src/core/dbus-unit.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2010 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "sd-bus.h"
  21
  22 #include "alloc-util.h"
  23 #include "bus-common-errors.h"
  24 #include "cgroup-util.h"
  25 #include "dbus-unit.h"
  26 #include "dbus.h"
  27 #include "locale-util.h"
  28 #include "log.h"
  29 #include "selinux-access.h"
  30 #include "special.h"
  31 #include "string-util.h"
  32 #include "strv.h"
  33 #include "user-util.h"
  34
  35 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_load_state, unit_load_state, UnitLoadState);
  36 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_job_mode, job_mode, JobMode);
  37 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_failure_action, failure_action, FailureAction);
  38
  39 static int property_get_names(
  40                 sd_bus *bus,
  41                 const char *path,
  42                 const char *interface,
  43                 const char *property,
  44                 sd_bus_message *reply,
  45                 void *userdata,
  46                 sd_bus_error *error) {
  47
  48         Unit *u = userdata;
  49         Iterator i;
  50         const char *t;
  51         int r;
  52
  53         assert(bus);
  54         assert(reply);
  55         assert(u);
  56
  57         r = sd_bus_message_open_container(reply, 'a', "s");
  58         if (r < 0)
  59                 return r;
  60
  61         SET_FOREACH(t, u->names, i) {
  62                 r = sd_bus_message_append(reply, "s", t);
  63                 if (r < 0)
  64                         return r;
  65         }
  66
  67         return sd_bus_message_close_container(reply);
  68 }
  69
  70 static int property_get_following(
  71                 sd_bus *bus,
  72                 const char *path,
  73                 const char *interface,
  74                 const char *property,
  75                 sd_bus_message *reply,
  76                 void *userdata,
  77                 sd_bus_error *error) {
  78
  79         Unit *u = userdata, *f;
  80
  81         assert(bus);
  82         assert(reply);
  83         assert(u);
  84
  85         f = unit_following(u);
  86         return sd_bus_message_append(reply, "s", f ? f->id : "");
  87 }
  88
  89 static int property_get_dependencies(
  90                 sd_bus *bus,
  91                 const char *path,
  92                 const char *interface,
  93                 const char *property,
  94                 sd_bus_message *reply,
  95                 void *userdata,
  96                 sd_bus_error *error) {
  97
  98         Set *s = *(Set**) userdata;
  99         Iterator j;
 100         Unit *u;
 101         int r;
 102
 103         assert(bus);
 104         assert(reply);
 105
 106         r = sd_bus_message_open_container(reply, 'a', "s");
 107         if (r < 0)
 108                 return r;
 109
 110         SET_FOREACH(u, s, j) {
 111                 r = sd_bus_message_append(reply, "s", u->id);
 112                 if (r < 0)
 113                         return r;
 114         }
 115
 116         return sd_bus_message_close_container(reply);
 117 }
 118
 119 static int property_get_obsolete_dependencies(
 120                 sd_bus *bus,
 121                 const char *path,
 122                 const char *interface,
 123                 const char *property,
 124                 sd_bus_message *reply,
 125                 void *userdata,
 126                 sd_bus_error *error) {
 127
 128         assert(bus);
 129         assert(reply);
 130
 131         /* For dependency types we don't support anymore always return an empty array */
 132         return sd_bus_message_append(reply, "as", 0);
 133 }
 134
 135 static int property_get_description(
 136                 sd_bus *bus,
 137                 const char *path,
 138                 const char *interface,
 139                 const char *property,
 140                 sd_bus_message *reply,
 141                 void *userdata,
 142                 sd_bus_error *error) {
 143
 144         Unit *u = userdata;
 145
 146         assert(bus);
 147         assert(reply);
 148         assert(u);
 149
 150         return sd_bus_message_append(reply, "s", unit_description(u));
 151 }
 152
 153 static int property_get_active_state(
 154                 sd_bus *bus,
 155                 const char *path,
 156                 const char *interface,
 157                 const char *property,
 158                 sd_bus_message *reply,
 159                 void *userdata,
 160                 sd_bus_error *error) {
 161
 162         Unit *u = userdata;
 163
 164         assert(bus);
 165         assert(reply);
 166         assert(u);
 167
 168         return sd_bus_message_append(reply, "s", unit_active_state_to_string(unit_active_state(u)));
 169 }
 170
 171 static int property_get_sub_state(
 172                 sd_bus *bus,
 173                 const char *path,
 174                 const char *interface,
 175                 const char *property,
 176                 sd_bus_message *reply,
 177                 void *userdata,
 178                 sd_bus_error *error) {
 179
 180         Unit *u = userdata;
 181
 182         assert(bus);
 183         assert(reply);
 184         assert(u);
 185
 186         return sd_bus_message_append(reply, "s", unit_sub_state_to_string(u));
 187 }
 188
 189 static int property_get_unit_file_preset(
 190                 sd_bus *bus,
 191                 const char *path,
 192                 const char *interface,
 193                 const char *property,
 194                 sd_bus_message *reply,
 195                 void *userdata,
 196                 sd_bus_error *error) {
 197
 198         Unit *u = userdata;
 199         int r;
 200
 201         assert(bus);
 202         assert(reply);
 203         assert(u);
 204
 205         r = unit_get_unit_file_preset(u);
 206
 207         return sd_bus_message_append(reply, "s",
 208                                      r < 0 ? "":
 209                                      r > 0 ? "enabled" : "disabled");
 210 }
 211
 212 static int property_get_unit_file_state(
 213                 sd_bus *bus,
 214                 const char *path,
 215                 const char *interface,
 216                 const char *property,
 217                 sd_bus_message *reply,
 218                 void *userdata,
 219                 sd_bus_error *error) {
 220
 221         Unit *u = userdata;
 222
 223         assert(bus);
 224         assert(reply);
 225         assert(u);
