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-messages.h"
   9
  10 #include "alloc-util.h"
  11 #include "audit-util.h"
  12 #include "bus-common-errors.h"
  13 #include "bus-error.h"
  14 #include "bus-unit-util.h"
  15 #include "bus-util.h"
  16 #include "dirent-util.h"
  17 #include "efivars.h"
  18 #include "escape.h"
  19 #include "fd-util.h"
  20 #include "fileio-label.h"
  21 #include "format-util.h"
  22 #include "fs-util.h"
  23 #include "logind.h"
  24 #include "mkdir.h"
  25 #include "path-util.h"
  26 #include "process-util.h"
  27 #include "cgroup-util.h"
  28 #include "selinux-util.h"
  29 #include "sleep-config.h"
  30 #include "special.h"
  31 #include "strv.h"
  32 #include "terminal-util.h"
  33 #include "udev-util.h"
  34 #include "unit-name.h"
  35 #include "user-util.h"
  36 #include "utmp-wtmp.h"
  37
  38 static int get_sender_session(Manager *m, sd_bus_message *message, sd_bus_error *error, Session **ret) {
  39
  40         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  41         const char *name;
  42         Session *session;
  43         int r;
  44
  45         /* Get client login session.  This is not what you are looking for these days,
  46          * as apps may instead belong to a user service unit.  This includes terminal
  47          * emulators and hence command-line apps. */
  48         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  49         if (r < 0)
  50                 return r;
  51
  52         r = sd_bus_creds_get_session(creds, &name);
  53         if (r == -ENXIO)
  54                 goto err_no_session;
  55         if (r < 0)
  56                 return r;
  57
  58         session = hashmap_get(m->sessions, name);
  59         if (!session)
  60                 goto err_no_session;
  61
  62         *ret = session;
  63         return 0;
  64
  65 err_no_session:
  66         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
  67                                  "Caller does not belong to any known session");
  68 }
  69
  70 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  71         Session *session;
  72
  73         assert(m);
  74         assert(message);
  75         assert(ret);
  76
  77         if (isempty(name))
  78                 return get_sender_session(m, message, error, ret);
  79
  80         session = hashmap_get(m->sessions, name);
  81         if (!session)
  82                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  83
  84         *ret = session;
  85         return 0;
  86 }
  87
  88 static int get_sender_user(Manager *m, sd_bus_message *message, sd_bus_error *error, User **ret) {
  89
  90         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  91         uid_t uid;
  92         User *user;
  93         int r;
  94
  95         /* Note that we get the owner UID of the session, not the actual client UID here! */
  96         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
  97         if (r < 0)
  98                 return r;
  99
 100         r = sd_bus_creds_get_owner_uid(creds, &uid);
 101         if (r == -ENXIO)
 102                 goto err_no_user;
 103         if (r < 0)
 104                 return r;
 105
 106         user = hashmap_get(m->users, UID_TO_PTR(uid));
 107         if (!user)
 108                 goto err_no_user;
 109
 110         *ret = user;
 111         return 0;
 112
 113 err_no_user:
 114         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "Caller does not belong to any logged in user or lingering user");
 115 }
 116
 117 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
 118         User *user;
 119
 120         assert(m);
 121         assert(message);
 122         assert(ret);
 123
 124         if (!uid_is_valid(uid))
 125                 return get_sender_user(m, message, error, ret);
 126
 127         user = hashmap_get(m->users, UID_TO_PTR(uid));
 128         if (!user)
 129                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "User ID "UID_FMT" is not logged in or lingering", uid);
 130
 131         *ret = user;
 132         return 0;
 133 }
 134
 135 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 136         Seat *seat;
 137         int r;
 138
 139         assert(m);
 140         assert(message);
 141         assert(ret);
 142
 143         if (isempty(name)) {
 144                 Session *session;
 145
 146                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 147                 if (r < 0)
 148                         return r;
 149
 150                 seat = session->seat;
 151                 if (!seat)
 152                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 153         } else {
 154                 seat = hashmap_get(m->seats, name);
 155                 if (!seat)
 156                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 157         }
 158
 159         *ret = seat;
 160         return 0;
 161 }
 162
 163 static int property_get_idle_hint(
 164                 sd_bus *bus,
 165                 const char *path,
 166                 const char *interface,
 167                 const char *property,
 168                 sd_bus_message *reply,
 169                 void *userdata,
 170                 sd_bus_error *error) {
 171
 172         Manager *m = userdata;
 173
 174         assert(bus);
 175         assert(reply);
 176         assert(m);
 177
 178         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 179 }
 180
 181 static int property_get_idle_since_hint(
 182                 sd_bus *bus,
 183                 const char *path,
 184                 const char *interface,
 185                 const char *property,
 186                 sd_bus_message *reply,
 187                 void *userdata,
 188                 sd_bus_error *error) {
 189
 190         Manager *m = userdata;
 191         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 192
 193         assert(bus);
 194         assert(reply);
 195         assert(m);
 196
 197         manager_get_idle_hint(m, &t);
 198
 199         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 200 }
 201
 202 static int property_get_inhibited(
 203                 sd_bus *bus,
 204                 const char *path,
 205                 const char *interface,
 206                 const char *property,
 207                 sd_bus_message *reply,
 208                 void *userdata,
 209                 sd_bus_error *error) {
 210
 211         Manager *m = userdata;
 212         InhibitWhat w;
 213
 214         assert(bus);
 215         assert(reply);
 216         assert(m);
 217
 218         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 219
 220         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 221 }
 222
 223 static int property_get_preparing(
 224                 sd_bus *bus,
 225                 const char *path,
 226                 const char *interface,
 227                 const char *property,
 228                 sd_bus_message *reply,
 229                 void *userdata,
 230                 sd_bus_error *error) {
 231
 232         Manager *m = userdata;
 233         bool b;
 234
 235         assert(bus);
 236         assert(reply);
 237         assert(m);
 238
 239         if (streq(property, "PreparingForShutdown"))
 240                 b = m->action_what & INHIBIT_SHUTDOWN;
 241         else
 242                 b = m->action_what & INHIBIT_SLEEP;
 243
 244         return sd_bus_message_append(reply, "b", b);
 245 }
 246
 247 static int property_get_scheduled_shutdown(
 248                 sd_bus *bus,
 249                 const char *path,
 250                 const char *interface,
 251                 const char *property,
 252                 sd_bus_message *reply,
 253                 void *userdata,
 254                 sd_bus_error *error) {
 255
 256         Manager *m = userdata;
 257         int r;
 258
 259         assert(bus);
 260         assert(reply);
 261         assert(m);
 262
 263         r = sd_bus_message_open_container(reply, 'r', "st");
 264         if (r < 0)
 265                 return r;
 266
 267         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 268         if (r < 0)
 269                 return r;
 270
 271         return sd_bus_message_close_container(reply);
 272 }
 273
 274 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 275 static BUS_DEFINE_PROPERTY_GET(property_get_docked, "b", Manager, manager_is_docked_or_external_displays);
 276 static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_compat_user_tasks_max, "t", CGROUP_LIMIT_MAX);
 277 static BUS_DEFINE_PROPERTY_GET_REF(property_get_hashmap_size, "t", Hashmap *, (uint64_t) hashmap_size);
 278
 279 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 280         _cleanup_free_ char *p = NULL;
 281         Manager *m = userdata;
 282         const char *name;
 283         Session *session;
 284         int r;
 285
 286         assert(message);
 287         assert(m);
 288
 289         r = sd_bus_message_read(message, "s", &name);
 290         if (r < 0)
 291                 return r;
 292
 293         r = manager_get_session_from_creds(m, message, name, error, &session);
 294         if (r < 0)
 295                 return r;
 296
 297         p = session_bus_path(session);
 298         if (!p)
 299                 return -ENOMEM;
 300
 301         return sd_bus_reply_method_return(message, "o", p);
 302 }
 303
 304 /* Get login session of a process.  This is not what you are looking for these days,
 305  * as apps may instead belong to a user service unit.  This includes terminal
 306  * emulators and hence command-line apps. */
 307 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 308         _cleanup_free_ char *p = NULL;
 309         Session *session = NULL;
 310         Manager *m = userdata;
 311         pid_t pid;
 312         int r;
 313
 314         assert(message);
 315         assert(m);
 316
 317         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 318
 319         r = sd_bus_message_read(message, "u", &pid);
 320         if (r < 0)
 321                 return r;
 322         if (pid < 0)
 323                 return -EINVAL;
 324
 325         if (pid == 0) {
 326                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 327                 if (r < 0)
 328                         return r;
 329         } else {
 330                 r = manager_get_session_by_pid(m, pid, &session);
 331                 if (r < 0)
 332                         return r;
 333
 334                 if (!session)
 335                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 336         }
 337
 338         p = session_bus_path(session);
 339         if (!p)
 340                 return -ENOMEM;
 341
 342         return sd_bus_reply_method_return(message, "o", p);
 343 }
 344
 345 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 346         _cleanup_free_ char *p = NULL;
 347         Manager *m = userdata;
 348         uint32_t uid;
 349         User *user;
 350         int r;
 351
 352         assert(message);
 353         assert(m);
 354
 355         r = sd_bus_message_read(message, "u", &uid);
 356         if (r < 0)
 357                 return r;
 358
 359         r = manager_get_user_from_creds(m, message, uid, error, &user);
 360         if (r < 0)
 361                 return r;
 362
 363         p = user_bus_path(user);
 364         if (!p)
 365                 return -ENOMEM;
 366
 367         return sd_bus_reply_method_return(message, "o", p);
 368 }
 369
 370 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 371         _cleanup_free_ char *p = NULL;
 372         Manager *m = userdata;
 373         User *user = NULL;
 374         pid_t pid;
 375         int r;
 376
 377         assert(message);
 378         assert(m);
 379
 380         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 381
 382         r = sd_bus_message_read(message, "u", &pid);
 383         if (r < 0)
 384                 return r;
 385         if (pid < 0)
 386                 return -EINVAL;
 387
 388         if (pid == 0) {
 389                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 390                 if (r < 0)
 391                         return r;
