name;
1114         Seat *seat;
1115         int r;
1116
1117         assert(message);
1118         assert(m);
1119
1120         r = sd_bus_message_read(message, "s", &name);
1121         if (r < 0)
1122                 return r;
1123
1124         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1125         if (r < 0)
1126                 return r;
1127
1128         return bus_seat_method_terminate(message, seat, error);
1129 }
1130
1131 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1132         _cleanup_free_ char *cc = NULL;
1133         Manager *m = userdata;
1134         int r, b, interactive;
1135         struct passwd *pw;
1136         const char *path;
1137         uint32_t uid;
1138         bool self = false;
1139
1140         assert(message);
1141         assert(m);
1142
1143         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1144         if (r < 0)
1145                 return r;
1146
1147         if (uid == UID_INVALID) {
1148                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1149
1150                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1151                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1152                 if (r < 0)
1153                         return r;
1154
1155                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1156                 if (r < 0)
1157                         return r;
1158
1159                 self = true;
1160
1161         } else if (!uid_is_valid(uid))
1162                 return -EINVAL;
1163
1164         errno = 0;
1165         pw = getpwuid(uid);
1166         if (!pw)
1167                 return errno > 0 ? -errno : -ENOENT;
1168
1169         r = bus_verify_polkit_async(
1170                         message,
1171                         CAP_SYS_ADMIN,
1172                         self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger",
1173                         NULL,
1174                         interactive,
1175                         UID_INVALID,
1176                         &m->polkit_registry,
1177                         error);
1178         if (r < 0)
1179                 return r;
1180         if (r == 0)
1181                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1182
1183         mkdir_p_label("/var/lib/systemd", 0755);
1184
1185         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1186         if (r < 0)
1187                 return r;
1188
1189         cc = cescape(pw->pw_name);
1190         if (!cc)
1191                 return -ENOMEM;
1192
1193         path = strjoina("/var/lib/systemd/linger/", cc);
1194         if (b) {
1195                 User *u;
1196
1197                 r = touch(path);
1198                 if (r < 0)
1199                         return r;
1200
1201                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1202                         user_start(u);
1203
1204         } else {
1205                 User *u;
1206
1207                 r = unlink(path);
1208                 if (r < 0 && errno != ENOENT)
1209                         return -errno;
1210
1211                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1212                 if (u)
1213                         user_add_to_gc_queue(u);
1214         }
1215
1216         return sd_bus_reply_method_return(message, NULL);
1217 }
1218
1219 static int trigger_device(Manager *m, struct udev_device *d) {
1220         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1221         struct udev_list_entry *first, *item;
1222         int r;
1223
1224         assert(m);
1225
1226         e = udev_enumerate_new(m->udev);
1227         if (!e)
1228                 return -ENOMEM;
1229
1230         if (d) {
1231                 r = udev_enumerate_add_match_parent(e, d);
1232                 if (r < 0)
1233                         return r;
1234         }
1235
1236         r = udev_enumerate_scan_devices(e);
1237         if (r < 0)
1238                 return r;
1239
1240         first = udev_enumerate_get_list_entry(e);
1241         udev_list_entry_foreach(item, first) {
1242                 _cleanup_free_ char *t = NULL;
1243                 const char *p;
1244
1245                 p = udev_list_entry_get_name(item);
1246
1247                 t = strappend(p, "/uevent");
1248                 if (!t)
1249                         return -ENOMEM;
1250
1251                 write_string_file(t, "change", WRITE_STRING_FILE_CREATE);
1252         }
1253
1254         return 0;
1255 }
1256
1257 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1258         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1259         _cleanup_free_ char *rule = NULL, *file = NULL;
1260         const char *id_for_seat;
1261         int r;
1262
1263         assert(m);
1264         assert(seat);
1265         assert(sysfs);
1266
1267         d = udev_device_new_from_syspath(m->udev, sysfs);
1268         if (!d)
1269                 return -ENODEV;
1270
1271         if (!udev_device_has_tag(d, "seat"))
1272                 return -ENODEV;
1273
1274         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1275         if (!id_for_seat)
1276                 return -ENODEV;
1277
1278         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1279                 return -ENOMEM;
1280
1281         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1282                 return -ENOMEM;
1283
1284         mkdir_p_label("/etc/udev/rules.d", 0755);
1285         r = write_string_file_atomic_label(file, rule);
1286         if (r < 0)
1287                 return r;
1288
1289         return trigger_device(m, d);
1290 }
1291
1292 static int flush_devices(Manager *m) {
1293         _cleanup_closedir_ DIR *d;
1294
1295         assert(m);
1296
1297         d = opendir("/etc/udev/rules.d");
1298         if (!d) {
1299                 if (errno != ENOENT)
1300                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1301         } else {
1302                 struct dirent *de;
1303
1304                 while ((de = readdir(d))) {
1305
1306                         if (!dirent_is_file(de))
1307                                 continue;
1308
1309                         if (!startswith(de->d_name, "72-seat-"))
1310                                 continue;
1311
1312                         if (!endswith(de->d_name, ".rules"))
1313                                 continue;
1314
1315                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1316                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1317                 }
1318         }
1319
1320         return trigger_device(m, NULL);
1321 }
1322
1323 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1324         const char *sysfs, *seat;
1325         Manager *m = userdata;
1326         int interactive, r;
1327
1328         assert(message);
1329         assert(m);
1330
1331         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1332         if (r < 0)
1333                 return r;
1334
1335         if (!path_startswith(sysfs, "/sys"))
1336                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1337
1338         if (!seat_name_is_valid(seat))
1339                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1340
1341         r = bus_verify_polkit_async(
1342                         message,
1343                         CAP_SYS_ADMIN,
1344                         "org.freedesktop.login1.attach-device",
1345                         NULL,
1346                         interactive,
1347                         UID_INVALID,
1348                         &m->polkit_registry,
1349                         error);
1350         if (r < 0)
1351                 return r;
1352         if (r == 0)
1353                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1354
1355         r = attach_device(m, seat, sysfs);
1356         if (r < 0)
1357                 return r;
1358
1359         return sd_bus_reply_method_return(message, NULL);
1360 }
1361
1362 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1363         Manager *m = userdata;
1364         int interactive, r;
1365
1366         assert(message);
1367         assert(m);
1368
1369         r = sd_bus_message_read(message, "b", &interactive);
1370         if (r < 0)
1371                 return r;
