src/login/logind-dbus.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2011 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <pwd.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include "sd-messages.h"
  26
  27 #include "alloc-util.h"
  28 #include "audit-util.h"
  29 #include "bus-common-errors.h"
  30 #include "bus-error.h"
  31 #include "bus-util.h"
  32 #include "dirent-util.h"
  33 //#include "efivars.h"
  34 #include "escape.h"
  35 #include "fd-util.h"
  36 #include "fileio-label.h"
  37 #include "formats-util.h"
  38 #include "fs-util.h"
  39 #include "logind.h"
  40 #include "mkdir.h"
  41 #include "path-util.h"
  42 #include "process-util.h"
  43 #include "selinux-util.h"
  44 #include "sleep-config.h"
  45 //#include "special.h"
  46 #include "strv.h"
  47 #include "terminal-util.h"
  48 #include "udev-util.h"
  49 #include "unit-name.h"
  50 #include "user-util.h"
  51 #include "utmp-wtmp.h"
  52
  53 /// Additional includes needed by elogind
  54 #include "update-utmp.h"
  55
  56 #if 1 /// elogind needs this prototype
  57 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active);
  58 #endif // 1
  59
  60 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  61         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  62         Session *session;
  63         int r;
  64
  65         assert(m);
  66         assert(message);
  67         assert(ret);
  68
  69         if (isempty(name)) {
  70                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  71                 if (r < 0)
  72                         return r;
  73
  74                 r = sd_bus_creds_get_session(creds, &name);
  75                 if (r < 0)
  76                         return r;
  77         }
  78
  79         session = hashmap_get(m->sessions, name);
  80         if (!session)
  81                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  82
  83         *ret = session;
  84         return 0;
  85 }
  86
  87 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
  88         User *user;
  89         int r;
  90
  91         assert(m);
  92         assert(message);
  93         assert(ret);
  94
  95         if (uid == UID_INVALID) {
  96                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  97
  98                 /* Note that we get the owner UID of the session, not the actual client UID here! */
  99                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 100                 if (r < 0)
 101                         return r;
 102
 103                 r = sd_bus_creds_get_owner_uid(creds, &uid);
 104                 if (r < 0)
 105                         return r;
 106         }
 107
 108         user = hashmap_get(m->users, UID_TO_PTR(uid));
 109         if (!user)
 110                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid);
 111
 112         *ret = user;
 113         return 0;
 114 }
 115
 116 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 117         Seat *seat;
 118         int r;
 119
 120         assert(m);
 121         assert(message);
 122         assert(ret);
 123
 124         if (isempty(name)) {
 125                 Session *session;
 126
 127                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 128                 if (r < 0)
 129                         return r;
 130
 131                 seat = session->seat;
 132                 if (!seat)
 133                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 134         } else {
 135                 seat = hashmap_get(m->seats, name);
 136                 if (!seat)
 137                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 138         }
 139
 140         *ret = seat;
 141         return 0;
 142 }
 143
 144 static int property_get_idle_hint(
 145                 sd_bus *bus,
 146                 const char *path,
 147                 const char *interface,
 148                 const char *property,
 149                 sd_bus_message *reply,
 150                 void *userdata,
 151                 sd_bus_error *error) {
 152
 153         Manager *m = userdata;
 154
 155         assert(bus);
 156         assert(reply);
 157         assert(m);
 158
 159         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 160 }
 161
 162 static int property_get_idle_since_hint(
 163                 sd_bus *bus,
 164                 const char *path,
 165                 const char *interface,
 166                 const char *property,
 167                 sd_bus_message *reply,
 168                 void *userdata,
 169                 sd_bus_error *error) {
 170
 171         Manager *m = userdata;
 172         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 173
 174         assert(bus);
 175         assert(reply);
 176         assert(m);
 177
 178         manager_get_idle_hint(m, &t);
 179
 180         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 181 }
 182
 183 static int property_get_inhibited(
 184                 sd_bus *bus,
 185                 const char *path,
 186                 const char *interface,
 187                 const char *property,
 188                 sd_bus_message *reply,
 189                 void *userdata,
 190                 sd_bus_error *error) {
 191
 192         Manager *m = userdata;
 193         InhibitWhat w;
 194
 195         assert(bus);
 196         assert(reply);
 197         assert(m);
 198
 199         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 200
 201         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 202 }
 203
 204 static int property_get_preparing(
 205                 sd_bus *bus,
 206                 const char *path,
 207                 const char *interface,
 208                 const char *property,
 209                 sd_bus_message *reply,
 210                 void *userdata,
 211                 sd_bus_error *error) {
 212
 213         Manager *m = userdata;
 214         bool b;
 215
 216         assert(bus);
 217         assert(reply);
 218         assert(m);
 219
 220         if (streq(property, "PreparingForShutdown"))
 221                 b = !!(m->action_what & INHIBIT_SHUTDOWN);
 222         else
 223                 b = !!(m->action_what & INHIBIT_SLEEP);
 224
 225         return sd_bus_message_append(reply, "b", b);
 226 }
 227
 228 static int property_get_scheduled_shutdown(
 229                 sd_bus *bus,
 230                 const char *path,
 231                 const char *interface,
 232                 const char *property,
 233                 sd_bus_message *reply,
 234                 void *userdata,
 235                 sd_bus_error *error) {
 236
 237         Manager *m = userdata;
 238         int r;
 239
 240         assert(bus);
 241         assert(reply);
 242         assert(m);
 243
 244         r = sd_bus_message_open_container(reply, 'r', "st");
 245         if (r < 0)
 246                 return r;
 247
 248         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 249         if (r < 0)
 250                 return r;
 251
 252         return sd_bus_message_close_container(reply);
 253 }
 254
 255 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 256
 257 static int property_get_docked(
 258                 sd_bus *bus,
 259                 const char *path,
 260                 const char *interface,
 261                 const char *property,
 262                 sd_bus_message *reply,
 263                 void *userdata,
 264                 sd_bus_error *error) {
 265
 266         Manager *m = userdata;
 267
 268         assert(bus);
 269         assert(reply);
 270         assert(m);
 271
 272         return sd_bus_message_append(reply, "b", manager_is_docked_or_external_displays(m));
 273 }
 274
 275 static int property_get_current_sessions(
 276                 sd_bus *bus,
 277                 const char *path,
 278                 const char *interface,
 279                 const char *property,
 280                 sd_bus_message *reply,
 281                 void *userdata,
 282                 sd_bus_error *error) {
 283
 284         Manager *m = userdata;
 285
 286         assert(bus);
 287         assert(reply);
 288         assert(m);
 289
 290         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->sessions));
 291 }
 292
 293 static int property_get_current_inhibitors(
 294                 sd_bus *bus,
 295                 const char *path,
 296                 const char *interface,
 297                 const char *property,
 298                 sd_bus_message *reply,
 299                 void *userdata,
 300                 sd_bus_error *error) {
 301
 302         Manager *m = userdata;
 303
 304         assert(bus);
 305         assert(reply);
 306         assert(m);
 307
 308         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->inhibitors));
 309 }
 310
 311 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 312         _cleanup_free_ char *p = NULL;
 313         Manager *m = userdata;
 314         const char *name;
 315         Session *session;
 316         int r;
 317
 318         assert(message);
 319         assert(m);
 320
 321         r = sd_bus_message_read(message, "s", &name);
 322         if (r < 0)
 323                 return r;
 324
 325         r = manager_get_session_from_creds(m, message, name, error, &session);
 326         if (r < 0)
 327                 return r;
 328
 329         p = session_bus_path(session);
 330         if (!p)
 331                 return -ENOMEM;
 332
 333         return sd_bus_reply_method_return(message, "o", p);
 334 }
 335
 336 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 337         _cleanup_free_ char *p = NULL;
 338         Session *session = NULL;
 339         Manager *m = userdata;
 340         pid_t pid;
 341         int r;
 342
 343         assert(message);
 344         assert(m);
 345
 346         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 347
 348         r = sd_bus_message_read(message, "u", &pid);
 349         if (r < 0)
 350                 return r;
 351         if (pid < 0)
 352                 return -EINVAL;
 353
 354         if (pid == 0) {
 355                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 356                 if (r < 0)
 357                         return r;
 358         } else {
 359                 r = manager_get_session_by_pid(m, pid, &session);
 360                 if (r < 0)
 361                         return r;
 362
 363                 if (!session)
 364                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 365         }
 366
 367         p = session_bus_path(session);
 368         if (!p)
 369                 return -ENOMEM;
 370
 371         return sd_bus_reply_method_return(message, "o", p);
 372 }
 373
 374 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 375         _cleanup_free_ char *p = NULL;
 376         Manager *m = userdata;
 377         uint32_t uid;
 378         User *user;
 379         int r;
 380
 381         assert(message);
 382         assert(m);
 383
 384         r = sd_bus_message_read(message, "u", &uid);
 385         if (r < 0)
 386                 return r;
 387
 388         r = manager_get_user_from_creds(m, message, uid, error, &user);
 389         if (r < 0)
 390                 return r;
 391
 392         p = user_bus_path(user);
 393         if (!p)
 394                 return -ENOMEM;
 395
 396         return sd_bus_reply_method_return(message, "o", p);
 397 }
 398
 399 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 400         _cleanup_free_ char *p = NULL;
 401         Manager *m = userdata;
 402         User *user = NULL;
 403         pid_t pid;
 404         int r;
 405
 406         assert(message);
 407         assert(m);
 408
 409         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 410
 411         r = sd_bus_message_read(message, "u", &pid);
 412         if (r < 0)
 413                 return r;
 414         if (pid < 0)
 415                 return -EINVAL;
 416
 417         if (pid == 0) {
