src/login/logind-dbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <pwd.h>
   5 #include <string.h>
   6 #include <sys/stat.h>
   7 #include <unistd.h>
   8
   9 #include "sd-device.h"
  10 #include "sd-messages.h"
  11
  12 #include "alloc-util.h"
  13 #include "audit-util.h"
  14 #include "bootspec.h"
  15 #include "bus-common-errors.h"
  16 #include "bus-error.h"
  17 #include "bus-unit-util.h"
  18 #include "bus-util.h"
  19 #include "cgroup-util.h"
  20 #include "device-util.h"
  21 #include "dirent-util.h"
  22 #include "efivars.h"
  23 #include "env-util.h"
  24 #include "escape.h"
  25 #include "fd-util.h"
  26 #include "fileio-label.h"
  27 #include "fileio.h"
  28 #include "format-util.h"
  29 #include "fs-util.h"
  30 #include "logind-dbus.h"
  31 #include "logind-seat-dbus.h"
  32 #include "logind-session-dbus.h"
  33 #include "logind-user-dbus.h"
  34 #include "logind.h"
  35 #include "missing_capability.h"
  36 #include "mkdir.h"
  37 #include "parse-util.h"
  38 #include "path-util.h"
  39 #include "process-util.h"
  40 #include "reboot-util.h"
  41 #include "selinux-util.h"
  42 #include "sleep-config.h"
  43 #include "special.h"
  44 #include "stdio-util.h"
  45 #include "strv.h"
  46 #include "terminal-util.h"
  47 #include "tmpfile-util.h"
  48 #include "unit-name.h"
  49 #include "user-util.h"
  50 #include "utmp-wtmp.h"
  51 #include "virt.h"
  52
  53 static int get_sender_session(
  54                 Manager *m,
  55                 sd_bus_message *message,
  56                 bool consult_display,
  57                 sd_bus_error *error,
  58                 Session **ret) {
  59
  60         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  61         Session *session = NULL;
  62         const char *name;
  63         int r;
  64
  65         /* Acquire the sender's session. This first checks if the sending process is inside a session itself,
  66          * and returns that. If not and 'consult_display' is true, this returns the display session of the
  67          * owning user of the caller. */
  68
  69         r = sd_bus_query_sender_creds(message,
  70                                       SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT|
  71                                       (consult_display ? SD_BUS_CREDS_OWNER_UID : 0), &creds);
  72         if (r < 0)
  73                 return r;
  74
  75         r = sd_bus_creds_get_session(creds, &name);
  76         if (r < 0) {
  77                 if (r != -ENXIO)
  78                         return r;
  79
  80                 if (consult_display) {
  81                         uid_t uid;
  82
  83                         r = sd_bus_creds_get_owner_uid(creds, &uid);
  84                         if (r < 0) {
  85                                 if (r != -ENXIO)
  86                                         return r;
  87                         } else {
  88                                 User *user;
  89
  90                                 user = hashmap_get(m->users, UID_TO_PTR(uid));
  91                                 if (user)
  92                                         session = user->display;
  93                         }
  94                 }
  95         } else
  96                 session = hashmap_get(m->sessions, name);
  97
  98         if (!session)
  99                 return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
 100                                          consult_display ?
 101                                          "Caller does not belong to any known session and doesn't own any suitable session." :
 102                                          "Caller does not belong to any known session.");
 103
 104         *ret = session;
 105         return 0;
 106 }
 107
 108 int manager_get_session_from_creds(
 109                 Manager *m,
 110                 sd_bus_message *message,
 111                 const char *name,
 112                 sd_bus_error *error,
 113                 Session **ret) {
 114
 115         Session *session;
 116
 117         assert(m);
 118         assert(ret);
 119
 120         if (SEAT_IS_SELF(name)) /* the caller's own session */
 121                 return get_sender_session(m, message, false, error, ret);
 122         if (SEAT_IS_AUTO(name)) /* The caller's own session if they have one, otherwise their user's display session */
 123                 return get_sender_session(m, message, true, error, ret);
 124
 125         session = hashmap_get(m->sessions, name);
 126         if (!session)
 127                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
 128
 129         *ret = session;
 130         return 0;
 131 }
 132
 133 static int get_sender_user(Manager *m, sd_bus_message *message, sd_bus_error *error, User **ret) {
 134         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 135         uid_t uid;
 136         User *user;
 137         int r;
 138
 139         /* Note that we get the owner UID of the session, not the actual client UID here! */
 140         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 141         if (r < 0)
 142                 return r;
 143
 144         r = sd_bus_creds_get_owner_uid(creds, &uid);
 145         if (r < 0) {
 146                 if (r != -ENXIO)
 147                         return r;
 148
 149                 user = NULL;
 150         } else
 151                 user = hashmap_get(m->users, UID_TO_PTR(uid));
 152
 153         if (!user)
 154                 return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 155                                          "Caller does not belong to any logged in or lingering user");
 156
 157         *ret = user;
 158         return 0;
 159 }
 160
 161 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
 162         User *user;
 163
 164         assert(m);
 165         assert(message);
 166         assert(ret);
 167
 168         if (!uid_is_valid(uid))
 169                 return get_sender_user(m, message, error, ret);
 170
 171         user = hashmap_get(m->users, UID_TO_PTR(uid));
 172         if (!user)
 173                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER,
 174                                          "User ID "UID_FMT" is not logged in or lingering", uid);
 175
 176         *ret = user;
 177         return 0;
 178 }
 179
 180 int manager_get_seat_from_creds(
 181                 Manager *m,
 182                 sd_bus_message *message,
 183                 const char *name,
 184                 sd_bus_error *error,
 185                 Seat **ret) {
 186
 187         Seat *seat;
 188         int r;
 189
 190         assert(m);
 191         assert(message);
 192         assert(ret);
 193
 194         if (SEAT_IS_SELF(name) || SEAT_IS_AUTO(name)) {
 195                 Session *session;
 196
 197                 /* Use these special seat names as session names */
 198                 r = manager_get_session_from_creds(m, message, name, error, &session);
 199                 if (r < 0)
 200                         return r;
 201
 202                 seat = session->seat;
 203                 if (!seat)
 204                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session '%s' has no seat.", session->id);
 205         } else {
 206                 seat = hashmap_get(m->seats, name);
 207                 if (!seat)
 208                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 209         }
 210
 211         *ret = seat;
 212         return 0;
 213 }
 214
 215 static int return_test_polkit(
 216                 sd_bus_message *message,
 217                 int capability,
 218                 const char *action,
 219                 const char **details,
 220                 uid_t good_user,
 221                 sd_bus_error *e) {
 222
 223         const char *result;
 224         bool challenge;
 225         int r;
 226
 227         r = bus_test_polkit(message, capability, action, details, good_user, &challenge, e);
 228         if (r < 0)
 229                 return r;
 230
 231         if (r > 0)
 232                 result = "yes";
 233         else if (challenge)
 234                 result = "challenge";
 235         else
 236                 result = "no";
 237
 238         return sd_bus_reply_method_return(message, "s", result);
 239 }
 240
 241 static int property_get_idle_hint(
 242                 sd_bus *bus,
 243                 const char *path,
 244                 const char *interface,
 245                 const char *property,
 246                 sd_bus_message *reply,
 247                 void *userdata,
 248                 sd_bus_error *error) {
 249
 250         Manager *m = userdata;
 251
 252         assert(bus);
 253         assert(reply);
 254         assert(m);
 255
 256         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 257 }
 258
 259 static int property_get_idle_since_hint(
 260                 sd_bus *bus,
 261                 const char *path,
 262                 const char *interface,
 263                 const char *property,
 264                 sd_bus_message *reply,
 265                 void *userdata,
 266                 sd_bus_error *error) {
 267
 268         Manager *m = userdata;
 269         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 270
 271         assert(bus);
 272         assert(reply);
 273         assert(m);
 274
 275         manager_get_idle_hint(m, &t);
 276
 277         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 278 }
 279
 280 static int property_get_inhibited(
 281                 sd_bus *bus,
 282                 const char *path,
 283                 const char *interface,
 284                 const char *property,
 285                 sd_bus_message *reply,
 286                 void *userdata,
 287                 sd_bus_error *error) {
 288
 289         Manager *m = userdata;
 290         InhibitWhat w;
 291
 292         assert(bus);
 293         assert(reply);
 294         assert(m);
 295
 296         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 297
 298         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 299 }
 300
 301 static int property_get_preparing(
 302                 sd_bus *bus,
 303                 const char *path,
 304                 const char *interface,
 305                 const char *property,
 306                 sd_bus_message *reply,
 307                 void *userdata,
 308                 sd_bus_error *error) {
 309
 310         Manager *m = userdata;
 311         bool b;
 312
 313         assert(bus);
 314         assert(reply);
 315         assert(m);
 316
 317         if (streq(property, "PreparingForShutdown"))
 318                 b = m->action_what & INHIBIT_SHUTDOWN;
 319         else
 320                 b = m->action_what & INHIBIT_SLEEP;
 321
 322         return sd_bus_message_append(reply, "b", b);
 323 }
 324
 325 static int property_get_scheduled_shutdown(
 326                 sd_bus *bus,
 327                 const char *path,
 328                 const char *interface,
 329                 const char *property,
 330                 sd_bus_message *reply,
 331                 void *userdata,
 332                 sd_bus_error *error) {
 333
 334         Manager *m = userdata;
 335         int r;
 336
 337         assert(bus);
 338         assert(reply);
 339         assert(m);
 340
 341         r = sd_bus_message_open_container(reply, 'r', "st");
 342         if (r < 0)
 343                 return r;
 344
 345         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 346         if (r < 0)
 347                 return r;
 348
 349         return sd_bus_message_close_container(reply);
 350 }
 351
 352 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 353 static BUS_DEFINE_PROPERTY_GET(property_get_docked, "b", Manager, manager_is_docked_or_external_displays);
 354 static BUS_DEFINE_PROPERTY_GET(property_get_lid_closed, "b", Manager, manager_is_lid_closed);
 355 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_on_external_power, "b", manager_is_on_external_power);
 356 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_compat_user_tasks_max, "t", CGROUP_LIMIT_MAX);
 357 static BUS_DEFINE_PROPERTY_GET_REF(property_get_hashmap_size, "t", Hashmap *, (uint64_t) hashmap_size);
 358
 359 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 360         _cleanup_free_ char *p = NULL;
 361         Manager *m = userdata;
 362         const char *name;
 363         Session *session;
 364         int r;
 365
 366         assert(message);
 367         assert(m);
 368
 369         r = sd_bus_message_read(message, "s", &name);
 370         if (r < 0)
 371                 return r;
 372
 373         r = manager_get_session_from_creds(m, message, name, error, &session);
 374         if (r < 0)
 375                 return r;
 376
 377         p = session_bus_path(session);
 378         if (!p)
 379                 return -ENOMEM;
 380
 381         return sd_bus_reply_method_return(message, "o", p);
 382 }
 383
 384 /* Get login session of a process.  This is not what you are looking for these days,
 385  * as apps may instead belong to a user service unit.  This includes terminal
 386  * emulators and hence command-line apps. */
 387 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 388         _cleanup_free_ char *p = NULL;
 389         Session *session = NULL;
 390         Manager *m = userdata;
 391         pid_t pid;
 392         int r;
 393
 394         assert(message);
 395         assert(m);
 396
 397         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 398
 399         r = sd_bus_message_read(message, "u", &pid);
 400         if (r < 0)
 401                 return r;
 402         if (pid < 0)
 403                 return -EINVAL;
 404
 405         if (pid == 0) {
 406                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 407                 if (r < 0)
 408                         return r;
 409         } else {
 410                 r = manager_get_session_by_pid(m, pid, &session);
 411                 if (r < 0)
 412                         return r;
 413
 414                 if (!session)
 415                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
 416                                                  "PID "PID_FMT" does not belong to any known session", pid);
 417         }
 418
 419         p = session_bus_path(session);
 420         if (!p)
 421                 return -ENOMEM;
 422
 423         return sd_bus_reply_method_return(message, "o", p);
 424 }
 425
 426 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 427         _cleanup_free_ char *p = NULL;
 428         Manager *m = userdata;
 429         uint32_t uid;
 430         User *user;
 431         int r;
 432
 433         assert(message);
 434         assert(m);
 435
 436         r = sd_bus_message_read(message, "u", &uid);
 437         if (r < 0)
 438                 return r;
 439
 440         r = manager_get_user_from_creds(m, message, uid, error, &user);
 441         if (r < 0)
 442                 return r;
 443
 444         p = user_bus_path(user);
 445         if (!p)
 446                 return -ENOMEM;
 447
 448         return sd_bus_reply_method_return(message, "o", p);
 449 }
 450
 451 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 452         _cleanup_free_ char *p = NULL;
 453         Manager *m = userdata;
 454         User *user = NULL;
 455         pid_t pid;
 456         int r;
 457
 458         assert(message);
 459         assert(m);
 460
 461         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 462
 463         r = sd_bus_message_read(message, "u", &pid);
 464         if (r < 0)
 465                 return r;
 466         if (pid < 0)
 467                 return -EINVAL;
 468
 469         if (pid == 0) {
 470                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 471                 if (r < 0)
 472                         return r;
 473         } else {
 474                 r = manager_get_user_by_pid(m, pid, &user);
 475                 if (r < 0)
 476                         return r;
 477                 if (!user)
 478                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 479                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 480                                                  pid);
 481         }
 482
 483         p = user_bus_path(user);
 484         if (!p)
 485                 return -ENOMEM;
 486
 487         return sd_bus_reply_method_return(message, "o", p);
 488 }
 489
 490 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 491         _cleanup_free_ char *p = NULL;
 492         Manager *m = userdata;
 493         const char *name;
 494         Seat *seat;
 495         int r;
 496
 497         assert(message);
 498         assert(m);
 499
 500         r = sd_bus_message_read(message, "s", &name);
 501         if (r < 0)
 502                 return r;
 503
 504         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 505         if (r < 0)
 506                 return r;
 507
 508         p = seat_bus_path(seat);
 509         if (!p)
 510                 return -ENOMEM;
 511
 512         return sd_bus_reply_method_return(message, "o", p);
 513 }
 514
 515 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 516         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 517         Manager *m = userdata;
 518         Session *session;
 519         Iterator i;
 520         int r;
 521
 522         assert(message);
 523         assert(m);
 524
 525         r = sd_bus_message_new_method_return(message, &reply);
 526         if (r < 0)
 527                 return r;
 528
 529         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 530         if (r < 0)
 531                 return r;
 532
 533         HASHMAP_FOREACH(session, m->sessions, i) {
 534                 _cleanup_free_ char *p = NULL;
 535
 536                 p = session_bus_path(session);
 537                 if (!p)
 538                         return -ENOMEM;
 539
 540                 r = sd_bus_message_append(reply, "(susso)",
