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         /* Don't allow multiple jobs being executed at the same time */
1997         if (m->action_what) {
1998                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
1999                 return -EALREADY;
2000         }
2001
2002         r = execute_shutdown_or_sleep(m, INHIBIT_SHUTDOWN, target, &error);
2003         if (r < 0)
2004                 return log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2005
2006         return 0;
2007 }
2008 #endif // 0
2009
2010 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2011         Manager *m = userdata;
2012         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2013         const char *action_multiple_sessions = NULL;
2014         const char *action_ignore_inhibit = NULL;
2015         const char *action = NULL;
2016         uint64_t elapse;
2017         char *type;
2018         int r;
2019
2020         assert(m);
2021         assert(message);
2022
2023         log_debug_elogind("%s called", __FUNCTION__);
2024         r = sd_bus_message_read(message, "st", &type, &elapse);
2025         if (r < 0)
2026                 return r;
2027
2028         if (startswith(type, "dry-")) {
2029                 type += 4;
2030                 m->shutdown_dry_run = true;
2031         }
2032
2033         if (streq(type, "reboot")) {
2034                 action = "org.freedesktop.login1.reboot";
2035                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2036                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2037         } else if (streq(type, "halt")) {
2038                 action = "org.freedesktop.login1.halt";
2039                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2040                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2041         } else if (streq(type, "poweroff")) {
2042                 action = "org.freedesktop.login1.power-off";
2043                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2044                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2045         } else
2046                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2047
2048         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2049                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2050         if (r != 0)
2051                 return r;
2052
2053         if (m->scheduled_shutdown_timeout_source) {
2054                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2055                 if (r < 0)
2056                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2057
2058                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2059                 if (r < 0)
2060                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2061         } else {
2062                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2063                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2064                 if (r < 0)
2065                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2066         }
2067
2068         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2069         if (r < 0) {
2070                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2071                 return log_oom();
2072         }
2073
2074         if (m->nologin_timeout_source) {
2075                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2076                 if (r < 0)
2077                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2078
2079                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2080                 if (r < 0)
2081                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2082         } else {
2083                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2084                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2085                 if (r < 0)
2086                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2087         }
2088
2089         m->scheduled_shutdown_timeout = elapse;
2090
2091         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2092         if (r >= 0) {
2093                 const char *tty = NULL;
2094
2095                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2096                 (void) sd_bus_creds_get_tty(creds, &tty);
2097
2098                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2099                 if (r < 0) {
2100                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2101                         return log_oom();
2102                 }
2103         }
2104
2105         r = manager_setup_wall_message_timer(m);
2106         if (r < 0)
2107                 return r;
2108
2109         r = update_schedule_file(m);
2110         if (r < 0)
2111                 return r;
2112
2113         return sd_bus_reply_method_return(message, NULL);
2114 }
2115
2116 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2117         Manager *m = userdata;
2118         bool cancelled;
2119 #if 1 /// elogind needs to construct the message to allow extra wall messages
2120         _cleanup_free_ char *l = NULL;
2121 #endif // 1
2122
2123         assert(m);
2124         assert(message);
2125
2126         log_debug_elogind("%s called", __FUNCTION__);
2127         cancelled = m->scheduled_shutdown_type != NULL;
2128         reset_scheduled_shutdown(m);
2129
2130         if (cancelled) {
2131                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2132                 const char *tty = NULL;
2133                 uid_t uid = 0;
2134                 int r;
2135
2136                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2137                 if (r >= 0) {
2138                         (void) sd_bus_creds_get_uid(creds, &uid);
2139                         (void) sd_bus_creds_get_tty(creds, &tty);