 418                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 419                 if (r < 0)
 420                         return r;
 421         } else {
 422                 r = manager_get_user_by_pid(m, pid, &user);
 423                 if (r < 0)
 424                         return r;
 425                 if (!user)
 426                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "PID "PID_FMT" does not belong to any known or logged in user", pid);
 427         }
 428
 429         p = user_bus_path(user);
 430         if (!p)
 431                 return -ENOMEM;
 432
 433         return sd_bus_reply_method_return(message, "o", p);
 434 }
 435
 436 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 437         _cleanup_free_ char *p = NULL;
 438         Manager *m = userdata;
 439         const char *name;
 440         Seat *seat;
 441         int r;
 442
 443         assert(message);
 444         assert(m);
 445
 446         r = sd_bus_message_read(message, "s", &name);
 447         if (r < 0)
 448                 return r;
 449
 450         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 451         if (r < 0)
 452                 return r;
 453
 454         p = seat_bus_path(seat);
 455         if (!p)
 456                 return -ENOMEM;
 457
 458         return sd_bus_reply_method_return(message, "o", p);
 459 }
 460
 461 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 462         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 463         Manager *m = userdata;
 464         Session *session;
 465         Iterator i;
 466         int r;
 467
 468         assert(message);
 469         assert(m);
 470
 471         r = sd_bus_message_new_method_return(message, &reply);
 472         if (r < 0)
 473                 return r;
 474
 475         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 476         if (r < 0)
 477                 return r;
 478
 479         HASHMAP_FOREACH(session, m->sessions, i) {
 480                 _cleanup_free_ char *p = NULL;
 481
 482                 p = session_bus_path(session);
 483                 if (!p)
 484                         return -ENOMEM;
 485
 486                 r = sd_bus_message_append(reply, "(susso)",
 487                                           session->id,
 488                                           (uint32_t) session->user->uid,
 489                                           session->user->name,
 490                                           session->seat ? session->seat->id : "",
 491                                           p);
 492                 if (r < 0)
 493                         return r;
 494         }
 495
 496         r = sd_bus_message_close_container(reply);
 497         if (r < 0)
 498                 return r;
 499
 500         return sd_bus_send(NULL, reply, NULL);
 501 }
 502
 503 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 504         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 505         Manager *m = userdata;
 506         User *user;
 507         Iterator i;
 508         int r;
 509
 510         assert(message);
 511         assert(m);
 512
 513         r = sd_bus_message_new_method_return(message, &reply);
 514         if (r < 0)
 515                 return r;
 516
 517         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 518         if (r < 0)
 519                 return r;
 520
 521         HASHMAP_FOREACH(user, m->users, i) {
 522                 _cleanup_free_ char *p = NULL;
 523
 524                 p = user_bus_path(user);
 525                 if (!p)
 526                         return -ENOMEM;
 527
 528                 r = sd_bus_message_append(reply, "(uso)",
 529                                           (uint32_t) user->uid,
 530                                           user->name,
 531                                           p);
 532                 if (r < 0)
 533                         return r;
 534         }
 535
 536         r = sd_bus_message_close_container(reply);
 537         if (r < 0)
 538                 return r;
 539
 540         return sd_bus_send(NULL, reply, NULL);
 541 }
 542
 543 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 544         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 545         Manager *m = userdata;
 546         Seat *seat;
 547         Iterator i;
 548         int r;
 549
 550         assert(message);
 551         assert(m);
 552
 553         r = sd_bus_message_new_method_return(message, &reply);
 554         if (r < 0)
 555                 return r;
 556
 557         r = sd_bus_message_open_container(reply, 'a', "(so)");
 558         if (r < 0)
 559                 return r;
 560
 561         HASHMAP_FOREACH(seat, m->seats, i) {
 562                 _cleanup_free_ char *p = NULL;
 563
 564                 p = seat_bus_path(seat);
 565                 if (!p)
 566                         return -ENOMEM;
 567
 568                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 569                 if (r < 0)
 570                         return r;
 571         }
 572
 573         r = sd_bus_message_close_container(reply);
 574         if (r < 0)
 575                 return r;
 576
 577         return sd_bus_send(NULL, reply, NULL);
 578 }
 579
 580 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 581         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 582         Manager *m = userdata;
 583         Inhibitor *inhibitor;
 584         Iterator i;
 585         int r;
 586
 587         assert(message);
 588         assert(m);
 589
 590         r = sd_bus_message_new_method_return(message, &reply);
 591         if (r < 0)
 592                 return r;
 593
 594         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 595         if (r < 0)
 596                 return r;
 597
 598         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 599
 600                 r = sd_bus_message_append(reply, "(ssssuu)",
 601                                           strempty(inhibit_what_to_string(inhibitor->what)),
 602                                           strempty(inhibitor->who),
 603                                           strempty(inhibitor->why),
 604                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 605                                           (uint32_t) inhibitor->uid,
 606                                           (uint32_t) inhibitor->pid);
 607                 if (r < 0)
 608                         return r;
 609         }
 610
 611         r = sd_bus_message_close_container(reply);
 612         if (r < 0)
 613                 return r;
 614
 615         return sd_bus_send(NULL, reply, NULL);
 616 }
 617
 618 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 619         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 620         uint32_t audit_id = 0;
 621         _cleanup_free_ char *id = NULL;
 622         Session *session = NULL;
 623         Manager *m = userdata;
 624         User *user = NULL;
 625         Seat *seat = NULL;
 626         pid_t leader;
 627         uid_t uid;
 628         int remote;
 629         uint32_t vtnr = 0;
 630         SessionType t;
 631         SessionClass c;
 632         int r;
 633
 634         assert(message);
 635         assert(m);
 636
 637         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 638         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 639
 640         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 641         if (r < 0)
 642                 return r;
 643
 644         if (!uid_is_valid(uid))
 645                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 646         if (leader < 0 || leader == 1)
 647                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 648
 649         if (isempty(type))
 650                 t = _SESSION_TYPE_INVALID;
 651         else {
 652                 t = session_type_from_string(type);
 653                 if (t < 0)
 654                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 655         }
 656
 657         if (isempty(class))
 658                 c = _SESSION_CLASS_INVALID;
 659         else {
 660                 c = session_class_from_string(class);
 661                 if (c < 0)
 662                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 663         }
 664
 665         if (isempty(desktop))
 666                 desktop = NULL;
 667         else {
 668                 if (!string_is_safe(desktop))
 669                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 670         }
 671
 672         if (isempty(cseat))
 673                 seat = NULL;
 674         else {
 675                 seat = hashmap_get(m->seats, cseat);
 676                 if (!seat)
 677                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 678         }
 679
 680         if (tty_is_vc(tty)) {
 681                 int v;
 682
 683                 if (!seat)
 684                         seat = m->seat0;
 685                 else if (seat != m->seat0)
 686                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 687
 688                 v = vtnr_from_tty(tty);
 689                 if (v <= 0)
 690                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 691
 692                 if (!vtnr)
 693                         vtnr = (uint32_t) v;
 694                 else if (vtnr != (uint32_t) v)
 695                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 696
 697         } else if (tty_is_console(tty)) {
 698
 699                 if (!seat)
 700                         seat = m->seat0;
 701                 else if (seat != m->seat0)
 702                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 703
 704                 if (vtnr != 0)
 705                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 706         }
 707
 708         if (seat) {
 709                 if (seat_has_vts(seat)) {
 710                         if (!vtnr || vtnr > 63)
 711                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 712                 } else {
 713                         if (vtnr != 0)
 714                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 715                 }
 716         }
 717
 718         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 719         if (r < 0)
 720                 return r;
 721
 722         if (t == _SESSION_TYPE_INVALID) {
 723                 if (!isempty(display))
 724                         t = SESSION_X11;
 725                 else if (!isempty(tty))
 726                         t = SESSION_TTY;
 727                 else
 728                         t = SESSION_UNSPECIFIED;
 729         }
 730
 731         if (c == _SESSION_CLASS_INVALID) {
 732                 if (t == SESSION_UNSPECIFIED)
 733                         c = SESSION_BACKGROUND;
 734                 else
 735                         c = SESSION_USER;
 736         }
 737
 738         if (leader == 0) {
 739                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 740
 741                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 742                 if (r < 0)
 743                         return r;
 744
 745                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 746                 if (r < 0)
 747                         return r;
 748         }
 749
 750         r = manager_get_session_by_pid(m, leader, NULL);
 751         if (r > 0)
 752                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session");
 753
 754         /*
 755          * Old gdm and lightdm start the user-session on the same VT as
 756          * the greeter session. But they destroy the greeter session
 757          * after the user-session and want the user-session to take
 758          * over the VT. We need to support this for
 759          * backwards-compatibility, so make sure we allow new sessions
 760          * on a VT that a greeter is running on. Furthermore, to allow
 761          * re-logins, we have to allow a greeter to take over a used VT for
 762          * the exact same reasons.