 226
 227         return sd_bus_message_append(reply, "s", unit_file_state_to_string(unit_get_unit_file_state(u)));
 228 }
 229
 230 static int property_get_can_start(
 231                 sd_bus *bus,
 232                 const char *path,
 233                 const char *interface,
 234                 const char *property,
 235                 sd_bus_message *reply,
 236                 void *userdata,
 237                 sd_bus_error *error) {
 238
 239         Unit *u = userdata;
 240
 241         assert(bus);
 242         assert(reply);
 243         assert(u);
 244
 245         return sd_bus_message_append(reply, "b", unit_can_start(u) && !u->refuse_manual_start);
 246 }
 247
 248 static int property_get_can_stop(
 249                 sd_bus *bus,
 250                 const char *path,
 251                 const char *interface,
 252                 const char *property,
 253                 sd_bus_message *reply,
 254                 void *userdata,
 255                 sd_bus_error *error) {
 256
 257         Unit *u = userdata;
 258
 259         assert(bus);
 260         assert(reply);
 261         assert(u);
 262
 263         /* On the lower levels we assume that every unit we can start
 264          * we can also stop */
 265
 266         return sd_bus_message_append(reply, "b", unit_can_start(u) && !u->refuse_manual_stop);
 267 }
 268
 269 static int property_get_can_reload(
 270                 sd_bus *bus,
 271                 const char *path,
 272                 const char *interface,
 273                 const char *property,
 274                 sd_bus_message *reply,
 275                 void *userdata,
 276                 sd_bus_error *error) {
 277
 278         Unit *u = userdata;
 279
 280         assert(bus);
 281         assert(reply);
 282         assert(u);
 283
 284         return sd_bus_message_append(reply, "b", unit_can_reload(u));
 285 }
 286
 287 static int property_get_can_isolate(
 288                 sd_bus *bus,
 289                 const char *path,
 290                 const char *interface,
 291                 const char *property,
 292                 sd_bus_message *reply,
 293                 void *userdata,
 294                 sd_bus_error *error) {
 295
 296         Unit *u = userdata;
 297
 298         assert(bus);
 299         assert(reply);
 300         assert(u);
 301
 302         return sd_bus_message_append(reply, "b", unit_can_isolate(u) && !u->refuse_manual_start);
 303 }
 304
 305 static int property_get_job(
 306                 sd_bus *bus,
 307                 const char *path,
 308                 const char *interface,
 309                 const char *property,
 310                 sd_bus_message *reply,
 311                 void *userdata,
 312                 sd_bus_error *error) {
 313
 314         _cleanup_free_ char *p = NULL;
 315         Unit *u = userdata;
 316
 317         assert(bus);
 318         assert(reply);
 319         assert(u);
 320
 321         if (!u->job)
 322                 return sd_bus_message_append(reply, "(uo)", 0, "/");
 323
 324         p = job_dbus_path(u->job);
 325         if (!p)
 326                 return -ENOMEM;
 327
 328         return sd_bus_message_append(reply, "(uo)", u->job->id, p);
 329 }
 330
 331 static int property_get_need_daemon_reload(
 332                 sd_bus *bus,
 333                 const char *path,
 334                 const char *interface,
 335                 const char *property,
 336                 sd_bus_message *reply,
 337                 void *userdata,
 338                 sd_bus_error *error) {
 339
 340         Unit *u = userdata;
 341
 342         assert(bus);
 343         assert(reply);
 344         assert(u);
 345
 346         return sd_bus_message_append(reply, "b", unit_need_daemon_reload(u));
 347 }
 348
 349 static int property_get_conditions(
 350                 sd_bus *bus,
 351                 const char *path,
 352                 const char *interface,
 353                 const char *property,
 354                 sd_bus_message *reply,
 355                 void *userdata,
 356                 sd_bus_error *error) {
 357
 358         const char *(*to_string)(ConditionType type) = NULL;
 359         Condition **list = userdata, *c;
 360         int r;
 361
 362         assert(bus);
 363         assert(reply);
 364         assert(list);
 365
 366         to_string = streq(property, "Asserts") ? assert_type_to_string : condition_type_to_string;
 367
 368         r = sd_bus_message_open_container(reply, 'a', "(sbbsi)");
 369         if (r < 0)
 370                 return r;
 371
 372         LIST_FOREACH(conditions, c, *list) {
 373                 int tristate;
 374
 375                 tristate =
 376                         c->result == CONDITION_UNTESTED ? 0 :
 377                         c->result == CONDITION_SUCCEEDED ? 1 : -1;
 378
 379                 r = sd_bus_message_append(reply, "(sbbsi)",
 380                                           to_string(c->type),
 381                                           c->trigger, c->negate,
 382                                           c->parameter, tristate);
 383                 if (r < 0)
 384                         return r;
 385
 386         }
 387
 388         return sd_bus_message_close_container(reply);
 389 }
 390
 391 static int property_get_load_error(
 392                 sd_bus *bus,
 393                 const char *path,
 394                 const char *interface,
 395                 const char *property,
 396                 sd_bus_message *reply,
 397                 void *userdata,
 398                 sd_bus_error *error) {
 399
 400         _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
 401         Unit *u = userdata;
 402
 403         assert(bus);
 404         assert(reply);
 405         assert(u);
 406
 407         if (u->load_error != 0)
 408                 sd_bus_error_set_errno(&e, u->load_error);
 409
 410         return sd_bus_message_append(reply, "(ss)", e.name, e.message);
 411 }
 412
 413 static int bus_verify_manage_units_async_full(
 414                 Unit *u,
 415                 const char *verb,
 416                 int capability,
 417                 const char *polkit_message,
 418                 sd_bus_message *call,
 419                 sd_bus_error *error) {
 420
 421         const char *details[9] = {
 422                 "unit", u->id,
 423                 "verb", verb,
 424         };
 425
 426         if (polkit_message) {
 427                 details[4] = "polkit.message";
