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 #if 1 /// elogind needs this prototype
  57 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active);
  58 #endif // 1
  59
  60 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  61         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  62         Session *session;
  63         int r;
  64
  65         assert(m);
  66         assert(message);
  67         assert(ret);
  68
  69         if (isempty(name)) {
  70                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  71                 if (r < 0)
  72                         return r;
  73
  74                 r = sd_bus_creds_get_session(creds, &name);
  75                 if (r < 0)
  76                         return r;
  77         }
  78
  79         session = hashmap_get(m->sessions, name);
  80         if (!session)
  81                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  82
  83         *ret = session;
  84         return 0;
  85 }
  86
  87 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
  88         User *user;
  89         int r;
  90
  91         assert(m);
  92         assert(message);
  93         assert(ret);
  94
  95         if (uid == UID_INVALID) {
  96                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  97
  98                 /* Note that we get the owner UID of the session, not the actual client UID here! */
  99                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 100                 if (r < 0)
 101                         return r;
 102
 103                 r = sd_bus_creds_get_owner_uid(creds, &uid);
 104                 if (r < 0)
 105                         return r;
 106         }
 107
 108         user = hashmap_get(m->users, UID_TO_PTR(uid));
 109         if (!user)
 110                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid);
 111
 112         *ret = user;
 113         return 0;
 114 }
 115
 116 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 117         Seat *seat;
 118         int r;
 119
 120         assert(m);
 121         assert(message);
 122         assert(ret);
 123
 124         if (isempty(name)) {
 125                 Session *session;
 126
 127                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 128                 if (r < 0)
 129                         return r;
 130
 131                 seat = session->seat;
 132                 if (!seat)
 133                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 134         } else {
 135                 seat = hashmap_get(m->seats, name);
 136                 if (!seat)
 137                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 138         }
 139
 140         *ret = seat;
 141         return 0;
 142 }
 143
 144 static int property_get_idle_hint(
 145                 sd_bus *bus,
 146                 const char *path,
 147                 const char *interface,
 148                 const char *property,
 149                 sd_bus_message *reply,
 150                 void *userdata,
 151                 sd_bus_error *error) {
 152
 153         Manager *m = userdata;
 154
 155         assert(bus);
 156         assert(reply);
 157         assert(m);
 158
 159         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 160 }
 161
 162 static int property_get_idle_since_hint(
 163                 sd_bus *bus,
 164                 const char *path,
 165                 const char *interface,
 166                 const char *property,
 167                 sd_bus_message *reply,
 168                 void *userdata,
 169                 sd_bus_error *error) {
 170
 171         Manager *m = userdata;
 172         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 173
 174         assert(bus);
 175         assert(reply);
 176         assert(m);
 177
 178         manager_get_idle_hint(m, &t);
 179
 180         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 181 }
 182
 183 static int property_get_inhibited(
 184                 sd_bus *bus,
 185                 const char *path,
 186                 const char *interface,
 187                 const char *property,
 188                 sd_bus_message *reply,
 189                 void *userdata,
 190                 sd_bus_error *error) {
 191
 192         Manager *m = userdata;
 193         InhibitWhat w;
 194
 195         assert(bus);
 196         assert(reply);
 197         assert(m);
 198
 199         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 200
 201         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 202 }
 203
 204 static int property_get_preparing(
 205                 sd_bus *bus,
 206                 const char *path,
 207                 const char *interface,
 208                 const char *property,
 209                 sd_bus_message *reply,
 210                 void *userdata,
 211                 sd_bus_error *error) {
 212
 213         Manager *m = userdata;
 214         bool b;
 215
 216         assert(bus);
 217         assert(reply);
 218         assert(m);
 219
 220         if (streq(property, "PreparingForShutdown"))
 221                 b = !!(m->action_what & INHIBIT_SHUTDOWN);
 222         else
 223                 b = !!(m->action_what & INHIBIT_SLEEP);
 224
 225         return sd_bus_message_append(reply, "b", b);
 226 }
 227
 228 static int property_get_scheduled_shutdown(
 229                 sd_bus *bus,
 230                 const char *path,
 231                 const char *interface,
 232                 const char *property,
 233                 sd_bus_message *reply,
 234                 void *userdata,
 235                 sd_bus_error *error) {
 236
 237         Manager *m = userdata;
 238         int r;
 239
 240         assert(bus);
 241         assert(reply);
 242         assert(m);
 243
 244         r = sd_bus_message_open_container(reply, 'r', "st");
 245         if (r < 0)
 246                 return r;
 247
 248         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 249         if (r < 0)
 250                 return r;
 251
 252         return sd_bus_message_close_container(reply);
 253 }
 254
 255 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 256
 257 static int property_get_docked(
 258                 sd_bus *bus,
 259                 const char *path,
 260                 const char *interface,
 261                 const char *property,
 262                 sd_bus_message *reply,
 263                 void *userdata,
 264                 sd_bus_error *error) {
 265
 266         Manager *m = userdata;
 267
 268         assert(bus);
 269         assert(reply);
 270         assert(m);
 271
 272         return sd_bus_message_append(reply, "b", manager_is_docked_or_external_displays(m));
 273 }
 274
 275 static int property_get_current_sessions(
 276                 sd_bus *bus,
 277                 const char *path,
 278                 const char *interface,
 279                 const char *property,
 280                 sd_bus_message *reply,
 281                 void *userdata,
 282                 sd_bus_error *error) {
 283
 284         Manager *m = userdata;
 285
 286         assert(bus);
 287         assert(reply);
 288         assert(m);
 289
 290         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->sessions));
 291 }
 292
 293 static int property_get_current_inhibitors(
 294                 sd_bus *bus,
 295                 const char *path,
 296                 const char *interface,
 297                 const char *property,
 298                 sd_bus_message *reply,
 299                 void *userdata,
 300                 sd_bus_error *error) {
 301
 302         Manager *m = userdata;
 303
 304         assert(bus);
 305         assert(reply);
 306         assert(m);
 307
 308         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->inhibitors));
 309 }
 310
 311 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 312         _cleanup_free_ char *p = NULL;
 313         Manager *m = userdata;
 314         const char *name;
 315         Session *session;
 316         int r;
 317
 318         assert(message);
 319         assert(m);
 320
 321         r = sd_bus_message_read(message, "s", &name);
 322         if (r < 0)
 323                 return r;
 324
 325         r = manager_get_session_from_creds(m, message, name, error, &session);
 326         if (r < 0)
 327                 return r;
 328
 329         p = session_bus_path(session);
 330         if (!p)
 331                 return -ENOMEM;
 332
 333         return sd_bus_reply_method_return(message, "o", p);
 334 }
 335
 336 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 337         _cleanup_free_ char *p = NULL;
 338         Session *session = NULL;
 339         Manager *m = userdata;
 340         pid_t pid;
 341         int r;
 342
 343         assert(message);
 344         assert(m);
 345
 346         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 347
 348         r = sd_bus_message_read(message, "u", &pid);
 349         if (r < 0)
 350                 return r;
 351         if (pid < 0)
 352                 return -EINVAL;
 353
 354         if (pid == 0) {
 355                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 356                 if (r < 0)
 357                         return r;
 358         } else {
 359                 r = manager_get_session_by_pid(m, pid, &session);
 360                 if (r < 0)
 361                         return r;
 362
 363                 if (!session)
 364                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 365         }
 366
 367         p = session_bus_path(session);
 368         if (!p)
 369                 return -ENOMEM;
 370
 371         return sd_bus_reply_method_return(message, "o", p);
 372 }
 373
 374 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 375         _cleanup_free_ char *p = NULL;
 376         Manager *m = userdata;
 377         uint32_t uid;
 378         User *user;
 379         int r;
 380
 381         assert(message);
 382         assert(m);
 383
 384         r = sd_bus_message_read(message, "u", &uid);
 385         if (r < 0)
 386                 return r;
 387
 388         r = manager_get_user_from_creds(m, message, uid, error, &user);
 389         if (r < 0)
 390                 return r;
 391
 392         p = user_bus_path(user);
 393         if (!p)
 394                 return -ENOMEM;
 395
 396         return sd_bus_reply_method_return(message, "o", p);
 397 }
 398
 399 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 400         _cleanup_free_ char *p = NULL;
 401         Manager *m = userdata;
 402         User *user = NULL;
 403         pid_t pid;
 404         int r;
 405
 406         assert(message);
 407         assert(m);
 408
 409         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 410
 411         r = sd_bus_message_read(message, "u", &pid);
 412         if (r < 0)
 413                 return r;
 414         if (pid < 0)
 415                 return -EINVAL;
 416
 417         if (pid == 0) {
 418                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 419                 if (r < 0)
 420                         return r;
 421         } else {
 422                 r = manager_get_user_by_pid(m, pid, &user);
 423                 if (r < 0)
 424                         return r;
 425                 if (!user)
 426                         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);
 427         }
 428
 429         p = user_bus_path(user);
 430         if (!p)
 431                 return -ENOMEM;
 432
 433         return sd_bus_reply_method_return(message, "o", p);
 434 }
 435
 436 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 437         _cleanup_free_ char *p = NULL;
 438         Manager *m = userdata;
 439         const char *name;
 440         Seat *seat;
 441         int r;
 442
 443         assert(message);
 444         assert(m);
 445
 446         r = sd_bus_message_read(message, "s", &name);
 447         if (r < 0)
 448                 return r;
 449
 450         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 451         if (r < 0)
 452                 return r;
 453
 454         p = seat_bus_path(seat);
 455         if (!p)
 456                 return -ENOMEM;
 457
 458         return sd_bus_reply_method_return(message, "o", p);
 459 }
 460
 461 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 462         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 463         Manager *m = userdata;
 464         Session *session;
 465         Iterator i;
 466         int r;
 467
 468         assert(message);
 469         assert(m);
 470