 392         } else {
 393                 r = manager_get_user_by_pid(m, pid, &user);
 394                 if (r < 0)
 395                         return r;
 396                 if (!user)
 397                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID,
 398                                                  "PID "PID_FMT" does not belong to any logged in user or lingering user",
 399                                                  pid);
 400         }
 401
 402         p = user_bus_path(user);
 403         if (!p)
 404                 return -ENOMEM;
 405
 406         return sd_bus_reply_method_return(message, "o", p);
 407 }
 408
 409 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 410         _cleanup_free_ char *p = NULL;
 411         Manager *m = userdata;
 412         const char *name;
 413         Seat *seat;
 414         int r;
 415
 416         assert(message);
 417         assert(m);
 418
 419         r = sd_bus_message_read(message, "s", &name);
 420         if (r < 0)
 421                 return r;
 422
 423         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 424         if (r < 0)
 425                 return r;
 426
 427         p = seat_bus_path(seat);
 428         if (!p)
 429                 return -ENOMEM;
 430
 431         return sd_bus_reply_method_return(message, "o", p);
 432 }
 433
 434 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 435         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 436         Manager *m = userdata;
 437         Session *session;
 438         Iterator i;
 439         int r;
 440
 441         assert(message);
 442         assert(m);
 443
 444         r = sd_bus_message_new_method_return(message, &reply);
 445         if (r < 0)
 446                 return r;
 447
 448         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 449         if (r < 0)
 450                 return r;
 451
 452         HASHMAP_FOREACH(session, m->sessions, i) {
 453                 _cleanup_free_ char *p = NULL;
 454
 455                 p = session_bus_path(session);
 456                 if (!p)
 457                         return -ENOMEM;
 458
 459                 r = sd_bus_message_append(reply, "(susso)",
 460                                           session->id,
 461                                           (uint32_t) session->user->uid,
 462                                           session->user->name,
 463                                           session->seat ? session->seat->id : "",
 464                                           p);
 465                 if (r < 0)
 466                         return r;
 467         }
 468
 469         r = sd_bus_message_close_container(reply);
 470         if (r < 0)
 471                 return r;
 472
 473         return sd_bus_send(NULL, reply, NULL);
 474 }
 475
 476 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 477         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 478         Manager *m = userdata;
 479         User *user;
 480         Iterator i;
 481         int r;
 482
 483         assert(message);
 484         assert(m);
 485
 486         r = sd_bus_message_new_method_return(message, &reply);
 487         if (r < 0)
 488                 return r;
 489
 490         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 491         if (r < 0)
 492                 return r;
 493
 494         HASHMAP_FOREACH(user, m->users, i) {
 495                 _cleanup_free_ char *p = NULL;
 496
 497                 p = user_bus_path(user);
 498                 if (!p)
 499                         return -ENOMEM;
 500
 501                 r = sd_bus_message_append(reply, "(uso)",
 502                                           (uint32_t) user->uid,
 503                                           user->name,
 504                                           p);
 505                 if (r < 0)
 506                         return r;
 507         }
 508
 509         r = sd_bus_message_close_container(reply);
 510         if (r < 0)
 511                 return r;
 512
 513         return sd_bus_send(NULL, reply, NULL);
 514 }
 515
 516 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 517         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 518         Manager *m = userdata;
 519         Seat *seat;
 520         Iterator i;
 521         int r;
 522
 523         assert(message);
 524         assert(m);
 525
 526         r = sd_bus_message_new_method_return(message, &reply);
 527         if (r < 0)
 528                 return r;
 529
 530         r = sd_bus_message_open_container(reply, 'a', "(so)");
 531         if (r < 0)
 532                 return r;
 533
 534         HASHMAP_FOREACH(seat, m->seats, i) {
 535                 _cleanup_free_ char *p = NULL;
 536
 537                 p = seat_bus_path(seat);
 538                 if (!p)
 539                         return -ENOMEM;
 540
 541                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 542                 if (r < 0)
 543                         return r;
 544         }
 545
 546         r = sd_bus_message_close_container(reply);
 547         if (r < 0)
 548                 return r;
 549
 550         return sd_bus_send(NULL, reply, NULL);
 551 }
 552
 553 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 554         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 555         Manager *m = userdata;
 556         Inhibitor *inhibitor;
 557         Iterator i;
 558         int r;
 559
 560         assert(message);
 561         assert(m);
 562
 563         r = sd_bus_message_new_method_return(message, &reply);
 564         if (r < 0)
 565                 return r;
 566
 567         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 568         if (r < 0)
 569                 return r;
 570
 571         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 572
 573                 r = sd_bus_message_append(reply, "(ssssuu)",
 574                                           strempty(inhibit_what_to_string(inhibitor->what)),
 575                                           strempty(inhibitor->who),
 576                                           strempty(inhibitor->why),
 577                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 578                                           (uint32_t) inhibitor->uid,
 579                                           (uint32_t) inhibitor->pid);
 580                 if (r < 0)
 581                         return r;
 582         }
 583
 584         r = sd_bus_message_close_container(reply);
 585         if (r < 0)
 586                 return r;
 587
 588         return sd_bus_send(NULL, reply, NULL);
 589 }
 590
 591 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 592         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 593         _cleanup_free_ char *id = NULL;
 594         Session *session = NULL;
 595         uint32_t audit_id = 0;
 596         Manager *m = userdata;
 597         User *user = NULL;
 598         Seat *seat = NULL;
 599         pid_t leader;
 600         uid_t uid;
 601         int remote;
 602         uint32_t vtnr = 0;
 603         SessionType t;
 604         SessionClass c;
 605         int r;
 606
 607         assert(message);
 608         assert(m);
 609
 610         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 611         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 612
 613         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 614         if (r < 0)
 615                 return r;
 616
 617         if (!uid_is_valid(uid))
 618                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 619         if (leader < 0 || leader == 1 || leader == getpid_cached())
 620                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 621
 622         if (isempty(type))
 623                 t = _SESSION_TYPE_INVALID;
 624         else {
 625                 t = session_type_from_string(type);
 626                 if (t < 0)
 627                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 628         }
 629
 630         if (isempty(class))
 631                 c = _SESSION_CLASS_INVALID;
 632         else {
 633                 c = session_class_from_string(class);
 634                 if (c < 0)
 635                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 636         }
 637
 638         if (isempty(desktop))
 639                 desktop = NULL;
 640         else {
 641                 if (!string_is_safe(desktop))
 642                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 643         }
 644
 645         if (isempty(cseat))
 646                 seat = NULL;
 647         else {
 648                 seat = hashmap_get(m->seats, cseat);
 649                 if (!seat)
 650                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 651         }
 652
 653         if (tty_is_vc(tty)) {
 654                 int v;
 655
 656                 if (!seat)
 657                         seat = m->seat0;
 658                 else if (seat != m->seat0)
 659                         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);
 660
 661                 v = vtnr_from_tty(tty);
 662                 if (v <= 0)
 663                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 664
 665                 if (vtnr == 0)
 666                         vtnr = (uint32_t) v;
 667                 else if (vtnr != (uint32_t) v)
 668                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 669
 670         } else if (tty_is_console(tty)) {
 671
 672                 if (!seat)
 673                         seat = m->seat0;
 674                 else if (seat != m->seat0)
 675                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 676
 677                 if (vtnr != 0)
 678                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 679         }
 680
 681         if (seat) {
 682                 if (seat_has_vts(seat)) {
 683                         if (vtnr <= 0 || vtnr > 63)
 684                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 685                 } else {
 686                         if (vtnr != 0)
 687                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 688                 }
 689         }
 690
 691         if (t == _SESSION_TYPE_INVALID) {
 692                 if (!isempty(display))
 693                         t = SESSION_X11;
 694                 else if (!isempty(tty))
 695                         t = SESSION_TTY;
 696                 else
 697                         t = SESSION_UNSPECIFIED;
 698         }
 699
 700         if (c == _SESSION_CLASS_INVALID) {
 701                 if (t == SESSION_UNSPECIFIED)
 702                         c = SESSION_BACKGROUND;
 703                 else
 704                         c = SESSION_USER;
 705         }
 706
 707         if (leader == 0) {
 708                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 709
 710                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 711                 if (r < 0)
 712                         return r;
 713
 714                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 715                 if (r < 0)
 716                         return r;
 717         }
 718
 719         /* Check if we are already in a logind session. Or if we are in user@.service which is a special PAM session
 720          * that avoids creating a logind session. */
 721         r = manager_get_user_by_pid(m, leader, NULL);
 722         if (r < 0)
 723                 return r;
 724         if (r > 0)
 725                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session or user slice");
 726
 727         /*
 728          * Old gdm and lightdm start the user-session on the same VT as
 729          * the greeter session. But they destroy the greeter session
 730          * after the user-session and want the user-session to take
 731          * over the VT. We need to support this for
 732          * backwards-compatibility, so make sure we allow new sessions
 733          * on a VT that a greeter is running on. Furthermore, to allow
 734          * re-logins, we have to allow a greeter to take over a used VT for
 735          * the exact same reasons.