 541                                           session->id,
 542                                           (uint32_t) session->user->uid,
 543                                           session->user->name,
 544                                           session->seat ? session->seat->id : "",
 545                                           p);
 546                 if (r < 0)
 547                         return r;
 548         }
 549
 550         r = sd_bus_message_close_container(reply);
 551         if (r < 0)
 552                 return r;
 553
 554         return sd_bus_send(NULL, reply, NULL);
 555 }
 556
 557 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 558         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 559         Manager *m = userdata;
 560         User *user;
 561         Iterator i;
 562         int r;
 563
 564         assert(message);
 565         assert(m);
 566
 567         r = sd_bus_message_new_method_return(message, &reply);
 568         if (r < 0)
 569                 return r;
 570
 571         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 572         if (r < 0)
 573                 return r;
 574
 575         HASHMAP_FOREACH(user, m->users, i) {
 576                 _cleanup_free_ char *p = NULL;
 577
 578                 p = user_bus_path(user);
 579                 if (!p)
 580                         return -ENOMEM;
 581
 582                 r = sd_bus_message_append(reply, "(uso)",
 583                                           (uint32_t) user->uid,
 584                                           user->name,
 585                                           p);
 586                 if (r < 0)
 587                         return r;
 588         }
 589
 590         r = sd_bus_message_close_container(reply);
 591         if (r < 0)
 592                 return r;
 593
 594         return sd_bus_send(NULL, reply, NULL);
 595 }
 596
 597 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 598         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 599         Manager *m = userdata;
 600         Seat *seat;
 601         Iterator i;
 602         int r;
 603
 604         assert(message);
 605         assert(m);
 606
 607         r = sd_bus_message_new_method_return(message, &reply);
 608         if (r < 0)
 609                 return r;
 610
 611         r = sd_bus_message_open_container(reply, 'a', "(so)");
 612         if (r < 0)
 613                 return r;
 614
 615         HASHMAP_FOREACH(seat, m->seats, i) {
 616                 _cleanup_free_ char *p = NULL;
 617
 618                 p = seat_bus_path(seat);
 619                 if (!p)
 620                         return -ENOMEM;
 621
 622                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 623                 if (r < 0)
 624                         return r;
 625         }
 626
 627         r = sd_bus_message_close_container(reply);
 628         if (r < 0)
 629                 return r;
 630
 631         return sd_bus_send(NULL, reply, NULL);
 632 }
 633
 634 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 635         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 636         Manager *m = userdata;
 637         Inhibitor *inhibitor;
 638         Iterator i;
 639         int r;
 640
 641         assert(message);
 642         assert(m);
 643
 644         r = sd_bus_message_new_method_return(message, &reply);
 645         if (r < 0)
 646                 return r;
 647
 648         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 649         if (r < 0)
 650                 return r;
 651
 652         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 653
 654                 r = sd_bus_message_append(reply, "(ssssuu)",
 655                                           strempty(inhibit_what_to_string(inhibitor->what)),
 656                                           strempty(inhibitor->who),
 657                                           strempty(inhibitor->why),
 658                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 659                                           (uint32_t) inhibitor->uid,
 660                                           (uint32_t) inhibitor->pid);
 661                 if (r < 0)
 662                         return r;
 663         }
 664
 665         r = sd_bus_message_close_container(reply);
 666         if (r < 0)
 667                 return r;
 668
 669         return sd_bus_send(NULL, reply, NULL);
 670 }
 671
 672 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 673         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 674         _cleanup_free_ char *id = NULL;
 675         Session *session = NULL;
 676         uint32_t audit_id = 0;
 677         Manager *m = userdata;
 678         User *user = NULL;
 679         Seat *seat = NULL;
 680         pid_t leader;
 681         uid_t uid;
 682         int remote;
 683         uint32_t vtnr = 0;
 684         SessionType t;
 685         SessionClass c;
 686         int r;
 687
 688         assert(message);
 689         assert(m);
 690
 691         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 692         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 693
 694         r = sd_bus_message_read(message, "uusssssussbss",
 695                                 &uid, &leader, &service, &type, &class, &desktop, &cseat,
 696                                 &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 697         if (r < 0)
 698                 return r;
 699
 700         if (!uid_is_valid(uid))
 701                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 702         if (leader < 0 || leader == 1 || leader == getpid_cached())
 703                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 704
 705         if (isempty(type))
 706                 t = _SESSION_TYPE_INVALID;
 707         else {
 708                 t = session_type_from_string(type);
 709                 if (t < 0)
 710                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 711                                                  "Invalid session type %s", type);
 712         }
 713
 714         if (isempty(class))
 715                 c = _SESSION_CLASS_INVALID;
 716         else {
 717                 c = session_class_from_string(class);
 718                 if (c < 0)
 719                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 720                                                  "Invalid session class %s", class);
 721         }
 722
 723         if (isempty(desktop))
 724                 desktop = NULL;
 725         else {
 726                 if (!string_is_safe(desktop))
 727                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 728                                                  "Invalid desktop string %s", desktop);
 729         }
 730
 731         if (isempty(cseat))
 732                 seat = NULL;
 733         else {
 734                 seat = hashmap_get(m->seats, cseat);
 735                 if (!seat)
 736                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT,
 737                                                  "No seat '%s' known", cseat);
 738         }
 739
 740         if (tty_is_vc(tty)) {
 741                 int v;
 742
 743                 if (!seat)
 744                         seat = m->seat0;
 745                 else if (seat != m->seat0)
 746                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 747                                                  "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 748
 749                 v = vtnr_from_tty(tty);
 750                 if (v <= 0)
 751                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 752                                                  "Cannot determine VT number from virtual console TTY %s", tty);
 753
 754                 if (vtnr == 0)
 755                         vtnr = (uint32_t) v;
 756                 else if (vtnr != (uint32_t) v)
 757                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 758                                                  "Specified TTY and VT number do not match");
 759
 760         } else if (tty_is_console(tty)) {
 761
 762                 if (!seat)
 763                         seat = m->seat0;
 764                 else if (seat != m->seat0)
 765                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 766                                                  "Console TTY specified but seat is not seat0");
 767
 768                 if (vtnr != 0)
 769                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 770                                                  "Console TTY specified but VT number is not 0");
 771         }
 772
 773         if (seat) {
 774                 if (seat_has_vts(seat)) {
 775                         if (vtnr <= 0 || vtnr > 63)
 776                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 777                                                          "VT number out of range");
 778                 } else {
 779                         if (vtnr != 0)
 780                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
 781                                                          "Seat has no VTs but VT number not 0");
 782                 }
 783         }
 784
 785         if (t == _SESSION_TYPE_INVALID) {
 786                 if (!isempty(display))
 787                         t = SESSION_X11;
 788                 else if (!isempty(tty))
 789                         t = SESSION_TTY;
 790                 else
 791                         t = SESSION_UNSPECIFIED;
 792         }
 793
 794         if (c == _SESSION_CLASS_INVALID) {
 795                 if (t == SESSION_UNSPECIFIED)
 796                         c = SESSION_BACKGROUND;
 797                 else
 798                         c = SESSION_USER;
 799         }
 800
 801         if (leader == 0) {
 802                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 803
 804                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 805                 if (r < 0)
 806                         return r;
 807
 808                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 809                 if (r < 0)
 810                         return r;
 811         }
 812
 813         /* Check if we are already in a logind session. Or if we are in user@.service
 814          * which is a special PAM session that avoids creating a logind session. */
 815         r = manager_get_user_by_pid(m, leader, NULL);
 816         if (r < 0)
 817                 return r;
 818         if (r > 0)
 819                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY,
 820                                          "Already running in a session or user slice");
 821
 822         /*
 823          * Old gdm and lightdm start the user-session on the same VT as
 824          * the greeter session. But they destroy the greeter session
 825          * after the user-session and want the user-session to take
 826          * over the VT. We need to support this for
 827          * backwards-compatibility, so make sure we allow new sessions
 828          * on a VT that a greeter is running on. Furthermore, to allow
 829          * re-logins, we have to allow a greeter to take over a used VT for
 830          * the exact same reasons.
 831          */
 832         if (c != SESSION_GREETER &&
 833             vtnr > 0 &&
 834             vtnr < m->seat0->position_count &&
 835             m->seat0->positions[vtnr] &&
 836             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 837                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 838
 839         if (hashmap_size(m->sessions) >= m->sessions_max)
 840                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
 841                                          "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.",
 842                                          m->sessions_max);
 843
 844         (void) audit_session_from_pid(leader, &audit_id);
 845         if (audit_session_is_valid(audit_id)) {
 846                 /* Keep our session IDs and the audit session IDs in sync */
 847
 848                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 849                         return -ENOMEM;
 850
 851                 /* Wut? There's already a session by this name and we didn't find it above? Weird, then let's
 852                  * not trust the audit data and let's better register a new ID */
 853                 if (hashmap_contains(m->sessions, id)) {
 854                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 855                         audit_id = AUDIT_SESSION_INVALID;
 856                         id = mfree(id);
 857                 }
 858         }
 859
 860         if (!id) {
 861                 do {
 862                         id = mfree(id);
 863
 864                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 865                                 return -ENOMEM;
 866
 867                 } while (hashmap_contains(m->sessions, id));
 868         }
 869
 870         /* The generated names should not clash with 'auto' or 'self' */
 871         assert(!SESSION_IS_SELF(id));
 872         assert(!SESSION_IS_AUTO(id));
 873
 874         /* If we are not watching utmp already, try again */
 875         manager_reconnect_utmp(m);
 876
 877         r = manager_add_user_by_uid(m, uid, &user);
 878         if (r < 0)
 879                 goto fail;
 880
 881         r = manager_add_session(m, id, &session);
 882         if (r < 0)
 883                 goto fail;
 884
 885         session_set_user(session, user);
 886         r = session_set_leader(session, leader);
 887         if (r < 0)
 888                 goto fail;
 889
 890         session->type = t;
 891         session->class = c;
 892         session->remote = remote;
 893         session->vtnr = vtnr;
 894
 895         if (!isempty(tty)) {
 896                 session->tty = strdup(tty);
 897                 if (!session->tty) {
 898                         r = -ENOMEM;
 899                         goto fail;
 900                 }
 901
 902                 session->tty_validity = TTY_FROM_PAM;
 903         }
 904
 905         if (!isempty(display)) {
 906                 session->display = strdup(display);
 907                 if (!session->display) {
 908                         r = -ENOMEM;
 909                         goto fail;
 910                 }
 911         }
 912
 913         if (!isempty(remote_user)) {
 914                 session->remote_user = strdup(remote_user);
 915                 if (!session->remote_user) {
 916                         r = -ENOMEM;
 917                         goto fail;
 918                 }
 919         }
 920
 921         if (!isempty(remote_host)) {
 922                 session->remote_host = strdup(remote_host);
 923                 if (!session->remote_host) {
 924                         r = -ENOMEM;
 925                         goto fail;
 926                 }
 927         }
 928
 929         if (!isempty(service)) {
 930                 session->service = strdup(service);
 931                 if (!session->service) {
 932                         r = -ENOMEM;
 933                         goto fail;
 934                 }
 935         }
 936
 937         if (!isempty(desktop)) {
 938                 session->desktop = strdup(desktop);
 939                 if (!session->desktop) {
 940                         r = -ENOMEM;
 941                         goto fail;
 942                 }
 943         }
 944
 945         if (seat) {
 946                 r = seat_attach_session(seat, session);
 947                 if (r < 0)
 948                         goto fail;
 949         }
 950
 951         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 952         if (r < 0)
 953                 goto fail;
 954
 955         r = session_start(session, message, error);
 956         if (r < 0)
 957                 goto fail;
 958
 959         r = sd_bus_message_exit_container(message);
 960         if (r < 0)
 961                 goto fail;
 962
 963         session->create_message = sd_bus_message_ref(message);
 964
 965         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 966          * session_send_create_reply(). */
 967
 968         return 1;
 969
 970 fail:
 971         if (session)
 972                 session_add_to_gc_queue(session);
 973
 974         if (user)
 975                 user_add_to_gc_queue(user);
 976
 977         return r;
 978 }
 979
 980 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 981         Manager *m = userdata;
 982         Session *session;
 983         const char *name;
 984         int r;
 985
 986         assert(message);
 987         assert(m);
 988
 989         r = sd_bus_message_read(message, "s", &name);
 990         if (r < 0)
 991                 return r;
 992
 993         r = manager_get_session_from_creds(m, message, name, error, &session);
 994         if (r < 0)
 995                 return r;
 996
 997         r = session_release(session);
 998         if (r < 0)
 999                 return r;
1000
1001         return sd_bus_reply_method_return(message, NULL);
1002 }
1003
1004 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1005         Manager *m = userdata;
1006         Session *session;
1007         const char *name;
1008         int r;
1009
1010         assert(message);
1011         assert(m);
1012
1013         r = sd_bus_message_read(message, "s", &name);
1014         if (r < 0)
1015                 return r;
1016
1017         r = manager_get_session_from_creds(m, message, name, error, &session);
1018         if (r < 0)
1019                 return r;
1020
1021         return bus_session_method_activate(message, session, error);
1022 }
1023
1024 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1025         const char *session_name, *seat_name;
1026         Manager *m = userdata;
1027         Session *session;
1028         Seat *seat;
1029         int r;
1030
