service.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35
  36 #define COMMENTS "#;\n"
  37 #define NEWLINES "\n\r"
  38 #define LINE_MAX 4096
  39
  40 static const char * const rcnd_table[] = {
  41         "/rc0.d",  SPECIAL_RUNLEVEL0_TARGET,
  42         "/rc1.d",  SPECIAL_RUNLEVEL1_TARGET,
  43         "/rc2.d",  SPECIAL_RUNLEVEL2_TARGET,
  44         "/rc3.d",  SPECIAL_RUNLEVEL3_TARGET,
  45         "/rc4.d",  SPECIAL_RUNLEVEL4_TARGET,
  46         "/rc5.d",  SPECIAL_RUNLEVEL5_TARGET,
  47         "/rc6.d",  SPECIAL_RUNLEVEL6_TARGET,
  48         "/boot.d", SPECIAL_BASIC_TARGET
  49 };
  50
  51 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  52         [SERVICE_DEAD] = UNIT_INACTIVE,
  53         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  54         [SERVICE_START] = UNIT_ACTIVATING,
  55         [SERVICE_START_POST] = UNIT_ACTIVATING,
  56         [SERVICE_RUNNING] = UNIT_ACTIVE,
  57         [SERVICE_EXITED] = UNIT_ACTIVE,
  58         [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
  59         [SERVICE_STOP] = UNIT_DEACTIVATING,
  60         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  61         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  62         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  63         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  64         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  65         [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
  66         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
  67 };
  68
  69 static void service_init(Unit *u) {
  70         Service *s = SERVICE(u);
  71
  72         assert(u);
  73         assert(u->meta.load_state == UNIT_STUB);
  74
  75         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  76         s->restart_usec = DEFAULT_RESTART_USEC;
  77         s->timer_watch.type = WATCH_INVALID;
  78         s->sysv_start_priority = -1;
  79         s->socket_fd = -1;
  80
  81         exec_context_init(&s->exec_context);
  82
  83         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
  84
  85         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
  86 }
  87
  88 static void service_unwatch_control_pid(Service *s) {
  89         assert(s);
  90
  91         if (s->control_pid <= 0)
  92                 return;
  93
  94         unit_unwatch_pid(UNIT(s), s->control_pid);
  95         s->control_pid = 0;
  96 }
  97
  98 static void service_unwatch_main_pid(Service *s) {
  99         assert(s);
 100
 101         if (s->main_pid <= 0)
 102                 return;
 103
 104         unit_unwatch_pid(UNIT(s), s->main_pid);
 105         s->main_pid = 0;
 106 }
 107
 108 static void service_close_socket_fd(Service *s) {
 109         assert(s);
 110
 111         if (s->socket_fd < 0)
 112                 return;
 113
 114         close_nointr_nofail(s->socket_fd);
 115         s->socket_fd = -1;
 116 }
 117
 118 static void service_done(Unit *u) {
 119         Service *s = SERVICE(u);
 120
 121         assert(s);
 122
 123         free(s->pid_file);
 124         s->pid_file = NULL;
 125
 126         free(s->sysv_path);
 127         s->sysv_path = NULL;
 128
 129         free(s->sysv_runlevels);
 130         s->sysv_runlevels = NULL;
 131
 132         exec_context_done(&s->exec_context);
 133         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 134         s->control_command = NULL;
 135
 136         /* This will leak a process, but at least no memory or any of
 137          * our resources */
 138         service_unwatch_main_pid(s);
 139         service_unwatch_control_pid(s);
 140
 141         if (s->bus_name)  {
 142                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 143                 free(s->bus_name);
 144                 s->bus_name = NULL;
 145         }
 146
 147         service_close_socket_fd(s);
 148
 149         unit_unwatch_timer(u, &s->timer_watch);
 150 }
 151
 152 static int sysv_translate_name(const char *name, char **_r) {
 153
 154         static const char * const table[] = {
 155                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 156                 "$network",   SPECIAL_NETWORK_TARGET,
 157                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 158                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 159                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 160                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 161                 "$time",      SPECIAL_RTC_SET_TARGET
 162         };
 163
 164         unsigned i;
 165         char *r;
 166
 167         for (i = 0; i < ELEMENTSOF(table); i += 2)
 168                 if (streq(table[i], name)) {
 169                         if (!(r = strdup(table[i+1])))
 170                                 return -ENOMEM;
 171
 172                         goto finish;
 173                 }
 174
 175         if (*name == '$')
 176                 return 0;
 177
 178         if (asprintf(&r, "%s.service", name) < 0)
 179                 return -ENOMEM;
 180
 181 finish:
 182
 183         if (_r)
 184                 *_r = r;
 185
 186         return 1;
 187 }
 188
 189 static int sysv_chkconfig_order(Service *s) {
 190         Meta *other;
 191         int r;
 192
 193         assert(s);
 194
 195         if (s->sysv_start_priority < 0)
 196                 return 0;
 197
 198         /* For each pair of services where at least one lacks a LSB
 199          * header, we use the start priority value to order things. */
 200
 201         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 202                 Service *t;
 203                 UnitDependency d;
 204
 205                 t = (Service*) other;
 206
 207                 if (s == t)
 208                         continue;
 209
 210                 if (t->sysv_start_priority < 0)
 211                         continue;
 212
 213                 /* If both units have modern headers we don't care
 214                  * about the priorities */
 215                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 216                     (!t->sysv_path || t->sysv_has_lsb))
 217                         continue;
 218
 219                 if (t->sysv_start_priority < s->sysv_start_priority)
 220                         d = UNIT_AFTER;
 221                 else if (t->sysv_start_priority > s->sysv_start_priority)
 222                         d = UNIT_BEFORE;
 223                 else
 224                         continue;
 225
 226                 /* FIXME: Maybe we should compare the name here lexicographically? */
 227
 228                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 229                         return r;
 230         }
 231
 232         return 0;
 233 }
 234
 235 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 236         ExecCommand *c;
 237
 238         if (!(c = new0(ExecCommand, 1)))
 239                 return NULL;
 240
 241         if (!(c->path = strdup(path))) {
 242                 free(c);
 243                 return NULL;
 244         }
 245
 246         if (!(c->argv = strv_new(path, arg1, NULL))) {
 247                 free(c->path);
 248                 free(c);
 249                 return NULL;
 250         }
 251
 252         return c;
 253 }
 254
 255 static int sysv_exec_commands(Service *s) {
 256         ExecCommand *c;
 257
 258         assert(s);
