src/login/logind-dbus.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2011 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <pwd.h>
  26
  27 #include "sd-messages.h"
  28 #include "strv.h"
  29 #include "mkdir.h"
  30 #include "path-util.h"
  31 #include "special.h"
  32 #include "sleep-config.h"
  33 #include "fileio-label.h"
  34 #include "unit-name.h"
  35 #include "audit.h"
  36 #include "bus-util.h"
  37 #include "bus-error.h"
  38 #include "bus-common-errors.h"
  39 #include "udev-util.h"
  40 #include "selinux-util.h"
  41 #include "logind.h"
  42
  43 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  44         _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
  45         Session *session;
  46         int r;
  47
  48         assert(m);
  49         assert(message);
  50         assert(ret);
  51
  52         if (isempty(name)) {
  53                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  54                 if (r < 0)
  55                         return r;
  56
  57                 r = sd_bus_creds_get_session(creds, &name);
  58                 if (r < 0)
  59                         return r;
  60         }
  61
  62         session = hashmap_get(m->sessions, name);
  63         if (!session)
  64                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  65
  66         *ret = session;
  67         return 0;
  68 }
  69
  70 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
  71         User *user;
  72         int r;
  73
  74         assert(m);
  75         assert(message);
  76         assert(ret);
  77
  78         if (uid == UID_INVALID) {
  79                 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
  80
  81                 /* Note that we get the owner UID of the session, not the actual client UID here! */
  82                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
  83                 if (r < 0)
  84                         return r;
  85
  86                 r = sd_bus_creds_get_owner_uid(creds, &uid);
  87                 if (r < 0)
  88                         return r;
  89         }
  90
  91         user = hashmap_get(m->users, UID_TO_PTR(uid));
  92         if (!user)
  93                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid);
  94
  95         *ret = user;
  96         return 0;
  97 }
  98
  99 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 100         Seat *seat;
 101         int r;
 102
 103         assert(m);
 104         assert(message);
 105         assert(ret);
 106
 107         if (isempty(name)) {
 108                 Session *session;
 109
 110                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 111                 if (r < 0)
 112                         return r;
 113
 114                 seat = session->seat;
 115
 116                 if (!seat)
 117                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 118         } else {
 119                 seat = hashmap_get(m->seats, name);
 120                 if (!seat)
 121                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 122         }
 123
 124         *ret = seat;
 125         return 0;
 126 }
 127
 128 static int property_get_idle_hint(
 129                 sd_bus *bus,
 130                 const char *path,
 131                 const char *interface,
 132                 const char *property,
 133                 sd_bus_message *reply,
 134                 void *userdata,
 135                 sd_bus_error *error) {
 136
 137         Manager *m = userdata;
 138
 139         assert(bus);
 140         assert(reply);
 141         assert(m);
 142
 143         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 144 }
 145
 146 static int property_get_idle_since_hint(
 147                 sd_bus *bus,
 148                 const char *path,
 149                 const char *interface,
 150                 const char *property,
 151                 sd_bus_message *reply,
 152                 void *userdata,
 153                 sd_bus_error *error) {
 154
 155         Manager *m = userdata;
 156         dual_timestamp t;
 157
 158         assert(bus);
 159         assert(reply);
 160         assert(m);
 161
 162         manager_get_idle_hint(m, &t);
 163
 164         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 165 }
 166
 167 static int property_get_inhibited(
 168                 sd_bus *bus,
 169                 const char *path,
 170                 const char *interface,
 171                 const char *property,
 172                 sd_bus_message *reply,
 173                 void *userdata,
 174                 sd_bus_error *error) {
 175
 176         Manager *m = userdata;
 177         InhibitWhat w;
 178
 179         assert(bus);
 180         assert(reply);
 181         assert(m);
 182
 183         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 184
 185         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 186 }
 187
 188 static int property_get_preparing(
 189                 sd_bus *bus,
 190                 const char *path,
 191                 const char *interface,
 192                 const char *property,
 193                 sd_bus_message *reply,
 194                 void *userdata,
 195                 sd_bus_error *error) {
 196
 197         Manager *m = userdata;
 198         bool b;
 199
 200         assert(bus);
 201         assert(reply);
 202         assert(m);
 203
 204         if (streq(property, "PreparingForShutdown"))
 205                 b = !!(m->action_what & INHIBIT_SHUTDOWN);
 206         else
 207                 b = !!(m->action_what & INHIBIT_SLEEP);
 208
 209         return sd_bus_message_append(reply, "b", b);
 210 }
 211
 212 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 213
 214 static int method_get_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 215         _cleanup_free_ char *p = NULL;
 216         Manager *m = userdata;
 217         const char *name;
 218         Session *session;
 219         int r;
 220
 221         assert(bus);
 222         assert(message);
 223         assert(m);
 224
 225         r = sd_bus_message_read(message, "s", &name);
 226         if (r < 0)
 227                 return r;
 228
 229         r = manager_get_session_from_creds(m, message, name, error, &session);
 230         if (r < 0)
 231                 return r;
 232
 233         p = session_bus_path(session);
 234         if (!p)
 235                 return -ENOMEM;
 236
 237         return sd_bus_reply_method_return(message, "o", p);
 238 }
 239
 240 static int method_get_session_by_pid(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 241         _cleanup_free_ char *p = NULL;
 242         Session *session = NULL;
 243         Manager *m = userdata;
 244         pid_t pid;
 245         int r;
 246
 247         assert(bus);
 248         assert(message);
 249         assert(m);
 250
 251         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 252
 253         r = sd_bus_message_read(message, "u", &pid);
 254         if (r < 0)
 255                 return r;
 256
 257         if (pid <= 0) {
 258                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 259                 if (r < 0)
 260                         return r;
 261         } else {
 262                 r = manager_get_session_by_pid(m, pid, &session);
 263                 if (r < 0)
 264                         return r;
 265
 266                 if (!session)
 267                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 268         }
 269
 270         p = session_bus_path(session);
 271         if (!p)
 272                 return -ENOMEM;
 273
 274         return sd_bus_reply_method_return(message, "o", p);
 275 }
 276
 277 static int method_get_user(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 278         _cleanup_free_ char *p = NULL;
 279         Manager *m = userdata;
 280         uint32_t uid;
 281         User *user;
 282         int r;
 283
 284         assert(bus);
 285         assert(message);
 286         assert(m);
 287
 288         r = sd_bus_message_read(message, "u", &uid);
 289         if (r < 0)
 290                 return r;
 291
 292         r = manager_get_user_from_creds(m, message, uid, error, &user);
 293         if (r < 0)
 294                 return r;
 295
 296         p = user_bus_path(user);
 297         if (!p)
 298                 return -ENOMEM;
 299
 300         return sd_bus_reply_method_return(message, "o", p);
 301 }
 302
 303 static int method_get_user_by_pid(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 304         _cleanup_free_ char *p = NULL;
 305         Manager *m = userdata;
 306         User *user = NULL;
 307         pid_t pid;
 308         int r;
 309
 310         assert(bus);
 311         assert(message);
 312         assert(m);
 313
 314         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 315
 316         r = sd_bus_message_read(message, "u", &pid);
