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 "fd-util.h"
  28 #include "locale-util.h"
  29 #include "log.h"
  30 #include "process-util.h"
  31 #include "selinux-access.h"
  32 #include "signal-util.h"
  33 #include "special.h"
  34 #include "string-util.h"
  35 #include "strv.h"
  36 #include "user-util.h"
  37
  38 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_load_state, unit_load_state, UnitLoadState);
  39 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_job_mode, job_mode, JobMode);
  40 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_failure_action, failure_action, FailureAction);
  41
  42 static int property_get_names(
  43                 sd_bus *bus,
  44                 const char *path,
  45                 const char *interface,
  46                 const char *property,
  47                 sd_bus_message *reply,
  48                 void *userdata,
  49                 sd_bus_error *error) {
  50
  51         Unit *u = userdata;
  52         Iterator i;
  53         const char *t;
  54         int r;
  55
  56         assert(bus);
  57         assert(reply);
  58         assert(u);
  59
  60         r = sd_bus_message_open_container(reply, 'a', "s");
  61         if (r < 0)
  62                 return r;
  63
  64         SET_FOREACH(t, u->names, i) {
  65                 r = sd_bus_message_append(reply, "s", t);
  66                 if (r < 0)
  67                         return r;
  68         }
  69
  70         return sd_bus_message_close_container(reply);
  71 }
  72
  73 static int property_get_following(
  74                 sd_bus *bus,
  75                 const char *path,
  76                 const char *interface,
  77                 const char *property,
  78                 sd_bus_message *reply,
  79                 void *userdata,
  80                 sd_bus_error *error) {
  81
  82         Unit *u = userdata, *f;
  83
  84         assert(bus);
  85         assert(reply);
  86         assert(u);
  87
  88         f = unit_following(u);
  89         return sd_bus_message_append(reply, "s", f ? f->id : "");
  90 }
  91
  92 static int property_get_dependencies(
  93                 sd_bus *bus,
  94                 const char *path,
  95                 const char *interface,
  96                 const char *property,
  97                 sd_bus_message *reply,
  98                 void *userdata,
  99                 sd_bus_error *error) {
 100
 101         Set *s = *(Set**) userdata;
 102         Iterator j;
 103         Unit *u;
 104         int r;
 105
 106         assert(bus);
 107         assert(reply);
 108
 109         r = sd_bus_message_open_container(reply, 'a', "s");
 110         if (r < 0)
 111                 return r;
 112
 113         SET_FOREACH(u, s, j) {
 114                 r = sd_bus_message_append(reply, "s", u->id);
 115                 if (r < 0)
 116                         return r;
 117         }
 118
 119         return sd_bus_message_close_container(reply);
 120 }
 121
 122 static int property_get_obsolete_dependencies(
 123                 sd_bus *bus,
 124                 const char *path,
 125                 const char *interface,
 126                 const char *property,
 127                 sd_bus_message *reply,
 128                 void *userdata,
 129                 sd_bus_error *error) {
 130
 131         assert(bus);
 132         assert(reply);
 133
 134         /* For dependency types we don't support anymore always return an empty array */
 135         return sd_bus_message_append(reply, "as", 0);
 136 }
 137
 138 static int property_get_description(
 139                 sd_bus *bus,
 140                 const char *path,
 141                 const char *interface,
 142                 const char *property,
 143                 sd_bus_message *reply,
 144                 void *userdata,
 145                 sd_bus_error *error) {
 146
 147         Unit *u = userdata;
 148
 149         assert(bus);
 150         assert(reply);
 151         assert(u);
 152
 153         return sd_bus_message_append(reply, "s", unit_description(u));
 154 }
 155
 156 static int property_get_active_state(
 157                 sd_bus *bus,
 158                 const char *path,
 159                 const char *interface,
 160                 const char *property,
 161                 sd_bus_message *reply,
 162                 void *userdata,
 163                 sd_bus_error *error) {
 164
 165         Unit *u = userdata;
 166
 167         assert(bus);
 168         assert(reply);
 169         assert(u);
 170
 171         return sd_bus_message_append(reply, "s", unit_active_state_to_string(unit_active_state(u)));
 172 }
 173
 174 static int property_get_sub_state(
 175                 sd_bus *bus,
 176                 const char *path,
 177                 const char *interface,
 178                 const char *property,
 179                 sd_bus_message *reply,
 180                 void *userdata,
 181                 sd_bus_error *error) {
 182
 183         Unit *u = userdata;
 184
 185         assert(bus);
 186         assert(reply);
 187         assert(u);
 188
 189         return sd_bus_message_append(reply, "s", unit_sub_state_to_string(u));
 190 }
 191
 192 static int property_get_unit_file_preset(
 193                 sd_bus *bus,
 194                 const char *path,
 195                 const char *interface,
 196                 const char *property,
 197                 sd_bus_message *reply,
 198                 void *userdata,
 199                 sd_bus_error *error) {
 200
 201         Unit *u = userdata;
 202         int r;
 203
 204         assert(bus);
 205         assert(reply);
 206         assert(u);
 207
 208         r = unit_get_unit_file_preset(u);
 209
 210         return sd_bus_message_append(reply, "s",
 211                                      r < 0 ? "":
 212                                      r > 0 ? "enabled" : "disabled");
 213 }
 214
 215 static int property_get_unit_file_state(
 216                 sd_bus *bus,
 217                 const char *path,
 218                 const char *interface,
 219                 const char *property,
 220                 sd_bus_message *reply,
 221                 void *userdata,
 222                 sd_bus_error *error) {
 223
 224         Unit *u = userdata;
 225
 226         assert(bus);
 227         assert(reply);
 228         assert(u);
 229
 230         return sd_bus_message_append(reply, "s", unit_file_state_to_string(unit_get_unit_file_state(u)));
 231 }
 232
 233 static int property_get_can_start(
 234                 sd_bus *bus,
 235                 const char *path,
 236                 const char *interface,
 237                 const char *property,
 238                 sd_bus_message *reply,
 239                 void *userdata,
 240                 sd_bus_error *error) {
 241
 242         Unit *u = userdata;
 243
 244         assert(bus);
 245         assert(reply);
 246         assert(u);
 247
 248         return sd_bus_message_append(reply, "b", unit_can_start(u) && !u->refuse_manual_start);
 249 }
 250
 251 static int property_get_can_stop(
 252                 sd_bus *bus,
