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         if (r < 0)
1631                 return r;
1632
1633         /* As elogind can not rely on a systemd manager to call all
1634          * sleeping processes to wake up, we have to tell them all
1635          * by ourselves. */
1636         if (w == INHIBIT_SLEEP) {
1637                 send_prepare_for(m, w, false);
1638                 m->action_what = 0;
1639         } else
1640                 m->action_what = w;
1641 #endif // 0
1642
1643         /* Make sure the lid switch is ignored for a while */
1644         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1645
1646         return 0;
1647 }
1648
1649 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1650
1651         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1652         Inhibitor *offending = NULL;
1653         int r;
1654
1655         assert(manager);
1656
1657         if ( (0 == manager->action_what) || (HANDLE_IGNORE == manager->pending_action) )
1658                 return 0;
1659
1660         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1661                 _cleanup_free_ char *comm = NULL, *u = NULL;
1662
1663                 if (!timeout)
1664                         return 0;
1665
1666                 (void) get_process_comm(offending->pid, &comm);
1667                 u = uid_to_name(offending->uid);
1668
1669                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1670                            offending->uid, strna(u),
1671                            offending->pid, strna(comm));
1672         }
1673
1674         /* Actually do the operation */
1675         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->pending_action, &error);
1676         if (r < 0) {
1677                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1678
1679                 manager->pending_action = HANDLE_IGNORE;
1680                 manager->action_what    = 0;
1681                 return r;
1682         }
1683
1684         return 1;
1685 }
1686
1687 static int manager_inhibit_timeout_handler(
1688                         sd_event_source *s,
1689                         uint64_t usec,
1690                         void *userdata) {
1691
1692         Manager *manager = userdata;
1693         int r;
1694
1695         assert(manager);
1696         assert(manager->inhibit_timeout_source == s);
1697
1698         r = manager_dispatch_delayed(manager, true);
1699         return (r < 0) ? r : 0;
1700 }
1701
1702 static int delay_shutdown_or_sleep(
1703                 Manager *m,
1704                 InhibitWhat w,
1705                 HandleAction action) {
1706
1707         int r;
1708         usec_t timeout_val;
1709
1710         assert(m);
1711         assert(w >= 0);
1712         assert(w < _INHIBIT_WHAT_MAX);
1713
1714         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1715
1716         if (m->inhibit_timeout_source) {
1717                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1718                 if (r < 0)
1719                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1720
1721                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1722                 if (r < 0)
1723                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1724         } else {
1725                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1726                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1727                 if (r < 0)
1728                         return r;
1729         }
1730
1731         m->pending_action = action;
1732         m->action_what = w;
1733
1734         return 0;
1735 }
1736
1737 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1738
1739         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1740                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1741                 [INHIBIT_SLEEP] = "PrepareForSleep"
1742         };
1743
1744         int active = _active;
1745
1746         assert(m);
1747         assert(w >= 0);
1748         assert(w < _INHIBIT_WHAT_MAX);
1749         assert(signal_name[w]);
1750
1751         return sd_bus_emit_signal(m->bus,
1752                                   "/org/freedesktop/login1",
1753                                   "org.freedesktop.login1.Manager",
1754                                   signal_name[w],
1755                                   "b",
1756                                   active);
1757 }
1758
1759 int bus_manager_shutdown_or_sleep_now_or_later(
1760                 Manager *m,
1761                 HandleAction action,
1762                 InhibitWhat w,
1763                 sd_bus_error *error) {
1764
1765         bool delayed;
1766         int r;
1767
1768         assert(m);
1769         assert(w >= 0);
1770         assert(w <= _INHIBIT_WHAT_MAX);
1771
1772         /* Tell everybody to prepare for shutdown/sleep */
1773         send_prepare_for(m, w, true);
1774
1775         delayed =
1776                 m->inhibit_delay_max > 0 &&
1777                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1778
1779         log_debug_elogind("%s called for %s (%sdelayed)", __FUNCTION__,
1780                           handle_action_to_string(action),
1781                           delayed ? "" : "NOT ");
1782
1783         if (delayed)
1784                 /* Shutdown is delayed, keep in mind what we
1785                  * want to do, and start a timeout */
1786                 r = delay_shutdown_or_sleep(m, w, action);
1787         else
1788                 /* Shutdown is not delayed, execute it
1789                  * immediately */
1790                 r = execute_shutdown_or_sleep(m, w, action, error);
1791
1792         return r;
1793 }
1794
1795 static int verify_shutdown_creds(
1796                 Manager *m,
1797                 sd_bus_message *message,
1798                 InhibitWhat w,
1799                 bool interactive,
1800                 const char *action,
1801                 const char *action_multiple_sessions,
1802                 const char *action_ignore_inhibit,
1803                 sd_bus_error *error) {
1804
1805         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1806         bool multiple_sessions, blocked;
1807         uid_t uid;
1808         int r;
1809
1810         assert(m);
1811         assert(message);
1812         assert(w >= 0);
1813         assert(w <= _INHIBIT_WHAT_MAX);
1814
1815         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1816         if (r < 0)
1817                 return r;
1818
1819         r = sd_bus_creds_get_euid(creds, &uid);
1820         if (r < 0)
1821                 return r;
1822
1823         r = have_multiple_sessions(m, uid);
1824         if (r < 0)
1825                 return r;
1826
1827         multiple_sessions = r > 0;
1828         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1829
1830         if (multiple_sessions && action_multiple_sessions) {
1831                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1832                 if (r < 0)
1833                         return r;
1834                 if (r == 0)
1835                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1836         }
1837
1838         if (blocked && action_ignore_inhibit) {
1839                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1840                 if (r < 0)
1841                         return r;
1842                 if (r == 0)
1843                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1844         }
1845
1846         if (!multiple_sessions && !blocked && action) {
1847                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1848                 if (r < 0)
1849                         return r;