 763          */
 764         if (c != SESSION_GREETER &&
 765             vtnr > 0 &&
 766             vtnr < m->seat0->position_count &&
 767             m->seat0->positions[vtnr] &&
 768             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 769                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 770
 771         if (hashmap_size(m->sessions) >= m->sessions_max)
 772                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 773
 774         audit_session_from_pid(leader, &audit_id);
 775         if (audit_id > 0) {
 776                 /* Keep our session IDs and the audit session IDs in sync */
 777
 778                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 779                         return -ENOMEM;
 780
 781                 /* Wut? There's already a session by this name and we
 782                  * didn't find it above? Weird, then let's not trust
 783                  * the audit data and let's better register a new
 784                  * ID */
 785                 if (hashmap_get(m->sessions, id)) {
 786                         log_warning("Existing logind session ID %s used by new audit session, ignoring", id);
 787                         audit_id = 0;
 788
 789                         id = mfree(id);
 790                 }
 791         }
 792
 793         if (!id) {
 794                 do {
 795                         id = mfree(id);
 796
 797                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 798                                 return -ENOMEM;
 799
 800                 } while (hashmap_get(m->sessions, id));
 801         }
 802
 803         r = manager_add_user_by_uid(m, uid, &user);
 804         if (r < 0)
 805                 goto fail;
 806
 807         r = manager_add_session(m, id, &session);
 808         if (r < 0)
 809                 goto fail;
 810
 811         session_set_user(session, user);
 812
 813         session->leader = leader;
 814         session->audit_id = audit_id;
 815         session->type = t;
 816         session->class = c;
 817         session->remote = remote;
 818         session->vtnr = vtnr;
 819
 820         if (!isempty(tty)) {
 821                 session->tty = strdup(tty);
 822                 if (!session->tty) {
 823                         r = -ENOMEM;
 824                         goto fail;
 825                 }
 826         }
 827
 828         if (!isempty(display)) {
 829                 session->display = strdup(display);
 830                 if (!session->display) {
 831                         r = -ENOMEM;
 832                         goto fail;
 833                 }
 834         }
 835
 836         if (!isempty(remote_user)) {
 837                 session->remote_user = strdup(remote_user);
 838                 if (!session->remote_user) {
 839                         r = -ENOMEM;
 840                         goto fail;
 841                 }
 842         }
 843
 844         if (!isempty(remote_host)) {
 845                 session->remote_host = strdup(remote_host);
 846                 if (!session->remote_host) {
 847                         r = -ENOMEM;
 848                         goto fail;
 849                 }
 850         }
 851
 852         if (!isempty(service)) {
 853                 session->service = strdup(service);
 854                 if (!session->service) {
 855                         r = -ENOMEM;
 856                         goto fail;
 857                 }
 858         }
 859
 860         if (!isempty(desktop)) {
 861                 session->desktop = strdup(desktop);
 862                 if (!session->desktop) {
 863                         r = -ENOMEM;
 864                         goto fail;
 865                 }
 866         }
 867
 868         if (seat) {
 869                 r = seat_attach_session(seat, session);
 870                 if (r < 0)
 871                         goto fail;
 872         }
 873
 874         r = session_start(session);
 875         if (r < 0)
 876                 goto fail;
 877
 878         session->create_message = sd_bus_message_ref(message);
 879
 880 #if 0 /// UNNEEDED by elogind
 881         /* Now, let's wait until the slice unit and stuff got
 882          * created. We send the reply back from
 883          * session_send_create_reply(). */
 884 #else
 885         /* We reply directly. */
 886
 887         r = session_send_create_reply(session, NULL);
 888         if (r < 0)
 889                 goto fail;
 890 #endif // 0
 891
 892         return 1;
 893
 894 fail:
 895         if (session)
 896                 session_add_to_gc_queue(session);
 897
 898         if (user)
 899                 user_add_to_gc_queue(user);
 900
 901         return r;
 902 }
 903
 904 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 905         Manager *m = userdata;
 906         Session *session;
 907         const char *name;
 908         int r;
 909
 910         assert(message);
 911         assert(m);
 912
 913         r = sd_bus_message_read(message, "s", &name);
 914         if (r < 0)
 915                 return r;
 916
 917         r = manager_get_session_from_creds(m, message, name, error, &session);
 918         if (r < 0)
 919                 return r;
 920
 921         r = session_release(session);
 922         if (r < 0)
 923                 return r;
 924
 925 #if 1 /// elogind must queue this session
 926         session_add_to_gc_queue(session);
 927 #endif // 1
 928
 929         return sd_bus_reply_method_return(message, NULL);
 930 }
 931
 932 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 933         Manager *m = userdata;
 934         Session *session;
 935         const char *name;
 936         int r;
 937
 938         assert(message);
 939         assert(m);
 940
 941         r = sd_bus_message_read(message, "s", &name);
 942         if (r < 0)
 943                 return r;
 944
 945         r = manager_get_session_from_creds(m, message, name, error, &session);
 946         if (r < 0)
 947                 return r;
 948
 949         return bus_session_method_activate(message, session, error);
 950 }
 951
 952 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 953         const char *session_name, *seat_name;
 954         Manager *m = userdata;
 955         Session *session;
 956         Seat *seat;
 957         int r;
 958
 959         assert(message);
 960         assert(m);
 961
 962         /* Same as ActivateSession() but refuses to work if
 963          * the seat doesn't match */
 964
 965         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 966         if (r < 0)
 967                 return r;
 968
 969         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 970         if (r < 0)
 971                 return r;
 972
 973         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 974         if (r < 0)
 975                 return r;
 976
 977         if (session->seat != seat)
 978                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 979
 980         r = session_activate(session);
 981         if (r < 0)
 982                 return r;
 983
 984         return sd_bus_reply_method_return(message, NULL);
 985 }
 986
 987 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 988         Manager *m = userdata;
 989         Session *session;
 990         const char *name;
 991         int r;
 992
 993         assert(message);
 994         assert(m);
 995
 996         r = sd_bus_message_read(message, "s", &name);
 997         if (r < 0)
 998                 return r;
 999
1000         r = manager_get_session_from_creds(m, message, name, error, &session);
1001         if (r < 0)
1002                 return r;
1003
1004         return bus_session_method_lock(message, session, error);
1005 }
1006
1007 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1008         Manager *m = userdata;
1009         int r;
1010
1011         assert(message);
1012         assert(m);
1013
1014         r = bus_verify_polkit_async(
1015                         message,
1016                         CAP_SYS_ADMIN,
1017                         "org.freedesktop.login1.lock-sessions",
1018                         NULL,
1019                         false,
1020                         UID_INVALID,
1021                         &m->polkit_registry,
1022                         error);
1023         if (r < 0)
1024                 return r;
1025         if (r == 0)
1026                 return 1; /* Will call us back */
1027
1028         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1029         if (r < 0)
1030                 return r;
1031
1032         return sd_bus_reply_method_return(message, NULL);
1033 }
1034
1035 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1036         const char *name;
1037         Manager *m = userdata;
1038         Session *session;
1039         int r;
1040
1041         assert(message);
1042         assert(m);
1043
1044         r = sd_bus_message_read(message, "s", &name);
1045         if (r < 0)
1046                 return r;
1047
1048         r = manager_get_session_from_creds(m, message, name, error, &session);
1049         if (r < 0)
1050                 return r;
1051
1052         return bus_session_method_kill(message, session, error);
1053 }
1054
1055 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1056         Manager *m = userdata;
1057         uint32_t uid;
1058         User *user;
1059         int r;
1060
1061         assert(message);
1062         assert(m);
1063
1064         r = sd_bus_message_read(message, "u", &uid);
1065         if (r < 0)
1066                 return r;
1067
1068         r = manager_get_user_from_creds(m, message, uid, error, &user);
1069         if (r < 0)
1070                 return r;
1071
1072         return bus_user_method_kill(message, user, error);
1073 }
1074
1075 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1076         Manager *m = userdata;
1077         const char *name;
1078         Session *session;
1079         int r;
1080
1081         assert(message);
1082         assert(m);
1083
1084         r = sd_bus_message_read(message, "s", &name);
1085         if (r < 0)
1086                 return r;
1087
1088         r = manager_get_session_from_creds(m, message, name, error, &session);
1089         if (r < 0)
1090                 return r;
1091
1092         return bus_session_method_terminate(message, session, error);
1093 }
1094
1095 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1096         Manager *m = userdata;
1097         uint32_t uid;
1098         User *user;
1099         int r;
1100
1101         assert(message);
1102         assert(m);
1103
1104         r = sd_bus_message_read(message, "u", &uid);
1105         if (r < 0)
1106                 return r;
1107
1108         r = manager_get_user_from_creds(m, message, uid, error, &user);
1109         if (r < 0)
1110                 return r;
1111
1112         return bus_user_method_terminate(message, user, error);
1113 }
1114
1115 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1116         Manager *m = userdata;
1117         const char *name;
1118         Seat *seat;
1119         int r;
1120
1121         assert(message);
1122         assert(m);
1123
1124         r = sd_bus_message_read(message, "s", &name);
1125         if (r < 0)
1126                 return r;
1127
1128         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1129         if (r < 0)
1130                 return r;
1131
1132         return bus_seat_method_terminate(message, seat, error);
1133 }
1134
1135 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1136         _cleanup_free_ char *cc = NULL;
1137         Manager *m = userdata;
1138         int r, b, interactive;
1139         struct passwd *pw;
1140         const char *path;
1141         uint32_t uid;
1142         bool self = false;
1143
1144         assert(message);
1145         assert(m);
1146
1147         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1148         if (r < 0)
1149                 return r;
1150
1151         if (uid == UID_INVALID) {
1152                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1153
1154                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1155                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1156                 if (r < 0)
1157                         return r;
1158
1159                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1160                 if (r < 0)
1161                         return r;
1162
1163                 self = true;
1164
1165         } else if (!uid_is_valid(uid))
1166                 return -EINVAL;
1167
1168         errno = 0;
1169         pw = getpwuid(uid);
1170         if (!pw)
1171                 return errno > 0 ? -errno : -ENOENT;
1172
1173         r = bus_verify_polkit_async(
1174                         message,
1175                         CAP_SYS_ADMIN,
1176                         self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger",
1177                         NULL,
1178                         interactive,
1179                         UID_INVALID,
1180                         &m->polkit_registry,
1181                         error);
1182         if (r < 0)
1183                 return r;
1184         if (r == 0)
1185                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1186
1187         mkdir_p_label("/var/lib/systemd", 0755);
1188
1189         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1190         if (r < 0)
1191                 return r;
1192
1193         cc = cescape(pw->pw_name);
1194         if (!cc)
1195                 return -ENOMEM;
1196
1197         path = strjoina("/var/lib/systemd/linger/", cc);
1198         if (b) {
1199                 User *u;
1200
1201                 r = touch(path);
1202                 if (r < 0)