1372
1373         r = bus_verify_polkit_async(
1374                         message,
1375                         CAP_SYS_ADMIN,
1376                         "org.freedesktop.login1.flush-devices",
1377                         NULL,
1378                         interactive,
1379                         UID_INVALID,
1380                         &m->polkit_registry,
1381                         error);
1382         if (r < 0)
1383                 return r;
1384         if (r == 0)
1385                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1386
1387         r = flush_devices(m);
1388         if (r < 0)
1389                 return r;
1390
1391         return sd_bus_reply_method_return(message, NULL);
1392 }
1393
1394 static int have_multiple_sessions(
1395                 Manager *m,
1396                 uid_t uid) {
1397
1398         Session *session;
1399         Iterator i;
1400
1401         assert(m);
1402
1403         /* Check for other users' sessions. Greeter sessions do not
1404          * count, and non-login sessions do not count either. */
1405         HASHMAP_FOREACH(session, m->sessions, i)
1406                 if (session->class == SESSION_USER &&
1407                     session->user->uid != uid)
1408                         return true;
1409
1410         return false;
1411 }
1412
1413 static int bus_manager_log_shutdown(
1414                 Manager *m,
1415                 InhibitWhat w,
1416 #if 0 /// elogind does not support systemd units
1417                 const char *unit_name) {
1418
1419         const char *p, *q;
1420
1421         assert(m);
1422         assert(unit_name);
1423
1424         if (w != INHIBIT_SHUTDOWN)
1425                 return 0;
1426
1427         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1428                 p = "MESSAGE=System is powering down";
1429                 q = "SHUTDOWN=power-off";
1430         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1431                 p = "MESSAGE=System is halting";
1432                 q = "SHUTDOWN=halt";
1433         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1434                 p = "MESSAGE=System is rebooting";
1435                 q = "SHUTDOWN=reboot";
1436         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1437                 p = "MESSAGE=System is rebooting with kexec";
1438                 q = "SHUTDOWN=kexec";
1439         } else {
1440                 p = "MESSAGE=System is shutting down";
1441                 q = NULL;
1442         }
1443 #else
1444                  HandleAction action) {
1445
1446          const char *p, *q;
1447
1448          assert(m);
1449
1450          if (w != INHIBIT_SHUTDOWN)
1451                  return 0;
1452
1453          switch (action) {
1454          case HANDLE_POWEROFF:
1455                  p = "MESSAGE=System is powering down.";
1456                  q = "SHUTDOWN=power-off";
1457                  break;
1458          case HANDLE_HALT:
1459                  p = "MESSAGE=System is halting.";
1460                  q = "SHUTDOWN=halt";
1461                  break;
1462          case HANDLE_REBOOT:
1463                  p = "MESSAGE=System is rebooting.";
1464                  q = "SHUTDOWN=reboot";
1465                  break;
1466          case HANDLE_KEXEC:
1467                  p = "MESSAGE=System is rebooting with kexec.";
1468                  q = "SHUTDOWN=kexec";
1469                  break;
1470          default:
1471                  p = "MESSAGE=System is shutting down.";
1472                  q = NULL;
1473          }
1474 #endif // 0
1475         if (isempty(m->wall_message))
1476                 p = strjoina(p, ".");
1477         else
1478                 p = strjoina(p, " (", m->wall_message, ").");
1479
1480         return log_struct(LOG_NOTICE,
1481                           LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
1482                           p,
1483                           q,
1484                           NULL);
1485 }
1486
1487 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1488         Manager *m = userdata;
1489
1490         assert(e);
1491         assert(m);
1492
1493         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1494         return 0;
1495 }
1496
1497 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1498         int r;
1499
1500         assert(m);
1501
1502         if (until <= now(CLOCK_MONOTONIC))
1503                 return 0;
1504
1505         /* We want to ignore the lid switch for a while after each
1506          * suspend, and after boot-up. Hence let's install a timer for
1507          * this. As long as the event source exists we ignore the lid
1508          * switch. */
1509
1510         if (m->lid_switch_ignore_event_source) {
1511                 usec_t u;
1512
1513                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1514                 if (r < 0)
1515                         return r;
1516
1517                 if (until <= u)
1518                         return 0;
1519
1520                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1521         } else
1522                 r = sd_event_add_time(
1523                                 m->event,
1524                                 &m->lid_switch_ignore_event_source,
1525                                 CLOCK_MONOTONIC,
1526                                 until, 0,
1527                                 lid_switch_ignore_handler, m);
1528
1529         return r;
1530 }
1531
1532 static void reset_scheduled_shutdown(Manager *m) {
1533         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1534         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1535         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1536         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1537         m->scheduled_shutdown_timeout = 0;
1538         m->shutdown_dry_run = false;
1539
1540         if (m->unlink_nologin) {
1541                 (void) unlink("/run/nologin");
1542                 m->unlink_nologin = false;
1543         }
1544 }
1545
1546 static int execute_shutdown_or_sleep(
1547                 Manager *m,
1548                 InhibitWhat w,
1549                 HandleAction action,
1550                 sd_bus_error *error) {
1551
1552 #if 0 /// elogind does not need these, we do it ourselves
1553         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1554         char *c = NULL;
1555         const char *p;
1556 #else
1557         /* needed for update-utmp */
1558         char** argv_utmp = NULL;
1559 #endif // 0
1560         int r;
1561
1562         assert(m);
1563         assert(w >= 0);
1564         assert(w < _INHIBIT_WHAT_MAX);
1565
1566         bus_manager_log_shutdown(m, w, action);
1567
1568 #if 0 /// elogind does it directly without depending on systemd running the system
1569         if (m->shutdown_dry_run) {
1570                 log_info("Running in dry run, suppressing action.");
1571                 reset_scheduled_shutdown(m);
1572         } else {
1573                 r = sd_bus_call_method(
1574                                 m->bus,
1575                                 "org.freedesktop.systemd1",
1576                                 "/org/freedesktop/systemd1",
1577                                 "org.freedesktop.systemd1.Manager",
1578                                 "StartUnit",
1579                                 error,
1580                                 &reply,
1581                                 "ss", unit_name, "replace-irreversibly");
1582                 if (r < 0)
1583                         return r;
1584
1585                 r = sd_bus_message_read(reply, "o", &p);
1586                 if (r < 0)
1587                         return r;
1588
1589                 c = strdup(p);
1590                 if (!c)
1591                         return -ENOMEM;
1592
1593                 m->action_unit = unit_name;
1594                 free(m->action_job);
1595                 m->action_job = c;
1596                 m->action_what = w;
1597         }
1598 #else
1599         if (IN_SET(action, HANDLE_HALT, HANDLE_POWEROFF, HANDLE_REBOOT)) {
1600
1601                 /* As we have no systemd update-utmp daemon running, we have to
1602                  * set the relevant utmp/wtmp entries ourselves.