1850                 if (r == 0)
1851                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1852         }
1853
1854         return 0;
1855 }
1856
1857 static int method_do_shutdown_or_sleep(
1858                 Manager *m,
1859                 sd_bus_message *message,
1860                 HandleAction sleep_action,
1861                 InhibitWhat w,
1862                 const char *action,
1863                 const char *action_multiple_sessions,
1864                 const char *action_ignore_inhibit,
1865                 const char *sleep_verb,
1866                 sd_bus_error *error) {
1867
1868         int interactive, r;
1869
1870         assert(m);
1871         assert(message);
1872         assert(w >= 0);
1873         assert(w <= _INHIBIT_WHAT_MAX);
1874
1875         r = sd_bus_message_read(message, "b", &interactive);
1876         if (r < 0)
1877                 return r;
1878
1879         log_debug_elogind("%s called with action '%s', sleep '%s' (%sinteractive)",
1880                           __FUNCTION__, action, sleep_verb,
1881                           interactive ? "" : "NOT ");
1882
1883         /* Don't allow multiple jobs being executed at the same time */
1884         if (m->action_what)
1885                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1886
1887         if (sleep_verb) {
1888                 r = can_sleep(m, sleep_verb);
1889                 if (r < 0)
1890                         return r;
1891
1892                 if (r == 0)
1893                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1894         }
1895
1896         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1897                                   action_ignore_inhibit, error);
1898         log_debug_elogind("verify_shutdown_creds() returned %d", r);
1899         if (r != 0)
1900                 return r;
1901
1902         r = bus_manager_shutdown_or_sleep_now_or_later(m, sleep_action, w, error);
1903         if (r < 0)
1904                 return r;
1905
1906         return sd_bus_reply_method_return(message, NULL);
1907 }
1908
1909 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1910         Manager *m = userdata;
1911
1912         log_debug_elogind("%s called", __FUNCTION__);
1913
1914         return method_do_shutdown_or_sleep(
1915                         m, message,
1916                         HANDLE_POWEROFF,
1917                         INHIBIT_SHUTDOWN,
1918                         "org.freedesktop.login1.power-off",
1919                         "org.freedesktop.login1.power-off-multiple-sessions",
1920                         "org.freedesktop.login1.power-off-ignore-inhibit",
1921                         NULL,
1922                         error);
1923 }
1924
1925 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1926         Manager *m = userdata;
1927
1928         log_debug_elogind("%s called", __FUNCTION__);
1929
1930         return method_do_shutdown_or_sleep(
1931                         m, message,
1932                         HANDLE_REBOOT,
1933                         INHIBIT_SHUTDOWN,
1934                         "org.freedesktop.login1.reboot",
1935                         "org.freedesktop.login1.reboot-multiple-sessions",
1936                         "org.freedesktop.login1.reboot-ignore-inhibit",
1937                         NULL,
1938                         error);
1939 }
1940
1941 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1942         Manager *m = userdata;
1943
1944         log_debug_elogind("%s called", __FUNCTION__);
1945
1946         return method_do_shutdown_or_sleep(
1947                         m, message,
1948                         HANDLE_SUSPEND,
1949                         INHIBIT_SLEEP,
1950                         "org.freedesktop.login1.suspend",
1951                         "org.freedesktop.login1.suspend-multiple-sessions",
1952                         "org.freedesktop.login1.suspend-ignore-inhibit",
1953                         "suspend",
1954                         error);
1955 }
1956
1957 static int nologin_timeout_handler(
1958                         sd_event_source *s,
1959                         uint64_t usec,
1960                         void *userdata) {
1961
1962         Manager *m = userdata;
1963         int r;
1964
1965         log_info("Creating /run/nologin, blocking further logins...");
1966
1967         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1968         if (r < 0)
1969                 log_error_errno(r, "Failed to create /run/nologin: %m");
1970         else
1971                 m->unlink_nologin = true;
1972
1973         return 0;
1974 }
1975
1976 static int update_schedule_file(Manager *m) {
1977         _cleanup_free_ char *temp_path = NULL;
1978         _cleanup_fclose_ FILE *f = NULL;
1979         int r;
1980
1981         assert(m);
1982
1983         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1984         if (r < 0)
1985                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1986
1987         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1988         if (r < 0)
1989                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1990
1991         (void) fchmod(fileno(f), 0644);
1992
1993         fprintf(f,
1994                 "USEC="USEC_FMT"\n"
1995                 "WARN_WALL=%i\n"
1996                 "MODE=%s\n",
1997                 m->scheduled_shutdown_timeout,
1998                 m->enable_wall_messages,
1999                 m->scheduled_shutdown_type);
2000
2001         if (!isempty(m->wall_message)) {
2002                 _cleanup_free_ char *t;
2003
2004                 t = cescape(m->wall_message);
2005                 if (!t) {
2006                         r = -ENOMEM;
2007                         goto fail;
2008                 }
2009
2010                 fprintf(f, "WALL_MESSAGE=%s\n", t);
2011         }
2012
2013         r = fflush_and_check(f);
2014         if (r < 0)
2015                 goto fail;
2016
2017         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2018                 r = -errno;
2019                 goto fail;
2020         }
2021
2022         return 0;
2023
2024 fail:
2025         (void) unlink(temp_path);
2026         (void) unlink("/run/systemd/shutdown/scheduled");
2027
2028         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2029 }
2030
2031 static int manager_scheduled_shutdown_handler(
2032                         sd_event_source *s,
2033                         uint64_t usec,
2034                         void *userdata) {
2035
2036         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2037         Manager *m = userdata;
2038         HandleAction action;
2039         int r;
2040
2041         assert(m);
2042
2043         if (isempty(m->scheduled_shutdown_type))
2044                 return 0;
2045
2046         if (streq(m->scheduled_shutdown_type, "halt"))
2047                 action = HANDLE_HALT;
2048         else if (streq(m->scheduled_shutdown_type, "poweroff"))
2049                 action = HANDLE_POWEROFF;
2050         else
2051                 action = HANDLE_REBOOT;
2052
2053         r = execute_shutdown_or_sleep(m, 0, action, &error);
2054         if (r < 0)
2055                 return log_error_errno(r, "Unable to execute transition to %s: %m", m->scheduled_shutdown_type);
2056
2057         return 0;
2058 }
2059
2060 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2061         Manager *m = userdata;
2062         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2063         const char *action_multiple_sessions = NULL;
2064         const char *action_ignore_inhibit = NULL;
2065         const char *action = NULL;
2066         uint64_t elapse;