 259         assert(s->sysv_path);
 260
 261         if (!(c = exec_command_new(s->sysv_path, "start")))
 262                 return -ENOMEM;
 263         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 264
 265         if (!(c = exec_command_new(s->sysv_path, "stop")))
 266                 return -ENOMEM;
 267         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 268
 269         if (!(c = exec_command_new(s->sysv_path, "reload")))
 270                 return -ENOMEM;
 271         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 272
 273         return 0;
 274 }
 275
 276 static int service_load_sysv_path(Service *s, const char *path) {
 277         FILE *f;
 278         Unit *u;
 279         unsigned line = 0;
 280         int r;
 281         bool normal_service;
 282         enum {
 283                 NORMAL,
 284                 DESCRIPTION,
 285                 LSB,
 286                 LSB_DESCRIPTION
 287         } state = NORMAL;
 288
 289         assert(s);
 290         assert(path);
 291
 292         u = UNIT(s);
 293
 294         if (!(f = fopen(path, "re"))) {
 295                 r = errno == ENOENT ? 0 : -errno;
 296                 goto finish;
 297         }
 298
 299         s->type = SERVICE_FORKING;
 300         s->restart = SERVICE_ONCE;
 301
 302         free(s->sysv_path);
 303         if (!(s->sysv_path = strdup(path))) {
 304                 r = -ENOMEM;
 305                 goto finish;
 306         }
 307
 308         while (!feof(f)) {
 309                 char l[LINE_MAX], *t;
 310
 311                 if (!fgets(l, sizeof(l), f)) {
 312                         if (feof(f))
 313                                 break;
 314
 315                         r = -errno;
 316                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 317                         goto finish;
 318                 }
 319
 320                 line++;
 321
 322                 t = strstrip(l);
 323                 if (*t != '#')
 324                         continue;
 325
 326                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 327                         state = LSB;
 328                         s->sysv_has_lsb = true;
 329                         continue;
 330                 }
 331
 332                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 333                         state = NORMAL;
 334                         continue;
 335                 }
 336
 337                 t++;
 338                 t += strspn(t, WHITESPACE);
 339
 340                 if (state == NORMAL) {
 341
 342                         /* Try to parse Red Hat style chkconfig headers */
 343
 344                         if (startswith(t, "chkconfig:")) {
 345                                 int start_priority;
 346                                 char runlevels[16], *k;
 347
 348                                 state = NORMAL;
 349
 350                                 if (sscanf(t+10, "%15s %i %*i",
 351                                            runlevels,
 352                                            &start_priority) != 2) {
 353
 354                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 355                                         continue;
 356                                 }
 357
 358                                 if (start_priority < 0 || start_priority > 99)
 359                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 360                                 else if (s->sysv_start_priority < 0)
 361                                         s->sysv_start_priority = start_priority;
 362
 363                                 char_array_0(runlevels);
 364                                 k = delete_chars(runlevels, WHITESPACE "-");
 365
 366                                 if (k[0]) {
 367                                         char *d;
 368
 369                                         if (!(d = strdup(k))) {
 370                                                 r = -ENOMEM;
 371                                                 goto finish;
 372                                         }
 373
 374                                         free(s->sysv_runlevels);
 375                                         s->sysv_runlevels = d;
 376                                 }
 377
 378                         } else if (startswith(t, "description:")) {
 379
 380                                 size_t k = strlen(t);
 381                                 char *d;
 382
 383                                 if (t[k-1] == '\\') {
 384                                         state = DESCRIPTION;
 385                                         t[k-1] = 0;
 386                                 }
 387
 388                                 if (!(d = strdup(strstrip(t+12)))) {
 389                                         r = -ENOMEM;
 390                                         goto finish;
 391                                 }
 392
 393                                 free(u->meta.description);
 394                                 u->meta.description = d;
 395
 396                         } else if (startswith(t, "pidfile:")) {
 397
 398                                 char *fn;
 399
 400                                 state = NORMAL;
 401
 402                                 fn = strstrip(t+8);
 403                                 if (!path_is_absolute(fn)) {
 404                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 405                                         continue;
 406                                 }
 407
 408                                 if (!(fn = strdup(fn))) {
 409                                         r = -ENOMEM;
 410                                         goto finish;
 411                                 }
 412
 413                                 free(s->pid_file);
 414                                 s->pid_file = fn;
 415                         }
 416
 417                 } else if (state == DESCRIPTION) {
 418
 419                         /* Try to parse Red Hat style description
 420                          * continuation */
 421
 422                         size_t k = strlen(t);
 423                         char *d;
 424
 425                         if (t[k-1] == '\\')
 426                                 t[k-1] = 0;
 427                         else
 428                                 state = NORMAL;
 429
 430                         assert(u->meta.description);
 431                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 432                                 r = -ENOMEM;
 433                                 goto finish;
 434                         }
 435
 436                         free(u->meta.description);
 437                         u->meta.description = d;
 438
 439                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 440
 441                         if (startswith(t, "Provides:")) {
 442                                 char *i, *w;
 443                                 size_t z;
 444
 445                                 state = LSB;
 446
 447                                 FOREACH_WORD(w, z, t+9, i) {
 448                                         char *n, *m;
 449
 450                                         if (!(n = strndup(w, z))) {
 451                                                 r = -ENOMEM;
 452                                                 goto finish;
