src/login/logind-session-dbus.c

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