src/login/logind-session-dbus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <string.h>
   5
   6 #include "alloc-util.h"
   7 #include "bus-common-errors.h"
   8 #include "bus-label.h"
   9 #include "bus-util.h"
  10 #include "fd-util.h"
  11 #include "logind-session-device.h"
  12 #include "logind-session.h"
  13 #include "logind.h"
  14 #include "missing_capability.h"
  15 #include "signal-util.h"
  16 #include "stat-util.h"
  17 #include "strv.h"
  18 #include "util.h"
  19
  20 static int property_get_user(
  21                 sd_bus *bus,
  22                 const char *path,
  23                 const char *interface,
  24                 const char *property,
  25                 sd_bus_message *reply,
  26                 void *userdata,
  27                 sd_bus_error *error) {
  28
  29         _cleanup_free_ char *p = NULL;
  30         Session *s = userdata;
  31
  32         assert(bus);
  33         assert(reply);
  34         assert(s);
  35
  36         p = user_bus_path(s->user);
  37         if (!p)
  38                 return -ENOMEM;
  39
  40         return sd_bus_message_append(reply, "(uo)", (uint32_t) s->user->uid, p);
  41 }
  42
  43 static int property_get_name(
  44                 sd_bus *bus,
  45                 const char *path,
  46                 const char *interface,
  47                 const char *property,
  48                 sd_bus_message *reply,
  49                 void *userdata,
  50                 sd_bus_error *error) {
  51
  52         Session *s = userdata;
  53
  54         assert(bus);
  55         assert(reply);
  56         assert(s);
  57
  58         return sd_bus_message_append(reply, "s", s->user->name);
  59 }
  60
  61 static int property_get_seat(
  62                 sd_bus *bus,
  63                 const char *path,
  64                 const char *interface,
  65                 const char *property,
  66                 sd_bus_message *reply,
  67                 void *userdata,
  68                 sd_bus_error *error) {
  69
  70         _cleanup_free_ char *p = NULL;
  71         Session *s = userdata;
  72
  73         assert(bus);
  74         assert(reply);
  75         assert(s);
  76
  77         p = s->seat ? seat_bus_path(s->seat) : strdup("/");
  78         if (!p)
  79                 return -ENOMEM;
  80
  81         return sd_bus_message_append(reply, "(so)", s->seat ? s->seat->id : "", p);
  82 }
  83
  84 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, session_type, SessionType);
  85 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_class, session_class, SessionClass);
  86 static BUS_DEFINE_PROPERTY_GET(property_get_active, "b", Session, session_is_active);
  87 static BUS_DEFINE_PROPERTY_GET2(property_get_state, "s", Session, session_get_state, session_state_to_string);
  88
  89 static int property_get_idle_hint(
  90                 sd_bus *bus,
  91                 const char *path,
  92                 const char *interface,
  93                 const char *property,
  94                 sd_bus_message *reply,
  95                 void *userdata,
  96                 sd_bus_error *error) {
  97
  98         Session *s = userdata;
  99
 100         assert(bus);
 101         assert(reply);
 102         assert(s);
 103
 104         return sd_bus_message_append(reply, "b", session_get_idle_hint(s, NULL) > 0);
 105 }
 106
 107 static int property_get_idle_since_hint(
 108                 sd_bus *bus,
 109                 const char *path,
 110                 const char *interface,
 111                 const char *property,
 112                 sd_bus_message *reply,
 113                 void *userdata,
 114                 sd_bus_error *error) {
 115
 116         Session *s = userdata;
 117         dual_timestamp t = DUAL_TIMESTAMP_NULL;
 118         uint64_t u;
 119         int r;
 120
 121         assert(bus);
 122         assert(reply);
 123         assert(s);
 124
 125         r = session_get_idle_hint(s, &t);
 126         if (r < 0)
 127                 return r;
 128
 129         u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
 130
 131         return sd_bus_message_append(reply, "t", u);
 132 }
 133
 134 static int property_get_locked_hint(
 135                 sd_bus *bus,
 136                 const char *path,
 137                 const char *interface,
 138                 const char *property,
 139                 sd_bus_message *reply,
 140                 void *userdata,
 141                 sd_bus_error *error) {
 142
 143         Session *s = userdata;
 144
 145         assert(bus);
 146         assert(reply);
 147         assert(s);
