src/logind-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 General Public License as published by
  10   the Free Software Foundation; either version 2 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   General Public License for more details.
  17
  18   You should have received a copy of the GNU 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 #include <unistd.h>
  25 #include <pwd.h>
  26
  27 #include "logind.h"
  28 #include "dbus-common.h"
  29 #include "strv.h"
  30 #include "polkit.h"
  31 #include "special.h"
  32
  33 #define BUS_MANAGER_INTERFACE                                           \
  34         " <interface name=\"org.freedesktop.login1.Manager\">\n"        \
  35         "  <method name=\"GetSession\">\n"                              \
  36         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  37         "   <arg name=\"session\" type=\"o\" direction=\"out\"/>\n"     \
  38         "  </method>\n"                                                 \
  39         "  <method name=\"GetUser\">\n"                                 \
  40         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  41         "   <arg name=\"user\" type=\"o\" direction=\"out\"/>\n"        \
  42         "  </method>\n"                                                 \
  43         "  <method name=\"GetSeat\">\n"                                 \
  44         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  45         "   <arg name=\"seat\" type=\"o\" direction=\"out\"/>\n"        \
  46         "  </method>\n"                                                 \
  47         "  <method name=\"ListSessions\">\n"                            \
  48         "   <arg name=\"sessions\" type=\"a(susso)\" direction=\"out\"/>\n" \
  49         "  </method>\n"                                                 \
  50         "  <method name=\"ListUsers\">\n"                               \
  51         "   <arg name=\"users\" type=\"a(uso)\" direction=\"out\"/>\n"  \
  52         "  </method>\n"                                                 \
  53         "  <method name=\"ListSeats\">\n"                               \
  54         "   <arg name=\"seats\" type=\"a(so)\" direction=\"out\"/>\n"   \
  55         "  </method>\n"                                                 \
  56         "  <method name=\"CreateSession\">\n"                           \
  57         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  58         "   <arg name=\"leader\" type=\"u\" direction=\"in\"/>\n"       \
  59         "   <arg name=\"sevice\" type=\"s\" direction=\"in\"/>\n"       \
  60         "   <arg name=\"type\" type=\"s\" direction=\"in\"/>\n"         \
  61         "   <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n"         \
  62         "   <arg name=\"vtnr\" type=\"u\" direction=\"in\"/>\n"         \
  63         "   <arg name=\"tty\" type=\"s\" direction=\"in\"/>\n"          \
  64         "   <arg name=\"display\" type=\"s\" direction=\"in\"/>\n"      \
  65         "   <arg name=\"remote\" type=\"b\" direction=\"in\"/>\n"       \
  66         "   <arg name=\"remote_user\" type=\"s\" direction=\"in\"/>\n"  \
  67         "   <arg name=\"remote_host\" type=\"s\" direction=\"in\"/>\n"  \
  68         "   <arg name=\"controllers\" type=\"as\" direction=\"in\"/>\n" \
  69         "   <arg name=\"reset_controllers\" type=\"as\" direction=\"in\"/>\n" \
  70         "   <arg name=\"kill_processes\" type=\"b\" direction=\"in\"/>\n" \
  71         "   <arg name=\"id\" type=\"s\" direction=\"out\"/>\n"          \
  72         "   <arg name=\"path\" type=\"o\" direction=\"out\"/>\n"        \
  73         "   <arg name=\"runtime_path\" type=\"o\" direction=\"out\"/>\n" \
  74         "   <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n"          \
  75         "   <arg name=\"seat\" type=\"s\" direction=\"out\"/>\n"        \
  76         "   <arg name=\"vtnr\" type=\"u\" direction=\"out\"/>\n"        \
  77         "  </method>\n"                                                 \
  78         "  <method name=\"ActivateSession\">\n"                         \
  79         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  80         "  </method>\n"                                                 \
  81         "  <method name=\"LockSession\">\n"                             \
  82         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  83         "  </method>\n"                                                 \
  84         "  <method name=\"UnlockSession\">\n"                           \
  85         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  86         "  </method>\n"                                                 \
  87         "  <method name=\"KillSession\">\n"                             \
  88         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  89         "   <arg name=\"who\" type=\"s\"/>\n"                           \
  90         "   <arg name=\"signal\" type=\"s\"/>\n"                        \
  91         "  </method>\n"                                                 \
  92         "  <method name=\"KillUser\">\n"                                \
  93         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  94         "   <arg name=\"signal\" type=\"s\"/>\n"                        \
  95         "  </method>\n"                                                 \
  96         "  <method name=\"TerminateSession\">\n"                        \
  97         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  98         "  </method>\n"                                                 \
  99         "  <method name=\"TerminateUser\">\n"                           \
 100         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
 101         "  </method>\n"                                                 \
 102         "  <method name=\"TerminateSeat\">\n"                           \
 103         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
 104         "  </method>\n"                                                 \
 105         "  <method name=\"SetUserLinger\">\n"                           \
 106         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
 107         "   <arg name=\"b\" type=\"b\" direction=\"in\"/>\n"            \
 108         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
 109         "  </method>\n"                                                 \
 110         "  <method name=\"AttachDevice\">\n"                            \
 111         "   <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n"         \
 112         "   <arg name=\"sysfs\" type=\"s\" direction=\"in\"/>\n"        \
 113         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
 114         "  </method>\n"                                                 \
 115         "  <method name=\"FlushDevices\">\n"                            \
 116         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
 117         "  </method>\n"                                                 \
 118         "  <method name=\"PowerOff\">\n"                                \
 119         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
 120         "  </method>\n"                                                 \
 121         "  <method name=\"Reboot\">\n"                                  \
 122         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
 123         "  </method>\n"                                                 \
 124         "  <signal name=\"SessionNew\">\n"                              \
 125         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 126         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 127         "  </signal>\n"                                                 \