1203                         return r;
1204
1205                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1206                         user_start(u);
1207
1208         } else {
1209                 User *u;
1210
1211                 r = unlink(path);
1212                 if (r < 0 && errno != ENOENT)
1213                         return -errno;
1214
1215                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1216                 if (u)
1217                         user_add_to_gc_queue(u);
1218         }
1219
1220         return sd_bus_reply_method_return(message, NULL);
1221 }
1222
1223 static int trigger_device(Manager *m, struct udev_device *d) {
1224         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1225         struct udev_list_entry *first, *item;
1226         int r;
1227
1228         assert(m);
1229
1230         e = udev_enumerate_new(m->udev);
1231         if (!e)
1232                 return -ENOMEM;
1233
1234         if (d) {
1235                 r = udev_enumerate_add_match_parent(e, d);
1236                 if (r < 0)
1237                         return r;
1238         }
1239
1240         r = udev_enumerate_scan_devices(e);
1241         if (r < 0)
1242                 return r;
1243
1244         first = udev_enumerate_get_list_entry(e);
1245         udev_list_entry_foreach(item, first) {
1246                 _cleanup_free_ char *t = NULL;
1247                 const char *p;
1248
1249                 p = udev_list_entry_get_name(item);
1250
1251                 t = strappend(p, "/uevent");
1252                 if (!t)
1253                         return -ENOMEM;
1254
1255                 write_string_file(t, "change", WRITE_STRING_FILE_CREATE);
1256         }
1257
1258         return 0;
1259 }
1260
1261 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1262         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1263         _cleanup_free_ char *rule = NULL, *file = NULL;
1264         const char *id_for_seat;
1265         int r;
1266
1267         assert(m);
1268         assert(seat);
1269         assert(sysfs);
1270
1271         d = udev_device_new_from_syspath(m->udev, sysfs);
1272         if (!d)
1273                 return -ENODEV;
1274
1275         if (!udev_device_has_tag(d, "seat"))
1276                 return -ENODEV;
1277
1278         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1279         if (!id_for_seat)
1280                 return -ENODEV;
1281
1282         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1283                 return -ENOMEM;
1284
1285         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1286                 return -ENOMEM;
1287
1288         mkdir_p_label("/etc/udev/rules.d", 0755);
1289         r = write_string_file_atomic_label(file, rule);
1290         if (r < 0)
1291                 return r;
1292
1293         return trigger_device(m, d);
1294 }
1295
1296 static int flush_devices(Manager *m) {
1297         _cleanup_closedir_ DIR *d;
1298
1299         assert(m);
1300
1301         d = opendir("/etc/udev/rules.d");
1302         if (!d) {
1303                 if (errno != ENOENT)
1304                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1305         } else {
1306                 struct dirent *de;
1307
1308                 while ((de = readdir(d))) {
1309
1310                         if (!dirent_is_file(de))
1311                                 continue;
1312
1313                         if (!startswith(de->d_name, "72-seat-"))
1314                                 continue;
1315
1316                         if (!endswith(de->d_name, ".rules"))
1317                                 continue;
1318
1319                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1320                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1321                 }
1322         }
1323
1324         return trigger_device(m, NULL);
1325 }
1326
1327 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1328         const char *sysfs, *seat;
1329         Manager *m = userdata;
1330         int interactive, r;
1331
1332         assert(message);
1333         assert(m);
1334
1335         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1336         if (r < 0)
1337                 return r;
1338
1339         if (!path_startswith(sysfs, "/sys"))
1340                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1341
1342         if (!seat_name_is_valid(seat))
1343                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1344
1345         r = bus_verify_polkit_async(
1346                         message,
1347                         CAP_SYS_ADMIN,
1348                         "org.freedesktop.login1.attach-device",
1349                         NULL,
1350                         interactive,
1351                         UID_INVALID,
1352                         &m->polkit_registry,
1353                         error);
1354         if (r < 0)
1355                 return r;
1356         if (r == 0)
1357                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1358
1359         r = attach_device(m, seat, sysfs);
1360         if (r < 0)
1361                 return r;
1362
1363         return sd_bus_reply_method_return(message, NULL);
1364 }
1365
1366 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1367         Manager *m = userdata;
1368         int interactive, r;
1369
1370         assert(message);
1371         assert(m);
1372
1373         r = sd_bus_message_read(message, "b", &interactive);
1374         if (r < 0)
1375                 return r;
1376
1377         r = bus_verify_polkit_async(
1378                         message,
1379                         CAP_SYS_ADMIN,
1380                         "org.freedesktop.login1.flush-devices",
1381                         NULL,
1382                         interactive,
1383                         UID_INVALID,
1384                         &m->polkit_registry,
1385                         error);
1386         if (r < 0)
1387                 return r;
1388         if (r == 0)
1389                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1390
1391         r = flush_devices(m);
1392         if (r < 0)
1393                 return r;
1394
1395         return sd_bus_reply_method_return(message, NULL);
1396 }
1397
1398 static int have_multiple_sessions(
1399                 Manager *m,
1400                 uid_t uid) {
1401
1402         Session *session;
1403         Iterator i;
1404
1405         assert(m);
1406
1407         /* Check for other users' sessions. Greeter sessions do not
1408          * count, and non-login sessions do not count either. */
1409         HASHMAP_FOREACH(session, m->sessions, i)
1410                 if (session->class == SESSION_USER &&
1411                     session->user->uid != uid)
1412                         return true;
1413
1414         return false;
1415 }
1416
1417 static int bus_manager_log_shutdown(
1418                 Manager *m,
1419                 InhibitWhat w,
1420 #if 0 /// elogind does not support systemd units
1421                 const char *unit_name) {
1422
1423         const char *p, *q;
1424
1425         assert(m);
1426         assert(unit_name);
1427
1428         if (w != INHIBIT_SHUTDOWN)
1429                 return 0;
1430
1431         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1432                 p = "MESSAGE=System is powering down";
1433                 q = "SHUTDOWN=power-off";
1434         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1435                 p = "MESSAGE=System is halting";
1436                 q = "SHUTDOWN=halt";
1437         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1438                 p = "MESSAGE=System is rebooting";
1439                 q = "SHUTDOWN=reboot";
1440         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1441                 p = "MESSAGE=System is rebooting with kexec";
1442                 q = "SHUTDOWN=kexec";
1443         } else {
1444                 p = "MESSAGE=System is shutting down";
1445                 q = NULL;
1446         }
1447 #else
1448                  HandleAction action) {
1449
1450          const char *p, *q;
1451
1452          assert(m);
1453
1454          if (w != INHIBIT_SHUTDOWN)
1455                  return 0;
1456
1457          switch (action) {
1458          case HANDLE_POWEROFF:
1459                  p = "MESSAGE=System is powering down.";
1460                  q = "SHUTDOWN=power-off";
1461                  break;
1462          case HANDLE_HALT:
1463                  p = "MESSAGE=System is halting.";
1464                  q = "SHUTDOWN=halt";
1465                  break;
1466          case HANDLE_REBOOT:
1467                  p = "MESSAGE=System is rebooting.";
1468                  q = "SHUTDOWN=reboot";
1469                  break;
1470          case HANDLE_KEXEC:
1471                  p = "MESSAGE=System is rebooting with kexec.";
1472                  q = "SHUTDOWN=kexec";
1473                  break;
1474          default:
1475                  p = "MESSAGE=System is shutting down.";
1476                  q = NULL;
1477          }
1478 #endif // 0
1479         if (isempty(m->wall_message))
1480                 p = strjoina(p, ".");
1481         else
1482                 p = strjoina(p, " (", m->wall_message, ").");
1483
1484         return log_struct(LOG_NOTICE,
1485                           LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
1486                           p,
1487                           q,
1488                           NULL);
1489 }
1490
1491 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1492         Manager *m = userdata;
1493
1494         assert(e);
1495         assert(m);
1496
1497         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1498         return 0;
1499 }
1500
1501 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1502         int r;
1503
1504         assert(m);
1505
1506         if (until <= now(CLOCK_MONOTONIC))
1507                 return 0;
1508
1509         /* We want to ignore the lid switch for a while after each
1510          * suspend, and after boot-up. Hence let's install a timer for
1511          * this. As long as the event source exists we ignore the lid
1512          * switch. */
1513
1514         if (m->lid_switch_ignore_event_source) {
1515                 usec_t u;
1516
1517                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1518                 if (r < 0)
1519                         return r;
1520
1521                 if (until <= u)
1522                         return 0;
1523
1524                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1525         } else
1526                 r = sd_event_add_time(
1527                                 m->event,
1528                                 &m->lid_switch_ignore_event_source,
1529                                 CLOCK_MONOTONIC,
1530                                 until, 0,
1531                                 lid_switch_ignore_handler, m);
1532
1533         return r;
1534 }
1535
1536 static void reset_scheduled_shutdown(Manager *m) {
1537         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1538         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1539         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1540         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1541         m->scheduled_shutdown_timeout = 0;
1542         m->shutdown_dry_run = false;
1543
1544         if (m->unlink_nologin) {
1545                 (void) unlink("/run/nologin");
1546                 m->unlink_nologin = false;
1547         }
1548 }
1549
1550 static int execute_shutdown_or_sleep(
1551                 Manager *m,
1552                 InhibitWhat w,
1553                 HandleAction action,
1554                 sd_bus_error *error) {
1555
1556 #if 0 /// elogind does not need these, we do it ourselves
1557         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1558         char *c = NULL;
1559         const char *p;
1560 #else
1561         /* needed for update-utmp */
1562         char** argv_utmp = NULL;
1563 #endif // 0
1564         int r;
1565
1566         assert(m);
1567         assert(w >= 0);
1568         assert(w < _INHIBIT_WHAT_MAX);
1569
1570         bus_manager_log_shutdown(m, w, action);
1571
1572 #if 0 /// elogind does it directly without depending on systemd running the system
1573         if (m->shutdown_dry_run) {
1574                 log_info("Running in dry run, suppressing action.");
1575                 reset_scheduled_shutdown(m);
1576         } else {
1577                 r = sd_bus_call_method(
1578                                 m->bus,
1579                                 "org.freedesktop.systemd1",
1580                                 "/org/freedesktop/systemd1",
1581                                 "org.freedesktop.systemd1.Manager",
1582                                 "StartUnit",
1583                                 error,
1584                                 &reply,
1585                                 "ss", unit_name, "replace-irreversibly");
1586                 if (r < 0)
1587                         return r;
1588
1589                 r = sd_bus_message_read(reply, "o", &p);
1590                 if (r < 0)
1591                         return r;
1592
1593                 c = strdup(p);
1594                 if (!c)
1595                         return -ENOMEM;
1596
1597                 m->action_unit = unit_name;
1598                 free(m->action_job);
1599                 m->action_job = c;
1600                 m->action_what = w;
1601         }
1602 #else
1603         if (IN_SET(action, HANDLE_HALT, HANDLE_POWEROFF, HANDLE_REBOOT)) {
1604
1605                 /* As we have no systemd update-utmp daemon running, we have to
1606                  * set the relevant utmp/wtmp entries ourselves.