 148
 149         return sd_bus_message_append(reply, "b", session_get_locked_hint(s) > 0);
 150 }
 151
 152 int bus_session_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 153         Session *s = userdata;
 154         int r;
 155
 156         assert(message);
 157         assert(s);
 158
 159         r = bus_verify_polkit_async(
 160                         message,
 161                         CAP_KILL,
 162                         "org.freedesktop.login1.manage",
 163                         NULL,
 164                         false,
 165                         s->user->uid,
 166                         &s->manager->polkit_registry,
 167                         error);
 168         if (r < 0)
 169                 return r;
 170         if (r == 0)
 171                 return 1; /* Will call us back */
 172
 173         r = session_stop(s, true);
 174         if (r < 0)
 175                 return r;
 176
 177         return sd_bus_reply_method_return(message, NULL);
 178 }
 179
 180 int bus_session_method_activate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 181         Session *s = userdata;
 182         int r;
 183
 184         assert(message);
 185         assert(s);
 186
 187         r = session_activate(s);
 188         if (r < 0)
 189                 return r;
 190
 191         return sd_bus_reply_method_return(message, NULL);
 192 }
 193
 194 int bus_session_method_lock(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 195         Session *s = userdata;
 196         int r;
 197
 198         assert(message);
 199         assert(s);
 200
 201         r = bus_verify_polkit_async(
 202                         message,
 203                         CAP_SYS_ADMIN,
 204                         "org.freedesktop.login1.lock-sessions",
 205                         NULL,
 206                         false,
 207                         s->user->uid,
 208                         &s->manager->polkit_registry,
 209                         error);
 210         if (r < 0)
 211                 return r;
 212         if (r == 0)
 213                 return 1; /* Will call us back */
 214
 215         r = session_send_lock(s, strstr(sd_bus_message_get_member(message), "Lock"));
 216         if (r < 0)
 217                 return r;
 218
 219         return sd_bus_reply_method_return(message, NULL);
 220 }
 221
 222 static int method_set_idle_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 223         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 224         Session *s = userdata;
 225         uid_t uid;
 226         int r, b;
 227
 228         assert(message);
 229         assert(s);
 230
 231         r = sd_bus_message_read(message, "b", &b);
 232         if (r < 0)
 233                 return r;
 234
 235         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
 236         if (r < 0)
 237                 return r;
 238
 239         r = sd_bus_creds_get_euid(creds, &uid);
 240         if (r < 0)
 241                 return r;
 242
 243         if (uid != 0 && uid != s->user->uid)
 244                 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set idle hint");
 245
 246         session_set_idle_hint(s, b);
 247
 248         return sd_bus_reply_method_return(message, NULL);
 249 }
 250
 251 static int method_set_locked_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 252         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 253         Session *s = userdata;
 254         uid_t uid;
 255         int r, b;
 256
 257         assert(message);
 258         assert(s);
 259
 260         r = sd_bus_message_read(message, "b", &b);
 261         if (r < 0)
 262                 return r;
 263
 264         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
 265         if (r < 0)
 266                 return r;
 267
 268         r = sd_bus_creds_get_euid(creds, &uid);
 269         if (r < 0)
 270                 return r;
 271
 272         if (uid != 0 && uid != s->user->uid)
 273                 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set locked hint");
 274
 275         session_set_locked_hint(s, b);
 276
 277         return sd_bus_reply_method_return(message, NULL);
 278 }
 279
 280 int bus_session_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 281         Session *s = userdata;
 282         const char *swho;
 283         int32_t signo;
 284         KillWho who;
 285         int r;
 286
 287         assert(message);
 288         assert(s);
 289
 290         r = sd_bus_message_read(message, "si", &swho, &signo);
 291         if (r < 0)
 292                 return r;
 293
 294         if (isempty(swho))