 428                 details[5] = polkit_message;
 429                 details[6] = "polkit.gettext_domain";
 430                 details[7] = GETTEXT_PACKAGE;
 431         }
 432
 433         return bus_verify_polkit_async(call, capability, "org.freedesktop.systemd1.manage-units", details, false, UID_INVALID, &u->manager->polkit_registry, error);
 434 }
 435
 436 int bus_unit_method_start_generic(
 437                 sd_bus_message *message,
 438                 Unit *u,
 439                 JobType job_type,
 440                 bool reload_if_possible,
 441                 sd_bus_error *error) {
 442
 443         const char *smode;
 444         JobMode mode;
 445         _cleanup_free_ char *verb = NULL;
 446         static const char *const polkit_message_for_job[_JOB_TYPE_MAX] = {
 447                 [JOB_START]       = N_("Authentication is required to start '$(unit)'."),
 448                 [JOB_STOP]        = N_("Authentication is required to stop '$(unit)'."),
 449                 [JOB_RELOAD]      = N_("Authentication is required to reload '$(unit)'."),
 450                 [JOB_RESTART]     = N_("Authentication is required to restart '$(unit)'."),
 451                 [JOB_TRY_RESTART] = N_("Authentication is required to restart '$(unit)'."),
 452         };
 453         int r;
 454
 455         assert(message);
 456         assert(u);
 457         assert(job_type >= 0 && job_type < _JOB_TYPE_MAX);
 458
 459         r = mac_selinux_unit_access_check(
 460                         u, message,
 461                         job_type_to_access_method(job_type),
 462                         error);
 463         if (r < 0)
 464                 return r;
 465
 466         r = sd_bus_message_read(message, "s", &smode);
 467         if (r < 0)
 468                 return r;
 469
 470         mode = job_mode_from_string(smode);
 471         if (mode < 0)
 472                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job mode %s invalid", smode);
 473
 474         if (reload_if_possible)
 475                 verb = strjoin("reload-or-", job_type_to_string(job_type), NULL);
 476         else
 477                 verb = strdup(job_type_to_string(job_type));
 478         if (!verb)
 479                 return -ENOMEM;
 480
 481         r = bus_verify_manage_units_async_full(
 482                         u,
 483                         verb,
 484                         CAP_SYS_ADMIN,
 485                         job_type < _JOB_TYPE_MAX ? polkit_message_for_job[job_type] : NULL,
 486                         message,
 487                         error);
 488         if (r < 0)
 489                 return r;
 490         if (r == 0)
 491                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 492
 493         return bus_unit_queue_job(message, u, job_type, mode, reload_if_possible, error);
 494 }
 495
 496 static int method_start(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 497         return bus_unit_method_start_generic(message, userdata, JOB_START, false, error);
 498 }
 499
 500 static int method_stop(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 501         return bus_unit_method_start_generic(message, userdata, JOB_STOP, false, error);
 502 }
 503
 504 static int method_reload(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 505         return bus_unit_method_start_generic(message, userdata, JOB_RELOAD, false, error);
 506 }
 507
 508 static int method_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 509         return bus_unit_method_start_generic(message, userdata, JOB_RESTART, false, error);
 510 }
 511
 512 static int method_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 513         return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, false, error);
 514 }
 515
 516 static int method_reload_or_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 517         return bus_unit_method_start_generic(message, userdata, JOB_RESTART, true, error);
 518 }
 519
 520 static int method_reload_or_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 521         return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, true, error);
 522 }
 523
 524 int bus_unit_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 525         Unit *u = userdata;
 526         const char *swho;
 527         int32_t signo;
 528         KillWho who;
 529         int r;
 530
 531         assert(message);
 532         assert(u);
 533
 534         r = mac_selinux_unit_access_check(u, message, "stop", error);
 535         if (r < 0)
 536                 return r;
 537
 538         r = sd_bus_message_read(message, "si", &swho, &signo);
 539         if (r < 0)
 540                 return r;
 541
 542         if (isempty(swho))
 543                 who = KILL_ALL;
 544         else {
 545                 who = kill_who_from_string(swho);
 546                 if (who < 0)
 547                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid who argument %s", swho);
 548         }
 549
 550         if (signo <= 0 || signo >= _NSIG)
 551                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Signal number out of range.");
 552
 553         r = bus_verify_manage_units_async_full(
 554                         u,
 555                         "kill",
 556                         CAP_KILL,
 557                         N_("Authentication is required to kill '$(unit)'."),
 558                         message,
 559                         error);
 560         if (r < 0)
 561                 return r;
 562         if (r == 0)
 563                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 564
 565         r = unit_kill(u, who, signo, error);
 566         if (r < 0)
 567                 return r;
 568
 569         return sd_bus_reply_method_return(message, NULL);
 570 }
 571
 572 int bus_unit_method_reset_failed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 573         Unit *u = userdata;
 574         int r;
 575
 576         assert(message);
 577         assert(u);
 578
 579         r = mac_selinux_unit_access_check(u, message, "reload", error);
 580         if (r < 0)
 581                 return r;
 582
 583         r = bus_verify_manage_units_async_full(
 584                         u,
 585                         "reset-failed",
 586                         CAP_SYS_ADMIN,
 587                         N_("Authentication is required to reset the \"failed\" state of '$(unit)'."),
 588                         message,
 589                         error);
 590         if (r < 0)
 591                 return r;