2140                 }
2141
2142 #if 0 /// elogind wants to allow extra cancellation messages
2143                 utmp_wall("The system shutdown has been cancelled",
2144                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2145 #else
2146                 r = asprintf(&l, "%s%sThe system shutdown has been cancelled!",
2147                              strempty(m->wall_message),
2148                              isempty(m->wall_message) ? "" : "\n");
2149                 if (r < 0) {
2150                         log_oom();
2151                         return 0;
2152                 }
2153
2154                 utmp_wall(l, uid_to_name(uid), tty, logind_wall_tty_filter, m);
2155 #endif // 0
2156         }
2157
2158         return sd_bus_reply_method_return(message, "b", cancelled);
2159 }
2160
2161 #if 0 /// elogind has its own variant in elogind-dbus.c
2162 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2163         Manager *m = userdata;
2164
2165         log_debug_elogind("%s called", __FUNCTION__);
2166         return method_do_shutdown_or_sleep(
2167                         m, message,
2168                         SPECIAL_HIBERNATE_TARGET,
2169                         INHIBIT_SLEEP,
2170                         "org.freedesktop.login1.hibernate",
2171                         "org.freedesktop.login1.hibernate-multiple-sessions",
2172                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2173                         "hibernate",
2174                         error);
2175 }
2176
2177 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2178         Manager *m = userdata;
2179
2180         log_debug_elogind("%s called", __FUNCTION__);
2181         return method_do_shutdown_or_sleep(
2182                         m, message,
2183                         SPECIAL_HYBRID_SLEEP_TARGET,
2184                         INHIBIT_SLEEP,
2185                         "org.freedesktop.login1.hibernate",
2186                         "org.freedesktop.login1.hibernate-multiple-sessions",
2187                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2188                         "hybrid-sleep",
2189                         error);
2190 }
2191 #endif // 0
2192
2193 static int method_can_shutdown_or_sleep(
2194                 Manager *m,
2195                 sd_bus_message *message,
2196                 InhibitWhat w,
2197                 const char *action,
2198                 const char *action_multiple_sessions,
2199                 const char *action_ignore_inhibit,
2200                 const char *sleep_verb,
2201                 sd_bus_error *error) {
2202
2203         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2204         bool multiple_sessions, challenge, blocked;
2205         const char *result = NULL;
2206         uid_t uid;
2207         int r;
2208
2209         assert(m);
2210         assert(message);
2211         assert(w >= 0);
2212         assert(w <= _INHIBIT_WHAT_MAX);
2213         assert(action);
2214         assert(action_multiple_sessions);
2215         assert(action_ignore_inhibit);
2216
2217         if (sleep_verb) {
2218 #if 0 /// elogind needs to have the manager being passed
2219                 r = can_sleep(sleep_verb);
2220 #else
2221                 r = can_sleep(m, sleep_verb);
2222 #endif // 0
2223                 if (r < 0)
2224                         return r;
2225                 if (r == 0)
2226                         return sd_bus_reply_method_return(message, "s", "na");
2227         }
2228
2229         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2230         if (r < 0)
2231                 return r;
2232
2233         r = sd_bus_creds_get_euid(creds, &uid);
2234         if (r < 0)
2235                 return r;
2236
2237         r = have_multiple_sessions(m, uid);
2238         if (r < 0)
2239                 return r;
2240
2241         multiple_sessions = r > 0;
2242         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2243
2244         if (multiple_sessions) {
2245                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2246                 if (r < 0)
2247                         return r;
2248
2249                 if (r > 0)
2250                         result = "yes";
2251                 else if (challenge)
2252                         result = "challenge";
2253                 else
2254                         result = "no";
2255         }
2256
2257         if (blocked) {
2258                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2259                 if (r < 0)
2260                         return r;
2261
2262                 if (r > 0 && !result)
2263                         result = "yes";
2264                 else if (challenge && (!result || streq(result, "yes")))
2265                         result = "challenge";
2266                 else
2267                         result = "no";
2268         }
2269
2270         if (!multiple_sessions && !blocked) {
2271                 /* If neither inhibit nor multiple sessions
2272                  * apply then just check the normal policy */
2273
2274                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2275                 if (r < 0)
2276                         return r;
2277
2278                 if (r > 0)
2279                         result = "yes";
2280                 else if (challenge)
2281                         result = "challenge";
2282                 else
2283                         result = "no";
2284         }
2285
2286         return sd_bus_reply_method_return(message, "s", result);
2287 }
2288
2289 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2290         Manager *m = userdata;
2291
2292         return method_can_shutdown_or_sleep(
2293                         m, message,
2294                         INHIBIT_SHUTDOWN,
2295                         "org.freedesktop.login1.power-off",