 736          */
 737         if (c != SESSION_GREETER &&
 738             vtnr > 0 &&
 739             vtnr < m->seat0->position_count &&
 740             m->seat0->positions[vtnr] &&
 741             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 742                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 743
 744         if (hashmap_size(m->sessions) >= m->sessions_max)
 745                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 746
 747         (void) audit_session_from_pid(leader, &audit_id);
 748         if (audit_session_is_valid(audit_id)) {
 749                 /* Keep our session IDs and the audit session IDs in sync */
 750
 751                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 752                         return -ENOMEM;
 753
 754                 /* Wut? There's already a session by this name and we
 755                  * didn't find it above? Weird, then let's not trust
 756                  * the audit data and let's better register a new
 757                  * ID */
 758                 if (hashmap_get(m->sessions, id)) {
 759                         log_warning("Existing logind session ID %s used by new audit session, ignoring.", id);
 760                         audit_id = AUDIT_SESSION_INVALID;
 761                         id = mfree(id);
 762                 }
 763         }
 764
 765         if (!id) {
 766                 do {
 767                         id = mfree(id);
 768
 769                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 770                                 return -ENOMEM;
 771
 772                 } while (hashmap_get(m->sessions, id));
 773         }
 774
 775         r = manager_add_user_by_uid(m, uid, &user);
 776         if (r < 0)
 777                 goto fail;
 778
 779         r = manager_add_session(m, id, &session);
 780         if (r < 0)
 781                 goto fail;
 782
 783         session_set_user(session, user);
 784
 785         session->leader = leader;
 786         session->audit_id = audit_id;
 787         session->type = t;
 788         session->class = c;
 789         session->remote = remote;
 790         session->vtnr = vtnr;
 791
 792         if (!isempty(tty)) {
 793                 session->tty = strdup(tty);
 794                 if (!session->tty) {
 795                         r = -ENOMEM;
 796                         goto fail;
 797                 }
 798         }
 799
 800         if (!isempty(display)) {
 801                 session->display = strdup(display);
 802                 if (!session->display) {
 803                         r = -ENOMEM;
 804                         goto fail;
 805                 }
 806         }
 807
 808         if (!isempty(remote_user)) {
 809                 session->remote_user = strdup(remote_user);
 810                 if (!session->remote_user) {
 811                         r = -ENOMEM;
 812                         goto fail;
 813                 }
 814         }
 815
 816         if (!isempty(remote_host)) {
 817                 session->remote_host = strdup(remote_host);
 818                 if (!session->remote_host) {
 819                         r = -ENOMEM;
 820                         goto fail;
 821                 }
 822         }
 823
 824         if (!isempty(service)) {
 825                 session->service = strdup(service);
 826                 if (!session->service) {
 827                         r = -ENOMEM;
 828                         goto fail;
 829                 }
 830         }
 831
 832         if (!isempty(desktop)) {
 833                 session->desktop = strdup(desktop);
 834                 if (!session->desktop) {
 835                         r = -ENOMEM;
 836                         goto fail;
 837                 }
 838         }
 839
 840         if (seat) {
 841                 r = seat_attach_session(seat, session);
 842                 if (r < 0)
 843                         goto fail;
 844         }
 845
 846         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 847         if (r < 0)
 848                 return r;
 849
 850         r = session_start(session, message);
 851         if (r < 0)
 852                 goto fail;
 853
 854         r = sd_bus_message_exit_container(message);
 855         if (r < 0)
 856                 goto fail;
 857
 858         session->create_message = sd_bus_message_ref(message);
 859
 860         /* Now, let's wait until the slice unit and stuff got created. We send the reply back from
 861          * session_send_create_reply(). */
 862
 863         return 1;
 864
 865 fail:
 866         if (session)
 867                 session_add_to_gc_queue(session);
 868
 869         if (user)
 870                 user_add_to_gc_queue(user);
 871
 872         return r;
 873 }
 874
 875 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 876         Manager *m = userdata;
 877         Session *session;
 878         const char *name;
 879         int r;
 880
 881         assert(message);
 882         assert(m);
 883
 884         r = sd_bus_message_read(message, "s", &name);
 885         if (r < 0)
 886                 return r;
 887
 888         r = manager_get_session_from_creds(m, message, name, error, &session);
 889         if (r < 0)
 890                 return r;
 891
 892         r = session_release(session);
 893         if (r < 0)
 894                 return r;
 895
 896         return sd_bus_reply_method_return(message, NULL);
 897 }
 898
 899 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 900         Manager *m = userdata;
 901         Session *session;
 902         const char *name;
 903         int r;
 904
 905         assert(message);
 906         assert(m);
 907
 908         r = sd_bus_message_read(message, "s", &name);
 909         if (r < 0)
 910                 return r;
 911
 912         r = manager_get_session_from_creds(m, message, name, error, &session);
 913         if (r < 0)
 914                 return r;
 915
 916         return bus_session_method_activate(message, session, error);
 917 }
 918
 919 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 920         const char *session_name, *seat_name;
 921         Manager *m = userdata;
 922         Session *session;
 923         Seat *seat;
 924         int r;
 925
 926         assert(message);
 927         assert(m);
 928
 929         /* Same as ActivateSession() but refuses to work if
 930          * the seat doesn't match */
 931
 932         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 933         if (r < 0)
 934                 return r;
 935
 936         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 937         if (r < 0)
 938                 return r;
 939
 940         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 941         if (r < 0)
 942                 return r;
 943
 944         if (session->seat != seat)
 945                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 946
 947         r = session_activate(session);
 948         if (r < 0)
 949                 return r;
 950
 951         return sd_bus_reply_method_return(message, NULL);
 952 }
 953
 954 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 955         Manager *m = userdata;
 956         Session *session;
 957         const char *name;
 958         int r;
 959
 960         assert(message);
 961         assert(m);
 962
 963         r = sd_bus_message_read(message, "s", &name);
 964         if (r < 0)
 965                 return r;
 966
 967         r = manager_get_session_from_creds(m, message, name, error, &session);
 968         if (r < 0)
 969                 return r;
 970
 971         return bus_session_method_lock(message, session, error);
 972 }
 973
 974 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 975         Manager *m = userdata;
 976         int r;
 977
 978         assert(message);
 979         assert(m);
 980
 981         r = bus_verify_polkit_async(
 982                         message,
 983                         CAP_SYS_ADMIN,
 984                         "org.freedesktop.login1.lock-sessions",
 985                         NULL,
 986                         false,
 987                         UID_INVALID,
 988                         &m->polkit_registry,
 989                         error);
 990         if (r < 0)
 991                 return r;
 992         if (r == 0)
 993                 return 1; /* Will call us back */
 994
 995         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
 996         if (r < 0)
 997                 return r;
 998
 999         return sd_bus_reply_method_return(message, NULL);
1000 }
1001
1002 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1003         const char *name;
1004         Manager *m = userdata;
1005         Session *session;
1006         int r;
1007
1008         assert(message);
1009         assert(m);
1010
1011         r = sd_bus_message_read(message, "s", &name);
1012         if (r < 0)
1013                 return r;
1014
1015         r = manager_get_session_from_creds(m, message, name, error, &session);
1016         if (r < 0)
1017                 return r;
1018
1019         return bus_session_method_kill(message, session, error);
1020 }
1021
1022 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1023         Manager *m = userdata;
1024         uint32_t uid;
1025         User *user;
1026         int r;
1027
1028         assert(message);
1029         assert(m);
1030
1031         r = sd_bus_message_read(message, "u", &uid);
1032         if (r < 0)
1033                 return r;
1034
1035         r = manager_get_user_from_creds(m, message, uid, error, &user);
1036         if (r < 0)
1037                 return r;
1038
1039         return bus_user_method_kill(message, user, error);
1040 }
1041
1042 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1043         Manager *m = userdata;
1044         const char *name;
1045         Session *session;
1046         int r;
1047
1048         assert(message);
1049         assert(m);
1050
1051         r = sd_bus_message_read(message, "s", &name);
1052         if (r < 0)
1053                 return r;
1054
1055         r = manager_get_session_from_creds(m, message, name, error, &session);
1056         if (r < 0)
1057                 return r;
1058
1059         return bus_session_method_terminate(message, session, error);
1060 }
1061
1062 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1063         Manager *m = userdata;
1064         uint32_t uid;
1065         User *user;
1066         int r;
1067
1068         assert(message);
1069         assert(m);
1070
1071         r = sd_bus_message_read(message, "u", &uid);
1072         if (r < 0)
1073                 return r;
1074
1075         r = manager_get_user_from_creds(m, message, uid, error, &user);
1076         if (r < 0)
1077                 return r;
1078
1079         return bus_user_method_terminate(message, user, error);
1080 }
1081
1082 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1083         Manager *m = userdata;
1084         const char *name;
1085         Seat *seat;
1086         int r;
1087
1088         assert(message);
1089         assert(m);
1090
1091         r = sd_bus_message_read(message, "s", &name);
1092         if (r < 0)
1093                 return r;
1094
1095         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1096         if (r < 0)
1097                 return r;
1098
1099         return bus_seat_method_terminate(message, seat, error);
1100 }
1101
1102 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1103         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1104         _cleanup_free_ char *cc = NULL;
1105         Manager *m = userdata;
1106         int r, b, interactive;
1107         struct passwd *pw;
1108         const char *path;
1109         uint32_t uid, auth_uid;
1110
1111         assert(message);
1112         assert(m);
1113
1114         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1115         if (r < 0)
1116                 return r;
1117
1118         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID |
1119                                                SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1120         if (r < 0)
1121                 return r;
1122
1123         if (!uid_is_valid(uid)) {
1124                 /* Note that we get the owner UID of the session or user unit,
1125                  * not the actual client UID here! */
1126                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1127                 if (r < 0)
1128                         return r;
1129         }
1130
1131         /* owner_uid is racy, so for authorization we must use euid */
1132         r = sd_bus_creds_get_euid(creds, &auth_uid);
1133         if (r < 0)
1134                 return r;
1135
1136         errno = 0;
1137         pw = getpwuid(uid);
1138         if (!pw)
1139                 return errno > 0 ? -errno : -ENOENT;
1140
1141         r = bus_verify_polkit_async(
1142                         message,
1143                         CAP_SYS_ADMIN,
1144                         uid == auth_uid ? "org.freedesktop.login1.set-self-linger" :
1145                                           "org.freedesktop.login1.set-user-linger",
1146                         NULL,
1147                         interactive,
1148                         UID_INVALID,
1149                         &m->polkit_registry,
1150                         error);
1151         if (r < 0)
1152                 return r;
1153         if (r == 0)
1154                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1155
1156         mkdir_p_label("/var/lib/systemd", 0755);
1157
1158         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE);
1159         if (r < 0)
1160                 return r;
1161
1162         cc = cescape(pw->pw_name);
1163         if (!cc)
1164                 return -ENOMEM;
1165
1166         path = strjoina("/var/lib/systemd/linger/", cc);
1167         if (b) {
1168                 User *u;
1169
1170                 r = touch(path);
1171                 if (r < 0)
1172                         return r;
1173
1174                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1175                         user_start(u);
1176
1177         } else {
1178                 User *u;
1179
1180                 r = unlink(path);
1181                 if (r < 0 && errno != ENOENT)
1182                         return -errno;
1183
1184                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1185                 if (u)
1186                         user_add_to_gc_queue(u);
1187         }
1188
1189         return sd_bus_reply_method_return(message, NULL);
1190 }
1191
1192 static int trigger_device(Manager *m, struct udev_device *d) {
