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 "format-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 "elogind-dbus.h"
  55 //#include "update-utmp.h"
  56
  57 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  58         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  59         Session *session;
  60         int r;
  61
  62         assert(m);
  63         assert(message);
  64         assert(ret);
  65
  66         if (isempty(name)) {
  67                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  68                 if (r < 0)
  69                         return r;
  70
  71                 r = sd_bus_creds_get_session(creds, &name);
  72                 if (r == -ENXIO)
  73                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
  74                                                  "Caller does not belong to any known session");
  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_is_valid(uid)) {
  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         (void) audit_session_from_pid(leader, &audit_id);
 775         if (audit_session_is_valid(audit_id)) {
 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 = AUDIT_SESSION_INVALID;
 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         return sd_bus_reply_method_return(message, NULL);
 929 }
 930
 931 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 932         Manager *m = userdata;
 933         Session *session;
 934         const char *name;
 935         int r;
 936
 937         assert(message);
 938         assert(m);
 939
 940         r = sd_bus_message_read(message, "s", &name);
 941         if (r < 0)
 942                 return r;
 943
 944         r = manager_get_session_from_creds(m, message, name, error, &session);
 945         if (r < 0)
 946                 return r;
 947
 948         return bus_session_method_activate(message, session, error);
 949 }
 950
 951 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 952         const char *session_name, *seat_name;
 953         Manager *m = userdata;
 954         Session *session;
 955         Seat *seat;
 956         int r;
 957
 958         assert(message);
 959         assert(m);
 960
 961         /* Same as ActivateSession() but refuses to work if
 962          * the seat doesn't match */
 963
 964         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 965         if (r < 0)
 966                 return r;
 967
 968         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 969         if (r < 0)
 970                 return r;
 971
 972         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 973         if (r < 0)
 974                 return r;
 975
 976         if (session->seat != seat)
 977                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 978
 979         r = session_activate(session);
 980         if (r < 0)
 981                 return r;
 982
 983         return sd_bus_reply_method_return(message, NULL);
 984 }
 985
 986 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 987         Manager *m = userdata;
 988         Session *session;
 989         const char *name;
 990         int r;
 991
 992         assert(message);
 993         assert(m);
 994
 995         r = sd_bus_message_read(message, "s", &name);
 996         if (r < 0)
 997                 return r;
 998
 999         r = manager_get_session_from_creds(m, message, name, error, &session);
1000         if (r < 0)
1001                 return r;
1002
1003         return bus_session_method_lock(message, session, error);
1004 }
1005
1006 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1007         Manager *m = userdata;
1008         int r;
1009
1010         assert(message);
1011         assert(m);
1012
1013         r = bus_verify_polkit_async(
1014                         message,
1015                         CAP_SYS_ADMIN,
1016                         "org.freedesktop.login1.lock-sessions",
1017                         NULL,
1018                         false,
1019                         UID_INVALID,
1020                         &m->polkit_registry,
1021                         error);
1022         if (r < 0)
1023                 return r;
1024         if (r == 0)
1025                 return 1; /* Will call us back */
1026
1027         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1028         if (r < 0)
1029                 return r;
1030
1031         return sd_bus_reply_method_return(message, NULL);
1032 }
1033
1034 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1035         const char *name;
1036         Manager *m = userdata;
1037         Session *session;
1038         int r;
1039
1040         assert(message);
1041         assert(m);
1042
1043         r = sd_bus_message_read(message, "s", &name);
1044         if (r < 0)
1045                 return r;
1046
1047         r = manager_get_session_from_creds(m, message, name, error, &session);
1048         if (r < 0)
1049                 return r;
1050
1051         return bus_session_method_kill(message, session, error);
1052 }
1053
1054 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1055         Manager *m = userdata;
1056         uint32_t uid;
1057         User *user;
1058         int r;
1059
1060         assert(message);
1061         assert(m);
1062
1063         r = sd_bus_message_read(message, "u", &uid);
1064         if (r < 0)
1065                 return r;
1066
1067         r = manager_get_user_from_creds(m, message, uid, error, &user);
1068         if (r < 0)
1069                 return r;
1070
1071         return bus_user_method_kill(message, user, error);
1072 }
1073
1074 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1075         Manager *m = userdata;
1076         const char *name;
1077         Session *session;
1078         int r;
1079
1080         assert(message);
1081         assert(m);
1082
1083         r = sd_bus_message_read(message, "s", &name);
1084         if (r < 0)
1085                 return r;
1086
1087         r = manager_get_session_from_creds(m, message, name, error, &session);
1088         if (r < 0)
1089                 return r;
1090
1091         return bus_session_method_terminate(message, session, error);
1092 }
1093
1094 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1095         Manager *m = userdata;
1096         uint32_t uid;
1097         User *user;
1098         int r;
1099
1100         assert(message);
1101         assert(m);
1102
1103         r = sd_bus_message_read(message, "u", &uid);
1104         if (r < 0)
1105                 return r;
1106
1107         r = manager_get_user_from_creds(m, message, uid, error, &user);
1108         if (r < 0)
1109                 return r;
1110
1111         return bus_user_method_terminate(message, user, error);
1112 }
1113
1114 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1115         Manager *m = userdata;
1116         const char *name;
1117         Seat *seat;
1118         int r;
1119
1120         assert(message);
1121         assert(m);
1122
1123         r = sd_bus_message_read(message, "s", &name);
1124         if (r < 0)
1125                 return r;
1126
1127         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1128         if (r < 0)
1129                 return r;
1130
1131         return bus_seat_method_terminate(message, seat, error);
1132 }
1133
1134 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1135         _cleanup_free_ char *cc = NULL;
1136         Manager *m = userdata;
1137         int r, b, interactive;
1138         struct passwd *pw;
1139         const char *path;
1140         uint32_t uid;
1141         bool self = false;
1142
1143         assert(message);
1144         assert(m);
1145
1146         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1147         if (r < 0)
1148                 return r;
1149
1150         if (!uid_is_valid(uid)) {
1151                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1152
1153                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1154                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1155                 if (r < 0)
1156                         return r;
1157
1158                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1159                 if (r < 0)
1160                         return r;
1161
1162                 self = true;
1163
1164         } else if (!uid_is_valid(uid))
1165                 return -EINVAL;
1166
1167         errno = 0;
1168         pw = getpwuid(uid);
1169         if (!pw)
1170                 return errno > 0 ? -errno : -ENOENT;
1171
1172         r = bus_verify_polkit_async(
1173                         message,
1174                         CAP_SYS_ADMIN,
1175                         self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger",
1176                         NULL,
1177                         interactive,
1178                         UID_INVALID,
1179                         &m->polkit_registry,
1180                         error);
1181         if (r < 0)
1182                 return r;
1183         if (r == 0)
1184                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1185
1186         mkdir_p_label("/var/lib/systemd", 0755);
1187
1188         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1189         if (r < 0)
1190                 return r;
1191
1192         cc = cescape(pw->pw_name);
1193         if (!cc)
1194                 return -ENOMEM;
1195
1196         path = strjoina("/var/lib/systemd/linger/", cc);
1197         if (b) {
1198                 User *u;
1199
1200                 r = touch(path);
1201                 if (r < 0)
1202                         return r;
1203
1204                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1205                         user_start(u);
1206
1207         } else {
1208                 User *u;
1209
1210                 r = unlink(path);
1211                 if (r < 0 && errno != ENOENT)
1212                         return -errno;
1213
1214                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1215                 if (u)
1216                         user_add_to_gc_queue(u);
1217         }
1218
1219         return sd_bus_reply_method_return(message, NULL);
1220 }
1221
1222 static int trigger_device(Manager *m, struct udev_device *d) {
1223         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1224         struct udev_list_entry *first, *item;
1225         int r;
1226
1227         assert(m);