 253                 const char *path,
 254                 const char *interface,
 255                 const char *property,
 256                 sd_bus_message *reply,
 257                 void *userdata,
 258                 sd_bus_error *error) {
 259
 260         Unit *u = userdata;
 261
 262         assert(bus);
 263         assert(reply);
 264         assert(u);
 265
 266         /* On the lower levels we assume that every unit we can start
 267          * we can also stop */
 268
 269         return sd_bus_message_append(reply, "b", unit_can_start(u) && !u->refuse_manual_stop);
 270 }
 271
 272 static int property_get_can_reload(
 273                 sd_bus *bus,
 274                 const char *path,
 275                 const char *interface,
 276                 const char *property,
 277                 sd_bus_message *reply,
 278                 void *userdata,
 279                 sd_bus_error *error) {
 280
 281         Unit *u = userdata;
 282
 283         assert(bus);
 284         assert(reply);
 285         assert(u);
 286
 287         return sd_bus_message_append(reply, "b", unit_can_reload(u));
 288 }
 289
 290 static int property_get_can_isolate(
 291                 sd_bus *bus,
 292                 const char *path,
 293                 const char *interface,
 294                 const char *property,
 295                 sd_bus_message *reply,
 296                 void *userdata,
 297                 sd_bus_error *error) {
 298
 299         Unit *u = userdata;
 300
 301         assert(bus);
 302         assert(reply);
 303         assert(u);
 304
 305         return sd_bus_message_append(reply, "b", unit_can_isolate(u) && !u->refuse_manual_start);
 306 }
 307
 308 static int property_get_job(
 309                 sd_bus *bus,
 310                 const char *path,
 311                 const char *interface,
 312                 const char *property,
 313                 sd_bus_message *reply,
 314                 void *userdata,
 315                 sd_bus_error *error) {
 316
 317         _cleanup_free_ char *p = NULL;
 318         Unit *u = userdata;
 319
 320         assert(bus);
 321         assert(reply);
 322         assert(u);
 323
 324         if (!u->job)
 325                 return sd_bus_message_append(reply, "(uo)", 0, "/");
 326
 327         p = job_dbus_path(u->job);
 328         if (!p)
 329                 return -ENOMEM;
 330
 331         return sd_bus_message_append(reply, "(uo)", u->job->id, p);
 332 }
 333
 334 static int property_get_need_daemon_reload(
 335                 sd_bus *bus,
 336                 const char *path,
 337                 const char *interface,
 338                 const char *property,
 339                 sd_bus_message *reply,
 340                 void *userdata,
 341                 sd_bus_error *error) {
 342
 343         Unit *u = userdata;
 344
 345         assert(bus);
 346         assert(reply);
 347         assert(u);
 348
 349         return sd_bus_message_append(reply, "b", unit_need_daemon_reload(u));
 350 }
 351
 352 static int property_get_conditions(
 353                 sd_bus *bus,
 354                 const char *path,
 355                 const char *interface,
 356                 const char *property,
 357                 sd_bus_message *reply,
 358                 void *userdata,
 359                 sd_bus_error *error) {
 360
 361         const char *(*to_string)(ConditionType type) = NULL;
 362         Condition **list = userdata, *c;
 363         int r;
 364
 365         assert(bus);
 366         assert(reply);
 367         assert(list);
 368
 369         to_string = streq(property, "Asserts") ? assert_type_to_string : condition_type_to_string;
 370
 371         r = sd_bus_message_open_container(reply, 'a', "(sbbsi)");
 372         if (r < 0)
 373                 return r;
 374
 375         LIST_FOREACH(conditions, c, *list) {
 376                 int tristate;
 377
 378                 tristate =
 379                         c->result == CONDITION_UNTESTED ? 0 :
 380                         c->result == CONDITION_SUCCEEDED ? 1 : -1;
 381
 382                 r = sd_bus_message_append(reply, "(sbbsi)",
 383                                           to_string(c->type),
 384                                           c->trigger, c->negate,
 385                                           c->parameter, tristate);
 386                 if (r < 0)
 387                         return r;
 388
 389         }
 390
 391         return sd_bus_message_close_container(reply);
 392 }
 393
 394 static int property_get_load_error(
 395                 sd_bus *bus,
 396                 const char *path,
 397                 const char *interface,
 398                 const char *property,
 399                 sd_bus_message *reply,
 400                 void *userdata,
 401                 sd_bus_error *error) {
 402
 403         _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL;
 404         Unit *u = userdata;
 405
 406         assert(bus);
 407         assert(reply);
 408         assert(u);
 409
 410         if (u->load_error != 0)
 411                 sd_bus_error_set_errno(&e, u->load_error);
 412
 413         return sd_bus_message_append(reply, "(ss)", e.name, e.message);
 414 }
 415
 416 static int bus_verify_manage_units_async_full(
 417                 Unit *u,
 418                 const char *verb,
 419                 int capability,
 420                 const char *polkit_message,
 421                 sd_bus_message *call,
 422                 sd_bus_error *error) {
 423
 424         const char *details[9] = {
 425                 "unit", u->id,
 426                 "verb", verb,
 427         };
 428
 429         if (polkit_message) {
 430                 details[4] = "polkit.message";
 431                 details[5] = polkit_message;
 432                 details[6] = "polkit.gettext_domain";
 433                 details[7] = GETTEXT_PACKAGE;
 434         }
 435
 436         return bus_verify_polkit_async(call, capability, "org.freedesktop.systemd1.manage-units", details, false, UID_INVALID, &u->manager->polkit_registry, error);
 437 }
 438
 439 int bus_unit_method_start_generic(
 440                 sd_bus_message *message,
 441                 Unit *u,
 442                 JobType job_type,
 443                 bool reload_if_possible,
 444                 sd_bus_error *error) {
 445
 446         const char *smode;
 447         JobMode mode;
 448         _cleanup_free_ char *verb = NULL;
 449         static const char *const polkit_message_for_job[_JOB_TYPE_MAX] = {
 450                 [JOB_START]       = N_("Authentication is required to start '$(unit)'."),
 451                 [JOB_STOP]        = N_("Authentication is required to stop '$(unit)'."),
 452                 [JOB_RELOAD]      = N_("Authentication is required to reload '$(unit)'."),
 453                 [JOB_RESTART]     = N_("Authentication is required to restart '$(unit)'."),
 454                 [JOB_TRY_RESTART] = N_("Authentication is required to restart '$(unit)'."),
 455         };
 456         int r;
 457
 458         assert(message);
 459         assert(u);