1031         assert(message);
1032         assert(m);
1033
1034         /* Same as ActivateSession() but refuses to work if the seat doesn't match */
1035
1036         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
1037         if (r < 0)
1038                 return r;
1039
1040         r = manager_get_session_from_creds(m, message, session_name, error, &session);
1041         if (r < 0)
1042                 return r;
1043
1044         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
1045         if (r < 0)
1046                 return r;
1047
1048         if (session->seat != seat)
1049                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT,
1050                                          "Session %s not on seat %s", session_name, seat_name);
1051
1052         r = session_activate(session);
1053         if (r < 0)
1054                 return r;
1055
1056         return sd_bus_reply_method_return(message, NULL);
1057 }
1058
1059 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1060         Manager *m = userdata;
1061         Session *session;
1062         const char *name;
1063         int r;
1064
1065         assert(message);
1066         assert(m);
1067
1068         r = sd_bus_message_read(message, "s", &name);
1069         if (r < 0)
1070                 return r;
1071
1072         r = manager_get_session_from_creds(m, message, name, error, &session);
1073         if (r < 0)
1074                 return r;
1075
1076         return bus_session_method_lock(message, session, error);
1077 }
1078
1079 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1080         Manager *m = userdata;
1081         int r;
1082
1083         assert(message);
1084         assert(m);
1085
1086         r = bus_verify_polkit_async(
1087                         message,
1088                         CAP_SYS_ADMIN,
1089                         "org.freedesktop.login1.lock-sessions",
1090                         NULL,
1091                         false,
1092                         UID_INVALID,
1093                         &m->polkit_registry,
1094                         error);
1095         if (r < 0)
1096                 return r;
1097         if (r == 0)
1098                 return 1; /* Will call us back */
1099
1100         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1101         if (r < 0)
1102                 return r;
1103
1104         return sd_bus_reply_method_return(message, NULL);
1105 }
1106
1107 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1108         const char *name;
1109         Manager *m = userdata;
1110         Session *session;
1111         int r;
1112
1113         assert(message);
1114         assert(m);
1115
1116         r = sd_bus_message_read(message, "s", &name);
1117         if (r < 0)
1118                 return r;
1119
1120         r = manager_get_session_from_creds(m, message, name, error, &session);
1121         if (r < 0)
1122                 return r;
1123
1124         return bus_session_method_kill(message, session, error);
1125 }
1126
1127 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1128         Manager *m = userdata;
1129         uint32_t uid;
1130         User *user;
1131         int r;
1132
1133         assert(message);
1134         assert(m);
1135
1136         r = sd_bus_message_read(message, "u", &uid);
1137         if (r < 0)
1138                 return r;
1139
1140         r = manager_get_user_from_creds(m, message, uid, error, &user);
1141         if (r < 0)
1142                 return r;
1143
1144         return bus_user_method_kill(message, user, error);
1145 }
1146
1147 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1148         Manager *m = userdata;
1149         const char *name;
1150         Session *session;
1151         int r;
1152
1153         assert(message);
1154         assert(m);
1155
1156         r = sd_bus_message_read(message, "s", &name);
1157         if (r < 0)
1158                 return r;
1159
1160         r = manager_get_session_from_creds(m, message, name, error, &session);
1161         if (r < 0)
1162                 return r;
1163
1164         return bus_session_method_terminate(message, session, error);
1165 }
1166
1167 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1168         Manager *m = userdata;
1169         uint32_t uid;
1170         User *user;
1171         int r;
1172
1173         assert(message);
1174         assert(m);
1175
1176         r = sd_bus_message_read(message, "u", &uid);
1177         if (r < 0)
1178                 return r;
1179
1180         r = manager_get_user_from_creds(m, message, uid, error, &user);
1181         if (r < 0)
1182                 return r;
1183
1184         return bus_user_method_terminate(message, user, error);
1185 }
1186
1187 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1188         Manager *m = userdata;
1189         const char *name;
1190         Seat *seat;
1191         int r;
1192
1193         assert(message);
1194         assert(m);
1195
1196         r = sd_bus_message_read(message, "s", &name);
1197         if (r < 0)
1198                 return r;
1199
1200         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1201         if (r < 0)
1202                 return r;
1203
1204         return bus_seat_method_terminate(message, seat, error);
1205 }
1206
1207 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1208         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1209         _cleanup_free_ char *cc = NULL;
1210         Manager *m = userdata;
1211         int r, b, interactive;
1212         struct passwd *pw;
1213         const char *path;
1214         uint32_t uid, auth_uid;
1215
1216         assert(message);
1217         assert(m);
1218
1219         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1220         if (r < 0)
1221                 return r;
1222
1223         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1224                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1225         if (r < 0)
1226                 return r;
1227
1228         if (!uid_is_valid(uid)) {
1229                 /* Note that we get the owner UID of the session or user unit,
1230                  * not the actual client UID here! */
1231                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1232                 if (r < 0)
1233                         return r;
1234         }
1235
1236         /* owner_uid is racy, so for authorization we must use euid */
1237         r = sd_bus_creds_get_euid(creds, &auth_uid);
1238         if (r < 0)
1239                 return r;
1240
1241         errno = 0;
1242         pw = getpwuid(uid);
1243         if (!pw)
1244                 return errno_or_else(ENOENT);
1245
1246         r = bus_verify_polkit_async(
1247                         message,
1248                         CAP_SYS_ADMIN,
1249                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1250                                           "org.freedesktop.login1.set-user-linger",
1251                         NULL,
1252                         interactive,
1253                         UID_INVALID,
1254                         &m->polkit_registry,
1255                         error);
1256         if (r < 0)
1257                 return r;
1258         if (r == 0)
1259                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1260
1261         (void) mkdir_p_label("/var/lib/systemd", 0755);
1262         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1263         if (r < 0)
1264                 return r;
1265
1266         cc = cescape(pw->pw_name);
1267         if (!cc)
1268                 return -ENOMEM;
1269
1270         path = strjoina("/var/lib/systemd/linger/", cc);
1271         if (b) {
1272                 User *u;
1273
1274                 r = touch(path);
1275                 if (r < 0)
1276                         return r;
1277
1278                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1279                         user_start(u);
1280
1281         } else {
1282                 User *u;
1283
1284                 r = unlink(path);
1285                 if (r < 0 && errno != ENOENT)
1286                         return -errno;
1287
1288                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1289                 if (u)
1290                         user_add_to_gc_queue(u);
1291         }
1292
1293         return sd_bus_reply_method_return(message, NULL);
1294 }
1295
1296 static int trigger_device(Manager *m, sd_device *d) {
1297         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
1298         int r;
1299
1300         assert(m);
1301
1302         r = sd_device_enumerator_new(&e);
1303         if (r < 0)
1304                 return r;
1305
1306         r = sd_device_enumerator_allow_uninitialized(e);
1307         if (r < 0)
1308                 return r;
1309
1310         if (d) {
1311                 r = sd_device_enumerator_add_match_parent(e, d);
1312                 if (r < 0)
1313                         return r;
1314         }
1315
1316         FOREACH_DEVICE(e, d) {
1317                 _cleanup_free_ char *t = NULL;
1318                 const char *p;
1319
1320                 r = sd_device_get_syspath(d, &p);
1321                 if (r < 0)
1322                         return r;
1323
1324                 t = path_join(p, "uevent");
1325                 if (!t)
1326                         return -ENOMEM;
1327
1328                 (void) write_string_file(t, "change", WRITE_STRING_FILE_DISABLE_BUFFER);
1329         }
1330
1331         return 0;
1332 }
1333
1334 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1335         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
1336         _cleanup_free_ char *rule = NULL, *file = NULL;
1337         const char *id_for_seat;
1338         int r;
1339
1340         assert(m);
1341         assert(seat);
1342         assert(sysfs);
1343
1344         r = sd_device_new_from_syspath(&d, sysfs);
1345         if (r < 0)
1346                 return r;
1347
1348         if (sd_device_has_tag(d, "seat") <= 0)
1349                 return -ENODEV;
1350
1351         if (sd_device_get_property_value(d, "ID_FOR_SEAT", &id_for_seat) < 0)
1352                 return -ENODEV;
1353
1354         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1355                 return -ENOMEM;
1356
1357         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1358                 return -ENOMEM;
1359
1360         (void) mkdir_p_label("/etc/udev/rules.d", 0755);
1361         r = write_string_file_atomic_label(file, rule);
1362         if (r < 0)
1363                 return r;
1364
1365         return trigger_device(m, d);
1366 }
1367
1368 static int flush_devices(Manager *m) {
1369         _cleanup_closedir_ DIR *d;
1370
1371         assert(m);
1372
1373         d = opendir("/etc/udev/rules.d");
1374         if (!d) {
1375                 if (errno != ENOENT)
1376                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1377         } else {
1378                 struct dirent *de;
1379
1380                 FOREACH_DIRENT_ALL(de, d, break) {
1381                         if (!dirent_is_file(de))
1382                                 continue;
1383
1384                         if (!startswith(de->d_name, "72-seat-"))
1385                                 continue;
1386
1387                         if (!endswith(de->d_name, ".rules"))
1388                                 continue;
1389
1390                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1391                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1392                 }
1393         }
1394
1395         return trigger_device(m, NULL);
1396 }
1397
1398 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1399         const char *sysfs, *seat;
1400         Manager *m = userdata;
1401         int interactive, r;
1402
1403         assert(message);
1404         assert(m);
1405
1406         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1407         if (r < 0)
1408                 return r;
1409
1410         if (!path_is_normalized(sysfs))
1411                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not normalized", sysfs);
1412         if (!path_startswith(sysfs, "/sys"))
1413                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1414
1415         if (SEAT_IS_SELF(seat) || SEAT_IS_AUTO(seat)) {
1416                 Seat *found;
1417
1418                 r = manager_get_seat_from_creds(m, message, seat, error, &found);
1419                 if (r < 0)
1420                         return r;
1421
1422                 seat = found->id;
1423
1424         } else if (!seat_name_is_valid(seat)) /* Note that a seat does not have to exist yet for this operation to succeed */
1425                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat name %s is not valid", seat);
1426
1427         r = bus_verify_polkit_async(
1428                         message,
1429                         CAP_SYS_ADMIN,
1430                         "org.freedesktop.login1.attach-device",
1431                         NULL,
1432                         interactive,
1433                         UID_INVALID,
1434                         &m->polkit_registry,
1435                         error);
1436         if (r < 0)
1437                 return r;
1438         if (r == 0)
1439                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1440
1441         r = attach_device(m, seat, sysfs);
1442         if (r < 0)
1443                 return r;
1444
1445         return sd_bus_reply_method_return(message, NULL);
1446 }
1447
1448 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1449         Manager *m = userdata;
1450         int interactive, r;
1451
1452         assert(message);
1453         assert(m);
1454
1455         r = sd_bus_message_read(message, "b", &interactive);
1456         if (r < 0)
1457                 return r;
1458
1459         r = bus_verify_polkit_async(
1460                         message,
1461                         CAP_SYS_ADMIN,
1462                         "org.freedesktop.login1.flush-devices",
1463                         NULL,
1464                         interactive,
1465                         UID_INVALID,
1466                         &m->polkit_registry,
1467                         error);
1468         if (r < 0)
1469                 return r;
1470         if (r == 0)
1471                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1472
1473         r = flush_devices(m);
1474         if (r < 0)
1475                 return r;
1476
1477         return sd_bus_reply_method_return(message, NULL);
1478 }
1479
1480 static int have_multiple_sessions(
1481                 Manager *m,
1482                 uid_t uid) {
1483
1484         Session *session;
1485         Iterator i;
1486
1487         assert(m);
1488
1489         /* Check for other users' sessions. Greeter sessions do not
1490          * count, and non-login sessions do not count either. */
1491         HASHMAP_FOREACH(session, m->sessions, i)
1492                 if (session->class == SESSION_USER &&
1493                     session->user->uid != uid)
1494                         return true;
1495
1496         return false;
1497 }
1498
1499 static int bus_manager_log_shutdown(
1500                 Manager *m,
1501                 const char *unit_name) {
1502
1503         const char *p, *q;
1504
1505         assert(m);
1506         assert(unit_name);
1507
1508         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1509                 p = "MESSAGE=System is powering down";
1510                 q = "SHUTDOWN=power-off";
1511         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1512                 p = "MESSAGE=System is rebooting";
1513                 q = "SHUTDOWN=reboot";
1514         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1515                 p = "MESSAGE=System is halting";
1516                 q = "SHUTDOWN=halt";
1517         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1518                 p = "MESSAGE=System is rebooting with kexec";
1519                 q = "SHUTDOWN=kexec";
1520         } else {
1521                 p = "MESSAGE=System is shutting down";
1522                 q = NULL;
1523         }
1524
1525         if (isempty(m->wall_message))
1526                 p = strjoina(p, ".");
1527         else
1528                 p = strjoina(p, " (", m->wall_message, ").");
1529
1530         return log_struct(LOG_NOTICE,
1531                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1532                           p,
1533                           q);
1534 }
1535
1536 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1537         Manager *m = userdata;
1538
1539         assert(e);
1540         assert(m);
1541
1542         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1543         return 0;
1544 }
1545
1546 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1547         int r;
1548
1549         assert(m);
1550
1551         if (until <= now(CLOCK_MONOTONIC))
1552                 return 0;
1553
1554         /* We want to ignore the lid switch for a while after each
1555          * suspend, and after boot-up. Hence let's install a timer for
1556          * this. As long as the event source exists we ignore the lid
1557          * switch. */
1558
1559         if (m->lid_switch_ignore_event_source) {
1560                 usec_t u;
1561
1562                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1563                 if (r < 0)
1564                         return r;
1565
1566                 if (until <= u)
1567                         return 0;
1568
1569                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1570         } else
1571                 r = sd_event_add_time(
1572                                 m->event,
1573                                 &m->lid_switch_ignore_event_source,
1574                                 CLOCK_MONOTONIC,
1575                                 until, 0,
1576                                 lid_switch_ignore_handler, m);