1228
1229         e = udev_enumerate_new(m->udev);
1230         if (!e)
1231                 return -ENOMEM;
1232
1233         if (d) {
1234                 r = udev_enumerate_add_match_parent(e, d);
1235                 if (r < 0)
1236                         return r;
1237         }
1238
1239         r = udev_enumerate_scan_devices(e);
1240         if (r < 0)
1241                 return r;
1242
1243         first = udev_enumerate_get_list_entry(e);
1244         udev_list_entry_foreach(item, first) {
1245                 _cleanup_free_ char *t = NULL;
1246                 const char *p;
1247
1248                 p = udev_list_entry_get_name(item);
1249
1250                 t = strappend(p, "/uevent");
1251                 if (!t)
1252                         return -ENOMEM;
1253
1254                 write_string_file(t, "change", WRITE_STRING_FILE_CREATE);
1255         }
1256
1257         return 0;
1258 }
1259
1260 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1261         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1262         _cleanup_free_ char *rule = NULL, *file = NULL;
1263         const char *id_for_seat;
1264         int r;
1265
1266         assert(m);
1267         assert(seat);
1268         assert(sysfs);
1269
1270         d = udev_device_new_from_syspath(m->udev, sysfs);
1271         if (!d)
1272                 return -ENODEV;
1273
1274         if (!udev_device_has_tag(d, "seat"))
1275                 return -ENODEV;
1276
1277         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1278         if (!id_for_seat)
1279                 return -ENODEV;
1280
1281         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1282                 return -ENOMEM;
1283
1284         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1285                 return -ENOMEM;
1286
1287         mkdir_p_label("/etc/udev/rules.d", 0755);
1288         r = write_string_file_atomic_label(file, rule);
1289         if (r < 0)
1290                 return r;
1291
1292         return trigger_device(m, d);
1293 }
1294
1295 static int flush_devices(Manager *m) {
1296         _cleanup_closedir_ DIR *d;
1297
1298         assert(m);
1299
1300         d = opendir("/etc/udev/rules.d");
1301         if (!d) {
1302                 if (errno != ENOENT)
1303                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1304         } else {
1305                 struct dirent *de;
1306
1307                 FOREACH_DIRENT_ALL(de, d, break) {
1308                         if (!dirent_is_file(de))
1309                                 continue;
1310
1311                         if (!startswith(de->d_name, "72-seat-"))
1312                                 continue;
1313
1314                         if (!endswith(de->d_name, ".rules"))
1315                                 continue;
1316
1317                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1318                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1319                 }
1320         }
1321
1322         return trigger_device(m, NULL);
1323 }
1324
1325 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1326         const char *sysfs, *seat;
1327         Manager *m = userdata;
1328         int interactive, r;
1329
1330         assert(message);
1331         assert(m);
1332
1333         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1334         if (r < 0)
1335                 return r;
1336
1337         if (!path_startswith(sysfs, "/sys"))
1338                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1339
1340         if (!seat_name_is_valid(seat))
1341                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1342
1343         r = bus_verify_polkit_async(
1344                         message,
1345                         CAP_SYS_ADMIN,
1346                         "org.freedesktop.login1.attach-device",
1347                         NULL,
1348                         interactive,
1349                         UID_INVALID,
1350                         &m->polkit_registry,
1351                         error);
1352         if (r < 0)
1353                 return r;
1354         if (r == 0)
1355                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1356
1357         r = attach_device(m, seat, sysfs);
1358         if (r < 0)
1359                 return r;
1360
1361         return sd_bus_reply_method_return(message, NULL);
1362 }
1363
1364 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1365         Manager *m = userdata;
1366         int interactive, r;
1367
1368         assert(message);
1369         assert(m);
1370
1371         r = sd_bus_message_read(message, "b", &interactive);
1372         if (r < 0)
1373                 return r;
1374
1375         r = bus_verify_polkit_async(
1376                         message,
1377                         CAP_SYS_ADMIN,
1378                         "org.freedesktop.login1.flush-devices",
1379                         NULL,
1380                         interactive,
1381                         UID_INVALID,
1382                         &m->polkit_registry,
1383                         error);
1384         if (r < 0)
1385                 return r;
1386         if (r == 0)
1387                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1388
1389         r = flush_devices(m);
1390         if (r < 0)
1391                 return r;
1392
1393         return sd_bus_reply_method_return(message, NULL);
1394 }
1395
1396 static int have_multiple_sessions(
1397                 Manager *m,
1398                 uid_t uid) {
1399
1400         Session *session;
1401         Iterator i;
1402
1403         assert(m);
1404
1405         /* Check for other users' sessions. Greeter sessions do not
1406          * count, and non-login sessions do not count either. */
1407         HASHMAP_FOREACH(session, m->sessions, i)
1408                 if (session->class == SESSION_USER &&
1409                     session->user->uid != uid)
1410                         return true;
1411
1412         return false;
1413 }
1414
1415 #if 0 /// elogind has its own variant in elogind-dbus.c
1416 static int bus_manager_log_shutdown(
1417                 Manager *m,
1418                 InhibitWhat w,
1419                 const char *unit_name) {
1420
1421         const char *p, *q;
1422
1423         assert(m);
1424         assert(unit_name);
1425
1426         if (w != INHIBIT_SHUTDOWN)
1427                 return 0;
1428
1429         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1430                 p = "MESSAGE=System is powering down";
1431                 q = "SHUTDOWN=power-off";
1432         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1433                 p = "MESSAGE=System is halting";
1434                 q = "SHUTDOWN=halt";
1435         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1436                 p = "MESSAGE=System is rebooting";
1437                 q = "SHUTDOWN=reboot";
1438         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1439                 p = "MESSAGE=System is rebooting with kexec";
1440                 q = "SHUTDOWN=kexec";
1441         } else {
1442                 p = "MESSAGE=System is shutting down";
1443                 q = NULL;
1444         }
1445
1446         if (isempty(m->wall_message))
1447                 p = strjoina(p, ".");
1448         else
1449                 p = strjoina(p, " (", m->wall_message, ").");
1450
1451         return log_struct(LOG_NOTICE,
1452                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1453                           p,
1454                           q,
1455                           NULL);
1456 }
1457 #endif // 0
1458
1459 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1460         Manager *m = userdata;
1461
1462         assert(e);
1463         assert(m);
1464
1465         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1466         return 0;
1467 }
1468
1469 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1470         int r;
1471
1472         assert(m);
1473
1474         if (until <= now(CLOCK_MONOTONIC))
1475                 return 0;
1476
1477         /* We want to ignore the lid switch for a while after each
1478          * suspend, and after boot-up. Hence let's install a timer for
1479          * this. As long as the event source exists we ignore the lid
1480          * switch. */
1481
1482         if (m->lid_switch_ignore_event_source) {
1483                 usec_t u;
1484
1485                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1486                 if (r < 0)
1487                         return r;
1488
1489                 if (until <= u)
1490                         return 0;
1491
1492                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1493         } else
1494                 r = sd_event_add_time(
1495                                 m->event,
1496                                 &m->lid_switch_ignore_event_source,
1497                                 CLOCK_MONOTONIC,
1498                                 until, 0,
1499                                 lid_switch_ignore_handler, m);
1500
1501         return r;
1502 }
1503
1504 static void reset_scheduled_shutdown(Manager *m) {
1505         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1506         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1507         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1508         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1509         m->scheduled_shutdown_timeout = 0;
1510         m->shutdown_dry_run = false;
1511
1512         if (m->unlink_nologin) {
1513                 (void) unlink("/run/nologin");
1514                 m->unlink_nologin = false;
1515         }
1516 }
1517
1518 #if 0 /// elogind has its own variant in elogind-dbus.c
1519 static int execute_shutdown_or_sleep(
1520                 Manager *m,
1521                 InhibitWhat w,
1522                 const char *unit_name,
1523                 sd_bus_error *error) {
1524
1525         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1526         char *c = NULL;
1527         const char *p;
1528         int r;
1529
1530         assert(m);
1531         assert(w >= 0);
1532         assert(w < _INHIBIT_WHAT_MAX);
1533         assert(unit_name);
1534
1535         bus_manager_log_shutdown(m, w, unit_name);
1536
1537         if (m->shutdown_dry_run) {
1538                 log_info("Running in dry run, suppressing action.");