 471         r = sd_bus_message_new_method_return(message, &reply);
 472         if (r < 0)
 473                 return r;
 474
 475         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 476         if (r < 0)
 477                 return r;
 478
 479         HASHMAP_FOREACH(session, m->sessions, i) {
 480                 _cleanup_free_ char *p = NULL;
 481
 482                 p = session_bus_path(session);
 483                 if (!p)
 484                         return -ENOMEM;
 485
 486                 r = sd_bus_message_append(reply, "(susso)",
 487                                           session->id,
 488                                           (uint32_t) session->user->uid,
 489                                           session->user->name,
 490                                           session->seat ? session->seat->id : "",
 491                                           p);
 492                 if (r < 0)
 493                         return r;
 494         }
 495
 496         r = sd_bus_message_close_container(reply);
 497         if (r < 0)
 498                 return r;
 499
 500         return sd_bus_send(NULL, reply, NULL);
 501 }
 502
 503 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 504         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 505         Manager *m = userdata;
 506         User *user;
 507         Iterator i;
 508         int r;
 509
 510         assert(message);
 511         assert(m);
 512
 513         r = sd_bus_message_new_method_return(message, &reply);
 514         if (r < 0)
 515                 return r;
 516
 517         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 518         if (r < 0)
 519                 return r;
 520
 521         HASHMAP_FOREACH(user, m->users, i) {
 522                 _cleanup_free_ char *p = NULL;
 523
 524                 p = user_bus_path(user);
 525                 if (!p)
 526                         return -ENOMEM;
 527
 528                 r = sd_bus_message_append(reply, "(uso)",
 529                                           (uint32_t) user->uid,
 530                                           user->name,
 531                                           p);
 532                 if (r < 0)
 533                         return r;
 534         }
 535
 536         r = sd_bus_message_close_container(reply);
 537         if (r < 0)
 538                 return r;
 539
 540         return sd_bus_send(NULL, reply, NULL);
 541 }
 542
 543 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 544         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 545         Manager *m = userdata;
 546         Seat *seat;
 547         Iterator i;
 548         int r;
 549
 550         assert(message);
 551         assert(m);
 552
 553         r = sd_bus_message_new_method_return(message, &reply);
 554         if (r < 0)
 555                 return r;
 556
 557         r = sd_bus_message_open_container(reply, 'a', "(so)");
 558         if (r < 0)
 559                 return r;
 560
 561         HASHMAP_FOREACH(seat, m->seats, i) {
 562                 _cleanup_free_ char *p = NULL;
 563
 564                 p = seat_bus_path(seat);
 565                 if (!p)
 566                         return -ENOMEM;
 567
 568                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 569                 if (r < 0)
 570                         return r;
 571         }
 572
 573         r = sd_bus_message_close_container(reply);
 574         if (r < 0)
 575                 return r;
 576
 577         return sd_bus_send(NULL, reply, NULL);
 578 }
 579
 580 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 581         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 582         Manager *m = userdata;
 583         Inhibitor *inhibitor;
 584         Iterator i;
 585         int r;
 586
 587         assert(message);
 588         assert(m);
 589
 590         r = sd_bus_message_new_method_return(message, &reply);
 591         if (r < 0)
 592                 return r;
 593
 594         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 595         if (r < 0)
 596                 return r;
 597
 598         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 599
 600                 r = sd_bus_message_append(reply, "(ssssuu)",
 601                                           strempty(inhibit_what_to_string(inhibitor->what)),
 602                                           strempty(inhibitor->who),
 603                                           strempty(inhibitor->why),
 604                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 605                                           (uint32_t) inhibitor->uid,
 606                                           (uint32_t) inhibitor->pid);
 607                 if (r < 0)
 608                         return r;
 609         }
 610
 611         r = sd_bus_message_close_container(reply);
 612         if (r < 0)
 613                 return r;
 614
 615         return sd_bus_send(NULL, reply, NULL);
 616 }
 617
 618 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 619         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 620         uint32_t audit_id = 0;
 621         _cleanup_free_ char *id = NULL;
 622         Session *session = NULL;
 623         Manager *m = userdata;
 624         User *user = NULL;
 625         Seat *seat = NULL;
 626         pid_t leader;
 627         uid_t uid;
 628         int remote;
 629         uint32_t vtnr = 0;
 630         SessionType t;
 631         SessionClass c;
 632         int r;
 633
 634         assert(message);
 635         assert(m);
 636
 637         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 638         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 639
 640         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 641         if (r < 0)
 642                 return r;
 643
 644         if (!uid_is_valid(uid))
 645                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 646         if (leader < 0 || leader == 1)
 647                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 648
 649         if (isempty(type))
 650                 t = _SESSION_TYPE_INVALID;
 651         else {
 652                 t = session_type_from_string(type);
 653                 if (t < 0)
 654                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 655         }
 656
 657         if (isempty(class))
 658                 c = _SESSION_CLASS_INVALID;
 659         else {
 660                 c = session_class_from_string(class);
 661                 if (c < 0)
 662                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 663         }
 664
 665         if (isempty(desktop))
 666                 desktop = NULL;
 667         else {
 668                 if (!string_is_safe(desktop))
 669                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 670         }
 671
 672         if (isempty(cseat))
 673                 seat = NULL;
 674         else {
 675                 seat = hashmap_get(m->seats, cseat);
 676                 if (!seat)
 677                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 678         }
 679
 680         if (tty_is_vc(tty)) {
 681                 int v;
 682
 683                 if (!seat)
 684                         seat = m->seat0;
 685                 else if (seat != m->seat0)
 686                         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);
 687
 688                 v = vtnr_from_tty(tty);
 689                 if (v <= 0)
 690                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 691
 692                 if (!vtnr)
 693                         vtnr = (uint32_t) v;
 694                 else if (vtnr != (uint32_t) v)
 695                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 696
 697         } else if (tty_is_console(tty)) {
 698
 699                 if (!seat)
 700                         seat = m->seat0;
 701                 else if (seat != m->seat0)
 702                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 703
 704                 if (vtnr != 0)
 705                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 706         }
 707
 708         if (seat) {
 709                 if (seat_has_vts(seat)) {
 710                         if (!vtnr || vtnr > 63)
 711                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 712                 } else {
 713                         if (vtnr != 0)
 714                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 715                 }
 716         }
 717
 718         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 719         if (r < 0)
 720                 return r;
 721
 722         if (t == _SESSION_TYPE_INVALID) {
 723                 if (!isempty(display))
 724                         t = SESSION_X11;
 725                 else if (!isempty(tty))
 726                         t = SESSION_TTY;
 727                 else
 728                         t = SESSION_UNSPECIFIED;
 729         }
 730
 731         if (c == _SESSION_CLASS_INVALID) {
 732                 if (t == SESSION_UNSPECIFIED)
 733                         c = SESSION_BACKGROUND;
 734                 else
 735                         c = SESSION_USER;
 736         }
 737
 738         if (leader == 0) {
 739                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 740
 741                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 742                 if (r < 0)
 743                         return r;
 744
 745                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 746                 if (r < 0)
 747                         return r;
 748         }
 749
 750         r = manager_get_session_by_pid(m, leader, NULL);
 751         if (r > 0)
 752                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session");
 753
 754         /*
 755          * Old gdm and lightdm start the user-session on the same VT as
 756          * the greeter session. But they destroy the greeter session
 757          * after the user-session and want the user-session to take
 758          * over the VT. We need to support this for
 759          * backwards-compatibility, so make sure we allow new sessions
 760          * on a VT that a greeter is running on. Furthermore, to allow
 761          * re-logins, we have to allow a greeter to take over a used VT for
 762          * the exact same reasons.
 763          */
 764         if (c != SESSION_GREETER &&
 765             vtnr > 0 &&
 766             vtnr < m->seat0->position_count &&
 767             m->seat0->positions[vtnr] &&
 768             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 769                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 770
 771         if (hashmap_size(m->sessions) >= m->sessions_max)
 772                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 773
 774         audit_session_from_pid(leader, &audit_id);
 775         if (audit_id > 0) {
 776                 /* Keep our session IDs and the audit session IDs in sync */
 777
 778                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 779                         return -ENOMEM;
 780
 781                 /* Wut? There's already a session by this name and we
 782                  * didn't find it above? Weird, then let's not trust
 783                  * the audit data and let's better register a new
 784                  * ID */
 785                 if (hashmap_get(m->sessions, id)) {
 786                         log_warning("Existing logind session ID %s used by new audit session, ignoring", id);
 787                         audit_id = 0;
 788
 789                         id = mfree(id);
 790                 }
 791         }
 792
 793         if (!id) {
 794                 do {
 795                         id = mfree(id);
 796
 797                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 798                                 return -ENOMEM;
 799
 800                 } while (hashmap_get(m->sessions, id));
 801         }
 802
 803         r = manager_add_user_by_uid(m, uid, &user);
 804         if (r < 0)
 805                 goto fail;
 806
 807         r = manager_add_session(m, id, &session);
 808         if (r < 0)
 809                 goto fail;
 810
 811         session_set_user(session, user);
 812
 813         session->leader = leader;
 814         session->audit_id = audit_id;
 815         session->type = t;
 816         session->class = c;
 817         session->remote = remote;
 818         session->vtnr = vtnr;
 819
 820         if (!isempty(tty)) {
 821                 session->tty = strdup(tty);
 822                 if (!session->tty) {