2067         char *type;
2068         int r;
2069
2070         assert(m);
2071         assert(message);
2072
2073         log_debug_elogind("%s called", __FUNCTION__);
2074
2075         r = sd_bus_message_read(message, "st", &type, &elapse);
2076         if (r < 0)
2077                 return r;
2078
2079         if (startswith(type, "dry-")) {
2080                 type += 4;
2081                 m->shutdown_dry_run = true;
2082         }
2083
2084         if (streq(type, "reboot")) {
2085                 action = "org.freedesktop.login1.reboot";
2086                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2087                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2088         } else if (streq(type, "halt")) {
2089                 action = "org.freedesktop.login1.halt";
2090                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2091                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2092         } else if (streq(type, "poweroff")) {
2093                 action = "org.freedesktop.login1.power-off";
2094                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2095                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2096         } else
2097                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2098
2099         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2100                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2101         if (r != 0)
2102                 return r;
2103
2104         if (m->scheduled_shutdown_timeout_source) {
2105                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2106                 if (r < 0)
2107                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2108
2109                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2110                 if (r < 0)
2111                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2112         } else {
2113                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2114                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2115                 if (r < 0)
2116                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2117         }
2118
2119         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2120         if (r < 0) {
2121                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2122                 return log_oom();
2123         }
2124
2125         if (m->nologin_timeout_source) {
2126                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2127                 if (r < 0)
2128                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2129
2130                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2131                 if (r < 0)
2132                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2133         } else {
2134                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2135                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2136                 if (r < 0)
2137                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2138         }
2139
2140         m->scheduled_shutdown_timeout = elapse;
2141
2142         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2143         if (r >= 0) {
2144                 const char *tty = NULL;
2145
2146                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2147                 (void) sd_bus_creds_get_tty(creds, &tty);
2148
2149                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2150                 if (r < 0) {
2151                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2152                         return log_oom();
2153                 }
2154         }
2155
2156         r = manager_setup_wall_message_timer(m);
2157         if (r < 0)
2158                 return r;
2159
2160         if (!isempty(type)) {
2161                 r = update_schedule_file(m);
2162                 if (r < 0)
2163                         return r;
2164         } else
2165                 (void) unlink("/run/systemd/shutdown/scheduled");
2166
2167         return sd_bus_reply_method_return(message, NULL);
2168 }
2169
2170 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2171         Manager *m = userdata;
2172         bool cancelled;
2173 #if 1 /// elogind needs to construct the message to allow extra wall messages
2174         _cleanup_free_ char *l = NULL;
2175 #endif // 1
2176
2177         assert(m);
2178         assert(message);
2179
2180         log_debug_elogind("%s called", __FUNCTION__);
2181
2182         cancelled = m->scheduled_shutdown_type != NULL;
2183         reset_scheduled_shutdown(m);
2184
2185         if (cancelled) {
2186                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2187                 const char *tty = NULL;
2188                 uid_t uid = 0;
2189                 int r;
2190
2191                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2192                 if (r >= 0) {
2193                         (void) sd_bus_creds_get_uid(creds, &uid);
2194                         (void) sd_bus_creds_get_tty(creds, &tty);
2195                 }
2196
2197 #if 0 /// elogind wants to allow extra cancellation messages
2198                 utmp_wall("The system shutdown has been cancelled",
2199                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2200 #else
2201                 r = asprintf(&l, "%s%sThe system shutdown has been cancelled!",
2202                              strempty(m->wall_message),
2203                              isempty(m->wall_message) ? "" : "\n");
2204                 if (r < 0) {
2205                         log_oom();
2206                         return 0;
2207                 }
2208
2209                 utmp_wall(l, uid_to_name(uid), tty, logind_wall_tty_filter, m);
2210 #endif // 0
2211         }
2212
2213         return sd_bus_reply_method_return(message, "b", cancelled);
2214 }
2215
2216 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2217         Manager *m = userdata;
2218
2219         log_debug_elogind("%s called", __FUNCTION__);
2220
2221         return method_do_shutdown_or_sleep(
2222                         m, message,
2223                         HANDLE_HIBERNATE,
2224                         INHIBIT_SLEEP,
2225                         "org.freedesktop.login1.hibernate",
2226                         "org.freedesktop.login1.hibernate-multiple-sessions",
2227                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2228                         "hibernate",
2229                         error);
2230 }
2231
2232 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2233         Manager *m = userdata;
2234
2235         log_debug_elogind("%s called", __FUNCTION__);
2236
2237         return method_do_shutdown_or_sleep(
2238                         m, message,
2239                         HANDLE_HYBRID_SLEEP,
2240                         INHIBIT_SLEEP,
2241                         "org.freedesktop.login1.hibernate",
2242                         "org.freedesktop.login1.hibernate-multiple-sessions",
2243                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2244                         "hybrid-sleep",
2245                         error);
2246 }
2247
2248 static int method_can_shutdown_or_sleep(
2249                 Manager *m,
2250                 sd_bus_message *message,
2251                 InhibitWhat w,
2252                 const char *action,
2253                 const char *action_multiple_sessions,
2254                 const char *action_ignore_inhibit,
2255                 const char *sleep_verb,
2256                 sd_bus_error *error) {
2257