1539                 reset_scheduled_shutdown(m);
1540         } else {
1541                 r = sd_bus_call_method(
1542                                 m->bus,
1543                                 "org.freedesktop.systemd1",
1544                                 "/org/freedesktop/systemd1",
1545                                 "org.freedesktop.systemd1.Manager",
1546                                 "StartUnit",
1547                                 error,
1548                                 &reply,
1549                                 "ss", unit_name, "replace-irreversibly");
1550                 if (r < 0)
1551                         return r;
1552
1553                 r = sd_bus_message_read(reply, "o", &p);
1554                 if (r < 0)
1555                         return r;
1556
1557                 c = strdup(p);
1558                 if (!c)
1559                         return -ENOMEM;
1560         }
1561
1562         m->action_unit = unit_name;
1563         free(m->action_job);
1564         m->action_job = c;
1565         m->action_what = w;
1566
1567         /* Make sure the lid switch is ignored for a while */
1568         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1569
1570         return 0;
1571 }
1572
1573 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1574
1575         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1576         Inhibitor *offending = NULL;
1577         int r;
1578
1579         assert(manager);
1580
1581         if (manager->action_what == 0 || manager->action_job)
1582                 return 0;
1583
1584         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1585                 _cleanup_free_ char *comm = NULL, *u = NULL;
1586
1587                 if (!timeout)
1588                         return 0;
1589
1590                 (void) get_process_comm(offending->pid, &comm);
1591                 u = uid_to_name(offending->uid);
1592
1593                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1594                            offending->uid, strna(u),
1595                            offending->pid, strna(comm));
1596         }
1597
1598         /* Actually do the operation */
1599         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1600         if (r < 0) {
1601                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1602
1603                 manager->action_unit = NULL;
1604                 manager->action_what = 0;
1605                 return r;
1606         }
1607
1608         return 1;
1609 }
1610 #endif // 0
1611
1612 #if 0 /// elogind-dbus.c needs to access this
1613 static int manager_inhibit_timeout_handler(
1614 #else
1615 int manager_inhibit_timeout_handler(
1616 #endif // 0
1617                         sd_event_source *s,
1618                         uint64_t usec,
1619                         void *userdata) {
1620
1621         Manager *manager = userdata;
1622         int r;
1623
1624         assert(manager);
1625         assert(manager->inhibit_timeout_source == s);
1626
1627         r = manager_dispatch_delayed(manager, true);
1628         return (r < 0) ? r : 0;
1629 }
1630
1631 #if 0 /// elogind has its own variant in elogind-dbus.c
1632 static int delay_shutdown_or_sleep(
1633                 Manager *m,
1634                 InhibitWhat w,
1635                 const char *unit_name) {
1636
1637         int r;
1638         usec_t timeout_val;
1639
1640         assert(m);
1641         assert(w >= 0);
1642         assert(w < _INHIBIT_WHAT_MAX);
1643         assert(unit_name);
1644
1645         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1646
1647         if (m->inhibit_timeout_source) {
1648                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1649                 if (r < 0)
1650                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1651
1652                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1653                 if (r < 0)
1654                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1655         } else {
1656                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1657                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1658                 if (r < 0)
1659                         return r;
1660         }
1661
1662         m->action_unit = unit_name;
1663         m->action_what = w;
1664
1665         return 0;
1666 }
1667 #endif // 0
1668
1669 #if 0 /// elogind-dbus.c needs to access this
1670 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1671 #else
1672 int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1673 #endif // 0
1674
1675         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1676                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1677                 [INHIBIT_SLEEP] = "PrepareForSleep"
1678         };
1679
1680         int active = _active;
1681
1682         assert(m);
1683         assert(w >= 0);
1684         assert(w < _INHIBIT_WHAT_MAX);
1685         assert(signal_name[w]);
1686
1687         return sd_bus_emit_signal(m->bus,
1688                                   "/org/freedesktop/login1",
1689                                   "org.freedesktop.login1.Manager",
1690                                   signal_name[w],
1691                                   "b",
1692                                   active);
1693 }
1694
1695 #if 0 /// elogind has its own variant in elogind-dbus.c
1696 int bus_manager_shutdown_or_sleep_now_or_later(
1697                 Manager *m,
1698                 const char *unit_name,
1699                 InhibitWhat w,
1700                 sd_bus_error *error) {
1701
1702         bool delayed;
1703         int r;
1704
1705         assert(m);
1706         assert(unit_name);
1707         assert(w >= 0);
1708         assert(w <= _INHIBIT_WHAT_MAX);
1709         assert(!m->action_job);
1710
1711         /* Tell everybody to prepare for shutdown/sleep */
1712         send_prepare_for(m, w, true);
1713
1714         delayed =
1715                 m->inhibit_delay_max > 0 &&
1716                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1717
1718         log_debug_elogind("%s called for %s (%sdelayed)", __FUNCTION__,
1719                           handle_action_to_string(action),
1720                           delayed ? "" : "NOT ");
1721         if (delayed)
1722                 /* Shutdown is delayed, keep in mind what we
1723                  * want to do, and start a timeout */
1724                 r = delay_shutdown_or_sleep(m, w, unit_name);
1725         else
1726                 /* Shutdown is not delayed, execute it
1727                  * immediately */
1728                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1729
1730         return r;
1731 }
1732 #endif // 0
1733
1734 #if 0 /// elogind-dbus.c needs to access this
1735 static int verify_shutdown_creds(
1736 #else
1737 int verify_shutdown_creds(
1738 #endif // 0
1739                 Manager *m,
1740                 sd_bus_message *message,
1741                 InhibitWhat w,
1742                 bool interactive,
1743                 const char *action,
1744                 const char *action_multiple_sessions,
1745                 const char *action_ignore_inhibit,
1746                 sd_bus_error *error) {
1747
1748         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1749         bool multiple_sessions, blocked;
1750         uid_t uid;
1751         int r;
1752
1753         assert(m);
1754         assert(message);
1755         assert(w >= 0);
1756         assert(w <= _INHIBIT_WHAT_MAX);
1757
1758         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1759         if (r < 0)
1760                 return r;
1761
1762         r = sd_bus_creds_get_euid(creds, &uid);
1763         if (r < 0)
1764                 return r;
1765
1766         r = have_multiple_sessions(m, uid);
1767         if (r < 0)
1768                 return r;
1769
1770         multiple_sessions = r > 0;
1771         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1772
1773         if (multiple_sessions && action_multiple_sessions) {
1774                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1775                 if (r < 0)
1776                         return r;
1777                 if (r == 0)
1778                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1779         }
1780
1781         if (blocked && action_ignore_inhibit) {
1782                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1783                 if (r < 0)
1784                         return r;
1785                 if (r == 0)
1786                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1787         }
1788
1789         if (!multiple_sessions && !blocked && action) {
1790                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1791                 if (r < 0)
1792                         return r;
1793                 if (r == 0)
1794                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1795         }
1796
1797         return 0;
1798 }
1799
1800 #if 0 /// elogind has its own variant in elogind-dbus.c
1801 static int method_do_shutdown_or_sleep(
1802                 Manager *m,
1803                 sd_bus_message *message,
1804                 const char *unit_name,
1805                 InhibitWhat w,
1806                 const char *action,
1807                 const char *action_multiple_sessions,
1808                 const char *action_ignore_inhibit,
1809                 const char *sleep_verb,
1810                 sd_bus_error *error) {
1811
1812         int interactive, r;
1813
1814         assert(m);
1815         assert(message);
1816         assert(unit_name);
1817         assert(w >= 0);
1818         assert(w <= _INHIBIT_WHAT_MAX);
1819
1820         r = sd_bus_message_read(message, "b", &interactive);
1821         if (r < 0)
1822                 return r;
1823
1824         log_debug_elogind("%s called with action '%s', sleep '%s' (%sinteractive)",
1825                           __FUNCTION__, action, sleep_verb,
1826                           interactive ? "" : "NOT ");
1827         /* Don't allow multiple jobs being executed at the same time */
1828         if (m->action_what)
1829                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1830
1831         if (sleep_verb) {
1832                 r = can_sleep(sleep_verb);
1833                 if (r < 0)
1834                         return r;
1835
1836                 if (r == 0)