1603                  */
1604
1605                 if (strv_extend(&argv_utmp, "elogind") < 0)
1606                         return log_oom();
1607
1608                 if (HANDLE_REBOOT == action) {
1609                         if (strv_extend(&argv_utmp, "reboot") < 0)
1610                                 return log_oom();
1611                 } else {
1612                         if (strv_extend(&argv_utmp, "shutdown") < 0)
1613                                 return log_oom();
1614                 }
1615
1616                  /* This comes from our patched update-utmp/update-utmp.c */
1617                 update_utmp(2, argv_utmp, m->bus);
1618                 strv_free(argv_utmp);
1619         }
1620
1621         /* Now perform the requested action */
1622         r = shutdown_or_sleep(m, action);
1623
1624         /* no more pending actions, whether this failed or not */
1625         m->pending_action = HANDLE_IGNORE;
1626         m->action_what    = 0;
1627         if (r < 0)
1628                 return r;
1629 #endif // 0
1630
1631         /* Make sure the lid switch is ignored for a while */
1632         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1633
1634         return 0;
1635 }
1636
1637 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1638
1639         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1640         Inhibitor *offending = NULL;
1641         int r;
1642
1643         assert(manager);
1644
1645         if ( (0 == manager->action_what) || (HANDLE_IGNORE == manager->pending_action) )
1646                 return 0;
1647
1648         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1649                 _cleanup_free_ char *comm = NULL, *u = NULL;
1650
1651                 if (!timeout)
1652                         return 0;
1653
1654                 (void) get_process_comm(offending->pid, &comm);
1655                 u = uid_to_name(offending->uid);
1656
1657                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1658                            offending->uid, strna(u),
1659                            offending->pid, strna(comm));
1660         }
1661
1662         /* Actually do the operation */
1663         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->pending_action, &error);
1664         if (r < 0) {
1665                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1666
1667                 manager->pending_action = HANDLE_IGNORE;
1668                 manager->action_what    = 0;
1669                 return r;
1670         }
1671
1672         return 1;
1673 }
1674
1675 static int manager_inhibit_timeout_handler(
1676                         sd_event_source *s,
1677                         uint64_t usec,
1678                         void *userdata) {
1679
1680         Manager *manager = userdata;
1681         int r;
1682
1683         assert(manager);
1684         assert(manager->inhibit_timeout_source == s);
1685
1686         r = manager_dispatch_delayed(manager, true);
1687         return (r < 0) ? r : 0;
1688 }
1689
1690 static int delay_shutdown_or_sleep(
1691                 Manager *m,
1692                 InhibitWhat w,
1693                 HandleAction action) {
1694
1695         int r;
1696         usec_t timeout_val;
1697
1698         assert(m);
1699         assert(w >= 0);
1700         assert(w < _INHIBIT_WHAT_MAX);
1701
1702         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1703
1704         if (m->inhibit_timeout_source) {
1705                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1706                 if (r < 0)
1707                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1708
1709                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1710                 if (r < 0)
1711                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1712         } else {
1713                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1714                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1715                 if (r < 0)
1716                         return r;
1717         }
1718
1719         m->pending_action = action;
1720         m->action_what = w;
1721
1722         return 0;
1723 }
1724
1725 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1726
1727         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1728                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1729                 [INHIBIT_SLEEP] = "PrepareForSleep"
1730         };
1731
1732         int active = _active;
1733
1734         assert(m);
1735         assert(w >= 0);
1736         assert(w < _INHIBIT_WHAT_MAX);
1737         assert(signal_name[w]);
1738
1739         return sd_bus_emit_signal(m->bus,
1740                                   "/org/freedesktop/login1",
1741                                   "org.freedesktop.login1.Manager",
1742                                   signal_name[w],
1743                                   "b",
1744                                   active);
1745 }
1746
1747 int bus_manager_shutdown_or_sleep_now_or_later(
1748                 Manager *m,
1749                 HandleAction action,
1750                 InhibitWhat w,
1751                 sd_bus_error *error) {
1752
1753         bool delayed;
1754         int r;
1755
1756         assert(m);
1757         assert(w >= 0);
1758         assert(w <= _INHIBIT_WHAT_MAX);
1759
1760         /* Tell everybody to prepare for shutdown/sleep */
1761         send_prepare_for(m, w, true);
1762
1763         delayed =
1764                 m->inhibit_delay_max > 0 &&
1765                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1766
1767         if (delayed)
1768                 /* Shutdown is delayed, keep in mind what we
1769                  * want to do, and start a timeout */
1770                 r = delay_shutdown_or_sleep(m, w, action);
1771         else
1772                 /* Shutdown is not delayed, execute it
1773                  * immediately */
1774                 r = execute_shutdown_or_sleep(m, w, action, error);
1775
1776         return r;
1777 }
1778
1779 static int verify_shutdown_creds(
1780                 Manager *m,
1781                 sd_bus_message *message,
1782                 InhibitWhat w,
1783                 bool interactive,
1784                 const char *action,
1785                 const char *action_multiple_sessions,
1786                 const char *action_ignore_inhibit,
1787                 sd_bus_error *error) {
1788
1789         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1790         bool multiple_sessions, blocked;
1791         uid_t uid;
1792         int r;
1793
1794         assert(m);
1795         assert(message);
1796         assert(w >= 0);
1797         assert(w <= _INHIBIT_WHAT_MAX);
1798
1799         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1800         if (r < 0)
1801                 return r;
1802
1803         r = sd_bus_creds_get_euid(creds, &uid);
1804         if (r < 0)
1805                 return r;
1806
1807         r = have_multiple_sessions(m, uid);
1808         if (r < 0)
1809                 return r;
1810
1811         multiple_sessions = r > 0;
1812         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1813
1814         if (multiple_sessions && action_multiple_sessions) {
1815                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1816                 if (r < 0)
1817                         return r;
1818                 if (r == 0)
1819                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1820         }
1821
1822         if (blocked && action_ignore_inhibit) {
1823                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1824                 if (r < 0)
1825                         return r;
1826                 if (r == 0)
1827                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1828         }
1829
1830         if (!multiple_sessions && !blocked && action) {
1831                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1832                 if (r < 0)
1833                         return r;
1834                 if (r == 0)
1835                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1836         }
1837
1838         return 0;
1839 }
1840
1841 static int method_do_shutdown_or_sleep(
1842                 Manager *m,
1843                 sd_bus_message *message,
1844                 HandleAction sleep_action,
1845                 InhibitWhat w,
1846                 const char *action,
1847                 const char *action_multiple_sessions,
1848                 const char *action_ignore_inhibit,
1849                 const char *sleep_verb,
1850                 sd_bus_error *error) {
1851
1852         int interactive, r;
1853
1854         assert(m);
1855         assert(message);
1856         assert(w >= 0);
1857         assert(w <= _INHIBIT_WHAT_MAX);
1858
1859         r = sd_bus_message_read(message, "b", &interactive);
1860         if (r < 0)
1861                 return r;
1862
1863         /* Don't allow multiple jobs being executed at the same time */
1864         if (m->action_what)
1865                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1866
1867         if (sleep_verb) {
1868                 r = can_sleep(m, sleep_verb);
1869                 if (r < 0)
1870                         return r;
1871
1872                 if (r == 0)
1873                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1874         }
1875
1876         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1877                                   action_ignore_inhibit, error);
1878         if (r != 0)
1879                 return r;
1880
1881         r = bus_manager_shutdown_or_sleep_now_or_later(m, sleep_action, w, error);
1882         if (r < 0)
1883                 return r;
1884
1885         return sd_bus_reply_method_return(message, NULL);
1886 }
1887
1888 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1889         Manager *m = userdata;
1890
1891         return method_do_shutdown_or_sleep(
1892                         m, message,