 592         if (r == 0)
 593                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 594
 595         unit_reset_failed(u);
 596
 597         return sd_bus_reply_method_return(message, NULL);
 598 }
 599
 600 int bus_unit_method_set_properties(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 601         Unit *u = userdata;
 602         int runtime, r;
 603
 604         assert(message);
 605         assert(u);
 606
 607         r = mac_selinux_unit_access_check(u, message, "start", error);
 608         if (r < 0)
 609                 return r;
 610
 611         r = sd_bus_message_read(message, "b", &runtime);
 612         if (r < 0)
 613                 return r;
 614
 615         r = bus_verify_manage_units_async_full(
 616                         u,
 617                         "set-property",
 618                         CAP_SYS_ADMIN,
 619                         N_("Authentication is required to set properties on '$(unit)'."),
 620                         message,
 621                         error);
 622         if (r < 0)
 623                 return r;
 624         if (r == 0)
 625                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 626
 627         r = bus_unit_set_properties(u, message, runtime ? UNIT_RUNTIME : UNIT_PERSISTENT, true, error);
 628         if (r < 0)
 629                 return r;
 630
 631         return sd_bus_reply_method_return(message, NULL);
 632 }
 633
 634 const sd_bus_vtable bus_unit_vtable[] = {
 635         SD_BUS_VTABLE_START(0),
 636
 637         SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Unit, id), SD_BUS_VTABLE_PROPERTY_CONST),
 638         SD_BUS_PROPERTY("Names", "as", property_get_names, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 639         SD_BUS_PROPERTY("Following", "s", property_get_following, 0, 0),
 640         SD_BUS_PROPERTY("Requires", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRES]), SD_BUS_VTABLE_PROPERTY_CONST),
 641         SD_BUS_PROPERTY("Requisite", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE]), SD_BUS_VTABLE_PROPERTY_CONST),
 642         SD_BUS_PROPERTY("Wants", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_WANTS]), SD_BUS_VTABLE_PROPERTY_CONST),
 643         SD_BUS_PROPERTY("BindsTo", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BINDS_TO]), SD_BUS_VTABLE_PROPERTY_CONST),
 644         SD_BUS_PROPERTY("PartOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_PART_OF]), SD_BUS_VTABLE_PROPERTY_CONST),
 645         SD_BUS_PROPERTY("RequiredBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 646         SD_BUS_PROPERTY("RequisiteOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE_OF]), SD_BUS_VTABLE_PROPERTY_CONST),
 647         SD_BUS_PROPERTY("WantedBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_WANTED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 648         SD_BUS_PROPERTY("BoundBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BOUND_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 649         SD_BUS_PROPERTY("ConsistsOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONSISTS_OF]), SD_BUS_VTABLE_PROPERTY_CONST),
 650         SD_BUS_PROPERTY("Conflicts", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONFLICTS]), SD_BUS_VTABLE_PROPERTY_CONST),
 651         SD_BUS_PROPERTY("ConflictedBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONFLICTED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 652         SD_BUS_PROPERTY("Before", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BEFORE]), SD_BUS_VTABLE_PROPERTY_CONST),
 653         SD_BUS_PROPERTY("After", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_AFTER]), SD_BUS_VTABLE_PROPERTY_CONST),
 654         SD_BUS_PROPERTY("OnFailure", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_ON_FAILURE]), SD_BUS_VTABLE_PROPERTY_CONST),
 655         SD_BUS_PROPERTY("Triggers", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_TRIGGERS]), SD_BUS_VTABLE_PROPERTY_CONST),
 656         SD_BUS_PROPERTY("TriggeredBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_TRIGGERED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 657         SD_BUS_PROPERTY("PropagatesReloadTo", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_PROPAGATES_RELOAD_TO]), SD_BUS_VTABLE_PROPERTY_CONST),
 658         SD_BUS_PROPERTY("ReloadPropagatedFrom", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_RELOAD_PROPAGATED_FROM]), SD_BUS_VTABLE_PROPERTY_CONST),
 659         SD_BUS_PROPERTY("JoinsNamespaceOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_JOINS_NAMESPACE_OF]), SD_BUS_VTABLE_PROPERTY_CONST),
 660         SD_BUS_PROPERTY("RequiresOverridable", "as", property_get_obsolete_dependencies, 0, SD_BUS_VTABLE_HIDDEN),
 661         SD_BUS_PROPERTY("RequisiteOverridable", "as", property_get_obsolete_dependencies, 0, SD_BUS_VTABLE_HIDDEN),
 662         SD_BUS_PROPERTY("RequiredByOverridable", "as", property_get_obsolete_dependencies, 0, SD_BUS_VTABLE_HIDDEN),
 663         SD_BUS_PROPERTY("RequisiteOfOverridable", "as", property_get_obsolete_dependencies, 0, SD_BUS_VTABLE_HIDDEN),
 664         SD_BUS_PROPERTY("RequiresMountsFor", "as", NULL, offsetof(Unit, requires_mounts_for), SD_BUS_VTABLE_PROPERTY_CONST),
 665         SD_BUS_PROPERTY("Documentation", "as", NULL, offsetof(Unit, documentation), SD_BUS_VTABLE_PROPERTY_CONST),
 666         SD_BUS_PROPERTY("Description", "s", property_get_description, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 667         SD_BUS_PROPERTY("LoadState", "s", property_get_load_state, offsetof(Unit, load_state), SD_BUS_VTABLE_PROPERTY_CONST),
 668         SD_BUS_PROPERTY("ActiveState", "s", property_get_active_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 669         SD_BUS_PROPERTY("SubState", "s", property_get_sub_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 670         SD_BUS_PROPERTY("FragmentPath", "s", NULL, offsetof(Unit, fragment_path), SD_BUS_VTABLE_PROPERTY_CONST),
 671         SD_BUS_PROPERTY("SourcePath", "s", NULL, offsetof(Unit, source_path), SD_BUS_VTABLE_PROPERTY_CONST),
 672         SD_BUS_PROPERTY("DropInPaths", "as", NULL, offsetof(Unit, dropin_paths), SD_BUS_VTABLE_PROPERTY_CONST),
 673         SD_BUS_PROPERTY("UnitFileState", "s", property_get_unit_file_state, 0, 0),
 674         SD_BUS_PROPERTY("UnitFilePreset", "s", property_get_unit_file_preset, 0, 0),