 317         if (r < 0)
 318                 return r;
 319
 320         if (pid <= 0) {
 321                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 322                 if (r < 0)
 323                         return r;
 324         } else {
 325                 r = manager_get_user_by_pid(m, pid, &user);
 326                 if (r < 0)
 327                         return r;
 328                 if (!user)
 329                         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);
 330         }
 331
 332         p = user_bus_path(user);
 333         if (!p)
 334                 return -ENOMEM;
 335
 336         return sd_bus_reply_method_return(message, "o", p);
 337 }
 338
 339 static int method_get_seat(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 340         _cleanup_free_ char *p = NULL;
 341         Manager *m = userdata;
 342         const char *name;
 343         Seat *seat;
 344         int r;
 345
 346         assert(bus);
 347         assert(message);
 348         assert(m);
 349
 350         r = sd_bus_message_read(message, "s", &name);
 351         if (r < 0)
 352                 return r;
 353
 354         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 355         if (r < 0)
 356                 return r;
 357
 358         p = seat_bus_path(seat);
 359         if (!p)
 360                 return -ENOMEM;
 361
 362         return sd_bus_reply_method_return(message, "o", p);
 363 }
 364
 365 static int method_list_sessions(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 366         _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
 367         Manager *m = userdata;
 368         Session *session;
 369         Iterator i;
 370         int r;
 371
 372         assert(bus);
 373         assert(message);
 374         assert(m);
 375
 376         r = sd_bus_message_new_method_return(message, &reply);
 377         if (r < 0)
 378                 return r;
 379
 380         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 381         if (r < 0)
 382                 return r;
 383
 384         HASHMAP_FOREACH(session, m->sessions, i) {
 385                 _cleanup_free_ char *p = NULL;
 386
 387                 p = session_bus_path(session);
 388                 if (!p)
 389                         return -ENOMEM;
 390
 391                 r = sd_bus_message_append(reply, "(susso)",
 392                                           session->id,
 393                                           (uint32_t) session->user->uid,
 394                                           session->user->name,
 395                                           session->seat ? session->seat->id : "",
 396                                           p);
 397                 if (r < 0)
 398                         return r;
 399         }
 400
 401         r = sd_bus_message_close_container(reply);
 402         if (r < 0)
 403                 return r;
 404
 405         return sd_bus_send(bus, reply, NULL);
 406 }
 407
 408 static int method_list_users(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 409         _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
 410         Manager *m = userdata;
 411         User *user;
 412         Iterator i;
 413         int r;
 414
 415         assert(bus);
 416         assert(message);
 417         assert(m);
 418
 419         r = sd_bus_message_new_method_return(message, &reply);
 420         if (r < 0)
 421                 return r;
 422
 423         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 424         if (r < 0)
 425                 return r;
 426
 427         HASHMAP_FOREACH(user, m->users, i) {
 428                 _cleanup_free_ char *p = NULL;
 429
 430                 p = user_bus_path(user);
 431                 if (!p)
 432                         return -ENOMEM;
 433
 434                 r = sd_bus_message_append(reply, "(uso)",
 435                                           (uint32_t) user->uid,
 436                                           user->name,
 437                                           p);
 438                 if (r < 0)
 439                         return r;
 440         }
 441
 442         r = sd_bus_message_close_container(reply);
 443         if (r < 0)
 444                 return r;
 445
 446         return sd_bus_send(bus, reply, NULL);
 447 }
 448
 449 static int method_list_seats(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 450         _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
 451         Manager *m = userdata;
 452         Seat *seat;
 453         Iterator i;
 454         int r;
 455
 456         assert(bus);
 457         assert(message);
 458         assert(m);
 459
 460         r = sd_bus_message_new_method_return(message, &reply);
 461         if (r < 0)
 462                 return r;
 463
 464         r = sd_bus_message_open_container(reply, 'a', "(so)");
 465         if (r < 0)
 466                 return r;
 467
 468         HASHMAP_FOREACH(seat, m->seats, i) {
 469                 _cleanup_free_ char *p = NULL;
 470
 471                 p = seat_bus_path(seat);
 472                 if (!p)
 473                         return -ENOMEM;
 474
 475                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 476                 if (r < 0)
 477                         return r;
 478         }
 479
 480         r = sd_bus_message_close_container(reply);
 481         if (r < 0)
 482                 return r;
 483
 484         return sd_bus_send(bus, reply, NULL);
 485 }
 486
 487 static int method_list_inhibitors(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 488         _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
 489         Manager *m = userdata;
 490         Inhibitor *inhibitor;
 491         Iterator i;
 492         int r;
 493
 494         r = sd_bus_message_new_method_return(message, &reply);
 495         if (r < 0)
 496                 return r;
 497
 498         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 499         if (r < 0)
 500                 return r;
 501
 502         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 503
 504                 r = sd_bus_message_append(reply, "(ssssuu)",
 505                                           strempty(inhibit_what_to_string(inhibitor->what)),
 506                                           strempty(inhibitor->who),
 507                                           strempty(inhibitor->why),
 508                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 509                                           (uint32_t) inhibitor->uid,
 510                                           (uint32_t) inhibitor->pid);
 511                 if (r < 0)
 512                         return r;
 513         }
 514
 515         r = sd_bus_message_close_container(reply);
 516         if (r < 0)
 517                 return r;
 518
 519         return sd_bus_send(bus, reply, NULL);
 520 }
 521
 522 static int method_create_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 523         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 524         uint32_t uid, leader, audit_id = 0;
 525         _cleanup_free_ char *id = NULL;
 526         Session *session = NULL;
 527         Manager *m = userdata;
 528         User *user = NULL;
 529         Seat *seat = NULL;
 530         int remote;
 531         uint32_t vtnr = 0;
 532         SessionType t;
 533         SessionClass c;
 534         int r;
 535
 536         assert(bus);
 537         assert(message);
 538         assert(m);
 539
 540         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 541         if (r < 0)
 542                 return r;
 543
 544         if (leader == 1)
 545                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 546
 547         if (isempty(type))
 548                 t = _SESSION_TYPE_INVALID;
 549         else {
 550                 t = session_type_from_string(type);
 551                 if (t < 0)
 552                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 553         }
 554
 555         if (isempty(class))
 556                 c = _SESSION_CLASS_INVALID;
 557         else {
 558                 c = session_class_from_string(class);
 559                 if (c < 0)
 560                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 561         }
 562
 563         if (isempty(desktop))
 564                 desktop = NULL;
 565         else {
 566                 if (!string_is_safe(desktop))
 567                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 568         }
 569
 570         if (isempty(cseat))
 571                 seat = NULL;
 572         else {
 573                 seat = hashmap_get(m->seats, cseat);
 574                 if (!seat)
 575                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 576         }
 577
 578         if (tty_is_vc(tty)) {
 579                 int v;
 580
 581                 if (!seat)