 453                                         }
 454
 455                                         r = sysv_translate_name(n, &m);
 456                                         free(n);
 457
 458                                         if (r < 0)
 459                                                 goto finish;
 460
 461                                         if (r == 0)
 462                                                 continue;
 463
 464                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 465                                                 r = unit_add_name(u, m);
 466                                         else {
 467                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m, NULL, true)) >= 0)
 468                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 469                                         }
 470
 471                                         free(m);
 472
 473                                         if (r < 0)
 474                                                 goto finish;
 475                                 }
 476
 477                         } else if (startswith(t, "Required-Start:") ||
 478                                    startswith(t, "Should-Start:")) {
 479                                 char *i, *w;
 480                                 size_t z;
 481
 482                                 state = LSB;
 483
 484                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 485                                         char *n, *m;
 486
 487                                         if (!(n = strndup(w, z))) {
 488                                                 r = -ENOMEM;
 489                                                 goto finish;
 490                                         }
 491
 492                                         r = sysv_translate_name(n, &m);
 493                                         free(n);
 494
 495                                         if (r < 0)
 496                                                 goto finish;
 497
 498                                         if (r == 0)
 499                                                 continue;
 500
 501                                         r = unit_add_dependency_by_name(u, UNIT_AFTER, m, NULL, true);
 502                                         free(m);
 503
 504                                         if (r < 0)
 505                                                 goto finish;
 506                                 }
 507                         } else if (startswith(t, "Default-Start:")) {
 508                                 char *k, *d;
 509
 510                                 state = LSB;
 511
 512                                 k = delete_chars(t+14, WHITESPACE "-");
 513
 514                                 if (k[0] != 0) {
 515                                         if (!(d = strdup(k))) {
 516                                                 r = -ENOMEM;
 517                                                 goto finish;
 518                                         }
 519
 520                                         free(s->sysv_runlevels);
 521                                         s->sysv_runlevels = d;
 522                                 }
 523
 524                         } else if (startswith(t, "Description:")) {
 525                                 char *d;
 526
 527                                 state = LSB_DESCRIPTION;
 528
 529                                 if (!(d = strdup(strstrip(t+12)))) {
 530                                         r = -ENOMEM;
 531                                         goto finish;
 532                                 }
 533
 534                                 free(u->meta.description);
 535                                 u->meta.description = d;
 536
 537                         } else if (startswith(t, "Short-Description:") &&
 538                                    !u->meta.description) {
 539                                 char *d;
 540
 541                                 /* We use the short description only
 542                                  * if no long description is set. */
 543
 544                                 state = LSB;
 545
 546                                 if (!(d = strdup(strstrip(t+18)))) {
 547                                         r = -ENOMEM;
 548                                         goto finish;
 549                                 }
 550
 551                                 u->meta.description = d;
 552
 553                         } else if (state == LSB_DESCRIPTION) {
 554
 555                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 556                                         char *d;
 557
 558                                         assert(u->meta.description);
 559                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 560                                                 r = -ENOMEM;
 561                                                 goto finish;
 562                                         }
 563
 564                                         free(u->meta.description);
 565                                         u->meta.description = d;
 566                                 } else
 567                                         state = LSB;
 568                         }
 569                 }
 570         }
 571
 572         /* If init scripts have no LSB header, then we enforce the
 573          * ordering via the chkconfig priorities. We try to determine
 574          * a priority for *all* init scripts here, since they are
 575          * needed as soon as at least one non-LSB script is used. */
 576
 577         if (s->sysv_start_priority < 0)
 578                 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", u->meta.id);
 579
 580         if ((r = sysv_exec_commands(s)) < 0)
 581                 goto finish;
 582
 583         normal_service = !s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels);
 584
 585         if (normal_service) {
 586                 /* If there a runlevels configured for this service
 587                  * but none of the standard ones, then we assume this
 588                  * is some special kind of service (which might be
 589                  * needed for early boot) and don't create any links
 590                  * to it. */
 591
 592                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0 ||
 593                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 594                         goto finish;
 595         }
 596
 597         /* Special setting for all SysV services */
 598         s->valid_no_process = true;
 599         s->kill_mode = KILL_PROCESS_GROUP;
 600
 601         /* Don't timeout special services during boot (like fsck) */
 602         if (s->sysv_runlevels && !normal_service)
 603                 s->timeout_usec = 0;
 604
 605         u->meta.load_state = UNIT_LOADED;
 606         r = 0;
 607
 608 finish:
 609
 610         if (f)
 611                 fclose(f);
 612
 613         return r;
 614 }
 615
 616 static int service_load_sysv_name(Service *s, const char *name) {
 617         char **p;
 618
 619         assert(s);
 620         assert(name);
 621
 622         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 623                 char *path;
 624                 int r;
 625
 626                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 627                         return -ENOMEM;