 295                 who = KILL_ALL;
 296         else {
 297                 who = kill_who_from_string(swho);
 298                 if (who < 0)
 299                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho);
 300         }
 301
 302         if (!SIGNAL_VALID(signo))
 303                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo);
 304
 305         r = bus_verify_polkit_async(
 306                         message,
 307                         CAP_KILL,
 308                         "org.freedesktop.login1.manage",
 309                         NULL,
 310                         false,
 311                         s->user->uid,
 312                         &s->manager->polkit_registry,
 313                         error);
 314         if (r < 0)
 315                 return r;
 316         if (r == 0)
 317                 return 1; /* Will call us back */
 318
 319         r = session_kill(s, who, signo);
 320         if (r < 0)
 321                 return r;
 322
 323         return sd_bus_reply_method_return(message, NULL);
 324 }
 325
 326 static int method_take_control(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 327         _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 328         Session *s = userdata;
 329         int r, force;
 330         uid_t uid;
 331
 332         assert(message);
 333         assert(s);
 334
 335         r = sd_bus_message_read(message, "b", &force);
 336         if (r < 0)
 337                 return r;
 338
 339         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
 340         if (r < 0)
 341                 return r;
 342
 343         r = sd_bus_creds_get_euid(creds, &uid);
 344         if (r < 0)
 345                 return r;
 346
 347         if (uid != 0 && (force || uid != s->user->uid))
 348                 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may take control");
 349
 350         r = session_set_controller(s, sd_bus_message_get_sender(message), force, true);
 351         if (r < 0)
 352                 return r;
 353
 354         return sd_bus_reply_method_return(message, NULL);
 355 }
 356
 357 static int method_release_control(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 358         Session *s = userdata;
 359
 360         assert(message);
 361         assert(s);
 362
 363         if (!session_is_controller(s, sd_bus_message_get_sender(message)))
 364                 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
 365
 366         session_drop_controller(s);
 367
 368         return sd_bus_reply_method_return(message, NULL);
 369 }
 370
 371 static int method_take_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 372         Session *s = userdata;
 373         uint32_t major, minor;
 374         SessionDevice *sd;
 375         dev_t dev;
 376         int r;
 377
 378         assert(message);
 379         assert(s);
 380
 381         r = sd_bus_message_read(message, "uu", &major, &minor);
 382         if (r < 0)
 383                 return r;
 384
 385         if (!DEVICE_MAJOR_VALID(major) || !DEVICE_MINOR_VALID(minor))
 386                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Device major/minor is not valid.");
 387
 388         if (!session_is_controller(s, sd_bus_message_get_sender(message)))
 389                 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
 390
 391         dev = makedev(major, minor);
 392         sd = hashmap_get(s->devices, &dev);
 393         if (sd)
 394                 /* We don't allow retrieving a device multiple times.
 395                  * The related ReleaseDevice call is not ref-counted.
 396                  * The caller should use dup() if it requires more
 397                  * than one fd (it would be functionally
 398                  * equivalent). */
 399                 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_IS_TAKEN, "Device already taken");
 400
 401         r = session_device_new(s, dev, true, &sd);
 402         if (r < 0)
 403                 return r;
 404
 405         r = session_device_save(sd);
 406         if (r < 0)
 407                 goto error;
 408
 409         r = sd_bus_reply_method_return(message, "hb", sd->fd, !sd->active);
 410         if (r < 0)
 411                 goto error;
 412
 413         session_save(s);
 414         return 1;
 415
 416 error:
 417         session_device_free(sd);
 418         return r;
 419 }
 420
 421 static int method_release_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 422         Session *s = userdata;
 423         uint32_t major, minor;
 424         SessionDevice *sd;
 425         dev_t dev;