 582                         seat = m->seat0;
 583                 else if (seat != m->seat0)
 584                         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);
 585
 586                 v = vtnr_from_tty(tty);
 587                 if (v <= 0)
 588                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 589
 590                 if (!vtnr)
 591                         vtnr = (uint32_t) v;
 592                 else if (vtnr != (uint32_t) v)
 593                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 594
 595         } else if (tty_is_console(tty)) {
 596
 597                 if (!seat)
 598                         seat = m->seat0;
 599                 else if (seat != m->seat0)
 600                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 601
 602                 if (vtnr != 0)
 603                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 604         }
 605
 606         if (seat) {
 607                 if (seat_has_vts(seat)) {
 608                         if (!vtnr || vtnr > 63)
 609                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 610                 } else {
 611                         if (vtnr != 0)
 612                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 613                 }
 614         }
 615
 616         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 617         if (r < 0)
 618                 return r;
 619
 620         if (t == _SESSION_TYPE_INVALID) {
 621                 if (!isempty(display))
 622                         t = SESSION_X11;
 623                 else if (!isempty(tty))
 624                         t = SESSION_TTY;
 625                 else
 626                         t = SESSION_UNSPECIFIED;
 627         }
 628
 629         if (c == _SESSION_CLASS_INVALID) {
 630                 if (t == SESSION_UNSPECIFIED)
 631                         c = SESSION_BACKGROUND;
 632                 else
 633                         c = SESSION_USER;
 634         }
 635
 636         if (leader <= 0) {
 637                 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
 638
 639                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 640                 if (r < 0)
 641                         return r;
 642
 643                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 644                 if (r < 0)
 645                         return r;
 646         }
 647
 648         manager_get_session_by_pid(m, leader, &session);
 649         if (session) {
 650                 _cleanup_free_ char *path = NULL;
 651                 _cleanup_close_ int fifo_fd = -1;
 652
 653                 /* Session already exists, client is probably
 654                  * something like "su" which changes uid but is still
 655                  * the same session */
 656
 657                 fifo_fd = session_create_fifo(session);
 658                 if (fifo_fd < 0)
 659                         return fifo_fd;
 660
 661                 path = session_bus_path(session);
 662                 if (!path)
 663                         return -ENOMEM;
 664
 665                 log_debug("Sending reply about an existing session: "
 666                           "id=%s object_path=%s uid=%u runtime_path=%s "
 667                           "session_fd=%d seat=%s vtnr=%u",
 668                           session->id,
 669                           path,
 670                           (uint32_t) session->user->uid,
 671                           session->user->runtime_path,
 672                           fifo_fd,
 673                           session->seat ? session->seat->id : "",
 674                           (uint32_t) session->vtnr);
 675
 676                 return sd_bus_reply_method_return(
 677                                 message, "soshusub",
 678                                 session->id,
 679                                 path,
 680                                 session->user->runtime_path,
 681                                 fifo_fd,
 682                                 (uint32_t) session->user->uid,
 683                                 session->seat ? session->seat->id : "",
 684                                 (uint32_t) session->vtnr,
 685                                 true);
 686         }
 687
 688         audit_session_from_pid(leader, &audit_id);
 689         if (audit_id > 0) {
 690                 /* Keep our session IDs and the audit session IDs in sync */
 691
 692                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 693                         return -ENOMEM;
 694
 695                 /* Wut? There's already a session by this name and we
 696                  * didn't find it above? Weird, then let's not trust
 697                  * the audit data and let's better register a new
 698                  * ID */
 699                 if (hashmap_get(m->sessions, id)) {
 700                         log_warning("Existing logind session ID %s used by new audit session, ignoring", id);
 701                         audit_id = 0;
 702
 703                         free(id);
 704                         id = NULL;
 705                 }
 706         }
 707
 708         if (!id) {
 709                 do {
 710                         free(id);
 711                         id = NULL;
 712
 713                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 714                                 return -ENOMEM;
 715
 716                 } while (hashmap_get(m->sessions, id));
 717         }
 718
 719         r = manager_add_user_by_uid(m, uid, &user);
 720         if (r < 0)
 721                 goto fail;
 722
 723         r = manager_add_session(m, id, &session);
 724         if (r < 0)
 725                 goto fail;
 726
 727         session_set_user(session, user);
 728
 729         session->leader = leader;
 730         session->audit_id = audit_id;
 731         session->type = t;
 732         session->class = c;
 733         session->remote = remote;
 734         session->vtnr = vtnr;
 735
 736         if (!isempty(tty)) {
 737                 session->tty = strdup(tty);
 738                 if (!session->tty) {
 739                         r = -ENOMEM;
 740                         goto fail;
 741                 }
 742         }
 743
 744         if (!isempty(display)) {
 745                 session->display = strdup(display);
 746                 if (!session->display) {
 747                         r = -ENOMEM;
 748                         goto fail;
 749                 }
 750         }
 751
 752         if (!isempty(remote_user)) {
 753                 session->remote_user = strdup(remote_user);
 754                 if (!session->remote_user) {
 755                         r = -ENOMEM;
 756                         goto fail;
 757                 }
 758         }
 759
 760         if (!isempty(remote_host)) {
 761                 session->remote_host = strdup(remote_host);
 762                 if (!session->remote_host) {
 763                         r = -ENOMEM;
 764                         goto fail;
 765                 }
 766         }
 767
 768         if (!isempty(service)) {
 769                 session->service = strdup(service);
 770                 if (!session->service) {
 771                         r = -ENOMEM;
 772                         goto fail;
 773                 }
 774         }
 775
 776         if (!isempty(desktop)) {
 777                 session->desktop = strdup(desktop);
 778                 if (!session->desktop) {
 779                         r = -ENOMEM;
 780                         goto fail;
 781                 }
 782         }
 783
 784         if (seat) {
 785                 r = seat_attach_session(seat, session);
 786                 if (r < 0)
 787                         goto fail;
 788         }
 789
 790         r = session_start(session);
 791         if (r < 0)
 792                 goto fail;
 793
 794         session->create_message = sd_bus_message_ref(message);
 795
 796         /* Here upstream systemd starts cgroups and the user systemd,
 797            and arranges to reply asynchronously.  We reply
 798            directly.  */
 799
 800         r = session_send_create_reply(session, NULL);
 801         if (r < 0)
 802                 goto fail;
 803
 804         session_save(session);
 805
 806         return 1;
 807
 808 fail:
 809         if (session)
 810                 session_add_to_gc_queue(session);
 811
 812         if (user)
 813                 user_add_to_gc_queue(user);
 814
 815         return r;
 816 }
 817
 818 static int method_release_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 819         Manager *m = userdata;
 820         Session *session;
 821         const char *name;
 822         int r;
 823
 824         assert(bus);
 825         assert(message);
 826         assert(m);
 827
 828         r = sd_bus_message_read(message, "s", &name);
 829         if (r < 0)