2296                         "org.freedesktop.login1.power-off-multiple-sessions",
2297                         "org.freedesktop.login1.power-off-ignore-inhibit",
2298                         NULL,
2299                         error);
2300 }
2301
2302 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2303         Manager *m = userdata;
2304
2305         return method_can_shutdown_or_sleep(
2306                         m, message,
2307                         INHIBIT_SHUTDOWN,
2308                         "org.freedesktop.login1.reboot",
2309                         "org.freedesktop.login1.reboot-multiple-sessions",
2310                         "org.freedesktop.login1.reboot-ignore-inhibit",
2311                         NULL,
2312                         error);
2313 }
2314
2315 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2316         Manager *m = userdata;
2317
2318         return method_can_shutdown_or_sleep(
2319                         m, message,
2320                         INHIBIT_SLEEP,
2321                         "org.freedesktop.login1.suspend",
2322                         "org.freedesktop.login1.suspend-multiple-sessions",
2323                         "org.freedesktop.login1.suspend-ignore-inhibit",
2324                         "suspend",
2325                         error);
2326 }
2327
2328 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2329         Manager *m = userdata;
2330
2331         return method_can_shutdown_or_sleep(
2332                         m, message,
2333                         INHIBIT_SLEEP,
2334                         "org.freedesktop.login1.hibernate",
2335                         "org.freedesktop.login1.hibernate-multiple-sessions",
2336                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2337                         "hibernate",
2338                         error);
2339 }
2340
2341 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2342         Manager *m = userdata;
2343
2344         return method_can_shutdown_or_sleep(
2345                         m, message,
2346                         INHIBIT_SLEEP,
2347                         "org.freedesktop.login1.hibernate",
2348                         "org.freedesktop.login1.hibernate-multiple-sessions",
2349                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2350                         "hybrid-sleep",
2351                         error);
2352 }
2353
2354 static int property_get_reboot_to_firmware_setup(
2355                 sd_bus *bus,
2356                 const char *path,
2357                 const char *interface,
2358                 const char *property,
2359                 sd_bus_message *reply,
2360                 void *userdata,
2361                 sd_bus_error *error) {
2362 #if 0 /// elogind does not support EFI
2363         int r;
2364
2365         assert(bus);
2366         assert(reply);
2367         assert(userdata);
2368
2369         r = efi_get_reboot_to_firmware();
2370         if (r < 0 && r != -EOPNOTSUPP)
2371                 return r;
2372
2373         return sd_bus_message_append(reply, "b", r > 0);
2374 #else
2375         return sd_bus_message_append(reply, "b", false);
2376 #endif // 0
2377 }
2378
2379 static int method_set_reboot_to_firmware_setup(
2380                 sd_bus_message *message,
2381                 void *userdata,
2382                 sd_bus_error *error) {
2383
2384         int b, r;
2385         Manager *m = userdata;
2386
2387         assert(message);
2388         assert(m);
2389
2390         r = sd_bus_message_read(message, "b", &b);
2391         if (r < 0)
2392                 return r;
2393
2394         r = bus_verify_polkit_async(message,
2395                                     CAP_SYS_ADMIN,
2396                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2397                                     NULL,
2398                                     false,
2399                                     UID_INVALID,
2400                                     &m->polkit_registry,
2401                                     error);
2402         if (r < 0)
2403                 return r;
2404         if (r == 0)
2405                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2406
2407 #if 0 /// elogind does not support EFI
2408         r = efi_set_reboot_to_firmware(b);
2409         if (r < 0)
2410                 return r;
2411 #endif // 0
2412
2413         return sd_bus_reply_method_return(message, NULL);
2414 }
2415
2416 static int method_can_reboot_to_firmware_setup(
2417                 sd_bus_message *message,
2418                 void *userdata,
2419                 sd_bus_error *error) {
2420
2421 #if 0 /// elogind does not support EFI
2422         int r;
2423         bool challenge;
2424         const char *result;
2425         Manager *m = userdata;
2426
2427         assert(message);
2428         assert(m);
2429
2430         r = efi_reboot_to_firmware_supported();
2431         if (r == -EOPNOTSUPP)
2432                 return sd_bus_reply_method_return(message, "s", "na");
2433         else if (r < 0)
2434                 return r;
2435
2436         r = bus_test_polkit(message,
2437                             CAP_SYS_ADMIN,
2438                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2439                             NULL,
2440                             UID_INVALID,
2441                             &challenge,
2442                             error);
2443         if (r < 0)
2444                 return r;
2445
2446         if (r > 0)
2447                 result = "yes";
2448         else if (challenge)
2449                 result = "challenge";
2450         else
2451                 result = "no";
2452
2453         return sd_bus_reply_method_return(message, "s", result);
2454 #else
2455         return sd_bus_reply_method_return(message, "s", "no");
2456 #endif // 0