 460         assert(job_type >= 0 && job_type < _JOB_TYPE_MAX);
 461
 462         r = mac_selinux_unit_access_check(
 463                         u, message,
 464                         job_type_to_access_method(job_type),
 465                         error);
 466         if (r < 0)
 467                 return r;
 468
 469         r = sd_bus_message_read(message, "s", &smode);
 470         if (r < 0)
 471                 return r;
 472
 473         mode = job_mode_from_string(smode);
 474         if (mode < 0)
 475                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job mode %s invalid", smode);
 476
 477         if (reload_if_possible)
 478                 verb = strjoin("reload-or-", job_type_to_string(job_type), NULL);
 479         else
 480                 verb = strdup(job_type_to_string(job_type));
 481         if (!verb)
 482                 return -ENOMEM;
 483
 484         r = bus_verify_manage_units_async_full(
 485                         u,
 486                         verb,
 487                         CAP_SYS_ADMIN,
 488                         job_type < _JOB_TYPE_MAX ? polkit_message_for_job[job_type] : NULL,
 489                         message,
 490                         error);
 491         if (r < 0)
 492                 return r;
 493         if (r == 0)
 494                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 495
 496         return bus_unit_queue_job(message, u, job_type, mode, reload_if_possible, error);
 497 }
 498
 499 static int method_start(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 500         return bus_unit_method_start_generic(message, userdata, JOB_START, false, error);
 501 }
 502
 503 static int method_stop(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 504         return bus_unit_method_start_generic(message, userdata, JOB_STOP, false, error);
 505 }
 506
 507 static int method_reload(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 508         return bus_unit_method_start_generic(message, userdata, JOB_RELOAD, false, error);
 509 }
 510
 511 static int method_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 512         return bus_unit_method_start_generic(message, userdata, JOB_RESTART, false, error);
 513 }
 514
 515 static int method_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 516         return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, false, error);
 517 }
 518
 519 static int method_reload_or_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 520         return bus_unit_method_start_generic(message, userdata, JOB_RESTART, true, error);
 521 }
 522
 523 static int method_reload_or_try_restart(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 524         return bus_unit_method_start_generic(message, userdata, JOB_TRY_RESTART, true, error);
 525 }
 526
 527 int bus_unit_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 528         Unit *u = userdata;
 529         const char *swho;
 530         int32_t signo;
 531         KillWho who;
 532         int r;
 533
 534         assert(message);
 535         assert(u);
 536
 537         r = mac_selinux_unit_access_check(u, message, "stop", error);
 538         if (r < 0)
 539                 return r;
 540
 541         r = sd_bus_message_read(message, "si", &swho, &signo);
 542         if (r < 0)
 543                 return r;
 544
 545         if (isempty(swho))
 546                 who = KILL_ALL;
 547         else {
 548                 who = kill_who_from_string(swho);
 549                 if (who < 0)
 550                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid who argument %s", swho);
 551         }
 552
 553         if (!SIGNAL_VALID(signo))
 554                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Signal number out of range.");
 555
 556         r = bus_verify_manage_units_async_full(
 557                         u,
 558                         "kill",
 559                         CAP_KILL,
 560                         N_("Authentication is required to kill '$(unit)'."),
 561                         message,
 562                         error);
 563         if (r < 0)
 564                 return r;
 565         if (r == 0)
 566                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 567
 568         r = unit_kill(u, who, signo, error);
 569         if (r < 0)
 570                 return r;
 571
 572         return sd_bus_reply_method_return(message, NULL);
 573 }
 574
 575 int bus_unit_method_reset_failed(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 576         Unit *u = userdata;
 577         int r;
 578
 579         assert(message);
 580         assert(u);
 581
 582         r = mac_selinux_unit_access_check(u, message, "reload", error);
 583         if (r < 0)
 584                 return r;
 585
 586         r = bus_verify_manage_units_async_full(
 587                         u,
 588                         "reset-failed",
 589                         CAP_SYS_ADMIN,
 590                         N_("Authentication is required to reset the \"failed\" state of '$(unit)'."),
 591                         message,
 592                         error);
 593         if (r < 0)
 594                 return r;
 595         if (r == 0)
 596                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 597
 598         unit_reset_failed(u);
 599
 600         return sd_bus_reply_method_return(message, NULL);
 601 }
 602
 603 int bus_unit_method_set_properties(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 604         Unit *u = userdata;
 605         int runtime, r;
 606
 607         assert(message);
 608         assert(u);
 609
 610         r = mac_selinux_unit_access_check(u, message, "start", error);
 611         if (r < 0)
 612                 return r;
 613
 614         r = sd_bus_message_read(message, "b", &runtime);
 615         if (r < 0)
 616                 return r;
 617
 618         r = bus_verify_manage_units_async_full(
 619                         u,
 620                         "set-property",
 621                         CAP_SYS_ADMIN,
 622                         N_("Authentication is required to set properties on '$(unit)'."),
 623                         message,
 624                         error);
 625         if (r < 0)
 626                 return r;
 627         if (r == 0)
 628                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 629
 630         r = bus_unit_set_properties(u, message, runtime ? UNIT_RUNTIME : UNIT_PERSISTENT, true, error);
 631         if (r < 0)
 632                 return r;
 633
 634         return sd_bus_reply_method_return(message, NULL);
 635 }
 636
 637 const sd_bus_vtable bus_unit_vtable[] = {
 638         SD_BUS_VTABLE_START(0),
 639
 640         SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Unit, id), SD_BUS_VTABLE_PROPERTY_CONST),
 641         SD_BUS_PROPERTY("Names", "as", property_get_names, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 642         SD_BUS_PROPERTY("Following", "s", property_get_following, 0, 0),
 643         SD_BUS_PROPERTY("Requires", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRES]), SD_BUS_VTABLE_PROPERTY_CONST),