 426         int r;
 427
 428         assert(message);
 429         assert(s);
 430
 431         r = sd_bus_message_read(message, "uu", &major, &minor);
 432         if (r < 0)
 433                 return r;
 434
 435         if (!DEVICE_MAJOR_VALID(major) || !DEVICE_MINOR_VALID(minor))
 436                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Device major/minor is not valid.");
 437
 438         if (!session_is_controller(s, sd_bus_message_get_sender(message)))
 439                 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
 440
 441         dev = makedev(major, minor);
 442         sd = hashmap_get(s->devices, &dev);
 443         if (!sd)
 444                 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken");
 445
 446         session_device_free(sd);
 447         session_save(s);
 448
 449         return sd_bus_reply_method_return(message, NULL);
 450 }
 451
 452 static int method_pause_device_complete(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 453         Session *s = userdata;
 454         uint32_t major, minor;
 455         SessionDevice *sd;
 456         dev_t dev;
 457         int r;
 458
 459         assert(message);
 460         assert(s);
 461
 462         r = sd_bus_message_read(message, "uu", &major, &minor);
 463         if (r < 0)
 464                 return r;
 465
 466         if (!DEVICE_MAJOR_VALID(major) || !DEVICE_MINOR_VALID(minor))
 467                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Device major/minor is not valid.");
 468
 469         if (!session_is_controller(s, sd_bus_message_get_sender(message)))
 470                 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
 471
 472         dev = makedev(major, minor);
 473         sd = hashmap_get(s->devices, &dev);
 474         if (!sd)
 475                 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken");
 476
 477         session_device_complete_pause(sd);
 478
 479         return sd_bus_reply_method_return(message, NULL);
 480 }
 481
 482 const sd_bus_vtable session_vtable[] = {
 483         SD_BUS_VTABLE_START(0),
 484
 485         SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Session, id), SD_BUS_VTABLE_PROPERTY_CONST),
 486         SD_BUS_PROPERTY("User", "(uo)", property_get_user, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 487         SD_BUS_PROPERTY("Name", "s", property_get_name, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 488         BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(Session, timestamp), SD_BUS_VTABLE_PROPERTY_CONST),
 489         SD_BUS_PROPERTY("VTNr", "u", NULL, offsetof(Session, vtnr), SD_BUS_VTABLE_PROPERTY_CONST),
 490         SD_BUS_PROPERTY("Seat", "(so)", property_get_seat, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 491         SD_BUS_PROPERTY("TTY", "s", NULL, offsetof(Session, tty), SD_BUS_VTABLE_PROPERTY_CONST),
 492         SD_BUS_PROPERTY("Display", "s", NULL, offsetof(Session, display), SD_BUS_VTABLE_PROPERTY_CONST),
 493         SD_BUS_PROPERTY("Remote", "b", bus_property_get_bool, offsetof(Session, remote), SD_BUS_VTABLE_PROPERTY_CONST),
 494         SD_BUS_PROPERTY("RemoteHost", "s", NULL, offsetof(Session, remote_host), SD_BUS_VTABLE_PROPERTY_CONST),
 495         SD_BUS_PROPERTY("RemoteUser", "s", NULL, offsetof(Session, remote_user), SD_BUS_VTABLE_PROPERTY_CONST),
 496         SD_BUS_PROPERTY("Service", "s", NULL, offsetof(Session, service), SD_BUS_VTABLE_PROPERTY_CONST),
 497         SD_BUS_PROPERTY("Desktop", "s", NULL, offsetof(Session, desktop), SD_BUS_VTABLE_PROPERTY_CONST),
 498         SD_BUS_PROPERTY("Scope", "s", NULL, offsetof(Session, scope), SD_BUS_VTABLE_PROPERTY_CONST),
 499         SD_BUS_PROPERTY("Leader", "u", bus_property_get_pid, offsetof(Session, leader), SD_BUS_VTABLE_PROPERTY_CONST),
 500         SD_BUS_PROPERTY("Audit", "u", NULL, offsetof(Session, audit_id), SD_BUS_VTABLE_PROPERTY_CONST),
 501         SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Session, type), SD_BUS_VTABLE_PROPERTY_CONST),
 502         SD_BUS_PROPERTY("Class", "s", property_get_class, offsetof(Session, class), SD_BUS_VTABLE_PROPERTY_CONST),
 503         SD_BUS_PROPERTY("Active", "b", property_get_active, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 504         SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0),
 505         SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 506         SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 507         SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 508         SD_BUS_PROPERTY("LockedHint", "b", property_get_locked_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 509