 830                 return r;
 831
 832         r = manager_get_session_from_creds(m, message, name, error, &session);
 833         if (r < 0)
 834                 return r;
 835
 836         r = session_release(session);
 837         if (r < 0)
 838                 return r;
 839
 840         return sd_bus_reply_method_return(message, NULL);
 841 }
 842
 843 static int method_activate_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 844         Manager *m = userdata;
 845         Session *session;
 846         const char *name;
 847         int r;
 848
 849         assert(bus);
 850         assert(message);
 851         assert(m);
 852
 853         r = sd_bus_message_read(message, "s", &name);
 854         if (r < 0)
 855                 return r;
 856
 857         r = manager_get_session_from_creds(m, message, name, error, &session);
 858         if (r < 0)
 859                 return r;
 860
 861         return bus_session_method_activate(bus, message, session, error);
 862 }
 863
 864 static int method_activate_session_on_seat(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 865         const char *session_name, *seat_name;
 866         Manager *m = userdata;
 867         Session *session;
 868         Seat *seat;
 869         int r;
 870
 871         assert(bus);
 872         assert(message);
 873         assert(m);
 874
 875         /* Same as ActivateSession() but refuses to work if
 876          * the seat doesn't match */
 877
 878         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 879         if (r < 0)
 880                 return r;
 881
 882         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 883         if (r < 0)
 884                 return r;
 885
 886         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 887         if (r < 0)
 888                 return r;
 889
 890         if (session->seat != seat)
 891                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 892
 893         r = session_activate(session);
 894         if (r < 0)
 895                 return r;
 896
 897         return sd_bus_reply_method_return(message, NULL);
 898 }
 899
 900 static int method_lock_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 901         Manager *m = userdata;
 902         Session *session;
 903         const char *name;
 904         int r;
 905
 906         assert(bus);
 907         assert(message);
 908         assert(m);
 909
 910         r = sd_bus_message_read(message, "s", &name);
 911         if (r < 0)
 912                 return r;
 913
 914         r = manager_get_session_from_creds(m, message, name, error, &session);
 915         if (r < 0)
 916                 return r;
 917
 918         return bus_session_method_lock(bus, message, session, error);
 919 }
 920
 921 static int method_lock_sessions(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 922         Manager *m = userdata;
 923         int r;
 924
 925         assert(bus);
 926         assert(message);
 927         assert(m);
 928
 929         r = bus_verify_polkit_async(
 930                         message,
 931                         CAP_SYS_ADMIN,
 932                         "org.freedesktop.login1.lock-sessions",
 933                         false,
 934                         UID_INVALID,
 935                         &m->polkit_registry,
 936                         error);
 937         if (r < 0)
 938                 return r;
 939         if (r == 0)
 940                 return 1; /* Will call us back */
 941
 942         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
 943         if (r < 0)
 944                 return r;
 945
 946         return sd_bus_reply_method_return(message, NULL);
 947 }
 948
 949 static int method_kill_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 950         const char *name;
 951         Manager *m = userdata;
 952         Session *session;
 953         int r;
 954
 955         assert(bus);
 956         assert(message);
 957         assert(m);
 958
 959         r = sd_bus_message_read(message, "s", &name);
 960         if (r < 0)
 961                 return r;
 962
 963         r = manager_get_session_from_creds(m, message, name, error, &session);
 964         if (r < 0)
 965                 return r;
 966
 967         return bus_session_method_kill(bus, message, session, error);
 968 }
 969
 970 static int method_kill_user(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 971         Manager *m = userdata;
 972         uint32_t uid;
 973         User *user;
 974         int r;
 975
 976         assert(bus);
 977         assert(message);
 978         assert(m);
 979
 980         r = sd_bus_message_read(message, "u", &uid);
 981         if (r < 0)
 982                 return r;
 983
 984         r = manager_get_user_from_creds(m, message, uid, error, &user);
 985         if (r < 0)
 986                 return r;
 987
 988         return bus_user_method_kill(bus, message, user, error);
 989 }
 990
 991 static int method_terminate_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
 992         Manager *m = userdata;
 993         const char *name;
 994         Session *session;
 995         int r;
 996
 997         assert(bus);
 998         assert(message);
 999         assert(m);
1000
1001         r = sd_bus_message_read(message, "s", &name);
1002         if (r < 0)
1003                 return r;
1004
1005         r = manager_get_session_from_creds(m, message, name, error, &session);
1006         if (r < 0)
1007                 return r;
1008
1009         return bus_session_method_terminate(bus, message, session, error);
1010 }
1011
1012 static int method_terminate_user(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1013         Manager *m = userdata;
1014         uint32_t uid;
1015         User *user;
1016         int r;
1017
1018         assert(bus);
1019         assert(message);
1020         assert(m);
1021
1022         r = sd_bus_message_read(message, "u", &uid);
1023         if (r < 0)
1024                 return r;
1025
1026         r = manager_get_user_from_creds(m, message, uid, error, &user);
1027         if (r < 0)
1028                 return r;
1029
1030         return bus_user_method_terminate(bus, message, user, error);
1031 }
1032
1033 static int method_terminate_seat(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1034         Manager *m = userdata;
1035         const char *name;
1036         Seat *seat;
1037         int r;
1038
1039         assert(bus);
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_seat_from_creds(m, message, name, error, &seat);
1048         if (r < 0)
1049                 return r;
1050
1051         return bus_seat_method_terminate(bus, message, seat, error);
1052 }
1053
1054 static int method_set_user_linger(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1055         _cleanup_free_ char *cc = NULL;
1056         Manager *m = userdata;
1057         int b, r;
1058         struct passwd *pw;
1059         const char *path;
1060         uint32_t uid;
1061         int interactive;
1062
1063         assert(bus);
1064         assert(message);
1065         assert(m);
1066
1067         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1068         if (r < 0)
1069                 return r;
1070
1071         if (uid == UID_INVALID) {
1072                 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
1073
1074                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1075                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1076                 if (r < 0)
1077                         return r;
1078
1079                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1080                 if (r < 0)
1081                         return r;
1082         }
1083
1084         errno = 0;
1085         pw = getpwuid(uid);
1086         if (!pw)
1087                 return errno ? -errno : -ENOENT;
1088
1089         r = bus_verify_polkit_async(
1090                         message,
1091                         CAP_SYS_ADMIN,
1092                         "org.freedesktop.login1.set-user-linger",
1093                         interactive,
1094                         UID_INVALID,
1095                         &m->polkit_registry,
1096                         error);
1097         if (r < 0)
1098                 return r;
1099         if (r == 0)
1100                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1101
1102         mkdir_p_label("/var/lib/systemd", 0755);
1103
1104         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1105         if (r < 0)
1106                 return r;
1107
1108         cc = cescape(pw->pw_name);
1109         if (!cc)
1110                 return -ENOMEM;
1111
1112         path = strjoina("/var/lib/systemd/linger/", cc);
1113         if (b) {
1114                 User *u;
1115
1116                 r = touch(path);
1117                 if (r < 0)
1118                         return r;
1119