1193         _cleanup_(udev_enumerate_unrefp) struct udev_enumerate *e = NULL;
1194         struct udev_list_entry *first, *item;
1195         int r;
1196
1197         assert(m);
1198
1199         e = udev_enumerate_new(m->udev);
1200         if (!e)
1201                 return -ENOMEM;
1202
1203         if (d) {
1204                 r = udev_enumerate_add_match_parent(e, d);
1205                 if (r < 0)
1206                         return r;
1207         }
1208
1209         r = udev_enumerate_scan_devices(e);
1210         if (r < 0)
1211                 return r;
1212
1213         first = udev_enumerate_get_list_entry(e);
1214         udev_list_entry_foreach(item, first) {
1215                 _cleanup_free_ char *t = NULL;
1216                 const char *p;
1217
1218                 p = udev_list_entry_get_name(item);
1219
1220                 t = strappend(p, "/uevent");
1221                 if (!t)
1222                         return -ENOMEM;
1223
1224                 (void) write_string_file(t, "change", 0);
1225         }
1226
1227         return 0;
1228 }
1229
1230 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1231         _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
1232         _cleanup_free_ char *rule = NULL, *file = NULL;
1233         const char *id_for_seat;
1234         int r;
1235
1236         assert(m);
1237         assert(seat);
1238         assert(sysfs);
1239
1240         d = udev_device_new_from_syspath(m->udev, sysfs);
1241         if (!d)
1242                 return -ENODEV;
1243
1244         if (!udev_device_has_tag(d, "seat"))
1245                 return -ENODEV;
1246
1247         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1248         if (!id_for_seat)
1249                 return -ENODEV;
1250
1251         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1252                 return -ENOMEM;
1253
1254         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1255                 return -ENOMEM;
1256
1257         mkdir_p_label("/etc/udev/rules.d", 0755);
1258         r = write_string_file_atomic_label(file, rule);
1259         if (r < 0)
1260                 return r;
1261
1262         return trigger_device(m, d);
1263 }
1264
1265 static int flush_devices(Manager *m) {
1266         _cleanup_closedir_ DIR *d;
1267
1268         assert(m);
1269
1270         d = opendir("/etc/udev/rules.d");
1271         if (!d) {
1272                 if (errno != ENOENT)
1273                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1274         } else {
1275                 struct dirent *de;
1276
1277                 FOREACH_DIRENT_ALL(de, d, break) {
1278                         if (!dirent_is_file(de))
1279                                 continue;
1280
1281                         if (!startswith(de->d_name, "72-seat-"))
1282                                 continue;
1283
1284                         if (!endswith(de->d_name, ".rules"))
1285                                 continue;
1286
1287                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1288                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1289                 }
1290         }
1291
1292         return trigger_device(m, NULL);
1293 }
1294
1295 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1296         const char *sysfs, *seat;
1297         Manager *m = userdata;
1298         int interactive, r;
1299
1300         assert(message);
1301         assert(m);
1302
1303         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1304         if (r < 0)
1305                 return r;
1306
1307         if (!path_startswith(sysfs, "/sys"))
1308                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1309
1310         if (!seat_name_is_valid(seat))
1311                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1312
1313         r = bus_verify_polkit_async(
1314                         message,
1315                         CAP_SYS_ADMIN,
1316                         "org.freedesktop.login1.attach-device",
1317                         NULL,
1318                         interactive,
1319                         UID_INVALID,
1320                         &m->polkit_registry,
1321                         error);
1322         if (r < 0)
1323                 return r;
1324         if (r == 0)
1325                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1326
1327         r = attach_device(m, seat, sysfs);
1328         if (r < 0)
1329                 return r;
1330
1331         return sd_bus_reply_method_return(message, NULL);
1332 }
1333
1334 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1335         Manager *m = userdata;
1336         int interactive, r;
1337
1338         assert(message);
1339         assert(m);
1340
1341         r = sd_bus_message_read(message, "b", &interactive);
1342         if (r < 0)
1343                 return r;
1344
1345         r = bus_verify_polkit_async(
1346                         message,
1347                         CAP_SYS_ADMIN,
1348                         "org.freedesktop.login1.flush-devices",
1349                         NULL,
1350                         interactive,
1351                         UID_INVALID,
1352                         &m->polkit_registry,
1353                         error);
1354         if (r < 0)
1355                 return r;
1356         if (r == 0)
1357                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1358
1359         r = flush_devices(m);
1360         if (r < 0)
1361                 return r;
1362
1363         return sd_bus_reply_method_return(message, NULL);
1364 }
1365
1366 static int have_multiple_sessions(
1367                 Manager *m,
1368                 uid_t uid) {
1369
1370         Session *session;
1371         Iterator i;
1372
1373         assert(m);
1374
1375         /* Check for other users' sessions. Greeter sessions do not
1376          * count, and non-login sessions do not count either. */
1377         HASHMAP_FOREACH(session, m->sessions, i)
1378                 if (session->class == SESSION_USER &&
1379                     session->user->uid != uid)
1380                         return true;
1381
1382         return false;
1383 }
1384
1385 static int bus_manager_log_shutdown(
1386                 Manager *m,
1387                 const char *unit_name) {
1388
1389         const char *p, *q;
1390
1391         assert(m);
1392         assert(unit_name);
1393
1394         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1395                 p = "MESSAGE=System is powering down";
1396                 q = "SHUTDOWN=power-off";
1397         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1398                 p = "MESSAGE=System is rebooting";
1399                 q = "SHUTDOWN=reboot";
1400         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1401                 p = "MESSAGE=System is halting";
1402                 q = "SHUTDOWN=halt";
1403         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1404                 p = "MESSAGE=System is rebooting with kexec";
1405                 q = "SHUTDOWN=kexec";
1406         } else {
1407                 p = "MESSAGE=System is shutting down";
1408                 q = NULL;
1409         }
1410
1411         if (isempty(m->wall_message))
1412                 p = strjoina(p, ".");
1413         else
1414                 p = strjoina(p, " (", m->wall_message, ").");
1415
1416         return log_struct(LOG_NOTICE,
1417                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1418                           p,
1419                           q);
1420 }
1421
1422 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1423         Manager *m = userdata;
1424
1425         assert(e);
1426         assert(m);
1427
1428         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1429         return 0;
1430 }
1431
1432 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1433         int r;
1434
1435         assert(m);
1436
1437         if (until <= now(CLOCK_MONOTONIC))
1438                 return 0;
1439
1440         /* We want to ignore the lid switch for a while after each
1441          * suspend, and after boot-up. Hence let's install a timer for
1442          * this. As long as the event source exists we ignore the lid
1443          * switch. */
1444
1445         if (m->lid_switch_ignore_event_source) {
1446                 usec_t u;
1447
1448                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1449                 if (r < 0)
1450                         return r;
1451
1452                 if (until <= u)
1453                         return 0;
1454
1455                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1456         } else
1457                 r = sd_event_add_time(
1458                                 m->event,
1459                                 &m->lid_switch_ignore_event_source,
1460                                 CLOCK_MONOTONIC,
1461                                 until, 0,
1462                                 lid_switch_ignore_handler, m);
1463
1464         return r;
1465 }
1466
1467 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1468
1469         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1470                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1471                 [INHIBIT_SLEEP] = "PrepareForSleep"
1472         };
1473
1474         int active = _active;
1475
1476         assert(m);
1477         assert(w >= 0);
1478         assert(w < _INHIBIT_WHAT_MAX);
1479         assert(signal_name[w]);
1480
1481         return sd_bus_emit_signal(m->bus,
1482                                   "/org/freedesktop/login1",
1483                                   "org.freedesktop.login1.Manager",
1484                                   signal_name[w],
1485                                   "b",
1486                                   active);
1487 }
1488
1489 static int execute_shutdown_or_sleep(
1490                 Manager *m,
1491                 InhibitWhat w,
1492                 const char *unit_name,
1493                 sd_bus_error *error) {
1494
1495         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1496         char *c = NULL;
1497         const char *p;
1498         int r;
1499
1500         assert(m);
1501         assert(w > 0);
1502         assert(w < _INHIBIT_WHAT_MAX);
1503         assert(unit_name);
1504
1505         if (w == INHIBIT_SHUTDOWN)
1506                 bus_manager_log_shutdown(m, unit_name);
1507
1508         r = sd_bus_call_method(
1509                         m->bus,
1510                         "org.freedesktop.systemd1",
1511                         "/org/freedesktop/systemd1",
1512                         "org.freedesktop.systemd1.Manager",
1513                         "StartUnit",
1514                         error,
1515                         &reply,
1516                         "ss", unit_name, "replace-irreversibly");
1517         if (r < 0)
1518                 goto error;
1519
1520         r = sd_bus_message_read(reply, "o", &p);
1521         if (r < 0)
1522                 goto error;
1523
1524         c = strdup(p);
1525         if (!c) {
1526                 r = -ENOMEM;
1527                 goto error;
1528         }
1529
1530         m->action_unit = unit_name;
1531         free(m->action_job);
1532         m->action_job = c;
1533         m->action_what = w;
1534
1535         /* Make sure the lid switch is ignored for a while */
1536         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1537
1538         return 0;
1539
1540 error:
1541         /* Tell people that they now may take a lock again */
1542         (void) send_prepare_for(m, w, false);
1543
1544         return r;
1545 }
1546
1547 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1548
1549         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1550         Inhibitor *offending = NULL;
1551         int r;
1552
1553         assert(manager);
1554
1555         if (manager->action_what == 0 || manager->action_job)
1556                 return 0;
1557
1558         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1559                 _cleanup_free_ char *comm = NULL, *u = NULL;
1560
1561                 if (!timeout)
1562                         return 0;
1563
1564                 (void) get_process_comm(offending->pid, &comm);
1565                 u = uid_to_name(offending->uid);
1566
1567                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1568                            offending->uid, strna(u),
1569                            offending->pid, strna(comm));
1570         }
1571
1572         /* Actually do the operation */
1573         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1574         if (r < 0) {
1575                 log_warning("Error during inhibitor-delayed operation (already returned success to client): %s",
1576                             bus_error_message(&error, r));
1577
1578                 manager->action_unit = NULL;
1579                 manager->action_what = 0;
1580                 return r;
1581         }
1582
1583         return 1;
1584 }
1585
1586 static int manager_inhibit_timeout_handler(
1587                         sd_event_source *s,
1588                         uint64_t usec,
1589                         void *userdata) {
1590
1591         Manager *manager = userdata;
1592         int r;
1593
1594         assert(manager);
1595         assert(manager->inhibit_timeout_source == s);
1596
1597         r = manager_dispatch_delayed(manager, true);
1598         return (r < 0) ? r : 0;
1599 }
1600
1601 static int delay_shutdown_or_sleep(
1602                 Manager *m,
1603                 InhibitWhat w,
1604                 const char *unit_name) {
1605
1606         int r;
1607         usec_t timeout_val;
1608
1609         assert(m);
1610         assert(w >= 0);
1611         assert(w < _INHIBIT_WHAT_MAX);
1612         assert(unit_name);
1613
1614         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1615
1616         if (m->inhibit_timeout_source) {
1617                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1618                 if (r < 0)
1619                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1620
1621                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1622                 if (r < 0)
1623                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1624         } else {
1625                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1626                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1627                 if (r < 0)
1628                         return r;
1629         }
1630
1631         m->action_unit = unit_name;