2457 }
2458
2459 static int method_set_wall_message(
2460                 sd_bus_message *message,
2461                 void *userdata,
2462                 sd_bus_error *error) {
2463
2464         int r;
2465         Manager *m = userdata;
2466         char *wall_message;
2467         int enable_wall_messages;
2468
2469         assert(message);
2470         assert(m);
2471
2472         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2473         if (r < 0)
2474                 return r;
2475
2476 #if 0 /// elogind only calls this for shutdown/reboot, which already needs authorization.
2477         r = bus_verify_polkit_async(message,
2478                                     CAP_SYS_ADMIN,
2479                                     "org.freedesktop.login1.set-wall-message",
2480                                     NULL,
2481                                     false,
2482                                     UID_INVALID,
2483                                     &m->polkit_registry,
2484                                     error);
2485         if (r < 0)
2486                 return r;
2487         if (r == 0)
2488                 return 1; /* Will call us back */
2489 #endif // 0
2490
2491         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2492         if (r < 0)
2493                 return log_oom();
2494
2495         m->enable_wall_messages = enable_wall_messages;
2496
2497         return sd_bus_reply_method_return(message, NULL);
2498 }
2499
2500 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2501         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2502         const char *who, *why, *what, *mode;
2503         _cleanup_free_ char *id = NULL;
2504         _cleanup_close_ int fifo_fd = -1;
2505         Manager *m = userdata;
2506         Inhibitor *i = NULL;
2507         InhibitMode mm;
2508         InhibitWhat w;
2509         pid_t pid;
2510         uid_t uid;
2511         int r;
2512
2513         assert(message);
2514         assert(m);
2515
2516         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2517         if (r < 0)
2518                 return r;
2519
2520         w = inhibit_what_from_string(what);
2521         if (w <= 0)
2522                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2523
2524         mm = inhibit_mode_from_string(mode);
2525         if (mm < 0)
2526                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2527
2528         /* Delay is only supported for shutdown/sleep */
2529         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2530                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2531
2532         /* Don't allow taking delay locks while we are already
2533          * executing the operation. We shouldn't create the impression
2534          * that the lock was successful if the machine is about to go
2535          * down/suspend any moment. */
2536         if (m->action_what & w)
2537                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2538
2539         r = bus_verify_polkit_async(
2540                         message,
2541                         CAP_SYS_BOOT,
2542                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2543                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2544                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2545                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2546                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2547                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2548                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2549                         NULL,
2550                         false,
2551                         UID_INVALID,
2552                         &m->polkit_registry,
2553                         error);
2554         if (r < 0)
2555                 return r;
2556         if (r == 0)
2557                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2558
2559         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2560         if (r < 0)
2561                 return r;
2562
2563         r = sd_bus_creds_get_euid(creds, &uid);
2564         if (r < 0)
2565                 return r;
2566
2567         r = sd_bus_creds_get_pid(creds, &pid);
2568         if (r < 0)
2569                 return r;
2570
2571         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2572                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2573
2574         do {
2575                 id = mfree(id);
2576
2577                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2578                         return -ENOMEM;
2579
2580         } while (hashmap_get(m->inhibitors, id));
2581
2582         r = manager_add_inhibitor(m, id, &i);
2583         if (r < 0)
2584                 return r;
2585
2586         i->what = w;
2587         i->mode = mm;
2588         i->pid = pid;
2589         i->uid = uid;
2590         i->why = strdup(why);
2591         i->who = strdup(who);
2592
2593         if (!i->why || !i->who) {
2594                 r = -ENOMEM;
2595                 goto fail;
2596         }
2597
2598         fifo_fd = inhibitor_create_fifo(i);
2599         if (fifo_fd < 0) {
2600                 r = fifo_fd;
2601                 goto fail;
2602         }
2603
2604         inhibitor_start(i);
2605
2606         return sd_bus_reply_method_return(message, "h", fifo_fd);
2607
2608 fail:
2609         if (i)
2610                 inhibitor_free(i);
2611
2612         return r;
2613 }
2614
2615 const sd_bus_vtable manager_vtable[] = {
2616         SD_BUS_VTABLE_START(0),
2617
2618         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2619         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2620
2621 #if 0 /// UNNEEDED by elogind
2622         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2623 #endif // 0