1120                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1121                         user_start(u);
1122
1123         } else {
1124                 User *u;
1125
1126                 r = unlink(path);
1127                 if (r < 0 && errno != ENOENT)
1128                         return -errno;
1129
1130                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1131                 if (u)
1132                         user_add_to_gc_queue(u);
1133         }
1134
1135         return sd_bus_reply_method_return(message, NULL);
1136 }
1137
1138 static int trigger_device(Manager *m, struct udev_device *d) {
1139         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1140         struct udev_list_entry *first, *item;
1141         int r;
1142
1143         assert(m);
1144
1145         e = udev_enumerate_new(m->udev);
1146         if (!e)
1147                 return -ENOMEM;
1148
1149         if (d) {
1150                 r = udev_enumerate_add_match_parent(e, d);
1151                 if (r < 0)
1152                         return r;
1153         }
1154
1155         r = udev_enumerate_scan_devices(e);
1156         if (r < 0)
1157                 return r;
1158
1159         first = udev_enumerate_get_list_entry(e);
1160         udev_list_entry_foreach(item, first) {
1161                 _cleanup_free_ char *t = NULL;
1162                 const char *p;
1163
1164                 p = udev_list_entry_get_name(item);
1165
1166                 t = strappend(p, "/uevent");
1167                 if (!t)
1168                         return -ENOMEM;
1169
1170                 write_string_file(t, "change");
1171         }
1172
1173         return 0;
1174 }
1175
1176 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1177         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1178         _cleanup_free_ char *rule = NULL, *file = NULL;
1179         const char *id_for_seat;
1180         int r;
1181
1182         assert(m);
1183         assert(seat);
1184         assert(sysfs);
1185
1186         d = udev_device_new_from_syspath(m->udev, sysfs);
1187         if (!d)
1188                 return -ENODEV;
1189
1190         if (!udev_device_has_tag(d, "seat"))
1191                 return -ENODEV;
1192
1193         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1194         if (!id_for_seat)
1195                 return -ENODEV;
1196
1197         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1198                 return -ENOMEM;
1199
1200         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1201                 return -ENOMEM;
1202
1203         mkdir_p_label("/etc/udev/rules.d", 0755);
1204         mac_selinux_init("/etc");
1205         r = write_string_file_atomic_label(file, rule);
1206         if (r < 0)
1207                 return r;
1208
1209         return trigger_device(m, d);
1210 }
1211
1212 static int flush_devices(Manager *m) {
1213         _cleanup_closedir_ DIR *d;
1214
1215         assert(m);
1216
1217         d = opendir("/etc/udev/rules.d");
1218         if (!d) {
1219                 if (errno != ENOENT)
1220                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1221         } else {
1222                 struct dirent *de;
1223
1224                 while ((de = readdir(d))) {
1225
1226                         if (!dirent_is_file(de))
1227                                 continue;
1228
1229                         if (!startswith(de->d_name, "72-seat-"))
1230                                 continue;
1231
1232                         if (!endswith(de->d_name, ".rules"))
1233                                 continue;
1234
1235                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1236                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1237                 }
1238         }
1239
1240         return trigger_device(m, NULL);
1241 }
1242
1243 static int method_attach_device(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1244         const char *sysfs, *seat;
1245         Manager *m = userdata;
1246         int interactive, r;
1247
1248         assert(bus);
1249         assert(message);
1250         assert(m);
1251
1252         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1253         if (r < 0)
1254                 return r;
1255
1256         if (!path_startswith(sysfs, "/sys"))
1257                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1258
1259         if (!seat_name_is_valid(seat))
1260                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1261
1262         r = bus_verify_polkit_async(
1263                         message,
1264                         CAP_SYS_ADMIN,
1265                         "org.freedesktop.login1.attach-device",
1266                         interactive,
1267                         UID_INVALID,
1268                         &m->polkit_registry,
1269                         error);
1270         if (r < 0)
1271                 return r;
1272         if (r == 0)
1273                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1274
1275         r = attach_device(m, seat, sysfs);
1276         if (r < 0)
1277                 return r;
1278
1279         return sd_bus_reply_method_return(message, NULL);
1280 }
1281
1282 static int method_flush_devices(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1283         Manager *m = userdata;
1284         int interactive, r;
1285
1286         assert(bus);
1287         assert(message);
1288         assert(m);
1289
1290         r = sd_bus_message_read(message, "b", &interactive);
1291         if (r < 0)
1292                 return r;
1293
1294         r = bus_verify_polkit_async(
1295                         message,
1296                         CAP_SYS_ADMIN,
1297                         "org.freedesktop.login1.flush-devices",
1298                         interactive,
1299                         UID_INVALID,
1300                         &m->polkit_registry,
1301                         error);
1302         if (r < 0)
1303                 return r;
1304         if (r == 0)
1305                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1306
1307         r = flush_devices(m);
1308         if (r < 0)
1309                 return r;
1310
1311         return sd_bus_reply_method_return(message, NULL);
1312 }
1313
1314 static int have_multiple_sessions(
1315                 Manager *m,
1316                 uid_t uid) {
1317
1318         Session *session;
1319         Iterator i;
1320
1321         assert(m);
1322
1323         /* Check for other users' sessions. Greeter sessions do not
1324          * count, and non-login sessions do not count either. */
1325         HASHMAP_FOREACH(session, m->sessions, i)
1326                 if (session->class == SESSION_USER &&
1327                     session->user->uid != uid)
1328                         return true;
1329
1330         return false;
1331 }
1332
1333 static int bus_manager_log_shutdown(
1334                 Manager *m,
1335                 InhibitWhat w,
1336                 HandleAction action) {
1337
1338         const char *p, *q;
1339
1340         assert(m);
1341
1342         if (w != INHIBIT_SHUTDOWN)
1343                 return 0;
1344
1345         switch (action) {
1346         case HANDLE_POWEROFF:
1347                 p = "MESSAGE=System is powering down.";
1348                 q = "SHUTDOWN=power-off";
1349                 break;
1350         case HANDLE_HALT:
1351                 p = "MESSAGE=System is halting.";
1352                 q = "SHUTDOWN=halt";
1353                 break;
1354         case HANDLE_REBOOT:
1355                 p = "MESSAGE=System is rebooting.";
1356                 q = "SHUTDOWN=reboot";
1357                 break;
1358         case HANDLE_KEXEC:
1359                 p = "MESSAGE=System is rebooting with kexec.";
1360                 q = "SHUTDOWN=kexec";
1361                 break;
1362         default:
1363                 p = "MESSAGE=System is shutting down.";
1364                 q = NULL;
1365                 break;
1366         }
1367
1368         return log_struct(LOG_NOTICE,
1369                           LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
1370                           p,
1371                           q,
1372                           NULL);
1373 }
1374
1375 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1376         Manager *m = userdata;
1377
1378         assert(e);
1379         assert(m);
1380
1381         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1382         return 0;
1383 }
1384
1385 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1386         int r;
1387
1388         assert(m);
1389
1390         if (until <= now(CLOCK_MONOTONIC))
1391                 return 0;
1392
1393         /* We want to ignore the lid switch for a while after each
1394          * suspend, and after boot-up. Hence let's install a timer for
1395          * this. As long as the event source exists we ignore the lid