2258         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2259         bool multiple_sessions, challenge, blocked;
2260         const char *result = NULL;
2261         uid_t uid;
2262         int r;
2263
2264         assert(m);
2265         assert(message);
2266         assert(w >= 0);
2267         assert(w <= _INHIBIT_WHAT_MAX);
2268         assert(action);
2269         assert(action_multiple_sessions);
2270         assert(action_ignore_inhibit);
2271
2272         if (sleep_verb) {
2273                 r = can_sleep(m, sleep_verb);
2274                 if (r < 0)
2275                         return r;
2276                 if (r == 0)
2277                         return sd_bus_reply_method_return(message, "s", "na");
2278         }
2279
2280         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2281         if (r < 0)
2282                 return r;
2283
2284         r = sd_bus_creds_get_euid(creds, &uid);
2285         if (r < 0)
2286                 return r;
2287
2288         r = have_multiple_sessions(m, uid);
2289         if (r < 0)
2290                 return r;
2291
2292         multiple_sessions = r > 0;
2293         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2294
2295         if (multiple_sessions) {
2296                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2297                 if (r < 0)
2298                         return r;
2299
2300                 if (r > 0)
2301                         result = "yes";
2302                 else if (challenge)
2303                         result = "challenge";
2304                 else
2305                         result = "no";
2306         }
2307
2308         if (blocked) {
2309                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2310                 if (r < 0)
2311                         return r;
2312
2313                 if (r > 0 && !result)
2314                         result = "yes";
2315                 else if (challenge && (!result || streq(result, "yes")))
2316                         result = "challenge";
2317                 else
2318                         result = "no";
2319         }
2320
2321         if (!multiple_sessions && !blocked) {
2322                 /* If neither inhibit nor multiple sessions
2323                  * apply then just check the normal policy */
2324
2325                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2326                 if (r < 0)
2327                         return r;
2328
2329                 if (r > 0)
2330                         result = "yes";
2331                 else if (challenge)
2332                         result = "challenge";
2333                 else
2334                         result = "no";
2335         }
2336
2337         return sd_bus_reply_method_return(message, "s", result);
2338 }
2339
2340 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2341         Manager *m = userdata;
2342
2343         return method_can_shutdown_or_sleep(
2344                         m, message,
2345                         INHIBIT_SHUTDOWN,
2346                         "org.freedesktop.login1.power-off",
2347                         "org.freedesktop.login1.power-off-multiple-sessions",
2348                         "org.freedesktop.login1.power-off-ignore-inhibit",
2349                         NULL,
2350                         error);
2351 }
2352
2353 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2354         Manager *m = userdata;
2355
2356         return method_can_shutdown_or_sleep(
2357                         m, message,
2358                         INHIBIT_SHUTDOWN,
2359                         "org.freedesktop.login1.reboot",
2360                         "org.freedesktop.login1.reboot-multiple-sessions",
2361                         "org.freedesktop.login1.reboot-ignore-inhibit",
2362                         NULL,
2363                         error);
2364 }
2365
2366 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2367         Manager *m = userdata;
2368
2369         return method_can_shutdown_or_sleep(
2370                         m, message,
2371                         INHIBIT_SLEEP,
2372                         "org.freedesktop.login1.suspend",
2373                         "org.freedesktop.login1.suspend-multiple-sessions",
2374                         "org.freedesktop.login1.suspend-ignore-inhibit",
2375                         "suspend",
2376                         error);
2377 }
2378
2379 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2380         Manager *m = userdata;
2381
2382         return method_can_shutdown_or_sleep(
2383                         m, message,
2384                         INHIBIT_SLEEP,
2385                         "org.freedesktop.login1.hibernate",
2386                         "org.freedesktop.login1.hibernate-multiple-sessions",
2387                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2388                         "hibernate",
2389                         error);
2390 }
2391
2392 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2393         Manager *m = userdata;
2394
2395         return method_can_shutdown_or_sleep(
2396                         m, message,
2397                         INHIBIT_SLEEP,
2398                         "org.freedesktop.login1.hibernate",
2399                         "org.freedesktop.login1.hibernate-multiple-sessions",
2400                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2401                         "hybrid-sleep",
2402                         error);
2403 }
2404
2405 static int property_get_reboot_to_firmware_setup(
2406                 sd_bus *bus,
2407                 const char *path,
2408                 const char *interface,
2409                 const char *property,
2410                 sd_bus_message *reply,
2411                 void *userdata,
2412                 sd_bus_error *error) {
2413 #if 0 /// elogind does not support EFI
2414         int r;
2415
2416         assert(bus);
2417         assert(reply);
2418         assert(userdata);
2419
2420         r = efi_get_reboot_to_firmware();
2421         if (r < 0 && r != -EOPNOTSUPP)
2422                 return r;
2423
2424         return sd_bus_message_append(reply, "b", r > 0);
2425 #else
2426         return sd_bus_message_append(reply, "b", false);
2427 #endif // 0
2428 }
2429
2430 static int method_set_reboot_to_firmware_setup(
2431                 sd_bus_message *message,
2432                 void *userdata,
2433                 sd_bus_error *error) {
2434
2435         int b, r;
2436         Manager *m = userdata;
2437
2438         assert(message);
2439         assert(m);
2440
2441         r = sd_bus_message_read(message, "b", &b);
2442         if (r < 0)
2443                 return r;
2444
2445         r = bus_verify_polkit_async(message,
2446                                     CAP_SYS_ADMIN,
2447                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2448                                     NULL,
2449                                     false,
2450                                     UID_INVALID,
2451                                     &m->polkit_registry,
2452                                     error);
2453         if (r < 0)
2454                 return r;
2455         if (r == 0)
2456                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2457
2458 #if 0 /// elogind does not support EFI
2459         r = efi_set_reboot_to_firmware(b);
2460         if (r < 0)
2461                 return r;
2462 #endif // 0
2463
2464         return sd_bus_reply_method_return(message, NULL);
2465 }
2466
2467 static int method_can_reboot_to_firmware_setup(
2468                 sd_bus_message *message,
2469                 void *userdata,
2470                 sd_bus_error *error) {
2471