1632         m->action_what = w;
1633
1634         return 0;
1635 }
1636
1637 int bus_manager_shutdown_or_sleep_now_or_later(
1638                 Manager *m,
1639                 const char *unit_name,
1640                 InhibitWhat w,
1641                 sd_bus_error *error) {
1642
1643         _cleanup_free_ char *load_state = NULL;
1644         bool delayed;
1645         int r;
1646
1647         assert(m);
1648         assert(unit_name);
1649         assert(w > 0);
1650         assert(w <= _INHIBIT_WHAT_MAX);
1651         assert(!m->action_job);
1652
1653         r = unit_load_state(m->bus, unit_name, &load_state);
1654         if (r < 0)
1655                 return r;
1656
1657         if (!streq(load_state, "loaded")) {
1658                 log_notice("Unit %s is %s, refusing operation.", unit_name, load_state);
1659                 return -EACCES;
1660         }
1661
1662         /* Tell everybody to prepare for shutdown/sleep */
1663         (void) send_prepare_for(m, w, true);
1664
1665         delayed =
1666                 m->inhibit_delay_max > 0 &&
1667                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1668
1669         if (delayed)
1670                 /* Shutdown is delayed, keep in mind what we
1671                  * want to do, and start a timeout */
1672                 r = delay_shutdown_or_sleep(m, w, unit_name);
1673         else
1674                 /* Shutdown is not delayed, execute it
1675                  * immediately */
1676                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1677
1678         return r;
1679 }
1680
1681 static int verify_shutdown_creds(
1682                 Manager *m,
1683                 sd_bus_message *message,
1684                 InhibitWhat w,
1685                 bool interactive,
1686                 const char *action,
1687                 const char *action_multiple_sessions,
1688                 const char *action_ignore_inhibit,
1689                 sd_bus_error *error) {
1690
1691         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1692         bool multiple_sessions, blocked;
1693         uid_t uid;
1694         int r;
1695
1696         assert(m);
1697         assert(message);
1698         assert(w >= 0);
1699         assert(w <= _INHIBIT_WHAT_MAX);
1700
1701         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1702         if (r < 0)
1703                 return r;
1704
1705         r = sd_bus_creds_get_euid(creds, &uid);
1706         if (r < 0)
1707                 return r;
1708
1709         r = have_multiple_sessions(m, uid);
1710         if (r < 0)
1711                 return r;
1712
1713         multiple_sessions = r > 0;
1714         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1715
1716         if (multiple_sessions && action_multiple_sessions) {
1717                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1718                 if (r < 0)
1719                         return r;
1720                 if (r == 0)
1721                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1722         }
1723
1724         if (blocked && action_ignore_inhibit) {
1725                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1726                 if (r < 0)
1727                         return r;
1728                 if (r == 0)
1729                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1730         }
1731
1732         if (!multiple_sessions && !blocked && action) {
1733                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1734                 if (r < 0)
1735                         return r;
1736                 if (r == 0)
1737                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1738         }
1739
1740         return 0;
1741 }
1742
1743 static int method_do_shutdown_or_sleep(
1744                 Manager *m,
1745                 sd_bus_message *message,
1746                 const char *unit_name,
1747                 InhibitWhat w,
1748                 const char *action,
1749                 const char *action_multiple_sessions,
1750                 const char *action_ignore_inhibit,
1751                 const char *sleep_verb,
1752                 sd_bus_error *error) {
1753
1754         int interactive, r;
1755
1756         assert(m);
1757         assert(message);
1758         assert(unit_name);
1759         assert(w >= 0);
1760         assert(w <= _INHIBIT_WHAT_MAX);
1761
1762         r = sd_bus_message_read(message, "b", &interactive);
1763         if (r < 0)
1764                 return r;
1765
1766         /* Don't allow multiple jobs being executed at the same time */
1767         if (m->action_what)
1768                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1769
1770         if (sleep_verb) {
1771                 r = can_sleep(sleep_verb);
1772                 if (r == -ENOSPC)
1773                         return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1774                                                 "Not enough swap space for hibernation");
1775                 if (r == 0)
1776                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
1777                                                  "Sleep verb \"%s\" not supported", sleep_verb);
1778                 if (r < 0)
1779                         return r;
1780         }
1781
1782         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1783                                   action_ignore_inhibit, error);
1784         if (r != 0)
1785                 return r;
1786
1787         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1788         if (r < 0)
1789                 return r;
1790
1791         return sd_bus_reply_method_return(message, NULL);
1792 }
1793
1794 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1795         Manager *m = userdata;
1796
1797         return method_do_shutdown_or_sleep(
1798                         m, message,
1799                         SPECIAL_POWEROFF_TARGET,
1800                         INHIBIT_SHUTDOWN,
1801                         "org.freedesktop.login1.power-off",
1802                         "org.freedesktop.login1.power-off-multiple-sessions",
1803                         "org.freedesktop.login1.power-off-ignore-inhibit",
1804                         NULL,
1805                         error);
1806 }
1807
1808 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1809         Manager *m = userdata;
1810
1811         return method_do_shutdown_or_sleep(
1812                         m, message,
1813                         SPECIAL_REBOOT_TARGET,
1814                         INHIBIT_SHUTDOWN,
1815                         "org.freedesktop.login1.reboot",
1816                         "org.freedesktop.login1.reboot-multiple-sessions",
1817                         "org.freedesktop.login1.reboot-ignore-inhibit",
1818                         NULL,
1819                         error);
1820 }
1821
1822 static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1823         Manager *m = userdata;
1824
1825         return method_do_shutdown_or_sleep(
1826                         m, message,
1827                         SPECIAL_HALT_TARGET,
1828                         INHIBIT_SHUTDOWN,
1829                         "org.freedesktop.login1.halt",
1830                         "org.freedesktop.login1.halt-multiple-sessions",
1831                         "org.freedesktop.login1.halt-ignore-inhibit",
1832                         NULL,
1833                         error);
1834 }
1835
1836 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1837         Manager *m = userdata;
1838
1839         return method_do_shutdown_or_sleep(
1840                         m, message,
1841                         SPECIAL_SUSPEND_TARGET,
1842                         INHIBIT_SLEEP,
1843                         "org.freedesktop.login1.suspend",
1844                         "org.freedesktop.login1.suspend-multiple-sessions",
1845                         "org.freedesktop.login1.suspend-ignore-inhibit",
1846                         "suspend",
1847                         error);
1848 }
1849
1850 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1851         Manager *m = userdata;
1852
1853         return method_do_shutdown_or_sleep(
1854                         m, message,
1855                         SPECIAL_HIBERNATE_TARGET,
1856                         INHIBIT_SLEEP,
1857                         "org.freedesktop.login1.hibernate",
1858                         "org.freedesktop.login1.hibernate-multiple-sessions",
1859                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1860                         "hibernate",
1861                         error);
1862 }
1863
1864 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1865         Manager *m = userdata;
1866
1867         return method_do_shutdown_or_sleep(
1868                         m, message,
1869                         SPECIAL_HYBRID_SLEEP_TARGET,
1870                         INHIBIT_SLEEP,
1871                         "org.freedesktop.login1.hibernate",
1872                         "org.freedesktop.login1.hibernate-multiple-sessions",
1873                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1874                         "hybrid-sleep",
1875                         error);
1876 }
1877
1878 static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1879         Manager *m = userdata;
1880
1881         return method_do_shutdown_or_sleep(
1882                         m, message,
1883                         SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
1884                         INHIBIT_SLEEP,
1885                         "org.freedesktop.login1.hibernate",
1886                         "org.freedesktop.login1.hibernate-multiple-sessions",
1887                         "org.freedesktop.login1.hibernate-ignore-inhibit",
1888                         "hybrid-sleep",
1889                         error);
1890 }
1891
1892 static int nologin_timeout_handler(
1893                         sd_event_source *s,
1894                         uint64_t usec,
1895                         void *userdata) {
1896
1897         Manager *m = userdata;
1898
1899         log_info("Creating /run/nologin, blocking further logins...");
1900
1901         m->unlink_nologin =
1902                 create_shutdown_run_nologin_or_warn() >= 0;
1903
1904         return 0;
1905 }
1906
1907 static int update_schedule_file(Manager *m) {
1908         _cleanup_free_ char *temp_path = NULL;
1909         _cleanup_fclose_ FILE *f = NULL;
1910         int r;
1911
1912         assert(m);
1913
1914         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0, MKDIR_WARN_MODE);
1915         if (r < 0)
1916                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1917
1918         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1919         if (r < 0)
1920                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1921
1922         (void) fchmod(fileno(f), 0644);
1923
1924         fprintf(f,
1925                 "USEC="USEC_FMT"\n"
1926                 "WARN_WALL=%i\n"
1927                 "MODE=%s\n",
1928                 m->scheduled_shutdown_timeout,
1929                 m->enable_wall_messages,
1930                 m->scheduled_shutdown_type);
1931
1932         if (!isempty(m->wall_message)) {
1933                 _cleanup_free_ char *t;
1934
1935                 t = cescape(m->wall_message);
1936                 if (!t) {
1937                         r = -ENOMEM;
1938                         goto fail;
1939                 }
1940
1941                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1942         }
1943
1944         r = fflush_and_check(f);
1945         if (r < 0)
1946                 goto fail;
1947
1948         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1949                 r = -errno;
1950                 goto fail;
1951         }
1952
1953         return 0;
1954
1955 fail:
1956         (void) unlink(temp_path);
1957         (void) unlink("/run/systemd/shutdown/scheduled");
1958
1959         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
1960 }
1961
1962 static void reset_scheduled_shutdown(Manager *m) {
1963         assert(m);
1964
1965         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1966         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1967         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1968
1969         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1970         m->scheduled_shutdown_timeout = 0;
1971         m->shutdown_dry_run = false;
1972
1973         if (m->unlink_nologin) {
1974                 (void) unlink_or_warn("/run/nologin");
1975                 m->unlink_nologin = false;
1976         }
1977
1978         (void) unlink("/run/systemd/shutdown/scheduled");
1979 }
1980
1981 static int manager_scheduled_shutdown_handler(
1982                         sd_event_source *s,
1983                         uint64_t usec,
1984                         void *userdata) {
1985
1986         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1987         Manager *m = userdata;
1988         const char *target;
1989         int r;
1990
1991         assert(m);
1992
1993         if (isempty(m->scheduled_shutdown_type))
1994                 return 0;
1995
1996         if (streq(m->scheduled_shutdown_type, "poweroff"))
1997                 target = SPECIAL_POWEROFF_TARGET;
1998         else if (streq(m->scheduled_shutdown_type, "reboot"))
1999                 target = SPECIAL_REBOOT_TARGET;
2000         else if (streq(m->scheduled_shutdown_type, "halt"))
2001                 target = SPECIAL_HALT_TARGET;
2002         else
2003                 assert_not_reached("unexpected shutdown type");
2004
2005         /* Don't allow multiple jobs being executed at the same time */
2006         if (m->action_what) {
2007                 r = -EALREADY;
2008                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
2009                 goto error;
2010         }
2011
2012         if (m->shutdown_dry_run) {
2013                 /* We do not process delay inhibitors here.  Otherwise, we
2014                  * would have to be considered "in progress" (like the check
2015                  * above) for some seconds after our admin has seen the final
2016                  * wall message. */
2017
2018                 bus_manager_log_shutdown(m, target);
2019                 log_info("Running in dry run, suppressing action.");
2020                 reset_scheduled_shutdown(m);
2021
2022                 return 0;
2023         }
2024
2025         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2026         if (r < 0) {
2027                 log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2028                 goto error;
