src/login/logind-dbus.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2011 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <pwd.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include "sd-messages.h"
  26
  27 #include "alloc-util.h"
  28 #include "audit-util.h"
  29 #include "bus-common-errors.h"
  30 #include "bus-error.h"
  31 #include "bus-util.h"
  32 #include "dirent-util.h"
  33 //#include "efivars.h"
  34 #include "escape.h"
  35 #include "fd-util.h"
  36 #include "fileio-label.h"
  37 #include "format-util.h"
  38 #include "fs-util.h"
  39 #include "logind.h"
  40 #include "mkdir.h"
  41 #include "path-util.h"
  42 #include "process-util.h"
  43 #include "selinux-util.h"
  44 #include "sleep-config.h"
  45 //#include "special.h"
  46 #include "strv.h"
  47 #include "terminal-util.h"
  48 #include "udev-util.h"
  49 #include "unit-name.h"
  50 #include "user-util.h"
  51 #include "utmp-wtmp.h"
  52
  53 /// Additional includes needed by elogind
  54 #include "elogind-dbus.h"
  55 //#include "update-utmp.h"
  56
  57 int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
  58         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  59         Session *session;
  60         int r;
  61
  62         assert(m);
  63         assert(message);
  64         assert(ret);
  65
  66         if (isempty(name)) {
  67                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
  68                 if (r < 0)
  69                         return r;
  70
  71                 r = sd_bus_creds_get_session(creds, &name);
  72                 if (r == -ENXIO)
  73                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID,
  74                                                  "Caller does not belong to any known session");
  75                 if (r < 0)
  76                         return r;
  77         }
  78
  79         session = hashmap_get(m->sessions, name);
  80         if (!session)
  81                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
  82
  83         *ret = session;
  84         return 0;
  85 }
  86
  87 int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) {
  88         User *user;
  89         int r;
  90
  91         assert(m);
  92         assert(message);
  93         assert(ret);
  94
  95         if (!uid_is_valid(uid)) {
  96                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
  97
  98                 /* Note that we get the owner UID of the session, not the actual client UID here! */
  99                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
 100                 if (r < 0)
 101                         return r;
 102
 103                 r = sd_bus_creds_get_owner_uid(creds, &uid);
 104                 if (r < 0)
 105                         return r;
 106         }
 107
 108         user = hashmap_get(m->users, UID_TO_PTR(uid));
 109         if (!user)
 110                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "No user "UID_FMT" known or logged in", uid);
 111
 112         *ret = user;
 113         return 0;
 114 }
 115
 116 int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) {
 117         Seat *seat;
 118         int r;
 119
 120         assert(m);
 121         assert(message);
 122         assert(ret);
 123
 124         if (isempty(name)) {
 125                 Session *session;
 126
 127                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 128                 if (r < 0)
 129                         return r;
 130
 131                 seat = session->seat;
 132                 if (!seat)
 133                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
 134         } else {
 135                 seat = hashmap_get(m->seats, name);
 136                 if (!seat)
 137                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name);
 138         }
 139
 140         *ret = seat;
 141         return 0;
 142 }
 143
 144 static int property_get_idle_hint(
 145                 sd_bus *bus,
 146                 const char *path,
 147                 const char *interface,
 148                 const char *property,
 149                 sd_bus_message *reply,
 150                 void *userdata,
 151                 sd_bus_error *error) {
 152
 153         Manager *m = userdata;
 154
 155         assert(bus);
 156         assert(reply);
 157         assert(m);
 158
 159         return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0);
 160 }
 161
 162 static int property_get_idle_since_hint(
 163                 sd_bus *bus,
 164                 const char *path,
 165                 const char *interface,
 166                 const char *property,
 167                 sd_bus_message *reply,
 168                 void *userdata,
 169                 sd_bus_error *error) {
 170
 171         Manager *m = userdata;
 172         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 173
 174         assert(bus);
 175         assert(reply);
 176         assert(m);
 177
 178         manager_get_idle_hint(m, &t);
 179
 180         return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic);
 181 }
 182
 183 static int property_get_inhibited(
 184                 sd_bus *bus,
 185                 const char *path,
 186                 const char *interface,
 187                 const char *property,
 188                 sd_bus_message *reply,
 189                 void *userdata,
 190                 sd_bus_error *error) {
 191
 192         Manager *m = userdata;
 193         InhibitWhat w;
 194
 195         assert(bus);
 196         assert(reply);
 197         assert(m);
 198
 199         w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY);
 200
 201         return sd_bus_message_append(reply, "s", inhibit_what_to_string(w));
 202 }
 203
 204 static int property_get_preparing(
 205                 sd_bus *bus,
 206                 const char *path,
 207                 const char *interface,
 208                 const char *property,
 209                 sd_bus_message *reply,
 210                 void *userdata,
 211                 sd_bus_error *error) {
 212
 213         Manager *m = userdata;
 214         bool b;
 215
 216         assert(bus);
 217         assert(reply);
 218         assert(m);
 219
 220         if (streq(property, "PreparingForShutdown"))
 221                 b = !!(m->action_what & INHIBIT_SHUTDOWN);
 222         else
 223                 b = !!(m->action_what & INHIBIT_SLEEP);
 224
 225         return sd_bus_message_append(reply, "b", b);
 226 }
 227
 228 static int property_get_scheduled_shutdown(
 229                 sd_bus *bus,
 230                 const char *path,
 231                 const char *interface,
 232                 const char *property,
 233                 sd_bus_message *reply,
 234                 void *userdata,
 235                 sd_bus_error *error) {
 236
 237         Manager *m = userdata;
 238         int r;
 239
 240         assert(bus);
 241         assert(reply);
 242         assert(m);
 243
 244         r = sd_bus_message_open_container(reply, 'r', "st");
 245         if (r < 0)
 246                 return r;
 247
 248         r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_type, m->scheduled_shutdown_timeout);
 249         if (r < 0)
 250                 return r;
 251
 252         return sd_bus_message_close_container(reply);
 253 }
 254
 255 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction);
 256
 257 static int property_get_docked(
 258                 sd_bus *bus,
 259                 const char *path,
 260                 const char *interface,
 261                 const char *property,
 262                 sd_bus_message *reply,
 263                 void *userdata,
 264                 sd_bus_error *error) {
 265
 266         Manager *m = userdata;
 267
 268         assert(bus);
 269         assert(reply);
 270         assert(m);
 271
 272         return sd_bus_message_append(reply, "b", manager_is_docked_or_external_displays(m));
 273 }
 274
 275 static int property_get_current_sessions(
 276                 sd_bus *bus,
 277                 const char *path,
 278                 const char *interface,
 279                 const char *property,
 280                 sd_bus_message *reply,
 281                 void *userdata,
 282                 sd_bus_error *error) {
 283
 284         Manager *m = userdata;
 285
 286         assert(bus);
 287         assert(reply);
 288         assert(m);
 289
 290         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->sessions));
 291 }
 292
 293 static int property_get_current_inhibitors(
 294                 sd_bus *bus,
 295                 const char *path,
 296                 const char *interface,
 297                 const char *property,
 298                 sd_bus_message *reply,
 299                 void *userdata,
 300                 sd_bus_error *error) {
 301
 302         Manager *m = userdata;
 303
 304         assert(bus);
 305         assert(reply);
 306         assert(m);
 307
 308         return sd_bus_message_append(reply, "t", (uint64_t) hashmap_size(m->inhibitors));
 309 }
 310
 311 static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 312         _cleanup_free_ char *p = NULL;
 313         Manager *m = userdata;
 314         const char *name;
 315         Session *session;
 316         int r;
 317
 318         assert(message);
 319         assert(m);
 320
 321         r = sd_bus_message_read(message, "s", &name);
 322         if (r < 0)
 323                 return r;
 324
 325         r = manager_get_session_from_creds(m, message, name, error, &session);
 326         if (r < 0)
 327                 return r;
 328
 329         p = session_bus_path(session);
 330         if (!p)
 331                 return -ENOMEM;
 332
 333         return sd_bus_reply_method_return(message, "o", p);
 334 }
 335
 336 static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 337         _cleanup_free_ char *p = NULL;
 338         Session *session = NULL;
 339         Manager *m = userdata;
 340         pid_t pid;
 341         int r;
 342
 343         assert(message);
 344         assert(m);
 345
 346         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 347
 348         r = sd_bus_message_read(message, "u", &pid);
 349         if (r < 0)
 350                 return r;
 351         if (pid < 0)
 352                 return -EINVAL;
 353
 354         if (pid == 0) {
 355                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 356                 if (r < 0)
 357                         return r;
 358         } else {
 359                 r = manager_get_session_by_pid(m, pid, &session);
 360                 if (r < 0)
 361                         return r;
 362
 363                 if (!session)
 364                         return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid);
 365         }
 366
 367         p = session_bus_path(session);
 368         if (!p)
 369                 return -ENOMEM;
 370
 371         return sd_bus_reply_method_return(message, "o", p);
 372 }
 373
 374 static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 375         _cleanup_free_ char *p = NULL;
 376         Manager *m = userdata;
 377         uint32_t uid;
 378         User *user;
 379         int r;
 380
 381         assert(message);
 382         assert(m);
 383
 384         r = sd_bus_message_read(message, "u", &uid);
 385         if (r < 0)
 386                 return r;
 387
 388         r = manager_get_user_from_creds(m, message, uid, error, &user);
 389         if (r < 0)
 390                 return r;
 391
 392         p = user_bus_path(user);
 393         if (!p)
 394                 return -ENOMEM;
 395
 396         return sd_bus_reply_method_return(message, "o", p);
 397 }
 398
 399 static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 400         _cleanup_free_ char *p = NULL;
 401         Manager *m = userdata;
 402         User *user = NULL;
 403         pid_t pid;
 404         int r;
 405
 406         assert(message);
 407         assert(m);
 408
 409         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 410
 411         r = sd_bus_message_read(message, "u", &pid);
 412         if (r < 0)
 413                 return r;
 414         if (pid < 0)
 415                 return -EINVAL;
 416
 417         if (pid == 0) {
 418                 r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user);
 419                 if (r < 0)
 420                         return r;
 421         } else {
 422                 r = manager_get_user_by_pid(m, pid, &user);
 423                 if (r < 0)
 424                         return r;
 425                 if (!user)
 426                         return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "PID "PID_FMT" does not belong to any known or logged in user", pid);
 427         }
 428
 429         p = user_bus_path(user);
 430         if (!p)
 431                 return -ENOMEM;
 432
 433         return sd_bus_reply_method_return(message, "o", p);
 434 }
 435
 436 static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 437         _cleanup_free_ char *p = NULL;
 438         Manager *m = userdata;
 439         const char *name;
 440         Seat *seat;
 441         int r;
 442
 443         assert(message);
 444         assert(m);
 445
 446         r = sd_bus_message_read(message, "s", &name);
 447         if (r < 0)
 448                 return r;
 449
 450         r = manager_get_seat_from_creds(m, message, name, error, &seat);
 451         if (r < 0)
 452                 return r;
 453
 454         p = seat_bus_path(seat);
 455         if (!p)
 456                 return -ENOMEM;
 457
 458         return sd_bus_reply_method_return(message, "o", p);
 459 }
 460
 461 static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 462         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 463         Manager *m = userdata;
 464         Session *session;
 465         Iterator i;
 466         int r;
 467
 468         assert(message);
 469         assert(m);
 470
 471         r = sd_bus_message_new_method_return(message, &reply);
 472         if (r < 0)
 473                 return r;
 474
 475         r = sd_bus_message_open_container(reply, 'a', "(susso)");
 476         if (r < 0)
 477                 return r;
