src/login/logind-session-dbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright 2011 Lennart Poettering
   4 ***/
   5
   6 #include <errno.h>
   7 #include <string.h>
   8
   9 #include "alloc-util.h"
  10 #include "bus-common-errors.h"
  11 #include "bus-label.h"
  12 #include "bus-util.h"
  13 #include "fd-util.h"
  14 #include "logind-session-device.h"
  15 #include "logind-session.h"
  16 #include "logind.h"
  17 #include "signal-util.h"
  18 #include "strv.h"
  19 #include "util.h"
  20
  21 static int property_get_user(
  22                 sd_bus *bus,
  23                 const char *path,
  24                 const char *interface,
  25                 const char *property,
  26                 sd_bus_message *reply,
  27                 void *userdata,
  28                 sd_bus_error *error) {
  29
  30         _cleanup_free_ char *p = NULL;
  31         Session *s = userdata;
  32
  33         assert(bus);
  34         assert(reply);
  35         assert(s);
  36
  37         p = user_bus_path(s->user);
  38         if (!p)
  39                 return -ENOMEM;
  40
  41         return sd_bus_message_append(reply, "(uo)", (uint32_t) s->user->uid, p);
  42 }
  43
  44 static int property_get_name(
  45                 sd_bus *bus,
  46                 const char *path,
  47                 const char *interface,
  48                 const char *property,
  49                 sd_bus_message *reply,
  50                 void *userdata,
  51                 sd_bus_error *error) {
  52
  53         Session *s = userdata;
  54
  55         assert(bus);
  56         assert(reply);
  57         assert(s);
  58
  59         return sd_bus_message_append(reply, "s", s->user->name);
  60 }
  61
  62 static int property_get_seat(
  63                 sd_bus *bus,
  64                 const char *path,
  65                 const char *interface,
  66                 const char *property,
  67                 sd_bus_message *reply,
  68                 void *userdata,
  69                 sd_bus_error *error) {
  70
  71         _cleanup_free_ char *p = NULL;
  72         Session *s = userdata;
  73
  74         assert(bus);
  75         assert(reply);
  76         assert(s);
  77
  78         p = s->seat ? seat_bus_path(s->seat) : strdup("/");
  79         if (!p)
  80                 return -ENOMEM;
  81
  82         return sd_bus_message_append(reply, "(so)", s->seat ? s->seat->id : "", p);
  83 }
  84
  85 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, session_type, SessionType);
  86 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_class, session_class, SessionClass);
  87 static BUS_DEFINE_PROPERTY_GET(property_get_active, "b", Session, session_is_active);
  88 static BUS_DEFINE_PROPERTY_GET2(property_get_state, "s", Session, session_get_state, session_state_to_string);
  89
  90 static int property_get_idle_hint(
  91                 sd_bus *bus,
  92                 const char *path,
  93                 const char *interface,
  94                 const char *property,
  95                 sd_bus_message *reply,
  96                 void *userdata,
  97                 sd_bus_error *error) {
  98
  99         Session *s = userdata;
 100
 101         assert(bus);
 102         assert(reply);
 103         assert(s);
 104
 105         return sd_bus_message_append(reply, "b", session_get_idle_hint(s, NULL) > 0);
 106 }
 107
 108 static int property_get_idle_since_hint(
 109                 sd_bus *bus,
 110                 const char *path,
 111                 const char *interface,
 112                 const char *property,
 113                 sd_bus_message *reply,
 114                 void *userdata,
 115                 sd_bus_error *error) {
 116
 117         Session *s = userdata;
 118         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 119         uint64_t u;
 120         int r;
 121
 122         assert(bus);
 123         assert(reply);
 124         assert(s);
 125
 126         r = session_get_idle_hint(s, &t);
 127         if (r < 0)
 128                 return r;
 129
 130         u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
 131
 132         return sd_bus_message_append(reply, "t", u);
 133 }
 134
 135 static int property_get_locked_hint(
 136                 sd_bus *bus,
 137                 const char *path,
 138                 const char *interface,
 139                 const char *property,
 140                 sd_bus_message *reply,
 141                 void *userdata,