 675         BUS_PROPERTY_DUAL_TIMESTAMP("StateChangeTimestamp", offsetof(Unit, state_change_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 676         BUS_PROPERTY_DUAL_TIMESTAMP("InactiveExitTimestamp", offsetof(Unit, inactive_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 677         BUS_PROPERTY_DUAL_TIMESTAMP("ActiveEnterTimestamp", offsetof(Unit, active_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 678         BUS_PROPERTY_DUAL_TIMESTAMP("ActiveExitTimestamp", offsetof(Unit, active_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 679         BUS_PROPERTY_DUAL_TIMESTAMP("InactiveEnterTimestamp", offsetof(Unit, inactive_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 680         SD_BUS_PROPERTY("CanStart", "b", property_get_can_start, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 681         SD_BUS_PROPERTY("CanStop", "b", property_get_can_stop, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 682         SD_BUS_PROPERTY("CanReload", "b", property_get_can_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 683         SD_BUS_PROPERTY("CanIsolate", "b", property_get_can_isolate, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 684         SD_BUS_PROPERTY("Job", "(uo)", property_get_job, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 685         SD_BUS_PROPERTY("StopWhenUnneeded", "b", bus_property_get_bool, offsetof(Unit, stop_when_unneeded), SD_BUS_VTABLE_PROPERTY_CONST),
 686         SD_BUS_PROPERTY("RefuseManualStart", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_start), SD_BUS_VTABLE_PROPERTY_CONST),
 687         SD_BUS_PROPERTY("RefuseManualStop", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_stop), SD_BUS_VTABLE_PROPERTY_CONST),
 688         SD_BUS_PROPERTY("AllowIsolate", "b", bus_property_get_bool, offsetof(Unit, allow_isolate), SD_BUS_VTABLE_PROPERTY_CONST),
 689         SD_BUS_PROPERTY("DefaultDependencies", "b", bus_property_get_bool, offsetof(Unit, default_dependencies), SD_BUS_VTABLE_PROPERTY_CONST),
 690         SD_BUS_PROPERTY("OnFailureJobMode", "s", property_get_job_mode, offsetof(Unit, on_failure_job_mode), SD_BUS_VTABLE_PROPERTY_CONST),
 691         SD_BUS_PROPERTY("IgnoreOnIsolate", "b", bus_property_get_bool, offsetof(Unit, ignore_on_isolate), SD_BUS_VTABLE_PROPERTY_CONST),
 692         SD_BUS_PROPERTY("NeedDaemonReload", "b", property_get_need_daemon_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 693         SD_BUS_PROPERTY("JobTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_timeout), SD_BUS_VTABLE_PROPERTY_CONST),
 694         SD_BUS_PROPERTY("JobTimeoutAction", "s", property_get_failure_action, offsetof(Unit, job_timeout_action), SD_BUS_VTABLE_PROPERTY_CONST),
 695         SD_BUS_PROPERTY("JobTimeoutRebootArgument", "s", NULL, offsetof(Unit, job_timeout_reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
 696         SD_BUS_PROPERTY("ConditionResult", "b", bus_property_get_bool, offsetof(Unit, condition_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 697         SD_BUS_PROPERTY("AssertResult", "b", bus_property_get_bool, offsetof(Unit, assert_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 698         BUS_PROPERTY_DUAL_TIMESTAMP("ConditionTimestamp", offsetof(Unit, condition_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 699         BUS_PROPERTY_DUAL_TIMESTAMP("AssertTimestamp", offsetof(Unit, assert_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 700         SD_BUS_PROPERTY("Conditions", "a(sbbsi)", property_get_conditions, offsetof(Unit, conditions), 0),
 701         SD_BUS_PROPERTY("Asserts", "a(sbbsi)", property_get_conditions, offsetof(Unit, asserts), 0),
 702         SD_BUS_PROPERTY("LoadError", "(ss)", property_get_load_error, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 703         SD_BUS_PROPERTY("Transient", "b", bus_property_get_bool, offsetof(Unit, transient), SD_BUS_VTABLE_PROPERTY_CONST),
 704         SD_BUS_PROPERTY("NetClass", "u", NULL, offsetof(Unit, cgroup_netclass_id), 0),
 705         SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Unit, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST),
 706         SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Unit, start_limit.burst), SD_BUS_VTABLE_PROPERTY_CONST),
 707         SD_BUS_PROPERTY("StartLimitAction", "s", property_get_failure_action, offsetof(Unit, start_limit_action), SD_BUS_VTABLE_PROPERTY_CONST),
 708         SD_BUS_PROPERTY("RebootArgument", "s", NULL, offsetof(Unit, reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
 709
 710         SD_BUS_METHOD("Start", "s", "o", method_start, SD_BUS_VTABLE_UNPRIVILEGED),
 711         SD_BUS_METHOD("Stop", "s", "o", method_stop, SD_BUS_VTABLE_UNPRIVILEGED),
 712         SD_BUS_METHOD("Reload", "s", "o", method_reload, SD_BUS_VTABLE_UNPRIVILEGED),
 713         SD_BUS_METHOD("Restart", "s", "o", method_restart, SD_BUS_VTABLE_UNPRIVILEGED),
 714         SD_BUS_METHOD("TryRestart", "s", "o", method_try_restart, SD_BUS_VTABLE_UNPRIVILEGED),
 715         SD_BUS_METHOD("ReloadOrRestart", "s", "o", method_reload_or_restart, SD_BUS_VTABLE_UNPRIVILEGED),
 716         SD_BUS_METHOD("ReloadOrTryRestart", "s", "o", method_reload_or_try_restart, SD_BUS_VTABLE_UNPRIVILEGED),
 717         SD_BUS_METHOD("Kill", "si", NULL, bus_unit_method_kill, SD_BUS_VTABLE_UNPRIVILEGED),
 718         SD_BUS_METHOD("ResetFailed", NULL, NULL, bus_unit_method_reset_failed, SD_BUS_VTABLE_UNPRIVILEGED),
 719         SD_BUS_METHOD("SetProperties", "ba(sv)", NULL, bus_unit_method_set_properties, SD_BUS_VTABLE_UNPRIVILEGED),
 720
 721         SD_BUS_VTABLE_END
 722 };
 723
 724 static int property_get_slice(
 725                 sd_bus *bus,
 726                 const char *path,
 727                 const char *interface,
 728                 const char *property,
 729                 sd_bus_message *reply,
 730                 void *userdata,
 731                 sd_bus_error *error) {
 732
 733         Unit *u = userdata;
 734
 735         assert(bus);
 736         assert(reply);
 737         assert(u);
 738
 739         return sd_bus_message_append(reply, "s", unit_slice_name(u));
 740 }
 741
 742 static int property_get_current_memory(
 743                 sd_bus *bus,
 744                 const char *path,
 745                 const char *interface,
 746                 const char *property,
 747                 sd_bus_message *reply,
 748                 void *userdata,
 749                 sd_bus_error *error) {
 750
 751         uint64_t sz = (uint64_t) -1;
 752         Unit *u = userdata;
 753         int r;
 754
 755         assert(bus);
 756         assert(reply);
 757         assert(u);
 758
 759         r = unit_get_memory_current(u, &sz);
 760         if (r < 0 && r != -ENODATA)