 478
 479         HASHMAP_FOREACH(session, m->sessions, i) {
 480                 _cleanup_free_ char *p = NULL;
 481
 482                 p = session_bus_path(session);
 483                 if (!p)
 484                         return -ENOMEM;
 485
 486                 r = sd_bus_message_append(reply, "(susso)",
 487                                           session->id,
 488                                           (uint32_t) session->user->uid,
 489                                           session->user->name,
 490                                           session->seat ? session->seat->id : "",
 491                                           p);
 492                 if (r < 0)
 493                         return r;
 494         }
 495
 496         r = sd_bus_message_close_container(reply);
 497         if (r < 0)
 498                 return r;
 499
 500         return sd_bus_send(NULL, reply, NULL);
 501 }
 502
 503 static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 504         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 505         Manager *m = userdata;
 506         User *user;
 507         Iterator i;
 508         int r;
 509
 510         assert(message);
 511         assert(m);
 512
 513         r = sd_bus_message_new_method_return(message, &reply);
 514         if (r < 0)
 515                 return r;
 516
 517         r = sd_bus_message_open_container(reply, 'a', "(uso)");
 518         if (r < 0)
 519                 return r;
 520
 521         HASHMAP_FOREACH(user, m->users, i) {
 522                 _cleanup_free_ char *p = NULL;
 523
 524                 p = user_bus_path(user);
 525                 if (!p)
 526                         return -ENOMEM;
 527
 528                 r = sd_bus_message_append(reply, "(uso)",
 529                                           (uint32_t) user->uid,
 530                                           user->name,
 531                                           p);
 532                 if (r < 0)
 533                         return r;
 534         }
 535
 536         r = sd_bus_message_close_container(reply);
 537         if (r < 0)
 538                 return r;
 539
 540         return sd_bus_send(NULL, reply, NULL);
 541 }
 542
 543 static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 544         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 545         Manager *m = userdata;
 546         Seat *seat;
 547         Iterator i;
 548         int r;
 549
 550         assert(message);
 551         assert(m);
 552
 553         r = sd_bus_message_new_method_return(message, &reply);
 554         if (r < 0)
 555                 return r;
 556
 557         r = sd_bus_message_open_container(reply, 'a', "(so)");
 558         if (r < 0)
 559                 return r;
 560
 561         HASHMAP_FOREACH(seat, m->seats, i) {
 562                 _cleanup_free_ char *p = NULL;
 563
 564                 p = seat_bus_path(seat);
 565                 if (!p)
 566                         return -ENOMEM;
 567
 568                 r = sd_bus_message_append(reply, "(so)", seat->id, p);
 569                 if (r < 0)
 570                         return r;
 571         }
 572
 573         r = sd_bus_message_close_container(reply);
 574         if (r < 0)
 575                 return r;
 576
 577         return sd_bus_send(NULL, reply, NULL);
 578 }
 579
 580 static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 581         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 582         Manager *m = userdata;
 583         Inhibitor *inhibitor;
 584         Iterator i;
 585         int r;
 586
 587         assert(message);
 588         assert(m);
 589
 590         r = sd_bus_message_new_method_return(message, &reply);
 591         if (r < 0)
 592                 return r;
 593
 594         r = sd_bus_message_open_container(reply, 'a', "(ssssuu)");
 595         if (r < 0)
 596                 return r;
 597
 598         HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
 599
 600                 r = sd_bus_message_append(reply, "(ssssuu)",
 601                                           strempty(inhibit_what_to_string(inhibitor->what)),
 602                                           strempty(inhibitor->who),
 603                                           strempty(inhibitor->why),
 604                                           strempty(inhibit_mode_to_string(inhibitor->mode)),
 605                                           (uint32_t) inhibitor->uid,
 606                                           (uint32_t) inhibitor->pid);
 607                 if (r < 0)
 608                         return r;
 609         }
 610
 611         r = sd_bus_message_close_container(reply);
 612         if (r < 0)
 613                 return r;
 614
 615         return sd_bus_send(NULL, reply, NULL);
 616 }
 617
 618 static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 619         const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop;
 620         uint32_t audit_id = 0;
 621         _cleanup_free_ char *id = NULL;
 622         Session *session = NULL;
 623         Manager *m = userdata;
 624         User *user = NULL;
 625         Seat *seat = NULL;
 626         pid_t leader;
 627         uid_t uid;
 628         int remote;
 629         uint32_t vtnr = 0;
 630         SessionType t;
 631         SessionClass c;
 632         int r;
 633
 634         assert(message);
 635         assert(m);
 636
 637         assert_cc(sizeof(pid_t) == sizeof(uint32_t));
 638         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 639
 640         r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host);
 641         if (r < 0)
 642                 return r;
 643
 644         if (!uid_is_valid(uid))
 645                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID");
 646         if (leader < 0 || leader == 1)
 647                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID");
 648
 649         if (isempty(type))
 650                 t = _SESSION_TYPE_INVALID;
 651         else {
 652                 t = session_type_from_string(type);
 653                 if (t < 0)
 654                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type);
 655         }
 656
 657         if (isempty(class))
 658                 c = _SESSION_CLASS_INVALID;
 659         else {
 660                 c = session_class_from_string(class);
 661                 if (c < 0)
 662                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class);
 663         }
 664
 665         if (isempty(desktop))
 666                 desktop = NULL;
 667         else {
 668                 if (!string_is_safe(desktop))
 669                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop);
 670         }
 671
 672         if (isempty(cseat))
 673                 seat = NULL;
 674         else {
 675                 seat = hashmap_get(m->seats, cseat);
 676                 if (!seat)
 677                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat);
 678         }
 679
 680         if (tty_is_vc(tty)) {
 681                 int v;
 682
 683                 if (!seat)
 684                         seat = m->seat0;
 685                 else if (seat != m->seat0)
 686                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TTY %s is virtual console but seat %s is not seat0", tty, seat->id);
 687
 688                 v = vtnr_from_tty(tty);
 689                 if (v <= 0)
 690                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty);
 691
 692                 if (!vtnr)
 693                         vtnr = (uint32_t) v;
 694                 else if (vtnr != (uint32_t) v)
 695                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match");
 696
 697         } else if (tty_is_console(tty)) {
 698
 699                 if (!seat)
 700                         seat = m->seat0;
 701                 else if (seat != m->seat0)
 702                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0");
 703
 704                 if (vtnr != 0)
 705                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0");
 706         }
 707
 708         if (seat) {
 709                 if (seat_has_vts(seat)) {
 710                         if (!vtnr || vtnr > 63)
 711                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range");
 712                 } else {
 713                         if (vtnr != 0)
 714                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0");
 715                 }
 716         }
 717
 718         r = sd_bus_message_enter_container(message, 'a', "(sv)");
 719         if (r < 0)
 720                 return r;
 721
 722         if (t == _SESSION_TYPE_INVALID) {
 723                 if (!isempty(display))
 724                         t = SESSION_X11;
 725                 else if (!isempty(tty))
 726                         t = SESSION_TTY;
 727                 else
 728                         t = SESSION_UNSPECIFIED;
 729         }
 730
 731         if (c == _SESSION_CLASS_INVALID) {
 732                 if (t == SESSION_UNSPECIFIED)
 733                         c = SESSION_BACKGROUND;
 734                 else
 735                         c = SESSION_USER;
 736         }
 737
 738         if (leader == 0) {
 739                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 740
 741                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
 742                 if (r < 0)
 743                         return r;
 744
 745                 r = sd_bus_creds_get_pid(creds, (pid_t*) &leader);
 746                 if (r < 0)
 747                         return r;
 748         }
 749
 750         r = manager_get_session_by_pid(m, leader, NULL);
 751         if (r > 0)
 752                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session");
 753
 754         /*
 755          * Old gdm and lightdm start the user-session on the same VT as
 756          * the greeter session. But they destroy the greeter session
 757          * after the user-session and want the user-session to take
 758          * over the VT. We need to support this for
 759          * backwards-compatibility, so make sure we allow new sessions
 760          * on a VT that a greeter is running on. Furthermore, to allow
 761          * re-logins, we have to allow a greeter to take over a used VT for
 762          * the exact same reasons.
 763          */
 764         if (c != SESSION_GREETER &&
 765             vtnr > 0 &&
 766             vtnr < m->seat0->position_count &&
 767             m->seat0->positions[vtnr] &&
 768             m->seat0->positions[vtnr]->class != SESSION_GREETER)
 769                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session");
 770
 771         if (hashmap_size(m->sessions) >= m->sessions_max)
 772                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max);
 773
 774         (void) audit_session_from_pid(leader, &audit_id);
 775         if (audit_session_is_valid(audit_id)) {
 776                 /* Keep our session IDs and the audit session IDs in sync */
 777
 778                 if (asprintf(&id, "%"PRIu32, audit_id) < 0)
 779                         return -ENOMEM;
 780
 781                 /* Wut? There's already a session by this name and we
 782                  * didn't find it above? Weird, then let's not trust
 783                  * the audit data and let's better register a new
 784                  * ID */
 785                 if (hashmap_get(m->sessions, id)) {
 786                         log_warning("Existing logind session ID %s used by new audit session, ignoring", id);
 787                         audit_id = AUDIT_SESSION_INVALID;
 788
 789                         id = mfree(id);
 790                 }
 791         }
 792
 793         if (!id) {
 794                 do {
 795                         id = mfree(id);
 796
 797                         if (asprintf(&id, "c%lu", ++m->session_counter) < 0)
 798                                 return -ENOMEM;
 799
 800                 } while (hashmap_get(m->sessions, id));
 801         }
 802
 803         r = manager_add_user_by_uid(m, uid, &user);
 804         if (r < 0)
 805                 goto fail;
 806
 807         r = manager_add_session(m, id, &session);
 808         if (r < 0)
 809                 goto fail;
 810
 811         session_set_user(session, user);
 812
 813         session->leader = leader;
 814         session->audit_id = audit_id;
 815         session->type = t;
 816         session->class = c;
 817         session->remote = remote;
 818         session->vtnr = vtnr;
 819
 820         if (!isempty(tty)) {
 821                 session->tty = strdup(tty);
 822                 if (!session->tty) {
 823                         r = -ENOMEM;
 824                         goto fail;
 825                 }
 826         }
 827
 828         if (!isempty(display)) {
 829                 session->display = strdup(display);
 830                 if (!session->display) {
 831                         r = -ENOMEM;
 832                         goto fail;
 833                 }
 834         }
 835
 836         if (!isempty(remote_user)) {
 837                 session->remote_user = strdup(remote_user);
 838                 if (!session->remote_user) {
 839                         r = -ENOMEM;
 840                         goto fail;
 841                 }
 842         }
 843
 844         if (!isempty(remote_host)) {
 845                 session->remote_host = strdup(remote_host);
 846                 if (!session->remote_host) {
 847                         r = -ENOMEM;
 848                         goto fail;
 849                 }
 850         }
 851
 852         if (!isempty(service)) {
 853                 session->service = strdup(service);
 854                 if (!session->service) {
 855                         r = -ENOMEM;
 856                         goto fail;
 857                 }
 858         }
 859
 860         if (!isempty(desktop)) {
 861                 session->desktop = strdup(desktop);
 862                 if (!session->desktop) {
 863                         r = -ENOMEM;
 864                         goto fail;
 865                 }
 866         }
 867
 868         if (seat) {
 869                 r = seat_attach_session(seat, session);