2472 #if 0 /// elogind does not support EFI
2473         int r;
2474         bool challenge;
2475         const char *result;
2476         Manager *m = userdata;
2477
2478         assert(message);
2479         assert(m);
2480
2481         r = efi_reboot_to_firmware_supported();
2482         if (r == -EOPNOTSUPP)
2483                 return sd_bus_reply_method_return(message, "s", "na");
2484         else if (r < 0)
2485                 return r;
2486
2487         r = bus_test_polkit(message,
2488                             CAP_SYS_ADMIN,
2489                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2490                             NULL,
2491                             UID_INVALID,
2492                             &challenge,
2493                             error);
2494         if (r < 0)
2495                 return r;
2496
2497         if (r > 0)
2498                 result = "yes";
2499         else if (challenge)
2500                 result = "challenge";
2501         else
2502                 result = "no";
2503
2504         return sd_bus_reply_method_return(message, "s", result);
2505 #else
2506         return sd_bus_reply_method_return(message, "s", "no");
2507 #endif // 0
2508 }
2509
2510 static int method_set_wall_message(
2511                 sd_bus_message *message,
2512                 void *userdata,
2513                 sd_bus_error *error) {
2514
2515         int r;
2516         Manager *m = userdata;
2517         char *wall_message;
2518         int enable_wall_messages;
2519
2520         assert(message);
2521         assert(m);
2522
2523         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2524         if (r < 0)
2525                 return r;
2526
2527         r = bus_verify_polkit_async(message,
2528                                     CAP_SYS_ADMIN,
2529                                     "org.freedesktop.login1.set-wall-message",
2530                                     NULL,
2531                                     false,
2532                                     UID_INVALID,
2533                                     &m->polkit_registry,
2534                                     error);
2535         if (r < 0)
2536                 return r;
2537         if (r == 0)
2538                 return 1; /* Will call us back */
2539
2540         if (isempty(wall_message))
2541                 m->wall_message = mfree(m->wall_message);
2542         else {
2543                 r = free_and_strdup(&m->wall_message, wall_message);
2544                 if (r < 0)
2545                         return log_oom();
2546         }
2547
2548         m->enable_wall_messages = enable_wall_messages;
2549
2550         return sd_bus_reply_method_return(message, NULL);
2551 }
2552
2553 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2554         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2555         const char *who, *why, *what, *mode;
2556         _cleanup_free_ char *id = NULL;
2557         _cleanup_close_ int fifo_fd = -1;
2558         Manager *m = userdata;
2559         Inhibitor *i = NULL;
2560         InhibitMode mm;
2561         InhibitWhat w;
2562         pid_t pid;
2563         uid_t uid;
2564         int r;
2565
2566         assert(message);
2567         assert(m);
2568
2569         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2570         if (r < 0)
2571                 return r;
2572
2573         w = inhibit_what_from_string(what);
2574         if (w <= 0)
2575                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2576
2577         mm = inhibit_mode_from_string(mode);
2578         if (mm < 0)
2579                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2580
2581         /* Delay is only supported for shutdown/sleep */
2582         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2583                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2584
2585         /* Don't allow taking delay locks while we are already
2586          * executing the operation. We shouldn't create the impression
2587          * that the lock was successful if the machine is about to go
2588          * down/suspend any moment. */
2589         if (m->action_what & w)
2590                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2591
2592         r = bus_verify_polkit_async(
2593                         message,
2594                         CAP_SYS_BOOT,
2595                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2596                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2597                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2598                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2599                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2600                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2601                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2602                         NULL,
2603                         false,
2604                         UID_INVALID,
2605                         &m->polkit_registry,
2606                         error);
2607         if (r < 0)
2608                 return r;
2609         if (r == 0)
2610                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2611
2612         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2613         if (r < 0)
2614                 return r;
2615
2616         r = sd_bus_creds_get_euid(creds, &uid);
2617         if (r < 0)
2618                 return r;
2619
2620         r = sd_bus_creds_get_pid(creds, &pid);
2621         if (r < 0)
2622                 return r;
2623
2624         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2625                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2626
2627         do {
2628                 id = mfree(id);
2629
2630                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2631                         return -ENOMEM;
2632
2633         } while (hashmap_get(m->inhibitors, id));
2634
2635         r = manager_add_inhibitor(m, id, &i);
2636         if (r < 0)
2637                 return r;
2638
2639         i->what = w;
2640         i->mode = mm;
2641         i->pid = pid;
2642         i->uid = uid;
2643         i->why = strdup(why);
2644         i->who = strdup(who);
2645
2646         if (!i->why || !i->who) {
2647                 r = -ENOMEM;
2648                 goto fail;
2649         }
2650
2651         fifo_fd = inhibitor_create_fifo(i);
2652         if (fifo_fd < 0) {
2653                 r = fifo_fd;
2654                 goto fail;
2655         }
2656
2657         inhibitor_start(i);
2658
2659         return sd_bus_reply_method_return(message, "h", fifo_fd);
2660
2661 fail:
2662         if (i)
2663                 inhibitor_free(i);
2664
2665         return r;
2666 }
2667
2668 const sd_bus_vtable manager_vtable[] = {
2669         SD_BUS_VTABLE_START(0),
2670
2671         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2672         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2673