 510         SD_BUS_METHOD("Terminate", NULL, NULL, bus_session_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED),
 511         SD_BUS_METHOD("Activate", NULL, NULL, bus_session_method_activate, SD_BUS_VTABLE_UNPRIVILEGED),
 512         SD_BUS_METHOD("Lock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED),
 513         SD_BUS_METHOD("Unlock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED),
 514         SD_BUS_METHOD("SetIdleHint", "b", NULL, method_set_idle_hint, SD_BUS_VTABLE_UNPRIVILEGED),
 515         SD_BUS_METHOD("SetLockedHint", "b", NULL, method_set_locked_hint, SD_BUS_VTABLE_UNPRIVILEGED),
 516         SD_BUS_METHOD("Kill", "si", NULL, bus_session_method_kill, SD_BUS_VTABLE_UNPRIVILEGED),
 517         SD_BUS_METHOD("TakeControl", "b", NULL, method_take_control, SD_BUS_VTABLE_UNPRIVILEGED),
 518         SD_BUS_METHOD("ReleaseControl", NULL, NULL, method_release_control, SD_BUS_VTABLE_UNPRIVILEGED),
 519         SD_BUS_METHOD("TakeDevice", "uu", "hb", method_take_device, SD_BUS_VTABLE_UNPRIVILEGED),
 520         SD_BUS_METHOD("ReleaseDevice", "uu", NULL, method_release_device, SD_BUS_VTABLE_UNPRIVILEGED),
 521         SD_BUS_METHOD("PauseDeviceComplete", "uu", NULL, method_pause_device_complete, SD_BUS_VTABLE_UNPRIVILEGED),
 522
 523         SD_BUS_SIGNAL("PauseDevice", "uus", 0),
 524         SD_BUS_SIGNAL("ResumeDevice", "uuh", 0),
 525         SD_BUS_SIGNAL("Lock", NULL, 0),
 526         SD_BUS_SIGNAL("Unlock", NULL, 0),
 527
 528         SD_BUS_VTABLE_END
 529 };
 530
 531 int session_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
 532         Manager *m = userdata;
 533         Session *session;
 534         int r;
 535
 536         assert(bus);
 537         assert(path);
 538         assert(interface);
 539         assert(found);
 540         assert(m);
 541
 542         if (streq(path, "/org/freedesktop/login1/session/self")) {
 543                 sd_bus_message *message;
 544
 545                 message = sd_bus_get_current_message(bus);
 546                 if (!message)
 547                         return 0;
 548
 549                 r = manager_get_session_from_creds(m, message, NULL, error, &session);
 550                 if (r < 0)
 551                         return r;
 552         } else {
 553                 _cleanup_free_ char *e = NULL;
 554                 const char *p;
 555
 556                 p = startswith(path, "/org/freedesktop/login1/session/");
 557                 if (!p)
 558                         return 0;
 559
 560                 e = bus_label_unescape(p);
 561                 if (!e)
 562                         return -ENOMEM;
 563
 564                 session = hashmap_get(m->sessions, e);
 565                 if (!session)
 566                         return 0;
 567         }
 568
 569         *found = session;
 570         return 1;
 571 }
 572
 573 char *session_bus_path(Session *s) {
 574         _cleanup_free_ char *t = NULL;
 575
 576         assert(s);
 577
 578         t = bus_label_escape(s->id);
 579         if (!t)
 580                 return NULL;
 581
 582         return strappend("/org/freedesktop/login1/session/", t);
 583 }
 584
 585 int session_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
 586         _cleanup_strv_free_ char **l = NULL;
 587         sd_bus_message *message;
 588         Manager *m = userdata;
 589         Session *session;
 590         Iterator i;
 591         int r;
 592
 593         assert(bus);
 594         assert(path);
 595         assert(nodes);
 596
 597         HASHMAP_FOREACH(session, m->sessions, i) {
 598                 char *p;
 599
 600                 p = session_bus_path(session);
 601                 if (!p)
 602                         return -ENOMEM;
 603
 604                 r = strv_consume(&l, p);
 605                 if (r < 0)
 606                         return r;
 607         }
 608
 609         message = sd_bus_get_current_message(bus);
 610         if (message) {
 611                 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
 612                 const char *name;
 613
 614                 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
 615                 if (r >= 0) {
 616                         r = sd_bus_creds_get_session(creds, &name);
 617                         if (r >= 0) {
 618                                 session = hashmap_get(m->sessions, name);
 619                                 if (session) {
 620                                         r = strv_extend(&l, "/org/freedesktop/login1/session/self");
 621                                         if (r < 0)