 870                 if (r < 0)
 871                         goto fail;
 872         }
 873
 874         r = session_start(session);
 875         if (r < 0)
 876                 goto fail;
 877
 878         session->create_message = sd_bus_message_ref(message);
 879
 880 #if 0 /// UNNEEDED by elogind
 881         /* Now, let's wait until the slice unit and stuff got
 882          * created. We send the reply back from
 883          * session_send_create_reply(). */
 884 #else
 885         /* We reply directly. */
 886
 887         r = session_send_create_reply(session, NULL);
 888         if (r < 0)
 889                 goto fail;
 890 #endif // 0
 891
 892         return 1;
 893
 894 fail:
 895         if (session)
 896                 session_add_to_gc_queue(session);
 897
 898         if (user)
 899                 user_add_to_gc_queue(user);
 900
 901         return r;
 902 }
 903
 904 static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 905         Manager *m = userdata;
 906         Session *session;
 907         const char *name;
 908         int r;
 909
 910         assert(message);
 911         assert(m);
 912
 913         r = sd_bus_message_read(message, "s", &name);
 914         if (r < 0)
 915                 return r;
 916
 917         r = manager_get_session_from_creds(m, message, name, error, &session);
 918         if (r < 0)
 919                 return r;
 920
 921         r = session_release(session);
 922         if (r < 0)
 923                 return r;
 924
 925 #if 1 /// elogind must queue this session
 926         session_add_to_gc_queue(session);
 927 #endif // 1
 928         return sd_bus_reply_method_return(message, NULL);
 929 }
 930
 931 static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 932         Manager *m = userdata;
 933         Session *session;
 934         const char *name;
 935         int r;
 936
 937         assert(message);
 938         assert(m);
 939
 940         r = sd_bus_message_read(message, "s", &name);
 941         if (r < 0)
 942                 return r;
 943
 944         r = manager_get_session_from_creds(m, message, name, error, &session);
 945         if (r < 0)
 946                 return r;
 947
 948         return bus_session_method_activate(message, session, error);
 949 }
 950
 951 static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 952         const char *session_name, *seat_name;
 953         Manager *m = userdata;
 954         Session *session;
 955         Seat *seat;
 956         int r;
 957
 958         assert(message);
 959         assert(m);
 960
 961         /* Same as ActivateSession() but refuses to work if
 962          * the seat doesn't match */
 963
 964         r = sd_bus_message_read(message, "ss", &session_name, &seat_name);
 965         if (r < 0)
 966                 return r;
 967
 968         r = manager_get_session_from_creds(m, message, session_name, error, &session);
 969         if (r < 0)
 970                 return r;
 971
 972         r = manager_get_seat_from_creds(m, message, seat_name, error, &seat);
 973         if (r < 0)
 974                 return r;
 975
 976         if (session->seat != seat)
 977                 return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name);
 978
 979         r = session_activate(session);
 980         if (r < 0)
 981                 return r;
 982
 983         return sd_bus_reply_method_return(message, NULL);
 984 }
 985
 986 static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 987         Manager *m = userdata;
 988         Session *session;
 989         const char *name;
 990         int r;
 991
 992         assert(message);
 993         assert(m);
 994
 995         r = sd_bus_message_read(message, "s", &name);
 996         if (r < 0)
 997                 return r;
 998
 999         r = manager_get_session_from_creds(m, message, name, error, &session);
1000         if (r < 0)
1001                 return r;
1002
1003         return bus_session_method_lock(message, session, error);
1004 }
1005
1006 static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1007         Manager *m = userdata;
1008         int r;
1009
1010         assert(message);
1011         assert(m);
1012
1013         r = bus_verify_polkit_async(
1014                         message,
1015                         CAP_SYS_ADMIN,
1016                         "org.freedesktop.login1.lock-sessions",
1017                         NULL,
1018                         false,
1019                         UID_INVALID,
1020                         &m->polkit_registry,
1021                         error);
1022         if (r < 0)
1023                 return r;
1024         if (r == 0)
1025                 return 1; /* Will call us back */
1026
1027         r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions"));
1028         if (r < 0)
1029                 return r;
1030
1031         return sd_bus_reply_method_return(message, NULL);
1032 }
1033
1034 static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1035         const char *name;
1036         Manager *m = userdata;
1037         Session *session;
1038         int r;
1039
1040         assert(message);
1041         assert(m);
1042
1043         r = sd_bus_message_read(message, "s", &name);
1044         if (r < 0)
1045                 return r;
1046
1047         r = manager_get_session_from_creds(m, message, name, error, &session);
1048         if (r < 0)
1049                 return r;
1050
1051         return bus_session_method_kill(message, session, error);
1052 }
1053
1054 static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1055         Manager *m = userdata;
1056         uint32_t uid;
1057         User *user;
1058         int r;
1059
1060         assert(message);
1061         assert(m);
1062
1063         r = sd_bus_message_read(message, "u", &uid);
1064         if (r < 0)
1065                 return r;
1066
1067         r = manager_get_user_from_creds(m, message, uid, error, &user);
1068         if (r < 0)
1069                 return r;
1070
1071         return bus_user_method_kill(message, user, error);
1072 }
1073
1074 static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1075         Manager *m = userdata;
1076         const char *name;
1077         Session *session;
1078         int r;
1079
1080         assert(message);
1081         assert(m);
1082
1083         r = sd_bus_message_read(message, "s", &name);
1084         if (r < 0)
1085                 return r;
1086
1087         r = manager_get_session_from_creds(m, message, name, error, &session);
1088         if (r < 0)
1089                 return r;
1090
1091         return bus_session_method_terminate(message, session, error);
1092 }
1093
1094 static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1095         Manager *m = userdata;
1096         uint32_t uid;
1097         User *user;
1098         int r;
1099
1100         assert(message);
1101         assert(m);
1102
1103         r = sd_bus_message_read(message, "u", &uid);
1104         if (r < 0)
1105                 return r;
1106
1107         r = manager_get_user_from_creds(m, message, uid, error, &user);
1108         if (r < 0)
1109                 return r;
1110
1111         return bus_user_method_terminate(message, user, error);
1112 }
1113
1114 static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1115         Manager *m = userdata;
1116         const char *name;
1117         Seat *seat;
1118         int r;
1119
1120         assert(message);
1121         assert(m);
1122
1123         r = sd_bus_message_read(message, "s", &name);
1124         if (r < 0)
1125                 return r;
1126
1127         r = manager_get_seat_from_creds(m, message, name, error, &seat);
1128         if (r < 0)
1129                 return r;
1130
1131         return bus_seat_method_terminate(message, seat, error);
1132 }
1133
1134 static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1135         _cleanup_free_ char *cc = NULL;
1136         Manager *m = userdata;
1137         int r, b, interactive;
1138         struct passwd *pw;
1139         const char *path;
1140         uint32_t uid;
1141         bool self = false;
1142
1143         assert(message);
1144         assert(m);
1145
1146         r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive);
1147         if (r < 0)
1148                 return r;
1149
1150         if (!uid_is_valid(uid)) {
1151                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1152
1153                 /* Note that we get the owner UID of the session, not the actual client UID here! */
1154                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
1155                 if (r < 0)
1156                         return r;
1157
1158                 r = sd_bus_creds_get_owner_uid(creds, &uid);
1159                 if (r < 0)
1160                         return r;
1161
1162                 self = true;
1163
1164         } else if (!uid_is_valid(uid))
1165                 return -EINVAL;
1166
1167         errno = 0;
1168         pw = getpwuid(uid);
1169         if (!pw)
1170                 return errno > 0 ? -errno : -ENOENT;
1171
1172         r = bus_verify_polkit_async(
1173                         message,
1174                         CAP_SYS_ADMIN,
1175                         self ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger",
1176                         NULL,
1177                         interactive,
1178                         UID_INVALID,
1179                         &m->polkit_registry,
1180                         error);
1181         if (r < 0)
1182                 return r;
1183         if (r == 0)
1184                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1185
1186         mkdir_p_label("/var/lib/systemd", 0755);
1187
1188         r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0);
1189         if (r < 0)
1190                 return r;
1191
1192         cc = cescape(pw->pw_name);
1193         if (!cc)
1194                 return -ENOMEM;
1195
1196         path = strjoina("/var/lib/systemd/linger/", cc);
1197         if (b) {
1198                 User *u;
1199
1200                 r = touch(path);
1201                 if (r < 0)
1202                         return r;
1203
1204                 if (manager_add_user_by_uid(m, uid, &u) >= 0)
1205                         user_start(u);
1206
1207         } else {
1208                 User *u;
1209
1210                 r = unlink(path);
1211                 if (r < 0 && errno != ENOENT)
1212                         return -errno;
1213
1214                 u = hashmap_get(m->users, UID_TO_PTR(uid));
1215                 if (u)
1216                         user_add_to_gc_queue(u);
1217         }
1218
1219         return sd_bus_reply_method_return(message, NULL);
1220 }
1221
1222 static int trigger_device(Manager *m, struct udev_device *d) {
1223         _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
1224         struct udev_list_entry *first, *item;
1225         int r;
1226
1227         assert(m);
1228
1229         e = udev_enumerate_new(m->udev);
1230         if (!e)
1231                 return -ENOMEM;
1232
1233         if (d) {
1234                 r = udev_enumerate_add_match_parent(e, d);
1235                 if (r < 0)
1236                         return r;
1237         }
1238
1239         r = udev_enumerate_scan_devices(e);
1240         if (r < 0)
1241                 return r;
1242
1243         first = udev_enumerate_get_list_entry(e);
1244         udev_list_entry_foreach(item, first) {
1245                 _cleanup_free_ char *t = NULL;
1246                 const char *p;
1247
1248                 p = udev_list_entry_get_name(item);
1249
1250                 t = strappend(p, "/uevent");
1251                 if (!t)
1252                         return -ENOMEM;
1253
1254                 write_string_file(t, "change", WRITE_STRING_FILE_CREATE);
1255         }
1256
1257         return 0;
1258 }
1259
1260 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
1261         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
1262         _cleanup_free_ char *rule = NULL, *file = NULL;
1263         const char *id_for_seat;
1264         int r;
1265
1266         assert(m);
1267         assert(seat);
1268         assert(sysfs);
1269
1270         d = udev_device_new_from_syspath(m->udev, sysfs);
1271         if (!d)
1272                 return -ENODEV;
1273
1274         if (!udev_device_has_tag(d, "seat"))
1275                 return -ENODEV;
1276
1277         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
1278         if (!id_for_seat)
1279                 return -ENODEV;
1280
1281         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0)
1282                 return -ENOMEM;
1283
1284         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0)
1285                 return -ENOMEM;
1286
1287         mkdir_p_label("/etc/udev/rules.d", 0755);
1288         r = write_string_file_atomic_label(file, rule);
1289         if (r < 0)
1290                 return r;
1291
1292         return trigger_device(m, d);
1293 }
1294
1295 static int flush_devices(Manager *m) {
1296         _cleanup_closedir_ DIR *d;
1297
1298         assert(m);
1299
1300         d = opendir("/etc/udev/rules.d");
1301         if (!d) {
1302                 if (errno != ENOENT)
1303                         log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m");
1304         } else {
1305                 struct dirent *de;
1306
1307                 FOREACH_DIRENT_ALL(de, d, break) {
1308                         if (!dirent_is_file(de))
1309                                 continue;
1310
1311                         if (!startswith(de->d_name, "72-seat-"))
1312                                 continue;
1313
1314                         if (!endswith(de->d_name, ".rules"))
1315                                 continue;
1316
1317                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
1318                                 log_warning_errno(errno, "Failed to unlink %s: %m", de->d_name);
1319                 }
1320         }
1321
1322         return trigger_device(m, NULL);
1323 }
1324
1325 static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1326         const char *sysfs, *seat;
1327         Manager *m = userdata;
1328         int interactive, r;
1329