2029         }
2030
2031         return 0;
2032
2033 error:
2034         reset_scheduled_shutdown(m);
2035         return r;
2036 }
2037
2038 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2039         Manager *m = userdata;
2040         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2041         const char *action_multiple_sessions = NULL;
2042         const char *action_ignore_inhibit = NULL;
2043         const char *action = NULL;
2044         uint64_t elapse;
2045         char *type;
2046         int r;
2047         bool dry_run = false;
2048
2049         assert(m);
2050         assert(message);
2051
2052         r = sd_bus_message_read(message, "st", &type, &elapse);
2053         if (r < 0)
2054                 return r;
2055
2056         if (startswith(type, "dry-")) {
2057                 type += 4;
2058                 dry_run = true;
2059         }
2060
2061         if (streq(type, "poweroff")) {
2062                 action = "org.freedesktop.login1.power-off";
2063                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2064                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2065         } else if (streq(type, "reboot")) {
2066                 action = "org.freedesktop.login1.reboot";
2067                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2068                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2069         } else if (streq(type, "halt")) {
2070                 action = "org.freedesktop.login1.halt";
2071                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2072                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2073         } else
2074                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2075
2076         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2077                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2078         if (r != 0)
2079                 return r;
2080
2081         if (m->scheduled_shutdown_timeout_source) {
2082                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2083                 if (r < 0)
2084                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2085
2086                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2087                 if (r < 0)
2088                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2089         } else {
2090                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2091                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2092                 if (r < 0)
2093                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2094         }
2095
2096         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2097         if (r < 0) {
2098                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2099                 return log_oom();
2100         }
2101
2102         m->shutdown_dry_run = dry_run;
2103
2104         if (m->nologin_timeout_source) {
2105                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2106                 if (r < 0)
2107                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2108
2109                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2110                 if (r < 0)
2111                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2112         } else {
2113                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2114                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2115                 if (r < 0)
2116                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2117         }
2118
2119         m->scheduled_shutdown_timeout = elapse;
2120
2121         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2122         if (r >= 0) {
2123                 const char *tty = NULL;
2124
2125                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2126                 (void) sd_bus_creds_get_tty(creds, &tty);
2127
2128                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2129                 if (r < 0) {
2130                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2131                         return log_oom();
2132                 }
2133         }
2134
2135         r = manager_setup_wall_message_timer(m);
2136         if (r < 0)
2137                 return r;
2138
2139         r = update_schedule_file(m);
2140         if (r < 0)
2141                 return r;
2142
2143         return sd_bus_reply_method_return(message, NULL);
2144 }
2145
2146 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2147         Manager *m = userdata;
2148         bool cancelled;
2149
2150         assert(m);
2151         assert(message);
2152
2153         cancelled = m->scheduled_shutdown_type != NULL;
2154         reset_scheduled_shutdown(m);
2155
2156         if (cancelled && m->enable_wall_messages) {
2157                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2158                 const char *tty = NULL;
2159                 uid_t uid = 0;
2160                 int r;
2161
2162                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2163                 if (r >= 0) {
2164                         (void) sd_bus_creds_get_uid(creds, &uid);
2165                         (void) sd_bus_creds_get_tty(creds, &tty);
2166                 }
2167
2168                 utmp_wall("The system shutdown has been cancelled",
2169                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2170         }
2171
2172         return sd_bus_reply_method_return(message, "b", cancelled);
2173 }
2174
2175 static int method_can_shutdown_or_sleep(
2176                 Manager *m,
2177                 sd_bus_message *message,
2178                 InhibitWhat w,
2179                 const char *action,
2180                 const char *action_multiple_sessions,
2181                 const char *action_ignore_inhibit,
2182                 const char *sleep_verb,
2183                 sd_bus_error *error) {
2184
2185         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2186         HandleAction handle;
2187         bool multiple_sessions, challenge, blocked;
2188         const char *result = NULL;
2189         uid_t uid;
2190         int r;
2191
2192         assert(m);
2193         assert(message);
2194         assert(w >= 0);
2195         assert(w <= _INHIBIT_WHAT_MAX);
2196         assert(action);
2197         assert(action_multiple_sessions);
2198         assert(action_ignore_inhibit);
2199
2200         if (sleep_verb) {
2201                 r = can_sleep(sleep_verb);
2202                 if (IN_SET(r,  0, -ENOSPC))
2203                         return sd_bus_reply_method_return(message, "s", "na");
2204                 if (r < 0)
2205                         return r;
2206         }
2207
2208         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2209         if (r < 0)
2210                 return r;
2211
2212         r = sd_bus_creds_get_euid(creds, &uid);
2213         if (r < 0)
2214                 return r;
2215
2216         r = have_multiple_sessions(m, uid);
2217         if (r < 0)
2218                 return r;
2219
2220         multiple_sessions = r > 0;
2221         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2222
2223         handle = handle_action_from_string(sleep_verb);
2224         if (handle >= 0) {
2225                 const char *target;
2226
2227                 target = manager_target_for_action(handle);
2228                 if (target) {
2229                         _cleanup_free_ char *load_state = NULL;
2230
2231                         r = unit_load_state(m->bus, target, &load_state);
2232                         if (r < 0)
2233                                 return r;
2234
2235                         if (!streq(load_state, "loaded")) {
2236                                 result = "no";
2237                                 goto finish;
2238                         }
2239                 }
2240         }
2241
2242         if (multiple_sessions) {
2243                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2244                 if (r < 0)
2245                         return r;
2246
2247                 if (r > 0)
2248                         result = "yes";
2249                 else if (challenge)
2250                         result = "challenge";
2251                 else
2252                         result = "no";
2253         }
2254
2255         if (blocked) {
2256                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2257                 if (r < 0)
2258                         return r;
2259
2260                 if (r > 0 && !result)
2261                         result = "yes";
2262                 else if (challenge && (!result || streq(result, "yes")))
2263                         result = "challenge";
2264                 else
2265                         result = "no";
2266         }
2267
2268         if (!multiple_sessions && !blocked) {
2269                 /* If neither inhibit nor multiple sessions
2270                  * apply then just check the normal policy */
2271
2272                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2273                 if (r < 0)
2274                         return r;
2275
2276                 if (r > 0)
2277                         result = "yes";
2278                 else if (challenge)
2279                         result = "challenge";
2280                 else
2281                         result = "no";
2282         }
2283
2284  finish:
2285         return sd_bus_reply_method_return(message, "s", result);
2286 }
2287
2288 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2289         Manager *m = userdata;
2290
2291         return method_can_shutdown_or_sleep(
2292                         m, message,
2293                         INHIBIT_SHUTDOWN,
2294                         "org.freedesktop.login1.power-off",
2295                         "org.freedesktop.login1.power-off-multiple-sessions",
2296                         "org.freedesktop.login1.power-off-ignore-inhibit",
2297                         NULL,
2298                         error);
2299 }
2300
2301 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2302         Manager *m = userdata;
2303
2304         return method_can_shutdown_or_sleep(
2305                         m, message,
2306                         INHIBIT_SHUTDOWN,
2307                         "org.freedesktop.login1.reboot",
2308                         "org.freedesktop.login1.reboot-multiple-sessions",
2309                         "org.freedesktop.login1.reboot-ignore-inhibit",
2310                         NULL,
2311                         error);
2312 }
2313
2314 static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2315         Manager *m = userdata;
2316
2317         return method_can_shutdown_or_sleep(
2318                         m, message,
2319                         INHIBIT_SHUTDOWN,
2320                         "org.freedesktop.login1.halt",
2321                         "org.freedesktop.login1.halt-multiple-sessions",
2322                         "org.freedesktop.login1.halt-ignore-inhibit",
2323                         NULL,
2324                         error);
2325 }
2326
2327 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2328         Manager *m = userdata;
2329
2330         return method_can_shutdown_or_sleep(
2331                         m, message,
2332                         INHIBIT_SLEEP,
2333                         "org.freedesktop.login1.suspend",
2334                         "org.freedesktop.login1.suspend-multiple-sessions",
2335                         "org.freedesktop.login1.suspend-ignore-inhibit",
2336                         "suspend",
2337                         error);
2338 }
2339
2340 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2341         Manager *m = userdata;
2342
2343         return method_can_shutdown_or_sleep(
2344                         m, message,
2345                         INHIBIT_SLEEP,
2346                         "org.freedesktop.login1.hibernate",
2347                         "org.freedesktop.login1.hibernate-multiple-sessions",
2348                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2349                         "hibernate",
2350                         error);
2351 }
2352
2353 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2354         Manager *m = userdata;
2355
2356         return method_can_shutdown_or_sleep(
2357                         m, message,
2358                         INHIBIT_SLEEP,
2359                         "org.freedesktop.login1.hibernate",
2360                         "org.freedesktop.login1.hibernate-multiple-sessions",
2361                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2362                         "hybrid-sleep",
2363                         error);
2364 }
2365
2366 static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2367         Manager *m = userdata;
2368
2369         return method_can_shutdown_or_sleep(
2370                         m, message,
2371                         INHIBIT_SLEEP,
2372                         "org.freedesktop.login1.hibernate",
2373                         "org.freedesktop.login1.hibernate-multiple-sessions",
2374                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2375                         "suspend-then-hibernate",
2376                         error);
2377 }
2378
2379 static int property_get_reboot_to_firmware_setup(
2380                 sd_bus *bus,
2381                 const char *path,
2382                 const char *interface,
2383                 const char *property,
2384                 sd_bus_message *reply,
2385                 void *userdata,
2386                 sd_bus_error *error) {
2387         int r;
2388
2389         assert(bus);
2390         assert(reply);
2391         assert(userdata);
2392
2393         r = efi_get_reboot_to_firmware();
2394         if (r < 0 && r != -EOPNOTSUPP)
2395                 log_warning_errno(r, "Failed to determine reboot-to-firmware state: %m");
2396
2397         return sd_bus_message_append(reply, "b", r > 0);
2398 }
2399
2400 static int method_set_reboot_to_firmware_setup(
2401                 sd_bus_message *message,
2402                 void *userdata,
2403                 sd_bus_error *error) {
2404
2405         int b, r;
2406         Manager *m = userdata;
2407
2408         assert(message);
2409         assert(m);
2410
2411         r = sd_bus_message_read(message, "b", &b);
2412         if (r < 0)
2413                 return r;
2414
2415         r = bus_verify_polkit_async(message,
2416                                     CAP_SYS_ADMIN,