 644         SD_BUS_PROPERTY("Requisite", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE]), SD_BUS_VTABLE_PROPERTY_CONST),
 645         SD_BUS_PROPERTY("Wants", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_WANTS]), SD_BUS_VTABLE_PROPERTY_CONST),
 646         SD_BUS_PROPERTY("BindsTo", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BINDS_TO]), SD_BUS_VTABLE_PROPERTY_CONST),
 647         SD_BUS_PROPERTY("PartOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_PART_OF]), SD_BUS_VTABLE_PROPERTY_CONST),
 648         SD_BUS_PROPERTY("RequiredBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 649         SD_BUS_PROPERTY("RequisiteOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE_OF]), SD_BUS_VTABLE_PROPERTY_CONST),
 650         SD_BUS_PROPERTY("WantedBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_WANTED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 651         SD_BUS_PROPERTY("BoundBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BOUND_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 652         SD_BUS_PROPERTY("ConsistsOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONSISTS_OF]), SD_BUS_VTABLE_PROPERTY_CONST),
 653         SD_BUS_PROPERTY("Conflicts", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONFLICTS]), SD_BUS_VTABLE_PROPERTY_CONST),
 654         SD_BUS_PROPERTY("ConflictedBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONFLICTED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 655         SD_BUS_PROPERTY("Before", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BEFORE]), SD_BUS_VTABLE_PROPERTY_CONST),
 656         SD_BUS_PROPERTY("After", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_AFTER]), SD_BUS_VTABLE_PROPERTY_CONST),
 657         SD_BUS_PROPERTY("OnFailure", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_ON_FAILURE]), SD_BUS_VTABLE_PROPERTY_CONST),
 658         SD_BUS_PROPERTY("Triggers", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_TRIGGERS]), SD_BUS_VTABLE_PROPERTY_CONST),
 659         SD_BUS_PROPERTY("TriggeredBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_TRIGGERED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),
 660         SD_BUS_PROPERTY("PropagatesReloadTo", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_PROPAGATES_RELOAD_TO]), SD_BUS_VTABLE_PROPERTY_CONST),
 661         SD_BUS_PROPERTY("ReloadPropagatedFrom", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_RELOAD_PROPAGATED_FROM]), SD_BUS_VTABLE_PROPERTY_CONST),
 662         SD_BUS_PROPERTY("JoinsNamespaceOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_JOINS_NAMESPACE_OF]), SD_BUS_VTABLE_PROPERTY_CONST),
 663         SD_BUS_PROPERTY("RequiresOverridable", "as", property_get_obsolete_dependencies, 0, SD_BUS_VTABLE_HIDDEN),
 664         SD_BUS_PROPERTY("RequisiteOverridable", "as", property_get_obsolete_dependencies, 0, SD_BUS_VTABLE_HIDDEN),
 665         SD_BUS_PROPERTY("RequiredByOverridable", "as", property_get_obsolete_dependencies, 0, SD_BUS_VTABLE_HIDDEN),
 666         SD_BUS_PROPERTY("RequisiteOfOverridable", "as", property_get_obsolete_dependencies, 0, SD_BUS_VTABLE_HIDDEN),
 667         SD_BUS_PROPERTY("RequiresMountsFor", "as", NULL, offsetof(Unit, requires_mounts_for), SD_BUS_VTABLE_PROPERTY_CONST),
 668         SD_BUS_PROPERTY("Documentation", "as", NULL, offsetof(Unit, documentation), SD_BUS_VTABLE_PROPERTY_CONST),
 669         SD_BUS_PROPERTY("Description", "s", property_get_description, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 670         SD_BUS_PROPERTY("LoadState", "s", property_get_load_state, offsetof(Unit, load_state), SD_BUS_VTABLE_PROPERTY_CONST),
 671         SD_BUS_PROPERTY("ActiveState", "s", property_get_active_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 672         SD_BUS_PROPERTY("SubState", "s", property_get_sub_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 673         SD_BUS_PROPERTY("FragmentPath", "s", NULL, offsetof(Unit, fragment_path), SD_BUS_VTABLE_PROPERTY_CONST),
 674         SD_BUS_PROPERTY("SourcePath", "s", NULL, offsetof(Unit, source_path), SD_BUS_VTABLE_PROPERTY_CONST),
 675         SD_BUS_PROPERTY("DropInPaths", "as", NULL, offsetof(Unit, dropin_paths), SD_BUS_VTABLE_PROPERTY_CONST),
 676         SD_BUS_PROPERTY("UnitFileState", "s", property_get_unit_file_state, 0, 0),
 677         SD_BUS_PROPERTY("UnitFilePreset", "s", property_get_unit_file_preset, 0, 0),
 678         BUS_PROPERTY_DUAL_TIMESTAMP("StateChangeTimestamp", offsetof(Unit, state_change_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 679         BUS_PROPERTY_DUAL_TIMESTAMP("InactiveExitTimestamp", offsetof(Unit, inactive_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 680         BUS_PROPERTY_DUAL_TIMESTAMP("ActiveEnterTimestamp", offsetof(Unit, active_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 681         BUS_PROPERTY_DUAL_TIMESTAMP("ActiveExitTimestamp", offsetof(Unit, active_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 682         BUS_PROPERTY_DUAL_TIMESTAMP("InactiveEnterTimestamp", offsetof(Unit, inactive_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 683         SD_BUS_PROPERTY("CanStart", "b", property_get_can_start, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 684         SD_BUS_PROPERTY("CanStop", "b", property_get_can_stop, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 685         SD_BUS_PROPERTY("CanReload", "b", property_get_can_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 686         SD_BUS_PROPERTY("CanIsolate", "b", property_get_can_isolate, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 687         SD_BUS_PROPERTY("Job", "(uo)", property_get_job, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 688         SD_BUS_PROPERTY("StopWhenUnneeded", "b", bus_property_get_bool, offsetof(Unit, stop_when_unneeded), SD_BUS_VTABLE_PROPERTY_CONST),
 689         SD_BUS_PROPERTY("RefuseManualStart", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_start), SD_BUS_VTABLE_PROPERTY_CONST),
 690         SD_BUS_PROPERTY("RefuseManualStop", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_stop), SD_BUS_VTABLE_PROPERTY_CONST),
 691         SD_BUS_PROPERTY("AllowIsolate", "b", bus_property_get_bool, offsetof(Unit, allow_isolate), SD_BUS_VTABLE_PROPERTY_CONST),
 692         SD_BUS_PROPERTY("DefaultDependencies", "b", bus_property_get_bool, offsetof(Unit, default_dependencies), SD_BUS_VTABLE_PROPERTY_CONST),
 693         SD_BUS_PROPERTY("OnFailureJobMode", "s", property_get_job_mode, offsetof(Unit, on_failure_job_mode), SD_BUS_VTABLE_PROPERTY_CONST),
 694         SD_BUS_PROPERTY("IgnoreOnIsolate", "b", bus_property_get_bool, offsetof(Unit, ignore_on_isolate), SD_BUS_VTABLE_PROPERTY_CONST),
 695         SD_BUS_PROPERTY("NeedDaemonReload", "b", property_get_need_daemon_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 696         SD_BUS_PROPERTY("JobTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_timeout), SD_BUS_VTABLE_PROPERTY_CONST),
 697         SD_BUS_PROPERTY("JobTimeoutAction", "s", property_get_failure_action, offsetof(Unit, job_timeout_action), SD_BUS_VTABLE_PROPERTY_CONST),