 628
 629                 assert(endswith(path, ".service"));
 630                 path[strlen(path)-8] = 0;
 631
 632                 r = service_load_sysv_path(s, path);
 633                 free(path);
 634
 635                 if (r < 0)
 636                         return r;
 637
 638                 if ((UNIT(s)->meta.load_state != UNIT_STUB))
 639                         break;
 640         }
 641
 642         return 0;
 643 }
 644
 645 static int service_load_sysv(Service *s) {
 646         const char *t;
 647         Iterator i;
 648         int r;
 649
 650         assert(s);
 651
 652         /* Load service data from SysV init scripts, preferably with
 653          * LSB headers ... */
 654
 655         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 656                 return 0;
 657
 658         if ((t = UNIT(s)->meta.id))
 659                 if ((r = service_load_sysv_name(s, t)) < 0)
 660                         return r;
 661
 662         if (UNIT(s)->meta.load_state == UNIT_STUB)
 663                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 664                         if (t == UNIT(s)->meta.id)
 665                                 continue;
 666
 667                         if ((r == service_load_sysv_name(s, t)) < 0)
 668                                 return r;
 669
 670                         if (UNIT(s)->meta.load_state != UNIT_STUB)
 671                                 break;
 672                 }
 673
 674         return 0;
 675 }
 676
 677 static int service_add_bus_name(Service *s) {
 678         char *n;
 679         int r;
 680
 681         assert(s);
 682         assert(s->bus_name);
 683
 684         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 685                 return 0;
 686
 687         r = unit_merge_by_name(UNIT(s), n);
 688         free(n);
 689
 690         return r;
 691 }
 692
 693 static int service_verify(Service *s) {
 694         assert(s);
 695
 696         if (UNIT(s)->meta.load_state != UNIT_LOADED)
 697                 return 0;
 698
 699         if (!s->exec_command[SERVICE_EXEC_START]) {
 700                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->meta.id);
 701                 return -EINVAL;
 702         }
 703
 704         if (s->type == SERVICE_DBUS && !s->bus_name) {
 705                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->meta.id);
 706                 return -EINVAL;
 707         }
 708
 709         return 0;
 710 }
 711
 712 static int service_load(Unit *u) {
 713         int r;
 714         Service *s = SERVICE(u);
 715
 716         assert(s);
 717
 718         /* Load a .service file */
 719         if ((r = unit_load_fragment(u)) < 0)
 720                 return r;
 721
 722         /* Load a classic init script as a fallback, if we couldn't find anything */
 723         if (u->meta.load_state == UNIT_STUB)
 724                 if ((r = service_load_sysv(s)) < 0)
 725                         return r;
 726
 727         /* Still nothing found? Then let's give up */
 728         if (u->meta.load_state == UNIT_STUB)
 729                 return -ENOENT;
 730
 731         /* We were able to load something, then let's add in the
 732          * dropin directories. */
 733         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 734                 return r;
 735
 736         /* This is a new unit? Then let's add in some extras */
 737         if (u->meta.load_state == UNIT_LOADED) {
 738                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 739                         return r;
 740
 741                 if ((r = unit_add_default_cgroup(u)) < 0)
 742                         return r;
 743
 744                 if ((r = sysv_chkconfig_order(s)) < 0)
 745                         return r;
 746
 747                 if (s->bus_name) {
 748                         if ((r = service_add_bus_name(s)) < 0)
 749                                 return r;
 750
 751                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 752                             return r;
 753                 }
 754         }
 755
 756         return service_verify(s);
 757 }
 758
 759 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 760
 761         ServiceExecCommand c;
 762         Service *s = SERVICE(u);
 763         const char *prefix2;
 764         char *p2;
 765
 766         assert(s);
 767
 768         p2 = strappend(prefix, "\t");
 769         prefix2 = p2 ? p2 : prefix;
 770
 771         fprintf(f,
 772                 "%sService State: %s\n"
 773                 "%sPermissionsStartOnly: %s\n"
 774                 "%sRootDirectoryStartOnly: %s\n"
 775                 "%sValidNoProcess: %s\n"
 776                 "%sKillMode: %s\n"
 777                 "%sType: %s\n",
 778                 prefix, service_state_to_string(s->state),
 779                 prefix, yes_no(s->permissions_start_only),
 780                 prefix, yes_no(s->root_directory_start_only),
 781                 prefix, yes_no(s->valid_no_process),
 782                 prefix, kill_mode_to_string(s->kill_mode),
 783                 prefix, service_type_to_string(s->type));
 784
 785         if (s->control_pid > 0)
 786                 fprintf(f,
 787                         "%sControl PID: %llu\n",
 788                         prefix, (unsigned long long) s->control_pid);
 789
 790         if (s->main_pid > 0)
 791                 fprintf(f,
 792                         "%sMain PID: %llu\n",
 793                         prefix, (unsigned long long) s->main_pid);
 794
 795         if (s->pid_file)
 796                 fprintf(f,
 797                         "%sPIDFile: %s\n",
 798                         prefix, s->pid_file);
 799
 800         if (s->bus_name)
 801                 fprintf(f,
 802                         "%sBusName: %s\n"
 803                         "%sBus Name Good: %s\n",
 804                         prefix, s->bus_name,
 805                         prefix, yes_no(s->bus_name_good));
 806
 807         exec_context_dump(&s->exec_context, f, prefix);
 808
 809         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 810
 811                 if (!s->exec_command[c])
 812                         continue;
 813
 814                 fprintf(f, "%s-> %s:\n",
 815                         prefix, service_exec_command_to_string(c));
 816
 817                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 818         }
 819
 820         if (s->sysv_path)
 821                 fprintf(f,
 822                         "%sSysV Init Script Path: %s\n"
 823                         "%sSysV Init Script has LSB Header: %s\n",
 824                         prefix, s->sysv_path,
 825                         prefix, yes_no(s->sysv_has_lsb));
 826
 827         if (s->sysv_start_priority >= 0)
 828                 fprintf(f,
 829                         "%sSysVStartPriority: %i\n",
 830                         prefix, s->sysv_start_priority);
 831
 832         if (s->sysv_runlevels)
 833                 fprintf(f, "%sSysVRunLevels: %s\n",
 834                         prefix, s->sysv_runlevels);
 835
 836         free(p2);
 837 }
 838
 839 static int service_load_pid_file(Service *s) {
 840         char *k;
 841         unsigned long p;
 842         int r;
 843
 844         assert(s);
 845
 846         if (s->main_pid_known)
 847                 return 0;
 848