1893                         HANDLE_POWEROFF,
1894                         INHIBIT_SHUTDOWN,
1895                         "org.freedesktop.login1.power-off",
1896                         "org.freedesktop.login1.power-off-multiple-sessions",
1897                         "org.freedesktop.login1.power-off-ignore-inhibit",
1898                         NULL,
1899                         error);
1900 }
1901
1902 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1903         Manager *m = userdata;
1904
1905         return method_do_shutdown_or_sleep(
1906                         m, message,
1907                         HANDLE_REBOOT,
1908                         INHIBIT_SHUTDOWN,
1909                         "org.freedesktop.login1.reboot",
1910                         "org.freedesktop.login1.reboot-multiple-sessions",
1911                         "org.freedesktop.login1.reboot-ignore-inhibit",
1912                         NULL,
1913                         error);
1914 }
1915
1916 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1917         Manager *m = userdata;
1918
1919         return method_do_shutdown_or_sleep(
1920                         m, message,
1921                         HANDLE_SUSPEND,
1922                         INHIBIT_SLEEP,
1923                         "org.freedesktop.login1.suspend",
1924                         "org.freedesktop.login1.suspend-multiple-sessions",
1925                         "org.freedesktop.login1.suspend-ignore-inhibit",
1926                         "suspend",
1927                         error);
1928 }
1929
1930 static int nologin_timeout_handler(
1931                         sd_event_source *s,
1932                         uint64_t usec,
1933                         void *userdata) {
1934
1935         Manager *m = userdata;
1936         int r;
1937
1938         log_info("Creating /run/nologin, blocking further logins...");
1939
1940         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1941         if (r < 0)
1942                 log_error_errno(r, "Failed to create /run/nologin: %m");
1943         else
1944                 m->unlink_nologin = true;
1945
1946         return 0;
1947 }
1948
1949 static int update_schedule_file(Manager *m) {
1950         _cleanup_free_ char *temp_path = NULL;
1951         _cleanup_fclose_ FILE *f = NULL;
1952         int r;
1953
1954         assert(m);
1955
1956         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1957         if (r < 0)
1958                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1959
1960         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1961         if (r < 0)
1962                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1963
1964         (void) fchmod(fileno(f), 0644);
1965
1966         fprintf(f,
1967                 "USEC="USEC_FMT"\n"
1968                 "WARN_WALL=%i\n"
1969                 "MODE=%s\n",
1970                 m->scheduled_shutdown_timeout,
1971                 m->enable_wall_messages,
1972                 m->scheduled_shutdown_type);
1973
1974         if (!isempty(m->wall_message)) {
1975                 _cleanup_free_ char *t;
1976
1977                 t = cescape(m->wall_message);
1978                 if (!t) {
1979                         r = -ENOMEM;
1980                         goto fail;
1981                 }
1982
1983                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1984         }
1985
1986         r = fflush_and_check(f);
1987         if (r < 0)
1988                 goto fail;
1989
1990         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1991                 r = -errno;
1992                 goto fail;
1993         }
1994
1995         return 0;
1996
1997 fail:
1998         (void) unlink(temp_path);
1999         (void) unlink("/run/systemd/shutdown/scheduled");
2000
2001         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2002 }
2003
2004 static int manager_scheduled_shutdown_handler(
2005                         sd_event_source *s,
2006                         uint64_t usec,
2007                         void *userdata) {
2008
2009         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2010         Manager *m = userdata;
2011         HandleAction action;
2012         int r;
2013
2014         assert(m);
2015
2016         if (isempty(m->scheduled_shutdown_type))
2017                 return 0;
2018
2019         if (streq(m->scheduled_shutdown_type, "halt"))
2020                 action = HANDLE_HALT;
2021         else if (streq(m->scheduled_shutdown_type, "poweroff"))
2022                 action = HANDLE_POWEROFF;
2023         else
2024                 action = HANDLE_REBOOT;
2025
2026         r = execute_shutdown_or_sleep(m, 0, action, &error);
2027         if (r < 0)
2028                 return log_error_errno(r, "Unable to execute transition to %s: %m", m->scheduled_shutdown_type);
2029
2030         return 0;
2031 }
2032
2033 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2034         Manager *m = userdata;
2035         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2036         const char *action_multiple_sessions = NULL;
2037         const char *action_ignore_inhibit = NULL;
2038         const char *action = NULL;
2039         uint64_t elapse;
2040         char *type;
2041         int r;
2042
2043         assert(m);
2044         assert(message);
2045
2046         r = sd_bus_message_read(message, "st", &type, &elapse);
2047         if (r < 0)
2048                 return r;
2049
2050         if (startswith(type, "dry-")) {
2051                 type += 4;
2052                 m->shutdown_dry_run = true;
2053         }
2054
2055         if (streq(type, "reboot")) {
2056                 action = "org.freedesktop.login1.reboot";
2057                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2058                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2059         } else if (streq(type, "halt")) {
2060                 action = "org.freedesktop.login1.halt";
2061                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2062                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2063         } else if (streq(type, "poweroff")) {
2064                 action = "org.freedesktop.login1.power-off";
2065                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2066                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2067         } else
2068                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2069
2070         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2071                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2072         if (r != 0)
2073                 return r;
2074
2075         if (m->scheduled_shutdown_timeout_source) {
2076                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2077                 if (r < 0)
2078                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2079
2080                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2081                 if (r < 0)
2082                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2083         } else {
2084                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2085                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2086                 if (r < 0)
2087                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2088         }
2089
2090         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2091         if (r < 0) {
2092                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2093                 return log_oom();
2094         }
2095
2096         if (m->nologin_timeout_source) {
2097                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2098                 if (r < 0)
2099                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2100
2101                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2102                 if (r < 0)
2103                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2104         } else {
2105                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2106                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2107                 if (r < 0)
2108                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2109         }
2110
2111         m->scheduled_shutdown_timeout = elapse;
2112
2113         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2114         if (r >= 0) {
2115                 const char *tty = NULL;
2116
2117                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2118                 (void) sd_bus_creds_get_tty(creds, &tty);
2119
2120                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2121                 if (r < 0) {
2122                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2123                         return log_oom();
2124                 }
2125         }
2126
2127         r = manager_setup_wall_message_timer(m);
2128         if (r < 0)
2129                 return r;
2130
2131         if (!isempty(type)) {
2132                 r = update_schedule_file(m);
2133                 if (r < 0)
2134                         return r;
2135         } else
2136                 (void) unlink("/run/systemd/shutdown/scheduled");
2137
2138         return sd_bus_reply_method_return(message, NULL);
2139 }
2140
2141 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2142         Manager *m = userdata;
2143         bool cancelled;
2144
2145         assert(m);
2146         assert(message);
2147
2148         cancelled = m->scheduled_shutdown_type != NULL;
2149         reset_scheduled_shutdown(m);
2150
2151         if (cancelled) {
2152                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2153                 const char *tty = NULL;
2154                 uid_t uid = 0;
2155                 int r;
2156
2157                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2158                 if (r >= 0) {
2159                         (void) sd_bus_creds_get_uid(creds, &uid);
2160                         (void) sd_bus_creds_get_tty(creds, &tty);