 823                         r = -ENOMEM;
 824                         goto fail;
 825                 }
 826         }
 827
 828         if (!isempty(display)) {
 829                 session->display = strdup(display);
 830                 if (!session->display) {
 831                         r = -ENOMEM;
 832                         goto fail;
 833                 }
 834         }
 835
 836         if (!isempty(remote_user)) {
 837                 session->remote_user = strdup(remote_user);
 838                 if (!session->remote_user) {
 839                         r = -ENOMEM;
 840                         goto fail;
 841                 }
 842         }
 843
 844         if (!isempty(remote_host)) {
 845                 session->remote_host = strdup(remote_host);
 846                 if (!session->remote_host) {
 847                         r = -ENOMEM;
 848                         goto fail;
 849                 }
 850         }
 851
 852         if (!isempty(service)) {
 853                 session->service = strdup(service);
 854                 if (!session->service) {
 855                         r = -ENOMEM;
 856                         goto fail;
 857                 }
 858         }
 859
 860         if (!isempty(desktop)) {
 861                 session->desktop = strdup(desktop);
 862                 if (!session->desktop) {
 863                         r = -ENOMEM;
 864                         goto fail;
 865                 }
 866         }
 867
 868         if (seat) {
 869                 r = seat_attach_session(seat, session);
 870                 if (r < 0)
 871                         goto fail;
 872         }
 873
 874         r = session_start(session);
 875         if (r < 0)
 876                 goto fail;
 877
 878         session->create_message = sd_bus_message_ref(message);
 879
 880 #if 0 /// UNNEEDED by elogind
 881         /* Now, let's wait until the slice unit and stuff got
 882          * created. We send the reply back from
 883          * session_send_create_reply(). */
 884 #else
 885         /* We reply directly. */
 886
 887         r = session_send_create_reply(session, NULL);
 888         if (r < 0)
 889                 goto fail;
 890 #endif // 0
 891
 892         return 1;
 893
 894 fail:
 895         if (session)
 896                 session_add_to_gc_queue(session);
 897
 898         if (user)
 899                 user_add_to_gc_queue(user);
 900
 901         return r;
 902 }
 903
 904 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 905         Manager *m = userdata;
 906         Session *session;
 907         const char *name;
 908         int r;
 909
 910         assert(message);
 911         assert(m);
 912
 913         r = sd_bus_message_read(message, "s", &name);
 914         if (r < 0)
 915                 return r;
 916
 917         r = manager_get_session_from_creds(m, message, name, error, &session);
 918         if (r < 0)
 919                 return r;
 920
 921         r = session_release(session);
 922         if (r < 0)
 923                 return r;
 924
 925 #if 1 /// elogind must queue this session
 926         session_add_to_gc_queue(session);
 927 #endif // 1
 928
 929         return sd_bus_reply_method_return(message, NULL);
 930 }
 931
 932 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 933         Manager *m = userdata;
 934         Session *session;
 935         const char *name;
 936         int r;
 937
 938         assert(message);
 939         assert(m);
 940
 941         r = sd_bus_message_read(message, "s", &name);
 942         if (r < 0)
 943                 return r;
 944
 945         r = manager_get_session_from_creds(m, message, name, error, &session);
 946         if (r < 0)
 947                 return r;
 948
 949         return bus_session_method_activate(message, session, error);
 950 }
 951
 952 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 953         const char *session_name, *seat_name;
 954         Manager *m = userdata;
 955         Session *session;
 956         Seat *seat;
 957         int r;
 958
 959         assert(message);
 960         assert(m);
 961
 962         /* Same as ActivateSession() but refuses to work if
 963          * the seat doesn't match */
 964
 965         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 966         if (r < 0)
 967                 return r;
 968
 969         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 970         if (r < 0)
 971                 return r;
 972
 973         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 974         if (r < 0)
 975                 return r;
 976
 977         if (session->seat != seat)
 978                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 979
 980         r = session_activate(session);
 981         if (r < 0)
 982                 return r;
 983
 984         return sd_bus_reply_method_return(message, NULL);
 985 }
 986
 987 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 988         Manager *m = userdata;
 989         Session *session;
 990         const char *name;
 991         int r;
 992
 993         assert(message);
 994         assert(m);
 995
 996         r = sd_bus_message_read(message, "s", &name);
 997         if (r < 0)
 998                 return r;
 999
1000         r = manager_get_session_from_creds(m, message, name, error, &session);
1001         if (r < 0)
1002                 return r;
1003
1004         return bus_session_method_lock(message, session, error);
1005 }
1006
1007 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1008         Manager *m = userdata;
1009         int r;
1010
1011         assert(message);
1012         assert(m);
1013
1014         r = bus_verify_polkit_async(
1015                         message,
1016                         CAP_SYS_ADMIN,
1017                         "org.freedesktop.login1.lock-sessions",
1018                         NULL,
1019                         false,
1020                         UID_INVALID,
1021                         &m->polkit_registry,
1022                         error);
1023         if (r < 0)
1024                 return r;
1025         if (r == 0)
1026                 return 1; /* Will call us back */
1027
1028         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1029         if (r < 0)
1030                 return r;
1031
1032         return sd_bus_reply_method_return(message, NULL);
1033 }
1034
1035 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1036         const char *name;
1037         Manager *m = userdata;
1038         Session *session;
1039         int r;
1040
1041         assert(message);
1042         assert(m);
1043
1044         r = sd_bus_message_read(message, "s", &name);
1045         if (r < 0)
1046                 return r;
1047
1048         r = manager_get_session_from_creds(m, message, name, error, &session);
1049         if (r < 0)
1050                 return r;
1051
1052         return bus_session_method_kill(message, session, error);
1053 }
1054
1055 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1056         Manager *m = userdata;
1057         uint32_t uid;
1058         User *user;
1059         int r;
1060
1061         assert(message);
1062         assert(m);
1063
1064         r = sd_bus_message_read(message, "u", &uid);
1065         if (r < 0)
1066                 return r;
1067
1068         r = manager_get_user_from_creds(m, message, uid, error, &user);
1069         if (r < 0)
1070                 return r;
1071
1072         return bus_user_method_kill(message, user, error);
1073 }
1074
1075 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1076         Manager *m = userdata;
1077         const char *name;
1078         Session *session;
1079         int r;
1080
1081         assert(message);
1082         assert(m);
1083
1084         r = sd_bus_message_read(message, "s", &name);
1085         if (r < 0)
1086                 return r;
1087
1088         r = manager_get_session_from_creds(m, message, name, error, &session);
1089         if (r < 0)
1090                 return r;
1091
1092         return bus_session_method_terminate(message, session, error);
1093 }
1094
1095 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1096         Manager *m = userdata;
1097         uint32_t uid;
1098         User *user;
1099         int r;
1100
1101         assert(message);
1102         assert(m);
1103
1104         r = sd_bus_message_read(message, "u", &uid);
1105         if (r < 0)
1106                 return r;
1107
1108         r = manager_get_user_from_creds(m, message, uid, error, &user);
1109         if (r < 0)
1110                 return r;
1111
1112         return bus_user_method_terminate(message, user, error);
1113 }
1114
1115 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1116         Manager *m = userdata;
1117         const char *name;
1118         Seat *seat;
1119         int r;
1120
1121         assert(message);
1122         assert(m);
1123
1124         r = sd_bus_message_read(message, "s", &name);
1125         if (r < 0)
1126                 return r;
1127
1128         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1129         if (r < 0)
1130                 return r;
1131
1132         return bus_seat_method_terminate(message, seat, error);
1133 }
1134
1135 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1136         _cleanup_free_ char *cc = NULL;
1137         Manager *m = userdata;
1138         int r, b, interactive;
1139         struct passwd *pw;
1140         const char *path;
1141         uint32_t uid;
1142         bool self = false;
1143
1144         assert(message);
1145         assert(m);
1146
1147         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1148         if (r < 0)
1149                 return r;
1150
1151         if (uid == UID_INVALID) {
1152                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1153
1154                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1155                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1156                 if (r < 0)
1157                         return r;
1158
1159                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1160                 if (r < 0)
1161                         return r;
1162
1163                 self = true;
1164
1165         } else if (!uid_is_valid(uid))
1166                 return -EINVAL;
1167
1168         errno = 0;
1169         pw = getpwuid(uid);
1170         if (!pw)
1171                 return errno > 0 ? -errno : -ENOENT;
1172
1173         r = bus_verify_polkit_async(
1174                         message,
1175                         CAP_SYS_ADMIN,
1176                         self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger",
1177                         NULL,
1178                         interactive,
1179                         UID_INVALID,
1180                         &m->polkit_registry,
1181                         error);
1182         if (r < 0)
1183                 return r;
1184         if (r == 0)
1185                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1186
1187         mkdir_p_label("/var/lib/systemd", 0755);
1188
1189         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1190         if (r < 0)
1191                 return r;
1192
1193         cc = cescape(pw->pw_name);
1194         if (!cc)
1195                 return -ENOMEM;
1196
1197         path = strjoina("/var/lib/systemd/linger/", cc);
1198         if (b) {
1199                 User *u;
1200
1201                 r = touch(path);
1202                 if (r < 0)
1203                         return r;
1204
1205                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1206                         user_start(u);
1207
1208         } else {
1209                 User *u;
1210
1211                 r = unlink(path);
1212                 if (r < 0 && errno != ENOENT)
1213                         return -errno;
1214
1215                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1216                 if (u)
1217                         user_add_to_gc_queue(u);
1218         }
1219
1220         return sd_bus_reply_method_return(message, NULL);
1221 }
1222
1223 static int trigger_device(Manager *m, struct udev_device *d) {
1224         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1225         struct udev_list_entry *first, *item;
1226         int r;
1227
1228         assert(m);
1229
1230         e = udev_enumerate_new(m->udev);
1231         if (!e)
1232                 return -ENOMEM;
1233
1234         if (d) {
1235                 r = udev_enumerate_add_match_parent(e, d);
1236                 if (r < 0)
1237                         return r;
1238         }
1239