 761                 log_unit_warning_errno(u, r, "Failed to get memory.usage_in_bytes attribute: %m");
 762
 763         return sd_bus_message_append(reply, "t", sz);
 764 }
 765
 766 static int property_get_current_tasks(
 767                 sd_bus *bus,
 768                 const char *path,
 769                 const char *interface,
 770                 const char *property,
 771                 sd_bus_message *reply,
 772                 void *userdata,
 773                 sd_bus_error *error) {
 774
 775         uint64_t cn = (uint64_t) -1;
 776         Unit *u = userdata;
 777         int r;
 778
 779         assert(bus);
 780         assert(reply);
 781         assert(u);
 782
 783         r = unit_get_tasks_current(u, &cn);
 784         if (r < 0 && r != -ENODATA)
 785                 log_unit_warning_errno(u, r, "Failed to get pids.current attribute: %m");
 786
 787         return sd_bus_message_append(reply, "t", cn);
 788 }
 789
 790 static int property_get_cpu_usage(
 791                 sd_bus *bus,
 792                 const char *path,
 793                 const char *interface,
 794                 const char *property,
 795                 sd_bus_message *reply,
 796                 void *userdata,
 797                 sd_bus_error *error) {
 798
 799         nsec_t ns = (nsec_t) -1;
 800         Unit *u = userdata;
 801         int r;
 802
 803         assert(bus);
 804         assert(reply);
 805         assert(u);
 806
 807         r = unit_get_cpu_usage(u, &ns);
 808         if (r < 0 && r != -ENODATA)
 809                 log_unit_warning_errno(u, r, "Failed to get cpuacct.usage attribute: %m");
 810
 811         return sd_bus_message_append(reply, "t", ns);
 812 }
 813
 814 static int property_get_cgroup(
 815                 sd_bus *bus,
 816                 const char *path,
 817                 const char *interface,
 818                 const char *property,
 819                 sd_bus_message *reply,
 820                 void *userdata,
 821                 sd_bus_error *error) {
 822
 823         Unit *u = userdata;
 824         const char *t;
 825
 826         assert(bus);
 827         assert(reply);
 828         assert(u);
 829
 830         /* Three cases: a) u->cgroup_path is NULL, in which case the
 831          * unit has no control group, which we report as the empty
 832          * string. b) u->cgroup_path is the empty string, which
 833          * indicates the root cgroup, which we report as "/". c) all
 834          * other cases we report as-is. */
 835
 836         if (u->cgroup_path)
 837                 t = isempty(u->cgroup_path) ? "/" : u->cgroup_path;
 838         else
 839                 t = "";
 840
 841         return sd_bus_message_append(reply, "s", t);
 842 }
 843
 844 const sd_bus_vtable bus_unit_cgroup_vtable[] = {
 845         SD_BUS_VTABLE_START(0),
 846         SD_BUS_PROPERTY("Slice", "s", property_get_slice, 0, 0),
 847         SD_BUS_PROPERTY("ControlGroup", "s", property_get_cgroup, 0, 0),
 848         SD_BUS_PROPERTY("MemoryCurrent", "t", property_get_current_memory, 0, 0),
 849         SD_BUS_PROPERTY("CPUUsageNSec", "t", property_get_cpu_usage, 0, 0),
 850         SD_BUS_PROPERTY("TasksCurrent", "t", property_get_current_tasks, 0, 0),
 851         SD_BUS_VTABLE_END
 852 };
 853
 854 static int send_new_signal(sd_bus *bus, void *userdata) {
 855         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
 856         _cleanup_free_ char *p = NULL;
 857         Unit *u = userdata;
 858         int r;
 859
 860         assert(bus);
 861         assert(u);
 862
 863         p = unit_dbus_path(u);
 864         if (!p)
 865                 return -ENOMEM;
 866
 867         r = sd_bus_message_new_signal(
 868                         bus,
 869                         &m,
 870                         "/org/freedesktop/systemd1",
 871                         "org.freedesktop.systemd1.Manager",
 872                         "UnitNew");
 873         if (r < 0)
 874                 return r;
 875
 876         r = sd_bus_message_append(m, "so", u->id, p);
 877         if (r < 0)
 878                 return r;
 879
 880         return sd_bus_send(bus, m, NULL);
 881 }
 882
 883 static int send_changed_signal(sd_bus *bus, void *userdata) {
 884         _cleanup_free_ char *p = NULL;
 885         Unit *u = userdata;
 886         int r;
 887
 888         assert(bus);
 889         assert(u);
 890
 891         p = unit_dbus_path(u);
 892         if (!p)
 893                 return -ENOMEM;
 894
 895         /* Send a properties changed signal. First for the specific
 896          * type, then for the generic unit. The clients may rely on
 897          * this order to get atomic behavior if needed. */
 898
 899         r = sd_bus_emit_properties_changed_strv(
 900                         bus, p,
 901                         unit_dbus_interface_from_type(u->type),
 902                         NULL);
 903         if (r < 0)
 904                 return r;
 905
 906         return sd_bus_emit_properties_changed_strv(
 907                         bus, p,
 908                         "org.freedesktop.systemd1.Unit",
 909                         NULL);
 910 }
 911
 912 void bus_unit_send_change_signal(Unit *u) {
 913         int r;
 914         assert(u);
 915
 916         if (u->in_dbus_queue) {
 917                 LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u);
 918                 u->in_dbus_queue = false;
 919         }
 920
 921         if (!u->id)
 922                 return;
 923
 924         r = bus_foreach_bus(u->manager, NULL, u->sent_dbus_new_signal ? send_changed_signal : send_new_signal, u);
 925         if (r < 0)
 926                 log_unit_debug_errno(u, r, "Failed to send unit change signal for %s: %m", u->id);
 927
 928         u->sent_dbus_new_signal = true;
 929 }
 930
 931 static int send_removed_signal(sd_bus *bus, void *userdata) {
 932         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
 933         _cleanup_free_ char *p = NULL;
 934         Unit *u = userdata;
 935         int r;
 936
 937         assert(bus);
 938         assert(u);
 939
 940         p = unit_dbus_path(u);
 941         if (!p)
 942                 return -ENOMEM;
 943
 944         r = sd_bus_message_new_signal(
 945                         bus,
 946                         &m,
 947                         "/org/freedesktop/systemd1",
 948                         "org.freedesktop.systemd1.Manager",
 949                         "UnitRemoved");
 950         if (r < 0)
 951                 return r;