 622                                                 return r;
 623                                 }
 624                         }
 625                 }
 626         }
 627
 628         *nodes = TAKE_PTR(l);
 629
 630         return 1;
 631 }
 632
 633 int session_send_signal(Session *s, bool new_session) {
 634         _cleanup_free_ char *p = NULL;
 635
 636         assert(s);
 637
 638         p = session_bus_path(s);
 639         if (!p)
 640                 return -ENOMEM;
 641
 642         return sd_bus_emit_signal(
 643                         s->manager->bus,
 644                         "/org/freedesktop/login1",
 645                         "org.freedesktop.login1.Manager",
 646                         new_session ? "SessionNew" : "SessionRemoved",
 647                         "so", s->id, p);
 648 }
 649
 650 int session_send_changed(Session *s, const char *properties, ...) {
 651         _cleanup_free_ char *p = NULL;
 652         char **l;
 653
 654         assert(s);
 655
 656         if (!s->started)
 657                 return 0;
 658
 659         p = session_bus_path(s);
 660         if (!p)
 661                 return -ENOMEM;
 662
 663         l = strv_from_stdarg_alloca(properties);
 664
 665         return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Session", l);
 666 }
 667
 668 int session_send_lock(Session *s, bool lock) {
 669         _cleanup_free_ char *p = NULL;
 670
 671         assert(s);
 672
 673         p = session_bus_path(s);
 674         if (!p)
 675                 return -ENOMEM;
 676
 677         return sd_bus_emit_signal(
 678                         s->manager->bus,
 679                         p,
 680                         "org.freedesktop.login1.Session",
 681                         lock ? "Lock" : "Unlock",
 682                         NULL);
 683 }
 684
 685 int session_send_lock_all(Manager *m, bool lock) {
 686         Session *session;
 687         Iterator i;
 688         int r = 0;
 689
 690         assert(m);
 691
 692         HASHMAP_FOREACH(session, m->sessions, i) {
 693                 int k;
 694
 695                 k = session_send_lock(session, lock);
 696                 if (k < 0)
 697                         r = k;
 698         }
 699
 700         return r;
 701 }
 702
 703 static bool session_ready(Session *s) {
 704         assert(s);
 705
 706         /* Returns true when the session is ready, i.e. all jobs we enqueued for it are done (regardless if successful or not) */
 707
 708         return !s->scope_job &&
 709                 !s->user->service_job;
 710 }
 711
 712 int session_send_create_reply(Session *s, sd_bus_error *error) {
 713         _cleanup_(sd_bus_message_unrefp) sd_bus_message *c = NULL;
 714         _cleanup_close_ int fifo_fd = -1;
 715         _cleanup_free_ char *p = NULL;
 716
 717         assert(s);
 718
 719         /* This is called after the session scope and the user service were successfully created, and finishes where
 720          * bus_manager_create_session() left off. */
 721
 722         if (!s->create_message)
 723                 return 0;
 724
 725         if (!sd_bus_error_is_set(error) && !session_ready(s))
 726                 return 0;
 727
 728         c = TAKE_PTR(s->create_message);
 729         if (error)
 730                 return sd_bus_reply_method_error(c, error);
 731
 732         fifo_fd = session_create_fifo(s);
 733         if (fifo_fd < 0)
 734                 return fifo_fd;
 735
 736         /* Update the session state file before we notify the client about the result. */
 737         session_save(s);
 738
 739         p = session_bus_path(s);
 740         if (!p)
 741                 return -ENOMEM;
 742
 743         log_debug("Sending reply about created session: "
 744                   "id=%s object_path=%s uid=%u runtime_path=%s "
 745                   "session_fd=%d seat=%s vtnr=%u",
 746                   s->id,
 747                   p,
 748                   (uint32_t) s->user->uid,
 749                   s->user->runtime_path,
 750                   fifo_fd,
 751                   s->seat ? s->seat->id : "",
 752                   (uint32_t) s->vtnr);
 753
 754         return sd_bus_reply_method_return(
 755                         c, "soshusub",
 756                         s->id,
 757                         p,
 758                         s->user->runtime_path,
 759                         fifo_fd,
 760                         (uint32_t) s->user->uid,
 761                         s->seat ? s->seat->id : "",
 762                         (uint32_t) s->vtnr,
 763                         false);
 764 }