 128         "  <signal name=\"SessionRemoved\">\n"                          \
 129         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 130         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 131         "  </signal>\n"                                                 \
 132         "  <signal name=\"UserNew\">\n"                                 \
 133         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
 134         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 135         "  </signal>\n"                                                 \
 136         "  <signal name=\"UserRemoved\">\n"                             \
 137         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
 138         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 139         "  </signal>\n"                                                 \
 140         "  <signal name=\"SeatNew\">\n"                                 \
 141         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 142         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 143         "  </signal>\n"                                                 \
 144         "  <signal name=\"SeatRemoved\">\n"                             \
 145         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 146         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 147         "  </signal>\n"                                                 \
 148         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 149         "  <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \
 150         "  <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \
 151         "  <property name=\"NAutoVTs\" type=\"u\" access=\"read\"/>\n" \
 152         "  <property name=\"KillOnlyUsers\" type=\"as\" access=\"read\"/>\n" \
 153         "  <property name=\"KillExcludeUsers\" type=\"as\" access=\"read\"/>\n" \
 154         "  <property name=\"KillUserProcesses\" type=\"b\" access=\"read\"/>\n" \
 155         "  <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n"  \
 156         "  <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
 157         "  <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
 158         " </interface>\n"
 159
 160 #define INTROSPECTION_BEGIN                                             \
 161         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 162         "<node>\n"                                                      \
 163         BUS_MANAGER_INTERFACE                                           \
 164         BUS_PROPERTIES_INTERFACE                                        \
 165         BUS_PEER_INTERFACE                                              \
 166         BUS_INTROSPECTABLE_INTERFACE
 167
 168 #define INTROSPECTION_END                                               \
 169         "</node>\n"
 170
 171 #define INTERFACES_LIST                              \
 172         BUS_GENERIC_INTERFACES_LIST                  \
 173         "org.freedesktop.login1.Manager\0"
 174
 175 static int bus_manager_append_idle_hint(DBusMessageIter *i, const char *property, void *data) {
 176         Manager *m = data;
 177         dbus_bool_t b;
 178
 179         assert(i);
 180         assert(property);
 181         assert(m);
 182
 183         b = manager_get_idle_hint(m, NULL) > 0;
 184         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
 185                 return -ENOMEM;
 186
 187         return 0;
 188 }
 189
 190 static int bus_manager_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) {
 191         Manager *m = data;
 192         dual_timestamp t;
 193         uint64_t u;
 194
 195         assert(i);
 196         assert(property);
 197         assert(m);
 198
 199         manager_get_idle_hint(m, &t);
 200         u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
 201
 202         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
 203                 return -ENOMEM;
 204
 205         return 0;
 206 }
 207
 208 static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMessage **_reply) {
 209         Session *session = NULL;
 210         User *user = NULL;
 211         const char *type, *seat, *tty, *display, *remote_user, *remote_host, *service;
 212         uint32_t uid, leader, audit_id = 0;
 213         dbus_bool_t remote, kill_processes;
 214         char **controllers = NULL, **reset_controllers = NULL;
 215         SessionType t;
 216         Seat *s;
 217         DBusMessageIter iter;
 218         int r;
 219         char *id = NULL, *p;
 220         uint32_t vtnr = 0;
 221         int fifo_fd = -1;
 222         DBusMessage *reply = NULL;
 223         bool b;
 224
 225         assert(m);
 226         assert(message);
 227         assert(_reply);
 228
 229         if (!dbus_message_iter_init(message, &iter) ||
 230             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 231                 return -EINVAL;
 232
 233         dbus_message_iter_get_basic(&iter, &uid);
 234
 235         if (!dbus_message_iter_next(&iter) ||
 236             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 237                 return -EINVAL;
 238
 239         dbus_message_iter_get_basic(&iter, &leader);
 240
 241         if (leader <= 0 ||
 242             !dbus_message_iter_next(&iter) ||
 243             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 244                 return -EINVAL;
 245
 246         dbus_message_iter_get_basic(&iter, &service);
 247
 248         if (!dbus_message_iter_next(&iter) ||
 249             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 250                 return -EINVAL;
 251
 252         dbus_message_iter_get_basic(&iter, &type);
 253         t = session_type_from_string(type);
 254
 255         if (t < 0 ||
 256             !dbus_message_iter_next(&iter) ||
 257             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 258                 return -EINVAL;
 259
 260         dbus_message_iter_get_basic(&iter, &seat);
 261
 262         if (isempty(seat))
 263                 s = NULL;
 264         else {
 265                 s = hashmap_get(m->seats, seat);
 266                 if (!s)
 267                         return -ENOENT;
 268         }
 269
 270         if (!dbus_message_iter_next(&iter) ||
 271             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 272                 return -EINVAL;
 273
 274         dbus_message_iter_get_basic(&iter, &vtnr);
 275
 276         if (!dbus_message_iter_next(&iter) ||
 277             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 278                 return -EINVAL;
 279
 280         dbus_message_iter_get_basic(&iter, &tty);
 281
 282         if (tty_is_vc(tty)) {
 283                 int v;
 284
 285                 if (!s)
 286                         s = m->vtconsole;
 287                 else if (s != m->vtconsole)
 288                         return -EINVAL;
 289
 290                 v = vtnr_from_tty(tty);
 291
 292                 if (v <= 0)
 293                         return v < 0 ? v : -EINVAL;
 294
 295                 if (vtnr <= 0)
 296                         vtnr = (uint32_t) v;
 297                 else if (vtnr != (uint32_t) v)
 298                         return -EINVAL;
 299
 300         } else if (!isempty(tty) && s && seat_is_vtconsole(s))
 301                 return -EINVAL;
 302
 303         if (s) {
 304                 if (seat_is_vtconsole(s)) {
 305                         if (vtnr <= 0 || vtnr > 63)
 306                                 return -EINVAL;
 307                 } else {
 308                         if (vtnr > 0)
 309                                 return -EINVAL;
 310                 }
 311         }
 312
 313         if (!dbus_message_iter_next(&iter) ||