 142                 sd_bus_error *error) {
 143
 144         Session *s = userdata;
 145
 146         assert(bus);
 147         assert(reply);
 148         assert(s);
 149
 150         return sd_bus_message_append(reply, "b", session_get_locked_hint(s) > 0);
 151 }
 152
 153 int bus_session_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 154         Session *s = userdata;
 155         int r;
 156
 157         assert(message);
 158         assert(s);
 159
 160         r = bus_verify_polkit_async(
 161                         message,
 162                         CAP_KILL,
 163                         "org.freedesktop.login1.manage",
 164                         NULL,
 165                         false,
 166                         s->user->uid,
 167                         &s->manager->polkit_registry,
 168                         error);
 169         if (r < 0)
 170                 return r;
 171         if (r == 0)
 172                 return 1; /* Will call us back */
 173
 174         r = session_stop(s, true);
 175         if (r < 0)
 176                 return r;
 177
 178         return sd_bus_reply_method_return(message, NULL);
 179 }
 180
 181 int bus_session_method_activate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 182         Session *s = userdata;
 183         int r;
 184
 185         assert(message);
 186         assert(s);
 187
 188         r = session_activate(s);
 189         if (r < 0)
 190                 return r;
 191
 192         return sd_bus_reply_method_return(message, NULL);
 193 }
 194
 195 int bus_session_method_lock(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 196         Session *s = userdata;
 197         int r;
 198
 199         assert(message);
 200         assert(s);
 201
 202         r = bus_verify_polkit_async(
 203                         message,
 204                         CAP_SYS_ADMIN,
 205                         "org.freedesktop.login1.lock-sessions",
 206                         NULL,
 207                         false,
 208                         s->user->uid,
 209                         &s->manager->polkit_registry,
 210                         error);
 211         if (r < 0)
 212                 return r;
 213         if (r == 0)
 214                 return 1; /* Will call us back */
 215
 216         r = session_send_lock(s, strstr(sd_bus_message_get_member(message), "Lock"));
 217         if (r < 0)
 218                 return r;
 219
 220         return sd_bus_reply_method_return(message, NULL);
 221 }
 222
 223 static int method_set_idle_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 224         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 225         Session *s = userdata;
 226         uid_t uid;
 227         int r, b;
 228
 229         assert(message);
 230         assert(s);
 231
 232         r = sd_bus_message_read(message, "b", &b);
 233         if (r < 0)
 234                 return r;
 235
 236         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
 237         if (r < 0)
 238                 return r;
 239
 240         r = sd_bus_creds_get_euid(creds, &uid);
 241         if (r < 0)
 242                 return r;
 243
 244         if (uid != 0 && uid != s->user->uid)
 245                 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set idle hint");
 246
 247         session_set_idle_hint(s, b);
 248
 249         return sd_bus_reply_method_return(message, NULL);
 250 }
 251
 252 static int method_set_locked_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 253         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 254         Session *s = userdata;
 255         uid_t uid;
 256         int r, b;
 257
 258         assert(message);
 259         assert(s);
 260
 261         r = sd_bus_message_read(message, "b", &b);
 262         if (r < 0)
 263                 return r;
 264
 265         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
 266         if (r < 0)
 267                 return r;
 268
 269         r = sd_bus_creds_get_euid(creds, &uid);
 270         if (r < 0)
 271                 return r;
 272
 273         if (uid != 0 && uid != s->user->uid)
 274                 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set locked hint");
 275
 276         session_set_locked_hint(s, b);
 277
 278         return sd_bus_reply_method_return(message, NULL);
 279 }
 280
 281 int bus_session_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 282         Session *s = userdata;
 283         const char *swho;