1330         assert(message);
1331         assert(m);
1332
1333         r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive);
1334         if (r < 0)
1335                 return r;
1336
1337         if (!path_startswith(sysfs, "/sys"))
1338                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs);
1339
1340         if (!seat_name_is_valid(seat))
1341                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat %s is not valid", seat);
1342
1343         r = bus_verify_polkit_async(
1344                         message,
1345                         CAP_SYS_ADMIN,
1346                         "org.freedesktop.login1.attach-device",
1347                         NULL,
1348                         interactive,
1349                         UID_INVALID,
1350                         &m->polkit_registry,
1351                         error);
1352         if (r < 0)
1353                 return r;
1354         if (r == 0)
1355                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1356
1357         r = attach_device(m, seat, sysfs);
1358         if (r < 0)
1359                 return r;
1360
1361         return sd_bus_reply_method_return(message, NULL);
1362 }
1363
1364 static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1365         Manager *m = userdata;
1366         int interactive, r;
1367
1368         assert(message);
1369         assert(m);
1370
1371         r = sd_bus_message_read(message, "b", &interactive);
1372         if (r < 0)
1373                 return r;
1374
1375         r = bus_verify_polkit_async(
1376                         message,
1377                         CAP_SYS_ADMIN,
1378                         "org.freedesktop.login1.flush-devices",
1379                         NULL,
1380                         interactive,
1381                         UID_INVALID,
1382                         &m->polkit_registry,
1383                         error);
1384         if (r < 0)
1385                 return r;
1386         if (r == 0)
1387                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1388
1389         r = flush_devices(m);
1390         if (r < 0)
1391                 return r;
1392
1393         return sd_bus_reply_method_return(message, NULL);
1394 }
1395
1396 static int have_multiple_sessions(
1397                 Manager *m,
1398                 uid_t uid) {
1399
1400         Session *session;
1401         Iterator i;
1402
1403         assert(m);
1404
1405         /* Check for other users' sessions. Greeter sessions do not
1406          * count, and non-login sessions do not count either. */
1407         HASHMAP_FOREACH(session, m->sessions, i)
1408                 if (session->class == SESSION_USER &&
1409                     session->user->uid != uid)
1410                         return true;
1411
1412         return false;
1413 }
1414
1415 #if 0 /// elogind has its own variant in elogind-dbus.c
1416 static int bus_manager_log_shutdown(
1417                 Manager *m,
1418                 const char *unit_name) {
1419
1420         const char *p, *q;
1421
1422         assert(m);
1423         assert(unit_name);
1424
1425         if (streq(unit_name, SPECIAL_POWEROFF_TARGET)) {
1426                 p = "MESSAGE=System is powering down";
1427                 q = "SHUTDOWN=power-off";
1428         } else if (streq(unit_name, SPECIAL_HALT_TARGET)) {
1429                 p = "MESSAGE=System is halting";
1430                 q = "SHUTDOWN=halt";
1431         } else if (streq(unit_name, SPECIAL_REBOOT_TARGET)) {
1432                 p = "MESSAGE=System is rebooting";
1433                 q = "SHUTDOWN=reboot";
1434         } else if (streq(unit_name, SPECIAL_KEXEC_TARGET)) {
1435                 p = "MESSAGE=System is rebooting with kexec";
1436                 q = "SHUTDOWN=kexec";
1437         } else {
1438                 p = "MESSAGE=System is shutting down";
1439                 q = NULL;
1440         }
1441
1442         if (isempty(m->wall_message))
1443                 p = strjoina(p, ".");
1444         else
1445                 p = strjoina(p, " (", m->wall_message, ").");
1446
1447         return log_struct(LOG_NOTICE,
1448                           "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
1449                           p,
1450                           q,
1451                           NULL);
1452 }
1453 #endif // 0
1454
1455 static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) {
1456         Manager *m = userdata;
1457
1458         assert(e);
1459         assert(m);
1460
1461         m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source);
1462         return 0;
1463 }
1464
1465 int manager_set_lid_switch_ignore(Manager *m, usec_t until) {
1466         int r;
1467
1468         assert(m);
1469
1470         if (until <= now(CLOCK_MONOTONIC))
1471                 return 0;
1472
1473         /* We want to ignore the lid switch for a while after each
1474          * suspend, and after boot-up. Hence let's install a timer for
1475          * this. As long as the event source exists we ignore the lid
1476          * switch. */
1477
1478         if (m->lid_switch_ignore_event_source) {
1479                 usec_t u;
1480
1481                 r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u);
1482                 if (r < 0)
1483                         return r;
1484
1485                 if (until <= u)
1486                         return 0;
1487
1488                 r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until);
1489         } else
1490                 r = sd_event_add_time(
1491                                 m->event,
1492                                 &m->lid_switch_ignore_event_source,
1493                                 CLOCK_MONOTONIC,
1494                                 until, 0,
1495                                 lid_switch_ignore_handler, m);
1496
1497         return r;
1498 }
1499
1500 #if 0 /// elogind has its own variant in elogind-dbus.c
1501 static int execute_shutdown_or_sleep(
1502                 Manager *m,
1503                 InhibitWhat w,
1504                 const char *unit_name,
1505                 sd_bus_error *error) {
1506
1507         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
1508         char *c = NULL;
1509         const char *p;
1510         int r;
1511
1512         assert(m);
1513         assert(w >= 0);
1514         assert(w < _INHIBIT_WHAT_MAX);
1515         assert(unit_name);
1516
1517         if (w == INHIBIT_SHUTDOWN)
1518                 bus_manager_log_shutdown(m, unit_name);
1519
1520         r = sd_bus_call_method(
1521                         m->bus,
1522                         "org.freedesktop.systemd1",
1523                         "/org/freedesktop/systemd1",
1524                         "org.freedesktop.systemd1.Manager",
1525                         "StartUnit",
1526                         error,
1527                         &reply,
1528                         "ss", unit_name, "replace-irreversibly");
1529         if (r < 0)
1530                 return r;
1531
1532         r = sd_bus_message_read(reply, "o", &p);
1533         if (r < 0)
1534                 return r;
1535
1536         c = strdup(p);
1537         if (!c)
1538                 return -ENOMEM;
1539
1540         m->action_unit = unit_name;
1541         free(m->action_job);
1542         m->action_job = c;
1543         m->action_what = w;
1544
1545         /* Make sure the lid switch is ignored for a while */
1546         manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
1547
1548         return 0;
1549 }
1550
1551 int manager_dispatch_delayed(Manager *manager, bool timeout) {
1552
1553         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1554         Inhibitor *offending = NULL;
1555         int r;
1556
1557         assert(manager);
1558
1559         if (manager->action_what == 0 || manager->action_job)
1560                 return 0;
1561
1562         if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
1563                 _cleanup_free_ char *comm = NULL, *u = NULL;
1564
1565                 if (!timeout)
1566                         return 0;
1567
1568                 (void) get_process_comm(offending->pid, &comm);
1569                 u = uid_to_name(offending->uid);
1570
1571                 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
1572                            offending->uid, strna(u),
1573                            offending->pid, strna(comm));
1574         }
1575
1576         /* Actually do the operation */
1577         r = execute_shutdown_or_sleep(manager, manager->action_what, manager->action_unit, &error);
1578         if (r < 0) {
1579                 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
1580
1581                 manager->action_unit = NULL;
1582                 manager->action_what = 0;
1583                 return r;
1584         }
1585
1586         return 1;
1587 }
1588 #endif // 0
1589
1590 #if 0 /// elogind-dbus.c needs to access this
1591 static int manager_inhibit_timeout_handler(
1592 #else
1593 int manager_inhibit_timeout_handler(
1594 #endif // 0
1595                         sd_event_source *s,
1596                         uint64_t usec,
1597                         void *userdata) {
1598
1599         Manager *manager = userdata;
1600         int r;
1601
1602         assert(manager);
1603         assert(manager->inhibit_timeout_source == s);
1604
1605         r = manager_dispatch_delayed(manager, true);
1606         return (r < 0) ? r : 0;
1607 }
1608
1609 #if 0 /// elogind has its own variant in elogind-dbus.c
1610 static int delay_shutdown_or_sleep(
1611                 Manager *m,
1612                 InhibitWhat w,
1613                 const char *unit_name) {
1614
1615         int r;
1616         usec_t timeout_val;
1617
1618         assert(m);
1619         assert(w >= 0);
1620         assert(w < _INHIBIT_WHAT_MAX);
1621         assert(unit_name);
1622
1623         timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
1624
1625         if (m->inhibit_timeout_source) {
1626                 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
1627                 if (r < 0)
1628                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
1629
1630                 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
1631                 if (r < 0)
1632                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
1633         } else {
1634                 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
1635                                       timeout_val, 0, manager_inhibit_timeout_handler, m);
1636                 if (r < 0)
1637                         return r;
1638         }
1639
1640         m->action_unit = unit_name;
1641         m->action_what = w;
1642
1643         return 0;
1644 }
1645 #endif // 0
1646
1647 #if 0 /// elogind-dbus.c needs to access this
1648 static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1649 #else
1650 int send_prepare_for(Manager *m, InhibitWhat w, bool _active) {
1651 #endif // 0
1652
1653         static const char * const signal_name[_INHIBIT_WHAT_MAX] = {
1654                 [INHIBIT_SHUTDOWN] = "PrepareForShutdown",
1655                 [INHIBIT_SLEEP] = "PrepareForSleep"
1656         };
1657
1658         int active = _active;
1659
1660         assert(m);
1661         assert(w >= 0);
1662         assert(w < _INHIBIT_WHAT_MAX);
1663         assert(signal_name[w]);
1664
1665         return sd_bus_emit_signal(m->bus,
1666                                   "/org/freedesktop/login1",
1667                                   "org.freedesktop.login1.Manager",
1668                                   signal_name[w],
1669                                   "b",
1670                                   active);
1671 }
1672
1673 #if 0 /// elogind has its own variant in elogind-dbus.c
1674 int bus_manager_shutdown_or_sleep_now_or_later(
1675                 Manager *m,
1676                 const char *unit_name,
1677                 InhibitWhat w,
1678                 sd_bus_error *error) {
1679
1680         bool delayed;
1681         int r;
1682
1683         assert(m);
1684         assert(unit_name);
1685         assert(w >= 0);
1686         assert(w <= _INHIBIT_WHAT_MAX);
1687         assert(!m->action_job);
1688
1689         /* Tell everybody to prepare for shutdown/sleep */
1690         send_prepare_for(m, w, true);
1691
1692         delayed =
1693                 m->inhibit_delay_max > 0 &&
1694                 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
1695
1696         log_debug_elogind("%s called for %s (%sdelayed)", __FUNCTION__,
1697                           handle_action_to_string(action),
1698                           delayed ? "" : "NOT ");
1699         if (delayed)
1700                 /* Shutdown is delayed, keep in mind what we
1701                  * want to do, and start a timeout */
1702                 r = delay_shutdown_or_sleep(m, w, unit_name);
1703         else
1704                 /* Shutdown is not delayed, execute it
1705                  * immediately */
1706                 r = execute_shutdown_or_sleep(m, w, unit_name, error);
1707
1708         return r;
1709 }
1710 #endif // 0
1711
1712 #if 0 /// elogind-dbus.c needs to access this
1713 static int verify_shutdown_creds(
1714 #else
1715 int verify_shutdown_creds(
1716 #endif // 0
1717                 Manager *m,
1718                 sd_bus_message *message,
1719                 InhibitWhat w,
1720                 bool interactive,
1721                 const char *action,
1722                 const char *action_multiple_sessions,
1723                 const char *action_ignore_inhibit,
1724                 sd_bus_error *error) {
1725
1726         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
1727         bool multiple_sessions, blocked;
1728         uid_t uid;
1729         int r;
1730
1731         assert(m);
1732         assert(message);
1733         assert(w >= 0);
1734         assert(w <= _INHIBIT_WHAT_MAX);
1735
1736         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
1737         if (r < 0)
1738                 return r;
1739
1740         r = sd_bus_creds_get_euid(creds, &uid);
1741         if (r < 0)
1742                 return r;
1743
1744         r = have_multiple_sessions(m, uid);
1745         if (r < 0)