 314             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 315                 return -EINVAL;
 316
 317         dbus_message_iter_get_basic(&iter, &display);
 318
 319         if (!dbus_message_iter_next(&iter) ||
 320             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
 321                 return -EINVAL;
 322
 323         dbus_message_iter_get_basic(&iter, &remote);
 324
 325         if (!dbus_message_iter_next(&iter) ||
 326             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 327                 return -EINVAL;
 328
 329         dbus_message_iter_get_basic(&iter, &remote_user);
 330
 331         if (!dbus_message_iter_next(&iter) ||
 332             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 333                 return -EINVAL;
 334
 335         dbus_message_iter_get_basic(&iter, &remote_host);
 336
 337         if (!dbus_message_iter_next(&iter) ||
 338             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 339             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
 340                 return -EINVAL;
 341
 342         r = bus_parse_strv_iter(&iter, &controllers);
 343         if (r < 0)
 344                 return -EINVAL;
 345
 346         if (strv_contains(controllers, "systemd") ||
 347             !dbus_message_iter_next(&iter) ||
 348             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 349             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING) {
 350                 r = -EINVAL;
 351                 goto fail;
 352         }
 353
 354         r = bus_parse_strv_iter(&iter, &reset_controllers);
 355         if (r < 0)
 356                 goto fail;
 357
 358         if (strv_contains(reset_controllers, "systemd") ||
 359             !dbus_message_iter_next(&iter) ||
 360             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) {
 361                 r = -EINVAL;
 362                 goto fail;
 363         }
 364
 365         dbus_message_iter_get_basic(&iter, &kill_processes);
 366
 367         r = manager_add_user_by_uid(m, uid, &user);
 368         if (r < 0)
 369                 goto fail;
 370
 371         audit_session_from_pid(leader, &audit_id);
 372
 373         if (audit_id > 0) {
 374                 asprintf(&id, "%lu", (unsigned long) audit_id);
 375
 376                 if (!id) {
 377                         r = -ENOMEM;
 378                         goto fail;
 379                 }
 380
 381                 session = hashmap_get(m->sessions, id);
 382
 383                 if (session) {
 384                         free(id);
 385
 386                         fifo_fd = session_create_fifo(session);
 387                         if (fifo_fd < 0) {
 388                                 r = fifo_fd;
 389                                 goto fail;
 390                         }
 391
 392                         /* Session already exists, client is probably
 393                          * something like "su" which changes uid but
 394                          * is still the same audit session */
 395
 396                         reply = dbus_message_new_method_return(message);
 397                         if (!reply) {
 398                                 r = -ENOMEM;
 399                                 goto fail;
 400                         }
 401
 402                         p = session_bus_path(session);
 403                         if (!p) {
 404                                 r = -ENOMEM;
 405                                 goto fail;
 406                         }
 407
 408                         b = dbus_message_append_args(
 409                                         reply,
 410                                         DBUS_TYPE_STRING, &session->id,
 411                                         DBUS_TYPE_OBJECT_PATH, &p,
 412                                         DBUS_TYPE_STRING, &session->user->runtime_path,
 413                                         DBUS_TYPE_UNIX_FD, &fifo_fd,
 414                                         DBUS_TYPE_INVALID);
 415                         free(p);
 416
 417                         if (!b) {
 418                                 r = -ENOMEM;
 419                                 goto fail;
 420                         }
 421
 422                         close_nointr_nofail(fifo_fd);
 423                         *_reply = reply;
 424
 425                         strv_free(controllers);
 426                         strv_free(reset_controllers);
 427
 428                         return 0;
 429                 }
 430
 431         } else {
 432                 do {
 433                         free(id);
 434                         asprintf(&id, "c%lu", ++m->session_counter);
 435
 436                         if (!id) {
 437                                 r = -ENOMEM;
 438                                 goto fail;
 439                         }
 440
 441                 } while (hashmap_get(m->sessions, id));
 442         }
 443
 444         r = manager_add_session(m, user, id, &session);
 445         free(id);
 446         if (r < 0)
 447                 goto fail;
 448
 449         session->leader = leader;
 450         session->audit_id = audit_id;
 451         session->type = t;
 452         session->remote = remote;
 453         session->controllers = controllers;
 454         session->reset_controllers = reset_controllers;
 455         session->kill_processes = kill_processes;
 456         session->vtnr = vtnr;
 457
 458         controllers = reset_controllers = NULL;
 459
 460         if (!isempty(tty)) {
 461                 session->tty = strdup(tty);
 462                 if (!session->tty) {
 463                         r = -ENOMEM;
 464                         goto fail;
 465                 }
 466         }
 467
 468         if (!isempty(display)) {
 469                 session->display = strdup(display);
 470                 if (!session->display) {
 471                         r = -ENOMEM;
 472                         goto fail;
 473                 }
 474         }
 475
 476         if (!isempty(remote_user)) {
 477                 session->remote_user = strdup(remote_user);
 478                 if (!session->remote_user) {
 479                         r = -ENOMEM;
 480                         goto fail;
 481                 }
 482         }
 483
 484         if (!isempty(remote_host)) {
 485                 session->remote_host = strdup(remote_host);
 486                 if (!session->remote_host) {
 487                         r = -ENOMEM;
 488                         goto fail;
 489                 }
 490         }
 491
 492         if (!isempty(service)) {
 493                 session->service = strdup(service);
 494                 if (!session->service) {
 495                         r = -ENOMEM;
 496                         goto fail;
 497                 }
 498         }
 499
 500         fifo_fd = session_create_fifo(session);
 501         if (fifo_fd < 0) {
 502                 r = fifo_fd;
 503                 goto fail;
 504         }
 505
 506         if (s) {
 507                 r = seat_attach_session(s, session);
 508                 if (r < 0)
 509                         goto fail;
 510         }
 511
 512         r = session_start(session);
 513         if (r < 0)
 514                 goto fail;
 515
 516         reply = dbus_message_new_method_return(message);
 517         if (!reply) {
 518                 r = -ENOMEM;
 519                 goto fail;
 520         }
 521
 522         p = session_bus_path(session);
 523         if (!p) {
 524                 r = -ENOMEM;
 525                 goto fail;
 526         }
 527
 528         seat = s ? s->id : "";
 529         b = dbus_message_append_args(
 530                         reply,