 952
 953         r = sd_bus_message_append(m, "so", u->id, p);
 954         if (r < 0)
 955                 return r;
 956
 957         return sd_bus_send(bus, m, NULL);
 958 }
 959
 960 void bus_unit_send_removed_signal(Unit *u) {
 961         int r;
 962         assert(u);
 963
 964         if (!u->sent_dbus_new_signal)
 965                 bus_unit_send_change_signal(u);
 966
 967         if (!u->id)
 968                 return;
 969
 970         r = bus_foreach_bus(u->manager, NULL, send_removed_signal, u);
 971         if (r < 0)
 972                 log_unit_debug_errno(u, r, "Failed to send unit remove signal for %s: %m", u->id);
 973 }
 974
 975 int bus_unit_queue_job(
 976                 sd_bus_message *message,
 977                 Unit *u,
 978                 JobType type,
 979                 JobMode mode,
 980                 bool reload_if_possible,
 981                 sd_bus_error *error) {
 982
 983         _cleanup_free_ char *path = NULL;
 984         Job *j;
 985         int r;
 986
 987         assert(message);
 988         assert(u);
 989         assert(type >= 0 && type < _JOB_TYPE_MAX);
 990         assert(mode >= 0 && mode < _JOB_MODE_MAX);
 991
 992         r = mac_selinux_unit_access_check(
 993                         u, message,
 994                         job_type_to_access_method(type),
 995                         error);
 996         if (r < 0)
 997                 return r;
 998
 999         if (reload_if_possible && unit_can_reload(u)) {
1000                 if (type == JOB_RESTART)
1001                         type = JOB_RELOAD_OR_START;
1002                 else if (type == JOB_TRY_RESTART)
1003                         type = JOB_TRY_RELOAD;
1004         }
1005
1006
1007         if (type == JOB_STOP &&
1008             (u->load_state == UNIT_NOT_FOUND || u->load_state == UNIT_ERROR) &&
1009             unit_active_state(u) == UNIT_INACTIVE)
1010                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not loaded.", u->id);
1011
1012         if ((type == JOB_START && u->refuse_manual_start) ||
1013             (type == JOB_STOP && u->refuse_manual_stop) ||
1014             ((type == JOB_RESTART || type == JOB_TRY_RESTART) && (u->refuse_manual_start || u->refuse_manual_stop)) ||
1015             (type == JOB_RELOAD_OR_START && job_type_collapse(type, u) == JOB_START && u->refuse_manual_start))
1016                 return sd_bus_error_setf(error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, unit %s may be requested by dependency only.", u->id);
1017
1018         r = manager_add_job(u->manager, type, u, mode, error, &j);
1019         if (r < 0)
1020                 return r;
1021
1022         if (sd_bus_message_get_bus(message) == u->manager->api_bus) {
1023                 if (!j->clients) {
1024                         r = sd_bus_track_new(sd_bus_message_get_bus(message), &j->clients, NULL, NULL);
1025                         if (r < 0)
1026                                 return r;
1027                 }
1028
1029                 r = sd_bus_track_add_sender(j->clients, message);
1030                 if (r < 0)
1031                         return r;
1032         }
1033
1034         path = job_dbus_path(j);
1035         if (!path)
1036                 return -ENOMEM;
1037
1038         return sd_bus_reply_method_return(message, "o", path);
1039 }
1040
1041 static int bus_unit_set_transient_property(
1042                 Unit *u,
1043                 const char *name,
1044                 sd_bus_message *message,
1045                 UnitSetPropertiesMode mode,
1046                 sd_bus_error *error) {
1047
1048         int r;
1049
1050         assert(u);
1051         assert(name);
1052         assert(message);
1053
1054         if (streq(name, "Description")) {
1055                 const char *d;
1056
1057                 r = sd_bus_message_read(message, "s", &d);
1058                 if (r < 0)
1059                         return r;
1060
1061                 if (mode != UNIT_CHECK) {
1062                         r = unit_set_description(u, d);
1063                         if (r < 0)
1064                                 return r;
1065
1066                         unit_write_drop_in_format(u, mode, name, "[Unit]\nDescription=%s\n", d);
1067                 }
1068
1069                 return 1;
1070
1071         } else if (streq(name, "DefaultDependencies")) {
1072                 int b;
1073
1074                 r = sd_bus_message_read(message, "b", &b);
1075                 if (r < 0)
1076                         return r;
1077
1078                 if (mode != UNIT_CHECK) {
1079                         u->default_dependencies = b;
1080                         unit_write_drop_in_format(u, mode, name, "[Unit]\nDefaultDependencies=%s\n", yes_no(b));
1081                 }
1082
1083                 return 1;
1084
1085         } else if (streq(name, "Slice")) {
1086                 Unit *slice;
1087                 const char *s;
1088
1089                 if (!UNIT_HAS_CGROUP_CONTEXT(u))
1090                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "The slice property is only available for units with control groups.");
1091                 if (u->type == UNIT_SLICE)
1092                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Slice may not be set for slice units.");
1093                 if (unit_has_name(u, SPECIAL_INIT_SCOPE))
1094                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot set slice for init.scope");
1095
1096                 r = sd_bus_message_read(message, "s", &s);
1097                 if (r < 0)
1098                         return r;
1099
1100                 if (!unit_name_is_valid(s, UNIT_NAME_PLAIN))
1101                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name '%s'", s);
1102
1103                 r = manager_load_unit(u->manager, s, NULL, error, &slice);
1104                 if (r < 0)
1105                         return r;
1106
1107                 if (slice->type != UNIT_SLICE)
1108                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unit name '%s' is not a slice", s);
1109
1110                 if (mode != UNIT_CHECK) {
1111                         r = unit_set_slice(u, slice);
1112                         if (r < 0)
1113                                 return r;
1114
1115                         unit_write_drop_in_private_format(u, mode, name, "Slice=%s\n", s);
1116                 }
1117
1118                 return 1;
1119
1120         } else if (STR_IN_SET(name,