1837                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1838         }
1839
1840         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1841                                   action_ignore_inhibit, error);
1842         log_debug_elogind("verify_shutdown_creds() returned %d", r);
1843         if (r != 0)
1844                 return r;
1845
1846         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1847         if (r < 0)
1848                 return r;
1849
1850         return sd_bus_reply_method_return(message, NULL);
1851 }
1852
1853 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1854         Manager *m = userdata;
1855
1856         log_debug_elogind("%s called", __FUNCTION__);
1857         return method_do_shutdown_or_sleep(
1858                         m, message,
1859                         SPECIAL_POWEROFF_TARGET,
1860                         INHIBIT_SHUTDOWN,
1861                         "org.freedesktop.login1.power-off",
1862                         "org.freedesktop.login1.power-off-multiple-sessions",
1863                         "org.freedesktop.login1.power-off-ignore-inhibit",
1864                         NULL,
1865                         error);
1866 }
1867
1868 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1869         Manager *m = userdata;
1870
1871         log_debug_elogind("%s called", __FUNCTION__);
1872         return method_do_shutdown_or_sleep(
1873                         m, message,
1874                         SPECIAL_REBOOT_TARGET,
1875                         INHIBIT_SHUTDOWN,
1876                         "org.freedesktop.login1.reboot",
1877                         "org.freedesktop.login1.reboot-multiple-sessions",
1878                         "org.freedesktop.login1.reboot-ignore-inhibit",
1879                         NULL,
1880                         error);
1881 }
1882
1883 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1884         Manager *m = userdata;
1885
1886         log_debug_elogind("%s called", __FUNCTION__);
1887         return method_do_shutdown_or_sleep(
1888                         m, message,
1889                         SPECIAL_SUSPEND_TARGET,
1890                         INHIBIT_SLEEP,
1891                         "org.freedesktop.login1.suspend",
1892                         "org.freedesktop.login1.suspend-multiple-sessions",
1893                         "org.freedesktop.login1.suspend-ignore-inhibit",
1894                         "suspend",
1895                         error);
1896 }
1897 #endif // 0
1898
1899 static int nologin_timeout_handler(
1900                         sd_event_source *s,
1901                         uint64_t usec,
1902                         void *userdata) {
1903
1904         Manager *m = userdata;
1905         int r;
1906
1907         log_info("Creating /run/nologin, blocking further logins...");
1908
1909         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1910         if (r < 0)
1911                 log_error_errno(r, "Failed to create /run/nologin: %m");
1912         else
1913                 m->unlink_nologin = true;
1914
1915         return 0;
1916 }
1917
1918 static int update_schedule_file(Manager *m) {
1919         _cleanup_free_ char *temp_path = NULL;
1920         _cleanup_fclose_ FILE *f = NULL;
1921         int r;
1922
1923         assert(m);
1924
1925         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1926         if (r < 0)
1927                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1928
1929         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1930         if (r < 0)
1931                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1932
1933         (void) fchmod(fileno(f), 0644);
1934
1935         fprintf(f,
1936                 "USEC="USEC_FMT"\n"
1937                 "WARN_WALL=%i\n"
1938                 "MODE=%s\n",
1939                 m->scheduled_shutdown_timeout,
1940                 m->enable_wall_messages,
1941                 m->scheduled_shutdown_type);
1942
1943         if (!isempty(m->wall_message)) {
1944                 _cleanup_free_ char *t;
1945
1946                 t = cescape(m->wall_message);
1947                 if (!t) {
1948                         r = -ENOMEM;
1949                         goto fail;
1950                 }
1951
1952                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1953         }
1954
1955         r = fflush_and_check(f);
1956         if (r < 0)
1957                 goto fail;
1958
1959         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1960                 r = -errno;
1961                 goto fail;
1962         }
1963
1964         return 0;
1965
1966 fail:
1967         (void) unlink(temp_path);
1968         (void) unlink("/run/systemd/shutdown/scheduled");
1969
1970         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
1971 }
1972
1973 #if 0 /// elogind has its own variant in elogind-dbus.c
1974 static int manager_scheduled_shutdown_handler(
1975                         sd_event_source *s,
1976                         uint64_t usec,
1977                         void *userdata) {
1978
1979         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1980         Manager *m = userdata;
1981         const char *target;
1982         int r;
1983
1984         assert(m);
1985
1986         if (isempty(m->scheduled_shutdown_type))
1987                 return 0;
1988
1989         if (streq(m->scheduled_shutdown_type, "halt"))
1990                 target = SPECIAL_HALT_TARGET;
1991         else if (streq(m->scheduled_shutdown_type, "poweroff"))
1992                 target = SPECIAL_POWEROFF_TARGET;
1993         else
1994                 target = SPECIAL_REBOOT_TARGET;
1995
1996         r = execute_shutdown_or_sleep(m, 0, target, &error);
1997         if (r < 0)
1998                 return log_error_errno(r, "Unable to execute transition to %s: %m", target);
1999
2000         return 0;
2001 }
2002 #endif // 0
2003
2004 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2005         Manager *m = userdata;
2006         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2007         const char *action_multiple_sessions = NULL;
2008         const char *action_ignore_inhibit = NULL;
2009         const char *action = NULL;
2010         uint64_t elapse;
2011         char *type;
2012         int r;
2013
2014         assert(m);
2015         assert(message);
2016
2017         log_debug_elogind("%s called", __FUNCTION__);
2018         r = sd_bus_message_read(message, "st", &type, &elapse);
2019         if (r < 0)
2020                 return r;
2021
2022         if (startswith(type, "dry-")) {
2023                 type += 4;
2024                 m->shutdown_dry_run = true;
2025         }
2026
2027         if (streq(type, "reboot")) {
2028                 action = "org.freedesktop.login1.reboot";
2029                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2030                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2031         } else if (streq(type, "halt")) {
2032                 action = "org.freedesktop.login1.halt";
2033                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2034                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2035         } else if (streq(type, "poweroff")) {
2036                 action = "org.freedesktop.login1.power-off";
2037                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2038                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2039         } else
2040                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2041
2042         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2043                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2044         if (r != 0)
2045                 return r;
2046
2047         if (m->scheduled_shutdown_timeout_source) {
2048                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2049                 if (r < 0)
2050                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2051
2052                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2053                 if (r < 0)
2054                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2055         } else {
2056                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2057                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2058                 if (r < 0)
2059                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2060         }
2061
2062         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2063         if (r < 0) {
2064                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2065                 return log_oom();
2066         }
2067
2068         if (m->nologin_timeout_source) {
2069                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2070                 if (r < 0)
2071                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2072
2073                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2074                 if (r < 0)
2075                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2076         } else {
2077                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2078                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2079                 if (r < 0)
2080                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2081         }
2082
2083         m->scheduled_shutdown_timeout = elapse;
2084
2085         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2086         if (r >= 0) {
2087                 const char *tty = NULL;
2088
2089                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2090                 (void) sd_bus_creds_get_tty(creds, &tty);
2091
2092                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2093                 if (r < 0) {
2094                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2095                         return log_oom();
2096                 }
2097         }
2098
2099         r = manager_setup_wall_message_timer(m);
2100         if (r < 0)
2101                 return r;
2102
2103         r = update_schedule_file(m);
2104         if (r < 0)
2105                 return r;
2106
2107         return sd_bus_reply_method_return(message, NULL);
2108 }
2109
2110 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2111         Manager *m = userdata;
2112         bool cancelled;