1577
1578         return r;
1579 }
1580
1581 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1582         int active = _active;
1583
1584         assert(m);
1585         assert(IN_SET(w, INHIBIT_SHUTDOWN, INHIBIT_SLEEP));
1586
1587         return sd_bus_emit_signal(m->bus,
1588                                   "/org/freedesktop/login1",
1589                                   "org.freedesktop.login1.Manager",
1590                                   w == INHIBIT_SHUTDOWN ? "PrepareForShutdown" : "PrepareForSleep",
1591                                   "b",
1592                                   active);
1593 }
1594
1595 static int execute_shutdown_or_sleep(
1596                 Manager *m,
1597                 InhibitWhat w,
1598                 const char *unit_name,
1599                 sd_bus_error *error) {
1600
1601         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1602         const char *p;
1603         int r;
1604
1605         assert(m);
1606         assert(w > 0);
1607         assert(w < _INHIBIT_WHAT_MAX);
1608         assert(unit_name);
1609
1610         if (w == INHIBIT_SHUTDOWN)
1611                 bus_manager_log_shutdown(m, unit_name);
1612
1613         r = sd_bus_call_method(
1614                         m->bus,
1615                         "org.freedesktop.systemd1",
1616                         "/org/freedesktop/systemd1",
1617                         "org.freedesktop.systemd1.Manager",
1618                         "StartUnit",
1619                         error,
1620                         &reply,
1621                         "ss", unit_name, "replace-irreversibly");
1622         if (r < 0)
1623                 goto error;
1624
1625         r = sd_bus_message_read(reply, "o", &p);
1626         if (r < 0)
1627                 goto error;
1628
1629         r = free_and_strdup(&m->action_job, p);
1630         if (r < 0)
1631                 goto error;
1632
1633         m->action_unit = unit_name;
1634         m->action_what = w;
1635
1636         /* Make sure the lid switch is ignored for a while */
1637         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1638
1639         return 0;
1640
1641 error:
1642         /* Tell people that they now may take a lock again */
1643         (void) send_prepare_for(m, w, false);
1644
1645         return r;
1646 }
1647
1648 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1649
1650         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1651         Inhibitor *offending = NULL;
1652         int r;
1653
1654         assert(manager);
1655
1656         if (manager->action_what == 0 || manager->action_job)
1657                 return 0;
1658
1659         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1660                 _cleanup_free_ char *comm = NULL, *u = NULL;
1661
1662                 if (!timeout)
1663                         return 0;
1664
1665                 (void) get_process_comm(offending->pid, &comm);
1666                 u = uid_to_name(offending->uid);
1667
1668                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1669                            offending->uid, strna(u),
1670                            offending->pid, strna(comm));
1671         }
1672
1673         /* Actually do the operation */
1674         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1675         if (r < 0) {
1676                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1677                             bus_error_message(&error, r));
1678
1679                 manager->action_unit = NULL;
1680                 manager->action_what = 0;
1681                 return r;
1682         }
1683
1684         return 1;
1685 }
1686
1687 static int manager_inhibit_timeout_handler(
1688                         sd_event_source *s,
1689                         uint64_t usec,
1690                         void *userdata) {
1691
1692         Manager *manager = userdata;
1693         int r;
1694
1695         assert(manager);
1696         assert(manager->inhibit_timeout_source == s);
1697
1698         r = manager_dispatch_delayed(manager, true);
1699         return (r < 0) ? r : 0;
1700 }
1701
1702 static int delay_shutdown_or_sleep(
1703                 Manager *m,
1704                 InhibitWhat w,
1705                 const char *unit_name) {
1706
1707         int r;
1708         usec_t timeout_val;
1709
1710         assert(m);
1711         assert(w >= 0);
1712         assert(w < _INHIBIT_WHAT_MAX);
1713         assert(unit_name);
1714
1715         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1716
1717         if (m->inhibit_timeout_source) {
1718                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1719                 if (r < 0)
1720                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1721
1722                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1723                 if (r < 0)
1724                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1725         } else {
1726                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1727                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1728                 if (r < 0)
1729                         return r;
1730         }
1731
1732         m->action_unit = unit_name;
1733         m->action_what = w;
1734
1735         return 0;
1736 }
1737
1738 int bus_manager_shutdown_or_sleep_now_or_later(
1739                 Manager *m,
1740                 const char *unit_name,
1741                 InhibitWhat w,
1742                 sd_bus_error *error) {
1743
1744         _cleanup_free_ char *load_state = NULL;
1745         bool delayed;
1746         int r;
1747
1748         assert(m);
1749         assert(unit_name);
1750         assert(w > 0);
1751         assert(w < _INHIBIT_WHAT_MAX);
1752         assert(!m->action_job);
1753
1754         r = unit_load_state(m->bus, unit_name, &load_state);
1755         if (r < 0)
1756                 return r;
1757
1758         if (!streq(load_state, "loaded"))
1759                 return log_notice_errno(SYNTHETIC_ERRNO(EACCES),
1760                                         "Unit %s is %s, refusing operation.",
1761                                         unit_name, load_state);
1762
1763         /* Tell everybody to prepare for shutdown/sleep */
1764         (void) send_prepare_for(m, w, true);
1765
1766         delayed =
1767                 m->inhibit_delay_max > 0 &&
1768                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1769
1770         if (delayed)
1771                 /* Shutdown is delayed, keep in mind what we
1772                  * want to do, and start a timeout */
1773                 r = delay_shutdown_or_sleep(m, w, unit_name);
1774         else
1775                 /* Shutdown is not delayed, execute it
1776                  * immediately */
1777                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1778
1779         return r;
1780 }
1781
1782 static int verify_shutdown_creds(
1783                 Manager *m,
1784                 sd_bus_message *message,
1785                 InhibitWhat w,
1786                 bool interactive,
1787                 const char *action,
1788                 const char *action_multiple_sessions,
1789                 const char *action_ignore_inhibit,
1790                 sd_bus_error *error) {
1791
1792         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1793         bool multiple_sessions, blocked;
1794         uid_t uid;
1795         int r;
1796
1797         assert(m);
1798         assert(message);
1799         assert(w >= 0);
1800         assert(w <= _INHIBIT_WHAT_MAX);
1801
1802         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1803         if (r < 0)
1804                 return r;
1805
1806         r = sd_bus_creds_get_euid(creds, &uid);
1807         if (r < 0)
1808                 return r;
1809
1810         r = have_multiple_sessions(m, uid);
1811         if (r < 0)
1812                 return r;
1813
1814         multiple_sessions = r > 0;
1815         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1816
1817         if (multiple_sessions && action_multiple_sessions) {
1818                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1819                 if (r < 0)
1820                         return r;
1821                 if (r == 0)
1822                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1823         }
1824
1825         if (blocked && action_ignore_inhibit) {
1826                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1827                 if (r < 0)
1828                         return r;
1829                 if (r == 0)
1830                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1831         }
1832
1833         if (!multiple_sessions && !blocked && action) {
1834                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1835                 if (r < 0)
1836                         return r;
1837                 if (r == 0)
1838                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1839         }
1840
1841         return 0;
1842 }
1843
1844 static int method_do_shutdown_or_sleep(
1845                 Manager *m,
1846                 sd_bus_message *message,
1847                 const char *unit_name,
1848                 InhibitWhat w,
1849                 const char *action,
1850                 const char *action_multiple_sessions,
1851                 const char *action_ignore_inhibit,
1852                 const char *sleep_verb,
1853                 sd_bus_error *error) {
1854
1855         int interactive, r;
1856
1857         assert(m);
1858         assert(message);
1859         assert(unit_name);
1860         assert(w >= 0);
1861         assert(w <= _INHIBIT_WHAT_MAX);
1862
1863         r = sd_bus_message_read(message, "b", &interactive);
1864         if (r < 0)
1865                 return r;
1866
1867         /* Don't allow multiple jobs being executed at the same time */
1868         if (m->action_what > 0)
1869                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
1870                                          "There's already a shutdown or sleep operation in progress");
1871
1872         if (sleep_verb) {
1873                 r = can_sleep(sleep_verb);
1874                 if (r == -ENOSPC)
1875                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1876                                                 "Not enough swap space for hibernation");
1877                 if (r == 0)
1878                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1879                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1880                 if (r < 0)
1881                         return r;
1882         }
1883
1884         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1885                                   action_ignore_inhibit, error);
1886         if (r != 0)
1887                 return r;
1888
1889         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1890         if (r < 0)
1891                 return r;
1892
1893         return sd_bus_reply_method_return(message, NULL);
1894 }
1895
1896 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1897         Manager *m = userdata;
1898
1899         return method_do_shutdown_or_sleep(
1900                         m, message,
1901                         SPECIAL_POWEROFF_TARGET,
1902                         INHIBIT_SHUTDOWN,
1903                         "org.freedesktop.login1.power-off",
1904                         "org.freedesktop.login1.power-off-multiple-sessions",
1905                         "org.freedesktop.login1.power-off-ignore-inhibit",
1906                         NULL,
1907                         error);
1908 }
1909
1910 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1911         Manager *m = userdata;
1912
1913         return method_do_shutdown_or_sleep(
1914                         m, message,
1915                         SPECIAL_REBOOT_TARGET,
1916                         INHIBIT_SHUTDOWN,
1917                         "org.freedesktop.login1.reboot",
1918                         "org.freedesktop.login1.reboot-multiple-sessions",
1919                         "org.freedesktop.login1.reboot-ignore-inhibit",
1920                         NULL,
1921                         error);
1922 }
1923
1924 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1925         Manager *m = userdata;
1926
1927         return method_do_shutdown_or_sleep(
1928                         m, message,
1929                         SPECIAL_HALT_TARGET,
1930                         INHIBIT_SHUTDOWN,
1931                         "org.freedesktop.login1.halt",
1932                         "org.freedesktop.login1.halt-multiple-sessions",
1933                         "org.freedesktop.login1.halt-ignore-inhibit",
1934                         NULL,
1935                         error);
1936 }
1937
1938 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1939         Manager *m = userdata;
1940
1941         return method_do_shutdown_or_sleep(
1942                         m, message,
1943                         SPECIAL_SUSPEND_TARGET,
1944                         INHIBIT_SLEEP,
1945                         "org.freedesktop.login1.suspend",
1946                         "org.freedesktop.login1.suspend-multiple-sessions",
1947                         "org.freedesktop.login1.suspend-ignore-inhibit",
1948                         "suspend",
1949                         error);
1950 }
1951
1952 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1953         Manager *m = userdata;
1954
1955         return method_do_shutdown_or_sleep(
1956                         m, message,
1957                         SPECIAL_HIBERNATE_TARGET,
1958                         INHIBIT_SLEEP,
1959                         "org.freedesktop.login1.hibernate",
1960                         "org.freedesktop.login1.hibernate-multiple-sessions",
1961                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1962                         "hibernate",
1963                         error);
1964 }
1965
1966 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1967         Manager *m = userdata;
1968
1969         return method_do_shutdown_or_sleep(
1970                         m, message,
1971                         SPECIAL_HYBRID_SLEEP_TARGET,
1972                         INHIBIT_SLEEP,
1973                         "org.freedesktop.login1.hibernate",
1974                         "org.freedesktop.login1.hibernate-multiple-sessions",
1975                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1976                         "hybrid-sleep",
1977                         error);
1978 }
1979
1980 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1981         Manager *m = userdata;
1982
1983         return method_do_shutdown_or_sleep(
1984                         m, message,
1985                         SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
1986                         INHIBIT_SLEEP,
1987                         "org.freedesktop.login1.hibernate",
1988                         "org.freedesktop.login1.hibernate-multiple-sessions",
1989                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1990                         "hybrid-sleep",
1991                         error);
1992 }
1993
1994 static int nologin_timeout_handler(
1995                         sd_event_source *s,
1996                         uint64_t usec,
1997                         void *userdata) {
1998
1999         Manager *m = userdata;
2000
2001         log_info("Creating /run/nologin, blocking further logins...");
2002
2003         m->unlink_nologin =
2004                 create_shutdown_run_nologin_or_warn() >= 0;
2005
2006         return 0;
2007 }
2008
2009 static int update_schedule_file(Manager *m) {
2010         _cleanup_free_ char *temp_path = NULL;
2011         _cleanup_fclose_ FILE *f = NULL;
2012         int r;
2013
2014         assert(m);
2015
2016         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
2017         if (r < 0)
2018                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
2019
2020         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
2021         if (r < 0)
2022                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
2023
2024         (void) fchmod(fileno(f), 0644);
2025
2026         fprintf(f,
2027                 "USEC="USEC_FMT"\n"
2028                 "WARN_WALL=%i\n"
2029                 "MODE=%s\n",
2030                 m->scheduled_shutdown_timeout,
2031                 m->enable_wall_messages,
2032                 m->scheduled_shutdown_type);
2033
2034         if (!isempty(m->wall_message)) {
2035                 _cleanup_free_ char *t;
2036
2037                 t = cescape(m->wall_message);
2038                 if (!t) {
2039                         r = -ENOMEM;
2040                         goto fail;
2041                 }
2042
2043                 fprintf(f, "WALL_MESSAGE=%s\n", t);
2044         }
2045
2046         r = fflush_and_check(f);
2047         if (r < 0)
2048                 goto fail;
2049
2050         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
2051                 r = -errno;
2052                 goto fail;
2053         }
2054
2055         return 0;
2056
2057 fail:
2058         (void) unlink(temp_path);
2059         (void) unlink("/run/systemd/shutdown/scheduled");
2060
2061         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
2062 }
2063
2064 static void reset_scheduled_shutdown(Manager *m) {
2065         assert(m);
2066
2067         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2068         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
2069         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
2070
2071         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
2072         m->scheduled_shutdown_timeout = 0;
2073         m->shutdown_dry_run = false;
2074
2075         if (m->unlink_nologin) {
2076                 (void) unlink_or_warn("/run/nologin");