1607                  */
1608
1609                 if (strv_extend(&argv_utmp, "elogind") < 0)
1610                         return log_oom();
1611
1612                 if (HANDLE_REBOOT == action) {
1613                         if (strv_extend(&argv_utmp, "reboot") < 0)
1614                                 return log_oom();
1615                 } else {
1616                         if (strv_extend(&argv_utmp, "shutdown") < 0)
1617                                 return log_oom();
1618                 }
1619
1620                  /* This comes from our patched update-utmp/update-utmp.c */
1621                 update_utmp(2, argv_utmp, m->bus);
1622                 strv_free(argv_utmp);
1623         }
1624
1625         /* Now perform the requested action */
1626         r = shutdown_or_sleep(m, action);
1627
1628         /* no more pending actions, whether this failed or not */
1629         m->pending_action = HANDLE_IGNORE;
1630
1631         /* As elogind can not rely on a systemd manager to call all
1632          * sleeping processes to wake up, we have to tell them all
1633          * by ourselves. */
1634         if (w == INHIBIT_SLEEP) {
1635                 send_prepare_for(m, w, false);
1636                 m->action_what = 0;
1637         } else
1638                 m->action_what = w;
1639
1640         if (r < 0)
1641                 return r;
1642 #endif // 0
1643
1644         /* Make sure the lid switch is ignored for a while */
1645         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1646
1647         return 0;
1648 }
1649
1650 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1651
1652         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1653         Inhibitor *offending = NULL;
1654         int r;
1655
1656         assert(manager);
1657
1658         if ( (0 == manager->action_what) || (HANDLE_IGNORE == manager->pending_action) )
1659                 return 0;
1660
1661         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1662                 _cleanup_free_ char *comm = NULL, *u = NULL;
1663
1664                 if (!timeout)
1665                         return 0;
1666
1667                 (void) get_process_comm(offending->pid, &comm);
1668                 u = uid_to_name(offending->uid);
1669
1670                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1671                            offending->uid, strna(u),
1672                            offending->pid, strna(comm));
1673         }
1674
1675         /* Actually do the operation */
1676         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->pending_action, &error);
1677         if (r < 0) {
1678                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1679
1680                 manager->pending_action = HANDLE_IGNORE;
1681                 manager->action_what    = 0;
1682                 return r;
1683         }
1684
1685         return 1;
1686 }
1687
1688 static int manager_inhibit_timeout_handler(
1689                         sd_event_source *s,
1690                         uint64_t usec,
1691                         void *userdata) {
1692
1693         Manager *manager = userdata;
1694         int r;
1695
1696         assert(manager);
1697         assert(manager->inhibit_timeout_source == s);
1698
1699         r = manager_dispatch_delayed(manager, true);
1700         return (r < 0) ? r : 0;
1701 }
1702
1703 static int delay_shutdown_or_sleep(
1704                 Manager *m,
1705                 InhibitWhat w,
1706                 HandleAction action) {
1707
1708         int r;
1709         usec_t timeout_val;
1710
1711         assert(m);
1712         assert(w >= 0);
1713         assert(w < _INHIBIT_WHAT_MAX);
1714
1715         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1716
1717         if (m->inhibit_timeout_source) {
1718                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1719                 if (r < 0)
1720                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1721
1722                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1723                 if (r < 0)
1724                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1725         } else {
1726                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1727                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1728                 if (r < 0)
1729                         return r;
1730         }
1731
1732         m->pending_action = action;
1733         m->action_what = w;
1734
1735         return 0;
1736 }
1737
1738 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1739
1740         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1741                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1742                 [INHIBIT_SLEEP] = "PrepareForSleep"
1743         };
1744
1745         int active = _active;
1746
1747         assert(m);
1748         assert(w >= 0);
1749         assert(w < _INHIBIT_WHAT_MAX);
1750         assert(signal_name[w]);
1751
1752         return sd_bus_emit_signal(m->bus,
1753                                   "/org/freedesktop/login1",
1754                                   "org.freedesktop.login1.Manager",
1755                                   signal_name[w],
1756                                   "b",
1757                                   active);
1758 }
1759
1760 int bus_manager_shutdown_or_sleep_now_or_later(
1761                 Manager *m,
1762                 HandleAction action,
1763                 InhibitWhat w,
1764                 sd_bus_error *error) {
1765
1766         bool delayed;
1767         int r;
1768
1769         assert(m);
1770         assert(w >= 0);
1771         assert(w <= _INHIBIT_WHAT_MAX);
1772
1773         /* Tell everybody to prepare for shutdown/sleep */
1774         send_prepare_for(m, w, true);
1775
1776         delayed =
1777                 m->inhibit_delay_max > 0 &&
1778                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1779
1780         log_debug_elogind("%s called for %s (%sdelayed)", __FUNCTION__,
1781                           handle_action_to_string(action),
1782                           delayed ? "" : "NOT ");
1783
1784         if (delayed)
1785                 /* Shutdown is delayed, keep in mind what we
1786                  * want to do, and start a timeout */
1787                 r = delay_shutdown_or_sleep(m, w, action);
1788         else
1789                 /* Shutdown is not delayed, execute it
1790                  * immediately */
1791                 r = execute_shutdown_or_sleep(m, w, action, error);
1792
1793         return r;
1794 }
1795
1796 static int verify_shutdown_creds(
1797                 Manager *m,
1798                 sd_bus_message *message,
1799                 InhibitWhat w,
1800                 bool interactive,
1801                 const char *action,
1802                 const char *action_multiple_sessions,
1803                 const char *action_ignore_inhibit,
1804                 sd_bus_error *error) {
1805
1806         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1807         bool multiple_sessions, blocked;
1808         uid_t uid;
1809         int r;
1810
1811         assert(m);
1812         assert(message);
1813         assert(w >= 0);
1814         assert(w <= _INHIBIT_WHAT_MAX);
1815
1816         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1817         if (r < 0)
1818                 return r;
1819
1820         r = sd_bus_creds_get_euid(creds, &uid);
1821         if (r < 0)
1822                 return r;
1823
1824         r = have_multiple_sessions(m, uid);
1825         if (r < 0)
1826                 return r;
1827
1828         multiple_sessions = r > 0;
1829         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1830
1831         if (multiple_sessions && action_multiple_sessions) {
1832                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1833                 if (r < 0)
1834                         return r;
1835                 if (r == 0)
1836                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1837         }
1838
1839         if (blocked && action_ignore_inhibit) {
1840                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1841                 if (r < 0)
1842                         return r;
1843                 if (r == 0)
1844                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1845         }
1846
1847         if (!multiple_sessions && !blocked && action) {
1848                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1849                 if (r < 0)
1850                         return r;
1851                 if (r == 0)
1852                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1853         }
1854
1855         return 0;
1856 }
1857
1858 static int method_do_shutdown_or_sleep(
1859                 Manager *m,
1860                 sd_bus_message *message,
1861                 HandleAction sleep_action,
1862                 InhibitWhat w,
1863                 const char *action,
1864                 const char *action_multiple_sessions,
1865                 const char *action_ignore_inhibit,
1866                 const char *sleep_verb,
1867                 sd_bus_error *error) {
1868
1869         int interactive, r;
1870
1871         assert(m);
1872         assert(message);
1873         assert(w >= 0);
1874         assert(w <= _INHIBIT_WHAT_MAX);
1875
1876         r = sd_bus_message_read(message, "b", &interactive);
1877         if (r < 0)
1878                 return r;
1879
1880         log_debug_elogind("%s called with action '%s', sleep '%s' (%sinteractive)",
1881                           __FUNCTION__, action, sleep_verb,
1882                           interactive ? "" : "NOT ");
1883
1884         /* Don't allow multiple jobs being executed at the same time */
1885         if (m->action_what)
1886                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1887
1888         if (sleep_verb) {
1889                 r = can_sleep(m, sleep_verb);
1890                 if (r < 0)
1891                         return r;
1892
1893                 if (r == 0)
1894                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1895         }
1896
1897         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1898                                   action_ignore_inhibit, error);
1899         log_debug_elogind("verify_shutdown_creds() returned %d", r);
1900         if (r != 0)
1901                 return r;
1902
1903         r = bus_manager_shutdown_or_sleep_now_or_later(m, sleep_action, w, error);
1904         if (r < 0)
1905                 return r;
1906
1907         return sd_bus_reply_method_return(message, NULL);
1908 }
1909
1910 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1911         Manager *m = userdata;
1912
1913         log_debug_elogind("%s called", __FUNCTION__);
1914
1915         return method_do_shutdown_or_sleep(
1916                         m, message,
1917                         HANDLE_POWEROFF,
1918                         INHIBIT_SHUTDOWN,
1919                         "org.freedesktop.login1.power-off",
1920                         "org.freedesktop.login1.power-off-multiple-sessions",
1921                         "org.freedesktop.login1.power-off-ignore-inhibit",
1922                         NULL,
1923                         error);
1924 }
1925
1926 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1927         Manager *m = userdata;
1928
1929         log_debug_elogind("%s called", __FUNCTION__);
1930
1931         return method_do_shutdown_or_sleep(
1932                         m, message,
1933                         HANDLE_REBOOT,
1934                         INHIBIT_SHUTDOWN,
1935                         "org.freedesktop.login1.reboot",
1936                         "org.freedesktop.login1.reboot-multiple-sessions",
1937                         "org.freedesktop.login1.reboot-ignore-inhibit",
1938                         NULL,
1939                         error);
1940 }
1941
1942 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1943         Manager *m = userdata;
1944
1945         log_debug_elogind("%s called", __FUNCTION__);
1946
1947         return method_do_shutdown_or_sleep(
1948                         m, message,
1949                         HANDLE_SUSPEND,
1950                         INHIBIT_SLEEP,
1951                         "org.freedesktop.login1.suspend",
1952                         "org.freedesktop.login1.suspend-multiple-sessions",
1953                         "org.freedesktop.login1.suspend-ignore-inhibit",
1954                         "suspend",
1955                         error);
1956 }
1957
1958 static int nologin_timeout_handler(
1959                         sd_event_source *s,
1960                         uint64_t usec,
1961                         void *userdata) {
1962
1963         Manager *m = userdata;
1964         int r;
1965
1966         log_info("Creating /run/nologin, blocking further logins...");
1967
1968         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1969         if (r < 0)
1970                 log_error_errno(r, "Failed to create /run/nologin: %m");
1971         else
1972                 m->unlink_nologin = true;
1973
1974         return 0;
1975 }
1976
1977 static int update_schedule_file(Manager *m) {
1978         _cleanup_free_ char *temp_path = NULL;
1979         _cleanup_fclose_ FILE *f = NULL;
1980         int r;
1981
1982         assert(m);
1983
1984         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1985         if (r < 0)
1986                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1987
1988         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1989         if (r < 0)
1990                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1991
1992         (void) fchmod(fileno(f), 0644);
1993
1994         fprintf(f,
1995                 "USEC="USEC_FMT"\n"
1996                 "WARN_WALL=%i\n"
1997                 "MODE=%s\n",
1998                 m->scheduled_shutdown_timeout,
1999                 m->enable_wall_messages,
2000                 m->scheduled_shutdown_type);
2001
2002         if (!isempty(m->wall_message)) {
2003                 _cleanup_free_ char *t;
2004
2005                 t = cescape(m->wall_message);
2006                 if (!t) {
2007                         r = -ENOMEM;
2008                         goto fail;
2009                 }
2010
2011                 fprintf(f, "WALL_MESSAGE=%s\n", t);
2012         }
2013
2014         r = fflush_and_check(f);
2015         if (r < 0)
2016                 goto fail;
2017
2018         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2019                 r = -errno;
2020                 goto fail;
2021         }
2022
2023         return 0;
2024
2025 fail:
2026         (void) unlink(temp_path);
2027         (void) unlink("/run/systemd/shutdown/scheduled");
2028
2029         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2030 }
2031
2032 static int manager_scheduled_shutdown_handler(
2033                         sd_event_source *s,
2034                         uint64_t usec,
2035                         void *userdata) {
2036
2037         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2038         Manager *m = userdata;
2039         HandleAction action;
2040         int r;
2041
2042         assert(m);
2043
2044         if (isempty(m->scheduled_shutdown_type))
2045                 return 0;
2046
2047         if (streq(m->scheduled_shutdown_type, "halt"))
2048                 action = HANDLE_HALT;
2049         else if (streq(m->scheduled_shutdown_type, "poweroff"))
2050                 action = HANDLE_POWEROFF;