 698         SD_BUS_PROPERTY("JobTimeoutRebootArgument", "s", NULL, offsetof(Unit, job_timeout_reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
 699         SD_BUS_PROPERTY("ConditionResult", "b", bus_property_get_bool, offsetof(Unit, condition_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 700         SD_BUS_PROPERTY("AssertResult", "b", bus_property_get_bool, offsetof(Unit, assert_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 701         BUS_PROPERTY_DUAL_TIMESTAMP("ConditionTimestamp", offsetof(Unit, condition_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 702         BUS_PROPERTY_DUAL_TIMESTAMP("AssertTimestamp", offsetof(Unit, assert_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 703         SD_BUS_PROPERTY("Conditions", "a(sbbsi)", property_get_conditions, offsetof(Unit, conditions), 0),
 704         SD_BUS_PROPERTY("Asserts", "a(sbbsi)", property_get_conditions, offsetof(Unit, asserts), 0),
 705         SD_BUS_PROPERTY("LoadError", "(ss)", property_get_load_error, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 706         SD_BUS_PROPERTY("Transient", "b", bus_property_get_bool, offsetof(Unit, transient), SD_BUS_VTABLE_PROPERTY_CONST),
 707         SD_BUS_PROPERTY("StartLimitIntervalSec", "t", bus_property_get_usec, offsetof(Unit, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST),
 708         SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Unit, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN), /* obsolete alias name */
 709         SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Unit, start_limit.burst), SD_BUS_VTABLE_PROPERTY_CONST),
 710         SD_BUS_PROPERTY("StartLimitAction", "s", property_get_failure_action, offsetof(Unit, start_limit_action), SD_BUS_VTABLE_PROPERTY_CONST),
 711         SD_BUS_PROPERTY("RebootArgument", "s", NULL, offsetof(Unit, reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST),
 712
 713         SD_BUS_METHOD("Start", "s", "o", method_start, SD_BUS_VTABLE_UNPRIVILEGED),
 714         SD_BUS_METHOD("Stop", "s", "o", method_stop, SD_BUS_VTABLE_UNPRIVILEGED),
 715         SD_BUS_METHOD("Reload", "s", "o", method_reload, SD_BUS_VTABLE_UNPRIVILEGED),
 716         SD_BUS_METHOD("Restart", "s", "o", method_restart, SD_BUS_VTABLE_UNPRIVILEGED),
 717         SD_BUS_METHOD("TryRestart", "s", "o", method_try_restart, SD_BUS_VTABLE_UNPRIVILEGED),
 718         SD_BUS_METHOD("ReloadOrRestart", "s", "o", method_reload_or_restart, SD_BUS_VTABLE_UNPRIVILEGED),
 719         SD_BUS_METHOD("ReloadOrTryRestart", "s", "o", method_reload_or_try_restart, SD_BUS_VTABLE_UNPRIVILEGED),
 720         SD_BUS_METHOD("Kill", "si", NULL, bus_unit_method_kill, SD_BUS_VTABLE_UNPRIVILEGED),
 721         SD_BUS_METHOD("ResetFailed", NULL, NULL, bus_unit_method_reset_failed, SD_BUS_VTABLE_UNPRIVILEGED),
 722         SD_BUS_METHOD("SetProperties", "ba(sv)", NULL, bus_unit_method_set_properties, SD_BUS_VTABLE_UNPRIVILEGED),
 723
 724         SD_BUS_VTABLE_END
 725 };
 726
 727 static int property_get_slice(
 728                 sd_bus *bus,
 729                 const char *path,
 730                 const char *interface,
 731                 const char *property,
 732                 sd_bus_message *reply,
 733                 void *userdata,
 734                 sd_bus_error *error) {
 735
 736         Unit *u = userdata;
 737
 738         assert(bus);
 739         assert(reply);
 740         assert(u);
 741
 742         return sd_bus_message_append(reply, "s", unit_slice_name(u));
 743 }
 744
 745 static int property_get_current_memory(
 746                 sd_bus *bus,
 747                 const char *path,
 748                 const char *interface,
 749                 const char *property,
 750                 sd_bus_message *reply,
 751                 void *userdata,
 752                 sd_bus_error *error) {
 753
 754         uint64_t sz = (uint64_t) -1;
 755         Unit *u = userdata;
 756         int r;
 757
 758         assert(bus);
 759         assert(reply);
 760         assert(u);
 761
 762         r = unit_get_memory_current(u, &sz);
 763         if (r < 0 && r != -ENODATA)
 764                 log_unit_warning_errno(u, r, "Failed to get memory.usage_in_bytes attribute: %m");
 765
 766         return sd_bus_message_append(reply, "t", sz);
 767 }
 768
 769 static int property_get_current_tasks(
 770                 sd_bus *bus,
 771                 const char *path,
 772                 const char *interface,
 773                 const char *property,
 774                 sd_bus_message *reply,
 775                 void *userdata,
 776                 sd_bus_error *error) {
 777
 778         uint64_t cn = (uint64_t) -1;
 779         Unit *u = userdata;
 780         int r;
 781
 782         assert(bus);
 783         assert(reply);
 784         assert(u);
 785
 786         r = unit_get_tasks_current(u, &cn);
 787         if (r < 0 && r != -ENODATA)
 788                 log_unit_warning_errno(u, r, "Failed to get pids.current attribute: %m");
 789
 790         return sd_bus_message_append(reply, "t", cn);
 791 }
 792
 793 static int property_get_cpu_usage(
 794                 sd_bus *bus,
 795                 const char *path,
 796                 const char *interface,
 797                 const char *property,
 798                 sd_bus_message *reply,
 799                 void *userdata,
 800                 sd_bus_error *error) {
 801
 802         nsec_t ns = (nsec_t) -1;
 803         Unit *u = userdata;
 804         int r;
 805
 806         assert(bus);
 807         assert(reply);
 808         assert(u);
 809
 810         r = unit_get_cpu_usage(u, &ns);
 811         if (r < 0 && r != -ENODATA)
 812                 log_unit_warning_errno(u, r, "Failed to get cpuacct.usage attribute: %m");
 813
 814         return sd_bus_message_append(reply, "t", ns);
 815 }
 816
 817 static int property_get_cgroup(
 818                 sd_bus *bus,
 819                 const char *path,
 820                 const char *interface,
 821                 const char *property,
 822                 sd_bus_message *reply,
 823                 void *userdata,
 824                 sd_bus_error *error) {
 825
 826         Unit *u = userdata;
 827         const char *t;
 828
 829         assert(bus);
 830         assert(reply);
 831         assert(u);
 832
 833         /* Three cases: a) u->cgroup_path is NULL, in which case the
 834          * unit has no control group, which we report as the empty
 835          * string. b) u->cgroup_path is the empty string, which
 836          * indicates the root cgroup, which we report as "/". c) all
 837          * other cases we report as-is. */
 838
 839         if (u->cgroup_path)
 840                 t = isempty(u->cgroup_path) ? "/" : u->cgroup_path;
 841         else
 842                 t = "";
 843
 844         return sd_bus_message_append(reply, "s", t);
 845 }
 846
 847 static int append_process(sd_bus_message *reply, const char *p, pid_t pid, Set *pids) {
 848         _cleanup_free_ char *buf = NULL, *cmdline = NULL;
 849         int r;
 850
 851         assert(reply);
 852         assert(pid > 0);
 853
 854         r = set_put(pids, PID_TO_PTR(pid));
 855         if (r == -EEXIST || r == 0)