2077                 m->unlink_nologin = false;
2078         }
2079
2080         (void) unlink("/run/systemd/shutdown/scheduled");
2081 }
2082
2083 static int manager_scheduled_shutdown_handler(
2084                         sd_event_source *s,
2085                         uint64_t usec,
2086                         void *userdata) {
2087
2088         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2089         Manager *m = userdata;
2090         const char *target;
2091         int r;
2092
2093         assert(m);
2094
2095         if (isempty(m->scheduled_shutdown_type))
2096                 return 0;
2097
2098         if (streq(m->scheduled_shutdown_type, "poweroff"))
2099                 target = SPECIAL_POWEROFF_TARGET;
2100         else if (streq(m->scheduled_shutdown_type, "reboot"))
2101                 target = SPECIAL_REBOOT_TARGET;
2102         else if (streq(m->scheduled_shutdown_type, "halt"))
2103                 target = SPECIAL_HALT_TARGET;
2104         else
2105                 assert_not_reached("unexpected shutdown type");
2106
2107         /* Don't allow multiple jobs being executed at the same time */
2108         if (m->action_what > 0) {
2109                 r = -EALREADY;
2110                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2111                 goto error;
2112         }
2113
2114         if (m->shutdown_dry_run) {
2115                 /* We do not process delay inhibitors here.  Otherwise, we
2116                  * would have to be considered "in progress" (like the check
2117                  * above) for some seconds after our admin has seen the final
2118                  * wall message. */
2119
2120                 bus_manager_log_shutdown(m, target);
2121                 log_info("Running in dry run, suppressing action.");
2122                 reset_scheduled_shutdown(m);
2123
2124                 return 0;
2125         }
2126
2127         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2128         if (r < 0) {
2129                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2130                 goto error;
2131         }
2132
2133         return 0;
2134
2135 error:
2136         reset_scheduled_shutdown(m);
2137         return r;
2138 }
2139
2140 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2141         Manager *m = userdata;
2142         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2143         const char *action_multiple_sessions = NULL;
2144         const char *action_ignore_inhibit = NULL;
2145         const char *action = NULL;
2146         uint64_t elapse;
2147         char *type;
2148         int r;
2149         bool dry_run = false;
2150
2151         assert(m);
2152         assert(message);
2153
2154         r = sd_bus_message_read(message, "st", &type, &elapse);
2155         if (r < 0)
2156                 return r;
2157
2158         if (startswith(type, "dry-")) {
2159                 type += 4;
2160                 dry_run = true;
2161         }
2162
2163         if (streq(type, "poweroff")) {
2164                 action = "org.freedesktop.login1.power-off";
2165                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2166                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2167         } else if (streq(type, "reboot")) {
2168                 action = "org.freedesktop.login1.reboot";
2169                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2170                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2171         } else if (streq(type, "halt")) {
2172                 action = "org.freedesktop.login1.halt";
2173                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2174                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2175         } else
2176                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2177
2178         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2179                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2180         if (r != 0)
2181                 return r;
2182
2183         if (m->scheduled_shutdown_timeout_source) {
2184                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2185                 if (r < 0)
2186                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2187
2188                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2189                 if (r < 0)
2190                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2191         } else {
2192                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2193                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2194                 if (r < 0)
2195                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2196         }
2197
2198         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2199         if (r < 0) {
2200                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2201                 return log_oom();
2202         }
2203
2204         m->shutdown_dry_run = dry_run;
2205
2206         if (m->nologin_timeout_source) {
2207                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2208                 if (r < 0)
2209                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2210
2211                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2212                 if (r < 0)
2213                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2214         } else {
2215                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2216                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2217                 if (r < 0)
2218                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2219         }
2220
2221         m->scheduled_shutdown_timeout = elapse;
2222
2223         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2224         if (r >= 0) {
2225                 const char *tty = NULL;
2226
2227                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2228                 (void) sd_bus_creds_get_tty(creds, &tty);
2229
2230                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2231                 if (r < 0) {
2232                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2233                         return log_oom();
2234                 }
2235         }
2236
2237         r = manager_setup_wall_message_timer(m);
2238         if (r < 0)
2239                 return r;
2240
2241         r = update_schedule_file(m);
2242         if (r < 0)
2243                 return r;
2244
2245         return sd_bus_reply_method_return(message, NULL);
2246 }
2247
2248 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2249         Manager *m = userdata;
2250         bool cancelled;
2251
2252         assert(m);
2253         assert(message);
2254
2255         cancelled = m->scheduled_shutdown_type != NULL;
2256         reset_scheduled_shutdown(m);
2257
2258         if (cancelled && m->enable_wall_messages) {
2259                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2260                 _cleanup_free_ char *username = NULL;
2261                 const char *tty = NULL;
2262                 uid_t uid = 0;
2263                 int r;
2264
2265                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2266                 if (r >= 0) {
2267                         (void) sd_bus_creds_get_uid(creds, &uid);
2268                         (void) sd_bus_creds_get_tty(creds, &tty);
2269                 }
2270
2271                 username = uid_to_name(uid);
2272                 utmp_wall("The system shutdown has been cancelled",
2273                           username, tty, logind_wall_tty_filter, m);
2274         }
2275
2276         return sd_bus_reply_method_return(message, "b", cancelled);
2277 }
2278
2279 static int method_can_shutdown_or_sleep(
2280                 Manager *m,
2281                 sd_bus_message *message,
2282                 InhibitWhat w,
2283                 const char *action,
2284                 const char *action_multiple_sessions,
2285                 const char *action_ignore_inhibit,
2286                 const char *sleep_verb,
2287                 sd_bus_error *error) {
2288
2289         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2290         HandleAction handle;
2291         bool multiple_sessions, challenge, blocked;
2292         const char *result = NULL;
2293         uid_t uid;
2294         int r;
2295
2296         assert(m);
2297         assert(message);
2298         assert(w >= 0);
2299         assert(w <= _INHIBIT_WHAT_MAX);
2300         assert(action);
2301         assert(action_multiple_sessions);
2302         assert(action_ignore_inhibit);
2303
2304         if (sleep_verb) {
2305                 r = can_sleep(sleep_verb);
2306                 if (IN_SET(r,  0, -ENOSPC))
2307                         return sd_bus_reply_method_return(message, "s", "na");
2308                 if (r < 0)
2309                         return r;
2310         }
2311
2312         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2313         if (r < 0)
2314                 return r;
2315
2316         r = sd_bus_creds_get_euid(creds, &uid);
2317         if (r < 0)
2318                 return r;
2319
2320         r = have_multiple_sessions(m, uid);
2321         if (r < 0)
2322                 return r;
2323
2324         multiple_sessions = r > 0;
2325         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2326
2327         handle = handle_action_from_string(sleep_verb);
2328         if (handle >= 0) {
2329                 const char *target;
2330
2331                 target = manager_target_for_action(handle);
2332                 if (target) {
2333                         _cleanup_free_ char *load_state = NULL;
2334
2335                         r = unit_load_state(m->bus, target, &load_state);
2336                         if (r < 0)
2337                                 return r;
2338
2339                         if (!streq(load_state, "loaded")) {
2340                                 result = "no";
2341                                 goto finish;
2342                         }
2343                 }
2344         }
2345
2346         if (multiple_sessions) {
2347                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2348                 if (r < 0)
2349                         return r;
2350
2351                 if (r > 0)
2352                         result = "yes";
2353                 else if (challenge)
2354                         result = "challenge";
2355                 else
2356                         result = "no";
2357         }
2358
2359         if (blocked) {
2360                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2361                 if (r < 0)
2362                         return r;
2363
2364                 if (r > 0) {
2365                         if (!result)
2366                                 result = "yes";
2367                 } else if (challenge) {
2368                         if (!result || streq(result, "yes"))
2369                                 result = "challenge";
2370                 } else
2371                         result = "no";
2372         }
2373
2374         if (!multiple_sessions && !blocked) {
2375                 /* If neither inhibit nor multiple sessions
2376                  * apply then just check the normal policy */
2377
2378                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2379                 if (r < 0)
2380                         return r;
2381
2382                 if (r > 0)
2383                         result = "yes";
2384                 else if (challenge)
2385                         result = "challenge";
2386                 else
2387                         result = "no";
2388         }
2389
2390  finish:
2391         return sd_bus_reply_method_return(message, "s", result);
2392 }
2393
2394 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2395         Manager *m = userdata;
2396
2397         return method_can_shutdown_or_sleep(
2398                         m, message,
2399                         INHIBIT_SHUTDOWN,
2400                         "org.freedesktop.login1.power-off",
2401                         "org.freedesktop.login1.power-off-multiple-sessions",
2402                         "org.freedesktop.login1.power-off-ignore-inhibit",
2403                         NULL,
2404                         error);
2405 }
2406
2407 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2408         Manager *m = userdata;
2409
2410         return method_can_shutdown_or_sleep(
2411                         m, message,
2412                         INHIBIT_SHUTDOWN,
2413                         "org.freedesktop.login1.reboot",
2414                         "org.freedesktop.login1.reboot-multiple-sessions",
2415                         "org.freedesktop.login1.reboot-ignore-inhibit",
2416                         NULL,
2417                         error);
2418 }
2419
2420 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2421         Manager *m = userdata;
2422
2423         return method_can_shutdown_or_sleep(
2424                         m, message,
2425                         INHIBIT_SHUTDOWN,
2426                         "org.freedesktop.login1.halt",
2427                         "org.freedesktop.login1.halt-multiple-sessions",
2428                         "org.freedesktop.login1.halt-ignore-inhibit",
2429                         NULL,
2430                         error);
2431 }
2432
2433 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2434         Manager *m = userdata;
2435
2436         return method_can_shutdown_or_sleep(
2437                         m, message,
2438                         INHIBIT_SLEEP,
2439                         "org.freedesktop.login1.suspend",
2440                         "org.freedesktop.login1.suspend-multiple-sessions",
2441                         "org.freedesktop.login1.suspend-ignore-inhibit",
2442                         "suspend",
2443                         error);
2444 }
2445
2446 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2447         Manager *m = userdata;
2448
2449         return method_can_shutdown_or_sleep(
2450                         m, message,
2451                         INHIBIT_SLEEP,
2452                         "org.freedesktop.login1.hibernate",
2453                         "org.freedesktop.login1.hibernate-multiple-sessions",
2454                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2455                         "hibernate",
2456                         error);
2457 }
2458
2459 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2460         Manager *m = userdata;
2461
2462         return method_can_shutdown_or_sleep(
2463                         m, message,
2464                         INHIBIT_SLEEP,
2465                         "org.freedesktop.login1.hibernate",
2466                         "org.freedesktop.login1.hibernate-multiple-sessions",
2467                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2468                         "hybrid-sleep",
2469                         error);
2470 }
2471
2472 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2473         Manager *m = userdata;
2474
2475         return method_can_shutdown_or_sleep(
2476                         m, message,
2477                         INHIBIT_SLEEP,
2478                         "org.freedesktop.login1.hibernate",
2479                         "org.freedesktop.login1.hibernate-multiple-sessions",
2480                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2481                         "suspend-then-hibernate",
2482                         error);
2483 }
2484
2485 static int property_get_reboot_parameter(
2486                 sd_bus *bus,
2487                 const char *path,
2488                 const char *interface,
2489                 const char *property,
2490                 sd_bus_message *reply,
2491                 void *userdata,
2492                 sd_bus_error *error) {
2493         _cleanup_free_ char *parameter = NULL;
2494         int r;
2495
2496         assert(bus);
2497         assert(reply);
2498         assert(userdata);
2499
2500         r = read_reboot_parameter(&parameter);
2501         if (r < 0)
2502                 return r;
2503
2504         return sd_bus_message_append(reply, "s", parameter);
2505 }
2506
2507 static int method_set_reboot_parameter(
2508                 sd_bus_message *message,
2509                 void *userdata,
2510                 sd_bus_error *error) {
2511
2512         Manager *m = userdata;
2513         const char *arg;
2514         int r;
2515
2516         assert(message);
2517         assert(m);
2518
2519         r = sd_bus_message_read(message, "s", &arg);
2520         if (r < 0)
2521                 return r;
2522
2523         r = detect_container();
2524         if (r < 0)
2525                 return r;
2526         if (r > 0)
2527                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
2528                                          "Reboot parameter not supported in containers, refusing.");
2529
2530         r = bus_verify_polkit_async(message,
2531                                     CAP_SYS_ADMIN,
2532                                     "org.freedesktop.login1.set-reboot-parameter",
2533                                     NULL,
2534                                     false,
2535                                     UID_INVALID,
2536                                     &m->polkit_registry,
2537                                     error);
2538         if (r < 0)
2539                 return r;
2540         if (r == 0)
2541                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2542
2543         r = update_reboot_parameter_and_warn(arg, false);
2544         if (r < 0)
2545                 return r;
2546
2547         return sd_bus_reply_method_return(message, NULL);
2548 }
2549
2550 static int method_can_reboot_parameter(
2551                 sd_bus_message *message,
2552                 void *userdata,