2161                 }
2162
2163                 utmp_wall("The system shutdown has been cancelled",
2164                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2165         }
2166
2167         return sd_bus_reply_method_return(message, "b", cancelled);
2168 }
2169
2170 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2171         Manager *m = userdata;
2172
2173         return method_do_shutdown_or_sleep(
2174                         m, message,
2175                         HANDLE_HIBERNATE,
2176                         INHIBIT_SLEEP,
2177                         "org.freedesktop.login1.hibernate",
2178                         "org.freedesktop.login1.hibernate-multiple-sessions",
2179                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2180                         "hibernate",
2181                         error);
2182 }
2183
2184 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2185         Manager *m = userdata;
2186
2187         return method_do_shutdown_or_sleep(
2188                         m, message,
2189                         HANDLE_HYBRID_SLEEP,
2190                         INHIBIT_SLEEP,
2191                         "org.freedesktop.login1.hibernate",
2192                         "org.freedesktop.login1.hibernate-multiple-sessions",
2193                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2194                         "hybrid-sleep",
2195                         error);
2196 }
2197
2198 static int method_can_shutdown_or_sleep(
2199                 Manager *m,
2200                 sd_bus_message *message,
2201                 InhibitWhat w,
2202                 const char *action,
2203                 const char *action_multiple_sessions,
2204                 const char *action_ignore_inhibit,
2205                 const char *sleep_verb,
2206                 sd_bus_error *error) {
2207
2208         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2209         bool multiple_sessions, challenge, blocked;
2210         const char *result = NULL;
2211         uid_t uid;
2212         int r;
2213
2214         assert(m);
2215         assert(message);
2216         assert(w >= 0);
2217         assert(w <= _INHIBIT_WHAT_MAX);
2218         assert(action);
2219         assert(action_multiple_sessions);
2220         assert(action_ignore_inhibit);
2221
2222         if (sleep_verb) {
2223                 r = can_sleep(m, sleep_verb);
2224                 if (r < 0)
2225                         return r;
2226                 if (r == 0)
2227                         return sd_bus_reply_method_return(message, "s", "na");
2228         }
2229
2230         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2231         if (r < 0)
2232                 return r;
2233
2234         r = sd_bus_creds_get_euid(creds, &uid);
2235         if (r < 0)
2236                 return r;
2237
2238         r = have_multiple_sessions(m, uid);
2239         if (r < 0)
2240                 return r;
2241
2242         multiple_sessions = r > 0;
2243         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2244
2245         if (multiple_sessions) {
2246                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2247                 if (r < 0)
2248                         return r;
2249
2250                 if (r > 0)
2251                         result = "yes";
2252                 else if (challenge)
2253                         result = "challenge";
2254                 else
2255                         result = "no";
2256         }
2257
2258         if (blocked) {
2259                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2260                 if (r < 0)
2261                         return r;
2262
2263                 if (r > 0 && !result)
2264                         result = "yes";
2265                 else if (challenge && (!result || streq(result, "yes")))
2266                         result = "challenge";
2267                 else
2268                         result = "no";
2269         }
2270
2271         if (!multiple_sessions && !blocked) {
2272                 /* If neither inhibit nor multiple sessions
2273                  * apply then just check the normal policy */
2274
2275                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2276                 if (r < 0)
2277                         return r;
2278
2279                 if (r > 0)
2280                         result = "yes";
2281                 else if (challenge)
2282                         result = "challenge";
2283                 else
2284                         result = "no";
2285         }
2286
2287         return sd_bus_reply_method_return(message, "s", result);
2288 }
2289
2290 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2291         Manager *m = userdata;
2292
2293         return method_can_shutdown_or_sleep(
2294                         m, message,
2295                         INHIBIT_SHUTDOWN,
2296                         "org.freedesktop.login1.power-off",
2297                         "org.freedesktop.login1.power-off-multiple-sessions",
2298                         "org.freedesktop.login1.power-off-ignore-inhibit",
2299                         NULL,
2300                         error);
2301 }
2302
2303 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2304         Manager *m = userdata;
2305
2306         return method_can_shutdown_or_sleep(
2307                         m, message,
2308                         INHIBIT_SHUTDOWN,
2309                         "org.freedesktop.login1.reboot",
2310                         "org.freedesktop.login1.reboot-multiple-sessions",
2311                         "org.freedesktop.login1.reboot-ignore-inhibit",
2312                         NULL,
2313                         error);
2314 }
2315
2316 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2317         Manager *m = userdata;
2318
2319         return method_can_shutdown_or_sleep(
2320                         m, message,
2321                         INHIBIT_SLEEP,
2322                         "org.freedesktop.login1.suspend",
2323                         "org.freedesktop.login1.suspend-multiple-sessions",
2324                         "org.freedesktop.login1.suspend-ignore-inhibit",
2325                         "suspend",
2326                         error);
2327 }
2328
2329 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2330         Manager *m = userdata;
2331
2332         return method_can_shutdown_or_sleep(
2333                         m, message,
2334                         INHIBIT_SLEEP,
2335                         "org.freedesktop.login1.hibernate",
2336                         "org.freedesktop.login1.hibernate-multiple-sessions",
2337                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2338                         "hibernate",
2339                         error);
2340 }
2341
2342 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2343         Manager *m = userdata;
2344
2345         return method_can_shutdown_or_sleep(
2346                         m, message,
2347                         INHIBIT_SLEEP,
2348                         "org.freedesktop.login1.hibernate",
2349                         "org.freedesktop.login1.hibernate-multiple-sessions",
2350                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2351                         "hybrid-sleep",
2352                         error);
2353 }
2354
2355 static int property_get_reboot_to_firmware_setup(
2356                 sd_bus *bus,
2357                 const char *path,
2358                 const char *interface,
2359                 const char *property,
2360                 sd_bus_message *reply,
2361                 void *userdata,
2362                 sd_bus_error *error) {
2363 #if 0 /// elogind does not support EFI
2364         int r;
2365
2366         assert(bus);
2367         assert(reply);
2368         assert(userdata);
2369
2370         r = efi_get_reboot_to_firmware();
2371         if (r < 0 && r != -EOPNOTSUPP)
2372                 return r;
2373
2374         return sd_bus_message_append(reply, "b", r > 0);
2375 #else
2376         return sd_bus_message_append(reply, "b", false);
2377 #endif // 0
2378 }
2379
2380 static int method_set_reboot_to_firmware_setup(
2381                 sd_bus_message *message,
2382                 void *userdata,
2383                 sd_bus_error *error) {
2384
2385         int b, r;
2386         Manager *m = userdata;
2387
2388         assert(message);
2389         assert(m);
2390
2391         r = sd_bus_message_read(message, "b", &b);
2392         if (r < 0)
2393                 return r;
2394
2395         r = bus_verify_polkit_async(message,
2396                                     CAP_SYS_ADMIN,
2397                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2398                                     NULL,
2399                                     false,
2400                                     UID_INVALID,
2401                                     &m->polkit_registry,
2402                                     error);
2403         if (r < 0)
2404                 return r;
2405         if (r == 0)
2406                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2407
2408 #if 0 /// elogind does not support EFI
2409         r = efi_set_reboot_to_firmware(b);
2410         if (r < 0)
2411                 return r;
2412 #endif // 0
2413
2414         return sd_bus_reply_method_return(message, NULL);
2415 }
2416
2417 static int method_can_reboot_to_firmware_setup(
2418                 sd_bus_message *message,
2419                 void *userdata,
2420                 sd_bus_error *error) {
2421
2422 #if 0 /// elogind does not support EFI
2423         int r;
2424         bool challenge;
2425         const char *result;
2426         Manager *m = userdata;
2427
2428         assert(message);
2429         assert(m);
2430
2431         r = efi_reboot_to_firmware_supported();
2432         if (r == -EOPNOTSUPP)
2433                 return sd_bus_reply_method_return(message, "s", "na");
2434         else if (r < 0)