2113 #if 1 /// elogind needs to construct the message to allow extra wall messages
2114         _cleanup_free_ char *l = NULL;
2115 #endif // 1
2116
2117         assert(m);
2118         assert(message);
2119
2120         log_debug_elogind("%s called", __FUNCTION__);
2121         cancelled = m->scheduled_shutdown_type != NULL;
2122         reset_scheduled_shutdown(m);
2123
2124         if (cancelled) {
2125                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2126                 const char *tty = NULL;
2127                 uid_t uid = 0;
2128                 int r;
2129
2130                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2131                 if (r >= 0) {
2132                         (void) sd_bus_creds_get_uid(creds, &uid);
2133                         (void) sd_bus_creds_get_tty(creds, &tty);
2134                 }
2135
2136 #if 0 /// elogind wants to allow extra cancellation messages
2137                 utmp_wall("The system shutdown has been cancelled",
2138                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2139 #else
2140                 r = asprintf(&l, "%s%sThe system shutdown has been cancelled!",
2141                              strempty(m->wall_message),
2142                              isempty(m->wall_message) ? "" : "\n");
2143                 if (r < 0) {
2144                         log_oom();
2145                         return 0;
2146                 }
2147
2148                 utmp_wall(l, uid_to_name(uid), tty, logind_wall_tty_filter, m);
2149 #endif // 0
2150         }
2151
2152         return sd_bus_reply_method_return(message, "b", cancelled);
2153 }
2154
2155 #if 0 /// elogind has its own variant in elogind-dbus.c
2156 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2157         Manager *m = userdata;
2158
2159         log_debug_elogind("%s called", __FUNCTION__);
2160         return method_do_shutdown_or_sleep(
2161                         m, message,
2162                         SPECIAL_HIBERNATE_TARGET,
2163                         INHIBIT_SLEEP,
2164                         "org.freedesktop.login1.hibernate",
2165                         "org.freedesktop.login1.hibernate-multiple-sessions",
2166                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2167                         "hibernate",
2168                         error);
2169 }
2170
2171 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2172         Manager *m = userdata;
2173
2174         log_debug_elogind("%s called", __FUNCTION__);
2175         return method_do_shutdown_or_sleep(
2176                         m, message,
2177                         SPECIAL_HYBRID_SLEEP_TARGET,
2178                         INHIBIT_SLEEP,
2179                         "org.freedesktop.login1.hibernate",
2180                         "org.freedesktop.login1.hibernate-multiple-sessions",
2181                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2182                         "hybrid-sleep",
2183                         error);
2184 }
2185 #endif // 0
2186
2187 static int method_can_shutdown_or_sleep(
2188                 Manager *m,
2189                 sd_bus_message *message,
2190                 InhibitWhat w,
2191                 const char *action,
2192                 const char *action_multiple_sessions,
2193                 const char *action_ignore_inhibit,
2194                 const char *sleep_verb,
2195                 sd_bus_error *error) {
2196
2197         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2198         bool multiple_sessions, challenge, blocked;
2199         const char *result = NULL;
2200         uid_t uid;
2201         int r;
2202
2203         assert(m);
2204         assert(message);
2205         assert(w >= 0);
2206         assert(w <= _INHIBIT_WHAT_MAX);
2207         assert(action);
2208         assert(action_multiple_sessions);
2209         assert(action_ignore_inhibit);
2210
2211         if (sleep_verb) {
2212 #if 0 /// elogind needs to have the manager being passed
2213                 r = can_sleep(sleep_verb);
2214 #else
2215                 r = can_sleep(m, sleep_verb);
2216 #endif // 0
2217                 if (r < 0)
2218                         return r;
2219                 if (r == 0)
2220                         return sd_bus_reply_method_return(message, "s", "na");
2221         }
2222
2223         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2224         if (r < 0)
2225                 return r;
2226
2227         r = sd_bus_creds_get_euid(creds, &uid);
2228         if (r < 0)
2229                 return r;
2230
2231         r = have_multiple_sessions(m, uid);
2232         if (r < 0)
2233                 return r;
2234
2235         multiple_sessions = r > 0;
2236         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2237
2238         if (multiple_sessions) {
2239                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2240                 if (r < 0)
2241                         return r;
2242
2243                 if (r > 0)
2244                         result = "yes";
2245                 else if (challenge)
2246                         result = "challenge";
2247                 else
2248                         result = "no";
2249         }
2250
2251         if (blocked) {
2252                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2253                 if (r < 0)
2254                         return r;
2255
2256                 if (r > 0 && !result)
2257                         result = "yes";
2258                 else if (challenge && (!result || streq(result, "yes")))
2259                         result = "challenge";
2260                 else
2261                         result = "no";
2262         }
2263
2264         if (!multiple_sessions && !blocked) {
2265                 /* If neither inhibit nor multiple sessions
2266                  * apply then just check the normal policy */
2267
2268                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2269                 if (r < 0)
2270                         return r;
2271
2272                 if (r > 0)
2273                         result = "yes";
2274                 else if (challenge)
2275                         result = "challenge";
2276                 else
2277                         result = "no";
2278         }
2279
2280         return sd_bus_reply_method_return(message, "s", result);
2281 }
2282
2283 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2284         Manager *m = userdata;
2285
2286         return method_can_shutdown_or_sleep(
2287                         m, message,
2288                         INHIBIT_SHUTDOWN,
2289                         "org.freedesktop.login1.power-off",
2290                         "org.freedesktop.login1.power-off-multiple-sessions",
2291                         "org.freedesktop.login1.power-off-ignore-inhibit",
2292                         NULL,
2293                         error);
2294 }
2295
2296 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2297         Manager *m = userdata;
2298
2299         return method_can_shutdown_or_sleep(
2300                         m, message,
2301                         INHIBIT_SHUTDOWN,
2302                         "org.freedesktop.login1.reboot",
2303                         "org.freedesktop.login1.reboot-multiple-sessions",
2304                         "org.freedesktop.login1.reboot-ignore-inhibit",
2305                         NULL,
2306                         error);
2307 }
2308
2309 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2310         Manager *m = userdata;
2311
2312         return method_can_shutdown_or_sleep(
2313                         m, message,
2314                         INHIBIT_SLEEP,
2315                         "org.freedesktop.login1.suspend",
2316                         "org.freedesktop.login1.suspend-multiple-sessions",
2317                         "org.freedesktop.login1.suspend-ignore-inhibit",
2318                         "suspend",
2319                         error);
2320 }
2321
2322 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2323         Manager *m = userdata;
2324
2325         return method_can_shutdown_or_sleep(
2326                         m, message,
2327                         INHIBIT_SLEEP,
2328                         "org.freedesktop.login1.hibernate",
2329                         "org.freedesktop.login1.hibernate-multiple-sessions",
2330                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2331                         "hibernate",
2332                         error);
2333 }
2334
2335 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2336         Manager *m = userdata;
2337
2338         return method_can_shutdown_or_sleep(
2339                         m, message,
2340                         INHIBIT_SLEEP,
2341                         "org.freedesktop.login1.hibernate",
2342                         "org.freedesktop.login1.hibernate-multiple-sessions",
2343                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2344                         "hybrid-sleep",
2345                         error);
2346 }
2347
2348 static int property_get_reboot_to_firmware_setup(
2349                 sd_bus *bus,
2350                 const char *path,
2351                 const char *interface,
2352                 const char *property,
2353                 sd_bus_message *reply,
2354                 void *userdata,
2355                 sd_bus_error *error) {
2356 #if 0 /// elogind does not support EFI
2357         int r;
2358
2359         assert(bus);
2360         assert(reply);
2361         assert(userdata);
2362
2363         r = efi_get_reboot_to_firmware();
2364         if (r < 0 && r != -EOPNOTSUPP)
2365                 return r;
2366
2367         return sd_bus_message_append(reply, "b", r > 0);
2368 #else
2369         return sd_bus_message_append(reply, "b", false);
2370 #endif // 0
2371 }
2372
2373 static int method_set_reboot_to_firmware_setup(
2374                 sd_bus_message *message,
2375                 void *userdata,
2376                 sd_bus_error *error) {
2377
2378         int b, r;
2379         Manager *m = userdata;
2380
2381         assert(message);
2382         assert(m);
2383
2384         r = sd_bus_message_read(message, "b", &b);
2385         if (r < 0)
2386                 return r;
2387
2388         r = bus_verify_polkit_async(message,
2389                                     CAP_SYS_ADMIN,