 856                 return 0;
 857         if (r < 0)
 858                 return r;
 859
 860         if (!p) {
 861                 r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &buf);
 862                 if (r == -ESRCH)
 863                         return 0;
 864                 if (r < 0)
 865                         return r;
 866
 867                 p = buf;
 868         }
 869
 870         (void) get_process_cmdline(pid, 0, true, &cmdline);
 871
 872         return sd_bus_message_append(reply,
 873                                      "(sus)",
 874                                      p,
 875                                      (uint32_t) pid,
 876                                      cmdline);
 877 }
 878
 879 static int append_cgroup(sd_bus_message *reply, const char *p, Set *pids) {
 880         _cleanup_closedir_ DIR *d = NULL;
 881         _cleanup_fclose_ FILE *f = NULL;
 882         int r;
 883
 884         assert(reply);
 885         assert(p);
 886
 887         r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, p, &f);
 888         if (r == ENOENT)
 889                 return 0;
 890         if (r < 0)
 891                 return r;
 892
 893         for (;;) {
 894                 pid_t pid;
 895
 896                 r = cg_read_pid(f, &pid);
 897                 if (r < 0)
 898                         return r;
 899                 if (r == 0)
 900                         break;
 901
 902                 if (is_kernel_thread(pid) > 0)
 903                         continue;
 904
 905                 r = append_process(reply, p, pid, pids);
 906                 if (r < 0)
 907                         return r;
 908         }
 909
 910         r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, p, &d);
 911         if (r == -ENOENT)
 912                 return 0;
 913         if (r < 0)
 914                 return r;
 915
 916         for (;;) {
 917                 _cleanup_free_ char *g = NULL, *j = NULL;
 918
 919                 r = cg_read_subgroup(d, &g);
 920                 if (r < 0)
 921                         return r;
 922                 if (r == 0)
 923                         break;
 924
 925                 j = strjoin(p, "/", g, NULL);
 926                 if (!j)
 927                         return -ENOMEM;
 928
 929                 r = append_cgroup(reply, j, pids);
 930                 if (r < 0)
 931                         return r;
 932         }
 933
 934         return 0;
 935 }
 936
 937 int bus_unit_method_get_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 938         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 939         _cleanup_(set_freep) Set *pids = NULL;
 940         Unit *u = userdata;
 941         pid_t pid;
 942         int r;
 943
 944         assert(message);
 945
 946         pids = set_new(NULL);
 947         if (!pids)
 948                 return -ENOMEM;
 949
 950         r = sd_bus_message_new_method_return(message, &reply);
 951         if (r < 0)
 952                 return r;
 953
 954         r = sd_bus_message_open_container(reply, 'a', "(sus)");
 955         if (r < 0)
 956                 return r;
 957
 958         if (u->cgroup_path) {
 959                 r = append_cgroup(reply, u->cgroup_path, pids);
 960                 if (r < 0)
 961                         return r;
 962         }
 963
 964         /* The main and control pids might live outside of the cgroup, hence fetch them separately */
 965         pid = unit_main_pid(u);
 966         if (pid > 0) {
 967                 r = append_process(reply, NULL, pid, pids);
 968                 if (r < 0)
 969                         return r;
 970         }
 971
 972         pid = unit_control_pid(u);
 973         if (pid > 0) {
 974                 r = append_process(reply, NULL, pid, pids);
 975                 if (r < 0)
 976                         return r;
 977         }
 978
 979         r = sd_bus_message_close_container(reply);
 980         if (r < 0)
 981                 return r;
 982
 983         return sd_bus_send(NULL, reply, NULL);
 984 }
 985
 986 const sd_bus_vtable bus_unit_cgroup_vtable[] = {
 987         SD_BUS_VTABLE_START(0),
 988         SD_BUS_PROPERTY("Slice", "s", property_get_slice, 0, 0),
 989         SD_BUS_PROPERTY("ControlGroup", "s", property_get_cgroup, 0, 0),
 990         SD_BUS_PROPERTY("MemoryCurrent", "t", property_get_current_memory, 0, 0),
 991         SD_BUS_PROPERTY("CPUUsageNSec", "t", property_get_cpu_usage, 0, 0),
 992         SD_BUS_PROPERTY("TasksCurrent", "t", property_get_current_tasks, 0, 0),
 993         SD_BUS_METHOD("GetProcesses", NULL, "a(sus)", bus_unit_method_get_processes, SD_BUS_VTABLE_UNPRIVILEGED),
 994         SD_BUS_VTABLE_END
 995 };
 996
 997 static int send_new_signal(sd_bus *bus, void *userdata) {
 998         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
 999         _cleanup_free_ char *p = NULL;
1000         Unit *u = userdata;
1001         int r;
1002
1003         assert(bus);
1004         assert(u);
1005
1006         p = unit_dbus_path(u);
1007         if (!p)
1008                 return -ENOMEM;
1009
1010         r = sd_bus_message_new_signal(
1011                         bus,
1012                         &m,
1013                         "/org/freedesktop/systemd1",
1014                         "org.freedesktop.systemd1.Manager",
1015                         "UnitNew");
1016         if (r < 0)
1017                 return r;
1018
1019         r = sd_bus_message_append(m, "so", u->id, p);
1020         if (r < 0)
1021                 return r;
1022
1023         return sd_bus_send(bus, m, NULL);
1024 }
1025
1026 static int send_changed_signal(sd_bus *bus, void *userdata) {
1027         _cleanup_free_ char *p = NULL;
1028         Unit *u = userdata;
1029         int r;
1030
1031         assert(bus);
1032         assert(u);
1033
1034         p = unit_dbus_path(u);
1035         if (!p)
1036                 return -ENOMEM;
1037
1038         /* Send a properties changed signal. First for the specific
1039          * type, then for the generic unit. The clients may rely on
1040          * this order to get atomic behavior if needed. */
1041
1042         r = sd_bus_emit_properties_changed_strv(
1043                         bus, p,
1044                         unit_dbus_interface_from_type(u->type),
1045                         NULL);
1046         if (r < 0)
1047                 return r;
1048
1049         return sd_bus_emit_properties_changed_strv(
1050                         bus, p,
1051                         "org.freedesktop.systemd1.Unit",
1052                         NULL);
1053 }
1054
1055 void bus_unit_send_change_signal(Unit *u) {
1056         int r;
1057         assert(u);
1058
1059         if (u->in_dbus_queue) {
1060                 LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u);
1061                 u->in_dbus_queue = false;
1062         }
1063
1064         if (!u->id)
1065                 return;
1066
1067         r = bus_foreach_bus(u->manager, NULL, u->sent_dbus_new_signal ? send_changed_signal : send_new_signal, u);
1068         if (r < 0)