 531                         DBUS_TYPE_STRING, &session->id,
 532                         DBUS_TYPE_OBJECT_PATH, &p,
 533                         DBUS_TYPE_STRING, &session->user->runtime_path,
 534                         DBUS_TYPE_UNIX_FD, &fifo_fd,
 535                         DBUS_TYPE_STRING, &seat,
 536                         DBUS_TYPE_UINT32, &vtnr,
 537                         DBUS_TYPE_INVALID);
 538         free(p);
 539
 540         if (!b) {
 541                 r = -ENOMEM;
 542                 goto fail;
 543         }
 544
 545         close_nointr_nofail(fifo_fd);
 546         *_reply = reply;
 547
 548         return 0;
 549
 550 fail:
 551         strv_free(controllers);
 552         strv_free(reset_controllers);
 553
 554         if (session)
 555                 session_add_to_gc_queue(session);
 556
 557         if (user)
 558                 user_add_to_gc_queue(user);
 559
 560         if (fifo_fd >= 0)
 561                 close_nointr_nofail(fifo_fd);
 562
 563         if (reply)
 564                 dbus_message_unref(reply);
 565
 566         return r;
 567 }
 568
 569 static int trigger_device(Manager *m, struct udev_device *d) {
 570         struct udev_enumerate *e;
 571         struct udev_list_entry *first, *item;
 572         int r;
 573
 574         assert(m);
 575
 576         e = udev_enumerate_new(m->udev);
 577         if (!e) {
 578                 r = -ENOMEM;
 579                 goto finish;
 580         }
 581
 582         if (d) {
 583                 if (udev_enumerate_add_match_parent(e, d) < 0) {
 584                         r = -EIO;
 585                         goto finish;
 586                 }
 587         }
 588
 589         if (udev_enumerate_scan_devices(e) < 0) {
 590                 r = -EIO;
 591                 goto finish;
 592         }
 593
 594         first = udev_enumerate_get_list_entry(e);
 595         udev_list_entry_foreach(item, first) {
 596                 char *t;
 597                 const char *p;
 598
 599                 p = udev_list_entry_get_name(item);
 600
 601                 t = strappend(p, "/uevent");
 602                 if (!t) {
 603                         r = -ENOMEM;
 604                         goto finish;
 605                 }
 606
 607                 write_one_line_file(t, "change");
 608                 free(t);
 609         }
 610
 611         r = 0;
 612
 613 finish:
 614         if (e)
 615                 udev_enumerate_unref(e);
 616
 617         return r;
 618 }
 619
 620 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
 621         struct udev_device *d;
 622         char *rule = NULL, *file = NULL;
 623         const char *id_for_seat;
 624         int r;
 625
 626         assert(m);
 627         assert(seat);
 628         assert(sysfs);
 629
 630         d = udev_device_new_from_syspath(m->udev, sysfs);
 631         if (!d)
 632                 return -ENODEV;
 633
 634         if (!udev_device_has_tag(d, "seat")) {
 635                 r = -ENODEV;
 636                 goto finish;
 637         }
 638
 639         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
 640         if (!id_for_seat) {
 641                 r = -ENODEV;
 642                 goto finish;
 643         }
 644
 645         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0) {
 646                 r = -ENOMEM;
 647                 goto finish;
 648         }
 649
 650         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0) {
 651                 r = -ENOMEM;
 652                 goto finish;
 653         }
 654
 655         mkdir_p("/etc/udev/rules.d", 0755);
 656         r = write_one_line_file_atomic(file, rule);
 657         if (r < 0)
 658                 goto finish;
 659
 660         r = trigger_device(m, d);
 661
 662 finish:
 663         free(rule);
 664         free(file);
 665
 666         if (d)
 667                 udev_device_unref(d);
 668
 669         return r;
 670 }
 671
 672 static int flush_devices(Manager *m) {
 673         DIR *d;
 674
 675         assert(m);
 676
 677         d = opendir("/etc/udev/rules.d");
 678         if (!d) {
 679                 if (errno != ENOENT)
 680                         log_warning("Failed to open /etc/udev/rules.d: %m");
 681         } else {
 682                 struct dirent *de;
 683
 684                 while ((de = readdir(d))) {
 685
 686                         if (!dirent_is_file(de))
 687                                 continue;
 688
 689                         if (!startswith(de->d_name, "72-seat-"))
 690                                 continue;
 691
 692                         if (!endswith(de->d_name, ".rules"))
 693                                 continue;
 694
 695                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
 696                                 log_warning("Failed to unlink %s: %m", de->d_name);
 697                 }
 698
 699                 closedir(d);
 700         }
 701
 702         return trigger_device(m, NULL);
 703 }
 704
 705 static DBusHandlerResult manager_message_handler(
 706                 DBusConnection *connection,
 707                 DBusMessage *message,
 708                 void *userdata) {
 709
 710         Manager *m = userdata;
 711
 712         const BusProperty properties[] = {
 713                 { "org.freedesktop.login1.Manager", "ControlGroupHierarchy",  bus_property_append_string,   "s",  m->cgroup_path          },
 714                 { "org.freedesktop.login1.Manager", "Controllers",            bus_property_append_strv,     "as", m->controllers          },
 715                 { "org.freedesktop.login1.Manager", "ResetControllers",       bus_property_append_strv,     "as", m->reset_controllers    },
 716                 { "org.freedesktop.login1.Manager", "NAutoVTs",               bus_property_append_unsigned, "u",  &m->n_autovts           },
 717                 { "org.freedesktop.login1.Manager", "KillOnlyUsers",          bus_property_append_strv,     "as", m->kill_only_users      },
 718                 { "org.freedesktop.login1.Manager", "KillExcludeUsers",       bus_property_append_strv,     "as", m->kill_exclude_users   },
 719                 { "org.freedesktop.login1.Manager", "KillUserProcesses",      bus_property_append_bool,     "b",  &m->kill_user_processes },
 720                 { "org.freedesktop.login1.Manager", "IdleHint",               bus_manager_append_idle_hint, "b",  m                       },
 721                 { "org.freedesktop.login1.Manager", "IdleSinceHint",          bus_manager_append_idle_hint_since, "t", m                  },
 722                 { "org.freedesktop.login1.Manager", "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", m                  },
 723                 { NULL, NULL, NULL, NULL, NULL }
 724         };
 725
 726         DBusError error;
 727         DBusMessage *reply = NULL;
 728         int r;
 729
 730         assert(connection);
 731         assert(message);
 732         assert(m);
 733
 734         dbus_error_init(&error);
 735
 736         if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSession")) {
 737                 const char *name;
 738                 char *p;
 739                 Session *session;
 740                 bool b;
 741
 742                 if (!dbus_message_get_args(
 743                                     message,
 744                                     &error,
 745                                     DBUS_TYPE_STRING, &name,
 746                                     DBUS_TYPE_INVALID))
 747                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 748
 749                 session = hashmap_get(m->sessions, name);
 750                 if (!session)
 751                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 752