 284         int32_t signo;
 285         KillWho who;
 286         int r;
 287
 288         assert(message);
 289         assert(s);
 290
 291         r = sd_bus_message_read(message, "si", &swho, &signo);
 292         if (r < 0)
 293                 return r;
 294
 295         if (isempty(swho))
 296                 who = KILL_ALL;
 297         else {
 298                 who = kill_who_from_string(swho);
 299                 if (who < 0)
 300                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho);
 301         }
 302
 303         if (!SIGNAL_VALID(signo))
 304                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo);
 305
 306         r = bus_verify_polkit_async(
 307                         message,
 308                         CAP_KILL,
 309                         "org.freedesktop.login1.manage",
 310                         NULL,
 311                         false,
 312                         s->user->uid,
 313                         &s->manager->polkit_registry,
 314                         error);
 315         if (r < 0)
 316                 return r;
 317         if (r == 0)
 318                 return 1; /* Will call us back */
 319
 320         r = session_kill(s, who, signo);
 321         if (r < 0)
 322                 return r;
 323
 324         return sd_bus_reply_method_return(message, NULL);
 325 }
 326
 327 static int method_take_control(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 328         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 329         Session *s = userdata;
 330         int r, force;
 331         uid_t uid;
 332
 333         assert(message);
 334         assert(s);
 335
 336         r = sd_bus_message_read(message, "b", &force);
 337         if (r < 0)
 338                 return r;
 339
 340         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
 341         if (r < 0)
 342                 return r;
 343
 344         r = sd_bus_creds_get_euid(creds, &uid);
 345         if (r < 0)
 346                 return r;
 347
 348         if (uid != 0 && (force || uid != s->user->uid))
 349                 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may take control");
 350
 351         r = session_set_controller(s, sd_bus_message_get_sender(message), force, true);
 352         if (r < 0)
 353                 return r;
 354
 355         return sd_bus_reply_method_return(message, NULL);
 356 }
 357
 358 static int method_release_control(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 359         Session *s = userdata;
 360
 361         assert(message);
 362         assert(s);
 363
 364         if (!session_is_controller(s, sd_bus_message_get_sender(message)))
 365                 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
 366
 367         session_drop_controller(s);
 368
 369         return sd_bus_reply_method_return(message, NULL);
 370 }
 371
 372 static int method_take_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 373         Session *s = userdata;
 374         uint32_t major, minor;
 375         SessionDevice *sd;
 376         dev_t dev;
 377         int r;
 378
 379         assert(message);
 380         assert(s);
 381
 382         r = sd_bus_message_read(message, "uu", &major, &minor);
 383         if (r < 0)
 384                 return r;
 385
 386         if (!session_is_controller(s, sd_bus_message_get_sender(message)))
 387                 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
 388
 389         dev = makedev(major, minor);
 390         sd = hashmap_get(s->devices, &dev);
 391         if (sd)
 392                 /* We don't allow retrieving a device multiple times.
 393                  * The related ReleaseDevice call is not ref-counted.
 394                  * The caller should use dup() if it requires more
 395                  * than one fd (it would be functionally
 396                  * equivalent). */
 397                 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_IS_TAKEN, "Device already taken");
 398
 399         r = session_device_new(s, dev, true, &sd);
 400         if (r < 0)
 401                 return r;
 402
 403         r = session_device_save(sd);
 404         if (r < 0)
 405                 goto error;
 406
 407         r = sd_bus_reply_method_return(message, "hb", sd->fd, !sd->active);
 408         if (r < 0)
 409                 goto error;
 410
 411         session_save(s);
 412         return 1;
 413
 414 error:
 415         session_device_free(sd);