2435                 return r;
2436
2437         r = bus_test_polkit(message,
2438                             CAP_SYS_ADMIN,
2439                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2440                             NULL,
2441                             UID_INVALID,
2442                             &challenge,
2443                             error);
2444         if (r < 0)
2445                 return r;
2446
2447         if (r > 0)
2448                 result = "yes";
2449         else if (challenge)
2450                 result = "challenge";
2451         else
2452                 result = "no";
2453
2454         return sd_bus_reply_method_return(message, "s", result);
2455 #else
2456         return sd_bus_reply_method_return(message, "s", "no");
2457 #endif // 0
2458 }
2459
2460 static int method_set_wall_message(
2461                 sd_bus_message *message,
2462                 void *userdata,
2463                 sd_bus_error *error) {
2464
2465         int r;
2466         Manager *m = userdata;
2467         char *wall_message;
2468         int enable_wall_messages;
2469
2470         assert(message);
2471         assert(m);
2472
2473         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2474         if (r < 0)
2475                 return r;
2476
2477         r = bus_verify_polkit_async(message,
2478                                     CAP_SYS_ADMIN,
2479                                     "org.freedesktop.login1.set-wall-message",
2480                                     NULL,
2481                                     false,
2482                                     UID_INVALID,
2483                                     &m->polkit_registry,
2484                                     error);
2485         if (r < 0)
2486                 return r;
2487         if (r == 0)
2488                 return 1; /* Will call us back */
2489
2490         if (isempty(wall_message))
2491                 m->wall_message = mfree(m->wall_message);
2492         else {
2493                 r = free_and_strdup(&m->wall_message, wall_message);
2494                 if (r < 0)
2495                         return log_oom();
2496         }
2497
2498         m->enable_wall_messages = enable_wall_messages;
2499
2500         return sd_bus_reply_method_return(message, NULL);
2501 }
2502
2503 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2504         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2505         const char *who, *why, *what, *mode;
2506         _cleanup_free_ char *id = NULL;
2507         _cleanup_close_ int fifo_fd = -1;
2508         Manager *m = userdata;
2509         Inhibitor *i = NULL;
2510         InhibitMode mm;
2511         InhibitWhat w;
2512         pid_t pid;
2513         uid_t uid;
2514         int r;
2515
2516         assert(message);
2517         assert(m);
2518
2519         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2520         if (r < 0)
2521                 return r;
2522
2523         w = inhibit_what_from_string(what);
2524         if (w <= 0)
2525                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2526
2527         mm = inhibit_mode_from_string(mode);
2528         if (mm < 0)
2529                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2530
2531         /* Delay is only supported for shutdown/sleep */
2532         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2533                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2534
2535         /* Don't allow taking delay locks while we are already
2536          * executing the operation. We shouldn't create the impression
2537          * that the lock was successful if the machine is about to go
2538          * down/suspend any moment. */
2539         if (m->action_what & w)
2540                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2541
2542         r = bus_verify_polkit_async(
2543                         message,
2544                         CAP_SYS_BOOT,
2545                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2546                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2547                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2548                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2549                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2550                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2551                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2552                         NULL,
2553                         false,
2554                         UID_INVALID,
2555                         &m->polkit_registry,
2556                         error);
2557         if (r < 0)
2558                 return r;
2559         if (r == 0)
2560                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2561
2562         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2563         if (r < 0)
2564                 return r;
2565
2566         r = sd_bus_creds_get_euid(creds, &uid);
2567         if (r < 0)
2568                 return r;
2569
2570         r = sd_bus_creds_get_pid(creds, &pid);
2571         if (r < 0)
2572                 return r;
2573
2574         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2575                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2576
2577         do {
2578                 id = mfree(id);
2579
2580                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2581                         return -ENOMEM;
2582
2583         } while (hashmap_get(m->inhibitors, id));
2584
2585         r = manager_add_inhibitor(m, id, &i);
2586         if (r < 0)
2587                 return r;
2588
2589         i->what = w;
2590         i->mode = mm;
2591         i->pid = pid;
2592         i->uid = uid;
2593         i->why = strdup(why);
2594         i->who = strdup(who);
2595
2596         if (!i->why || !i->who) {
2597                 r = -ENOMEM;
2598                 goto fail;
2599         }
2600
2601         fifo_fd = inhibitor_create_fifo(i);
2602         if (fifo_fd < 0) {
2603                 r = fifo_fd;
2604                 goto fail;
2605         }
2606
2607         inhibitor_start(i);
2608
2609         return sd_bus_reply_method_return(message, "h", fifo_fd);
2610
2611 fail:
2612         if (i)
2613                 inhibitor_free(i);
2614
2615         return r;
2616 }
2617
2618 const sd_bus_vtable manager_vtable[] = {
2619         SD_BUS_VTABLE_START(0),
2620
2621         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2622         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2623
2624 //        SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2625         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2626         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2627         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2628         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2629         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2630         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2631         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2632         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2633         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2634         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2635         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2636         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2637         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2638         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2639         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2640         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2641         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2642         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2643         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2644         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2645         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2646         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2647         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2648         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2649         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2650         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2651         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2652         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2653         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2654
2655         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2656         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2657         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2658         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2659         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2660         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2661         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2662         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2663         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2664         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2665         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2666         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2667         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2668         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2669         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2670         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2671         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2672         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2673         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2674         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2675         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2676         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2677         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2678         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2679         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2680         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2681         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2682         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2683         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2684         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2685         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2689         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2690         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2691         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2692         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2693         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2694         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2695         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2696