2674 //        SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2675         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2676         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2677         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2678         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2679         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2680         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2681         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2682         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2683         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2684         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2685         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2686         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2687         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2688         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2689         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2690         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2691         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2692         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2693         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2694         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2695         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2696         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2697         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2698         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2699         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2700         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2701         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2702         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2703         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2704
2705         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2706         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2707         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2708         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2709         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2710         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2711         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2712         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2713         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2714         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2715         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2716         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2717         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2718         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2719         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2720         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2721         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2722         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2723         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2724         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2725         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2726         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2727         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2728         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2729         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2730         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2731         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2732         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2733         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2734         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2735         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2736         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2737         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2738         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2739         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2740         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2741         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2742         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2743         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2744         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2745         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2746
2747         SD_BUS_SIGNAL("SessionNew", "so", 0),
2748         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2749         SD_BUS_SIGNAL("UserNew", "uo", 0),
2750         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2751         SD_BUS_SIGNAL("SeatNew", "so", 0),
2752         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2753         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2754         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2755
2756         SD_BUS_VTABLE_END
2757 };
2758
2759 #if 0 /// UNNEEDED by elogind
2760 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2761         int r = 0;
2762
2763         assert(s);
2764         assert(unit);
2765
2766         if (!s->started)
2767                 return r;
2768
2769         if (streq(result, "done"))
2770                 r = session_send_create_reply(s, NULL);
2771         else {
2772                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2773
2774                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2775                 r = session_send_create_reply(s, &e);
2776         }
2777
2778         return r;
2779 }
2780
2781 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2782         const char *path, *result, *unit;
2783         Manager *m = userdata;
2784         Session *session;
2785         uint32_t id;
2786         User *user;
2787         int r;
2788
2789         assert(message);
2790         assert(m);
2791
2792         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2793         if (r < 0) {
2794                 bus_log_parse_error(r);
2795                 return 0;
2796         }
2797
2798         if (m->action_job && streq(m->action_job, path)) {
2799                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2800
2801                 /* Tell people that they now may take a lock again */
2802                 send_prepare_for(m, m->action_what, false);
2803
2804                 m->action_job = mfree(m->action_job);
2805                 m->action_unit = NULL;
2806                 m->action_what = 0;
2807                 return 0;
2808         }
2809
2810         session = hashmap_get(m->session_units, unit);
2811         if (session && streq_ptr(path, session->scope_job)) {
2812                 session->scope_job = mfree(session->scope_job);
2813                 session_jobs_reply(session, unit, result);
2814
2815                 session_save(session);
2816                 user_save(session->user);
2817                 session_add_to_gc_queue(session);
2818         }
2819
2820         user = hashmap_get(m->user_units, unit);
2821         if (user &&
2822             (streq_ptr(path, user->service_job) ||
2823              streq_ptr(path, user->slice_job))) {
2824
2825                 if (streq_ptr(path, user->service_job))
2826                         user->service_job = mfree(user->service_job);
2827
2828                 if (streq_ptr(path, user->slice_job))
2829                         user->slice_job = mfree(user->slice_job);
2830
2831                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2832                         session_jobs_reply(session, unit, result);
2833
2834                 user_save(user);
2835                 user_add_to_gc_queue(user);
2836         }
2837
2838         return 0;
2839 }
2840
2841 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2842         const char *path, *unit;
2843         Manager *m = userdata;
2844         Session *session;
2845         User *user;
2846         int r;
2847
2848         assert(message);
2849         assert(m);
2850
2851         r = sd_bus_message_read(message, "so", &unit, &path);
2852         if (r < 0) {
2853                 bus_log_parse_error(r);
2854                 return 0;