 753                 reply = dbus_message_new_method_return(message);
 754                 if (!reply)
 755                         goto oom;
 756
 757                 p = session_bus_path(session);
 758                 if (!p)
 759                         goto oom;
 760
 761                 b = dbus_message_append_args(
 762                                 reply,
 763                                 DBUS_TYPE_OBJECT_PATH, &p,
 764                                 DBUS_TYPE_INVALID);
 765                 free(p);
 766
 767                 if (!b)
 768                         goto oom;
 769
 770         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetUser")) {
 771                 uint32_t uid;
 772                 char *p;
 773                 User *user;
 774                 bool b;
 775
 776                 if (!dbus_message_get_args(
 777                                     message,
 778                                     &error,
 779                                     DBUS_TYPE_UINT32, &uid,
 780                                     DBUS_TYPE_INVALID))
 781                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 782
 783                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 784                 if (!user)
 785                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 786
 787                 reply = dbus_message_new_method_return(message);
 788                 if (!reply)
 789                         goto oom;
 790
 791                 p = user_bus_path(user);
 792                 if (!p)
 793                         goto oom;
 794
 795                 b = dbus_message_append_args(
 796                                 reply,
 797                                 DBUS_TYPE_OBJECT_PATH, &p,
 798                                 DBUS_TYPE_INVALID);
 799                 free(p);
 800
 801                 if (!b)
 802                         goto oom;
 803
 804         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSeat")) {
 805                 const char *name;
 806                 char *p;
 807                 Seat *seat;
 808                 bool b;
 809
 810                 if (!dbus_message_get_args(
 811                                     message,
 812                                     &error,
 813                                     DBUS_TYPE_STRING, &name,
 814                                     DBUS_TYPE_INVALID))
 815                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 816
 817                 seat = hashmap_get(m->seats, name);
 818                 if (!seat)
 819                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 820
 821                 reply = dbus_message_new_method_return(message);
 822                 if (!reply)
 823                         goto oom;
 824
 825                 p = seat_bus_path(seat);
 826                 if (!p)
 827                         goto oom;
 828
 829                 b = dbus_message_append_args(
 830                                 reply,
 831                                 DBUS_TYPE_OBJECT_PATH, &p,
 832                                 DBUS_TYPE_INVALID);
 833                 free(p);
 834
 835                 if (!b)
 836                         goto oom;
 837
 838         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSessions")) {
 839                 char *p;
 840                 Session *session;
 841                 Iterator i;
 842                 DBusMessageIter iter, sub;
 843                 const char *empty = "";
 844
 845                 reply = dbus_message_new_method_return(message);
 846                 if (!reply)
 847                         goto oom;
 848
 849                 dbus_message_iter_init_append(reply, &iter);
 850
 851                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(susso)", &sub))
 852                         goto oom;
 853
 854                 HASHMAP_FOREACH(session, m->sessions, i) {
 855                         DBusMessageIter sub2;
 856                         uint32_t uid;
 857
 858                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 859                                 goto oom;
 860
 861                         uid = session->user->uid;
 862
 863                         p = session_bus_path(session);
 864                         if (!p)
 865                                 goto oom;
 866
 867                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) ||
 868                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 869                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->user->name) ||
 870                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, session->seat ? (const char**) &session->seat->id : &empty) ||
 871                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 872                                 free(p);
 873                                 goto oom;
 874                         }
 875
 876                         free(p);
 877
 878                         if (!dbus_message_iter_close_container(&sub, &sub2))
 879                                 goto oom;
 880                 }
 881
 882                 if (!dbus_message_iter_close_container(&iter, &sub))
 883                         goto oom;
 884
 885         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListUsers")) {
 886                 char *p;
 887                 User *user;
 888                 Iterator i;
 889                 DBusMessageIter iter, sub;
 890
 891                 reply = dbus_message_new_method_return(message);
 892                 if (!reply)
 893                         goto oom;
 894
 895                 dbus_message_iter_init_append(reply, &iter);
 896
 897                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(uso)", &sub))
 898                         goto oom;
 899
 900                 HASHMAP_FOREACH(user, m->users, i) {
 901                         DBusMessageIter sub2;
 902                         uint32_t uid;
 903
 904                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 905                                 goto oom;
 906
 907                         uid = user->uid;
 908
 909                         p = user_bus_path(user);
 910                         if (!p)
 911                                 goto oom;
 912
 913                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 914                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &user->name) ||
 915                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 916                                 free(p);
 917                                 goto oom;
 918                         }
 919
 920                         free(p);
 921
 922                         if (!dbus_message_iter_close_container(&sub, &sub2))
 923                                 goto oom;
 924                 }
 925
 926                 if (!dbus_message_iter_close_container(&iter, &sub))
 927                         goto oom;
 928
 929         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSeats")) {
 930                 char *p;
 931                 Seat *seat;
 932                 Iterator i;
 933                 DBusMessageIter iter, sub;
 934
 935                 reply = dbus_message_new_method_return(message);
 936                 if (!reply)
 937                         goto oom;
 938
 939                 dbus_message_iter_init_append(reply, &iter);
 940
 941                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(so)", &sub))
 942                         goto oom;
 943
 944                 HASHMAP_FOREACH(seat, m->seats, i) {
 945                         DBusMessageIter sub2;
 946
 947                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 948                                 goto oom;