2390                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2391                                     NULL,
2392                                     false,
2393                                     UID_INVALID,
2394                                     &m->polkit_registry,
2395                                     error);
2396         if (r < 0)
2397                 return r;
2398         if (r == 0)
2399                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2400
2401 #if 0 /// elogind does not support EFI
2402         r = efi_set_reboot_to_firmware(b);
2403         if (r < 0)
2404                 return r;
2405 #endif // 0
2406
2407         return sd_bus_reply_method_return(message, NULL);
2408 }
2409
2410 static int method_can_reboot_to_firmware_setup(
2411                 sd_bus_message *message,
2412                 void *userdata,
2413                 sd_bus_error *error) {
2414
2415 #if 0 /// elogind does not support EFI
2416         int r;
2417         bool challenge;
2418         const char *result;
2419         Manager *m = userdata;
2420
2421         assert(message);
2422         assert(m);
2423
2424         r = efi_reboot_to_firmware_supported();
2425         if (r == -EOPNOTSUPP)
2426                 return sd_bus_reply_method_return(message, "s", "na");
2427         else if (r < 0)
2428                 return r;
2429
2430         r = bus_test_polkit(message,
2431                             CAP_SYS_ADMIN,
2432                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2433                             NULL,
2434                             UID_INVALID,
2435                             &challenge,
2436                             error);
2437         if (r < 0)
2438                 return r;
2439
2440         if (r > 0)
2441                 result = "yes";
2442         else if (challenge)
2443                 result = "challenge";
2444         else
2445                 result = "no";
2446
2447         return sd_bus_reply_method_return(message, "s", result);
2448 #else
2449         return sd_bus_reply_method_return(message, "s", "no");
2450 #endif // 0
2451 }
2452
2453 static int method_set_wall_message(
2454                 sd_bus_message *message,
2455                 void *userdata,
2456                 sd_bus_error *error) {
2457
2458         int r;
2459         Manager *m = userdata;
2460         char *wall_message;
2461         int enable_wall_messages;
2462
2463         assert(message);
2464         assert(m);
2465
2466         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2467         if (r < 0)
2468                 return r;
2469
2470 #if 0 /// elogind only calls this for shutdown/reboot, which already needs authorization.
2471         r = bus_verify_polkit_async(message,
2472                                     CAP_SYS_ADMIN,
2473                                     "org.freedesktop.login1.set-wall-message",
2474                                     NULL,
2475                                     false,
2476                                     UID_INVALID,
2477                                     &m->polkit_registry,
2478                                     error);
2479         if (r < 0)
2480                 return r;
2481         if (r == 0)
2482                 return 1; /* Will call us back */
2483 #endif // 0
2484
2485         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2486         if (r < 0)
2487                 return log_oom();
2488
2489         m->enable_wall_messages = enable_wall_messages;
2490
2491         return sd_bus_reply_method_return(message, NULL);
2492 }
2493
2494 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2495         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2496         const char *who, *why, *what, *mode;
2497         _cleanup_free_ char *id = NULL;
2498         _cleanup_close_ int fifo_fd = -1;
2499         Manager *m = userdata;
2500         Inhibitor *i = NULL;
2501         InhibitMode mm;
2502         InhibitWhat w;
2503         pid_t pid;
2504         uid_t uid;
2505         int r;
2506
2507         assert(message);
2508         assert(m);
2509
2510         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2511         if (r < 0)
2512                 return r;
2513
2514         w = inhibit_what_from_string(what);
2515         if (w <= 0)
2516                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2517
2518         mm = inhibit_mode_from_string(mode);
2519         if (mm < 0)
2520                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2521
2522         /* Delay is only supported for shutdown/sleep */
2523         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2524                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2525
2526         /* Don't allow taking delay locks while we are already
2527          * executing the operation. We shouldn't create the impression
2528          * that the lock was successful if the machine is about to go
2529          * down/suspend any moment. */
2530         if (m->action_what & w)
2531                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2532
2533         r = bus_verify_polkit_async(
2534                         message,
2535                         CAP_SYS_BOOT,
2536                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2537                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2538                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2539                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2540                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2541                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2542                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2543                         NULL,
2544                         false,
2545                         UID_INVALID,
2546                         &m->polkit_registry,
2547                         error);
2548         if (r < 0)
2549                 return r;
2550         if (r == 0)
2551                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2552
2553         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2554         if (r < 0)
2555                 return r;
2556
2557         r = sd_bus_creds_get_euid(creds, &uid);
2558         if (r < 0)
2559                 return r;
2560
2561         r = sd_bus_creds_get_pid(creds, &pid);
2562         if (r < 0)
2563                 return r;
2564
2565         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2566                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2567
2568         do {
2569                 id = mfree(id);
2570
2571                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2572                         return -ENOMEM;
2573
2574         } while (hashmap_get(m->inhibitors, id));
2575
2576         r = manager_add_inhibitor(m, id, &i);
2577         if (r < 0)
2578                 return r;
2579
2580         i->what = w;
2581         i->mode = mm;
2582         i->pid = pid;
2583         i->uid = uid;
2584         i->why = strdup(why);
2585         i->who = strdup(who);
2586
2587         if (!i->why || !i->who) {
2588                 r = -ENOMEM;
2589                 goto fail;
2590         }
2591
2592         fifo_fd = inhibitor_create_fifo(i);
2593         if (fifo_fd < 0) {
2594                 r = fifo_fd;
2595                 goto fail;
2596         }
2597
2598         inhibitor_start(i);
2599
2600         return sd_bus_reply_method_return(message, "h", fifo_fd);
2601
2602 fail:
2603         if (i)
2604                 inhibitor_free(i);
2605
2606         return r;
2607 }
2608
2609 const sd_bus_vtable manager_vtable[] = {
2610         SD_BUS_VTABLE_START(0),
2611
2612         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2613         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2614
2615 #if 0 /// UNNEEDED by elogind
2616         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2617 #endif // 0
2618         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2619         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2620         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2621         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2622         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2623         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2624         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2625         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2626         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2627         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2628         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2629         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2630         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2631         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2632         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2633         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2634         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2635         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2636         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2637         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2638         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2639         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2640         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2641         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2642         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2643         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2644         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2645         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2646         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2647