1121                               "Requires", "RequiresOverridable",
1122                               "Requisite", "RequisiteOverridable",
1123                               "Wants",
1124                               "BindsTo",
1125                               "Conflicts",
1126                               "Before", "After",
1127                               "OnFailure",
1128                               "PropagatesReloadTo", "ReloadPropagatedFrom",
1129                               "PartOf")) {
1130
1131                 UnitDependency d;
1132                 const char *other;
1133
1134                 if (streq(name, "RequiresOverridable"))
1135                         d = UNIT_REQUIRES; /* redirect for obsolete unit dependency type */
1136                 else if (streq(name, "RequisiteOverridable"))
1137                         d = UNIT_REQUISITE; /* same here */
1138                 else {
1139                         d = unit_dependency_from_string(name);
1140                         if (d < 0)
1141                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit dependency: %s", name);
1142                 }
1143
1144                 r = sd_bus_message_enter_container(message, 'a', "s");
1145                 if (r < 0)
1146                         return r;
1147
1148                 while ((r = sd_bus_message_read(message, "s", &other)) > 0) {
1149                         if (!unit_name_is_valid(other, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))
1150                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name %s", other);
1151
1152                         if (mode != UNIT_CHECK) {
1153                                 _cleanup_free_ char *label = NULL;
1154
1155                                 r = unit_add_dependency_by_name(u, d, other, NULL, true);
1156                                 if (r < 0)
1157                                         return r;
1158
1159                                 label = strjoin(name, "-", other, NULL);
1160                                 if (!label)
1161                                         return -ENOMEM;
1162
1163                                 unit_write_drop_in_format(u, mode, label, "[Unit]\n%s=%s\n", name, other);
1164                         }
1165
1166                 }
1167                 if (r < 0)
1168                         return r;
1169
1170                 r = sd_bus_message_exit_container(message);
1171                 if (r < 0)
1172                         return r;
1173
1174                 return 1;
1175         }
1176
1177         return 0;
1178 }
1179
1180 int bus_unit_set_properties(
1181                 Unit *u,
1182                 sd_bus_message *message,
1183                 UnitSetPropertiesMode mode,
1184                 bool commit,
1185                 sd_bus_error *error) {
1186
1187         bool for_real = false;
1188         unsigned n = 0;
1189         int r;
1190
1191         assert(u);
1192         assert(message);
1193
1194         /* We iterate through the array twice. First run we just check
1195          * if all passed data is valid, second run actually applies
1196          * it. This is to implement transaction-like behaviour without
1197          * actually providing full transactions. */
1198
1199         r = sd_bus_message_enter_container(message, 'a', "(sv)");
1200         if (r < 0)
1201                 return r;
1202
1203         for (;;) {
1204                 const char *name;
1205
1206                 r = sd_bus_message_enter_container(message, 'r', "sv");
1207                 if (r < 0)
1208                         return r;
1209                 if (r == 0) {
1210                         if (for_real || mode == UNIT_CHECK)
1211                                 break;
1212
1213                         /* Reached EOF. Let's try again, and this time for realz... */
1214                         r = sd_bus_message_rewind(message, false);
1215                         if (r < 0)
1216                                 return r;
1217
1218                         for_real = true;
1219                         continue;
1220                 }
1221
1222                 r = sd_bus_message_read(message, "s", &name);
1223                 if (r < 0)
1224                         return r;
1225
1226                 if (!UNIT_VTABLE(u)->bus_set_property)
1227                         return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Objects of this type do not support setting properties.");
1228
1229                 r = sd_bus_message_enter_container(message, 'v', NULL);
1230                 if (r < 0)
1231                         return r;
1232
1233                 r = UNIT_VTABLE(u)->bus_set_property(u, name, message, for_real ? mode : UNIT_CHECK, error);
1234                 if (r == 0 && u->transient && u->load_state == UNIT_STUB)
1235                         r = bus_unit_set_transient_property(u, name, message, for_real ? mode : UNIT_CHECK, error);
1236                 if (r < 0)
1237                         return r;
1238                 if (r == 0)
1239                         return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Cannot set property %s, or unknown property.", name);
1240
1241                 r = sd_bus_message_exit_container(message);
1242                 if (r < 0)
1243                         return r;
1244
1245                 r = sd_bus_message_exit_container(message);
1246                 if (r < 0)
1247                         return r;
1248
1249                 n += for_real;
1250         }
1251
1252         r = sd_bus_message_exit_container(message);
1253         if (r < 0)
1254                 return r;
1255
1256         if (commit && n > 0 && UNIT_VTABLE(u)->bus_commit_properties)
1257                 UNIT_VTABLE(u)->bus_commit_properties(u);
1258
1259         return n;
1260 }
1261
1262 int bus_unit_check_load_state(Unit *u, sd_bus_error *error) {
1263
1264         if (u->load_state == UNIT_LOADED)
1265                 return 0;
1266
1267         /* Give a better description of the unit error when
1268          * possible. Note that in the case of UNIT_MASKED, load_error
1269          * is not set. */
1270         if (u->load_state == UNIT_MASKED)
1271                 return sd_bus_error_setf(error, BUS_ERROR_UNIT_MASKED, "Unit %s is masked.", u->id);
1272
1273         if (u->load_state == UNIT_NOT_FOUND)
1274                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not found.", u->id);
1275
1276         return sd_bus_error_set_errnof(error, u->load_error, "Unit %s is not loaded properly: %m.", u->id);
1277 }