2051         else
2052                 action = HANDLE_REBOOT;
2053
2054         r = execute_shutdown_or_sleep(m, 0, action, &error);
2055         if (r < 0)
2056                 return log_error_errno(r, "Unable to execute transition to %s: %m", m->scheduled_shutdown_type);
2057
2058         return 0;
2059 }
2060
2061 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2062         Manager *m = userdata;
2063         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2064         const char *action_multiple_sessions = NULL;
2065         const char *action_ignore_inhibit = NULL;
2066         const char *action = NULL;
2067         uint64_t elapse;
2068         char *type;
2069         int r;
2070
2071         assert(m);
2072         assert(message);
2073
2074         log_debug_elogind("%s called", __FUNCTION__);
2075
2076         r = sd_bus_message_read(message, "st", &type, &elapse);
2077         if (r < 0)
2078                 return r;
2079
2080         if (startswith(type, "dry-")) {
2081                 type += 4;
2082                 m->shutdown_dry_run = true;
2083         }
2084
2085         if (streq(type, "reboot")) {
2086                 action = "org.freedesktop.login1.reboot";
2087                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2088                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2089         } else if (streq(type, "halt")) {
2090                 action = "org.freedesktop.login1.halt";
2091                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2092                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2093         } else if (streq(type, "poweroff")) {
2094                 action = "org.freedesktop.login1.power-off";
2095                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2096                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2097         } else
2098                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2099
2100         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2101                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2102         if (r != 0)
2103                 return r;
2104
2105         if (m->scheduled_shutdown_timeout_source) {
2106                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2107                 if (r < 0)
2108                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2109
2110                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2111                 if (r < 0)
2112                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2113         } else {
2114                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2115                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2116                 if (r < 0)
2117                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2118         }
2119
2120         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2121         if (r < 0) {
2122                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2123                 return log_oom();
2124         }
2125
2126         if (m->nologin_timeout_source) {
2127                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2128                 if (r < 0)
2129                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2130
2131                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2132                 if (r < 0)
2133                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2134         } else {
2135                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2136                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2137                 if (r < 0)
2138                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2139         }
2140
2141         m->scheduled_shutdown_timeout = elapse;
2142
2143         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2144         if (r >= 0) {
2145                 const char *tty = NULL;
2146
2147                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2148                 (void) sd_bus_creds_get_tty(creds, &tty);
2149
2150                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2151                 if (r < 0) {
2152                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2153                         return log_oom();
2154                 }
2155         }
2156
2157         r = manager_setup_wall_message_timer(m);
2158         if (r < 0)
2159                 return r;
2160
2161         if (!isempty(type)) {
2162                 r = update_schedule_file(m);
2163                 if (r < 0)
2164                         return r;
2165         } else
2166                 (void) unlink("/run/systemd/shutdown/scheduled");
2167
2168         return sd_bus_reply_method_return(message, NULL);
2169 }
2170
2171 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2172         Manager *m = userdata;
2173         bool cancelled;
2174 #if 1 /// elogind needs to construct the message to allow extra wall messages
2175         _cleanup_free_ char *l = NULL;
2176 #endif // 1
2177
2178         assert(m);
2179         assert(message);
2180
2181         log_debug_elogind("%s called", __FUNCTION__);
2182
2183         cancelled = m->scheduled_shutdown_type != NULL;
2184         reset_scheduled_shutdown(m);
2185
2186         if (cancelled) {
2187                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2188                 const char *tty = NULL;
2189                 uid_t uid = 0;
2190                 int r;
2191
2192                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2193                 if (r >= 0) {
2194                         (void) sd_bus_creds_get_uid(creds, &uid);
2195                         (void) sd_bus_creds_get_tty(creds, &tty);
2196                 }
2197
2198 #if 0 /// elogind wants to allow extra cancellation messages
2199                 utmp_wall("The system shutdown has been cancelled",
2200                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2201 #else
2202                 r = asprintf(&l, "%s%sThe system shutdown has been cancelled!",
2203                              strempty(m->wall_message),
2204                              isempty(m->wall_message) ? "" : "\n");
2205                 if (r < 0) {
2206                         log_oom();
2207                         return 0;
2208                 }
2209
2210                 utmp_wall(l, uid_to_name(uid), tty, logind_wall_tty_filter, m);
2211 #endif // 0
2212         }
2213
2214         return sd_bus_reply_method_return(message, "b", cancelled);
2215 }
2216
2217 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2218         Manager *m = userdata;
2219
2220         log_debug_elogind("%s called", __FUNCTION__);
2221
2222         return method_do_shutdown_or_sleep(
2223                         m, message,
2224                         HANDLE_HIBERNATE,
2225                         INHIBIT_SLEEP,
2226                         "org.freedesktop.login1.hibernate",
2227                         "org.freedesktop.login1.hibernate-multiple-sessions",
2228                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2229                         "hibernate",
2230                         error);
2231 }
2232
2233 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2234         Manager *m = userdata;
2235
2236         log_debug_elogind("%s called", __FUNCTION__);
2237
2238         return method_do_shutdown_or_sleep(
2239                         m, message,
2240                         HANDLE_HYBRID_SLEEP,
2241                         INHIBIT_SLEEP,
2242                         "org.freedesktop.login1.hibernate",
2243                         "org.freedesktop.login1.hibernate-multiple-sessions",
2244                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2245                         "hybrid-sleep",
2246                         error);
2247 }
2248
2249 static int method_can_shutdown_or_sleep(
2250                 Manager *m,
2251                 sd_bus_message *message,
2252                 InhibitWhat w,
2253                 const char *action,
2254                 const char *action_multiple_sessions,
2255                 const char *action_ignore_inhibit,
2256                 const char *sleep_verb,
2257                 sd_bus_error *error) {
2258
2259         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2260         bool multiple_sessions, challenge, blocked;
2261         const char *result = NULL;
2262         uid_t uid;
2263         int r;
2264
2265         assert(m);
2266         assert(message);
2267         assert(w >= 0);
2268         assert(w <= _INHIBIT_WHAT_MAX);
2269         assert(action);
2270         assert(action_multiple_sessions);
2271         assert(action_ignore_inhibit);
2272
2273         if (sleep_verb) {
2274                 r = can_sleep(m, sleep_verb);
2275                 if (r < 0)
2276                         return r;
2277                 if (r == 0)
2278                         return sd_bus_reply_method_return(message, "s", "na");
2279         }
2280
2281         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2282         if (r < 0)
2283                 return r;
2284
2285         r = sd_bus_creds_get_euid(creds, &uid);
2286         if (r < 0)
2287                 return r;
2288
2289         r = have_multiple_sessions(m, uid);
2290         if (r < 0)
2291                 return r;
2292
2293         multiple_sessions = r > 0;
2294         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2295
2296         if (multiple_sessions) {
2297                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2298                 if (r < 0)
2299                         return r;
2300
2301                 if (r > 0)
2302                         result = "yes";
2303                 else if (challenge)
2304                         result = "challenge";
2305                 else
2306                         result = "no";
2307         }
2308
2309         if (blocked) {
2310                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2311                 if (r < 0)
2312                         return r;
2313
2314                 if (r > 0 && !result)
2315                         result = "yes";
2316                 else if (challenge && (!result || streq(result, "yes")))
2317                         result = "challenge";
2318                 else
2319                         result = "no";
2320         }
2321
2322         if (!multiple_sessions && !blocked) {
2323                 /* If neither inhibit nor multiple sessions
2324                  * apply then just check the normal policy */
2325
2326                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2327                 if (r < 0)
2328                         return r;
2329
2330                 if (r > 0)
2331                         result = "yes";
2332                 else if (challenge)
2333                         result = "challenge";
2334                 else
2335                         result = "no";
2336         }
2337
2338         return sd_bus_reply_method_return(message, "s", result);
2339 }
2340
2341 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2342         Manager *m = userdata;
2343
2344         return method_can_shutdown_or_sleep(
2345                         m, message,
2346                         INHIBIT_SHUTDOWN,
2347                         "org.freedesktop.login1.power-off",
2348                         "org.freedesktop.login1.power-off-multiple-sessions",
2349                         "org.freedesktop.login1.power-off-ignore-inhibit",
2350                         NULL,
2351                         error);
2352 }
2353
2354 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2355         Manager *m = userdata;
2356
2357         return method_can_shutdown_or_sleep(
2358                         m, message,
2359                         INHIBIT_SHUTDOWN,
2360                         "org.freedesktop.login1.reboot",
2361                         "org.freedesktop.login1.reboot-multiple-sessions",
2362                         "org.freedesktop.login1.reboot-ignore-inhibit",
2363                         NULL,
2364                         error);
2365 }
2366
2367 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2368         Manager *m = userdata;
2369
2370         return method_can_shutdown_or_sleep(
2371                         m, message,
2372                         INHIBIT_SLEEP,
2373                         "org.freedesktop.login1.suspend",
2374                         "org.freedesktop.login1.suspend-multiple-sessions",
2375                         "org.freedesktop.login1.suspend-ignore-inhibit",
2376                         "suspend",
2377                         error);
2378 }
2379
2380 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2381         Manager *m = userdata;
2382
2383         return method_can_shutdown_or_sleep(
2384                         m, message,
2385                         INHIBIT_SLEEP,
2386                         "org.freedesktop.login1.hibernate",
2387                         "org.freedesktop.login1.hibernate-multiple-sessions",
2388                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2389                         "hibernate",
2390                         error);
2391 }
2392
2393 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2394         Manager *m = userdata;
2395
2396         return method_can_shutdown_or_sleep(
2397                         m, message,
2398                         INHIBIT_SLEEP,
2399                         "org.freedesktop.login1.hibernate",
2400                         "org.freedesktop.login1.hibernate-multiple-sessions",
2401                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2402                         "hybrid-sleep",
2403                         error);
2404 }
2405
2406 static int property_get_reboot_to_firmware_setup(
2407                 sd_bus *bus,
2408                 const char *path,
2409                 const char *interface,
2410                 const char *property,
2411                 sd_bus_message *reply,
2412                 void *userdata,
2413                 sd_bus_error *error) {
2414 #if 0 /// elogind does not support EFI
2415         int r;
2416
2417         assert(bus);
2418         assert(reply);
2419         assert(userdata);
2420
2421         r = efi_get_reboot_to_firmware();
2422         if (r < 0 && r != -EOPNOTSUPP)
2423                 return r;
2424
2425         return sd_bus_message_append(reply, "b", r > 0);
2426 #else
2427         return sd_bus_message_append(reply, "b", false);
2428 #endif // 0
2429 }
2430
2431 static int method_set_reboot_to_firmware_setup(
2432                 sd_bus_message *message,
2433                 void *userdata,
2434                 sd_bus_error *error) {
2435
2436         int b, r;
2437         Manager *m = userdata;
2438
2439         assert(message);
2440         assert(m);
2441
2442         r = sd_bus_message_read(message, "b", &b);
2443         if (r < 0)
2444                 return r;
2445
2446         r = bus_verify_polkit_async(message,
2447                                     CAP_SYS_ADMIN,
2448                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2449                                     NULL,
2450                                     false,
2451                                     UID_INVALID,
2452                                     &m->polkit_registry,
2453                                     error);
2454         if (r < 0)
2455                 return r;
2456         if (r == 0)
2457                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2458