2624         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2625         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2626         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2627         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2628         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2629         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2630         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2631         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2632         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2633         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2634         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2635         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2636         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2637         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2638         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2639         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2640         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2641         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2642         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2643         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2644         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2645         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2646         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2647         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2648         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2649         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2650         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2651         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2652         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2653
2654         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2655         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2656         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2657         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2658         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2659         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2660         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2661         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2662         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2663         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2664         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2665         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2666         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2667         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2668         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2669         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2670         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2671         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2672         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2673         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2674         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2675         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2676         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2677         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2678         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2679         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2680         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2681         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2682         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2683         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2684         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2685         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2689         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2690         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2691         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2692         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2693         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2694         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2695
2696         SD_BUS_SIGNAL("SessionNew", "so", 0),
2697         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2698         SD_BUS_SIGNAL("UserNew", "uo", 0),
2699         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2700         SD_BUS_SIGNAL("SeatNew", "so", 0),
2701         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2702         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2703         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2704
2705         SD_BUS_VTABLE_END
2706 };
2707
2708 #if 0 /// UNNEEDED by elogind
2709 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2710         int r = 0;
2711
2712         assert(s);
2713         assert(unit);
2714
2715         if (!s->started)
2716                 return r;
2717
2718         if (streq(result, "done"))
2719                 r = session_send_create_reply(s, NULL);
2720         else {
2721                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2722
2723                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2724                 r = session_send_create_reply(s, &e);
2725         }
2726
2727         return r;
2728 }
2729
2730 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2731         const char *path, *result, *unit;
2732         Manager *m = userdata;
2733         Session *session;
2734         uint32_t id;
2735         User *user;
2736         int r;
2737
2738         assert(message);