1069                 log_unit_debug_errno(u, r, "Failed to send unit change signal for %s: %m", u->id);
1070
1071         u->sent_dbus_new_signal = true;
1072 }
1073
1074 static int send_removed_signal(sd_bus *bus, void *userdata) {
1075         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
1076         _cleanup_free_ char *p = NULL;
1077         Unit *u = userdata;
1078         int r;
1079
1080         assert(bus);
1081         assert(u);
1082
1083         p = unit_dbus_path(u);
1084         if (!p)
1085                 return -ENOMEM;
1086
1087         r = sd_bus_message_new_signal(
1088                         bus,
1089                         &m,
1090                         "/org/freedesktop/systemd1",
1091                         "org.freedesktop.systemd1.Manager",
1092                         "UnitRemoved");
1093         if (r < 0)
1094                 return r;
1095
1096         r = sd_bus_message_append(m, "so", u->id, p);
1097         if (r < 0)
1098                 return r;
1099
1100         return sd_bus_send(bus, m, NULL);
1101 }
1102
1103 void bus_unit_send_removed_signal(Unit *u) {
1104         int r;
1105         assert(u);
1106
1107         if (!u->sent_dbus_new_signal)
1108                 bus_unit_send_change_signal(u);
1109
1110         if (!u->id)
1111                 return;
1112
1113         r = bus_foreach_bus(u->manager, NULL, send_removed_signal, u);
1114         if (r < 0)
1115                 log_unit_debug_errno(u, r, "Failed to send unit remove signal for %s: %m", u->id);
1116 }
1117
1118 int bus_unit_queue_job(
1119                 sd_bus_message *message,
1120                 Unit *u,
1121                 JobType type,
1122                 JobMode mode,
1123                 bool reload_if_possible,
1124                 sd_bus_error *error) {
1125
1126         _cleanup_free_ char *path = NULL;
1127         Job *j;
1128         int r;
1129
1130         assert(message);
1131         assert(u);
1132         assert(type >= 0 && type < _JOB_TYPE_MAX);
1133         assert(mode >= 0 && mode < _JOB_MODE_MAX);
1134
1135         r = mac_selinux_unit_access_check(
1136                         u, message,
1137                         job_type_to_access_method(type),
1138                         error);
1139         if (r < 0)
1140                 return r;
1141
1142         if (reload_if_possible && unit_can_reload(u)) {
1143                 if (type == JOB_RESTART)
1144                         type = JOB_RELOAD_OR_START;
1145                 else if (type == JOB_TRY_RESTART)
1146                         type = JOB_TRY_RELOAD;
1147         }
1148
1149         if (type == JOB_STOP &&
1150             (u->load_state == UNIT_NOT_FOUND || u->load_state == UNIT_ERROR) &&
1151             unit_active_state(u) == UNIT_INACTIVE)
1152                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not loaded.", u->id);
1153
1154         if ((type == JOB_START && u->refuse_manual_start) ||
1155             (type == JOB_STOP && u->refuse_manual_stop) ||
1156             ((type == JOB_RESTART || type == JOB_TRY_RESTART) && (u->refuse_manual_start || u->refuse_manual_stop)) ||
1157             (type == JOB_RELOAD_OR_START && job_type_collapse(type, u) == JOB_START && u->refuse_manual_start))
1158                 return sd_bus_error_setf(error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, unit %s may be requested by dependency only.", u->id);
1159
1160         r = manager_add_job(u->manager, type, u, mode, error, &j);
1161         if (r < 0)
1162                 return r;
1163
1164         if (sd_bus_message_get_bus(message) == u->manager->api_bus) {
1165                 if (!j->clients) {
1166                         r = sd_bus_track_new(sd_bus_message_get_bus(message), &j->clients, NULL, NULL);
1167                         if (r < 0)
1168                                 return r;
1169                 }
1170
1171                 r = sd_bus_track_add_sender(j->clients, message);
1172                 if (r < 0)
1173                         return r;
1174         }
1175
1176         path = job_dbus_path(j);
1177         if (!path)
1178                 return -ENOMEM;
1179
1180         return sd_bus_reply_method_return(message, "o", path);
1181 }
1182
1183 static int bus_unit_set_transient_property(
1184                 Unit *u,
1185                 const char *name,
1186                 sd_bus_message *message,
1187                 UnitSetPropertiesMode mode,
1188                 sd_bus_error *error) {
1189
1190         int r;
1191
1192         assert(u);
1193         assert(name);
1194         assert(message);
1195
1196         if (streq(name, "Description")) {
1197                 const char *d;
1198
1199                 r = sd_bus_message_read(message, "s", &d);
1200                 if (r < 0)
1201                         return r;
1202
1203                 if (mode != UNIT_CHECK) {
1204                         r = unit_set_description(u, d);
1205                         if (r < 0)
1206                                 return r;
1207
1208                         unit_write_drop_in_format(u, mode, name, "[Unit]\nDescription=%s\n", d);
1209                 }
1210
1211                 return 1;
1212
1213         } else if (streq(name, "DefaultDependencies")) {
1214                 int b;
1215
1216                 r = sd_bus_message_read(message, "b", &b);
1217                 if (r < 0)
1218                         return r;
1219
1220                 if (mode != UNIT_CHECK) {
1221                         u->default_dependencies = b;
1222                         unit_write_drop_in_format(u, mode, name, "[Unit]\nDefaultDependencies=%s\n", yes_no(b));
1223                 }
1224
1225                 return 1;
1226
1227         } else if (streq(name, "Slice")) {
1228                 Unit *slice;
1229                 const char *s;
1230
1231                 if (!UNIT_HAS_CGROUP_CONTEXT(u))
1232                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "The slice property is only available for units with control groups.");
1233                 if (u->type == UNIT_SLICE)
1234                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Slice may not be set for slice units.");
1235                 if (unit_has_name(u, SPECIAL_INIT_SCOPE))
1236                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot set slice for init.scope");
1237
1238                 r = sd_bus_message_read(message, "s", &s);
1239                 if (r < 0)
1240                         return r;
1241
1242                 if (!unit_name_is_valid(s, UNIT_NAME_PLAIN))
1243                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name '%s'", s);
1244
1245                 /* Note that we do not dispatch the load queue here yet, as we don't want our own transient unit to be
1246                  * loaded while we are still setting it up. Or in other words, we use manager_load_unit_prepare()
1247                  * instead of manager_load_unit() on purpose, here. */
1248                 r = manager_load_unit_prepare(u->manager, s, NULL, error, &slice);
1249                 if (r < 0)
1250                         return r;
1251
1252                 if (slice->type != UNIT_SLICE)