1746                 return r;
1747
1748         multiple_sessions = r > 0;
1749         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
1750
1751         if (multiple_sessions && action_multiple_sessions) {
1752                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1753                 if (r < 0)
1754                         return r;
1755                 if (r == 0)
1756                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1757         }
1758
1759         if (blocked && action_ignore_inhibit) {
1760                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1761                 if (r < 0)
1762                         return r;
1763                 if (r == 0)
1764                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1765         }
1766
1767         if (!multiple_sessions && !blocked && action) {
1768                 r = bus_verify_polkit_async(message, CAP_SYS_BOOT, action, NULL, interactive, UID_INVALID, &m->polkit_registry, error);
1769                 if (r < 0)
1770                         return r;
1771                 if (r == 0)
1772                         return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
1773         }
1774
1775         return 0;
1776 }
1777
1778 #if 0 /// elogind has its own variant in elogind-dbus.c
1779 static int method_do_shutdown_or_sleep(
1780                 Manager *m,
1781                 sd_bus_message *message,
1782                 const char *unit_name,
1783                 InhibitWhat w,
1784                 const char *action,
1785                 const char *action_multiple_sessions,
1786                 const char *action_ignore_inhibit,
1787                 const char *sleep_verb,
1788                 sd_bus_error *error) {
1789
1790         int interactive, r;
1791
1792         assert(m);
1793         assert(message);
1794         assert(unit_name);
1795         assert(w >= 0);
1796         assert(w <= _INHIBIT_WHAT_MAX);
1797
1798         r = sd_bus_message_read(message, "b", &interactive);
1799         if (r < 0)
1800                 return r;
1801
1802         log_debug_elogind("%s called with action '%s', sleep '%s' (%sinteractive)",
1803                           __FUNCTION__, action, sleep_verb,
1804                           interactive ? "" : "NOT ");
1805         /* Don't allow multiple jobs being executed at the same time */
1806         if (m->action_what)
1807                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
1808
1809         if (sleep_verb) {
1810                 r = can_sleep(sleep_verb);
1811                 if (r < 0)
1812                         return r;
1813
1814                 if (r == 0)
1815                         return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
1816         }
1817
1818         r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
1819                                   action_ignore_inhibit, error);
1820         log_debug_elogind("verify_shutdown_creds() returned %d", r);
1821         if (r != 0)
1822                 return r;
1823
1824         r = bus_manager_shutdown_or_sleep_now_or_later(m, unit_name, w, error);
1825         if (r < 0)
1826                 return r;
1827
1828         return sd_bus_reply_method_return(message, NULL);
1829 }
1830
1831 static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1832         Manager *m = userdata;
1833
1834         log_debug_elogind("%s called", __FUNCTION__);
1835         return method_do_shutdown_or_sleep(
1836                         m, message,
1837                         SPECIAL_POWEROFF_TARGET,
1838                         INHIBIT_SHUTDOWN,
1839                         "org.freedesktop.login1.power-off",
1840                         "org.freedesktop.login1.power-off-multiple-sessions",
1841                         "org.freedesktop.login1.power-off-ignore-inhibit",
1842                         NULL,
1843                         error);
1844 }
1845
1846 static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1847         Manager *m = userdata;
1848
1849         log_debug_elogind("%s called", __FUNCTION__);
1850         return method_do_shutdown_or_sleep(
1851                         m, message,
1852                         SPECIAL_REBOOT_TARGET,
1853                         INHIBIT_SHUTDOWN,
1854                         "org.freedesktop.login1.reboot",
1855                         "org.freedesktop.login1.reboot-multiple-sessions",
1856                         "org.freedesktop.login1.reboot-ignore-inhibit",
1857                         NULL,
1858                         error);
1859 }
1860
1861 static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
1862         Manager *m = userdata;
1863
1864         log_debug_elogind("%s called", __FUNCTION__);
1865         return method_do_shutdown_or_sleep(
1866                         m, message,
1867                         SPECIAL_SUSPEND_TARGET,
1868                         INHIBIT_SLEEP,
1869                         "org.freedesktop.login1.suspend",
1870                         "org.freedesktop.login1.suspend-multiple-sessions",
1871                         "org.freedesktop.login1.suspend-ignore-inhibit",
1872                         "suspend",
1873                         error);
1874 }
1875 #endif // 0
1876
1877 static int nologin_timeout_handler(
1878                         sd_event_source *s,
1879                         uint64_t usec,
1880                         void *userdata) {
1881
1882         Manager *m = userdata;
1883         int r;
1884
1885         log_info("Creating /run/nologin, blocking further logins...");
1886
1887         r = write_string_file_atomic_label("/run/nologin", "System is going down.");
1888         if (r < 0)
1889                 log_error_errno(r, "Failed to create /run/nologin: %m");
1890         else
1891                 m->unlink_nologin = true;
1892
1893         return 0;
1894 }
1895
1896 static int update_schedule_file(Manager *m) {
1897         _cleanup_free_ char *temp_path = NULL;
1898         _cleanup_fclose_ FILE *f = NULL;
1899         int r;
1900
1901         assert(m);
1902
1903         r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
1904         if (r < 0)
1905                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
1906
1907         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
1908         if (r < 0)
1909                 return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
1910
1911         (void) fchmod(fileno(f), 0644);
1912
1913         fprintf(f,
1914                 "USEC="USEC_FMT"\n"
1915                 "WARN_WALL=%i\n"
1916                 "MODE=%s\n",
1917                 m->scheduled_shutdown_timeout,
1918                 m->enable_wall_messages,
1919                 m->scheduled_shutdown_type);
1920
1921         if (!isempty(m->wall_message)) {
1922                 _cleanup_free_ char *t;
1923
1924                 t = cescape(m->wall_message);
1925                 if (!t) {
1926                         r = -ENOMEM;
1927                         goto fail;
1928                 }
1929
1930                 fprintf(f, "WALL_MESSAGE=%s\n", t);
1931         }
1932
1933         r = fflush_and_check(f);
1934         if (r < 0)
1935                 goto fail;
1936
1937         if (rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
1938                 r = -errno;
1939                 goto fail;
1940         }
1941
1942         return 0;
1943
1944 fail:
1945         (void) unlink(temp_path);
1946         (void) unlink("/run/systemd/shutdown/scheduled");
1947
1948         return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m");
1949 }
1950
1951 #if 0 /// elogind has its own variant in elogind-dbus.c
1952 static void reset_scheduled_shutdown(Manager *m) {
1953         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
1954         m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
1955         m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
1956         m->scheduled_shutdown_type = mfree(m->scheduled_shutdown_type);
1957         m->scheduled_shutdown_timeout = 0;
1958         m->shutdown_dry_run = false;
1959
1960         if (m->unlink_nologin) {
1961                 (void) unlink("/run/nologin");
1962                 m->unlink_nologin = false;
1963         }
1964         (void) unlink("/run/systemd/shutdown/scheduled");
1965 }
1966
1967 static int manager_scheduled_shutdown_handler(
1968                         sd_event_source *s,
1969                         uint64_t usec,
1970                         void *userdata) {
1971
1972         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1973         Manager *m = userdata;
1974         const char *target;
1975         int r;
1976
1977         assert(m);
1978
1979         if (isempty(m->scheduled_shutdown_type))
1980                 return 0;
1981
1982         if (streq(m->scheduled_shutdown_type, "halt"))
1983                 target = SPECIAL_HALT_TARGET;
1984         else if (streq(m->scheduled_shutdown_type, "poweroff"))
1985                 target = SPECIAL_POWEROFF_TARGET;
1986         else
1987                 target = SPECIAL_REBOOT_TARGET;
1988
1989         /* Don't allow multiple jobs being executed at the same time */
1990         if (m->action_what) {
1991                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
1992                 return -EALREADY;
1993         }
1994
1995         if (m->shutdown_dry_run) {
1996                 /* We do not process delay inhibitors here.  Otherwise, we
1997                  * would have to be considered "in progress" (like the check
1998                  * above) for some seconds after our admin has seen the final
1999                  * wall message. */
2000
2001                 bus_manager_log_shutdown(m, target);
2002                 log_info("Running in dry run, suppressing action.");
2003                 reset_scheduled_shutdown(m);
2004
2005                 return 0;
2006         }
2007
2008         r = bus_manager_shutdown_or_sleep_now_or_later(m, target, INHIBIT_SHUTDOWN, &error);
2009         if (r < 0)
2010                 return log_error_errno(r, "Scheduled shutdown to %s failed: %m", target);
2011
2012         return 0;
2013 }
2014 #endif // 0
2015
2016 static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2017         Manager *m = userdata;
2018         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2019         const char *action_multiple_sessions = NULL;
2020         const char *action_ignore_inhibit = NULL;
2021         const char *action = NULL;
2022         uint64_t elapse;
2023         char *type;
2024         int r;
2025
2026         assert(m);
2027         assert(message);
2028
2029         log_debug_elogind("%s called", __FUNCTION__);
2030         r = sd_bus_message_read(message, "st", &type, &elapse);
2031         if (r < 0)
2032                 return r;
2033
2034         if (startswith(type, "dry-")) {
2035                 type += 4;
2036                 m->shutdown_dry_run = true;
2037         }
2038
2039         if (streq(type, "reboot")) {
2040                 action = "org.freedesktop.login1.reboot";
2041                 action_multiple_sessions = "org.freedesktop.login1.reboot-multiple-sessions";
2042                 action_ignore_inhibit = "org.freedesktop.login1.reboot-ignore-inhibit";
2043         } else if (streq(type, "halt")) {
2044                 action = "org.freedesktop.login1.halt";
2045                 action_multiple_sessions = "org.freedesktop.login1.halt-multiple-sessions";
2046                 action_ignore_inhibit = "org.freedesktop.login1.halt-ignore-inhibit";
2047         } else if (streq(type, "poweroff")) {
2048                 action = "org.freedesktop.login1.power-off";
2049                 action_multiple_sessions = "org.freedesktop.login1.power-off-multiple-sessions";
2050                 action_ignore_inhibit = "org.freedesktop.login1.power-off-ignore-inhibit";
2051         } else
2052                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type");
2053
2054         r = verify_shutdown_creds(m, message, INHIBIT_SHUTDOWN, false,
2055                                   action, action_multiple_sessions, action_ignore_inhibit, error);
2056         if (r != 0)
2057                 return r;
2058
2059         if (m->scheduled_shutdown_timeout_source) {
2060                 r = sd_event_source_set_time(m->scheduled_shutdown_timeout_source, elapse);
2061                 if (r < 0)
2062                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2063
2064                 r = sd_event_source_set_enabled(m->scheduled_shutdown_timeout_source, SD_EVENT_ONESHOT);
2065                 if (r < 0)
2066                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2067         } else {
2068                 r = sd_event_add_time(m->event, &m->scheduled_shutdown_timeout_source,
2069                                       CLOCK_REALTIME, elapse, 0, manager_scheduled_shutdown_handler, m);
2070                 if (r < 0)
2071                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2072         }
2073
2074         r = free_and_strdup(&m->scheduled_shutdown_type, type);
2075         if (r < 0) {
2076                 m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2077                 return log_oom();
2078         }
2079
2080         if (m->nologin_timeout_source) {
2081                 r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
2082                 if (r < 0)
2083                         return log_error_errno(r, "sd_event_source_set_time() failed: %m");
2084
2085                 r = sd_event_source_set_enabled(m->nologin_timeout_source, SD_EVENT_ONESHOT);
2086                 if (r < 0)
2087                         return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
2088         } else {
2089                 r = sd_event_add_time(m->event, &m->nologin_timeout_source,
2090                                       CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
2091                 if (r < 0)
2092                         return log_error_errno(r, "sd_event_add_time() failed: %m");
2093         }
2094
2095         m->scheduled_shutdown_timeout = elapse;
2096
2097         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2098         if (r >= 0) {
2099                 const char *tty = NULL;