2855         }
2856
2857         session = hashmap_get(m->session_units, unit);
2858         if (session)
2859                 session_add_to_gc_queue(session);
2860
2861         user = hashmap_get(m->user_units, unit);
2862         if (user)
2863                 user_add_to_gc_queue(user);
2864
2865         return 0;
2866 }
2867
2868 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2869         _cleanup_free_ char *unit = NULL;
2870         Manager *m = userdata;
2871         const char *path;
2872         Session *session;
2873         User *user;
2874         int r;
2875
2876         assert(message);
2877         assert(m);
2878
2879         path = sd_bus_message_get_path(message);
2880         if (!path)
2881                 return 0;
2882
2883         r = unit_name_from_dbus_path(path, &unit);
2884         if (r == -EINVAL) /* not a unit */
2885                 return 0;
2886         if (r < 0) {
2887                 log_oom();
2888                 return 0;
2889         }
2890
2891         session = hashmap_get(m->session_units, unit);
2892         if (session)
2893                 session_add_to_gc_queue(session);
2894
2895         user = hashmap_get(m->user_units, unit);
2896         if (user)
2897                 user_add_to_gc_queue(user);
2898
2899         return 0;
2900 }
2901
2902 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2903         Manager *m = userdata;
2904         Session *session;
2905         Iterator i;
2906         int b, r;
2907
2908         assert(message);
2909         assert(m);
2910
2911         r = sd_bus_message_read(message, "b", &b);
2912         if (r < 0) {
2913                 bus_log_parse_error(r);
2914                 return 0;
2915         }
2916
2917         if (b)
2918                 return 0;
2919
2920         /* systemd finished reloading, let's recheck all our sessions */
2921         log_debug("System manager has been reloaded, rechecking sessions...");
2922
2923         HASHMAP_FOREACH(session, m->sessions, i)
2924                 session_add_to_gc_queue(session);
2925
2926         return 0;
2927 }
2928 #endif // 0
2929
2930 int manager_send_changed(Manager *manager, const char *property, ...) {
2931         char **l;
2932
2933         assert(manager);
2934
2935         l = strv_from_stdarg_alloca(property);
2936
2937         return sd_bus_emit_properties_changed_strv(
2938                         manager->bus,
2939                         "/org/freedesktop/login1",
2940                         "org.freedesktop.login1.Manager",
2941                         l);
2942 }
2943
2944 #if 0 /// UNNEEDED by elogind
2945 static int strdup_job(sd_bus_message *reply, char **job) {
2946         const char *j;
2947         char *copy;
2948         int r;
2949
2950         r = sd_bus_message_read(reply, "o", &j);
2951         if (r < 0)
2952                 return r;
2953
2954         copy = strdup(j);
2955         if (!copy)
2956                 return -ENOMEM;
2957
2958         *job = copy;
2959         return 1;
2960 }
2961
2962 int manager_start_slice(
2963                 Manager *manager,
2964                 const char *slice,
2965                 const char *description,
2966                 const char *after,
2967                 const char *after2,
2968                 uint64_t tasks_max,
2969                 sd_bus_error *error,
2970                 char **job) {
2971
2972         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2973         int r;
2974
2975         assert(manager);
2976         assert(slice);
2977
2978         r = sd_bus_message_new_method_call(
2979                         manager->bus,
2980                         &m,
2981                         "org.freedesktop.systemd1",
2982                         "/org/freedesktop/systemd1",
2983                         "org.freedesktop.systemd1.Manager",
2984                         "StartTransientUnit");
2985         if (r < 0)
2986                 return r;
2987
2988         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2989         if (r < 0)
2990                 return r;
2991
2992         r = sd_bus_message_open_container(m, 'a', "(sv)");
2993         if (r < 0)
2994                 return r;
2995
2996         if (!isempty(description)) {
2997                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2998                 if (r < 0)
2999                         return r;
3000         }
3001
3002         if (!isempty(after)) {
3003                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3004                 if (r < 0)
3005                         return r;
3006         }
3007
3008         if (!isempty(after2)) {
3009                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3010                 if (r < 0)
3011                         return r;
3012         }
3013
3014         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3015         if (r < 0)
3016                 return r;
3017
3018         r = sd_bus_message_close_container(m);
3019         if (r < 0)
3020                 return r;
3021
3022         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3023         if (r < 0)
3024                 return r;
3025
3026         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3027         if (r < 0)
3028                 return r;
3029
3030         if (job)
3031                 return strdup_job(reply, job);
3032         return 1;
3033 }
3034
3035 int manager_start_scope(
3036                 Manager *manager,
3037                 const char *scope,
3038                 pid_t pid,
3039                 const char *slice,
3040                 const char *description,
3041                 const char *after,
3042                 const char *after2,
3043                 uint64_t tasks_max,
3044                 sd_bus_error *error,
3045                 char **job) {
3046
3047         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3048         int r;
3049
3050         assert(manager);
3051         assert(scope);
3052         assert(pid > 1);
3053
3054         r = sd_bus_message_new_method_call(
3055                         manager->bus,
3056                         &m,
3057                         "org.freedesktop.systemd1",
3058                         "/org/freedesktop/systemd1",
3059                         "org.freedesktop.systemd1.Manager",
3060                         "StartTransientUnit");
3061         if (r < 0)
3062                 return r;
3063
3064         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3065         if (r < 0)
3066                 return r;
3067
3068         r = sd_bus_message_open_container(m, 'a', "(sv)");
3069         if (r < 0)
3070                 return r;
3071
3072         if (!isempty(slice)) {
3073                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3074                 if (r < 0)
3075                         return r;
3076         }
3077
3078         if (!isempty(description)) {
3079                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3080                 if (r < 0)
3081                         return r;
3082         }
3083
3084         if (!isempty(after)) {
3085                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3086                 if (r < 0)
3087                         return r;
3088         }
3089
3090         if (!isempty(after2)) {
3091                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3092                 if (r < 0)
3093                         return r;
3094         }
3095
3096         /* cgroup empty notification is not available in containers
3097          * currently. To make this less problematic, let's shorten the
3098          * stop timeout for sessions, so that we don't wait
3099          * forever. */