1240         r = udev_enumerate_scan_devices(e);
1241         if (r < 0)
1242                 return r;
1243
1244         first = udev_enumerate_get_list_entry(e);
1245         udev_list_entry_foreach(item, first) {
1246                 _cleanup_free_ char *t = NULL;
1247                 const char *p;
1248
1249                 p = udev_list_entry_get_name(item);
1250
1251                 t = strappend(p, "/uevent");
1252                 if (!t)
1253                         return -ENOMEM;
1254
1255                 write_string_file(t, "change", WRITE_STRING_FILE_CREATE);
1256         }
1257
1258         return 0;
1259 }
1260
1261 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1262         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1263         _cleanup_free_ char *rule = NULL, *file = NULL;
1264         const char *id_for_seat;
1265         int r;
1266
1267         assert(m);
1268         assert(seat);
1269         assert(sysfs);
1270
1271         d = udev_device_new_from_syspath(m->udev, sysfs);
1272         if (!d)
1273                 return -ENODEV;
1274
1275         if (!udev_device_has_tag(d, "seat"))
1276                 return -ENODEV;
1277
1278         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1279         if (!id_for_seat)
1280                 return -ENODEV;
1281
1282         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1283                 return -ENOMEM;
1284
1285         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1286                 return -ENOMEM;
1287
1288         mkdir_p_label("/etc/udev/rules.d", 0755);
1289         r = write_string_file_atomic_label(file, rule);
1290         if (r < 0)
1291                 return r;
1292
1293         return trigger_device(m, d);
1294 }
1295
1296 static int flush_devices(Manager *m) {
1297         _cleanup_closedir_ DIR *d;
1298
1299         assert(m);
1300
1301         d = opendir("/etc/udev/rules.d");
1302         if (!d) {
1303                 if (errno != ENOENT)
1304                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1305         } else {
1306                 struct dirent *de;
1307
1308                 while ((de = readdir(d))) {
1309
1310                         if (!dirent_is_file(de))
1311                                 continue;
1312
1313                         if (!startswith(de->d_name, "72-seat-"))
1314                                 continue;
1315
1316                         if (!endswith(de->d_name, ".rules"))
1317                                 continue;
1318
1319                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1320                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1321                 }
1322         }
1323
1324         return trigger_device(m, NULL);
1325 }
1326
1327 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1328         const char *sysfs, *seat;
1329         Manager *m = userdata;
1330         int interactive, r;
1331
1332         assert(message);
1333         assert(m);
1334
1335         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1336         if (r < 0)
1337                 return r;
1338
1339         if (!path_startswith(sysfs, "/sys"))
1340                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1341
1342         if (!seat_name_is_valid(seat))
1343                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1344
1345         r = bus_verify_polkit_async(
1346                         message,
1347                         CAP_SYS_ADMIN,
1348                         "org.freedesktop.login1.attach-device",
1349                         NULL,
1350                         interactive,
1351                         UID_INVALID,
1352                         &m->polkit_registry,
1353                         error);
1354         if (r < 0)
1355                 return r;
1356         if (r == 0)
1357                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1358
1359         r = attach_device(m, seat, sysfs);
1360         if (r < 0)
1361                 return r;
1362
1363         return sd_bus_reply_method_return(message, NULL);
1364 }
1365
1366 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1367         Manager *m = userdata;
1368         int interactive, r;
1369
1370         assert(message);
1371         assert(m);
1372
1373         r = sd_bus_message_read(message, "b", &interactive);
1374         if (r < 0)
1375                 return r;
1376
1377         r = bus_verify_polkit_async(
1378                         message,
1379                         CAP_SYS_ADMIN,
1380                         "org.freedesktop.login1.flush-devices",
1381                         NULL,
1382                         interactive,
1383                         UID_INVALID,
1384                         &m->polkit_registry,
1385                         error);
1386         if (r < 0)
1387                 return r;
1388         if (r == 0)
1389                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1390
1391         r = flush_devices(m);
1392         if (r < 0)
1393                 return r;
1394
1395         return sd_bus_reply_method_return(message, NULL);
1396 }
1397
1398 static int have_multiple_sessions(
1399                 Manager *m,
1400                 uid_t uid) {
1401
1402         Session *session;
1403         Iterator i;
1404
1405         assert(m);
1406
1407         /* Check for other users' sessions. Greeter sessions do not
1408          * count, and non-login sessions do not count either. */
1409         HASHMAP_FOREACH(session, m->sessions, i)
1410                 if (session->class == SESSION_USER &&
1411                     session->user->uid != uid)
1412                         return true;
1413
1414         return false;
1415 }
1416
1417 static int bus_manager_log_shutdown(
1418                 Manager *m,
1419                 InhibitWhat w,
1420 #if 0 /// elogind does not support systemd units
1421                 const char *unit_name) {
1422
1423         const char *p, *q;
1424
1425         assert(m);
1426         assert(unit_name);
1427
1428         if (w != INHIBIT_SHUTDOWN)
1429                 return 0;
1430
1431         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1432                 p = "MESSAGE=System is powering down";
1433                 q = "SHUTDOWN=power-off";
1434         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1435                 p = "MESSAGE=System is halting";
1436                 q = "SHUTDOWN=halt";
1437         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1438                 p = "MESSAGE=System is rebooting";
1439                 q = "SHUTDOWN=reboot";
1440         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1441                 p = "MESSAGE=System is rebooting with kexec";
1442                 q = "SHUTDOWN=kexec";
1443         } else {
1444                 p = "MESSAGE=System is shutting down";
1445                 q = NULL;
1446         }
1447 #else
1448                  HandleAction action) {
1449
1450          const char *p, *q;
1451
1452          assert(m);
1453
1454          if (w != INHIBIT_SHUTDOWN)
1455                  return 0;
1456
1457          switch (action) {
1458          case HANDLE_POWEROFF:
1459                  p = "MESSAGE=System is powering down.";
1460                  q = "SHUTDOWN=power-off";
1461                  break;
1462          case HANDLE_HALT:
1463                  p = "MESSAGE=System is halting.";
1464                  q = "SHUTDOWN=halt";
1465                  break;
1466          case HANDLE_REBOOT:
1467                  p = "MESSAGE=System is rebooting.";
1468                  q = "SHUTDOWN=reboot";
1469                  break;
1470          case HANDLE_KEXEC:
1471                  p = "MESSAGE=System is rebooting with kexec.";
1472                  q = "SHUTDOWN=kexec";
1473                  break;
1474          default:
1475                  p = "MESSAGE=System is shutting down.";
1476                  q = NULL;
1477          }
1478 #endif // 0
1479         if (isempty(m->wall_message))
1480                 p = strjoina(p, ".");
1481         else
1482                 p = strjoina(p, " (", m->wall_message, ").");
1483
1484         return log_struct(LOG_NOTICE,
1485                           LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
1486                           p,
1487                           q,
1488                           NULL);
1489 }
1490
1491 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1492         Manager *m = userdata;
1493
1494         assert(e);
1495         assert(m);
1496
1497         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1498         return 0;
1499 }
1500
1501 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1502         int r;
1503
1504         assert(m);
1505
1506         if (until <= now(CLOCK_MONOTONIC))
1507                 return 0;
1508
1509         /* We want to ignore the lid switch for a while after each
1510          * suspend, and after boot-up. Hence let's install a timer for
1511          * this. As long as the event source exists we ignore the lid
1512          * switch. */
1513
1514         if (m->lid_switch_ignore_event_source) {
1515                 usec_t u;
1516
1517                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1518                 if (r < 0)
1519                         return r;
1520
1521                 if (until <= u)
1522                         return 0;
1523
1524                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1525         } else
1526                 r = sd_event_add_time(
1527                                 m->event,
1528                                 &m->lid_switch_ignore_event_source,
1529                                 CLOCK_MONOTONIC,
1530                                 until, 0,
1531                                 lid_switch_ignore_handler, m);
1532
1533         return r;
1534 }
1535
1536 static void reset_scheduled_shutdown(Manager *m) {
1537         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1538         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1539         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1540         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1541         m->scheduled_shutdown_timeout = 0;
1542         m->shutdown_dry_run = false;
1543
1544         if (m->unlink_nologin) {
1545                 (void) unlink("/run/nologin");
1546                 m->unlink_nologin = false;
1547         }
1548 }
1549
1550 static int execute_shutdown_or_sleep(
1551                 Manager *m,
1552                 InhibitWhat w,
1553                 HandleAction action,
1554                 sd_bus_error *error) {
1555
1556 #if 0 /// elogind does not need these, we do it ourselves
1557         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1558         char *c = NULL;
1559         const char *p;
1560 #else
1561         /* needed for update-utmp */
1562         char** argv_utmp = NULL;
1563 #endif // 0
1564         int r;
1565
1566         assert(m);
1567         assert(w >= 0);
1568         assert(w < _INHIBIT_WHAT_MAX);
1569
1570         bus_manager_log_shutdown(m, w, action);
1571
1572 #if 0 /// elogind does it directly without depending on systemd running the system
1573         if (m->shutdown_dry_run) {
1574                 log_info("Running in dry run, suppressing action.");
1575                 reset_scheduled_shutdown(m);
1576         } else {
1577                 r = sd_bus_call_method(
1578                                 m->bus,
1579                                 "org.freedesktop.systemd1",
1580                                 "/org/freedesktop/systemd1",
1581                                 "org.freedesktop.systemd1.Manager",
1582                                 "StartUnit",
1583                                 error,
1584                                 &reply,
1585                                 "ss", unit_name, "replace-irreversibly");
1586                 if (r < 0)
1587                         return r;
1588
1589                 r = sd_bus_message_read(reply, "o", &p);
1590                 if (r < 0)
1591                         return r;
1592
1593                 c = strdup(p);
1594                 if (!c)
1595                         return -ENOMEM;
1596
1597                 m->action_unit = unit_name;
1598                 free(m->action_job);
1599                 m->action_job = c;
1600                 m->action_what = w;
1601         }
1602 #else
1603         if (IN_SET(action, HANDLE_HALT, HANDLE_POWEROFF, HANDLE_REBOOT)) {
1604
1605                 /* As we have no systemd update-utmp daemon running, we have to
1606                  * set the relevant utmp/wtmp entries ourselves.