2100
2101                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
2102                 (void) sd_bus_creds_get_tty(creds, &tty);
2103
2104                 r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
2105                 if (r < 0) {
2106                         m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
2107                         return log_oom();
2108                 }
2109         }
2110
2111         r = manager_setup_wall_message_timer(m);
2112         if (r < 0)
2113                 return r;
2114
2115         r = update_schedule_file(m);
2116         if (r < 0)
2117                 return r;
2118
2119         return sd_bus_reply_method_return(message, NULL);
2120 }
2121
2122 static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2123         Manager *m = userdata;
2124         bool cancelled;
2125 #if 1 /// elogind needs to construct the message to allow extra wall messages
2126         _cleanup_free_ char *l = NULL;
2127 #endif // 1
2128
2129         assert(m);
2130         assert(message);
2131
2132         log_debug_elogind("%s called", __FUNCTION__);
2133         cancelled = m->scheduled_shutdown_type != NULL;
2134         reset_scheduled_shutdown(m);
2135
2136         if (cancelled) {
2137                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2138                 const char *tty = NULL;
2139                 uid_t uid = 0;
2140                 int r;
2141
2142                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
2143                 if (r >= 0) {
2144                         (void) sd_bus_creds_get_uid(creds, &uid);
2145                         (void) sd_bus_creds_get_tty(creds, &tty);
2146                 }
2147
2148 #if 0 /// elogind wants to allow extra cancellation messages
2149                 utmp_wall("The system shutdown has been cancelled",
2150                           uid_to_name(uid), tty, logind_wall_tty_filter, m);
2151 #else
2152                 r = asprintf(&l, "%s%sThe system shutdown has been cancelled!",
2153                              strempty(m->wall_message),
2154                              isempty(m->wall_message) ? "" : "\n");
2155                 if (r < 0) {
2156                         log_oom();
2157                         return 0;
2158                 }
2159
2160                 utmp_wall(l, uid_to_name(uid), tty, logind_wall_tty_filter, m);
2161 #endif // 0
2162         }
2163
2164         return sd_bus_reply_method_return(message, "b", cancelled);
2165 }
2166
2167 #if 0 /// elogind has its own variant in elogind-dbus.c
2168 static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2169         Manager *m = userdata;
2170
2171         log_debug_elogind("%s called", __FUNCTION__);
2172         return method_do_shutdown_or_sleep(
2173                         m, message,
2174                         SPECIAL_HIBERNATE_TARGET,
2175                         INHIBIT_SLEEP,
2176                         "org.freedesktop.login1.hibernate",
2177                         "org.freedesktop.login1.hibernate-multiple-sessions",
2178                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2179                         "hibernate",
2180                         error);
2181 }
2182
2183 static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2184         Manager *m = userdata;
2185
2186         log_debug_elogind("%s called", __FUNCTION__);
2187         return method_do_shutdown_or_sleep(
2188                         m, message,
2189                         SPECIAL_HYBRID_SLEEP_TARGET,
2190                         INHIBIT_SLEEP,
2191                         "org.freedesktop.login1.hibernate",
2192                         "org.freedesktop.login1.hibernate-multiple-sessions",
2193                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2194                         "hybrid-sleep",
2195                         error);
2196 }
2197 #endif // 0
2198
2199 static int method_can_shutdown_or_sleep(
2200                 Manager *m,
2201                 sd_bus_message *message,
2202                 InhibitWhat w,
2203                 const char *action,
2204                 const char *action_multiple_sessions,
2205                 const char *action_ignore_inhibit,
2206                 const char *sleep_verb,
2207                 sd_bus_error *error) {
2208
2209         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2210         bool multiple_sessions, challenge, blocked;
2211         const char *result = NULL;
2212         uid_t uid;
2213         int r;
2214
2215         assert(m);
2216         assert(message);
2217         assert(w >= 0);
2218         assert(w <= _INHIBIT_WHAT_MAX);
2219         assert(action);
2220         assert(action_multiple_sessions);
2221         assert(action_ignore_inhibit);
2222
2223         if (sleep_verb) {
2224 #if 0 /// elogind needs to have the manager being passed
2225                 r = can_sleep(sleep_verb);
2226 #else
2227                 r = can_sleep(m, sleep_verb);
2228 #endif // 0
2229                 if (r < 0)
2230                         return r;
2231                 if (r == 0)
2232                         return sd_bus_reply_method_return(message, "s", "na");
2233         }
2234
2235         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
2236         if (r < 0)
2237                 return r;
2238
2239         r = sd_bus_creds_get_euid(creds, &uid);
2240         if (r < 0)
2241                 return r;
2242
2243         r = have_multiple_sessions(m, uid);
2244         if (r < 0)
2245                 return r;
2246
2247         multiple_sessions = r > 0;
2248         blocked = manager_is_inhibited(m, w, INHIBIT_BLOCK, NULL, false, true, uid, NULL);
2249
2250         if (multiple_sessions) {
2251                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_multiple_sessions, NULL, UID_INVALID, &challenge, error);
2252                 if (r < 0)
2253                         return r;
2254
2255                 if (r > 0)
2256                         result = "yes";
2257                 else if (challenge)
2258                         result = "challenge";
2259                 else
2260                         result = "no";
2261         }
2262
2263         if (blocked) {
2264                 r = bus_test_polkit(message, CAP_SYS_BOOT, action_ignore_inhibit, NULL, UID_INVALID, &challenge, error);
2265                 if (r < 0)
2266                         return r;
2267
2268                 if (r > 0 && !result)
2269                         result = "yes";
2270                 else if (challenge && (!result || streq(result, "yes")))
2271                         result = "challenge";
2272                 else
2273                         result = "no";
2274         }
2275
2276         if (!multiple_sessions && !blocked) {
2277                 /* If neither inhibit nor multiple sessions
2278                  * apply then just check the normal policy */
2279
2280                 r = bus_test_polkit(message, CAP_SYS_BOOT, action, NULL, UID_INVALID, &challenge, error);
2281                 if (r < 0)
2282                         return r;
2283
2284                 if (r > 0)
2285                         result = "yes";
2286                 else if (challenge)
2287                         result = "challenge";
2288                 else
2289                         result = "no";
2290         }
2291
2292         return sd_bus_reply_method_return(message, "s", result);
2293 }
2294
2295 static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2296         Manager *m = userdata;
2297
2298         return method_can_shutdown_or_sleep(
2299                         m, message,
2300                         INHIBIT_SHUTDOWN,
2301                         "org.freedesktop.login1.power-off",
2302                         "org.freedesktop.login1.power-off-multiple-sessions",
2303                         "org.freedesktop.login1.power-off-ignore-inhibit",
2304                         NULL,
2305                         error);
2306 }
2307
2308 static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2309         Manager *m = userdata;
2310
2311         return method_can_shutdown_or_sleep(
2312                         m, message,
2313                         INHIBIT_SHUTDOWN,
2314                         "org.freedesktop.login1.reboot",
2315                         "org.freedesktop.login1.reboot-multiple-sessions",
2316                         "org.freedesktop.login1.reboot-ignore-inhibit",
2317                         NULL,
2318                         error);
2319 }
2320
2321 static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2322         Manager *m = userdata;
2323
2324         return method_can_shutdown_or_sleep(
2325                         m, message,
2326                         INHIBIT_SLEEP,
2327                         "org.freedesktop.login1.suspend",
2328                         "org.freedesktop.login1.suspend-multiple-sessions",
2329                         "org.freedesktop.login1.suspend-ignore-inhibit",
2330                         "suspend",
2331                         error);
2332 }
2333
2334 static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2335         Manager *m = userdata;
2336
2337         return method_can_shutdown_or_sleep(
2338                         m, message,
2339                         INHIBIT_SLEEP,
2340                         "org.freedesktop.login1.hibernate",
2341                         "org.freedesktop.login1.hibernate-multiple-sessions",
2342                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2343                         "hibernate",
2344                         error);
2345 }
2346
2347 static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2348         Manager *m = userdata;
2349
2350         return method_can_shutdown_or_sleep(
2351                         m, message,
2352                         INHIBIT_SLEEP,
2353                         "org.freedesktop.login1.hibernate",
2354                         "org.freedesktop.login1.hibernate-multiple-sessions",
2355                         "org.freedesktop.login1.hibernate-ignore-inhibit",
2356                         "hybrid-sleep",
2357                         error);
2358 }
2359
2360 static int property_get_reboot_to_firmware_setup(
2361                 sd_bus *bus,
2362                 const char *path,
2363                 const char *interface,
2364                 const char *property,
2365                 sd_bus_message *reply,
2366                 void *userdata,
2367                 sd_bus_error *error) {
2368 #if 0 /// elogind does not support EFI
2369         int r;
2370
2371         assert(bus);
2372         assert(reply);
2373         assert(userdata);
2374
2375         r = efi_get_reboot_to_firmware();
2376         if (r < 0 && r != -EOPNOTSUPP)
2377                 return r;
2378
2379         return sd_bus_message_append(reply, "b", r > 0);
2380 #else
2381         return sd_bus_message_append(reply, "b", false);
2382 #endif // 0
2383 }
2384
2385 static int method_set_reboot_to_firmware_setup(
2386                 sd_bus_message *message,
2387                 void *userdata,
2388                 sd_bus_error *error) {
2389
2390         int b, r;
2391         Manager *m = userdata;
2392
2393         assert(message);
2394         assert(m);
2395
2396         r = sd_bus_message_read(message, "b", &b);
2397         if (r < 0)
2398                 return r;
2399
2400         r = bus_verify_polkit_async(message,
2401                                     CAP_SYS_ADMIN,
2402                                     "org.freedesktop.login1.set-reboot-to-firmware-setup",
2403                                     NULL,
2404                                     false,
2405                                     UID_INVALID,
2406                                     &m->polkit_registry,
2407                                     error);
2408         if (r < 0)
2409                 return r;
2410         if (r == 0)
2411                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2412
2413 #if 0 /// elogind does not support EFI
2414         r = efi_set_reboot_to_firmware(b);
2415         if (r < 0)
2416                 return r;
2417 #endif // 0
2418
2419         return sd_bus_reply_method_return(message, NULL);
2420 }
2421
2422 static int method_can_reboot_to_firmware_setup(
2423                 sd_bus_message *message,
2424                 void *userdata,
2425                 sd_bus_error *error) {
2426
2427 #if 0 /// elogind does not support EFI
2428         int r;
2429         bool challenge;
2430         const char *result;
2431         Manager *m = userdata;
2432
2433         assert(message);
2434         assert(m);
2435
2436         r = efi_reboot_to_firmware_supported();
2437         if (r == -EOPNOTSUPP)
2438                 return sd_bus_reply_method_return(message, "s", "na");
2439         else if (r < 0)
2440                 return r;
2441
2442         r = bus_test_polkit(message,
2443                             CAP_SYS_ADMIN,
2444                             "org.freedesktop.login1.set-reboot-to-firmware-setup",
2445                             NULL,
2446                             UID_INVALID,
2447                             &challenge,
2448                             error);
2449         if (r < 0)
2450                 return r;
2451
2452         if (r > 0)
2453                 result = "yes";
2454         else if (challenge)
2455                 result = "challenge";
2456         else
2457                 result = "no";
2458
2459         return sd_bus_reply_method_return(message, "s", result);
2460 #else
2461         return sd_bus_reply_method_return(message, "s", "no");
2462 #endif // 0
2463 }
2464
2465 static int method_set_wall_message(
2466                 sd_bus_message *message,
2467                 void *userdata,
2468                 sd_bus_error *error) {
2469
2470         int r;
2471         Manager *m = userdata;
2472         char *wall_message;
2473         int enable_wall_messages;
2474
2475         assert(message);
2476         assert(m);
2477
2478         r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages);
2479         if (r < 0)
2480                 return r;
2481
2482 #if 0 /// elogind only calls this for shutdown/reboot, which already needs authorization.