1396          * switch. */
1397
1398         if (m->lid_switch_ignore_event_source) {
1399                 usec_t u;
1400
1401                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1402                 if (r < 0)
1403                         return r;
1404
1405                 if (until <= u)
1406                         return 0;
1407
1408                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1409         } else
1410                 r = sd_event_add_time(
1411                                 m->event,
1412                                 &m->lid_switch_ignore_event_source,
1413                                 CLOCK_MONOTONIC,
1414                                 until, 0,
1415                                 lid_switch_ignore_handler, m);
1416
1417         return r;
1418 }
1419
1420 static int execute_shutdown_or_sleep(
1421                 Manager *m,
1422                 InhibitWhat w,
1423                 HandleAction action,
1424                 sd_bus_error *error) {
1425         int r;
1426
1427         assert(m);
1428         assert(w >= 0);
1429         assert(w < _INHIBIT_WHAT_MAX);
1430
1431         bus_manager_log_shutdown(m, w, action);
1432
1433         r = shutdown_or_sleep(m, action);
1434         if (r < 0)
1435                 return r;
1436
1437         /* Make sure the lid switch is ignored for a while (?) */
1438         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1439
1440         return 0;
1441 }
1442
1443 static int delay_shutdown_or_sleep(
1444                 Manager *m,
1445                 InhibitWhat w,
1446                 HandleAction action) {
1447
1448         assert(m);
1449         assert(w >= 0);
1450         assert(w < _INHIBIT_WHAT_MAX);
1451
1452         m->action_timestamp = now(CLOCK_MONOTONIC);
1453         m->pending_action = action;
1454         m->action_what = w;
1455
1456         return 0;
1457 }
1458
1459 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1460
1461         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1462                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1463                 [INHIBIT_SLEEP] = "PrepareForSleep"
1464         };
1465
1466         int active = _active;
1467
1468         assert(m);
1469         assert(w >= 0);
1470         assert(w < _INHIBIT_WHAT_MAX);
1471         assert(signal_name[w]);
1472
1473         return sd_bus_emit_signal(m->bus,
1474                                   "/org/freedesktop/login1",
1475                                   "org.freedesktop.login1.Manager",
1476                                   signal_name[w],
1477                                   "b",
1478                                   active);
1479 }
1480
1481 int bus_manager_shutdown_or_sleep_now_or_later(
1482                 Manager *m,
1483                 HandleAction action,
1484                 InhibitWhat w,
1485                 sd_bus_error *error) {
1486
1487         bool delayed;
1488         int r;
1489
1490         assert(m);
1491         assert(w >= 0);
1492         assert(w <= _INHIBIT_WHAT_MAX);
1493
1494         /* Tell everybody to prepare for shutdown/sleep */
1495         send_prepare_for(m, w, true);
1496
1497         delayed =
1498                 m->inhibit_delay_max > 0 &&
1499                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1500
1501         if (delayed)
1502                 /* Shutdown is delayed, keep in mind what we
1503                  * want to do, and start a timeout */
1504                 r = delay_shutdown_or_sleep(m, w, action);
1505         else
1506                 /* Shutdown is not delayed, execute it
1507                  * immediately */
1508                 r = execute_shutdown_or_sleep(m, w, action, error);
1509
1510         return r;
1511 }
1512
1513 static int method_do_shutdown_or_sleep(
1514                 Manager *m,
1515                 sd_bus_message *message,
1516                 HandleAction sleep_action,
1517                 InhibitWhat w,
1518                 const char *action,
1519                 const char *action_multiple_sessions,
1520                 const char *action_ignore_inhibit,
1521                 const char *sleep_verb,
1522                 sd_bus_message_handler_t method,
1523                 sd_bus_error *error) {
1524
1525         _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
1526         bool multiple_sessions, blocked;
1527         int interactive, r;
1528         uid_t uid;
1529
1530         assert(m);
1531         assert(message);
1532         assert(w >= 0);
1533         assert(w <= _INHIBIT_WHAT_MAX);
1534         assert(action);
1535         assert(action_multiple_sessions);
1536         assert(action_ignore_inhibit);
1537         assert(method);
1538
1539         r = sd_bus_message_read(message, "b", &interactive);
1540         if (r < 0)
1541                 return r;
1542
1543         /* Don't allow multiple jobs being executed at the same time */
1544         if (m->action_what)
1545                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1546
1547         if (sleep_verb) {
1548                 r = can_sleep(sleep_verb);
1549                 if (r < 0)
1550                         return r;
1551
1552                 if (r == 0)
1553                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1554         }
1555
1556         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1557         if (r < 0)
1558                 return r;
1559
1560         r = sd_bus_creds_get_euid(creds, &uid);
1561         if (r < 0)
1562                 return r;
1563
1564         r = have_multiple_sessions(m, uid);
1565         if (r < 0)
1566                 return r;
1567
1568         multiple_sessions = r > 0;
1569         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1570
1571         if (multiple_sessions) {
1572                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, interactive, UID_INVALID, &m->polkit_registry, error);
1573                 if (r < 0)
1574                         return r;
1575                 if (r == 0)
1576                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1577         }
1578
1579         if (blocked) {
1580                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, interactive, UID_INVALID, &m->polkit_registry, error);
1581                 if (r < 0)
1582                         return r;
1583                 if (r == 0)
1584                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1585         }
1586
1587         if (!multiple_sessions && !blocked) {
1588                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, interactive, UID_INVALID, &m->polkit_registry, error);
1589                 if (r < 0)
1590                         return r;
1591                 if (r == 0)
1592                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1593         }
1594
1595         r = bus_manager_shutdown_or_sleep_now_or_later(m, sleep_action, w, error);
1596         if (r < 0)
1597                 return r;
1598
1599         return sd_bus_reply_method_return(message, NULL);
1600 }
1601
1602 static int method_poweroff(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1603         Manager *m = userdata;
1604
1605         return method_do_shutdown_or_sleep(
1606                         m, message,
1607                         HANDLE_POWEROFF,
1608                         INHIBIT_SHUTDOWN,
1609                         "org.freedesktop.login1.power-off",
1610                         "org.freedesktop.login1.power-off-multiple-sessions",
1611                         "org.freedesktop.login1.power-off-ignore-inhibit",
1612                         NULL,
1613                         method_poweroff,
1614                         error);
1615 }
1616
1617 static int method_reboot(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1618         Manager *m = userdata;
1619
1620         return method_do_shutdown_or_sleep(
1621                         m, message,
1622                         HANDLE_REBOOT,
1623                         INHIBIT_SHUTDOWN,
1624                         "org.freedesktop.login1.reboot",
1625                         "org.freedesktop.login1.reboot-multiple-sessions",
1626                         "org.freedesktop.login1.reboot-ignore-inhibit",
1627                         NULL,
1628                         method_reboot,
1629                         error);
1630 }
1631
1632 static int method_suspend(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1633         Manager *m = userdata;
1634
1635         return method_do_shutdown_or_sleep(
1636                         m, message,
1637                         HANDLE_SUSPEND,
1638                         INHIBIT_SLEEP,
1639                         "org.freedesktop.login1.suspend",
1640                         "org.freedesktop.login1.suspend-multiple-sessions",
1641                         "org.freedesktop.login1.suspend-ignore-inhibit",