 416         return r;
 417 }
 418
 419 static int method_release_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 420         Session *s = userdata;
 421         uint32_t major, minor;
 422         SessionDevice *sd;
 423         dev_t dev;
 424         int r;
 425
 426         assert(message);
 427         assert(s);
 428
 429         r = sd_bus_message_read(message, "uu", &major, &minor);
 430         if (r < 0)
 431                 return r;
 432
 433         if (!session_is_controller(s, sd_bus_message_get_sender(message)))
 434                 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
 435
 436         dev = makedev(major, minor);
 437         sd = hashmap_get(s->devices, &dev);
 438         if (!sd)
 439                 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken");
 440
 441         session_device_free(sd);
 442         session_save(s);
 443
 444         return sd_bus_reply_method_return(message, NULL);
 445 }
 446
 447 static int method_pause_device_complete(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 448         Session *s = userdata;
 449         uint32_t major, minor;
 450         SessionDevice *sd;
 451         dev_t dev;
 452         int r;
 453
 454         assert(message);
 455         assert(s);
 456
 457         r = sd_bus_message_read(message, "uu", &major, &minor);
 458         if (r < 0)
 459                 return r;
 460
 461         if (!session_is_controller(s, sd_bus_message_get_sender(message)))
 462                 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
 463
 464         dev = makedev(major, minor);
 465         sd = hashmap_get(s->devices, &dev);
 466         if (!sd)
 467                 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken");
 468
 469         session_device_complete_pause(sd);
 470
 471         return sd_bus_reply_method_return(message, NULL);
 472 }
 473
 474 const sd_bus_vtable session_vtable[] = {
 475         SD_BUS_VTABLE_START(0),
 476
 477         SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Session, id), SD_BUS_VTABLE_PROPERTY_CONST),
 478         SD_BUS_PROPERTY("User", "(uo)", property_get_user, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 479         SD_BUS_PROPERTY("Name", "s", property_get_name, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 480         BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(Session, timestamp), SD_BUS_VTABLE_PROPERTY_CONST),
 481         SD_BUS_PROPERTY("VTNr", "u", NULL, offsetof(Session, vtnr), SD_BUS_VTABLE_PROPERTY_CONST),
 482         SD_BUS_PROPERTY("Seat", "(so)", property_get_seat, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 483         SD_BUS_PROPERTY("TTY", "s", NULL, offsetof(Session, tty), SD_BUS_VTABLE_PROPERTY_CONST),
 484         SD_BUS_PROPERTY("Display", "s", NULL, offsetof(Session, display), SD_BUS_VTABLE_PROPERTY_CONST),
 485         SD_BUS_PROPERTY("Remote", "b", bus_property_get_bool, offsetof(Session, remote), SD_BUS_VTABLE_PROPERTY_CONST),
 486         SD_BUS_PROPERTY("RemoteHost", "s", NULL, offsetof(Session, remote_host), SD_BUS_VTABLE_PROPERTY_CONST),
 487         SD_BUS_PROPERTY("RemoteUser", "s", NULL, offsetof(Session, remote_user), SD_BUS_VTABLE_PROPERTY_CONST),
 488         SD_BUS_PROPERTY("Service", "s", NULL, offsetof(Session, service), SD_BUS_VTABLE_PROPERTY_CONST),
 489         SD_BUS_PROPERTY("Desktop", "s", NULL, offsetof(Session, desktop), SD_BUS_VTABLE_PROPERTY_CONST),
 490         SD_BUS_PROPERTY("Scope", "s", NULL, offsetof(Session, scope), SD_BUS_VTABLE_PROPERTY_CONST),
 491         SD_BUS_PROPERTY("Leader", "u", bus_property_get_pid, offsetof(Session, leader), SD_BUS_VTABLE_PROPERTY_CONST),
 492         SD_BUS_PROPERTY("Audit", "u", NULL, offsetof(Session, audit_id), SD_BUS_VTABLE_PROPERTY_CONST),
 493         SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Session, type), SD_BUS_VTABLE_PROPERTY_CONST),
 494         SD_BUS_PROPERTY("Class", "s", property_get_class, offsetof(Session, class), SD_BUS_VTABLE_PROPERTY_CONST),
 495         SD_BUS_PROPERTY("Active", "b", property_get_active, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 496         SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0),
 497         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 498         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 499         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 500         SD_BUS_PROPERTY("LockedHint", "b", property_get_locked_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 501