2553                 sd_bus_error *error) {
2554
2555         Manager *m = userdata;
2556         int r;
2557
2558         assert(message);
2559         assert(m);
2560
2561         r = detect_container();
2562         if (r < 0)
2563                 return r;
2564         if (r > 0) /* Inside containers, specifying a reboot parameter, doesn't make much sense */
2565                 return sd_bus_reply_method_return(message, "s", "na");
2566
2567         return return_test_polkit(
2568                         message,
2569                         CAP_SYS_ADMIN,
2570                         "org.freedesktop.login1.set-reboot-parameter",
2571                         NULL,
2572                         UID_INVALID,
2573                         error);
2574 }
2575
2576 static int property_get_reboot_to_firmware_setup(
2577                 sd_bus *bus,
2578                 const char *path,
2579                 const char *interface,
2580                 const char *property,
2581                 sd_bus_message *reply,
2582                 void *userdata,
2583                 sd_bus_error *error) {
2584         int r;
2585
2586         assert(bus);
2587         assert(reply);
2588         assert(userdata);
2589
2590         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2591         if (r == -ENXIO) {
2592                 /* EFI case: let's see what is currently configured in the EFI variables */
2593                 r = efi_get_reboot_to_firmware();
2594                 if (r < 0 && r != -EOPNOTSUPP)
2595                         log_warning_errno(r, "Failed to determine reboot-to-firmware-setup state: %m");
2596         } else if (r < 0)
2597                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2598         else if (r > 0) {
2599                 /* Non-EFI case: let's see whether /run/systemd/reboot-to-firmware-setup exists. */
2600                 if (access("/run/systemd/reboot-to-firmware-setup", F_OK) < 0) {
2601                         if (errno != ENOENT)
2602                                 log_warning_errno(errno, "Failed to check whether /run/systemd/reboot-to-firmware-setup exists: %m");
2603
2604                         r = false;
2605                 } else
2606                         r = true;
2607         }
2608
2609         return sd_bus_message_append(reply, "b", r > 0);
2610 }
2611
2612 static int method_set_reboot_to_firmware_setup(
2613                 sd_bus_message *message,
2614                 void *userdata,
2615                 sd_bus_error *error) {
2616
2617         Manager *m = userdata;
2618         bool use_efi;
2619         int b, r;
2620
2621         assert(message);
2622         assert(m);
2623
2624         r = sd_bus_message_read(message, "b", &b);
2625         if (r < 0)
2626                 return r;
2627
2628         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2629         if (r == -ENXIO) {
2630                 /* EFI case: let's see what the firmware supports */
2631
2632                 r = efi_reboot_to_firmware_supported();
2633                 if (r == -EOPNOTSUPP)
2634                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2635                 if (r < 0)
2636                         return r;
2637
2638                 use_efi = true;
2639
2640         } else if (r <= 0) {
2641                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to off */
2642
2643                 if (r < 0)
2644                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2645
2646                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware.");
2647         } else
2648                 /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to on */
2649                 use_efi = false;
2650
2651         r = bus_verify_polkit_async(message,
2652                                     CAP_SYS_ADMIN,
2653                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2654                                     NULL,
2655                                     false,
2656                                     UID_INVALID,
2657                                     &m->polkit_registry,
2658                                     error);
2659         if (r < 0)
2660                 return r;
2661         if (r == 0)
2662                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2663
2664         if (use_efi) {
2665                 r = efi_set_reboot_to_firmware(b);
2666                 if (r < 0)
2667                         return r;
2668         } else {
2669                 if (b) {
2670                         r = touch("/run/systemd/reboot-to-firmware-setup");
2671                         if (r < 0)
2672                                 return r;
2673                 } else {
2674                         if (unlink("/run/systemd/reboot-to-firmware-setup") < 0 && errno != ENOENT)
2675                                 return -errno;
2676                 }
2677         }
2678
2679         return sd_bus_reply_method_return(message, NULL);
2680 }
2681
2682 static int method_can_reboot_to_firmware_setup(
2683                 sd_bus_message *message,
2684                 void *userdata,
2685                 sd_bus_error *error) {
2686
2687         Manager *m = userdata;
2688         int r;
2689
2690         assert(message);
2691         assert(m);
2692
2693         r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP");
2694         if (r == -ENXIO) {
2695                 /* EFI case: let's see what the firmware supports */
2696
2697                 r = efi_reboot_to_firmware_supported();
2698                 if (r < 0) {
2699                         if (r != -EOPNOTSUPP)
2700                                 log_warning_errno(r, "Failed to determine whether reboot to firmware is supported: %m");
2701
2702                         return sd_bus_reply_method_return(message, "s", "na");
2703                 }
2704
2705         } else if (r <= 0) {
2706                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP */
2707
2708                 if (r < 0)
2709                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m");
2710
2711                 return sd_bus_reply_method_return(message, "s", "na");
2712         }
2713
2714         return return_test_polkit(
2715                         message,
2716                         CAP_SYS_ADMIN,
2717                         "org.freedesktop.login1.set-reboot-to-firmware-setup",
2718                         NULL,
2719                         UID_INVALID,
2720                         error);
2721 }
2722
2723 static int property_get_reboot_to_boot_loader_menu(
2724                 sd_bus *bus,
2725                 const char *path,
2726                 const char *interface,
2727                 const char *property,
2728                 sd_bus_message *reply,
2729                 void *userdata,
2730                 sd_bus_error *error) {
2731
2732         uint64_t x = UINT64_MAX;
2733         int r;
2734
2735         assert(bus);
2736         assert(reply);
2737         assert(userdata);
2738
2739         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2740         if (r == -ENXIO) {
2741                 _cleanup_free_ char *v = NULL;
2742
2743                 /* EFI case: returns the current value of LoaderConfigTimeoutOneShot. Three cases are distuingished:
2744                  *
2745                  *     1. Variable not set, boot into boot loader menu is not enabled (we return UINT64_MAX to the user)
2746                  *     2. Variable set to "0", boot into boot loader menu is enabled with no timeout (we return 0 to the user)
2747                  *     3. Variable set to numeric value formatted in ASCII, boot into boot loader menu with the specified timeout in seconds
2748                  */
2749
2750                 r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderConfigTimeoutOneShot", &v);
2751                 if (r < 0) {
2752                         if (r != -ENOENT)
2753                                 log_warning_errno(r, "Failed to read LoaderConfigTimeoutOneShot variable: %m");
2754                 } else {
2755                         uint64_t sec;
2756
2757                         r = safe_atou64(v, &sec);
2758                         if (r < 0)
2759                                 log_warning_errno(r, "Failed to parse LoaderConfigTimeoutOneShot value '%s': %m", v);
2760                         else if (sec > (USEC_INFINITY / USEC_PER_SEC))
2761                                 log_warning("LoaderConfigTimeoutOneShot too large, ignoring: %m");
2762                         else
2763                                 x = sec * USEC_PER_SEC; /* return in µs */
2764                 }
2765
2766         } else if (r < 0)
2767                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2768         else if (r > 0) {
2769                 _cleanup_free_ char *v = NULL;
2770
2771                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-menu. */
2772
2773                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-menu", &v);
2774                 if (r < 0) {
2775                         if (r != -ENOENT)
2776                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-menu: %m");
2777                 } else {
2778                         r = safe_atou64(v, &x);
2779                         if (r < 0)
2780                                 log_warning_errno(r, "Failed to parse /run/systemd/reboot-to-boot-loader-menu: %m");
2781                 }
2782         }
2783
2784         return sd_bus_message_append(reply, "t", x);
2785 }
2786
2787 static int method_set_reboot_to_boot_loader_menu(
2788                 sd_bus_message *message,
2789                 void *userdata,
2790                 sd_bus_error *error) {
2791
2792         Manager *m = userdata;
2793         bool use_efi;
2794         uint64_t x;
2795         int r;
2796
2797         assert(message);
2798         assert(m);
2799
2800         r = sd_bus_message_read(message, "t", &x);
2801         if (r < 0)
2802                 return r;
2803
2804         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2805         if (r == -ENXIO) {
2806                 uint64_t features;
2807
2808                 /* EFI case: let's see if booting into boot loader menu is supported. */
2809
2810                 r = efi_loader_get_features(&features);
2811                 if (r < 0)
2812                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
2813                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
2814                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
2815
2816                 use_efi = true;
2817
2818         } else if (r <= 0) {
2819                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to off */
2820
2821                 if (r < 0)
2822                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2823
2824                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu.");
2825         } else
2826                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to on */
2827                 use_efi = false;
2828
2829         r = bus_verify_polkit_async(message,
2830                                     CAP_SYS_ADMIN,
2831                                     "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
2832                                     NULL,
2833                                     false,
2834                                     UID_INVALID,
2835                                     &m->polkit_registry,
2836                                     error);
2837         if (r < 0)
2838                 return r;
2839         if (r == 0)
2840                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2841
2842         if (use_efi) {
2843                 if (x == UINT64_MAX)
2844                         r = efi_set_variable(EFI_VENDOR_LOADER, "LoaderConfigTimeoutOneShot", NULL, 0);
2845                 else {
2846                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
2847                         xsprintf(buf, "%" PRIu64, DIV_ROUND_UP(x, USEC_PER_SEC)); /* second granularity */
2848
2849                         r = efi_set_variable_string(EFI_VENDOR_LOADER, "LoaderConfigTimeoutOneShot", buf);
2850                 }
2851                 if (r < 0)
2852                         return r;
2853         } else {
2854                 if (x == UINT64_MAX) {
2855                         if (unlink("/run/systemd/reboot-to-loader-menu") < 0 && errno != ENOENT)
2856                                 return -errno;
2857                 } else {
2858                         char buf[DECIMAL_STR_MAX(uint64_t) + 1];
2859
2860                         xsprintf(buf, "%" PRIu64, x); /* µs granularity */
2861
2862                         r = write_string_file_atomic_label("/run/systemd/reboot-to-loader-menu", buf);
2863                         if (r < 0)
2864                                 return r;
2865                 }
2866         }
2867
2868         return sd_bus_reply_method_return(message, NULL);
2869 }
2870
2871 static int method_can_reboot_to_boot_loader_menu(
2872                 sd_bus_message *message,
2873                 void *userdata,
2874                 sd_bus_error *error) {
2875
2876         Manager *m = userdata;
2877         int r;
2878
2879         assert(message);
2880         assert(m);
2881
2882         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU");
2883         if (r == -ENXIO) {
2884                 uint64_t features = 0;
2885
2886                 /* EFI case, let's see if booting into boot loader menu is supported. */
2887
2888                 r = efi_loader_get_features(&features);
2889                 if (r < 0)
2890                         log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m");
2891                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT))
2892                         return sd_bus_reply_method_return(message, "s", "na");
2893
2894         } else if (r <= 0) {
2895                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU */
2896
2897                 if (r < 0)
2898                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m");
2899
2900                 return sd_bus_reply_method_return(message, "s", "na");
2901         }
2902
2903         return return_test_polkit(
2904                         message,
2905                         CAP_SYS_ADMIN,
2906                         "org.freedesktop.login1.set-reboot-to-boot-loader-menu",
2907                         NULL,
2908                         UID_INVALID,
2909                         error);
2910 }
2911
2912 static int property_get_reboot_to_boot_loader_entry(
2913                 sd_bus *bus,
2914                 const char *path,
2915                 const char *interface,
2916                 const char *property,
2917                 sd_bus_message *reply,
2918                 void *userdata,
2919                 sd_bus_error *error) {
2920
2921         _cleanup_free_ char *v = NULL;
2922         int r;
2923
2924         assert(bus);
2925         assert(reply);
2926         assert(userdata);
2927
2928         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
2929         if (r == -ENXIO) {
2930                 /* EFI case: let's read the LoaderEntryOneShot variable */
2931
2932                 r = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderEntryOneShot", &v);
2933                 if (r < 0) {
2934                         if (r != -ENOENT)
2935                                 log_warning_errno(r, "Failed to read LoaderEntryOneShot variable: %m");
2936                 } else if (!efi_loader_entry_name_valid(v)) {
2937                         log_warning("LoaderEntryOneShot contains invalid entry name '%s', ignoring.", v);
2938                         v = mfree(v);
2939                 }
2940         } else if (r < 0)
2941                 log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
2942         else if (r > 0) {
2943
2944                 /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-entry. */
2945
2946                 r = read_one_line_file("/run/systemd/reboot-to-boot-loader-entry", &v);
2947                 if (r < 0) {
2948                         if (r != -ENOENT)
2949                                 log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-entry: %m");
2950                 } else if (!efi_loader_entry_name_valid(v)) {
2951                         log_warning("/run/systemd/reboot-to-boot-loader-entry is not valid, ignoring.");
2952                         v = mfree(v);
2953                 }
2954         }
2955
2956         return sd_bus_message_append(reply, "s", v);
2957 }
2958
2959 static int boot_loader_entry_exists(const char *id) {
2960         _cleanup_(boot_config_free) BootConfig config = {};
2961         int r;
2962
2963         assert(id);
2964
2965         r = boot_entries_load_config_auto(NULL, NULL, &config);
2966         if (r < 0 && r != -ENOKEY) /* don't complain if no GPT is found, hence skip ENOKEY */
2967                 return r;
2968
2969         (void) boot_entries_augment_from_loader(&config, true);
2970
2971         return boot_config_has_entry(&config, id);
2972 }
2973
2974 static int method_set_reboot_to_boot_loader_entry(
2975                 sd_bus_message *message,
2976                 void *userdata,
2977                 sd_bus_error *error) {
2978
2979         Manager *m = userdata;
2980         bool use_efi;
2981         const char *v;
2982         int r;
2983
2984         assert(message);
2985         assert(m);
2986
2987         r = sd_bus_message_read(message, "s", &v);
2988         if (r < 0)
2989                 return r;
2990
2991         if (isempty(v))
2992                 v = NULL;
2993         else if (efi_loader_entry_name_valid(v)) {
2994                 r = boot_loader_entry_exists(v);
2995                 if (r < 0)
2996                         return r;
2997                 if (r == 0)
2998                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader entry '%s' is not known.", v);