2459 #if 0 /// elogind does not support EFI
2460         r = efi_set_reboot_to_firmware(b);
2461         if (r < 0)
2462                 return r;
2463 #endif // 0
2464
2465         return sd_bus_reply_method_return(message, NULL);
2466 }
2467
2468 static int method_can_reboot_to_firmware_setup(
2469                 sd_bus_message *message,
2470                 void *userdata,
2471                 sd_bus_error *error) {
2472
2473 #if 0 /// elogind does not support EFI
2474         int r;
2475         bool challenge;
2476         const char *result;
2477         Manager *m = userdata;
2478
2479         assert(message);
2480         assert(m);
2481
2482         r = efi_reboot_to_firmware_supported();
2483         if (r == -EOPNOTSUPP)
2484                 return sd_bus_reply_method_return(message, "s", "na");
2485         else if (r < 0)
2486                 return r;
2487
2488         r = bus_test_polkit(message,
2489                             CAP_SYS_ADMIN,
2490                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2491                             NULL,
2492                             UID_INVALID,
2493                             &challenge,
2494                             error);
2495         if (r < 0)
2496                 return r;
2497
2498         if (r > 0)
2499                 result = "yes";
2500         else if (challenge)
2501                 result = "challenge";
2502         else
2503                 result = "no";
2504
2505         return sd_bus_reply_method_return(message, "s", result);
2506 #else
2507         return sd_bus_reply_method_return(message, "s", "no");
2508 #endif // 0
2509 }
2510
2511 static int method_set_wall_message(
2512                 sd_bus_message *message,
2513                 void *userdata,
2514                 sd_bus_error *error) {
2515
2516         int r;
2517         Manager *m = userdata;
2518         char *wall_message;
2519         int enable_wall_messages;
2520
2521         assert(message);
2522         assert(m);
2523
2524         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2525         if (r < 0)
2526                 return r;
2527
2528         r = bus_verify_polkit_async(message,
2529                                     CAP_SYS_ADMIN,
2530                                     "org.freedesktop.login1.set-wall-message",
2531                                     NULL,
2532                                     false,
2533                                     UID_INVALID,
2534                                     &m->polkit_registry,
2535                                     error);
2536         if (r < 0)
2537                 return r;
2538         if (r == 0)
2539                 return 1; /* Will call us back */
2540
2541         if (isempty(wall_message))
2542                 m->wall_message = mfree(m->wall_message);
2543         else {
2544                 r = free_and_strdup(&m->wall_message, wall_message);
2545                 if (r < 0)
2546                         return log_oom();
2547         }
2548
2549         m->enable_wall_messages = enable_wall_messages;
2550
2551         return sd_bus_reply_method_return(message, NULL);
2552 }
2553
2554 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2555         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2556         const char *who, *why, *what, *mode;
2557         _cleanup_free_ char *id = NULL;
2558         _cleanup_close_ int fifo_fd = -1;
2559         Manager *m = userdata;
2560         Inhibitor *i = NULL;
2561         InhibitMode mm;
2562         InhibitWhat w;
2563         pid_t pid;
2564         uid_t uid;
2565         int r;
2566
2567         assert(message);
2568         assert(m);
2569
2570         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2571         if (r < 0)
2572                 return r;
2573
2574         w = inhibit_what_from_string(what);
2575         if (w <= 0)
2576                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2577
2578         mm = inhibit_mode_from_string(mode);
2579         if (mm < 0)
2580                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2581
2582         /* Delay is only supported for shutdown/sleep */
2583         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2584                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2585
2586         /* Don't allow taking delay locks while we are already
2587          * executing the operation. We shouldn't create the impression
2588          * that the lock was successful if the machine is about to go
2589          * down/suspend any moment. */
2590         if (m->action_what & w)
2591                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2592
2593         r = bus_verify_polkit_async(
2594                         message,
2595                         CAP_SYS_BOOT,
2596                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2597                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2598                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2599                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2600                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2601                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2602                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2603                         NULL,
2604                         false,
2605                         UID_INVALID,
2606                         &m->polkit_registry,
2607                         error);
2608         if (r < 0)
2609                 return r;
2610         if (r == 0)
2611                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2612
2613         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2614         if (r < 0)
2615                 return r;
2616
2617         r = sd_bus_creds_get_euid(creds, &uid);
2618         if (r < 0)
2619                 return r;
2620
2621         r = sd_bus_creds_get_pid(creds, &pid);
2622         if (r < 0)
2623                 return r;
2624
2625         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2626                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2627
2628         do {
2629                 id = mfree(id);
2630
2631                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2632                         return -ENOMEM;
2633
2634         } while (hashmap_get(m->inhibitors, id));
2635
2636         r = manager_add_inhibitor(m, id, &i);
2637         if (r < 0)
2638                 return r;
2639
2640         i->what = w;
2641         i->mode = mm;
2642         i->pid = pid;
2643         i->uid = uid;
2644         i->why = strdup(why);
2645         i->who = strdup(who);
2646
2647         if (!i->why || !i->who) {
2648                 r = -ENOMEM;
2649                 goto fail;
2650         }
2651
2652         fifo_fd = inhibitor_create_fifo(i);
2653         if (fifo_fd < 0) {
2654                 r = fifo_fd;
2655                 goto fail;
2656         }
2657
2658         inhibitor_start(i);
2659
2660         return sd_bus_reply_method_return(message, "h", fifo_fd);
2661
2662 fail:
2663         if (i)
2664                 inhibitor_free(i);
2665
2666         return r;
2667 }
2668
2669 const sd_bus_vtable manager_vtable[] = {
2670         SD_BUS_VTABLE_START(0),
2671
2672         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2673         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2674
2675 //        SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2676         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2677         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2678         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2679         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2680         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2681         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2682         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2683         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2684         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2685         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2686         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2687         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2688         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2689         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2690         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2691         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2692         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2693         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2694         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2695         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2696         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2697         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2698         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2699         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2700         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2701         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2702         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2703         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2704         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2705
2706         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2707         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2708         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2709         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2710         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2711         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2712         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2713         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2714         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2715         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2716         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2717         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2718         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2719         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2720         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2721         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2722         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2723         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2724         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2725         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2726         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2727         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2728         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2729         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2730         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2731         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2732         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2733         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2734         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2735         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2736         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2737         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2738         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2739         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2740         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2741         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2742         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2743         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2744         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2745         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2746         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2747
2748         SD_BUS_SIGNAL("SessionNew", "so", 0),
2749         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2750         SD_BUS_SIGNAL("UserNew", "uo", 0),
2751         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2752         SD_BUS_SIGNAL("SeatNew", "so", 0),
2753         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2754         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2755         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2756
2757         SD_BUS_VTABLE_END
2758 };
2759
2760 #if 0 /// UNNEEDED by elogind
2761 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2762         int r = 0;
2763
2764         assert(s);
2765         assert(unit);
2766
2767         if (!s->started)
2768                 return r;
2769
2770         if (streq(result, "done"))
2771                 r = session_send_create_reply(s, NULL);
2772         else {
2773                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2774
2775                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2776                 r = session_send_create_reply(s, &e);
2777         }
2778
2779         return r;
2780 }
2781
2782 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2783         const char *path, *result, *unit;
2784         Manager *m = userdata;
2785         Session *session;
2786         uint32_t id;
2787         User *user;
2788         int r;
2789
2790         assert(message);
2791         assert(m);
2792
2793         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2794         if (r < 0) {
2795                 bus_log_parse_error(r);
2796                 return 0;
2797         }
2798
2799         if (m->action_job && streq(m->action_job, path)) {
2800                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2801
2802                 /* Tell people that they now may take a lock again */
2803                 send_prepare_for(m, m->action_what, false);
2804
2805                 m->action_job = mfree(m->action_job);
2806                 m->action_unit = NULL;
2807                 m->action_what = 0;
2808                 return 0;
2809         }
2810
2811         session = hashmap_get(m->session_units, unit);
2812         if (session && streq_ptr(path, session->scope_job)) {
2813                 session->scope_job = mfree(session->scope_job);
2814                 session_jobs_reply(session, unit, result);
2815
2816                 session_save(session);
2817                 user_save(session->user);
2818                 session_add_to_gc_queue(session);
2819         }
2820
2821         user = hashmap_get(m->user_units, unit);
2822         if (user &&
2823             (streq_ptr(path, user->service_job) ||
2824              streq_ptr(path, user->slice_job))) {
2825
2826                 if (streq_ptr(path, user->service_job))
2827                         user->service_job = mfree(user->service_job);
2828
2829                 if (streq_ptr(path, user->slice_job))
2830                         user->slice_job = mfree(user->slice_job);
2831
2832                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2833                         session_jobs_reply(session, unit, result);
2834
2835                 user_save(user);
2836                 user_add_to_gc_queue(user);
2837         }
2838
2839         return 0;
2840 }
2841
2842 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2843         const char *path, *unit;
2844         Manager *m = userdata;
2845         Session *session;
2846         User *user;
2847         int r;
2848