 849         assert(s->main_pid <= 0);
 850
 851         if (!s->pid_file)
 852                 return -ENOENT;
 853
 854         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 855                 return r;
 856
 857         if ((r = safe_atolu(k, &p)) < 0) {
 858                 free(k);
 859                 return r;
 860         }
 861
 862         if ((unsigned long) (pid_t) p != p)
 863                 return -ERANGE;
 864
 865         if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
 866                 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
 867                             (unsigned long long) p, s->pid_file);
 868                 return -ESRCH;
 869         }
 870
 871         if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
 872                 /* FIXME: we need to do something here */
 873                 return r;
 874
 875         s->main_pid = (pid_t) p;
 876         s->main_pid_known = true;
 877
 878         return 0;
 879 }
 880
 881 static int service_get_sockets(Service *s, Set **_set) {
 882         Set *set;
 883         Iterator i;
 884         char *t;
 885         int r;
 886
 887         assert(s);
 888         assert(_set);
 889
 890         /* Collects all Socket objects that belong to this
 891          * service. Note that a service might have multiple sockets
 892          * via multiple names. */
 893
 894         if (!(set = set_new(NULL, NULL)))
 895                 return -ENOMEM;
 896
 897         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 898                 char *k;
 899                 Unit *p;
 900
 901                 /* Look for all socket objects that go by any of our
 902                  * units and collect their fds */
 903
 904                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 905                         r = -ENOMEM;
 906                         goto fail;
 907                 }
 908
 909                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 910                 free(k);
 911
 912                 if (!p)
 913                         continue;
 914
 915                 if ((r = set_put(set, p)) < 0)
 916                         goto fail;
 917         }
 918
 919         *_set = set;
 920         return 0;
 921
 922 fail:
 923         set_free(set);
 924         return r;
 925 }
 926
 927 static int service_notify_sockets_dead(Service *s) {
 928         Iterator i;
 929         Set *set;
 930         Socket *sock;
 931         int r;
 932
 933         assert(s);
 934
 935         /* Notifies all our sockets when we die */
 936         if ((r = service_get_sockets(s, &set)) < 0)
 937                 return r;
 938
 939         SET_FOREACH(sock, set, i)
 940                 socket_notify_service_dead(sock);
 941
 942         set_free(set);
 943
 944         return 0;
 945 }
 946
 947 static void service_set_state(Service *s, ServiceState state) {
 948         ServiceState old_state;
 949         assert(s);
 950
 951         old_state = s->state;
 952         s->state = state;
 953
 954         if (state != SERVICE_START_PRE &&
 955             state != SERVICE_START &&
 956             state != SERVICE_START_POST &&
 957             state != SERVICE_RELOAD &&
 958             state != SERVICE_STOP &&
 959             state != SERVICE_STOP_SIGTERM &&
 960             state != SERVICE_STOP_SIGKILL &&
 961             state != SERVICE_STOP_POST &&
 962             state != SERVICE_FINAL_SIGTERM &&
 963             state != SERVICE_FINAL_SIGKILL &&
 964             state != SERVICE_AUTO_RESTART)
 965                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 966
 967         if (state != SERVICE_START &&
 968             state != SERVICE_START_POST &&
 969             state != SERVICE_RUNNING &&
 970             state != SERVICE_RELOAD &&
 971             state != SERVICE_STOP &&
 972             state != SERVICE_STOP_SIGTERM &&
 973             state != SERVICE_STOP_SIGKILL)
 974                 service_unwatch_main_pid(s);
 975
 976         if (state != SERVICE_START_PRE &&
 977             state != SERVICE_START &&
 978             state != SERVICE_START_POST &&
 979             state != SERVICE_RELOAD &&
 980             state != SERVICE_STOP &&
 981             state != SERVICE_STOP_SIGTERM &&
 982             state != SERVICE_STOP_SIGKILL &&
 983             state != SERVICE_STOP_POST &&
 984             state != SERVICE_FINAL_SIGTERM &&
 985             state != SERVICE_FINAL_SIGKILL) {
 986                 service_unwatch_control_pid(s);
 987                 s->control_command = NULL;
 988                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 989         }
 990
 991         if (state == SERVICE_DEAD ||
 992             state == SERVICE_STOP ||
 993             state == SERVICE_STOP_SIGTERM ||
 994             state == SERVICE_STOP_SIGKILL ||
 995             state == SERVICE_STOP_POST ||
 996             state == SERVICE_FINAL_SIGTERM ||
 997             state == SERVICE_FINAL_SIGKILL ||
 998             state == SERVICE_MAINTAINANCE ||
 999             state == SERVICE_AUTO_RESTART)
1000                 service_notify_sockets_dead(s);
1001
1002         if (state != SERVICE_START_PRE &&
1003             state != SERVICE_START &&
1004             !(state == SERVICE_DEAD && UNIT(s)->meta.job))
1005                 service_close_socket_fd(s);
1006
1007         if (old_state != state)
1008                 log_debug("%s changed %s -> %s", UNIT(s)->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1009
1010         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1011 }
1012
1013 static int service_coldplug(Unit *u) {
1014         Service *s = SERVICE(u);
1015         int r;
1016
1017         assert(s);
1018         assert(s->state == SERVICE_DEAD);
1019
1020         if (s->deserialized_state != s->state) {
1021
1022                 if (s->deserialized_state == SERVICE_START_PRE ||
1023                     s->deserialized_state == SERVICE_START ||
1024                     s->deserialized_state == SERVICE_START_POST ||
1025                     s->deserialized_state == SERVICE_RELOAD ||
1026                     s->deserialized_state == SERVICE_STOP ||
1027                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1028                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1029                     s->deserialized_state == SERVICE_STOP_POST ||
1030                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1031                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1032                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1033
1034                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1035                                 usec_t k;
1036
1037                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1038
1039                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1040                                         return r;
1041                         }
1042                 }
1043
1044                 if ((s->deserialized_state == SERVICE_START &&
1045                      (s->type == SERVICE_FORKING ||
1046                       s->type == SERVICE_DBUS)) ||
1047                     s->deserialized_state == SERVICE_START_POST ||
1048                     s->deserialized_state == SERVICE_RUNNING ||
1049                     s->deserialized_state == SERVICE_RELOAD ||
