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