2697         SD_BUS_SIGNAL("SessionNew", "so", 0),
2698         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2699         SD_BUS_SIGNAL("UserNew", "uo", 0),
2700         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2701         SD_BUS_SIGNAL("SeatNew", "so", 0),
2702         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2703         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2704         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2705
2706         SD_BUS_VTABLE_END
2707 };
2708
2709 #if 0 /// UNNEEDED by elogind
2710 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2711         int r = 0;
2712
2713         assert(s);
2714         assert(unit);
2715
2716         if (!s->started)
2717                 return r;
2718
2719         if (streq(result, "done"))
2720                 r = session_send_create_reply(s, NULL);
2721         else {
2722                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2723
2724                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2725                 r = session_send_create_reply(s, &e);
2726         }
2727
2728         return r;
2729 }
2730
2731 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2732         const char *path, *result, *unit;
2733         Manager *m = userdata;
2734         Session *session;
2735         uint32_t id;
2736         User *user;
2737         int r;
2738
2739         assert(message);
2740         assert(m);
2741
2742         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2743         if (r < 0) {
2744                 bus_log_parse_error(r);
2745                 return 0;
2746         }
2747
2748         if (m->action_job && streq(m->action_job, path)) {
2749                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2750
2751                 /* Tell people that they now may take a lock again */
2752                 send_prepare_for(m, m->action_what, false);
2753
2754                 m->action_job = mfree(m->action_job);
2755                 m->action_unit = NULL;
2756                 m->action_what = 0;
2757                 return 0;
2758         }
2759
2760         session = hashmap_get(m->session_units, unit);
2761         if (session && streq_ptr(path, session->scope_job)) {
2762                 session->scope_job = mfree(session->scope_job);
2763                 session_jobs_reply(session, unit, result);
2764
2765                 session_save(session);
2766                 user_save(session->user);
2767                 session_add_to_gc_queue(session);
2768         }
2769
2770         user = hashmap_get(m->user_units, unit);
2771         if (user &&
2772             (streq_ptr(path, user->service_job) ||
2773              streq_ptr(path, user->slice_job))) {
2774
2775                 if (streq_ptr(path, user->service_job))
2776                         user->service_job = mfree(user->service_job);
2777
2778                 if (streq_ptr(path, user->slice_job))
2779                         user->slice_job = mfree(user->slice_job);
2780
2781                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2782                         session_jobs_reply(session, unit, result);
2783
2784                 user_save(user);
2785                 user_add_to_gc_queue(user);
2786         }
2787
2788         return 0;
2789 }
2790
2791 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2792         const char *path, *unit;
2793         Manager *m = userdata;
2794         Session *session;
2795         User *user;
2796         int r;
2797
2798         assert(message);
2799         assert(m);
2800
2801         r = sd_bus_message_read(message, "so", &unit, &path);
2802         if (r < 0) {
2803                 bus_log_parse_error(r);
2804                 return 0;
2805         }
2806
2807         session = hashmap_get(m->session_units, unit);
2808         if (session)
2809                 session_add_to_gc_queue(session);
2810
2811         user = hashmap_get(m->user_units, unit);
2812         if (user)
2813                 user_add_to_gc_queue(user);
2814
2815         return 0;
2816 }
2817
2818 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2819         _cleanup_free_ char *unit = NULL;
2820         Manager *m = userdata;
2821         const char *path;
2822         Session *session;
2823         User *user;
2824         int r;
2825
2826         assert(message);
2827         assert(m);
2828
2829         path = sd_bus_message_get_path(message);
2830         if (!path)
2831                 return 0;
2832
2833         r = unit_name_from_dbus_path(path, &unit);
2834         if (r == -EINVAL) /* not a unit */
2835                 return 0;
2836         if (r < 0) {
2837                 log_oom();
2838                 return 0;
2839         }
2840
2841         session = hashmap_get(m->session_units, unit);
2842         if (session)
2843                 session_add_to_gc_queue(session);
2844
2845         user = hashmap_get(m->user_units, unit);
2846         if (user)
2847                 user_add_to_gc_queue(user);
2848
2849         return 0;
2850 }
2851
2852 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2853         Manager *m = userdata;
2854         Session *session;
2855         Iterator i;
2856         int b, r;
2857
2858         assert(message);
2859         assert(m);
2860
2861         r = sd_bus_message_read(message, "b", &b);
2862         if (r < 0) {
2863                 bus_log_parse_error(r);
2864                 return 0;
2865         }
2866
2867         if (b)
2868                 return 0;
2869
2870         /* systemd finished reloading, let's recheck all our sessions */
2871         log_debug("System manager has been reloaded, rechecking sessions...");
2872
2873         HASHMAP_FOREACH(session, m->sessions, i)
2874                 session_add_to_gc_queue(session);
2875
2876         return 0;
2877 }
2878 #endif // 0
2879
2880 int manager_send_changed(Manager *manager, const char *property, ...) {
2881         char **l;
2882
2883         assert(manager);
2884
2885         l = strv_from_stdarg_alloca(property);
2886
2887         return sd_bus_emit_properties_changed_strv(
2888                         manager->bus,
2889                         "/org/freedesktop/login1",
2890                         "org.freedesktop.login1.Manager",
2891                         l);
2892 }
2893
2894 #if 0 /// UNNEEDED by elogind
2895 static int strdup_job(sd_bus_message *reply, char **job) {
2896         const char *j;
2897         char *copy;
2898         int r;
2899
2900         r = sd_bus_message_read(reply, "o", &j);
2901         if (r < 0)
2902                 return r;
2903
2904         copy = strdup(j);
2905         if (!copy)
2906                 return -ENOMEM;
2907
2908         *job = copy;
2909         return 1;
2910 }
2911
2912 int manager_start_slice(
2913                 Manager *manager,
2914                 const char *slice,
2915                 const char *description,
2916                 const char *after,
2917                 const char *after2,
2918                 uint64_t tasks_max,
2919                 sd_bus_error *error,
2920                 char **job) {
2921
2922         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2923         int r;
2924
2925         assert(manager);
2926         assert(slice);
2927
2928         r = sd_bus_message_new_method_call(
2929                         manager->bus,
2930                         &m,
2931                         "org.freedesktop.systemd1",
2932                         "/org/freedesktop/systemd1",
2933                         "org.freedesktop.systemd1.Manager",
2934                         "StartTransientUnit");
2935         if (r < 0)
2936                 return r;
2937
2938         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2939         if (r < 0)
2940                 return r;
2941
2942         r = sd_bus_message_open_container(m, 'a', "(sv)");
2943         if (r < 0)
2944                 return r;
2945
2946         if (!isempty(description)) {
2947                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2948                 if (r < 0)
2949                         return r;
2950         }
2951
2952         if (!isempty(after)) {
2953                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2954                 if (r < 0)
2955                         return r;
2956         }
2957
2958         if (!isempty(after2)) {
2959                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2960                 if (r < 0)
2961                         return r;
2962         }
2963
2964         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
2965         if (r < 0)
2966                 return r;
2967
2968         r = sd_bus_message_close_container(m);
2969         if (r < 0)
2970                 return r;
2971
2972         r = sd_bus_message_append(m, "a(sa(sv))", 0);
2973         if (r < 0)
2974                 return r;
2975
2976         r = sd_bus_call(manager->bus, m, 0, error, &reply);
2977         if (r < 0)
2978                 return r;
2979
2980         if (job)
2981                 return strdup_job(reply, job);