 502         SD_BUS_METHOD("Terminate", NULL, NULL, bus_session_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED),
 503         SD_BUS_METHOD("Activate", NULL, NULL, bus_session_method_activate, SD_BUS_VTABLE_UNPRIVILEGED),
 504         SD_BUS_METHOD("Lock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED),
 505         SD_BUS_METHOD("Unlock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED),
 506         SD_BUS_METHOD("SetIdleHint", "b", NULL, method_set_idle_hint, SD_BUS_VTABLE_UNPRIVILEGED),
 507         SD_BUS_METHOD("SetLockedHint", "b", NULL, method_set_locked_hint, SD_BUS_VTABLE_UNPRIVILEGED),
 508         SD_BUS_METHOD("Kill", "si", NULL, bus_session_method_kill, SD_BUS_VTABLE_UNPRIVILEGED),
 509         SD_BUS_METHOD("TakeControl", "b", NULL, method_take_control, SD_BUS_VTABLE_UNPRIVILEGED),
 510         SD_BUS_METHOD("ReleaseControl", NULL, NULL, method_release_control, SD_BUS_VTABLE_UNPRIVILEGED),
 511         SD_BUS_METHOD("TakeDevice", "uu", "hb", method_take_device, SD_BUS_VTABLE_UNPRIVILEGED),
 512         SD_BUS_METHOD("ReleaseDevice", "uu", NULL, method_release_device, SD_BUS_VTABLE_UNPRIVILEGED),
 513         SD_BUS_METHOD("PauseDeviceComplete", "uu", NULL, method_pause_device_complete, SD_BUS_VTABLE_UNPRIVILEGED),
 514
 515         SD_BUS_SIGNAL("PauseDevice", "uus", 0),
 516         SD_BUS_SIGNAL("ResumeDevice", "uuh", 0),
 517         SD_BUS_SIGNAL("Lock", NULL, 0),
 518         SD_BUS_SIGNAL("Unlock", NULL, 0),
 519
 520         SD_BUS_VTABLE_END
 521 };
 522
 523 int session_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
 524         Manager *m = userdata;
 525         Session *session;
 526         int r;
 527
 528         assert(bus);
 529         assert(path);
 530         assert(interface);
 531         assert(found);
 532         assert(m);
 533
 534         if (streq(path, "/org/freedesktop/login1/session/self")) {
 535                 sd_bus_message *message;
 536
 537                 message = sd_bus_get_current_message(bus);
 538                 if (!message)
 539                         return 0;
 540
 541                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 542                 if (r < 0)
 543                         return r;
 544         } else {
 545                 _cleanup_free_ char *e = NULL;
 546                 const char *p;
 547
 548                 p = startswith(path, "/org/freedesktop/login1/session/");
 549                 if (!p)
 550                         return 0;
 551
 552                 e = bus_label_unescape(p);
 553                 if (!e)
 554                         return -ENOMEM;
 555
 556                 session = hashmap_get(m->sessions, e);
 557                 if (!session)
 558                         return 0;
 559         }
 560
 561         *found = session;
 562         return 1;
 563 }
 564
 565 char *session_bus_path(Session *s) {
 566         _cleanup_free_ char *t = NULL;
 567
 568         assert(s);
 569
 570         t = bus_label_escape(s->id);
 571         if (!t)
 572                 return NULL;
 573
 574         return strappend("/org/freedesktop/login1/session/", t);
 575 }
 576
 577 int session_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
 578         _cleanup_strv_free_ char **l = NULL;
 579         sd_bus_message *message;
 580         Manager *m = userdata;
 581         Session *session;
 582         Iterator i;
 583         int r;
 584
 585         assert(bus);
 586         assert(path);
 587         assert(nodes);
 588
 589         HASHMAP_FOREACH(session, m->sessions, i) {
 590                 char *p;
 591
 592                 p = session_bus_path(session);
 593                 if (!p)
 594                         return -ENOMEM;
 595
 596                 r = strv_consume(&l, p);
 597                 if (r < 0)
 598                         return r;
 599         }
 600
 601         message = sd_bus_get_current_message(bus);
 602         if (message) {
 603                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 604                 const char *name;
 605
 606                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
 607                 if (r >= 0) {
 608                         r = sd_bus_creds_get_session(creds, &name);
 609                         if (r >= 0) {
 610                                 session = hashmap_get(m->sessions, name);
 611                                 if (session) {
 612                                         r = strv_extend(&l, "/org/freedesktop/login1/session/self");