2849         assert(message);
2850         assert(m);
2851
2852         r = sd_bus_message_read(message, "so", &unit, &path);
2853         if (r < 0) {
2854                 bus_log_parse_error(r);
2855                 return 0;
2856         }
2857
2858         session = hashmap_get(m->session_units, unit);
2859         if (session)
2860                 session_add_to_gc_queue(session);
2861
2862         user = hashmap_get(m->user_units, unit);
2863         if (user)
2864                 user_add_to_gc_queue(user);
2865
2866         return 0;
2867 }
2868
2869 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2870         _cleanup_free_ char *unit = NULL;
2871         Manager *m = userdata;
2872         const char *path;
2873         Session *session;
2874         User *user;
2875         int r;
2876
2877         assert(message);
2878         assert(m);
2879
2880         path = sd_bus_message_get_path(message);
2881         if (!path)
2882                 return 0;
2883
2884         r = unit_name_from_dbus_path(path, &unit);
2885         if (r == -EINVAL) /* not a unit */
2886                 return 0;
2887         if (r < 0) {
2888                 log_oom();
2889                 return 0;
2890         }
2891
2892         session = hashmap_get(m->session_units, unit);
2893         if (session)
2894                 session_add_to_gc_queue(session);
2895
2896         user = hashmap_get(m->user_units, unit);
2897         if (user)
2898                 user_add_to_gc_queue(user);
2899
2900         return 0;
2901 }
2902
2903 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2904         Manager *m = userdata;
2905         Session *session;
2906         Iterator i;
2907         int b, r;
2908
2909         assert(message);
2910         assert(m);
2911
2912         r = sd_bus_message_read(message, "b", &b);
2913         if (r < 0) {
2914                 bus_log_parse_error(r);
2915                 return 0;
2916         }
2917
2918         if (b)
2919                 return 0;
2920
2921         /* systemd finished reloading, let's recheck all our sessions */
2922         log_debug("System manager has been reloaded, rechecking sessions...");
2923
2924         HASHMAP_FOREACH(session, m->sessions, i)
2925                 session_add_to_gc_queue(session);
2926
2927         return 0;
2928 }
2929 #endif // 0
2930
2931 int manager_send_changed(Manager *manager, const char *property, ...) {
2932         char **l;
2933
2934         assert(manager);
2935
2936         l = strv_from_stdarg_alloca(property);
2937
2938         return sd_bus_emit_properties_changed_strv(
2939                         manager->bus,
2940                         "/org/freedesktop/login1",
2941                         "org.freedesktop.login1.Manager",
2942                         l);
2943 }
2944
2945 #if 0 /// UNNEEDED by elogind
2946 static int strdup_job(sd_bus_message *reply, char **job) {
2947         const char *j;
2948         char *copy;
2949         int r;
2950
2951         r = sd_bus_message_read(reply, "o", &j);
2952         if (r < 0)
2953                 return r;
2954
2955         copy = strdup(j);
2956         if (!copy)
2957                 return -ENOMEM;
2958
2959         *job = copy;
2960         return 1;
2961 }
2962
2963 int manager_start_slice(
2964                 Manager *manager,
2965                 const char *slice,
2966                 const char *description,
2967                 const char *after,
2968                 const char *after2,
2969                 uint64_t tasks_max,
2970                 sd_bus_error *error,
2971                 char **job) {
2972
2973         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2974         int r;
2975
2976         assert(manager);
2977         assert(slice);
2978
2979         r = sd_bus_message_new_method_call(
2980                         manager->bus,
2981                         &m,
2982                         "org.freedesktop.systemd1",
2983                         "/org/freedesktop/systemd1",
2984                         "org.freedesktop.systemd1.Manager",
2985                         "StartTransientUnit");
2986         if (r < 0)
2987                 return r;
2988
2989         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2990         if (r < 0)
2991                 return r;
2992
2993         r = sd_bus_message_open_container(m, 'a', "(sv)");
2994         if (r < 0)
2995                 return r;
2996
2997         if (!isempty(description)) {
2998                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2999                 if (r < 0)
3000                         return r;
3001         }
3002
3003         if (!isempty(after)) {
3004                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3005                 if (r < 0)
3006                         return r;
3007         }
3008
3009         if (!isempty(after2)) {
3010                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3011                 if (r < 0)
3012                         return r;
3013         }
3014
3015         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3016         if (r < 0)
3017                 return r;
3018
3019         r = sd_bus_message_close_container(m);
3020         if (r < 0)
3021                 return r;
3022
3023         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3024         if (r < 0)
3025                 return r;
3026
3027         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3028         if (r < 0)
3029                 return r;
3030
3031         if (job)
3032                 return strdup_job(reply, job);
3033         return 1;
3034 }
3035
3036 int manager_start_scope(
3037                 Manager *manager,
3038                 const char *scope,
3039                 pid_t pid,
3040                 const char *slice,
3041                 const char *description,
3042                 const char *after,
3043                 const char *after2,
3044                 uint64_t tasks_max,
3045                 sd_bus_error *error,
3046                 char **job) {
3047
3048         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3049         int r;
3050
3051         assert(manager);
3052         assert(scope);
3053         assert(pid > 1);
3054
3055         r = sd_bus_message_new_method_call(
3056                         manager->bus,
3057                         &m,
3058                         "org.freedesktop.systemd1",
3059                         "/org/freedesktop/systemd1",
3060                         "org.freedesktop.systemd1.Manager",
3061                         "StartTransientUnit");
3062         if (r < 0)
3063                 return r;
3064
3065         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3066         if (r < 0)
3067                 return r;
3068
3069         r = sd_bus_message_open_container(m, 'a', "(sv)");
3070         if (r < 0)
3071                 return r;
3072
3073         if (!isempty(slice)) {
3074                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3075                 if (r < 0)
3076                         return r;
3077         }
3078
3079         if (!isempty(description)) {
3080                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3081                 if (r < 0)
3082                         return r;
3083         }
3084
3085         if (!isempty(after)) {
3086                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3087                 if (r < 0)
3088                         return r;
3089         }
3090
3091         if (!isempty(after2)) {
3092                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3093                 if (r < 0)
3094                         return r;
3095         }
3096
3097         /* cgroup empty notification is not available in containers
3098          * currently. To make this less problematic, let's shorten the
3099          * stop timeout for sessions, so that we don't wait
3100          * forever. */
3101
3102         /* Make sure that the session shells are terminated with
3103          * SIGHUP since bash and friends tend to ignore SIGTERM */
3104         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3105         if (r < 0)
3106                 return r;
3107
3108         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3109         if (r < 0)
3110                 return r;
3111
3112         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3113         if (r < 0)
3114                 return r;
3115
3116         r = sd_bus_message_close_container(m);
3117         if (r < 0)
3118                 return r;
3119
3120         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3121         if (r < 0)
3122                 return r;
3123
3124         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3125         if (r < 0)
3126                 return r;
3127
3128         if (job)
3129                 return strdup_job(reply, job);
3130         return 1;
3131 }
3132
3133 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3134         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3135         int r;
3136
3137         assert(manager);
3138         assert(unit);
3139
3140         r = sd_bus_call_method(
3141                         manager->bus,
3142                         "org.freedesktop.systemd1",
3143                         "/org/freedesktop/systemd1",
3144                         "org.freedesktop.systemd1.Manager",
3145                         "StartUnit",
3146                         error,
3147                         &reply,
3148                         "ss", unit, "replace");
3149         if (r < 0)
3150                 return r;
3151
3152         if (job)
3153                 return strdup_job(reply, job);
3154         return 1;
3155 }
3156
3157 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3158         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3159         int r;
3160
3161         assert(manager);
3162         assert(unit);
3163
3164         r = sd_bus_call_method(
3165                         manager->bus,
3166                         "org.freedesktop.systemd1",
3167                         "/org/freedesktop/systemd1",
3168                         "org.freedesktop.systemd1.Manager",
3169                         "StopUnit",
3170                         error,
3171                         &reply,
3172                         "ss", unit, "fail");
3173         if (r < 0) {
3174                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3175                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3176
3177                         if (job)
3178                                 *job = NULL;
3179
3180                         sd_bus_error_free(error);
3181                         return 0;
3182                 }
3183
3184                 return r;
3185         }
3186
3187         if (job)
3188                 return strdup_job(reply, job);
3189         return 1;
3190 }
3191
3192 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3193         _cleanup_free_ char *path = NULL;
3194         int r;
3195
3196         assert(manager);
3197         assert(scope);
3198
3199         path = unit_dbus_path_from_name(scope);
3200         if (!path)
3201                 return -ENOMEM;
3202
3203         r = sd_bus_call_method(
3204                         manager->bus,
3205                         "org.freedesktop.systemd1",
3206                         path,
3207                         "org.freedesktop.systemd1.Scope",
3208                         "Abandon",
3209                         error,
3210                         NULL,
3211                         NULL);
3212         if (r < 0) {
3213                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3214                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3215                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3216                         sd_bus_error_free(error);
3217                         return 0;
3218                 }
3219
3220                 return r;
3221         }
3222
3223         return 1;
3224 }
3225
3226 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3227         assert(manager);
3228         assert(unit);
3229
3230         return sd_bus_call_method(
3231                         manager->bus,
3232                         "org.freedesktop.systemd1",
3233                         "/org/freedesktop/systemd1",
3234                         "org.freedesktop.systemd1.Manager",
3235                         "KillUnit",
3236                         error,
3237                         NULL,
3238                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3239 }
3240
3241 int manager_unit_is_active(Manager *manager, const char *unit) {
3242         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3243         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3244         _cleanup_free_ char *path = NULL;
3245         const char *state;
3246         int r;
3247
3248         assert(manager);
3249         assert(unit);
3250
3251         path = unit_dbus_path_from_name(unit);
3252         if (!path)
3253                 return -ENOMEM;
3254
3255         r = sd_bus_get_property(
3256                         manager->bus,
3257                         "org.freedesktop.systemd1",
3258                         path,
3259                         "org.freedesktop.systemd1.Unit",
3260                         "ActiveState",
3261                         &error,
3262                         &reply,
3263                         "s");
3264         if (r < 0) {
3265                 /* systemd might have droppped off momentarily, let's
3266                  * not make this an error */
3267                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3268                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3269                         return true;
3270
3271                 /* If the unit is already unloaded then it's not
3272                  * active */
3273                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3274                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3275                         return false;
3276
3277                 return r;
3278         }
3279
3280         r = sd_bus_message_read(reply, "s", &state);
3281         if (r < 0)
3282                 return -EINVAL;
3283
3284         return !streq(state, "inactive") && !streq(state, "failed");
3285 }
3286
3287 int manager_job_is_active(Manager *manager, const char *path) {
3288         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3289         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3290         int r;
3291
3292         assert(manager);
3293         assert(path);
3294
3295         r = sd_bus_get_property(
3296                         manager->bus,
3297                         "org.freedesktop.systemd1",
3298                         path,
3299                         "org.freedesktop.systemd1.Job",
3300                         "State",
3301                         &error,
3302                         &reply,
3303                         "s");
3304         if (r < 0) {
3305                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3306                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3307                         return true;
3308
3309                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3310                         return false;
3311
3312                 return r;
3313         }
3314
3315         /* We don't actually care about the state really. The fact
3316          * that we could read the job state is enough for us */
3317
3318         return true;
3319 }
3320 #endif // 0