2999         } else
3000                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Boot loader entry name '%s' is not valid, refusing.", v);
3001
3002         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3003         if (r == -ENXIO) {
3004                 uint64_t features;
3005
3006                 /* EFI case: let's see if booting into boot loader entry is supported. */
3007
3008                 r = efi_loader_get_features(&features);
3009                 if (r < 0)
3010                         log_warning_errno(r, "Failed to determine whether reboot into boot loader entry is supported: %m");
3011                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3012                         return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
3013
3014                 use_efi = true;
3015
3016         } else if (r <= 0) {
3017                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to off */
3018
3019                 if (r < 0)
3020                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3021
3022                 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry.");
3023         } else
3024                 /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to on */
3025                 use_efi = false;
3026
3027         r = bus_verify_polkit_async(message,
3028                                     CAP_SYS_ADMIN,
3029                                     "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3030                                     NULL,
3031                                     false,
3032                                     UID_INVALID,
3033                                     &m->polkit_registry,
3034                                     error);
3035         if (r < 0)
3036                 return r;
3037         if (r == 0)
3038                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3039
3040         if (use_efi) {
3041                 if (isempty(v))
3042                         /* Delete item */
3043                         r = efi_set_variable(EFI_VENDOR_LOADER, "LoaderEntryOneShot", NULL, 0);
3044                 else
3045                         r = efi_set_variable_string(EFI_VENDOR_LOADER, "LoaderEntryOneShot", v);
3046                 if (r < 0)
3047                         return r;
3048         } else {
3049                 if (isempty(v)) {
3050                         if (unlink("/run/systemd/reboot-to-boot-loader-entry") < 0 && errno != ENOENT)
3051                                 return -errno;
3052                 } else {
3053                         r = write_string_file_atomic_label("/run/systemd/reboot-boot-to-loader-entry", v);
3054                         if (r < 0)
3055                                 return r;
3056                 }
3057         }
3058
3059         return sd_bus_reply_method_return(message, NULL);
3060 }
3061
3062 static int method_can_reboot_to_boot_loader_entry(
3063                 sd_bus_message *message,
3064                 void *userdata,
3065                 sd_bus_error *error) {
3066
3067         Manager *m = userdata;
3068         int r;
3069
3070         assert(message);
3071         assert(m);
3072
3073         r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY");
3074         if (r == -ENXIO) {
3075                 uint64_t features = 0;
3076
3077                 /* EFI case, let's see if booting into boot loader entry is supported. */
3078
3079                 r = efi_loader_get_features(&features);
3080                 if (r < 0)
3081                         log_warning_errno(r, "Failed to determine whether reboot to boot loader entry is supported: %m");
3082                 if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT))
3083                         return sd_bus_reply_method_return(message, "s", "na");
3084
3085         } else if (r <= 0) {
3086                 /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY */
3087
3088                 if (r < 0)
3089                         log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m");
3090
3091                 return sd_bus_reply_method_return(message, "s", "na");
3092         }
3093
3094         return return_test_polkit(
3095                         message,
3096                         CAP_SYS_ADMIN,
3097                         "org.freedesktop.login1.set-reboot-to-boot-loader-entry",
3098                         NULL,
3099                         UID_INVALID,
3100                         error);
3101 }
3102
3103 static int property_get_boot_loader_entries(
3104                 sd_bus *bus,
3105                 const char *path,
3106                 const char *interface,
3107                 const char *property,
3108                 sd_bus_message *reply,
3109                 void *userdata,
3110                 sd_bus_error *error) {
3111
3112         _cleanup_(boot_config_free) BootConfig config = {};
3113         size_t i;
3114         int r;
3115
3116         assert(bus);
3117         assert(reply);
3118         assert(userdata);
3119
3120         r = boot_entries_load_config_auto(NULL, NULL, &config);
3121         if (r < 0 && r != -ENOKEY) /* don't complain if there's no GPT found */
3122                 return r;
3123
3124         (void) boot_entries_augment_from_loader(&config, true);
3125
3126         r = sd_bus_message_open_container(reply, 'a', "s");
3127         if (r < 0)
3128                 return r;
3129
3130         for (i = 0; i < config.n_entries; i++) {
3131                 BootEntry *e = config.entries + i;
3132
3133                 r = sd_bus_message_append(reply, "s", e->id);
3134                 if (r < 0)
3135                         return r;
3136         }
3137
3138         return sd_bus_message_close_container(reply);
3139 }
3140
3141 static int method_set_wall_message(
3142                 sd_bus_message *message,
3143                 void *userdata,
3144                 sd_bus_error *error) {
3145
3146         int r;
3147         Manager *m = userdata;
3148         char *wall_message;
3149         unsigned enable_wall_messages;
3150
3151         assert(message);
3152         assert(m);
3153
3154         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
3155         if (r < 0)
3156                 return r;
3157
3158         r = bus_verify_polkit_async(message,
3159                                     CAP_SYS_ADMIN,
3160                                     "org.freedesktop.login1.set-wall-message",
3161                                     NULL,
3162                                     false,
3163                                     UID_INVALID,
3164                                     &m->polkit_registry,
3165                                     error);
3166         if (r < 0)
3167                 return r;
3168         if (r == 0)
3169                 return 1; /* Will call us back */
3170
3171         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
3172         if (r < 0)
3173                 return log_oom();
3174
3175         m->enable_wall_messages = enable_wall_messages;
3176
3177         return sd_bus_reply_method_return(message, NULL);
3178 }
3179
3180 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3181         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3182         const char *who, *why, *what, *mode;
3183         _cleanup_free_ char *id = NULL;
3184         _cleanup_close_ int fifo_fd = -1;
3185         Manager *m = userdata;
3186         Inhibitor *i = NULL;
3187         InhibitMode mm;
3188         InhibitWhat w;
3189         pid_t pid;
3190         uid_t uid;
3191         int r;
3192
3193         assert(message);
3194         assert(m);
3195
3196         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
3197         if (r < 0)
3198                 return r;
3199
3200         w = inhibit_what_from_string(what);
3201         if (w <= 0)
3202                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3203                                          "Invalid what specification %s", what);
3204
3205         mm = inhibit_mode_from_string(mode);
3206         if (mm < 0)
3207                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3208                                          "Invalid mode specification %s", mode);
3209
3210         /* Delay is only supported for shutdown/sleep */
3211         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
3212                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS,
3213                                          "Delay inhibitors only supported for shutdown and sleep");
3214
3215         /* Don't allow taking delay locks while we are already
3216          * executing the operation. We shouldn't create the impression
3217          * that the lock was successful if the machine is about to go
3218          * down/suspend any moment. */
3219         if (m->action_what & w)
3220                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS,
3221                                          "The operation inhibition has been requested for is already running");
3222
3223         r = bus_verify_polkit_async(
3224                         message,
3225                         CAP_SYS_BOOT,
3226                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
3227                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
3228                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
3229                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
3230                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
3231                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
3232                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
3233                         NULL,
3234                         false,
3235                         UID_INVALID,
3236                         &m->polkit_registry,
3237                         error);
3238         if (r < 0)
3239                 return r;
3240         if (r == 0)
3241                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
3242
3243         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
3244         if (r < 0)
3245                 return r;
3246
3247         r = sd_bus_creds_get_euid(creds, &uid);
3248         if (r < 0)
3249                 return r;
3250
3251         r = sd_bus_creds_get_pid(creds, &pid);
3252         if (r < 0)
3253                 return r;
3254
3255         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
3256                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED,
3257                                          "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.",
3258                                          m->inhibitors_max);
3259
3260         do {
3261                 id = mfree(id);
3262
3263                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
3264                         return -ENOMEM;
3265
3266         } while (hashmap_get(m->inhibitors, id));
3267
3268         r = manager_add_inhibitor(m, id, &i);
3269         if (r < 0)
3270                 return r;
3271
3272         i->what = w;
3273         i->mode = mm;
3274         i->pid = pid;
3275         i->uid = uid;
3276         i->why = strdup(why);
3277         i->who = strdup(who);
3278
3279         if (!i->why || !i->who) {
3280                 r = -ENOMEM;
3281                 goto fail;
3282         }
3283
3284         fifo_fd = inhibitor_create_fifo(i);
3285         if (fifo_fd < 0) {
3286                 r = fifo_fd;
3287                 goto fail;
3288         }
3289
3290         r = inhibitor_start(i);
3291         if (r < 0)
3292                 goto fail;
3293
3294         return sd_bus_reply_method_return(message, "h", fifo_fd);
3295
3296 fail:
3297         if (i)
3298                 inhibitor_free(i);
3299
3300         return r;
3301 }
3302
3303 const sd_bus_vtable manager_vtable[] = {
3304         SD_BUS_VTABLE_START(0),
3305
3306         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
3307         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
3308
3309         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
3310         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
3311         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
3312         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
3313         SD_BUS_PROPERTY("RebootParameter", "s", property_get_reboot_parameter, 0, 0),
3314         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, 0),
3315         SD_BUS_PROPERTY("RebootToBootLoaderMenu", "t", property_get_reboot_to_boot_loader_menu, 0, 0),
3316         SD_BUS_PROPERTY("RebootToBootLoaderEntry", "s", property_get_reboot_to_boot_loader_entry, 0, 0),
3317         SD_BUS_PROPERTY("BootLoaderEntries", "as", property_get_boot_loader_entries, 0, SD_BUS_VTABLE_PROPERTY_CONST),
3318         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3319         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3320         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3321         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3322         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
3323         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
3324         SD_BUS_PROPERTY("UserStopDelayUSec", "t", NULL, offsetof(Manager, user_stop_delay), SD_BUS_VTABLE_PROPERTY_CONST),
3325         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
3326         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
3327         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
3328         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
3329         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
3330         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
3331         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3332         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
3333         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
3334         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
3335         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
3336         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
3337         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
3338         SD_BUS_PROPERTY("LidClosed", "b", property_get_lid_closed, 0, 0),
3339         SD_BUS_PROPERTY("OnExternalPower", "b", property_get_on_external_power, 0, 0),
3340         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
3341         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
3342         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
3343         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
3344         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
3345         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
3346         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
3347
3348         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
3349         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
3350         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
3351         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
3352         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
3353         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
3354         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
3355         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
3356         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
3357         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
3358         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
3359         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
3360         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
3361         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
3362         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
3363         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
3364         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
3365         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
3366         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
3367         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
3368         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
3369         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
3370         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
3371         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
3372         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
3373         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
3374         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
3375         SD_BUS_METHOD("Halt", "b", NULL, method_halt, SD_BUS_VTABLE_UNPRIVILEGED),
3376         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
3377         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
3378         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
3379         SD_BUS_METHOD("SuspendThenHibernate", "b", NULL, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
3380         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
3381         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
3382         SD_BUS_METHOD("CanHalt", NULL, "s", method_can_halt, SD_BUS_VTABLE_UNPRIVILEGED),
3383         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
3384         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
3385         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
3386         SD_BUS_METHOD("CanSuspendThenHibernate", NULL, "s", method_can_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
3387         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
3388         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
3389         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
3390         SD_BUS_METHOD("CanRebootParameter", NULL, "s", method_can_reboot_parameter, SD_BUS_VTABLE_UNPRIVILEGED),
3391         SD_BUS_METHOD("SetRebootParameter", "s", NULL, method_set_reboot_parameter, SD_BUS_VTABLE_UNPRIVILEGED),