 949
 950                         p = seat_bus_path(seat);
 951                         if (!p)
 952                                 goto oom;
 953
 954                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &seat->id) ||
 955                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 956                                 free(p);
 957                                 goto oom;
 958                         }
 959
 960                         free(p);
 961
 962                         if (!dbus_message_iter_close_container(&sub, &sub2))
 963                                 goto oom;
 964                 }
 965
 966                 if (!dbus_message_iter_close_container(&iter, &sub))
 967                         goto oom;
 968
 969         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
 970
 971                 r = bus_manager_create_session(m, message, &reply);
 972                 if (r == -ENOMEM)
 973                         goto oom;
 974
 975                 if (r < 0)
 976                         return bus_send_error_reply(connection, message, &error, r);
 977
 978         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
 979                 const char *name;
 980                 Session *session;
 981
 982                 if (!dbus_message_get_args(
 983                                     message,
 984                                     &error,
 985                                     DBUS_TYPE_STRING, &name,
 986                                     DBUS_TYPE_INVALID))
 987                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 988
 989                 session = hashmap_get(m->sessions, name);
 990                 if (!session)
 991                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 992
 993                 r = session_activate(session);
 994                 if (r < 0)
 995                         return bus_send_error_reply(connection, message, NULL, r);
 996
 997                 reply = dbus_message_new_method_return(message);
 998                 if (!reply)
 999                         goto oom;
1000
1001         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "LockSession") ||
1002                    dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "UnlockSession")) {
1003                 const char *name;
1004                 Session *session;
1005
1006                 if (!dbus_message_get_args(
1007                                     message,
1008                                     &error,
1009                                     DBUS_TYPE_STRING, &name,
1010                                     DBUS_TYPE_INVALID))
1011                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1012
1013                 session = hashmap_get(m->sessions, name);
1014                 if (!session)
1015                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1016
1017                 if (session_send_lock(session, streq(dbus_message_get_member(message), "LockSession")) < 0)
1018                         goto oom;
1019
1020                 reply = dbus_message_new_method_return(message);
1021                 if (!reply)
1022                         goto oom;
1023
1024         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "KillSession")) {
1025                 const char *swho;
1026                 int32_t signo;
1027                 KillWho who;
1028                 const char *name;
1029                 Session *session;
1030
1031                 if (!dbus_message_get_args(
1032                                     message,
1033                                     &error,
1034                                     DBUS_TYPE_STRING, &name,
1035                                     DBUS_TYPE_STRING, &swho,
1036                                     DBUS_TYPE_INT32, &signo,
1037                                     DBUS_TYPE_INVALID))
1038                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1039
1040                 if (isempty(swho))
1041                         who = KILL_ALL;
1042                 else {
1043                         who = kill_who_from_string(swho);
1044                         if (who < 0)
1045                                 return bus_send_error_reply(connection, message, &error, -EINVAL);
1046                 }
1047
1048                 if (signo <= 0 || signo >= _NSIG)
1049                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1050
1051                 session = hashmap_get(m->sessions, name);
1052                 if (!session)
1053                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1054
1055                 r = session_kill(session, who, signo);
1056                 if (r < 0)
1057                         return bus_send_error_reply(connection, message, NULL, r);
1058
1059                 reply = dbus_message_new_method_return(message);
1060                 if (!reply)
1061                         goto oom;
1062
1063         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "KillUser")) {
1064                 uint32_t uid;
1065                 User *user;
1066                 int32_t signo;
1067
1068                 if (!dbus_message_get_args(
1069                                     message,
1070                                     &error,
1071                                     DBUS_TYPE_UINT32, &uid,
1072                                     DBUS_TYPE_INT32, &signo,
1073                                     DBUS_TYPE_INVALID))
1074                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1075
1076                 if (signo <= 0 || signo >= _NSIG)
1077                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1078
1079                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
1080                 if (!user)
1081                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1082
1083                 r = user_kill(user, signo);
1084                 if (r < 0)
1085                         return bus_send_error_reply(connection, message, NULL, r);
1086
1087                 reply = dbus_message_new_method_return(message);
1088                 if (!reply)
1089                         goto oom;
1090
1091         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSession")) {
1092                 const char *name;
1093                 Session *session;
1094
1095                 if (!dbus_message_get_args(
1096                                     message,
1097                                     &error,
1098                                     DBUS_TYPE_STRING, &name,
1099                                     DBUS_TYPE_INVALID))
1100                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1101
1102                 session = hashmap_get(m->sessions, name);
1103                 if (!session)
1104                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1105
1106                 r = session_stop(session);
1107                 if (r < 0)
1108                         return bus_send_error_reply(connection, message, NULL, r);
1109
1110                 reply = dbus_message_new_method_return(message);
1111                 if (!reply)
1112                         goto oom;
1113
1114         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateUser")) {
1115                 uint32_t uid;
1116                 User *user;
1117
1118                 if (!dbus_message_get_args(
1119                                     message,
1120                                     &error,
1121                                     DBUS_TYPE_UINT32, &uid,
1122                                     DBUS_TYPE_INVALID))
1123                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1124