2982         return 1;
2983 }
2984
2985 int manager_start_scope(
2986                 Manager *manager,
2987                 const char *scope,
2988                 pid_t pid,
2989                 const char *slice,
2990                 const char *description,
2991                 const char *after,
2992                 const char *after2,
2993                 uint64_t tasks_max,
2994                 sd_bus_error *error,
2995                 char **job) {
2996
2997         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2998         int r;
2999
3000         assert(manager);
3001         assert(scope);
3002         assert(pid > 1);
3003
3004         r = sd_bus_message_new_method_call(
3005                         manager->bus,
3006                         &m,
3007                         "org.freedesktop.systemd1",
3008                         "/org/freedesktop/systemd1",
3009                         "org.freedesktop.systemd1.Manager",
3010                         "StartTransientUnit");
3011         if (r < 0)
3012                 return r;
3013
3014         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3015         if (r < 0)
3016                 return r;
3017
3018         r = sd_bus_message_open_container(m, 'a', "(sv)");
3019         if (r < 0)
3020                 return r;
3021
3022         if (!isempty(slice)) {
3023                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3024                 if (r < 0)
3025                         return r;
3026         }
3027
3028         if (!isempty(description)) {
3029                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3030                 if (r < 0)
3031                         return r;
3032         }
3033
3034         if (!isempty(after)) {
3035                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3036                 if (r < 0)
3037                         return r;
3038         }
3039
3040         if (!isempty(after2)) {
3041                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3042                 if (r < 0)
3043                         return r;
3044         }
3045
3046         /* cgroup empty notification is not available in containers
3047          * currently. To make this less problematic, let's shorten the
3048          * stop timeout for sessions, so that we don't wait
3049          * forever. */
3050
3051         /* Make sure that the session shells are terminated with
3052          * SIGHUP since bash and friends tend to ignore SIGTERM */
3053         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3054         if (r < 0)
3055                 return r;
3056
3057         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3058         if (r < 0)
3059                 return r;
3060
3061         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3062         if (r < 0)
3063                 return r;
3064
3065         r = sd_bus_message_close_container(m);
3066         if (r < 0)
3067                 return r;
3068
3069         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3070         if (r < 0)
3071                 return r;
3072
3073         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3074         if (r < 0)
3075                 return r;
3076
3077         if (job)
3078                 return strdup_job(reply, job);
3079         return 1;
3080 }
3081
3082 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3083         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3084         int r;
3085
3086         assert(manager);
3087         assert(unit);
3088
3089         r = sd_bus_call_method(
3090                         manager->bus,
3091                         "org.freedesktop.systemd1",
3092                         "/org/freedesktop/systemd1",
3093                         "org.freedesktop.systemd1.Manager",
3094                         "StartUnit",
3095                         error,
3096                         &reply,
3097                         "ss", unit, "replace");
3098         if (r < 0)
3099                 return r;
3100
3101         if (job)
3102                 return strdup_job(reply, job);
3103         return 1;
3104 }
3105
3106 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3107         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3108         int r;
3109
3110         assert(manager);
3111         assert(unit);
3112
3113         r = sd_bus_call_method(
3114                         manager->bus,
3115                         "org.freedesktop.systemd1",
3116                         "/org/freedesktop/systemd1",
3117                         "org.freedesktop.systemd1.Manager",
3118                         "StopUnit",
3119                         error,
3120                         &reply,
3121                         "ss", unit, "fail");
3122         if (r < 0) {
3123                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3124                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3125
3126                         if (job)
3127                                 *job = NULL;
3128
3129                         sd_bus_error_free(error);
3130                         return 0;
3131                 }
3132
3133                 return r;
3134         }
3135
3136         if (job)
3137                 return strdup_job(reply, job);
3138         return 1;
3139 }
3140
3141 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3142         _cleanup_free_ char *path = NULL;
3143         int r;
3144
3145         assert(manager);
3146         assert(scope);
3147
3148         path = unit_dbus_path_from_name(scope);
3149         if (!path)
3150                 return -ENOMEM;
3151
3152         r = sd_bus_call_method(
3153                         manager->bus,
3154                         "org.freedesktop.systemd1",
3155                         path,
3156                         "org.freedesktop.systemd1.Scope",
3157                         "Abandon",
3158                         error,
3159                         NULL,
3160                         NULL);
3161         if (r < 0) {
3162                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3163                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3164                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3165                         sd_bus_error_free(error);
3166                         return 0;
3167                 }
3168
3169                 return r;
3170         }
3171
3172         return 1;
3173 }
3174
3175 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3176         assert(manager);
3177         assert(unit);
3178
3179         return sd_bus_call_method(
3180                         manager->bus,
3181                         "org.freedesktop.systemd1",
3182                         "/org/freedesktop/systemd1",
3183                         "org.freedesktop.systemd1.Manager",
3184                         "KillUnit",
3185                         error,
3186                         NULL,
3187                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3188 }
3189
3190 int manager_unit_is_active(Manager *manager, const char *unit) {
3191         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3192         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3193         _cleanup_free_ char *path = NULL;
3194         const char *state;
3195         int r;
3196
3197         assert(manager);
3198         assert(unit);
3199
3200         path = unit_dbus_path_from_name(unit);
3201         if (!path)
3202                 return -ENOMEM;
3203
3204         r = sd_bus_get_property(
3205                         manager->bus,
3206                         "org.freedesktop.systemd1",
3207                         path,
3208                         "org.freedesktop.systemd1.Unit",
3209                         "ActiveState",
3210                         &error,
3211                         &reply,
3212                         "s");
3213         if (r < 0) {
3214                 /* systemd might have droppped off momentarily, let's
3215                  * not make this an error */
3216                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3217                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3218                         return true;
3219
3220                 /* If the unit is already unloaded then it's not
3221                  * active */
3222                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3223                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3224                         return false;
3225
3226                 return r;
3227         }
3228
3229         r = sd_bus_message_read(reply, "s", &state);
3230         if (r < 0)
3231                 return -EINVAL;
3232
3233         return !streq(state, "inactive") && !streq(state, "failed");
3234 }
3235
3236 int manager_job_is_active(Manager *manager, const char *path) {
3237         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3238         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3239         int r;
3240
3241         assert(manager);
3242         assert(path);
3243
3244         r = sd_bus_get_property(
3245                         manager->bus,
3246                         "org.freedesktop.systemd1",
3247                         path,
3248                         "org.freedesktop.systemd1.Job",
3249                         "State",
3250                         &error,
3251                         &reply,
3252                         "s");
3253         if (r < 0) {
3254                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3255                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3256                         return true;
3257
3258                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3259                         return false;
3260
3261                 return r;
3262         }
3263
3264         /* We don't actually care about the state really. The fact
3265          * that we could read the job state is enough for us */
3266
3267         return true;
3268 }
3269 #endif // 0