2648         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2649         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2650         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2651         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2652         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2653         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2654         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2655         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2656         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2657         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2658         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2659         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2660         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2661         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2662         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2663         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2664         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2665         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2666         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2667         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2668         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2669         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2670         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2671         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2672         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2673         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2674         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2675         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2676         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2677         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2678         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2679         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2680         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2681         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2682         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2683         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2684         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2685         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2689
2690         SD_BUS_SIGNAL("SessionNew", "so", 0),
2691         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2692         SD_BUS_SIGNAL("UserNew", "uo", 0),
2693         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2694         SD_BUS_SIGNAL("SeatNew", "so", 0),
2695         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2696         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2697         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2698
2699         SD_BUS_VTABLE_END
2700 };
2701
2702 #if 0 /// UNNEEDED by elogind
2703 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2704         int r = 0;
2705
2706         assert(s);
2707         assert(unit);
2708
2709         if (!s->started)
2710                 return r;
2711
2712         if (streq(result, "done"))
2713                 r = session_send_create_reply(s, NULL);
2714         else {
2715                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2716
2717                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2718                 r = session_send_create_reply(s, &e);
2719         }
2720
2721         return r;
2722 }
2723
2724 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2725         const char *path, *result, *unit;
2726         Manager *m = userdata;
2727         Session *session;
2728         uint32_t id;
2729         User *user;
2730         int r;
2731
2732         assert(message);
2733         assert(m);
2734
2735         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2736         if (r < 0) {
2737                 bus_log_parse_error(r);
2738                 return 0;
2739         }
2740
2741         if (m->action_job && streq(m->action_job, path)) {
2742                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2743
2744                 /* Tell people that they now may take a lock again */
2745                 send_prepare_for(m, m->action_what, false);
2746
2747                 m->action_job = mfree(m->action_job);
2748                 m->action_unit = NULL;
2749                 m->action_what = 0;
2750                 return 0;
2751         }
2752
2753         session = hashmap_get(m->session_units, unit);
2754         if (session && streq_ptr(path, session->scope_job)) {
2755                 session->scope_job = mfree(session->scope_job);
2756                 session_jobs_reply(session, unit, result);
2757
2758                 session_save(session);
2759                 user_save(session->user);
2760                 session_add_to_gc_queue(session);
2761         }
2762
2763         user = hashmap_get(m->user_units, unit);
2764         if (user &&
2765             (streq_ptr(path, user->service_job) ||
2766              streq_ptr(path, user->slice_job))) {
2767
2768                 if (streq_ptr(path, user->service_job))
2769                         user->service_job = mfree(user->service_job);
2770
2771                 if (streq_ptr(path, user->slice_job))
2772                         user->slice_job = mfree(user->slice_job);
2773
2774                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2775                         session_jobs_reply(session, unit, result);
2776
2777                 user_save(user);
2778                 user_add_to_gc_queue(user);
2779         }
2780
2781         return 0;
2782 }
2783
2784 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2785         const char *path, *unit;
2786         Manager *m = userdata;
2787         Session *session;
2788         User *user;
2789         int r;
2790
2791         assert(message);
2792         assert(m);
2793
2794         r = sd_bus_message_read(message, "so", &unit, &path);
2795         if (r < 0) {
2796                 bus_log_parse_error(r);
2797                 return 0;
2798         }
2799
2800         session = hashmap_get(m->session_units, unit);
2801         if (session)
2802                 session_add_to_gc_queue(session);
2803
2804         user = hashmap_get(m->user_units, unit);
2805         if (user)
2806                 user_add_to_gc_queue(user);
2807
2808         return 0;
2809 }
2810
2811 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2812         _cleanup_free_ char *unit = NULL;
2813         Manager *m = userdata;
2814         const char *path;
2815         Session *session;
2816         User *user;
2817         int r;
2818
2819         assert(message);
2820         assert(m);
2821
2822         path = sd_bus_message_get_path(message);
2823         if (!path)
2824                 return 0;
2825
2826         r = unit_name_from_dbus_path(path, &unit);
2827         if (r == -EINVAL) /* not a unit */
2828                 return 0;
2829         if (r < 0) {
2830                 log_oom();
2831                 return 0;
2832         }
2833
2834         session = hashmap_get(m->session_units, unit);
2835         if (session)
2836                 session_add_to_gc_queue(session);
2837
2838         user = hashmap_get(m->user_units, unit);
2839         if (user)
2840                 user_add_to_gc_queue(user);
2841
2842         return 0;
2843 }
2844
2845 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2846         Manager *m = userdata;
2847         Session *session;
2848         Iterator i;
2849         int b, r;
2850
2851         assert(message);
2852         assert(m);
2853
2854         r = sd_bus_message_read(message, "b", &b);
2855         if (r < 0) {
2856                 bus_log_parse_error(r);
2857                 return 0;
2858         }
2859
2860         if (b)
2861                 return 0;
2862
2863         /* systemd finished reloading, let's recheck all our sessions */
2864         log_debug("System manager has been reloaded, rechecking sessions...");
2865
2866         HASHMAP_FOREACH(session, m->sessions, i)
2867                 session_add_to_gc_queue(session);
2868
2869         return 0;
2870 }
2871 #endif // 0
2872
2873 int manager_send_changed(Manager *manager, const char *property, ...) {
2874         char **l;
2875
2876         assert(manager);
2877
2878         l = strv_from_stdarg_alloca(property);
2879
2880         return sd_bus_emit_properties_changed_strv(
2881                         manager->bus,
2882                         "/org/freedesktop/login1",
2883                         "org.freedesktop.login1.Manager",
2884                         l);
2885 }
2886
2887 #if 0 /// UNNEEDED by elogind
2888 static int strdup_job(sd_bus_message *reply, char **job) {
2889         const char *j;
2890         char *copy;
2891         int r;
2892
2893         r = sd_bus_message_read(reply, "o", &j);
2894         if (r < 0)
2895                 return r;
2896
2897         copy = strdup(j);
2898         if (!copy)
2899                 return -ENOMEM;
2900
2901         *job = copy;
2902         return 1;
2903 }
2904
2905 int manager_start_slice(
2906                 Manager *manager,
2907                 const char *slice,
2908                 const char *description,
2909                 const char *after,
2910                 const char *after2,
2911                 uint64_t tasks_max,
2912                 sd_bus_error *error,
2913                 char **job) {
2914
2915         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2916         int r;
2917
2918         assert(manager);
2919         assert(slice);
2920         assert(job);
2921
2922         r = sd_bus_message_new_method_call(
2923                         manager->bus,
2924                         &m,
2925                         "org.freedesktop.systemd1",
2926                         "/org/freedesktop/systemd1",
2927                         "org.freedesktop.systemd1.Manager",
2928                         "StartTransientUnit");
2929         if (r < 0)
2930                 return r;
2931
2932         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2933         if (r < 0)
2934                 return r;
2935
2936         r = sd_bus_message_open_container(m, 'a', "(sv)");
2937         if (r < 0)
2938                 return r;
2939
2940         if (!isempty(description)) {
2941                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2942                 if (r < 0)
2943                         return r;
2944         }
2945
2946         if (!isempty(after)) {
2947                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2948                 if (r < 0)
2949                         return r;
2950         }
2951
2952         if (!isempty(after2)) {
2953                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2954                 if (r < 0)
2955                         return r;