1125                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
1126                 if (!user)
1127                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1128
1129                 r = user_stop(user);
1130                 if (r < 0)
1131                         return bus_send_error_reply(connection, message, NULL, r);
1132
1133                 reply = dbus_message_new_method_return(message);
1134                 if (!reply)
1135                         goto oom;
1136
1137         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSeat")) {
1138                 const char *name;
1139                 Seat *seat;
1140
1141                 if (!dbus_message_get_args(
1142                                     message,
1143                                     &error,
1144                                     DBUS_TYPE_STRING, &name,
1145                                     DBUS_TYPE_INVALID))
1146                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1147
1148                 seat = hashmap_get(m->seats, name);
1149                 if (!seat)
1150                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1151
1152                 r = seat_stop_sessions(seat);
1153                 if (r < 0)
1154                         return bus_send_error_reply(connection, message, NULL, r);
1155
1156                 reply = dbus_message_new_method_return(message);
1157                 if (!reply)
1158                         goto oom;
1159
1160         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "SetUserLinger")) {
1161                 uint32_t uid;
1162                 struct passwd *pw;
1163                 dbus_bool_t b, interactive;
1164                 char *path;
1165
1166                 if (!dbus_message_get_args(
1167                                     message,
1168                                     &error,
1169                                     DBUS_TYPE_UINT32, &uid,
1170                                     DBUS_TYPE_BOOLEAN, &b,
1171                                     DBUS_TYPE_BOOLEAN, &interactive,
1172                                     DBUS_TYPE_INVALID))
1173                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1174
1175                 errno = 0;
1176                 pw = getpwuid(uid);
1177                 if (!pw)
1178                         return bus_send_error_reply(connection, message, NULL, errno ? -errno : -EINVAL);
1179
1180                 r = verify_polkit(connection, message, "org.freedesktop.login1.set-user-linger", interactive, &error);
1181                 if (r < 0)
1182                         return bus_send_error_reply(connection, message, &error, r);
1183
1184                 r = safe_mkdir("/var/lib/systemd/linger", 0755, 0, 0);
1185                 if (r < 0)
1186                         return bus_send_error_reply(connection, message, &error, r);
1187
1188                 path = strappend("/var/lib/systemd/linger/", pw->pw_name);
1189                 if (!path)
1190                         goto oom;
1191
1192                 if (b) {
1193                         User *u;
1194
1195                         r = touch(path);
1196                         free(path);
1197
1198                         if (r < 0)
1199                                 return bus_send_error_reply(connection, message, &error, r);
1200
1201                         if (manager_add_user_by_uid(m, uid, &u) >= 0)
1202                                 user_start(u);
1203
1204                 } else {
1205                         User *u;
1206
1207                         r = unlink(path);
1208                         free(path);
1209
1210                         if (r < 0 && errno != ENOENT)
1211                                 return bus_send_error_reply(connection, message, &error, -errno);
1212
1213                         u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
1214                         if (u)
1215                                 user_add_to_gc_queue(u);
1216                 }
1217
1218                 reply = dbus_message_new_method_return(message);
1219                 if (!reply)
1220                         goto oom;
1221
1222         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "AttachDevice")) {
1223                 const char *sysfs, *seat;
1224                 dbus_bool_t interactive;
1225
1226                 if (!dbus_message_get_args(
1227                                     message,
1228                                     &error,
1229                                     DBUS_TYPE_STRING, &seat,
1230                                     DBUS_TYPE_STRING, &sysfs,
1231                                     DBUS_TYPE_BOOLEAN, &interactive,
1232                                     DBUS_TYPE_INVALID))
1233                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1234
1235                 if (!path_startswith(sysfs, "/sys") || !seat_name_is_valid(seat))
1236                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1237
1238                 r = verify_polkit(connection, message, "org.freedesktop.login1.attach-device", interactive, &error);
1239                 if (r < 0)
1240                         return bus_send_error_reply(connection, message, &error, r);
1241
1242                 r = attach_device(m, seat, sysfs);
1243                 if (r < 0)
1244                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1245
1246                 reply = dbus_message_new_method_return(message);
1247                 if (!reply)
1248                         goto oom;
1249
1250
1251         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "FlushDevices")) {
1252                 dbus_bool_t interactive;
1253
1254                 if (!dbus_message_get_args(
1255                                     message,
1256                                     &error,
1257                                     DBUS_TYPE_BOOLEAN, &interactive,
1258                                     DBUS_TYPE_INVALID))
1259                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1260
1261                 r = verify_polkit(connection, message, "org.freedesktop.login1.flush-devices", interactive, &error);
1262                 if (r < 0)
1263                         return bus_send_error_reply(connection, message, &error, r);
1264
1265                 r = flush_devices(m);
1266                 if (r < 0)
1267                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1268
1269                 reply = dbus_message_new_method_return(message);
1270                 if (!reply)
1271                         goto oom;
1272
1273         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "PowerOff") ||
1274                    dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "Reboot")) {
1275                 dbus_bool_t interactive;
1276                 bool multiple_sessions;
1277                 DBusMessage *forward, *freply;
1278                 const char *name;
1279                 const char *mode = "replace";
1280                 const char *action;
1281
1282                 if (!dbus_message_get_args(
1283                                     message,
1284                                     &error,
1285                                     DBUS_TYPE_BOOLEAN, &interactive,
1286                                     DBUS_TYPE_INVALID))
1287                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1288
1289                 multiple_sessions = hashmap_size(m->sessions) > 1;
1290
1291                 if (!multiple_sessions) {
1292                         Session *s;
1293
1294                         /* Hmm, there's only one session, but let's
1295                          * make sure it actually belongs to the user
1296                          * who is asking. If not, better be safe than