1050                     s->deserialized_state == SERVICE_STOP ||
1051                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1052                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1053                         if (s->main_pid > 0)
1054                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1055                                         return r;
1056
1057                 if (s->deserialized_state == SERVICE_START_PRE ||
1058                     s->deserialized_state == SERVICE_START ||
1059                     s->deserialized_state == SERVICE_START_POST ||
1060                     s->deserialized_state == SERVICE_RELOAD ||
1061                     s->deserialized_state == SERVICE_STOP ||
1062                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1063                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1064                     s->deserialized_state == SERVICE_STOP_POST ||
1065                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1066                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1067                         if (s->control_pid > 0)
1068                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1069                                         return r;
1070
1071                 service_set_state(s, s->deserialized_state);
1072         }
1073
1074         return 0;
1075 }
1076
1077 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1078         Iterator i;
1079         int r;
1080         int *rfds = NULL;
1081         unsigned rn_fds = 0;
1082         Set *set;
1083         Socket *sock;
1084
1085         assert(s);
1086         assert(fds);
1087         assert(n_fds);
1088
1089         if ((r = service_get_sockets(s, &set)) < 0)
1090                 return r;
1091
1092         SET_FOREACH(sock, set, i) {
1093                 int *cfds;
1094                 unsigned cn_fds;
1095
1096                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1097                         goto fail;
1098
1099                 if (!cfds)
1100                         continue;
1101
1102                 if (!rfds) {
1103                         rfds = cfds;
1104                         rn_fds = cn_fds;
1105                 } else {
1106                         int *t;
1107
1108                         if (!(t = new(int, rn_fds+cn_fds))) {
1109                                 free(cfds);
1110                                 r = -ENOMEM;
1111                                 goto fail;
1112                         }
1113
1114                         memcpy(t, rfds, rn_fds);
1115                         memcpy(t+rn_fds, cfds, cn_fds);
1116                         free(rfds);
1117                         free(cfds);
1118
1119                         rfds = t;
1120                         rn_fds = rn_fds+cn_fds;
1121                 }
1122         }
1123
1124         *fds = rfds;
1125         *n_fds = rn_fds;
1126
1127         set_free(set);
1128
1129         return 0;
1130
1131 fail:
1132         set_free(set);
1133         free(rfds);
1134
1135         return r;
1136 }
1137
1138 static int service_spawn(
1139                 Service *s,
1140                 ExecCommand *c,
1141                 bool timeout,
1142                 bool pass_fds,
1143                 bool apply_permissions,
1144                 bool apply_chroot,
1145                 pid_t *_pid) {
1146
1147         pid_t pid;
1148         int r;
1149         int *fds = NULL;
1150         unsigned n_fds = 0;
1151         char **argv;
1152
1153         assert(s);
1154         assert(c);
1155         assert(_pid);
1156
1157         if (pass_fds) {
1158                 if (s->socket_fd >= 0) {
1159                         fds = &s->socket_fd;
1160                         n_fds = 1;
1161                 } else if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1162                         goto fail;
1163         }
1164
1165         if (timeout && s->timeout_usec) {
1166                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1167                         goto fail;
1168         } else
1169                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1170
1171         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1172                 r = -ENOMEM;
1173                 goto fail;
1174         }
1175
1176         r = exec_spawn(c,
1177                        argv,
1178                        &s->exec_context,
1179                        fds, n_fds,
1180                        apply_permissions,
1181                        apply_chroot,
1182                        UNIT(s)->meta.manager->confirm_spawn,
1183                        UNIT(s)->meta.cgroup_bondings,
1184                        &pid);
1185
1186         strv_free(argv);
1187         if (r < 0)
1188                 goto fail;
1189
1190         if (fds) {
1191                 if (s->socket_fd >= 0)
1192                         service_close_socket_fd(s);
1193                 else
1194                         free(fds);
1195         }
1196
1197         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1198                 /* FIXME: we need to do something here */
1199                 goto fail;
1200
1201         *_pid = pid;
1202
1203         return 0;
1204
1205 fail:
1206         free(fds);
1207
1208         if (timeout)
1209                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1210
1211         return r;
1212 }
1213
1214 static int main_pid_good(Service *s) {
1215         assert(s);
1216
1217         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1218          * don't know */
1219
1220         /* If we know the pid file, then lets just check if it is
1221          * still valid */
1222         if (s->main_pid_known)
1223                 return s->main_pid > 0;
1224
1225         /* We don't know the pid */
1226         return -EAGAIN;
1227 }
1228
1229 static int control_pid_good(Service *s) {
1230         assert(s);
1231
1232         return s->control_pid > 0;
1233 }
1234
1235 static int cgroup_good(Service *s) {
1236         int r;
1237
1238         assert(s);
1239
1240         if (s->valid_no_process)
1241                 return -EAGAIN;
1242
1243         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1244                 return r;
1245
1246         return !r;
1247 }
1248
1249 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1250         int r;
1251         assert(s);
1252
1253         if (!success)
1254                 s->failure = true;
1255
1256         if (allow_restart &&
1257             s->allow_restart &&
1258             (s->restart == SERVICE_RESTART_ALWAYS ||
1259              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1260
1261                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1262                         goto fail;
1263
1264                 service_set_state(s, SERVICE_AUTO_RESTART);
1265         } else
1266                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1267
1268         return;
1269
1270 fail:
1271         log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1272         service_enter_dead(s, false, false);
1273 }
1274
1275 static void service_enter_signal(Service *s, ServiceState state, bool success);
1276
1277 static void service_enter_stop_post(Service *s, bool success) {
1278         int r;
1279         assert(s);
1280
1281         if (!success)
1282                 s->failure = true;