1607                  */
1608
1609                 if (strv_extend(&argv_utmp, "elogind") < 0)
1610                         return log_oom();
1611
1612                 if (HANDLE_REBOOT == action) {
1613                         if (strv_extend(&argv_utmp, "reboot") < 0)
1614                                 return log_oom();
1615                 } else {
1616                         if (strv_extend(&argv_utmp, "shutdown") < 0)
1617                                 return log_oom();
1618                 }
1619
1620                  /* This comes from our patched update-utmp/update-utmp.c */
1621                 update_utmp(2, argv_utmp, m->bus);
1622                 strv_free(argv_utmp);
1623         }
1624
1625         /* Now perform the requested action */
1626         r = shutdown_or_sleep(m, action);
1627
1628         /* no more pending actions, whether this failed or not */
1629         m->pending_action = HANDLE_IGNORE;
1630
1631         /* As elogind can not rely on a systemd manager to call all
1632          * sleeping processes to wake up, we have to tell them all
1633          * by ourselves. */
1634         if (w == INHIBIT_SLEEP) {
1635                 send_prepare_for(m, w, false);
1636                 m->action_what = 0;
1637         } else
1638                 m->action_what = w;
1639
1640         if (r < 0)
1641                 return r;
1642 #endif // 0
1643
1644         /* Make sure the lid switch is ignored for a while */
1645         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1646
1647         return 0;
1648 }
1649
1650 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1651
1652         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1653         Inhibitor *offending = NULL;
1654         int r;
1655
1656         assert(manager);
1657
1658         if ( (0 == manager->action_what) || (HANDLE_IGNORE == manager->pending_action) )
1659                 return 0;
1660
1661         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1662                 _cleanup_free_ char *comm = NULL, *u = NULL;
1663
1664                 if (!timeout)
1665                         return 0;
1666
1667                 (void) get_process_comm(offending->pid, &comm);
1668                 u = uid_to_name(offending->uid);
1669
1670                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1671                            offending->uid, strna(u),
1672                            offending->pid, strna(comm));
1673         }
1674
1675         /* Actually do the operation */
1676         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->pending_action, &error);
1677         if (r < 0) {
1678                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1679
1680                 manager->pending_action = HANDLE_IGNORE;
1681                 manager->action_what    = 0;
1682 #if 0 /// It is not a critical error for elogind if suspending fails
1683                 return r;
1684 #endif // 0
1685         }
1686
1687         return 1;
1688 }
1689
1690 static int manager_inhibit_timeout_handler(
1691                         sd_event_source *s,
1692                         uint64_t usec,
1693                         void *userdata) {
1694
1695         Manager *manager = userdata;
1696         int r;
1697
1698         assert(manager);
1699         assert(manager->inhibit_timeout_source == s);
1700
1701         r = manager_dispatch_delayed(manager, true);
1702         return (r < 0) ? r : 0;
1703 }
1704
1705 static int delay_shutdown_or_sleep(
1706                 Manager *m,
1707                 InhibitWhat w,
1708                 HandleAction action) {
1709
1710         int r;
1711         usec_t timeout_val;
1712
1713         assert(m);
1714         assert(w >= 0);
1715         assert(w < _INHIBIT_WHAT_MAX);
1716
1717         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1718
1719         if (m->inhibit_timeout_source) {
1720                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1721                 if (r < 0)
1722                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1723
1724                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1725                 if (r < 0)
1726                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1727         } else {
1728                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1729                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1730                 if (r < 0)
1731                         return r;
1732         }
1733
1734         m->pending_action = action;
1735         m->action_what = w;
1736
1737         return 0;
1738 }
1739
1740 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1741
1742         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1743                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1744                 [INHIBIT_SLEEP] = "PrepareForSleep"
1745         };
1746
1747         int active = _active;
1748
1749         assert(m);
1750         assert(w >= 0);
1751         assert(w < _INHIBIT_WHAT_MAX);
1752         assert(signal_name[w]);
1753
1754         return sd_bus_emit_signal(m->bus,
1755                                   "/org/freedesktop/login1",
1756                                   "org.freedesktop.login1.Manager",
1757                                   signal_name[w],
1758                                   "b",
1759                                   active);
1760 }
1761
1762 int bus_manager_shutdown_or_sleep_now_or_later(
1763                 Manager *m,
1764                 HandleAction action,
1765                 InhibitWhat w,
1766                 sd_bus_error *error) {
1767
1768         bool delayed;
1769         int r;
1770
1771         assert(m);
1772         assert(w >= 0);
1773         assert(w <= _INHIBIT_WHAT_MAX);
1774
1775         /* Tell everybody to prepare for shutdown/sleep */
1776         send_prepare_for(m, w, true);
1777
1778         delayed =
1779                 m->inhibit_delay_max > 0 &&
1780                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1781
1782         log_debug_elogind("%s called for %s (%sdelayed)", __FUNCTION__,
1783                           handle_action_to_string(action),
1784                           delayed ? "" : "NOT ");
1785
1786         if (delayed)
1787                 /* Shutdown is delayed, keep in mind what we
1788                  * want to do, and start a timeout */
1789                 r = delay_shutdown_or_sleep(m, w, action);
1790         else
1791                 /* Shutdown is not delayed, execute it
1792                  * immediately */
1793                 r = execute_shutdown_or_sleep(m, w, action, error);
1794
1795         return r;
1796 }
1797
1798 static int verify_shutdown_creds(
1799                 Manager *m,
1800                 sd_bus_message *message,
1801                 InhibitWhat w,
1802                 bool interactive,
1803                 const char *action,
1804                 const char *action_multiple_sessions,
1805                 const char *action_ignore_inhibit,
1806                 sd_bus_error *error) {
1807
1808         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1809         bool multiple_sessions, blocked;
1810         uid_t uid;
1811         int r;
1812
1813         assert(m);
1814         assert(message);
1815         assert(w >= 0);
1816         assert(w <= _INHIBIT_WHAT_MAX);
1817
1818         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1819         if (r < 0)
1820                 return r;
1821
1822         r = sd_bus_creds_get_euid(creds, &uid);
1823         if (r < 0)
1824                 return r;
1825
1826         r = have_multiple_sessions(m, uid);
1827         if (r < 0)
1828                 return r;
1829
1830         multiple_sessions = r > 0;
1831         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1832
1833         if (multiple_sessions && action_multiple_sessions) {
1834                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1835                 if (r < 0)
1836                         return r;
1837                 if (r == 0)
1838                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1839         }
1840
1841         if (blocked && action_ignore_inhibit) {
1842                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1843                 if (r < 0)
1844                         return r;
1845                 if (r == 0)
1846                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1847         }
1848
1849         if (!multiple_sessions && !blocked && action) {
1850                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1851                 if (r < 0)
1852                         return r;
1853                 if (r == 0)
1854                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1855         }
1856
1857         return 0;
1858 }
1859
1860 static int method_do_shutdown_or_sleep(
1861                 Manager *m,
1862                 sd_bus_message *message,
1863                 HandleAction sleep_action,
1864                 InhibitWhat w,
1865                 const char *action,
1866                 const char *action_multiple_sessions,
1867                 const char *action_ignore_inhibit,
1868                 const char *sleep_verb,
1869                 sd_bus_error *error) {
1870
1871         int interactive, r;
1872
1873         assert(m);
1874         assert(message);
1875         assert(w >= 0);
1876         assert(w <= _INHIBIT_WHAT_MAX);
1877
1878         r = sd_bus_message_read(message, "b", &interactive);
1879         if (r < 0)
1880                 return r;
1881
1882         log_debug_elogind("%s called with action '%s', sleep '%s' (%sinteractive)",
1883                           __FUNCTION__, action, sleep_verb,
1884                           interactive ? "" : "NOT ");
1885
1886         /* Don't allow multiple jobs being executed at the same time */
1887         if (m->action_what)
1888                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1889
1890         if (sleep_verb) {
1891                 r = can_sleep(m, sleep_verb);
1892                 if (r < 0)
1893                         return r;
1894
1895                 if (r == 0)
1896                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1897         }
1898
1899         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1900                                   action_ignore_inhibit, error);
1901         log_debug_elogind("verify_shutdown_creds() returned %d", r);
1902         if (r != 0)
1903                 return r;
1904
1905         r = bus_manager_shutdown_or_sleep_now_or_later(m, sleep_action, w, error);
1906         if (r < 0)
1907                 return r;
1908
1909         return sd_bus_reply_method_return(message, NULL);
1910 }
1911
1912 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1913         Manager *m = userdata;
1914
1915         log_debug_elogind("%s called", __FUNCTION__);
1916
1917         return method_do_shutdown_or_sleep(
1918                         m, message,
1919                         HANDLE_POWEROFF,
1920                         INHIBIT_SHUTDOWN,
1921                         "org.freedesktop.login1.power-off",
1922                         "org.freedesktop.login1.power-off-multiple-sessions",
1923                         "org.freedesktop.login1.power-off-ignore-inhibit",
1924                         NULL,
1925                         error);
1926 }
1927
1928 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1929         Manager *m = userdata;
1930
1931         log_debug_elogind("%s called", __FUNCTION__);
1932
1933         return method_do_shutdown_or_sleep(
1934                         m, message,
1935                         HANDLE_REBOOT,
1936                         INHIBIT_SHUTDOWN,
1937                         "org.freedesktop.login1.reboot",
1938                         "org.freedesktop.login1.reboot-multiple-sessions",
1939                         "org.freedesktop.login1.reboot-ignore-inhibit",
1940                         NULL,
1941                         error);
1942 }
1943
1944 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1945         Manager *m = userdata;
1946
1947         log_debug_elogind("%s called", __FUNCTION__);
1948
1949         return method_do_shutdown_or_sleep(
1950                         m, message,
1951                         HANDLE_SUSPEND,
1952                         INHIBIT_SLEEP,
1953                         "org.freedesktop.login1.suspend",
1954                         "org.freedesktop.login1.suspend-multiple-sessions",
1955                         "org.freedesktop.login1.suspend-ignore-inhibit",
1956                         "suspend",
1957                         error);
1958 }
1959
1960 static int nologin_timeout_handler(
1961                         sd_event_source *s,
1962                         uint64_t usec,
1963                         void *userdata) {
1964
1965         Manager *m = userdata;
1966         int r;
1967
1968         log_info("Creating /run/nologin, blocking further logins...");
1969
1970         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1971         if (r < 0)
1972                 log_error_errno(r, "Failed to create /run/nologin: %m");
1973         else
1974                 m->unlink_nologin = true;
1975
1976         return 0;
1977 }
1978
1979 static int update_schedule_file(Manager *m) {
1980         _cleanup_free_ char *temp_path = NULL;
1981         _cleanup_fclose_ FILE *f = NULL;
1982         int r;
1983
1984         assert(m);
1985
1986         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1987         if (r < 0)
1988                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1989
1990         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1991         if (r < 0)
1992                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1993
1994         (void) fchmod(fileno(f), 0644);
1995
1996         fprintf(f,
1997                 "USEC="USEC_FMT"\n"
1998                 "WARN_WALL=%i\n"
1999                 "MODE=%s\n",
2000                 m->scheduled_shutdown_timeout,
2001                 m->enable_wall_messages,
2002                 m->scheduled_shutdown_type);
2003
2004         if (!isempty(m->wall_message)) {
2005                 _cleanup_free_ char *t;
2006
2007                 t = cescape(m->wall_message);
2008                 if (!t) {
2009                         r = -ENOMEM;
2010                         goto fail;
2011                 }
2012
2013                 fprintf(f, "WALL_MESSAGE=%s\n", t);
2014         }
2015
2016         r = fflush_and_check(f);
2017         if (r < 0)
2018                 goto fail;
2019
2020         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2021                 r = -errno;
2022                 goto fail;
2023         }
2024
2025         return 0;
2026
2027 fail:
2028         (void) unlink(temp_path);
2029         (void) unlink("/run/systemd/shutdown/scheduled");
2030
2031         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2032 }
2033
2034 static int manager_scheduled_shutdown_handler(
2035                         sd_event_source *s,
2036                         uint64_t usec,
2037                         void *userdata) {
2038
2039         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2040         Manager *m = userdata;
2041         HandleAction action;
2042         int r;
2043
2044         assert(m);
2045
2046         if (isempty(m->scheduled_shutdown_type))
2047                 return 0;
2048
2049         if (streq(m->scheduled_shutdown_type, "halt"))
2050                 action = HANDLE_HALT;
2051         else if (streq(m->scheduled_shutdown_type, "poweroff"))