2739         assert(m);
2740
2741         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2742         if (r < 0) {
2743                 bus_log_parse_error(r);
2744                 return 0;
2745         }
2746
2747         if (m->action_job && streq(m->action_job, path)) {
2748                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2749
2750                 /* Tell people that they now may take a lock again */
2751                 send_prepare_for(m, m->action_what, false);
2752
2753                 m->action_job = mfree(m->action_job);
2754                 m->action_unit = NULL;
2755                 m->action_what = 0;
2756                 return 0;
2757         }
2758
2759         session = hashmap_get(m->session_units, unit);
2760         if (session && streq_ptr(path, session->scope_job)) {
2761                 session->scope_job = mfree(session->scope_job);
2762                 session_jobs_reply(session, unit, result);
2763
2764                 session_save(session);
2765                 user_save(session->user);
2766                 session_add_to_gc_queue(session);
2767         }
2768
2769         user = hashmap_get(m->user_units, unit);
2770         if (user &&
2771             (streq_ptr(path, user->service_job) ||
2772              streq_ptr(path, user->slice_job))) {
2773
2774                 if (streq_ptr(path, user->service_job))
2775                         user->service_job = mfree(user->service_job);
2776
2777                 if (streq_ptr(path, user->slice_job))
2778                         user->slice_job = mfree(user->slice_job);
2779
2780                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2781                         session_jobs_reply(session, unit, result);
2782
2783                 user_save(user);
2784                 user_add_to_gc_queue(user);
2785         }
2786
2787         return 0;
2788 }
2789
2790 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2791         const char *path, *unit;
2792         Manager *m = userdata;
2793         Session *session;
2794         User *user;
2795         int r;
2796
2797         assert(message);
2798         assert(m);
2799
2800         r = sd_bus_message_read(message, "so", &unit, &path);
2801         if (r < 0) {
2802                 bus_log_parse_error(r);
2803                 return 0;
2804         }
2805
2806         session = hashmap_get(m->session_units, unit);
2807         if (session)
2808                 session_add_to_gc_queue(session);
2809
2810         user = hashmap_get(m->user_units, unit);
2811         if (user)
2812                 user_add_to_gc_queue(user);
2813
2814         return 0;
2815 }
2816
2817 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2818         _cleanup_free_ char *unit = NULL;
2819         Manager *m = userdata;
2820         const char *path;
2821         Session *session;
2822         User *user;
2823         int r;
2824
2825         assert(message);
2826         assert(m);
2827
2828         path = sd_bus_message_get_path(message);
2829         if (!path)
2830                 return 0;
2831
2832         r = unit_name_from_dbus_path(path, &unit);
2833         if (r == -EINVAL) /* not a unit */
2834                 return 0;
2835         if (r < 0) {
2836                 log_oom();
2837                 return 0;
2838         }
2839
2840         session = hashmap_get(m->session_units, unit);
2841         if (session)
2842                 session_add_to_gc_queue(session);
2843
2844         user = hashmap_get(m->user_units, unit);
2845         if (user)
2846                 user_add_to_gc_queue(user);
2847
2848         return 0;
2849 }
2850
2851 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2852         Manager *m = userdata;
2853         Session *session;
2854         Iterator i;
2855         int b, r;
2856
2857         assert(message);
2858         assert(m);
2859
2860         r = sd_bus_message_read(message, "b", &b);
2861         if (r < 0) {
2862                 bus_log_parse_error(r);
2863                 return 0;
2864         }
2865
2866         if (b)
2867                 return 0;
2868
2869         /* systemd finished reloading, let's recheck all our sessions */
2870         log_debug("System manager has been reloaded, rechecking sessions...");
2871
2872         HASHMAP_FOREACH(session, m->sessions, i)
2873                 session_add_to_gc_queue(session);
2874
2875         return 0;
2876 }
2877 #endif // 0
2878
2879 int manager_send_changed(Manager *manager, const char *property, ...) {
2880         char **l;
2881
2882         assert(manager);
2883
2884         l = strv_from_stdarg_alloca(property);
2885
2886         return sd_bus_emit_properties_changed_strv(
2887                         manager->bus,
2888                         "/org/freedesktop/login1",
2889                         "org.freedesktop.login1.Manager",
2890                         l);
2891 }
2892
2893 #if 0 /// UNNEEDED by elogind
2894 static int strdup_job(sd_bus_message *reply, char **job) {
2895         const char *j;
2896         char *copy;
2897         int r;
2898
2899         r = sd_bus_message_read(reply, "o", &j);
2900         if (r < 0)
2901                 return r;
2902
2903         copy = strdup(j);
2904         if (!copy)
2905                 return -ENOMEM;
2906
2907         *job = copy;
2908         return 1;
2909 }
2910
2911 int manager_start_slice(
2912                 Manager *manager,
2913                 const char *slice,
2914                 const char *description,
2915                 const char *after,
2916                 const char *after2,
2917                 uint64_t tasks_max,
2918                 sd_bus_error *error,
2919                 char **job) {
2920
2921         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2922         int r;
2923
2924         assert(manager);
2925         assert(slice);
2926         assert(job);