1283
1284         service_unwatch_control_pid(s);
1285
1286         s->control_command_id = SERVICE_EXEC_STOP_POST;
1287         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1288                 if ((r = service_spawn(s,
1289                                        s->control_command,
1290                                        true,
1291                                        false,
1292                                        !s->permissions_start_only,
1293                                        !s->root_directory_start_only,
1294                                        &s->control_pid)) < 0)
1295                         goto fail;
1296
1297
1298                 service_set_state(s, SERVICE_STOP_POST);
1299         } else
1300                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1301
1302         return;
1303
1304 fail:
1305         log_warning("%s failed to run stop-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1306         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1307 }
1308
1309 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1310         int r;
1311         bool sent = false;
1312
1313         assert(s);
1314
1315         if (!success)
1316                 s->failure = true;
1317
1318         if (s->kill_mode != KILL_NONE) {
1319                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1320
1321                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1322
1323                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1324                                 if (r != -EAGAIN && r != -ESRCH)
1325                                         goto fail;
1326                         } else
1327                                 sent = true;
1328                 }
1329
1330                 if (!sent) {
1331                         r = 0;
1332
1333                         if (s->main_pid > 0) {
1334                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1335                                         r = -errno;
1336                                 else
1337                                         sent = true;
1338                         }
1339
1340                         if (s->control_pid > 0) {
1341                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1342                                         r = -errno;
1343                                 else
1344                                         sent = true;
1345                         }
1346
1347                         if (r < 0)
1348                                 goto fail;
1349                 }
1350         }
1351
1352         if (sent && (s->main_pid > 0 || s->control_pid > 0)) {
1353                 if (s->timeout_usec > 0)
1354                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1355                                 goto fail;
1356
1357                 service_set_state(s, state);
1358         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1359                 service_enter_stop_post(s, true);
1360         else
1361                 service_enter_dead(s, true, true);
1362
1363         return;
1364
1365 fail:
1366         log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1367
1368         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1369                 service_enter_stop_post(s, false);
1370         else
1371                 service_enter_dead(s, false, true);
1372 }
1373
1374 static void service_enter_stop(Service *s, bool success) {
1375         int r;
1376         assert(s);
1377
1378         if (!success)
1379                 s->failure = true;
1380
1381         service_unwatch_control_pid(s);
1382
1383         s->control_command_id = SERVICE_EXEC_STOP;
1384         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1385                 if ((r = service_spawn(s,
1386                                        s->control_command,
1387                                        true,
1388                                        false,
1389                                        !s->permissions_start_only,
1390                                        !s->root_directory_start_only,
1391                                        &s->control_pid)) < 0)
1392                         goto fail;
1393
1394                 service_set_state(s, SERVICE_STOP);
1395         } else
1396                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1397
1398         return;
1399
1400 fail:
1401         log_warning("%s failed to run stop executable: %s", UNIT(s)->meta.id, strerror(-r));
1402         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1403 }
1404
1405 static void service_enter_running(Service *s, bool success) {
1406         assert(s);
1407
1408         if (!success)
1409                 s->failure = true;
1410
1411         if (main_pid_good(s) != 0 &&
1412             cgroup_good(s) != 0 &&
1413             (s->bus_name_good || s->type != SERVICE_DBUS))
1414                 service_set_state(s, SERVICE_RUNNING);
1415         else if (s->valid_no_process)
1416                 service_set_state(s, SERVICE_EXITED);
1417         else
1418                 service_enter_stop(s, true);
1419 }
1420
1421 static void service_enter_start_post(Service *s) {
1422         int r;
1423         assert(s);
1424
1425         service_unwatch_control_pid(s);
1426
1427         s->control_command_id = SERVICE_EXEC_START_POST;
1428         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1429                 if ((r = service_spawn(s,
1430                                        s->control_command,
1431                                        true,
1432                                        false,
1433                                        !s->permissions_start_only,
1434                                        !s->root_directory_start_only,
1435                                        &s->control_pid)) < 0)
1436                         goto fail;
1437
1438
1439                 service_set_state(s, SERVICE_START_POST);
1440         } else
1441                 service_enter_running(s, true);
1442
1443         return;
1444
1445 fail:
1446         log_warning("%s failed to run start-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1447         service_enter_stop(s, false);
1448 }
1449
1450 static void service_enter_start(Service *s) {
1451         pid_t pid;
1452         int r;
1453
1454         assert(s);
1455
1456         assert(s->exec_command[SERVICE_EXEC_START]);
1457         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1458
1459         if (s->type == SERVICE_FORKING)
1460                 service_unwatch_control_pid(s);
1461         else
1462                 service_unwatch_main_pid(s);
1463
1464         if ((r = service_spawn(s,
1465                                s->exec_command[SERVICE_EXEC_START],
1466                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS,
1467                                true,
1468                                true,
1469                                true,
1470                                &pid)) < 0)
1471                 goto fail;
1472
1473         if (s->type == SERVICE_SIMPLE) {
1474                 /* For simple services we immediately start
1475                  * the START_POST binaries. */
1476
1477                 s->main_pid = pid;
1478                 s->main_pid_known = true;
1479
1480                 service_enter_start_post(s);
1481