2417                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2418                                     NULL,
2419                                     false,
2420                                     UID_INVALID,
2421                                     &m->polkit_registry,
2422                                     error);
2423         if (r < 0)
2424                 return r;
2425         if (r == 0)
2426                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2427
2428         r = efi_set_reboot_to_firmware(b);
2429         if (r < 0)
2430                 return r;
2431
2432         return sd_bus_reply_method_return(message, NULL);
2433 }
2434
2435 static int method_can_reboot_to_firmware_setup(
2436                 sd_bus_message *message,
2437                 void *userdata,
2438                 sd_bus_error *error) {
2439
2440         int r;
2441         bool challenge;
2442         const char *result;
2443         Manager *m = userdata;
2444
2445         assert(message);
2446         assert(m);
2447
2448         r = efi_reboot_to_firmware_supported();
2449         if (r < 0) {
2450                 if (r != -EOPNOTSUPP)
2451                         log_warning_errno(errno, "Failed to determine whether reboot to firmware is supported: %m");
2452
2453                 return sd_bus_reply_method_return(message, "s", "na");
2454         }
2455
2456         r = bus_test_polkit(message,
2457                             CAP_SYS_ADMIN,
2458                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2459                             NULL,
2460                             UID_INVALID,
2461                             &challenge,
2462                             error);
2463         if (r < 0)
2464                 return r;
2465
2466         if (r > 0)
2467                 result = "yes";
2468         else if (challenge)
2469                 result = "challenge";
2470         else
2471                 result = "no";
2472
2473         return sd_bus_reply_method_return(message, "s", result);
2474 }
2475
2476 static int method_set_wall_message(
2477                 sd_bus_message *message,
2478                 void *userdata,
2479                 sd_bus_error *error) {
2480
2481         int r;
2482         Manager *m = userdata;
2483         char *wall_message;
2484         unsigned enable_wall_messages;
2485
2486         assert(message);
2487         assert(m);
2488
2489         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2490         if (r < 0)
2491                 return r;
2492
2493         r = bus_verify_polkit_async(message,
2494                                     CAP_SYS_ADMIN,
2495                                     "org.freedesktop.login1.set-wall-message",
2496                                     NULL,
2497                                     false,
2498                                     UID_INVALID,
2499                                     &m->polkit_registry,
2500                                     error);
2501         if (r < 0)
2502                 return r;
2503         if (r == 0)
2504                 return 1; /* Will call us back */
2505
2506         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2507         if (r < 0)
2508                 return log_oom();
2509
2510         m->enable_wall_messages = enable_wall_messages;
2511
2512         return sd_bus_reply_method_return(message, NULL);
2513 }
2514
2515 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2516         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2517         const char *who, *why, *what, *mode;
2518         _cleanup_free_ char *id = NULL;
2519         _cleanup_close_ int fifo_fd = -1;
2520         Manager *m = userdata;
2521         Inhibitor *i = NULL;
2522         InhibitMode mm;
2523         InhibitWhat w;
2524         pid_t pid;
2525         uid_t uid;
2526         int r;
2527
2528         assert(message);
2529         assert(m);
2530
2531         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2532         if (r < 0)
2533                 return r;
2534
2535         w = inhibit_what_from_string(what);
2536         if (w <= 0)
2537                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2538
2539         mm = inhibit_mode_from_string(mode);
2540         if (mm < 0)
2541                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2542
2543         /* Delay is only supported for shutdown/sleep */
2544         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2545                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2546
2547         /* Don't allow taking delay locks while we are already
2548          * executing the operation. We shouldn't create the impression
2549          * that the lock was successful if the machine is about to go
2550          * down/suspend any moment. */
2551         if (m->action_what & w)
2552                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2553
2554         r = bus_verify_polkit_async(
2555                         message,
2556                         CAP_SYS_BOOT,
2557                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2558                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2559                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2560                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2561                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2562                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2563                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2564                         NULL,
2565                         false,
2566                         UID_INVALID,
2567                         &m->polkit_registry,
2568                         error);
2569         if (r < 0)
2570                 return r;
2571         if (r == 0)
2572                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2573
2574         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2575         if (r < 0)
2576                 return r;
2577
2578         r = sd_bus_creds_get_euid(creds, &uid);
2579         if (r < 0)
2580                 return r;
2581
2582         r = sd_bus_creds_get_pid(creds, &pid);
2583         if (r < 0)
2584                 return r;
2585
2586         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2587                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2588
2589         do {
2590                 id = mfree(id);
2591
2592                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2593                         return -ENOMEM;
2594
2595         } while (hashmap_get(m->inhibitors, id));
2596
2597         r = manager_add_inhibitor(m, id, &i);
2598         if (r < 0)
2599                 return r;
2600
2601         i->what = w;
2602         i->mode = mm;
2603         i->pid = pid;
2604         i->uid = uid;
2605         i->why = strdup(why);
2606         i->who = strdup(who);
2607
2608         if (!i->why || !i->who) {
2609                 r = -ENOMEM;
2610                 goto fail;
2611         }
2612
2613         fifo_fd = inhibitor_create_fifo(i);
2614         if (fifo_fd < 0) {
2615                 r = fifo_fd;
2616                 goto fail;
2617         }
2618
2619         inhibitor_start(i);
2620
2621         return sd_bus_reply_method_return(message, "h", fifo_fd);
2622
2623 fail:
2624         if (i)
2625                 inhibitor_free(i);
2626
2627         return r;
2628 }
2629
2630 const sd_bus_vtable manager_vtable[] = {
2631         SD_BUS_VTABLE_START(0),
2632
2633         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2634         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2635
2636         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2637         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2638         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2639         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2640         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2641         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2642         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2643         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2644         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2645         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2646         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2647         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2648         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2649         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2650         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2651         SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST),
2652         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2653         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2654         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2655         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2656         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2657         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2658         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2659         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2660         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2661         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2662         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2663         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0),
2664         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2665         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0),
2666         SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
2667
2668         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2669         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2670         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2671         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2672         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2673         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2674         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2675         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2676         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2677         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2678         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2679         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2680         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2681         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2682         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2683         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2684         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2685         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2689         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2690         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2691         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2692         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2693         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2694         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2695         SD_BUS_METHOD("Halt", "b", NULL, method_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2696         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2697         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2698         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2699         SD_BUS_METHOD("SuspendThenHibernate", "b", NULL, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2700         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2701         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2702         SD_BUS_METHOD("CanHalt", NULL, "s", method_can_halt, SD_BUS_VTABLE_UNPRIVILEGED),
2703         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2704         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2705         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2706         SD_BUS_METHOD("CanSuspendThenHibernate", NULL, "s", method_can_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2707         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2708         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2709         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2710         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2711         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2712         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2713
2714         SD_BUS_SIGNAL("SessionNew", "so", 0),
2715         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2716         SD_BUS_SIGNAL("UserNew", "uo", 0),
2717         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2718         SD_BUS_SIGNAL("SeatNew", "so", 0),
2719         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2720         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2721         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2722
2723         SD_BUS_VTABLE_END
2724 };
2725
2726 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2727         int r = 0;
2728
2729         assert(s);
2730         assert(unit);
2731
2732         if (!s->started)
2733                 return r;
2734
2735         if (streq(result, "done"))
2736                 r = session_send_create_reply(s, NULL);
2737         else {
2738                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2739
2740                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2741                 r = session_send_create_reply(s, &e);
2742         }
2743
2744         return r;
2745 }
2746
2747 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2748         const char *path, *result, *unit;
2749         Manager *m = userdata;
2750         Session *session;
2751         uint32_t id;
2752         User *user;
2753         int r;
2754
2755         assert(message);
2756         assert(m);
2757
2758         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2759         if (r < 0) {
2760                 bus_log_parse_error(r);
2761                 return 0;
2762         }
2763
2764         if (m->action_job && streq(m->action_job, path)) {
2765                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2766
2767                 /* Tell people that they now may take a lock again */
2768                 (void) send_prepare_for(m, m->action_what, false);
2769
2770                 m->action_job = mfree(m->action_job);
2771                 m->action_unit = NULL;
2772                 m->action_what = 0;