2927
2928         r = sd_bus_message_new_method_call(
2929                         manager->bus,
2930                         &m,
2931                         "org.freedesktop.systemd1",
2932                         "/org/freedesktop/systemd1",
2933                         "org.freedesktop.systemd1.Manager",
2934                         "StartTransientUnit");
2935         if (r < 0)
2936                 return r;
2937
2938         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2939         if (r < 0)
2940                 return r;
2941
2942         r = sd_bus_message_open_container(m, 'a', "(sv)");
2943         if (r < 0)
2944                 return r;
2945
2946         if (!isempty(description)) {
2947                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2948                 if (r < 0)
2949                         return r;
2950         }
2951
2952         if (!isempty(after)) {
2953                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2954                 if (r < 0)
2955                         return r;
2956         }
2957
2958         if (!isempty(after2)) {
2959                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2960                 if (r < 0)
2961                         return r;
2962         }
2963
2964         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
2965         if (r < 0)
2966                 return r;
2967
2968         r = sd_bus_message_close_container(m);
2969         if (r < 0)
2970                 return r;
2971
2972         r = sd_bus_message_append(m, "a(sa(sv))", 0);
2973         if (r < 0)
2974                 return r;
2975
2976         r = sd_bus_call(manager->bus, m, 0, error, &reply);
2977         if (r < 0)
2978                 return r;
2979
2980         return strdup_job(reply, job);
2981 }
2982
2983 int manager_start_scope(
2984                 Manager *manager,
2985                 const char *scope,
2986                 pid_t pid,
2987                 const char *slice,
2988                 const char *description,
2989                 const char *after,
2990                 const char *after2,
2991                 uint64_t tasks_max,
2992                 sd_bus_error *error,
2993                 char **job) {
2994
2995         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2996         int r;
2997
2998         assert(manager);
2999         assert(scope);
3000         assert(pid > 1);
3001         assert(job);
3002
3003         r = sd_bus_message_new_method_call(
3004                         manager->bus,
3005                         &m,
3006                         "org.freedesktop.systemd1",
3007                         "/org/freedesktop/systemd1",
3008                         "org.freedesktop.systemd1.Manager",
3009                         "StartTransientUnit");
3010         if (r < 0)
3011                 return r;
3012
3013         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3014         if (r < 0)
3015                 return r;
3016
3017         r = sd_bus_message_open_container(m, 'a', "(sv)");
3018         if (r < 0)
3019                 return r;
3020
3021         if (!isempty(slice)) {
3022                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3023                 if (r < 0)
3024                         return r;
3025         }
3026
3027         if (!isempty(description)) {
3028                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3029                 if (r < 0)
3030                         return r;
3031         }
3032
3033         if (!isempty(after)) {
3034                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3035                 if (r < 0)
3036                         return r;
3037         }
3038
3039         if (!isempty(after2)) {
3040                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3041                 if (r < 0)
3042                         return r;
3043         }
3044
3045         /* cgroup empty notification is not available in containers
3046          * currently. To make this less problematic, let's shorten the
3047          * stop timeout for sessions, so that we don't wait
3048          * forever. */
3049
3050         /* Make sure that the session shells are terminated with
3051          * SIGHUP since bash and friends tend to ignore SIGTERM */
3052         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3053         if (r < 0)
3054                 return r;
3055
3056         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3057         if (r < 0)
3058                 return r;
3059
3060         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3061         if (r < 0)
3062                 return r;
3063
3064         r = sd_bus_message_close_container(m);
3065         if (r < 0)
3066                 return r;
3067
3068         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3069         if (r < 0)
3070                 return r;
3071
3072         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3073         if (r < 0)
3074                 return r;
3075
3076         return strdup_job(reply, job);
3077 }
3078
3079 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3080         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3081         int r;
3082
3083         assert(manager);
3084         assert(unit);
3085         assert(job);
3086
3087         r = sd_bus_call_method(
3088                         manager->bus,
3089                         "org.freedesktop.systemd1",
3090                         "/org/freedesktop/systemd1",
3091                         "org.freedesktop.systemd1.Manager",
3092                         "StartUnit",
3093                         error,
3094                         &reply,
3095                         "ss", unit, "replace");
3096         if (r < 0)
3097                 return r;
3098
3099         return strdup_job(reply, job);