1297                          * sorry. */
1298
1299                         s = hashmap_first(m->sessions);
1300                         if (s) {
1301                                 unsigned long ul;
1302
1303                                 ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), &error);
1304                                 if (ul == (unsigned long) -1)
1305                                         return bus_send_error_reply(connection, message, &error, -EIO);
1306
1307                                 multiple_sessions = s->user->uid != ul;
1308                         }
1309                 }
1310
1311                 if (streq(dbus_message_get_member(message), "PowerOff")) {
1312                         if (multiple_sessions)
1313                                 action = "org.freedesktop.login1.power-off-multiple-sessions";
1314                         else
1315                                 action = "org.freedesktop.login1.power-off";
1316
1317                         name = SPECIAL_POWEROFF_TARGET;
1318                 } else {
1319                         if (multiple_sessions)
1320                                 action = "org.freedesktop.login1.reboot-multiple-sessions";
1321                         else
1322                                 action = "org.freedesktop.login1.reboot";
1323
1324                         name = SPECIAL_REBOOT_TARGET;
1325                 }
1326
1327                 r = verify_polkit(connection, message, action, interactive, &error);
1328                 if (r < 0)
1329                         return bus_send_error_reply(connection, message, &error, r);
1330
1331                 forward = dbus_message_new_method_call(
1332                               "org.freedesktop.systemd1",
1333                               "/org/freedesktop/systemd1",
1334                               "org.freedesktop.systemd1.Manager",
1335                               "StartUnit");
1336                 if (!forward)
1337                         return bus_send_error_reply(connection, message, NULL, -ENOMEM);
1338
1339                 if (!dbus_message_append_args(forward,
1340                                               DBUS_TYPE_STRING, &name,
1341                                               DBUS_TYPE_STRING, &mode,
1342                                               DBUS_TYPE_INVALID)) {
1343                         dbus_message_unref(forward);
1344                         return bus_send_error_reply(connection, message, NULL, -ENOMEM);
1345                 }
1346
1347                 freply = dbus_connection_send_with_reply_and_block(connection, forward, -1, &error);
1348                 dbus_message_unref(forward);
1349
1350                 if (!freply)
1351                         return bus_send_error_reply(connection, message, &error, -EIO);
1352
1353                 dbus_message_unref(freply);
1354
1355                 reply = dbus_message_new_method_return(message);
1356                 if (!reply)
1357                         goto oom;
1358
1359         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
1360                 char *introspection = NULL;
1361                 FILE *f;
1362                 Iterator i;
1363                 Session *session;
1364                 Seat *seat;
1365                 User *user;
1366                 size_t size;
1367                 char *p;
1368
1369                 if (!(reply = dbus_message_new_method_return(message)))
1370                         goto oom;
1371
1372                 /* We roll our own introspection code here, instead of
1373                  * relying on bus_default_message_handler() because we
1374                  * need to generate our introspection string
1375                  * dynamically. */
1376
1377                 if (!(f = open_memstream(&introspection, &size)))
1378                         goto oom;
1379
1380                 fputs(INTROSPECTION_BEGIN, f);
1381
1382                 HASHMAP_FOREACH(seat, m->seats, i) {
1383                         p = bus_path_escape(seat->id);
1384
1385                         if (p) {
1386                                 fprintf(f, "<node name=\"seat/%s\"/>", p);
1387                                 free(p);
1388                         }
1389                 }
1390
1391                 HASHMAP_FOREACH(user, m->users, i)
1392                         fprintf(f, "<node name=\"user/%llu\"/>", (unsigned long long) user->uid);
1393
1394                 HASHMAP_FOREACH(session, m->sessions, i) {
1395                         p = bus_path_escape(session->id);
1396
1397                         if (p) {
1398                                 fprintf(f, "<node name=\"session/%s\"/>", p);
1399                                 free(p);
1400                         }
1401                 }
1402
1403                 fputs(INTROSPECTION_END, f);
1404
1405                 if (ferror(f)) {
1406                         fclose(f);
1407                         free(introspection);
1408                         goto oom;
1409                 }
1410
1411                 fclose(f);
1412
1413                 if (!introspection)
1414                         goto oom;
1415
1416                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
1417                         free(introspection);
1418                         goto oom;
1419                 }
1420
1421                 free(introspection);
1422         } else
1423                 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, properties);
1424
1425         if (reply) {
1426                 if (!dbus_connection_send(connection, reply, NULL))
1427                         goto oom;
1428
1429                 dbus_message_unref(reply);
1430         }
1431
1432         return DBUS_HANDLER_RESULT_HANDLED;
1433
1434 oom:
1435         if (reply)
1436                 dbus_message_unref(reply);
1437
1438         dbus_error_free(&error);
1439
1440         return DBUS_HANDLER_RESULT_NEED_MEMORY;
1441 }
1442
1443 const DBusObjectPathVTable bus_manager_vtable = {
1444         .message_function = manager_message_handler
1445 };
1446
1447 DBusHandlerResult bus_message_filter(
1448                 DBusConnection *connection,
1449                 DBusMessage *message,
1450                 void *userdata) {
1451
1452         Manager *m = userdata;
1453         DBusError error;
1454
1455         assert(m);
1456         assert(connection);
1457         assert(message);
1458
1459         dbus_error_init(&error);
1460
1461         if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
1462                 const char *cgroup;
1463
1464                 if (!dbus_message_get_args(message, &error,
1465                                            DBUS_TYPE_STRING, &cgroup,
1466                                            DBUS_TYPE_INVALID))
1467                         log_error("Failed to parse Released message: %s", bus_error_message(&error));
1468                 else
1469                         manager_cgroup_notify_empty(m, cgroup);
1470         }
1471
1472         dbus_error_free(&error);
1473
1474         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1475 }
1476
1477 int manager_send_changed(Manager *manager, const char *properties) {
1478         DBusMessage *m;
1479         int r = -ENOMEM;
1480
1481         assert(manager);
1482
1483         m = bus_properties_changed_new("/org/freedesktop/login1", "org.freedesktop.login1.Manager", properties);
1484         if (!m)
1485                 goto finish;
1486
1487         if (!dbus_connection_send(manager->bus, m, NULL))
1488                 goto finish;
1489
1490         r = 0;
1491
1492 finish:
1493         if (m)
1494                 dbus_message_unref(m);
1495
1496         return r;
1497 }