2773                 return 0;
2774         }
2775
2776         session = hashmap_get(m->session_units, unit);
2777         if (session && streq_ptr(path, session->scope_job)) {
2778                 session->scope_job = mfree(session->scope_job);
2779                 session_jobs_reply(session, unit, result);
2780
2781                 session_save(session);
2782                 user_save(session->user);
2783                 session_add_to_gc_queue(session);
2784         }
2785
2786         user = hashmap_get(m->user_units, unit);
2787         if (user &&
2788             (streq_ptr(path, user->service_job) ||
2789              streq_ptr(path, user->slice_job))) {
2790
2791                 if (streq_ptr(path, user->service_job))
2792                         user->service_job = mfree(user->service_job);
2793
2794                 if (streq_ptr(path, user->slice_job))
2795                         user->slice_job = mfree(user->slice_job);
2796
2797                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2798                         session_jobs_reply(session, unit, result);
2799
2800                 user_save(user);
2801                 user_add_to_gc_queue(user);
2802         }
2803
2804         return 0;
2805 }
2806
2807 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2808         const char *path, *unit;
2809         Manager *m = userdata;
2810         Session *session;
2811         User *user;
2812         int r;
2813
2814         assert(message);
2815         assert(m);
2816
2817         r = sd_bus_message_read(message, "so", &unit, &path);
2818         if (r < 0) {
2819                 bus_log_parse_error(r);
2820                 return 0;
2821         }
2822
2823         session = hashmap_get(m->session_units, unit);
2824         if (session)
2825                 session_add_to_gc_queue(session);
2826
2827         user = hashmap_get(m->user_units, unit);
2828         if (user)
2829                 user_add_to_gc_queue(user);
2830
2831         return 0;
2832 }
2833
2834 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2835         _cleanup_free_ char *unit = NULL;
2836         Manager *m = userdata;
2837         const char *path;
2838         Session *session;
2839         User *user;
2840         int r;
2841
2842         assert(message);
2843         assert(m);
2844
2845         path = sd_bus_message_get_path(message);
2846         if (!path)
2847                 return 0;
2848
2849         r = unit_name_from_dbus_path(path, &unit);
2850         if (r == -EINVAL) /* not a unit */
2851                 return 0;
2852         if (r < 0) {
2853                 log_oom();
2854                 return 0;
2855         }
2856
2857         session = hashmap_get(m->session_units, unit);
2858         if (session)
2859                 session_add_to_gc_queue(session);
2860
2861         user = hashmap_get(m->user_units, unit);
2862         if (user)
2863                 user_add_to_gc_queue(user);
2864
2865         return 0;
2866 }
2867
2868 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2869         Manager *m = userdata;
2870         Session *session;
2871         Iterator i;
2872         int b, r;
2873
2874         assert(message);
2875         assert(m);
2876
2877         r = sd_bus_message_read(message, "b", &b);
2878         if (r < 0) {
2879                 bus_log_parse_error(r);
2880                 return 0;
2881         }
2882
2883         if (b)
2884                 return 0;
2885
2886         /* systemd finished reloading, let's recheck all our sessions */
2887         log_debug("System manager has been reloaded, rechecking sessions...");
2888
2889         HASHMAP_FOREACH(session, m->sessions, i)
2890                 session_add_to_gc_queue(session);
2891
2892         return 0;
2893 }
2894
2895 int manager_send_changed(Manager *manager, const char *property, ...) {
2896         char **l;
2897
2898         assert(manager);
2899
2900         l = strv_from_stdarg_alloca(property);
2901
2902         return sd_bus_emit_properties_changed_strv(
2903                         manager->bus,
2904                         "/org/freedesktop/login1",
2905                         "org.freedesktop.login1.Manager",
2906                         l);
2907 }
2908
2909 static int strdup_job(sd_bus_message *reply, char **job) {
2910         const char *j;
2911         char *copy;
2912         int r;
2913
2914         r = sd_bus_message_read(reply, "o", &j);
2915         if (r < 0)
2916                 return r;
2917
2918         copy = strdup(j);
2919         if (!copy)
2920                 return -ENOMEM;
2921
2922         *job = copy;
2923         return 1;
2924 }
2925
2926 int manager_start_scope(
2927                 Manager *manager,
2928                 const char *scope,
2929                 pid_t pid,
2930                 const char *slice,
2931                 const char *description,
2932                 const char *after,
2933                 const char *after2,
2934                 sd_bus_message *more_properties,
2935                 sd_bus_error *error,
2936                 char **job) {
2937
2938         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2939         int r;
2940
2941         assert(manager);
2942         assert(scope);
2943         assert(pid > 1);
2944         assert(job);
2945
2946         r = sd_bus_message_new_method_call(
2947                         manager->bus,
2948                         &m,
2949                         "org.freedesktop.systemd1",
2950                         "/org/freedesktop/systemd1",
2951                         "org.freedesktop.systemd1.Manager",
2952                         "StartTransientUnit");
2953         if (r < 0)
2954                 return r;
2955
2956         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
2957         if (r < 0)
2958                 return r;
2959
2960         r = sd_bus_message_open_container(m, 'a', "(sv)");
2961         if (r < 0)
2962                 return r;
2963
2964         if (!isempty(slice)) {
2965                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
2966                 if (r < 0)
2967                         return r;
2968         }
2969
2970         if (!isempty(description)) {
2971                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2972                 if (r < 0)
2973                         return r;
2974         }
2975
2976         if (!isempty(after)) {
2977                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2978                 if (r < 0)
2979                         return r;
2980         }
2981
2982         if (!isempty(after2)) {
2983                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2984                 if (r < 0)
2985                         return r;
2986         }
2987
2988         /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore
2989          * SIGTERM */
2990         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
2991         if (r < 0)
2992                 return r;
2993
2994         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
2995         if (r < 0)
2996                 return r;
2997
2998         /* disable TasksMax= for the session scope, rely on the slice setting for it */
2999         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", (uint64_t)-1);
3000         if (r < 0)
3001                 return bus_log_create_error(r);
3002
3003         if (more_properties) {
3004                 /* If TasksMax also appears here, it will overwrite the default value set above */
3005                 r = sd_bus_message_copy(m, more_properties, true);
3006                 if (r < 0)
3007                         return r;
3008         }
3009
3010         r = sd_bus_message_close_container(m);
3011         if (r < 0)
3012                 return r;
3013
3014         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3015         if (r < 0)
3016                 return r;
3017
3018         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3019         if (r < 0)
3020                 return r;
3021
3022         return strdup_job(reply, job);
3023 }
3024
3025 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3026         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3027         int r;
3028
3029         assert(manager);
3030         assert(unit);
3031         assert(job);
3032
3033         r = sd_bus_call_method(
3034                         manager->bus,
3035                         "org.freedesktop.systemd1",
3036                         "/org/freedesktop/systemd1",
3037                         "org.freedesktop.systemd1.Manager",
3038                         "StartUnit",
3039                         error,
3040                         &reply,
3041                         "ss", unit, "replace");
3042         if (r < 0)
3043                 return r;
3044
3045         return strdup_job(reply, job);
3046 }
3047
3048 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3049         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3050         int r;
3051
3052         assert(manager);
3053         assert(unit);
3054         assert(job);
3055
3056         r = sd_bus_call_method(
3057                         manager->bus,
3058                         "org.freedesktop.systemd1",
3059                         "/org/freedesktop/systemd1",
3060                         "org.freedesktop.systemd1.Manager",
3061                         "StopUnit",
3062                         error,
3063                         &reply,
3064                         "ss", unit, "fail");
3065         if (r < 0) {
3066                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3067                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3068
3069                         *job = NULL;
3070                         sd_bus_error_free(error);
3071                         return 0;
3072                 }
3073
3074                 return r;
3075         }
3076
3077         return strdup_job(reply, job);
3078 }
3079
3080 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3081         _cleanup_free_ char *path = NULL;
3082         int r;
3083
3084         assert(manager);
3085         assert(scope);
3086
3087         path = unit_dbus_path_from_name(scope);
3088         if (!path)
3089                 return -ENOMEM;
3090
3091         r = sd_bus_call_method(
3092                         manager->bus,
3093                         "org.freedesktop.systemd1",
3094                         path,
3095                         "org.freedesktop.systemd1.Scope",
3096                         "Abandon",
3097                         error,
3098                         NULL,
3099                         NULL);
3100         if (r < 0) {
3101                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3102                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED) ||
3103                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3104                         sd_bus_error_free(error);
3105                         return 0;
3106                 }
3107
3108                 return r;
3109         }
3110
3111         return 1;
3112 }
3113
3114 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3115         assert(manager);
3116         assert(unit);
3117
3118         return sd_bus_call_method(
3119                         manager->bus,
3120                         "org.freedesktop.systemd1",
3121                         "/org/freedesktop/systemd1",
3122                         "org.freedesktop.systemd1.Manager",
3123                         "KillUnit",
3124                         error,
3125                         NULL,
3126                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3127 }
3128
3129 int manager_unit_is_active(Manager *manager, const char *unit) {
3130         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3131         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3132         _cleanup_free_ char *path = NULL;
3133         const char *state;
3134         int r;
3135
3136         assert(manager);
3137         assert(unit);
3138
3139         path = unit_dbus_path_from_name(unit);
3140         if (!path)
3141                 return -ENOMEM;
3142
3143         r = sd_bus_get_property(
3144                         manager->bus,
3145                         "org.freedesktop.systemd1",
3146                         path,
3147                         "org.freedesktop.systemd1.Unit",
3148                         "ActiveState",
3149                         &error,
3150                         &reply,
3151                         "s");
3152         if (r < 0) {
3153                 /* systemd might have droppped off momentarily, let's
3154                  * not make this an error */
3155                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3156                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3157                         return true;
3158
3159                 /* If the unit is already unloaded then it's not
3160                  * active */
3161                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3162                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3163                         return false;
3164
3165                 return r;
3166         }
3167
3168         r = sd_bus_message_read(reply, "s", &state);
3169         if (r < 0)
3170                 return -EINVAL;
3171
3172         return !streq(state, "inactive") && !streq(state, "failed");
3173 }
3174
3175 int manager_job_is_active(Manager *manager, const char *path) {
3176         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3177         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3178         int r;
3179
3180         assert(manager);
3181         assert(path);
3182
3183         r = sd_bus_get_property(
3184                         manager->bus,
3185                         "org.freedesktop.systemd1",
3186                         path,
3187                         "org.freedesktop.systemd1.Job",
3188                         "State",
3189                         &error,
3190                         &reply,
3191                         "s");
3192         if (r < 0) {
3193                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3194                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3195                         return true;
3196
3197                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3198                         return false;
3199
3200                 return r;
3201         }
3202
3203         /* We don't actually care about the state really. The fact
3204          * that we could read the job state is enough for us */
3205
3206         return true;
3207 }