3100 }
3101
3102 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3103         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3104         int r;
3105
3106         assert(manager);
3107         assert(unit);
3108         assert(job);
3109
3110         r = sd_bus_call_method(
3111                         manager->bus,
3112                         "org.freedesktop.systemd1",
3113                         "/org/freedesktop/systemd1",
3114                         "org.freedesktop.systemd1.Manager",
3115                         "StopUnit",
3116                         error,
3117                         &reply,
3118                         "ss", unit, "fail");
3119         if (r < 0) {
3120                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3121                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3122
3123                         *job = NULL;
3124                         sd_bus_error_free(error);
3125                         return 0;
3126                 }
3127
3128                 return r;
3129         }
3130
3131         return strdup_job(reply, job);
3132 }
3133
3134 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3135         _cleanup_free_ char *path = NULL;
3136         int r;
3137
3138         assert(manager);
3139         assert(scope);
3140
3141         path = unit_dbus_path_from_name(scope);
3142         if (!path)
3143                 return -ENOMEM;
3144
3145         r = sd_bus_call_method(
3146                         manager->bus,
3147                         "org.freedesktop.systemd1",
3148                         path,
3149                         "org.freedesktop.systemd1.Scope",
3150                         "Abandon",
3151                         error,
3152                         NULL,
3153                         NULL);
3154         if (r < 0) {
3155                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3156                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3157                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3158                         sd_bus_error_free(error);
3159                         return 0;
3160                 }
3161
3162                 return r;
3163         }
3164
3165         return 1;
3166 }
3167
3168 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3169         assert(manager);
3170         assert(unit);
3171
3172         return sd_bus_call_method(
3173                         manager->bus,
3174                         "org.freedesktop.systemd1",
3175                         "/org/freedesktop/systemd1",
3176                         "org.freedesktop.systemd1.Manager",
3177                         "KillUnit",
3178                         error,
3179                         NULL,
3180                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3181 }
3182
3183 int manager_unit_is_active(Manager *manager, const char *unit) {
3184         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3185         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3186         _cleanup_free_ char *path = NULL;
3187         const char *state;
3188         int r;
3189
3190         assert(manager);
3191         assert(unit);
3192
3193         path = unit_dbus_path_from_name(unit);
3194         if (!path)
3195                 return -ENOMEM;
3196
3197         r = sd_bus_get_property(
3198                         manager->bus,
3199                         "org.freedesktop.systemd1",
3200                         path,
3201                         "org.freedesktop.systemd1.Unit",
3202                         "ActiveState",
3203                         &error,
3204                         &reply,
3205                         "s");
3206         if (r < 0) {
3207                 /* systemd might have droppped off momentarily, let's
3208                  * not make this an error */
3209                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3210                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3211                         return true;
3212
3213                 /* If the unit is already unloaded then it's not
3214                  * active */
3215                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3216                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3217                         return false;
3218
3219                 return r;
3220         }
3221
3222         r = sd_bus_message_read(reply, "s", &state);
3223         if (r < 0)
3224                 return -EINVAL;
3225
3226         return !streq(state, "inactive") && !streq(state, "failed");
3227 }
3228
3229 int manager_job_is_active(Manager *manager, const char *path) {
3230         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3231         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3232         int r;
3233
3234         assert(manager);
3235         assert(path);
3236
3237         r = sd_bus_get_property(
3238                         manager->bus,
3239                         "org.freedesktop.systemd1",
3240                         path,
3241                         "org.freedesktop.systemd1.Job",
3242                         "State",
3243                         &error,
3244                         &reply,
3245                         "s");
3246         if (r < 0) {
3247                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3248                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3249                         return true;
3250
3251                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3252                         return false;
3253
3254                 return r;
3255         }
3256
3257         /* We don't actually care about the state really. The fact
3258          * that we could read the job state is enough for us */
3259
3260         return true;
3261 }
3262 #endif // 0