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