2052                 action = HANDLE_POWEROFF;
2053         else
2054                 action = HANDLE_REBOOT;
2055
2056         r = execute_shutdown_or_sleep(m, 0, action, &error);
2057         if (r < 0)
2058                 return log_error_errno(r, "Unable to execute transition to %s: %m", m->scheduled_shutdown_type);
2059
2060         return 0;
2061 }
2062
2063 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2064         Manager *m = userdata;
2065         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2066         const char *action_multiple_sessions = NULL;
2067         const char *action_ignore_inhibit = NULL;
2068         const char *action = NULL;
2069         uint64_t elapse;
2070         char *type;
2071         int r;
2072
2073         assert(m);
2074         assert(message);
2075
2076         log_debug_elogind("%s called", __FUNCTION__);
2077
2078         r = sd_bus_message_read(message, "st", &type, &elapse);
2079         if (r < 0)
2080                 return r;
2081
2082         if (startswith(type, "dry-")) {
2083                 type += 4;
2084                 m->shutdown_dry_run = true;
2085         }
2086
2087         if (streq(type, "reboot")) {
2088                 action = "org.freedesktop.login1.reboot";
2089                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2090                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2091         } else if (streq(type, "halt")) {
2092                 action = "org.freedesktop.login1.halt";
2093                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2094                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2095         } else if (streq(type, "poweroff")) {
2096                 action = "org.freedesktop.login1.power-off";
2097                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2098                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2099         } else
2100                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2101
2102         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2103                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2104         if (r != 0)
2105                 return r;
2106
2107         if (m->scheduled_shutdown_timeout_source) {
2108                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2109                 if (r < 0)
2110                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2111
2112                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2113                 if (r < 0)
2114                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2115         } else {
2116                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2117                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2118                 if (r < 0)
2119                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2120         }
2121
2122         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2123         if (r < 0) {
2124                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2125                 return log_oom();
2126         }
2127
2128         if (m->nologin_timeout_source) {
2129                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2130                 if (r < 0)
2131                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2132
2133                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2134                 if (r < 0)
2135                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2136         } else {
2137                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2138                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2139                 if (r < 0)
2140                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2141         }
2142
2143         m->scheduled_shutdown_timeout = elapse;
2144
2145         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2146         if (r >= 0) {
2147                 const char *tty = NULL;
2148
2149                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2150                 (void) sd_bus_creds_get_tty(creds, &tty);
2151
2152                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2153                 if (r < 0) {
2154                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2155                         return log_oom();
2156                 }
2157         }
2158
2159         r = manager_setup_wall_message_timer(m);
2160         if (r < 0)
2161                 return r;
2162
2163         if (!isempty(type)) {
2164                 r = update_schedule_file(m);
2165                 if (r < 0)
2166                         return r;
2167         } else
2168                 (void) unlink("/run/systemd/shutdown/scheduled");
2169
2170         return sd_bus_reply_method_return(message, NULL);
2171 }
2172
2173 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2174         Manager *m = userdata;
2175         bool cancelled;
2176 #if 1 /// elogind needs to construct the message to allow extra wall messages
2177         _cleanup_free_ char *l = NULL;
2178 #endif // 1
2179
2180         assert(m);
2181         assert(message);
2182
2183         log_debug_elogind("%s called", __FUNCTION__);
2184
2185         cancelled = m->scheduled_shutdown_type != NULL;
2186         reset_scheduled_shutdown(m);
2187
2188         if (cancelled) {
2189                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2190                 const char *tty = NULL;
2191                 uid_t uid = 0;
2192                 int r;
2193
2194                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2195                 if (r >= 0) {
2196                         (void) sd_bus_creds_get_uid(creds, &uid);
2197                         (void) sd_bus_creds_get_tty(creds, &tty);
2198                 }
2199
2200 #if 0 /// elogind wants to allow extra cancellation messages
2201                 utmp_wall("The system shutdown has been cancelled",
2202                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2203 #else
2204                 r = asprintf(&l, "%s%sThe system shutdown has been cancelled!",
2205                              strempty(m->wall_message),
2206                              isempty(m->wall_message) ? "" : "\n");
2207                 if (r < 0) {
2208                         log_oom();
2209                         return 0;
2210                 }
2211
2212                 utmp_wall(l, uid_to_name(uid), tty, logind_wall_tty_filter, m);
2213 #endif // 0
2214         }
2215
2216         return sd_bus_reply_method_return(message, "b", cancelled);
2217 }
2218
2219 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2220         Manager *m = userdata;
2221
2222         log_debug_elogind("%s called", __FUNCTION__);
2223
2224         return method_do_shutdown_or_sleep(
2225                         m, message,
2226                         HANDLE_HIBERNATE,
2227                         INHIBIT_SLEEP,
2228                         "org.freedesktop.login1.hibernate",
2229                         "org.freedesktop.login1.hibernate-multiple-sessions",
2230                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2231                         "hibernate",
2232                         error);
2233 }
2234
2235 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2236         Manager *m = userdata;
2237
2238         log_debug_elogind("%s called", __FUNCTION__);
2239
2240         return method_do_shutdown_or_sleep(
2241                         m, message,
2242                         HANDLE_HYBRID_SLEEP,
2243                         INHIBIT_SLEEP,
2244                         "org.freedesktop.login1.hibernate",
2245                         "org.freedesktop.login1.hibernate-multiple-sessions",
2246                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2247                         "hybrid-sleep",
2248                         error);
2249 }
2250
2251 static int method_can_shutdown_or_sleep(
2252                 Manager *m,
2253                 sd_bus_message *message,
2254                 InhibitWhat w,
2255                 const char *action,
2256                 const char *action_multiple_sessions,
2257                 const char *action_ignore_inhibit,
2258                 const char *sleep_verb,
2259                 sd_bus_error *error) {
2260
2261         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2262         bool multiple_sessions, challenge, blocked;
2263         const char *result = NULL;
2264         uid_t uid;
2265         int r;
2266
2267         assert(m);
2268         assert(message);
2269         assert(w >= 0);
2270         assert(w <= _INHIBIT_WHAT_MAX);
2271         assert(action);
2272         assert(action_multiple_sessions);
2273         assert(action_ignore_inhibit);
2274
2275         if (sleep_verb) {
2276                 r = can_sleep(m, sleep_verb);
2277                 if (r < 0)
2278                         return r;
2279                 if (r == 0)
2280                         return sd_bus_reply_method_return(message, "s", "na");
2281         }
2282
2283         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2284         if (r < 0)
2285                 return r;
2286
2287         r = sd_bus_creds_get_euid(creds, &uid);
2288         if (r < 0)
2289                 return r;
2290
2291         r = have_multiple_sessions(m, uid);
2292         if (r < 0)
2293                 return r;
2294
2295         multiple_sessions = r > 0;
2296         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2297
2298         if (multiple_sessions) {
2299                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2300                 if (r < 0)
2301                         return r;
2302
2303                 if (r > 0)
2304                         result = "yes";
2305                 else if (challenge)
2306                         result = "challenge";
2307                 else
2308                         result = "no";
2309         }
2310
2311         if (blocked) {
2312                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2313                 if (r < 0)
2314                         return r;
2315
2316                 if (r > 0 && !result)
2317                         result = "yes";
2318                 else if (challenge && (!result || streq(result, "yes")))
2319                         result = "challenge";
2320                 else
2321                         result = "no";
2322         }
2323
2324         if (!multiple_sessions && !blocked) {
2325                 /* If neither inhibit nor multiple sessions
2326                  * apply then just check the normal policy */
2327
2328                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2329                 if (r < 0)
2330                         return r;
2331
2332                 if (r > 0)
2333                         result = "yes";
2334                 else if (challenge)
2335                         result = "challenge";
2336                 else
2337                         result = "no";
2338         }
2339
2340         return sd_bus_reply_method_return(message, "s", result);
2341 }
2342
2343 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2344         Manager *m = userdata;
2345
2346         return method_can_shutdown_or_sleep(
2347                         m, message,
2348                         INHIBIT_SHUTDOWN,
2349                         "org.freedesktop.login1.power-off",
2350                         "org.freedesktop.login1.power-off-multiple-sessions",
2351                         "org.freedesktop.login1.power-off-ignore-inhibit",
2352                         NULL,
2353                         error);
2354 }
2355
2356 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2357         Manager *m = userdata;
2358
2359         return method_can_shutdown_or_sleep(
2360                         m, message,
2361                         INHIBIT_SHUTDOWN,
2362                         "org.freedesktop.login1.reboot",
2363                         "org.freedesktop.login1.reboot-multiple-sessions",
2364                         "org.freedesktop.login1.reboot-ignore-inhibit",
2365                         NULL,
2366                         error);
2367 }
2368
2369 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2370         Manager *m = userdata;
2371
2372         return method_can_shutdown_or_sleep(
2373                         m, message,
2374                         INHIBIT_SLEEP,
2375                         "org.freedesktop.login1.suspend",
2376                         "org.freedesktop.login1.suspend-multiple-sessions",
2377                         "org.freedesktop.login1.suspend-ignore-inhibit",
2378                         "suspend",
2379                         error);
2380 }
2381
2382 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2383         Manager *m = userdata;
2384
2385         return method_can_shutdown_or_sleep(
2386                         m, message,
2387                         INHIBIT_SLEEP,
2388                         "org.freedesktop.login1.hibernate",
2389                         "org.freedesktop.login1.hibernate-multiple-sessions",
2390                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2391                         "hibernate",
2392                         error);
2393 }
2394
2395 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2396         Manager *m = userdata;
2397
2398         return method_can_shutdown_or_sleep(
2399                         m, message,
2400                         INHIBIT_SLEEP,
2401                         "org.freedesktop.login1.hibernate",
2402                         "org.freedesktop.login1.hibernate-multiple-sessions",
2403                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2404                         "hybrid-sleep",
2405                         error);
2406 }
2407
2408 static int property_get_reboot_to_firmware_setup(
2409                 sd_bus *bus,
2410                 const char *path,
2411                 const char *interface,
2412                 const char *property,
2413                 sd_bus_message *reply,
2414                 void *userdata,
2415                 sd_bus_error *error) {
2416 #if 0 /// elogind does not support EFI
2417         int r;
2418
2419         assert(bus);
2420         assert(reply);
2421         assert(userdata);
2422
2423         r = efi_get_reboot_to_firmware();
2424         if (r < 0 && r != -EOPNOTSUPP)
2425                 return r;
2426
2427         return sd_bus_message_append(reply, "b", r > 0);
2428 #else
2429         return sd_bus_message_append(reply, "b", false);
2430 #endif // 0
2431 }
2432
2433 static int method_set_reboot_to_firmware_setup(
2434                 sd_bus_message *message,
2435                 void *userdata,
2436                 sd_bus_error *error) {
2437
2438         int b, r;
2439         Manager *m = userdata;
2440
2441         assert(message);
2442         assert(m);
2443
2444         r = sd_bus_message_read(message, "b", &b);
2445         if (r < 0)
2446                 return r;
2447
2448         r = bus_verify_polkit_async(message,
2449                                     CAP_SYS_ADMIN,
2450                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2451                                     NULL,
2452                                     false,
2453                                     UID_INVALID,
2454                                     &m->polkit_registry,
2455                                     error);
2456         if (r < 0)
2457                 return r;
2458         if (r == 0)