1642                         "suspend",
1643                         method_suspend,
1644                         error);
1645 }
1646
1647 static int method_hibernate(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1648         Manager *m = userdata;
1649
1650         return method_do_shutdown_or_sleep(
1651                         m, message,
1652                         HANDLE_HIBERNATE,
1653                         INHIBIT_SLEEP,
1654                         "org.freedesktop.login1.hibernate",
1655                         "org.freedesktop.login1.hibernate-multiple-sessions",
1656                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1657                         "hibernate",
1658                         method_hibernate,
1659                         error);
1660 }
1661
1662 static int method_hybrid_sleep(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1663         Manager *m = userdata;
1664
1665         return method_do_shutdown_or_sleep(
1666                         m, message,
1667                         HANDLE_HYBRID_SLEEP,
1668                         INHIBIT_SLEEP,
1669                         "org.freedesktop.login1.hibernate",
1670                         "org.freedesktop.login1.hibernate-multiple-sessions",
1671                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1672                         "hybrid-sleep",
1673                         method_hybrid_sleep,
1674                         error);
1675 }
1676
1677 static int method_can_shutdown_or_sleep(
1678                 Manager *m,
1679                 sd_bus_message *message,
1680                 InhibitWhat w,
1681                 const char *action,
1682                 const char *action_multiple_sessions,
1683                 const char *action_ignore_inhibit,
1684                 const char *sleep_verb,
1685                 sd_bus_error *error) {
1686
1687         _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
1688         bool multiple_sessions, challenge, blocked;
1689         const char *result = NULL;
1690         uid_t uid;
1691         int r;
1692
1693         assert(m);
1694         assert(message);
1695         assert(w >= 0);
1696         assert(w <= _INHIBIT_WHAT_MAX);
1697         assert(action);
1698         assert(action_multiple_sessions);
1699         assert(action_ignore_inhibit);
1700
1701         if (sleep_verb) {
1702                 r = can_sleep(sleep_verb);
1703                 if (r < 0)
1704                         return r;
1705                 if (r == 0)
1706                         return sd_bus_reply_method_return(message, "s", "na");
1707         }
1708
1709         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1710         if (r < 0)
1711                 return r;
1712
1713         r = sd_bus_creds_get_euid(creds, &uid);
1714         if (r < 0)
1715                 return r;
1716
1717         r = have_multiple_sessions(m, uid);
1718         if (r < 0)
1719                 return r;
1720
1721         multiple_sessions = r > 0;
1722         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1723
1724         if (multiple_sessions) {
1725                 r = bus_verify_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, false, UID_INVALID, &challenge, error);
1726                 if (r < 0)
1727                         return r;
1728
1729                 if (r > 0)
1730                         result = "yes";
1731                 else if (challenge)
1732                         result = "challenge";
1733                 else
1734                         result = "no";
1735         }
1736
1737         if (blocked) {
1738                 r = bus_verify_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, false, UID_INVALID, &challenge, error);
1739                 if (r < 0)
1740                         return r;
1741
1742                 if (r > 0 && !result)
1743                         result = "yes";
1744                 else if (challenge && (!result || streq(result, "yes")))
1745                         result = "challenge";
1746                 else
1747                         result = "no";
1748         }
1749
1750         if (!multiple_sessions && !blocked) {
1751                 /* If neither inhibit nor multiple sessions
1752                  * apply then just check the normal policy */
1753
1754                 r = bus_verify_polkit(message, CAP_SYS_BOOT, action, false, UID_INVALID, &challenge, error);
1755                 if (r < 0)
1756                         return r;
1757
1758                 if (r > 0)
1759                         result = "yes";
1760                 else if (challenge)
1761                         result = "challenge";
1762                 else
1763                         result = "no";
1764         }
1765
1766         return sd_bus_reply_method_return(message, "s", result);
1767 }
1768
1769 static int method_can_poweroff(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1770         Manager *m = userdata;
1771
1772         return method_can_shutdown_or_sleep(
1773                         m, message,
1774                         INHIBIT_SHUTDOWN,
1775                         "org.freedesktop.login1.power-off",
1776                         "org.freedesktop.login1.power-off-multiple-sessions",
1777                         "org.freedesktop.login1.power-off-ignore-inhibit",
1778                         NULL,
1779                         error);
1780 }
1781
1782 static int method_can_reboot(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1783         Manager *m = userdata;
1784
1785         return method_can_shutdown_or_sleep(
1786                         m, message,
1787                         INHIBIT_SHUTDOWN,
1788                         "org.freedesktop.login1.reboot",
1789                         "org.freedesktop.login1.reboot-multiple-sessions",
1790                         "org.freedesktop.login1.reboot-ignore-inhibit",
1791                         NULL,
1792                         error);
1793 }
1794
1795 static int method_can_suspend(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1796         Manager *m = userdata;
1797
1798         return method_can_shutdown_or_sleep(
1799                         m, message,
1800                         INHIBIT_SLEEP,
1801                         "org.freedesktop.login1.suspend",
1802                         "org.freedesktop.login1.suspend-multiple-sessions",
1803                         "org.freedesktop.login1.suspend-ignore-inhibit",
1804                         "suspend",
1805                         error);
1806 }
1807
1808 static int method_can_hibernate(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1809         Manager *m = userdata;
1810
1811         return method_can_shutdown_or_sleep(
1812                         m, message,
1813                         INHIBIT_SLEEP,
1814                         "org.freedesktop.login1.hibernate",
1815                         "org.freedesktop.login1.hibernate-multiple-sessions",
1816                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1817                         "hibernate",
1818                         error);
1819 }
1820
1821 static int method_can_hybrid_sleep(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1822         Manager *m = userdata;
1823
1824         return method_can_shutdown_or_sleep(
1825                         m, message,
1826                         INHIBIT_SLEEP,
1827                         "org.freedesktop.login1.hibernate",
1828                         "org.freedesktop.login1.hibernate-multiple-sessions",
1829                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1830                         "hybrid-sleep",
1831                         error);
1832 }
1833
1834 static int method_inhibit(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
1835         _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
1836         const char *who, *why, *what, *mode;
1837         _cleanup_free_ char *id = NULL;
1838         _cleanup_close_ int fifo_fd = -1;
1839         Manager *m = userdata;
1840         Inhibitor *i = NULL;
1841         InhibitMode mm;
1842         InhibitWhat w;
1843         pid_t pid;
1844         uid_t uid;
1845         int r;
1846
1847         assert(bus);
1848         assert(message);
1849         assert(m);
1850
1851         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
1852         if (r < 0)
1853                 return r;
1854
1855         w = inhibit_what_from_string(what);
1856         if (w <= 0)
1857                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
1858
1859         mm = inhibit_mode_from_string(mode);
1860         if (mm < 0)
1861                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
1862
1863         /* Delay is only supported for shutdown/sleep */
1864         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
1865                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