2956         }
2957
2958         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
2959         if (r < 0)
2960                 return r;
2961
2962         r = sd_bus_message_close_container(m);
2963         if (r < 0)
2964                 return r;
2965
2966         r = sd_bus_message_append(m, "a(sa(sv))", 0);
2967         if (r < 0)
2968                 return r;
2969
2970         r = sd_bus_call(manager->bus, m, 0, error, &reply);
2971         if (r < 0)
2972                 return r;
2973
2974         return strdup_job(reply, job);
2975 }
2976
2977 int manager_start_scope(
2978                 Manager *manager,
2979                 const char *scope,
2980                 pid_t pid,
2981                 const char *slice,
2982                 const char *description,
2983                 const char *after,
2984                 const char *after2,
2985                 uint64_t tasks_max,
2986                 sd_bus_error *error,
2987                 char **job) {
2988
2989         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2990         int r;
2991
2992         assert(manager);
2993         assert(scope);
2994         assert(pid > 1);
2995         assert(job);
2996
2997         r = sd_bus_message_new_method_call(
2998                         manager->bus,
2999                         &m,
3000                         "org.freedesktop.systemd1",
3001                         "/org/freedesktop/systemd1",
3002                         "org.freedesktop.systemd1.Manager",
3003                         "StartTransientUnit");
3004         if (r < 0)
3005                 return r;
3006
3007         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3008         if (r < 0)
3009                 return r;
3010
3011         r = sd_bus_message_open_container(m, 'a', "(sv)");
3012         if (r < 0)
3013                 return r;
3014
3015         if (!isempty(slice)) {
3016                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3017                 if (r < 0)
3018                         return r;
3019         }
3020
3021         if (!isempty(description)) {
3022                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3023                 if (r < 0)
3024                         return r;
3025         }
3026
3027         if (!isempty(after)) {
3028                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3029                 if (r < 0)
3030                         return r;
3031         }
3032
3033         if (!isempty(after2)) {
3034                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3035                 if (r < 0)
3036                         return r;
3037         }
3038
3039         /* cgroup empty notification is not available in containers
3040          * currently. To make this less problematic, let's shorten the
3041          * stop timeout for sessions, so that we don't wait
3042          * forever. */
3043
3044         /* Make sure that the session shells are terminated with
3045          * SIGHUP since bash and friends tend to ignore SIGTERM */
3046         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3047         if (r < 0)
3048                 return r;
3049
3050         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3051         if (r < 0)
3052                 return r;
3053
3054         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3055         if (r < 0)
3056                 return r;
3057
3058         r = sd_bus_message_close_container(m);
3059         if (r < 0)
3060                 return r;
3061
3062         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3063         if (r < 0)
3064                 return r;
3065
3066         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3067         if (r < 0)
3068                 return r;
3069
3070         return strdup_job(reply, job);
3071 }
3072
3073 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3074         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3075         int r;
3076
3077         assert(manager);
3078         assert(unit);
3079         assert(job);
3080
3081         r = sd_bus_call_method(
3082                         manager->bus,
3083                         "org.freedesktop.systemd1",
3084                         "/org/freedesktop/systemd1",
3085                         "org.freedesktop.systemd1.Manager",
3086                         "StartUnit",
3087                         error,
3088                         &reply,
3089                         "ss", unit, "replace");
3090         if (r < 0)
3091                 return r;
3092
3093         return strdup_job(reply, job);
3094 }
3095
3096 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3097         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3098         int r;
3099
3100         assert(manager);
3101         assert(unit);
3102         assert(job);
3103
3104         r = sd_bus_call_method(
3105                         manager->bus,
3106                         "org.freedesktop.systemd1",
3107                         "/org/freedesktop/systemd1",
3108                         "org.freedesktop.systemd1.Manager",
3109                         "StopUnit",
3110                         error,
3111                         &reply,
3112                         "ss", unit, "fail");
3113         if (r < 0) {
3114                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3115                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3116
3117                         *job = NULL;
3118                         sd_bus_error_free(error);
3119                         return 0;
3120                 }
3121
3122                 return r;
3123         }
3124
3125         return strdup_job(reply, job);
3126 }
3127
3128 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3129         _cleanup_free_ char *path = NULL;
3130         int r;
3131
3132         assert(manager);
3133         assert(scope);
3134
3135         path = unit_dbus_path_from_name(scope);
3136         if (!path)
3137                 return -ENOMEM;
3138
3139         r = sd_bus_call_method(
3140                         manager->bus,
3141                         "org.freedesktop.systemd1",
3142                         path,
3143                         "org.freedesktop.systemd1.Scope",
3144                         "Abandon",
3145                         error,
3146                         NULL,
3147                         NULL);
3148         if (r < 0) {
3149                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3150                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3151                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3152                         sd_bus_error_free(error);
3153                         return 0;
3154                 }
3155
3156                 return r;
3157         }
3158
3159         return 1;
3160 }
3161
3162 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3163         assert(manager);
3164         assert(unit);
3165
3166         return sd_bus_call_method(
3167                         manager->bus,
3168                         "org.freedesktop.systemd1",
3169                         "/org/freedesktop/systemd1",
3170                         "org.freedesktop.systemd1.Manager",
3171                         "KillUnit",
3172                         error,
3173                         NULL,
3174                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3175 }
3176
3177 int manager_unit_is_active(Manager *manager, const char *unit) {
3178         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3179         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3180         _cleanup_free_ char *path = NULL;
3181         const char *state;
3182         int r;
3183
3184         assert(manager);
3185         assert(unit);
3186
3187         path = unit_dbus_path_from_name(unit);
3188         if (!path)
3189                 return -ENOMEM;
3190
3191         r = sd_bus_get_property(
3192                         manager->bus,
3193                         "org.freedesktop.systemd1",
3194                         path,
3195                         "org.freedesktop.systemd1.Unit",
3196                         "ActiveState",
3197                         &error,
3198                         &reply,
3199                         "s");
3200         if (r < 0) {
3201                 /* systemd might have droppped off momentarily, let's
3202                  * not make this an error */
3203                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3204                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3205                         return true;
3206
3207                 /* If the unit is already unloaded then it's not
3208                  * active */
3209                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3210                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3211                         return false;
3212
3213                 return r;
3214         }
3215
3216         r = sd_bus_message_read(reply, "s", &state);
3217         if (r < 0)
3218                 return -EINVAL;
3219
3220         return !streq(state, "inactive") && !streq(state, "failed");
3221 }
3222
3223 int manager_job_is_active(Manager *manager, const char *path) {
3224         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3225         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3226         int r;
3227
3228         assert(manager);
3229         assert(path);
3230
3231         r = sd_bus_get_property(
3232                         manager->bus,
3233                         "org.freedesktop.systemd1",
3234                         path,
3235                         "org.freedesktop.systemd1.Job",
3236                         "State",
3237                         &error,
3238                         &reply,
3239                         "s");
3240         if (r < 0) {
3241                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3242                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3243                         return true;
3244
3245                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3246                         return false;
3247
3248                 return r;
3249         }
3250
3251         /* We don't actually care about the state really. The fact
3252          * that we could read the job state is enough for us */
3253
3254         return true;
3255 }
3256 #endif // 0