2483         r = bus_verify_polkit_async(message,
2484                                     CAP_SYS_ADMIN,
2485                                     "org.freedesktop.login1.set-wall-message",
2486                                     NULL,
2487                                     false,
2488                                     UID_INVALID,
2489                                     &m->polkit_registry,
2490                                     error);
2491         if (r < 0)
2492                 return r;
2493         if (r == 0)
2494                 return 1; /* Will call us back */
2495 #endif // 0
2496
2497         r = free_and_strdup(&m->wall_message, empty_to_null(wall_message));
2498         if (r < 0)
2499                 return log_oom();
2500
2501         m->enable_wall_messages = enable_wall_messages;
2502
2503         return sd_bus_reply_method_return(message, NULL);
2504 }
2505
2506 static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2507         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
2508         const char *who, *why, *what, *mode;
2509         _cleanup_free_ char *id = NULL;
2510         _cleanup_close_ int fifo_fd = -1;
2511         Manager *m = userdata;
2512         Inhibitor *i = NULL;
2513         InhibitMode mm;
2514         InhibitWhat w;
2515         pid_t pid;
2516         uid_t uid;
2517         int r;
2518
2519         assert(message);
2520         assert(m);
2521
2522         r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode);
2523         if (r < 0)
2524                 return r;
2525
2526         w = inhibit_what_from_string(what);
2527         if (w <= 0)
2528                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what);
2529
2530         mm = inhibit_mode_from_string(mode);
2531         if (mm < 0)
2532                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode);
2533
2534         /* Delay is only supported for shutdown/sleep */
2535         if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP)))
2536                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep");
2537
2538         /* Don't allow taking delay locks while we are already
2539          * executing the operation. We shouldn't create the impression
2540          * that the lock was successful if the machine is about to go
2541          * down/suspend any moment. */
2542         if (m->action_what & w)
2543                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running");
2544
2545         r = bus_verify_polkit_async(
2546                         message,
2547                         CAP_SYS_BOOT,
2548                         w == INHIBIT_SHUTDOWN             ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") :
2549                         w == INHIBIT_SLEEP                ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep"    : "org.freedesktop.login1.inhibit-delay-sleep") :
2550                         w == INHIBIT_IDLE                 ? "org.freedesktop.login1.inhibit-block-idle" :
2551                         w == INHIBIT_HANDLE_POWER_KEY     ? "org.freedesktop.login1.inhibit-handle-power-key" :
2552                         w == INHIBIT_HANDLE_SUSPEND_KEY   ? "org.freedesktop.login1.inhibit-handle-suspend-key" :
2553                         w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" :
2554                                                             "org.freedesktop.login1.inhibit-handle-lid-switch",
2555                         NULL,
2556                         false,
2557                         UID_INVALID,
2558                         &m->polkit_registry,
2559                         error);
2560         if (r < 0)
2561                 return r;
2562         if (r == 0)
2563                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
2564
2565         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds);
2566         if (r < 0)
2567                 return r;
2568
2569         r = sd_bus_creds_get_euid(creds, &uid);
2570         if (r < 0)
2571                 return r;
2572
2573         r = sd_bus_creds_get_pid(creds, &pid);
2574         if (r < 0)
2575                 return r;
2576
2577         if (hashmap_size(m->inhibitors) >= m->inhibitors_max)
2578                 return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max);
2579
2580         do {
2581                 id = mfree(id);
2582
2583                 if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0)
2584                         return -ENOMEM;
2585
2586         } while (hashmap_get(m->inhibitors, id));
2587
2588         r = manager_add_inhibitor(m, id, &i);
2589         if (r < 0)
2590                 return r;
2591
2592         i->what = w;
2593         i->mode = mm;
2594         i->pid = pid;
2595         i->uid = uid;
2596         i->why = strdup(why);
2597         i->who = strdup(who);
2598
2599         if (!i->why || !i->who) {
2600                 r = -ENOMEM;
2601                 goto fail;
2602         }
2603
2604         fifo_fd = inhibitor_create_fifo(i);
2605         if (fifo_fd < 0) {
2606                 r = fifo_fd;
2607                 goto fail;
2608         }
2609
2610         inhibitor_start(i);
2611
2612         return sd_bus_reply_method_return(message, "h", fifo_fd);
2613
2614 fail:
2615         if (i)
2616                 inhibitor_free(i);
2617
2618         return r;
2619 }
2620
2621 const sd_bus_vtable manager_vtable[] = {
2622         SD_BUS_VTABLE_START(0),
2623
2624         SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
2625         SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
2626
2627 #if 0 /// UNNEEDED by elogind
2628         SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
2629 #endif // 0
2630         SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
2631         SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
2632         SD_BUS_PROPERTY("KillUserProcesses", "b", NULL, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST),
2633         SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, SD_BUS_VTABLE_PROPERTY_CONST),
2634         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2635         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2636         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2637         SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2638         SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
2639         SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST),
2640         SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST),
2641         SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST),
2642         SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST),
2643         SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST),
2644         SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST),
2645         SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2646         SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST),
2647         SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST),
2648         SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0),
2649         SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0),
2650         SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0),
2651         SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0),
2652         SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST),
2653         SD_BUS_PROPERTY("RuntimeDirectorySize", "t", bus_property_get_size, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST),
2654         SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST),
2655         SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_current_inhibitors, 0, 0),
2656         SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST),
2657         SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_current_sessions, 0, 0),
2658         SD_BUS_PROPERTY("UserTasksMax", "t", NULL, offsetof(Manager, user_tasks_max), SD_BUS_VTABLE_PROPERTY_CONST),
2659
2660         SD_BUS_METHOD("GetSession", "s", "o", method_get_session, SD_BUS_VTABLE_UNPRIVILEGED),
2661         SD_BUS_METHOD("GetSessionByPID", "u", "o", method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2662         SD_BUS_METHOD("GetUser", "u", "o", method_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
2663         SD_BUS_METHOD("GetUserByPID", "u", "o", method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED),
2664         SD_BUS_METHOD("GetSeat", "s", "o", method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2665         SD_BUS_METHOD("ListSessions", NULL, "a(susso)", method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2666         SD_BUS_METHOD("ListUsers", NULL, "a(uso)", method_list_users, SD_BUS_VTABLE_UNPRIVILEGED),
2667         SD_BUS_METHOD("ListSeats", NULL, "a(so)", method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED),
2668         SD_BUS_METHOD("ListInhibitors", NULL, "a(ssssuu)", method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED),
2669         SD_BUS_METHOD("CreateSession", "uusssssussbssa(sv)", "soshusub", method_create_session, 0),
2670         SD_BUS_METHOD("ReleaseSession", "s", NULL, method_release_session, 0),
2671         SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2672         SD_BUS_METHOD("ActivateSessionOnSeat", "ss", NULL, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2673         SD_BUS_METHOD("LockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2674         SD_BUS_METHOD("UnlockSession", "s", NULL, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED),
2675         SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2676         SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED),
2677         SD_BUS_METHOD("KillSession", "ssi", NULL, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED),
2678         SD_BUS_METHOD("KillUser", "ui", NULL, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED),
2679         SD_BUS_METHOD("TerminateSession", "s", NULL, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED),
2680         SD_BUS_METHOD("TerminateUser", "u", NULL, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED),
2681         SD_BUS_METHOD("TerminateSeat", "s", NULL, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED),
2682         SD_BUS_METHOD("SetUserLinger", "ubb", NULL, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED),
2683         SD_BUS_METHOD("AttachDevice", "ssb", NULL, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED),
2684         SD_BUS_METHOD("FlushDevices", "b", NULL, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED),
2685         SD_BUS_METHOD("PowerOff", "b", NULL, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2686         SD_BUS_METHOD("Reboot", "b", NULL, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2687         SD_BUS_METHOD("Suspend", "b", NULL, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2688         SD_BUS_METHOD("Hibernate", "b", NULL, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2689         SD_BUS_METHOD("HybridSleep", "b", NULL, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2690         SD_BUS_METHOD("CanPowerOff", NULL, "s", method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED),
2691         SD_BUS_METHOD("CanReboot", NULL, "s", method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED),
2692         SD_BUS_METHOD("CanSuspend", NULL, "s", method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED),
2693         SD_BUS_METHOD("CanHibernate", NULL, "s", method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED),
2694         SD_BUS_METHOD("CanHybridSleep", NULL, "s", method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED),
2695         SD_BUS_METHOD("ScheduleShutdown", "st", NULL, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2696         SD_BUS_METHOD("CancelScheduledShutdown", NULL, "b", method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED),
2697         SD_BUS_METHOD("Inhibit", "ssss", "h", method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED),
2698         SD_BUS_METHOD("CanRebootToFirmwareSetup", NULL, "s", method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2699         SD_BUS_METHOD("SetRebootToFirmwareSetup", "b", NULL, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED),
2700         SD_BUS_METHOD("SetWallMessage", "sb", NULL, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED),
2701
2702         SD_BUS_SIGNAL("SessionNew", "so", 0),
2703         SD_BUS_SIGNAL("SessionRemoved", "so", 0),
2704         SD_BUS_SIGNAL("UserNew", "uo", 0),
2705         SD_BUS_SIGNAL("UserRemoved", "uo", 0),
2706         SD_BUS_SIGNAL("SeatNew", "so", 0),
2707         SD_BUS_SIGNAL("SeatRemoved", "so", 0),
2708         SD_BUS_SIGNAL("PrepareForShutdown", "b", 0),
2709         SD_BUS_SIGNAL("PrepareForSleep", "b", 0),
2710
2711         SD_BUS_VTABLE_END
2712 };
2713
2714 #if 0 /// UNNEEDED by elogind
2715 static int session_jobs_reply(Session *s, const char *unit, const char *result) {
2716         int r = 0;
2717
2718         assert(s);
2719         assert(unit);
2720
2721         if (!s->started)
2722                 return r;
2723
2724         if (streq(result, "done"))
2725                 r = session_send_create_reply(s, NULL);
2726         else {
2727                 _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
2728
2729                 sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Start job for unit %s failed with '%s'", unit, result);
2730                 r = session_send_create_reply(s, &e);
2731         }
2732
2733         return r;
2734 }
2735
2736 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2737         const char *path, *result, *unit;
2738         Manager *m = userdata;
2739         Session *session;
2740         uint32_t id;
2741         User *user;
2742         int r;
2743
2744         assert(message);
2745         assert(m);
2746
2747         r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result);
2748         if (r < 0) {
2749                 bus_log_parse_error(r);
2750                 return 0;
2751         }
2752
2753         if (m->action_job && streq(m->action_job, path)) {
2754                 log_info("Operation '%s' finished.", inhibit_what_to_string(m->action_what));
2755
2756                 /* Tell people that they now may take a lock again */
2757                 send_prepare_for(m, m->action_what, false);
2758
2759                 m->action_job = mfree(m->action_job);
2760                 m->action_unit = NULL;
2761                 m->action_what = 0;
2762                 return 0;
2763         }
2764
2765         session = hashmap_get(m->session_units, unit);
2766         if (session && streq_ptr(path, session->scope_job)) {
2767                 session->scope_job = mfree(session->scope_job);
2768                 session_jobs_reply(session, unit, result);
2769
2770                 session_save(session);
2771                 user_save(session->user);
2772                 session_add_to_gc_queue(session);
2773         }
2774
2775         user = hashmap_get(m->user_units, unit);
2776         if (user &&
2777             (streq_ptr(path, user->service_job) ||
2778              streq_ptr(path, user->slice_job))) {
2779
2780                 if (streq_ptr(path, user->service_job))
2781                         user->service_job = mfree(user->service_job);
2782
2783                 if (streq_ptr(path, user->slice_job))
2784                         user->slice_job = mfree(user->slice_job);
2785
2786                 LIST_FOREACH(sessions_by_user, session, user->sessions)
2787                         session_jobs_reply(session, unit, result);
2788
2789                 user_save(user);
2790                 user_add_to_gc_queue(user);
2791         }
2792
2793         return 0;
2794 }
2795