2459                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2460
2461 #if 0 /// elogind does not support EFI
2462         r = efi_set_reboot_to_firmware(b);
2463         if (r < 0)
2464                 return r;
2465 #endif // 0
2466
2467         return sd_bus_reply_method_return(message, NULL);
2468 }
2469
2470 static int method_can_reboot_to_firmware_setup(
2471                 sd_bus_message *message,
2472                 void *userdata,
2473                 sd_bus_error *error) {
2474
2475 #if 0 /// elogind does not support EFI
2476         int r;
2477         bool challenge;
2478         const char *result;
2479         Manager *m = userdata;
2480
2481         assert(message);
2482         assert(m);
2483
2484         r = efi_reboot_to_firmware_supported();
2485         if (r == -EOPNOTSUPP)
2486                 return sd_bus_reply_method_return(message, "s", "na");
2487         else if (r < 0)
2488                 return r;
2489
2490         r = bus_test_polkit(message,
2491                             CAP_SYS_ADMIN,
2492                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2493                             NULL,
2494                             UID_INVALID,
2495                             &challenge,
2496                             error);
2497         if (r < 0)
2498                 return r;
2499
2500         if (r > 0)
2501                 result = "yes";
2502         else if (challenge)
2503                 result = "challenge";
2504         else
2505                 result = "no";
2506
2507         return sd_bus_reply_method_return(message, "s", result);
2508 #else
2509         return sd_bus_reply_method_return(message, "s", "no");
2510 #endif // 0
2511 }
2512
2513 static int method_set_wall_message(
2514                 sd_bus_message *message,
2515                 void *userdata,
2516                 sd_bus_error *error) {
2517
2518         int r;
2519         Manager *m = userdata;
2520         char *wall_message;
2521         int enable_wall_messages;
2522
2523         assert(message);
2524         assert(m);
2525
2526         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2527         if (r < 0)
2528                 return r;
2529
2530         r = bus_verify_polkit_async(message,
2531                                     CAP_SYS_ADMIN,
2532                                     "org.freedesktop.login1.set-wall-message",
2533                                     NULL,
2534                                     false,
2535                                     UID_INVALID,
2536                                     &m->polkit_registry,
2537                                     error);
2538         if (r < 0)
2539                 return r;
2540         if (r == 0)
2541                 return 1; /* Will call us back */
2542
2543         if (isempty(wall_message))
2544                 m->wall_message = mfree(m->wall_message);
2545         else {
2546                 r = free_and_strdup(&m->wall_message, wall_message);
2547                 if (r < 0)
2548                         return log_oom();
2549         }
2550
2551         m->enable_wall_messages = enable_wall_messages;
2552
2553         return sd_bus_reply_method_return(message, NULL);
2554 }
2555
2556 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2557         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2558         const char *who, *why, *what, *mode;
2559         _cleanup_free_ char *id = NULL;
2560         _cleanup_close_ int fifo_fd = -1;
2561         Manager *m = userdata;
2562         Inhibitor *i = NULL;
2563         InhibitMode mm;
2564         InhibitWhat w;
2565         pid_t pid;
2566         uid_t uid;
2567         int r;
2568
2569         assert(message);
2570         assert(m);
2571
2572         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2573         if (r < 0)
2574                 return r;
2575
2576         w = inhibit_what_from_string(what);
2577         if (w <= 0)
2578                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2579
2580         mm = inhibit_mode_from_string(mode);
2581         if (mm < 0)
2582                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2583
2584         /* Delay is only supported for shutdown/sleep */
2585         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2586                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2587
2588         /* Don't allow taking delay locks while we are already
2589          * executing the operation. We shouldn't create the impression
2590          * that the lock was successful if the machine is about to go
2591          * down/suspend any moment. */
2592         if (m->action_what & w)
2593                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2594
2595         r = bus_verify_polkit_async(
2596                         message,
2597                         CAP_SYS_BOOT,
2598                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2599                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2600                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2601                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2602                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2603                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2604                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2605                         NULL,
2606                         false,
2607                         UID_INVALID,
2608                         &m->polkit_registry,
2609                         error);
2610         if (r < 0)
2611                 return r;
2612         if (r == 0)
2613                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2614
2615         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2616         if (r < 0)
2617                 return r;
2618
2619         r = sd_bus_creds_get_euid(creds, &uid);
2620         if (r < 0)
2621                 return r;
2622
2623         r = sd_bus_creds_get_pid(creds, &pid);
2624         if (r < 0)
2625                 return r;
2626
2627         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2628                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2629
2630         do {
2631                 id = mfree(id);
2632
2633                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2634                         return -ENOMEM;
2635
2636         } while (hashmap_get(m->inhibitors, id));
2637
2638         r = manager_add_inhibitor(m, id, &i);
2639         if (r < 0)
2640                 return r;
2641
2642         i->what = w;
2643         i->mode = mm;
2644         i->pid = pid;
2645         i->uid = uid;
2646         i->why = strdup(why);
2647         i->who = strdup(who);
2648
2649         if (!i->why || !i->who) {
2650                 r = -ENOMEM;
2651                 goto fail;
2652         }
2653
2654         fifo_fd = inhibitor_create_fifo(i);
2655         if (fifo_fd < 0) {
2656                 r = fifo_fd;
2657                 goto fail;
2658         }
2659
2660         inhibitor_start(i);
2661
2662         return sd_bus_reply_method_return(message, "h", fifo_fd);
2663
2664 fail:
2665         if (i)
2666                 inhibitor_free(i);
2667
2668         return r;
2669 }
2670
2671 const sd_bus_vtable manager_vtable[] = {
2672         SD_BUS_VTABLE_START(0),
2673
2674         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2675         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2676
2677 //        SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2678         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2679         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2680         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2681         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2682         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2683         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2684         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2685         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2686         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2687         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2688         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2689         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2690         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2691         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2692         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2693         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2694         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2695         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2696         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2697         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2698         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2699         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2700         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2701         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2702         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2703         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2704         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2705         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2706         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2707
2708         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2709         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2710         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2711         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2712         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2713         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2714         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2715         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2716         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2717         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2718         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2719         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2720         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2721         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2722         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2723         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2724         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2725         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2726         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2727         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2728         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2729         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2730         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2731         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2732         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2733         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2734         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2735         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2736         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2737         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2738         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2739         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2740         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2741         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2742         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2743         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2744         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2745         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2746         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2747         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2748         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2749
2750         SD_BUS_SIGNAL("SessionNew", "so", 0),
2751         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2752         SD_BUS_SIGNAL("UserNew", "uo", 0),
2753         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2754         SD_BUS_SIGNAL("SeatNew", "so", 0),
2755         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2756         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2757         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2758
2759         SD_BUS_VTABLE_END
2760 };
2761
2762 #if 0 /// UNNEEDED by elogind
2763 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2764         int r = 0;
2765
2766         assert(s);
2767         assert(unit);
2768
2769         if (!s->started)
2770                 return r;
2771
2772         if (streq(result, "done"))
2773                 r = session_send_create_reply(s, NULL);
2774         else {
2775                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2776
2777                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2778                 r = session_send_create_reply(s, &e);
2779         }
2780
2781         return r;
2782 }
2783
2784 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2785         const char *path, *result, *unit;
2786         Manager *m = userdata;
2787         Session *session;
2788         uint32_t id;
2789         User *user;
2790         int r;
2791
2792         assert(message);
2793         assert(m);
2794
2795         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2796         if (r < 0) {
2797                 bus_log_parse_error(r);
2798                 return 0;
2799         }
2800
2801         if (m->action_job && streq(m->action_job, path)) {
2802                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2803
2804                 /* Tell people that they now may take a lock again */
2805                 send_prepare_for(m, m->action_what, false);
2806
2807                 m->action_job = mfree(m->action_job);
2808                 m->action_unit = NULL;
2809                 m->action_what = 0;
2810                 return 0;
2811         }
2812
2813         session = hashmap_get(m->session_units, unit);
2814         if (session && streq_ptr(path, session->scope_job)) {
2815                 session->scope_job = mfree(session->scope_job);
2816                 session_jobs_reply(session, unit, result);
2817
2818                 session_save(session);
2819                 user_save(session->user);
2820                 session_add_to_gc_queue(session);
2821         }
2822
2823         user = hashmap_get(m->user_units, unit);
2824         if (user &&
2825             (streq_ptr(path, user->service_job) ||
2826              streq_ptr(path, user->slice_job))) {
2827
2828                 if (streq_ptr(path, user->service_job))
2829                         user->service_job = mfree(user->service_job);
2830
2831                 if (streq_ptr(path, user->slice_job))
2832                         user->slice_job = mfree(user->slice_job);
2833
2834                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2835                         session_jobs_reply(session, unit, result);
2836
2837                 user_save(user);
2838                 user_add_to_gc_queue(user);
2839         }
2840
2841         return 0;
2842 }
2843
2844 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2845         const char *path, *unit;
2846         Manager *m = userdata;
2847         Session *session;
2848         User *user;