1253                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unit name '%s' is not a slice", s);
1254
1255                 if (mode != UNIT_CHECK) {
1256                         r = unit_set_slice(u, slice);
1257                         if (r < 0)
1258                                 return r;
1259
1260                         unit_write_drop_in_private_format(u, mode, name, "Slice=%s\n", s);
1261                 }
1262
1263                 return 1;
1264
1265         } else if (STR_IN_SET(name,
1266                               "Requires", "RequiresOverridable",
1267                               "Requisite", "RequisiteOverridable",
1268                               "Wants",
1269                               "BindsTo",
1270                               "Conflicts",
1271                               "Before", "After",
1272                               "OnFailure",
1273                               "PropagatesReloadTo", "ReloadPropagatedFrom",
1274                               "PartOf")) {
1275
1276                 UnitDependency d;
1277                 const char *other;
1278
1279                 if (streq(name, "RequiresOverridable"))
1280                         d = UNIT_REQUIRES; /* redirect for obsolete unit dependency type */
1281                 else if (streq(name, "RequisiteOverridable"))
1282                         d = UNIT_REQUISITE; /* same here */
1283                 else {
1284                         d = unit_dependency_from_string(name);
1285                         if (d < 0)
1286                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit dependency: %s", name);
1287                 }
1288
1289                 r = sd_bus_message_enter_container(message, 'a', "s");
1290                 if (r < 0)
1291                         return r;
1292
1293                 while ((r = sd_bus_message_read(message, "s", &other)) > 0) {
1294                         if (!unit_name_is_valid(other, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))
1295                                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name %s", other);
1296
1297                         if (mode != UNIT_CHECK) {
1298                                 _cleanup_free_ char *label = NULL;
1299
1300                                 r = unit_add_dependency_by_name(u, d, other, NULL, true);
1301                                 if (r < 0)
1302                                         return r;
1303
1304                                 label = strjoin(name, "-", other, NULL);
1305                                 if (!label)
1306                                         return -ENOMEM;
1307
1308                                 unit_write_drop_in_format(u, mode, label, "[Unit]\n%s=%s\n", name, other);
1309                         }
1310
1311                 }
1312                 if (r < 0)
1313                         return r;
1314
1315                 r = sd_bus_message_exit_container(message);
1316                 if (r < 0)
1317                         return r;
1318
1319                 return 1;
1320         }
1321
1322         return 0;
1323 }
1324
1325 int bus_unit_set_properties(
1326                 Unit *u,
1327                 sd_bus_message *message,
1328                 UnitSetPropertiesMode mode,
1329                 bool commit,
1330                 sd_bus_error *error) {
1331
1332         bool for_real = false;
1333         unsigned n = 0;
1334         int r;
1335
1336         assert(u);
1337         assert(message);
1338
1339         /* We iterate through the array twice. First run we just check
1340          * if all passed data is valid, second run actually applies
1341          * it. This is to implement transaction-like behaviour without
1342          * actually providing full transactions. */
1343
1344         r = sd_bus_message_enter_container(message, 'a', "(sv)");
1345         if (r < 0)
1346                 return r;
1347
1348         for (;;) {
1349                 const char *name;
1350
1351                 r = sd_bus_message_enter_container(message, 'r', "sv");
1352                 if (r < 0)
1353                         return r;
1354                 if (r == 0) {
1355                         if (for_real || mode == UNIT_CHECK)
1356                                 break;
1357
1358                         /* Reached EOF. Let's try again, and this time for realz... */
1359                         r = sd_bus_message_rewind(message, false);
1360                         if (r < 0)
1361                                 return r;
1362
1363                         for_real = true;
1364                         continue;
1365                 }
1366
1367                 r = sd_bus_message_read(message, "s", &name);
1368                 if (r < 0)
1369                         return r;
1370
1371                 if (!UNIT_VTABLE(u)->bus_set_property)
1372                         return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Objects of this type do not support setting properties.");
1373
1374                 r = sd_bus_message_enter_container(message, 'v', NULL);
1375                 if (r < 0)
1376                         return r;
1377
1378                 r = UNIT_VTABLE(u)->bus_set_property(u, name, message, for_real ? mode : UNIT_CHECK, error);
1379                 if (r == 0 && u->transient && u->load_state == UNIT_STUB)
1380                         r = bus_unit_set_transient_property(u, name, message, for_real ? mode : UNIT_CHECK, error);
1381                 if (r < 0)
1382                         return r;
1383                 if (r == 0)
1384                         return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Cannot set property %s, or unknown property.", name);
1385
1386                 r = sd_bus_message_exit_container(message);
1387                 if (r < 0)
1388                         return r;
1389
1390                 r = sd_bus_message_exit_container(message);
1391                 if (r < 0)
1392                         return r;
1393
1394                 n += for_real;
1395         }
1396
1397         r = sd_bus_message_exit_container(message);
1398         if (r < 0)
1399                 return r;
1400
1401         if (commit && n > 0 && UNIT_VTABLE(u)->bus_commit_properties)
1402                 UNIT_VTABLE(u)->bus_commit_properties(u);
1403
1404         return n;
1405 }
1406
1407 int bus_unit_check_load_state(Unit *u, sd_bus_error *error) {
1408         assert(u);
1409
1410         if (u->load_state == UNIT_LOADED)
1411                 return 0;
1412
1413         /* Give a better description of the unit error when
1414          * possible. Note that in the case of UNIT_MASKED, load_error
1415          * is not set. */
1416         if (u->load_state == UNIT_MASKED)
1417                 return sd_bus_error_setf(error, BUS_ERROR_UNIT_MASKED, "Unit %s is masked.", u->id);
1418
1419         if (u->load_state == UNIT_NOT_FOUND)
1420                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not found.", u->id);
1421
1422         return sd_bus_error_set_errnof(error, u->load_error, "Unit %s is not loaded properly: %m.", u->id);
1423 }