2796 int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2797         const char *path, *unit;
2798         Manager *m = userdata;
2799         Session *session;
2800         User *user;
2801         int r;
2802
2803         assert(message);
2804         assert(m);
2805
2806         r = sd_bus_message_read(message, "so", &unit, &path);
2807         if (r < 0) {
2808                 bus_log_parse_error(r);
2809                 return 0;
2810         }
2811
2812         session = hashmap_get(m->session_units, unit);
2813         if (session)
2814                 session_add_to_gc_queue(session);
2815
2816         user = hashmap_get(m->user_units, unit);
2817         if (user)
2818                 user_add_to_gc_queue(user);
2819
2820         return 0;
2821 }
2822
2823 int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2824         _cleanup_free_ char *unit = NULL;
2825         Manager *m = userdata;
2826         const char *path;
2827         Session *session;
2828         User *user;
2829         int r;
2830
2831         assert(message);
2832         assert(m);
2833
2834         path = sd_bus_message_get_path(message);
2835         if (!path)
2836                 return 0;
2837
2838         r = unit_name_from_dbus_path(path, &unit);
2839         if (r == -EINVAL) /* not a unit */
2840                 return 0;
2841         if (r < 0) {
2842                 log_oom();
2843                 return 0;
2844         }
2845
2846         session = hashmap_get(m->session_units, unit);
2847         if (session)
2848                 session_add_to_gc_queue(session);
2849
2850         user = hashmap_get(m->user_units, unit);
2851         if (user)
2852                 user_add_to_gc_queue(user);
2853
2854         return 0;
2855 }
2856
2857 int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) {
2858         Manager *m = userdata;
2859         Session *session;
2860         Iterator i;
2861         int b, r;
2862
2863         assert(message);
2864         assert(m);
2865
2866         r = sd_bus_message_read(message, "b", &b);
2867         if (r < 0) {
2868                 bus_log_parse_error(r);
2869                 return 0;
2870         }
2871
2872         if (b)
2873                 return 0;
2874
2875         /* systemd finished reloading, let's recheck all our sessions */
2876         log_debug("System manager has been reloaded, rechecking sessions...");
2877
2878         HASHMAP_FOREACH(session, m->sessions, i)
2879                 session_add_to_gc_queue(session);
2880
2881         return 0;
2882 }
2883 #endif // 0
2884
2885 int manager_send_changed(Manager *manager, const char *property, ...) {
2886         char **l;
2887
2888         assert(manager);
2889
2890         l = strv_from_stdarg_alloca(property);
2891
2892         return sd_bus_emit_properties_changed_strv(
2893                         manager->bus,
2894                         "/org/freedesktop/login1",
2895                         "org.freedesktop.login1.Manager",
2896                         l);
2897 }
2898
2899 #if 0 /// UNNEEDED by elogind
2900 static int strdup_job(sd_bus_message *reply, char **job) {
2901         const char *j;
2902         char *copy;
2903         int r;
2904
2905         r = sd_bus_message_read(reply, "o", &j);
2906         if (r < 0)
2907                 return r;
2908
2909         copy = strdup(j);
2910         if (!copy)
2911                 return -ENOMEM;
2912
2913         *job = copy;
2914         return 1;
2915 }
2916
2917 int manager_start_slice(
2918                 Manager *manager,
2919                 const char *slice,
2920                 const char *description,
2921                 const char *after,
2922                 const char *after2,
2923                 uint64_t tasks_max,
2924                 sd_bus_error *error,
2925                 char **job) {
2926
2927         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
2928         int r;
2929
2930         assert(manager);
2931         assert(slice);
2932         assert(job);
2933
2934         r = sd_bus_message_new_method_call(
2935                         manager->bus,
2936                         &m,
2937                         "org.freedesktop.systemd1",
2938                         "/org/freedesktop/systemd1",
2939                         "org.freedesktop.systemd1.Manager",
2940                         "StartTransientUnit");
2941         if (r < 0)
2942                 return r;
2943
2944         r = sd_bus_message_append(m, "ss", strempty(slice), "fail");
2945         if (r < 0)
2946                 return r;
2947
2948         r = sd_bus_message_open_container(m, 'a', "(sv)");
2949         if (r < 0)
2950                 return r;
2951
2952         if (!isempty(description)) {
2953                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
2954                 if (r < 0)
2955                         return r;
2956         }
2957
2958         if (!isempty(after)) {
2959                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
2960                 if (r < 0)
2961                         return r;
2962         }
2963
2964         if (!isempty(after2)) {
2965                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
2966                 if (r < 0)
2967                         return r;
2968         }
2969
2970         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
2971         if (r < 0)
2972                 return r;
2973
2974         r = sd_bus_message_close_container(m);
2975         if (r < 0)
2976                 return r;
2977
2978         r = sd_bus_message_append(m, "a(sa(sv))", 0);
2979         if (r < 0)
2980                 return r;
2981
2982         r = sd_bus_call(manager->bus, m, 0, error, &reply);
2983         if (r < 0)
2984                 return r;
2985
2986         return strdup_job(reply, job);
2987 }
2988
2989 int manager_start_scope(
2990                 Manager *manager,
2991                 const char *scope,
2992                 pid_t pid,
2993                 const char *slice,
2994                 const char *description,
2995                 const char *after,
2996                 const char *after2,
2997                 uint64_t tasks_max,
2998                 sd_bus_error *error,
2999                 char **job) {
3000
3001         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
3002         int r;
3003
3004         assert(manager);
3005         assert(scope);
3006         assert(pid > 1);
3007         assert(job);
3008
3009         r = sd_bus_message_new_method_call(
3010                         manager->bus,
3011                         &m,
3012                         "org.freedesktop.systemd1",
3013                         "/org/freedesktop/systemd1",
3014                         "org.freedesktop.systemd1.Manager",
3015                         "StartTransientUnit");
3016         if (r < 0)
3017                 return r;
3018
3019         r = sd_bus_message_append(m, "ss", strempty(scope), "fail");
3020         if (r < 0)
3021                 return r;
3022
3023         r = sd_bus_message_open_container(m, 'a', "(sv)");
3024         if (r < 0)
3025                 return r;
3026
3027         if (!isempty(slice)) {
3028                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
3029                 if (r < 0)
3030                         return r;
3031         }
3032
3033         if (!isempty(description)) {
3034                 r = sd_bus_message_append(m, "(sv)", "Description", "s", description);
3035                 if (r < 0)
3036                         return r;
3037         }
3038
3039         if (!isempty(after)) {
3040                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after);
3041                 if (r < 0)
3042                         return r;
3043         }
3044
3045         if (!isempty(after2)) {
3046                 r = sd_bus_message_append(m, "(sv)", "After", "as", 1, after2);
3047                 if (r < 0)
3048                         return r;
3049         }
3050
3051         /* cgroup empty notification is not available in containers
3052          * currently. To make this less problematic, let's shorten the
3053          * stop timeout for sessions, so that we don't wait
3054          * forever. */
3055
3056         /* Make sure that the session shells are terminated with
3057          * SIGHUP since bash and friends tend to ignore SIGTERM */
3058         r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true);
3059         if (r < 0)
3060                 return r;
3061
3062         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
3063         if (r < 0)
3064                 return r;
3065
3066         r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", tasks_max);
3067         if (r < 0)
3068                 return r;
3069
3070         r = sd_bus_message_close_container(m);
3071         if (r < 0)
3072                 return r;
3073
3074         r = sd_bus_message_append(m, "a(sa(sv))", 0);
3075         if (r < 0)
3076                 return r;
3077
3078         r = sd_bus_call(manager->bus, m, 0, error, &reply);
3079         if (r < 0)
3080                 return r;
3081
3082         return strdup_job(reply, job);
3083 }
3084
3085 int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3086         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3087         int r;
3088
3089         assert(manager);
3090         assert(unit);
3091         assert(job);
3092
3093         r = sd_bus_call_method(
3094                         manager->bus,
3095                         "org.freedesktop.systemd1",
3096                         "/org/freedesktop/systemd1",
3097                         "org.freedesktop.systemd1.Manager",
3098                         "StartUnit",
3099                         error,
3100                         &reply,
3101                         "ss", unit, "replace");
3102         if (r < 0)
3103                 return r;
3104
3105         return strdup_job(reply, job);
3106 }
3107
3108 int manager_stop_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) {
3109         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3110         int r;
3111
3112         assert(manager);
3113         assert(unit);
3114         assert(job);
3115
3116         r = sd_bus_call_method(
3117                         manager->bus,
3118                         "org.freedesktop.systemd1",
3119                         "/org/freedesktop/systemd1",
3120                         "org.freedesktop.systemd1.Manager",
3121                         "StopUnit",
3122                         error,
3123                         &reply,
3124                         "ss", unit, "fail");
3125         if (r < 0) {
3126                 if (sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) ||
3127                     sd_bus_error_has_name(error, BUS_ERROR_LOAD_FAILED)) {
3128
3129                         *job = NULL;
3130                         sd_bus_error_free(error);
3131                         return 0;
3132                 }
3133
3134                 return r;
3135         }
3136
3137         return strdup_job(reply, job);
3138 }
3139
3140 int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *error) {
3141         _cleanup_free_ char *path = NULL;
3142         int r;
3143
3144         assert(manager);
3145         assert(scope);
3146
3147         path = unit_dbus_path_from_name(scope);
3148         if (!path)
3149                 return -ENOMEM;
3150
3151         r = sd_bus_call_method(
3152                         manager->bus,
3153                         "org.freedesktop.systemd1",
3154                         path,
3155                         "org.freedesktop.systemd1.Scope",
3156                         "Abandon",
3157                         error,
3158                         NULL,
3159                         NULL);
3160         if (r < 0) {
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                     sd_bus_error_has_name(error, BUS_ERROR_SCOPE_NOT_RUNNING)) {
3164                         sd_bus_error_free(error);
3165                         return 0;
3166                 }
3167
3168                 return r;
3169         }
3170
3171         return 1;
3172 }
3173
3174 int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) {
3175         assert(manager);
3176         assert(unit);
3177
3178         return sd_bus_call_method(
3179                         manager->bus,
3180                         "org.freedesktop.systemd1",
3181                         "/org/freedesktop/systemd1",
3182                         "org.freedesktop.systemd1.Manager",
3183                         "KillUnit",
3184                         error,
3185                         NULL,
3186                         "ssi", unit, who == KILL_LEADER ? "main" : "all", signo);
3187 }
3188
3189 int manager_unit_is_active(Manager *manager, const char *unit) {
3190         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3191         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3192         _cleanup_free_ char *path = NULL;
3193         const char *state;
3194         int r;
3195
3196         assert(manager);
3197         assert(unit);
3198
3199         path = unit_dbus_path_from_name(unit);
3200         if (!path)
3201                 return -ENOMEM;
3202
3203         r = sd_bus_get_property(
3204                         manager->bus,
3205                         "org.freedesktop.systemd1",
3206                         path,
3207                         "org.freedesktop.systemd1.Unit",
3208                         "ActiveState",
3209                         &error,
3210                         &reply,
3211                         "s");
3212         if (r < 0) {
3213                 /* systemd might have droppped off momentarily, let's
3214                  * not make this an error */
3215                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3216                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3217                         return true;
3218
3219                 /* If the unit is already unloaded then it's not
3220                  * active */
3221                 if (sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT) ||
3222                     sd_bus_error_has_name(&error, BUS_ERROR_LOAD_FAILED))
3223                         return false;
3224
3225                 return r;
3226         }
3227
3228         r = sd_bus_message_read(reply, "s", &state);
3229         if (r < 0)
3230                 return -EINVAL;
3231
3232         return !streq(state, "inactive") && !streq(state, "failed");
3233 }
3234
3235 int manager_job_is_active(Manager *manager, const char *path) {
3236         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
3237         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
3238         int r;
3239
3240         assert(manager);
3241         assert(path);
3242
3243         r = sd_bus_get_property(
3244                         manager->bus,
3245                         "org.freedesktop.systemd1",
3246                         path,
3247                         "org.freedesktop.systemd1.Job",
3248                         "State",
3249                         &error,
3250                         &reply,
3251                         "s");
3252         if (r < 0) {
3253                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_NO_REPLY) ||
3254                     sd_bus_error_has_name(&error, SD_BUS_ERROR_DISCONNECTED))
3255                         return true;
3256
3257                 if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT))
3258                         return false;
3259
3260                 return r;
3261         }
3262
3263         /* We don't actually care about the state really. The fact
3264          * that we could read the job state is enough for us */
3265
3266         return true;
3267 }
3268 #endif // 0