2849         int r;
2850
2851         assert(message);
2852         assert(m);
2853
2854         r = sd_bus_message_read(message, "so", &unit, &path);
2855         if (r < 0) {
2856                 bus_log_parse_error(r);
2857                 return 0;
2858         }
2859
2860         session = hashmap_get(m->session_units, unit);
2861         if (session)
2862                 session_add_to_gc_queue(session);
2863
2864         user = hashmap_get(m->user_units, unit);
2865         if (user)
2866                 user_add_to_gc_queue(user);
2867
2868         return 0;
2869 }
2870
2871 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2872         _cleanup_free_ char *unit = NULL;
2873         Manager *m = userdata;
2874         const char *path;
2875         Session *session;
2876         User *user;
2877         int r;
2878
2879         assert(message);
2880         assert(m);
2881
2882         path = sd_bus_message_get_path(message);
2883         if (!path)
2884                 return 0;
2885
2886         r = unit_name_from_dbus_path(path, &unit);
2887         if (r == -EINVAL) /* not a unit */
2888                 return 0;
2889         if (r < 0) {
2890                 log_oom();
2891                 return 0;
2892         }
2893
2894         session = hashmap_get(m->session_units, unit);
2895         if (session)
2896                 session_add_to_gc_queue(session);
2897
2898         user = hashmap_get(m->user_units, unit);
2899         if (user)
2900                 user_add_to_gc_queue(user);
2901
2902         return 0;
2903 }
2904
2905 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2906         Manager *m = userdata;
2907         Session *session;
2908         Iterator i;
2909         int b, r;
2910
2911         assert(message);
2912         assert(m);
2913
2914         r = sd_bus_message_read(message, "b", &b);
2915         if (r < 0) {
2916                 bus_log_parse_error(r);
2917                 return 0;
2918         }
2919
2920         if (b)
2921                 return 0;
2922
2923         /* systemd finished reloading, let's recheck all our sessions */
2924         log_debug("System manager has been reloaded, rechecking sessions...");
2925
2926         HASHMAP_FOREACH(session, m->sessions, i)
2927                 session_add_to_gc_queue(session);
2928
2929         return 0;
2930 }
2931 #endif // 0
2932
2933 int manager_send_changed(Manager *manager, const char *property, ...) {
2934         char **l;
2935
2936         assert(manager);
2937
2938         l = strv_from_stdarg_alloca(property);
2939
2940         return sd_bus_emit_properties_changed_strv(
2941                         manager->bus,
2942                         "/org/freedesktop/login1",
2943                         "org.freedesktop.login1.Manager",
2944                         l);
2945 }
2946
2947 #if 0 /// UNNEEDED by elogind
2948 static int strdup_job(sd_bus_message *reply, char **job) {
2949         const char *j;
2950         char *copy;
2951         int r;
2952
2953         r = sd_bus_message_read(reply, "o", &j);
2954         if (r < 0)
2955                 return r;
2956
2957         copy = strdup(j);
2958         if (!copy)
2959                 return -ENOMEM;
2960
2961         *job = copy;
2962         return 1;
2963 }
2964
2965 int manager_start_slice(
2966                 Manager *manager,
2967                 const char *slice,
2968                 const char *description,
2969                 const char *after,
2970                 const char *after2,
2971                 uint64_t tasks_max,
2972                 sd_bus_error *error,
2973                 char **job) {
2974
2975         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2976         int r;
2977
2978         assert(manager);
2979         assert(slice);
2980
2981         r = sd_bus_message_new_method_call(
2982                         manager->bus,
2983                         &m,
2984                         "org.freedesktop.systemd1",
2985                         "/org/freedesktop/systemd1",
2986                         "org.freedesktop.systemd1.Manager",
2987                         "StartTransientUnit");
2988         if (r < 0)
2989                 return r;
2990
2991         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2992         if (r < 0)
2993                 return r;
2994
2995         r = sd_bus_message_open_container(m, 'a', "(sv)");
2996         if (r < 0)
2997                 return r;
2998
2999         if (!isempty(description)) {
3000                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3001                 if (r < 0)
3002                         return r;
3003         }
3004
3005         if (!isempty(after)) {
3006                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3007                 if (r < 0)
3008                         return r;
3009         }
3010
3011         if (!isempty(after2)) {
3012                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3013                 if (r < 0)
3014                         return r;
3015         }
3016
3017         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3018         if (r < 0)
3019                 return r;
3020
3021         r = sd_bus_message_close_container(m);
3022         if (r < 0)
3023                 return r;
3024
3025         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3026         if (r < 0)
3027                 return r;
3028
3029         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3030         if (r < 0)
3031                 return r;
3032
3033         if (job)
3034                 return strdup_job(reply, job);
3035         return 1;
3036 }
3037
3038 int manager_start_scope(
3039                 Manager *manager,
3040                 const char *scope,
3041                 pid_t pid,
3042                 const char *slice,
3043                 const char *description,
3044                 const char *after,
3045                 const char *after2,
3046                 uint64_t tasks_max,
3047                 sd_bus_error *error,
3048                 char **job) {
3049
3050         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3051         int r;
3052
3053         assert(manager);
3054         assert(scope);
3055         assert(pid > 1);
3056
3057         r = sd_bus_message_new_method_call(
3058                         manager->bus,
3059                         &m,
3060                         "org.freedesktop.systemd1",
3061                         "/org/freedesktop/systemd1",
3062                         "org.freedesktop.systemd1.Manager",
3063                         "StartTransientUnit");
3064         if (r < 0)
3065                 return r;
3066
3067         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3068         if (r < 0)
3069                 return r;
3070
3071         r = sd_bus_message_open_container(m, 'a', "(sv)");
3072         if (r < 0)
3073                 return r;
3074
3075         if (!isempty(slice)) {
3076                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3077                 if (r < 0)
3078                         return r;
3079         }
3080
3081         if (!isempty(description)) {
3082                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3083                 if (r < 0)
3084                         return r;
3085         }
3086
3087         if (!isempty(after)) {
3088                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3089                 if (r < 0)
3090                         return r;
3091         }
3092
3093         if (!isempty(after2)) {
3094                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3095                 if (r < 0)
3096                         return r;
3097         }
3098
3099         /* cgroup empty notification is not available in containers
3100          * currently. To make this less problematic, let's shorten the
3101          * stop timeout for sessions, so that we don't wait
3102          * forever. */
3103
3104         /* Make sure that the session shells are terminated with
3105          * SIGHUP since bash and friends tend to ignore SIGTERM */
3106         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3107         if (r < 0)
3108                 return r;
3109
3110         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3111         if (r < 0)
3112                 return r;
3113
3114         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3115         if (r < 0)
3116                 return r;
3117
3118         r = sd_bus_message_close_container(m);
3119         if (r < 0)
3120                 return r;
3121
3122         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3123         if (r < 0)
3124                 return r;
3125
3126         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3127         if (r < 0)
3128                 return r;
3129
3130         if (job)
3131                 return strdup_job(reply, job);
3132         return 1;
3133 }
3134
3135 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3136         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3137         int r;
3138
3139         assert(manager);
3140         assert(unit);
3141
3142         r = sd_bus_call_method(
3143                         manager->bus,
3144                         "org.freedesktop.systemd1",
3145                         "/org/freedesktop/systemd1",
3146                         "org.freedesktop.systemd1.Manager",
3147                         "StartUnit",
3148                         error,
3149                         &reply,
3150                         "ss", unit, "replace");
3151         if (r < 0)
3152                 return r;
3153
3154         if (job)
3155                 return strdup_job(reply, job);
3156         return 1;
3157 }
3158
3159 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3160         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3161         int r;
3162
3163         assert(manager);
3164         assert(unit);
3165
3166         r = sd_bus_call_method(
3167                         manager->bus,
3168                         "org.freedesktop.systemd1",
3169                         "/org/freedesktop/systemd1",
3170                         "org.freedesktop.systemd1.Manager",
3171                         "StopUnit",
3172                         error,
3173                         &reply,
3174                         "ss", unit, "fail");
3175         if (r < 0) {
3176                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3177                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3178
3179                         if (job)
3180                                 *job = NULL;
3181
3182                         sd_bus_error_free(error);
3183                         return 0;
3184                 }
3185
3186                 return r;
3187         }
3188
3189         if (job)
3190                 return strdup_job(reply, job);
3191         return 1;
3192 }
3193
3194 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3195         _cleanup_free_ char *path = NULL;
3196         int r;
3197
3198         assert(manager);
3199         assert(scope);
3200
3201         path = unit_dbus_path_from_name(scope);
3202         if (!path)
3203                 return -ENOMEM;
3204
3205         r = sd_bus_call_method(
3206                         manager->bus,
3207                         "org.freedesktop.systemd1",
3208                         path,
3209                         "org.freedesktop.systemd1.Scope",
3210                         "Abandon",
3211                         error,
3212                         NULL,
3213                         NULL);
3214         if (r < 0) {
3215                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3216                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3217                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3218                         sd_bus_error_free(error);
3219                         return 0;
3220                 }
3221
3222                 return r;
3223         }
3224
3225         return 1;
3226 }
3227
3228 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3229         assert(manager);
3230         assert(unit);
3231
3232         return sd_bus_call_method(
3233                         manager->bus,
3234                         "org.freedesktop.systemd1",
3235                         "/org/freedesktop/systemd1",
3236                         "org.freedesktop.systemd1.Manager",
3237                         "KillUnit",
3238                         error,
3239                         NULL,
3240                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3241 }
3242
3243 int manager_unit_is_active(Manager *manager, const char *unit) {
3244         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3245         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3246         _cleanup_free_ char *path = NULL;
3247         const char *state;
3248         int r;
3249
3250         assert(manager);
3251         assert(unit);
3252
3253         path = unit_dbus_path_from_name(unit);
3254         if (!path)
3255                 return -ENOMEM;
3256
3257         r = sd_bus_get_property(
3258                         manager->bus,
3259                         "org.freedesktop.systemd1",
3260                         path,
3261                         "org.freedesktop.systemd1.Unit",
3262                         "ActiveState",
3263                         &error,
3264                         &reply,
3265                         "s");
3266         if (r < 0) {
3267                 /* systemd might have droppped off momentarily, let's
3268                  * not make this an error */
3269                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3270                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3271                         return true;
3272
3273                 /* If the unit is already unloaded then it's not
3274                  * active */
3275                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3276                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3277                         return false;
3278
3279                 return r;
3280         }
3281
3282         r = sd_bus_message_read(reply, "s", &state);
3283         if (r < 0)
3284                 return -EINVAL;
3285
3286         return !streq(state, "inactive") && !streq(state, "failed");
3287 }
3288
3289 int manager_job_is_active(Manager *manager, const char *path) {
3290         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3291         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3292         int r;
3293
3294         assert(manager);
3295         assert(path);
3296
3297         r = sd_bus_get_property(
3298                         manager->bus,
3299                         "org.freedesktop.systemd1",
3300                         path,
3301                         "org.freedesktop.systemd1.Job",
3302                         "State",
3303                         &error,
3304                         &reply,
3305                         "s");
3306         if (r < 0) {
3307                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3308                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3309                         return true;
3310
3311                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3312                         return false;
3313
3314                 return r;
3315         }
3316
3317         /* We don't actually care about the state really. The fact
3318          * that we could read the job state is enough for us */
3319
3320         return true;
3321 }
3322 #endif // 0