3100
3101         /* Make sure that the session shells are terminated with
3102          * SIGHUP since bash and friends tend to ignore SIGTERM */
3103         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3104         if (r < 0)
3105                 return r;
3106
3107         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3108         if (r < 0)
3109                 return r;
3110
3111         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3112         if (r < 0)
3113                 return r;
3114
3115         r = sd_bus_message_close_container(m);
3116         if (r < 0)
3117                 return r;
3118
3119         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3120         if (r < 0)
3121                 return r;
3122
3123         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3124         if (r < 0)
3125                 return r;
3126
3127         if (job)
3128                 return strdup_job(reply, job);
3129         return 1;
3130 }
3131
3132 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3133         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3134         int r;
3135
3136         assert(manager);
3137         assert(unit);
3138
3139         r = sd_bus_call_method(
3140                         manager->bus,
3141                         "org.freedesktop.systemd1",
3142                         "/org/freedesktop/systemd1",
3143                         "org.freedesktop.systemd1.Manager",
3144                         "StartUnit",
3145                         error,
3146                         &reply,
3147                         "ss", unit, "replace");
3148         if (r < 0)
3149                 return r;
3150
3151         if (job)
3152                 return strdup_job(reply, job);
3153         return 1;
3154 }
3155
3156 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3157         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3158         int r;
3159
3160         assert(manager);
3161         assert(unit);
3162
3163         r = sd_bus_call_method(
3164                         manager->bus,
3165                         "org.freedesktop.systemd1",
3166                         "/org/freedesktop/systemd1",
3167                         "org.freedesktop.systemd1.Manager",
3168                         "StopUnit",
3169                         error,
3170                         &reply,
3171                         "ss", unit, "fail");
3172         if (r < 0) {
3173                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3174                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3175
3176                         if (job)
3177                                 *job = NULL;
3178
3179                         sd_bus_error_free(error);
3180                         return 0;
3181                 }
3182
3183                 return r;
3184         }
3185
3186         if (job)
3187                 return strdup_job(reply, job);
3188         return 1;
3189 }
3190
3191 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3192         _cleanup_free_ char *path = NULL;
3193         int r;
3194
3195         assert(manager);
3196         assert(scope);
3197
3198         path = unit_dbus_path_from_name(scope);
3199         if (!path)
3200                 return -ENOMEM;
3201
3202         r = sd_bus_call_method(
3203                         manager->bus,
3204                         "org.freedesktop.systemd1",
3205                         path,
3206                         "org.freedesktop.systemd1.Scope",
3207                         "Abandon",
3208                         error,
3209                         NULL,
3210                         NULL);
3211         if (r < 0) {
3212                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3213                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3214                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3215                         sd_bus_error_free(error);
3216                         return 0;
3217                 }
3218
3219                 return r;
3220         }
3221
3222         return 1;
3223 }
3224
3225 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3226         assert(manager);
3227         assert(unit);
3228
3229         return sd_bus_call_method(
3230                         manager->bus,
3231                         "org.freedesktop.systemd1",
3232                         "/org/freedesktop/systemd1",
3233                         "org.freedesktop.systemd1.Manager",
3234                         "KillUnit",
3235                         error,
3236                         NULL,
3237                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3238 }
3239
3240 int manager_unit_is_active(Manager *manager, const char *unit) {
3241         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3242         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3243         _cleanup_free_ char *path = NULL;
3244         const char *state;
3245         int r;
3246
3247         assert(manager);
3248         assert(unit);
3249
3250         path = unit_dbus_path_from_name(unit);
3251         if (!path)
3252                 return -ENOMEM;
3253
3254         r = sd_bus_get_property(
3255                         manager->bus,
3256                         "org.freedesktop.systemd1",
3257                         path,
3258                         "org.freedesktop.systemd1.Unit",
3259                         "ActiveState",
3260                         &error,
3261                         &reply,
3262                         "s");
3263         if (r < 0) {
3264                 /* systemd might have droppped off momentarily, let's
3265                  * not make this an error */
3266                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3267                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3268                         return true;
3269
3270                 /* If the unit is already unloaded then it's not
3271                  * active */
3272                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3273                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3274                         return false;
3275
3276                 return r;
3277         }
3278
3279         r = sd_bus_message_read(reply, "s", &state);
3280         if (r < 0)
3281                 return -EINVAL;
3282
3283         return !streq(state, "inactive") && !streq(state, "failed");
3284 }
3285
3286 int manager_job_is_active(Manager *manager, const char *path) {
3287         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3288         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3289         int r;
3290
3291         assert(manager);
3292         assert(path);
3293
3294         r = sd_bus_get_property(
3295                         manager->bus,
3296                         "org.freedesktop.systemd1",
3297                         path,
3298                         "org.freedesktop.systemd1.Job",
3299                         "State",
3300                         &error,
3301                         &reply,
3302                         "s");
3303         if (r < 0) {
3304                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3305                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3306                         return true;
3307
3308                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3309                         return false;
3310
3311                 return r;
3312         }
3313
3314         /* We don't actually care about the state really. The fact
3315          * that we could read the job state is enough for us */
3316
3317         return true;
3318 }
3319 #endif // 0