3392         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
3393         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
3394         SD_BUS_METHOD("CanRebootToBootLoaderMenu", NULL, "s", method_can_reboot_to_boot_loader_menu, SD_BUS_VTABLE_UNPRIVILEGED),
3395         SD_BUS_METHOD("SetRebootToBootLoaderMenu", "t", NULL, method_set_reboot_to_boot_loader_menu, SD_BUS_VTABLE_UNPRIVILEGED),
3396         SD_BUS_METHOD("CanRebootToBootLoaderEntry", NULL, "s", method_can_reboot_to_boot_loader_entry, SD_BUS_VTABLE_UNPRIVILEGED),
3397         SD_BUS_METHOD("SetRebootToBootLoaderEntry", "s", NULL, method_set_reboot_to_boot_loader_entry, SD_BUS_VTABLE_UNPRIVILEGED),
3398         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
3399
3400         SD_BUS_SIGNAL("SessionNew", "so", 0),
3401         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
3402         SD_BUS_SIGNAL("UserNew", "uo", 0),
3403         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
3404         SD_BUS_SIGNAL("SeatNew", "so", 0),
3405         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
3406         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
3407         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
3408
3409         SD_BUS_VTABLE_END
3410 };
3411
3412 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
3413         assert(s);
3414         assert(unit);
3415
3416         if (!s->started)
3417                 return 0;
3418
3419         if (result && !streq(result, "done")) {
3420                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
3421
3422                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED,
3423                                   "Start job for unit '%s' failed with '%s'", unit, result);
3424                 return session_send_create_reply(s, &e);
3425         }
3426
3427         return session_send_create_reply(s, NULL);
3428 }
3429
3430 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3431         const char *path, *result, *unit;
3432         Manager *m = userdata;
3433         Session *session;
3434         uint32_t id;
3435         User *user;
3436         int r;
3437
3438         assert(message);
3439         assert(m);
3440
3441         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
3442         if (r < 0) {
3443                 bus_log_parse_error(r);
3444                 return 0;
3445         }
3446
3447         if (m->action_job && streq(m->action_job, path)) {
3448                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
3449
3450                 /* Tell people that they now may take a lock again */
3451                 (void) send_prepare_for(m, m->action_what, false);
3452
3453                 m->action_job = mfree(m->action_job);
3454                 m->action_unit = NULL;
3455                 m->action_what = 0;
3456                 return 0;
3457         }
3458
3459         session = hashmap_get(m->session_units, unit);
3460         if (session) {
3461                 if (streq_ptr(path, session->scope_job)) {
3462                         session->scope_job = mfree(session->scope_job);
3463                         (void) session_jobs_reply(session, unit, result);
3464
3465                         session_save(session);
3466                         user_save(session->user);
3467                 }
3468
3469                 session_add_to_gc_queue(session);
3470         }
3471
3472         user = hashmap_get(m->user_units, unit);
3473         if (user) {
3474                 if (streq_ptr(path, user->service_job)) {
3475                         user->service_job = mfree(user->service_job);
3476
3477                         LIST_FOREACH(sessions_by_user, session, user->sessions)
3478                                 (void) session_jobs_reply(session, unit, NULL /* don't propagate user service failures to the client */);
3479
3480                         user_save(user);
3481                 }
3482
3483                 user_add_to_gc_queue(user);
3484         }
3485
3486         return 0;
3487 }
3488
3489 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3490         const char *path, *unit;
3491         Manager *m = userdata;
3492         Session *session;
3493         User *user;
3494         int r;
3495
3496         assert(message);
3497         assert(m);
3498
3499         r = sd_bus_message_read(message, "so", &unit, &path);
3500         if (r < 0) {
3501                 bus_log_parse_error(r);
3502                 return 0;
3503         }
3504
3505         session = hashmap_get(m->session_units, unit);
3506         if (session)
3507                 session_add_to_gc_queue(session);
3508
3509         user = hashmap_get(m->user_units, unit);
3510         if (user)
3511                 user_add_to_gc_queue(user);
3512
3513         return 0;
3514 }
3515
3516 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3517         _cleanup_free_ char *unit = NULL;
3518         Manager *m = userdata;
3519         const char *path;
3520         Session *session;
3521         User *user;
3522         int r;
3523
3524         assert(message);
3525         assert(m);
3526
3527         path = sd_bus_message_get_path(message);
3528         if (!path)
3529                 return 0;
3530
3531         r = unit_name_from_dbus_path(path, &unit);
3532         if (r == -EINVAL) /* not a unit */
3533                 return 0;
3534         if (r < 0) {
3535                 log_oom();
3536                 return 0;
3537         }
3538
3539         session = hashmap_get(m->session_units, unit);
3540         if (session)
3541                 session_add_to_gc_queue(session);
3542
3543         user = hashmap_get(m->user_units, unit);
3544         if (user)
3545                 user_add_to_gc_queue(user);
3546
3547         return 0;
3548 }
3549
3550 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
3551         Manager *m = userdata;
3552         Session *session;
3553         Iterator i;
3554         int b, r;
3555
3556         assert(message);
3557         assert(m);
3558
3559         r = sd_bus_message_read(message, "b", &b);
3560         if (r < 0) {
3561                 bus_log_parse_error(r);
3562                 return 0;
3563         }
3564
3565         if (b)
3566                 return 0;
3567
3568         /* systemd finished reloading, let's recheck all our sessions */
3569         log_debug("System manager has been reloaded, rechecking sessions...");
3570
3571         HASHMAP_FOREACH(session, m->sessions, i)
3572                 session_add_to_gc_queue(session);
3573
3574         return 0;
3575 }
3576
3577 int manager_send_changed(Manager *manager, const char *property, ...) {
3578         char **l;
3579
3580         assert(manager);
3581
3582         l = strv_from_stdarg_alloca(property);
3583
3584         return sd_bus_emit_properties_changed_strv(
3585                         manager->bus,
3586                         "/org/freedesktop/login1",
3587                         "org.freedesktop.login1.Manager",
3588                         l);
3589 }
3590
3591 static int strdup_job(sd_bus_message *reply, char **job) {
3592         const char *j;
3593         char *copy;
3594         int r;
3595
3596         r = sd_bus_message_read(reply, "o", &j);
3597         if (r < 0)
3598                 return r;
3599
3600         copy = strdup(j);
3601         if (!copy)
3602                 return -ENOMEM;
3603
3604         *job = copy;
3605         return 1;
3606 }
3607
3608 int manager_start_scope(
3609                 Manager *manager,
3610                 const char *scope,
3611                 pid_t pid,
3612                 const char *slice,
3613                 const char *description,
3614                 char **wants,
3615                 char **after,
3616                 const char *requires_mounts_for,
3617                 sd_bus_message *more_properties,
3618                 sd_bus_error *error,
3619                 char **job) {
3620
3621         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3622         char **i;
3623         int r;
3624
3625         assert(manager);
3626         assert(scope);
3627         assert(pid > 1);
3628         assert(job);
3629
3630         r = sd_bus_message_new_method_call(
3631                         manager->bus,
3632                         &m,
3633                         "org.freedesktop.systemd1",
3634                         "/org/freedesktop/systemd1",
3635                         "org.freedesktop.systemd1.Manager",
3636                         "StartTransientUnit");
3637         if (r < 0)
3638                 return r;
3639
3640         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3641         if (r < 0)
3642                 return r;
3643
3644         r = sd_bus_message_open_container(m, 'a', "(sv)");
3645         if (r < 0)
3646                 return r;
3647
3648         if (!isempty(slice)) {
3649                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3650                 if (r < 0)
3651                         return r;
3652         }
3653
3654         if (!isempty(description)) {
3655                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3656                 if (r < 0)
3657                         return r;
3658         }
3659
3660         STRV_FOREACH(i, wants) {
3661                 r = sd_bus_message_append(m, "(sv)", "Wants", "as", 1, *i);
3662                 if (r < 0)
3663                         return r;
3664         }
3665
3666         STRV_FOREACH(i, after) {
3667                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, *i);
3668                 if (r < 0)
3669                         return r;
3670         }
3671
3672         if (!empty_or_root(requires_mounts_for)) {
3673                 r = sd_bus_message_append(m, "(sv)", "RequiresMountsFor", "as", 1, requires_mounts_for);
3674                 if (r < 0)
3675                         return r;
3676         }
3677
3678         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
3679          * SIGTERM */
3680         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3681         if (r < 0)
3682                 return r;
3683
3684         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3685         if (r < 0)
3686                 return r;
3687
3688         /* disable TasksMax= for the session scope, rely on the slice setting for it */
3689         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
3690         if (r < 0)
3691                 return bus_log_create_error(r);
3692
3693         if (more_properties) {
3694                 /* If TasksMax also appears here, it will overwrite the default value set above */
3695                 r = sd_bus_message_copy(m, more_properties, true);
3696                 if (r < 0)
3697                         return r;
3698         }
3699
3700         r = sd_bus_message_close_container(m);
3701         if (r < 0)
3702                 return r;
3703
3704         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3705         if (r < 0)
3706                 return r;
3707
3708         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3709         if (r < 0)
3710                 return r;
3711
3712         return strdup_job(reply, job);
3713 }
3714
3715 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3716         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3717         int r;
3718
3719         assert(manager);
3720         assert(unit);
3721         assert(job);
3722
3723         r = sd_bus_call_method(
3724                         manager->bus,
3725                         "org.freedesktop.systemd1",
3726                         "/org/freedesktop/systemd1",
3727                         "org.freedesktop.systemd1.Manager",
3728                         "StartUnit",
3729                         error,
3730                         &reply,
3731                         "ss", unit, "replace");
3732         if (r < 0)
3733                 return r;
3734
3735         return strdup_job(reply, job);
3736 }
3737
3738 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3739         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3740         int r;
3741
3742         assert(manager);
3743         assert(unit);
3744         assert(job);
3745
3746         r = sd_bus_call_method(
3747                         manager->bus,
3748                         "org.freedesktop.systemd1",
3749                         "/org/freedesktop/systemd1",
3750                         "org.freedesktop.systemd1.Manager",
3751                         "StopUnit",
3752                         error,
3753                         &reply,
3754                         "ss", unit, "fail");
3755         if (r < 0) {
3756                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3757                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3758
3759                         *job = NULL;
3760                         sd_bus_error_free(error);
3761                         return 0;
3762                 }
3763
3764                 return r;
3765         }
3766
3767         return strdup_job(reply, job);
3768 }
3769
3770 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *ret_error) {
3771         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3772         _cleanup_free_ char *path = NULL;
3773         int r;
3774
3775         assert(manager);
3776         assert(scope);
3777
3778         path = unit_dbus_path_from_name(scope);
3779         if (!path)
3780                 return -ENOMEM;
3781
3782         r = sd_bus_call_method(
3783                         manager->bus,
3784                         "org.freedesktop.systemd1",
3785                         path,
3786                         "org.freedesktop.systemd1.Scope",
3787                         "Abandon",
3788                         &error,
3789                         NULL,
3790                         NULL);
3791         if (r < 0) {
3792                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3793                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED) ||
3794                     sd_bus_error_has_name(&error, BUS_ERROR_SCOPE_NOT_RUNNING))
3795                         return 0;
3796
3797                 sd_bus_error_move(ret_error, &error);
3798                 return r;
3799         }
3800
3801         return 1;
3802 }
3803
3804 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3805         assert(manager);
3806         assert(unit);
3807
3808         return sd_bus_call_method(
3809                         manager->bus,
3810                         "org.freedesktop.systemd1",
3811                         "/org/freedesktop/systemd1",
3812                         "org.freedesktop.systemd1.Manager",
3813                         "KillUnit",
3814                         error,
3815                         NULL,
3816                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3817 }
3818
3819 int manager_unit_is_active(Manager *manager, const char *unit, sd_bus_error *ret_error) {
3820         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3821         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3822         _cleanup_free_ char *path = NULL;
3823         const char *state;
3824         int r;
3825
3826         assert(manager);
3827         assert(unit);
3828
3829         path = unit_dbus_path_from_name(unit);
3830         if (!path)
3831                 return -ENOMEM;
3832
3833         r = sd_bus_get_property(
3834                         manager->bus,
3835                         "org.freedesktop.systemd1",
3836                         path,
3837                         "org.freedesktop.systemd1.Unit",
3838                         "ActiveState",
3839                         &error,
3840                         &reply,
3841                         "s");
3842         if (r < 0) {
3843                 /* systemd might have dropped off momentarily, let's
3844                  * not make this an error */
3845                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3846                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3847                         return true;
3848
3849                 /* If the unit is already unloaded then it's not
3850                  * active */
3851                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3852                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3853                         return false;
3854
3855                 sd_bus_error_move(ret_error, &error);
3856                 return r;
3857         }
3858
3859         r = sd_bus_message_read(reply, "s", &state);
3860         if (r < 0)
3861                 return r;
3862
3863         return !STR_IN_SET(state, "inactive", "failed");
3864 }
3865
3866 int manager_job_is_active(Manager *manager, const char *path, sd_bus_error *ret_error) {
3867         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3868         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3869         int r;
3870
3871         assert(manager);
3872         assert(path);
3873
3874         r = sd_bus_get_property(
3875                         manager->bus,
3876                         "org.freedesktop.systemd1",
3877                         path,
3878                         "org.freedesktop.systemd1.Job",
3879                         "State",
3880                         &error,
3881                         &reply,
3882                         "s");
3883         if (r < 0) {
3884                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3885                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3886                         return true;
3887
3888                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3889                         return false;
3890
3891                 sd_bus_error_move(ret_error, &error);
3892                 return r;
3893         }
3894
3895         /* We don't actually care about the state really. The fact
3896          * that we could read the job state is enough for us */
3897
3898         return true;
3899 }