 613                                         if (r < 0)
 614                                                 return r;
 615                                 }
 616                         }
 617                 }
 618         }
 619
 620         *nodes = TAKE_PTR(l);
 621
 622         return 1;
 623 }
 624
 625 int session_send_signal(Session *s, bool new_session) {
 626         _cleanup_free_ char *p = NULL;
 627
 628         assert(s);
 629
 630         p = session_bus_path(s);
 631         if (!p)
 632                 return -ENOMEM;
 633
 634         return sd_bus_emit_signal(
 635                         s->manager->bus,
 636                         "/org/freedesktop/login1",
 637                         "org.freedesktop.login1.Manager",
 638                         new_session ? "SessionNew" : "SessionRemoved",
 639                         "so", s->id, p);
 640 }
 641
 642 int session_send_changed(Session *s, const char *properties, ...) {
 643         _cleanup_free_ char *p = NULL;
 644         char **l;
 645
 646         assert(s);
 647
 648         if (!s->started)
 649                 return 0;
 650
 651         p = session_bus_path(s);
 652         if (!p)
 653                 return -ENOMEM;
 654
 655         l = strv_from_stdarg_alloca(properties);
 656
 657         return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Session", l);
 658 }
 659
 660 int session_send_lock(Session *s, bool lock) {
 661         _cleanup_free_ char *p = NULL;
 662
 663         assert(s);
 664
 665         p = session_bus_path(s);
 666         if (!p)
 667                 return -ENOMEM;
 668
 669         return sd_bus_emit_signal(
 670                         s->manager->bus,
 671                         p,
 672                         "org.freedesktop.login1.Session",
 673                         lock ? "Lock" : "Unlock",
 674                         NULL);
 675 }
 676
 677 int session_send_lock_all(Manager *m, bool lock) {
 678         Session *session;
 679         Iterator i;
 680         int r = 0;
 681
 682         assert(m);
 683
 684         HASHMAP_FOREACH(session, m->sessions, i) {
 685                 int k;
 686
 687                 k = session_send_lock(session, lock);
 688                 if (k < 0)
 689                         r = k;
 690         }
 691
 692         return r;
 693 }
 694
 695 int session_send_create_reply(Session *s, sd_bus_error *error) {
 696         _cleanup_(sd_bus_message_unrefp) sd_bus_message *c = NULL;
 697         _cleanup_close_ int fifo_fd = -1;
 698         _cleanup_free_ char *p = NULL;
 699
 700         assert(s);
 701
 702         /* This is called after the session scope and the user service
 703          * were successfully created, and finishes where
 704          * bus_manager_create_session() left off. */
 705
 706         if (!s->create_message)
 707                 return 0;
 708
 709         if (!sd_bus_error_is_set(error) && (s->scope_job || s->user->service_job))
 710                 return 0;
 711
 712         c = s->create_message;
 713         s->create_message = NULL;
 714
 715         if (error)
 716                 return sd_bus_reply_method_error(c, error);
 717
 718         fifo_fd = session_create_fifo(s);
 719         if (fifo_fd < 0)
 720                 return fifo_fd;
 721
 722         /* Update the session state file before we notify the client
 723          * about the result. */
 724         session_save(s);
 725
 726         p = session_bus_path(s);
 727         if (!p)
 728                 return -ENOMEM;
 729
 730         log_debug("Sending reply about created session: "
 731                   "id=%s object_path=%s uid=%u runtime_path=%s "
 732                   "session_fd=%d seat=%s vtnr=%u",
 733                   s->id,
 734                   p,
 735                   (uint32_t) s->user->uid,
 736                   s->user->runtime_path,
 737                   fifo_fd,
 738                   s->seat ? s->seat->id : "",
 739                   (uint32_t) s->vtnr);
 740
 741         return sd_bus_reply_method_return(
 742                         c, "soshusub",
 743                         s->id,
 744                         p,
 745                         s->user->runtime_path,
 746                         fifo_fd,
 747                         (uint32_t) s->user->uid,
 748                         s->seat ? s->seat->id : "",
 749                         (uint32_t) s->vtnr,
 750                         false);
 751 }