1866
1867         /* Don't allow taking delay locks while we are already
1868          * executing the operation. We shouldn't create the impression
1869          * that the lock was successful if the machine is about to go
1870          * down/suspend any moment. */
1871         if (m->action_what & w)
1872                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
1873
1874         r = bus_verify_polkit_async(
1875                         message,
1876                         CAP_SYS_BOOT,
1877                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
1878                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
1879                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
1880                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
1881                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
1882                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
1883                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
1884                         false,
1885                         UID_INVALID,
1886                         &m->polkit_registry,
1887                         error);
1888         if (r < 0)
1889                 return r;
1890         if (r == 0)
1891                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1892
1893         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
1894         if (r < 0)
1895                 return r;
1896
1897         r = sd_bus_creds_get_euid(creds, &uid);
1898         if (r < 0)
1899                 return r;
1900
1901         r = sd_bus_creds_get_pid(creds, &pid);
1902         if (r < 0)
1903                 return r;
1904
1905         do {
1906                 free(id);
1907                 id = NULL;
1908
1909                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
1910                         return -ENOMEM;
1911
1912         } while (hashmap_get(m->inhibitors, id));
1913
1914         r = manager_add_inhibitor(m, id, &i);
1915         if (r < 0)
1916                 return r;
1917
1918         i->what = w;
1919         i->mode = mm;
1920         i->pid = pid;
1921         i->uid = uid;
1922         i->why = strdup(why);
1923         i->who = strdup(who);
1924
1925         if (!i->why || !i->who) {
1926                 r = -ENOMEM;
1927                 goto fail;
1928         }
1929
1930         fifo_fd = inhibitor_create_fifo(i);
1931         if (fifo_fd < 0) {
1932                 r = fifo_fd;
1933                 goto fail;
1934         }
1935
1936         inhibitor_start(i);
1937
1938         return sd_bus_reply_method_return(message, "h", fifo_fd);
1939
1940 fail:
1941         if (i)
1942                 inhibitor_free(i);
1943
1944         return r;
1945 }
1946
1947 const sd_bus_vtable manager_vtable[] = {
1948         SD_BUS_VTABLE_START(0),
1949
1950         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
1951         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
1952         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
1953         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1954         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1955         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1956         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1957         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
1958         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
1959         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
1960         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
1961         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
1962         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
1963         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
1964         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
1965         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
1966         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
1967         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
1968         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
1969
1970         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
1971         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
1972         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
1973         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
1974         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
1975         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
1976         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
1977         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
1978         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
1979         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
1980         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
1981         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
1982         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
1983         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
1984         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
1985         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
1986         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
1987         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
1988         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
1989         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
1990         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
1991         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
1992         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
1993         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
1994         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
1995         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
1996         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
1997         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
1998         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
1999         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2000         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2001         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2002         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2003         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2004         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2005         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2006
2007         SD_BUS_SIGNAL("SessionNew", "so", 0),
2008         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2009         SD_BUS_SIGNAL("UserNew", "uo", 0),
2010         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2011         SD_BUS_SIGNAL("SeatNew", "so", 0),
2012         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2013         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2014         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2015
2016         SD_BUS_VTABLE_END
2017 };
2018
2019 int manager_send_changed(Manager *manager, const char *property, ...) {
2020         char **l;
2021
2022         assert(manager);
2023
2024         l = strv_from_stdarg_alloca(property);
2025
2026         return sd_bus_emit_properties_changed_strv(
2027                         manager->bus,
2028                         "/org/freedesktop/login1",
2029                         "org.freedesktop.login1.Manager",
2030                         l);
2031 }
2032
2033 int manager_dispatch_delayed(Manager *manager) {
2034         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2035         Inhibitor *offending = NULL;
2036         int r;
2037
2038         assert(manager);
2039
2040         if (manager->action_what == 0)
2041                 return 0;
2042
2043         /* Continue delay? */
2044         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
2045                 _cleanup_free_ char *comm = NULL, *u = NULL;
2046
2047                 get_process_comm(offending->pid, &comm);
2048                 u = uid_to_name(offending->uid);
2049
2050                 if (manager->action_timestamp + manager->inhibit_delay_max > now(CLOCK_MONOTONIC))
2051                         return 0;
2052
2053                 log_info("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
2054                          offending->uid, strna(u),
2055                          offending->pid, strna(comm));
2056         }
2057
2058         /* Actually do the operation */
2059         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->pending_action, &error);
2060         if (r < 0) {
2061                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
2062
2063                 manager->pending_action = HANDLE_IGNORE;
2064                 manager->action_what = 0;
2065                 return r;
2066         }
2067
2068         return 1;
2069 }