1482         } else  if (s->type == SERVICE_FORKING) {
1483
1484                 /* For forking services we wait until the start
1485                  * process exited. */
1486
1487                 s->control_pid = pid;
1488
1489                 s->control_command_id = SERVICE_EXEC_START;
1490                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1491                 service_set_state(s, SERVICE_START);
1492
1493         } else if (s->type == SERVICE_FINISH ||
1494                    s->type == SERVICE_DBUS) {
1495
1496                 /* For finishing services we wait until the start
1497                  * process exited, too, but it is our main process. */
1498
1499                 /* For D-Bus services we know the main pid right away,
1500                  * but wait for the bus name to appear on the bus. */
1501
1502                 s->main_pid = pid;
1503                 s->main_pid_known = true;
1504
1505                 service_set_state(s, SERVICE_START);
1506         } else
1507                 assert_not_reached("Unknown service type");
1508
1509         return;
1510
1511 fail:
1512         log_warning("%s failed to run start exectuable: %s", UNIT(s)->meta.id, strerror(-r));
1513         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1514 }
1515
1516 static void service_enter_start_pre(Service *s) {
1517         int r;
1518
1519         assert(s);
1520
1521         service_unwatch_control_pid(s);
1522
1523         s->control_command_id = SERVICE_EXEC_START_PRE;
1524         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1525                 if ((r = service_spawn(s,
1526                                        s->control_command,
1527                                        true,
1528                                        false,
1529                                        !s->permissions_start_only,
1530                                        !s->root_directory_start_only,
1531                                        &s->control_pid)) < 0)
1532                         goto fail;
1533
1534                 service_set_state(s, SERVICE_START_PRE);
1535         } else
1536                 service_enter_start(s);
1537
1538         return;
1539
1540 fail:
1541         log_warning("%s failed to run start-pre executable: %s", UNIT(s)->meta.id, strerror(-r));
1542         service_enter_dead(s, false, true);
1543 }
1544
1545 static void service_enter_restart(Service *s) {
1546         int r;
1547         assert(s);
1548
1549         service_enter_dead(s, true, false);
1550
1551         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1552                 goto fail;
1553
1554         log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1555         return;
1556
1557 fail:
1558
1559         log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1560         service_enter_dead(s, false, false);
1561 }
1562
1563 static void service_enter_reload(Service *s) {
1564         int r;
1565
1566         assert(s);
1567
1568         service_unwatch_control_pid(s);
1569
1570         s->control_command_id = SERVICE_EXEC_RELOAD;
1571         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1572                 if ((r = service_spawn(s,
1573                                        s->control_command,
1574                                        true,
1575                                        false,
1576                                        !s->permissions_start_only,
1577                                        !s->root_directory_start_only,
1578                                        &s->control_pid)) < 0)
1579                         goto fail;
1580
1581                 service_set_state(s, SERVICE_RELOAD);
1582         } else
1583                 service_enter_running(s, true);
1584
1585         return;
1586
1587 fail:
1588         log_warning("%s failed to run reload executable: %s", UNIT(s)->meta.id, strerror(-r));
1589         service_enter_stop(s, false);
1590 }
1591
1592 static void service_run_next(Service *s, bool success) {
1593         int r;
1594
1595         assert(s);
1596         assert(s->control_command);
1597         assert(s->control_command->command_next);
1598
1599         if (!success)
1600                 s->failure = true;
1601
1602         s->control_command = s->control_command->command_next;
1603
1604         service_unwatch_control_pid(s);
1605
1606         if ((r = service_spawn(s,
1607                                s->control_command,
1608                                true,
1609                                false,
1610                                !s->permissions_start_only,
1611                                !s->root_directory_start_only,
1612                                &s->control_pid)) < 0)
1613                 goto fail;
1614
1615         return;
1616
1617 fail:
1618         log_warning("%s failed to run spawn next executable: %s", UNIT(s)->meta.id, strerror(-r));
1619
1620         if (s->state == SERVICE_START_PRE)
1621                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1622         else if (s->state == SERVICE_STOP)
1623                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1624         else if (s->state == SERVICE_STOP_POST)
1625                 service_enter_dead(s, false, true);
1626         else
1627                 service_enter_stop(s, false);
1628 }
1629
1630 static int service_start(Unit *u) {
1631         Service *s = SERVICE(u);
1632
1633         assert(s);
1634
1635         /* We cannot fulfill this request right now, try again later
1636          * please! */
1637         if (s->state == SERVICE_STOP ||
1638             s->state == SERVICE_STOP_SIGTERM ||
1639             s->state == SERVICE_STOP_SIGKILL ||
1640             s->state == SERVICE_STOP_POST ||
1641             s->state == SERVICE_FINAL_SIGTERM ||
1642             s->state == SERVICE_FINAL_SIGKILL)
1643                 return -EAGAIN;
1644
1645         /* Already on it! */
1646         if (s->state == SERVICE_START_PRE ||
1647             s->state == SERVICE_START ||
1648             s->state == SERVICE_START_POST)
1649                 return 0;
1650
1651         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1652
1653         /* Make sure we don't enter a busy loop of some kind. */
1654         if (!ratelimit_test(&s->ratelimit)) {
1655                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1656                 return -EAGAIN;
1657         }
1658
1659         s->failure = false;
1660         s->main_pid_known = false;
1661         s->allow_restart = true;
1662
1663         service_enter_start_pre(s);
1664         return 0;
1665 }
1666
1667 static int service_stop(Unit *u) {
1668         Service *s = SERVICE(u);
1669
1670         assert(s);
1671
1672         /* Cannot do this now */
1673         if (s->state == SERVICE_START_PRE ||
1674             s->state == SERVICE_START ||
1675             s->state == SERVICE_START_POST ||
1676             s->state == SERVICE_RELOAD)
1677                 return -EAGAIN;
1678
1679         /* Already on it */
1680         if (s->state == SERVICE_STOP ||
1681             s->state == SERVICE_STOP_SIGTERM ||
1682             s->state == SERVICE_STOP_SIGKILL ||
1683             s->state == SERVICE_STOP_POST ||
1684             s->state == SERVICE_FINAL_SIGTERM ||
1685             s->state == SERVICE_FINAL_SIGKILL)
1686                 return 0;
1687
1688         if (s->state == SERVICE_AUTO_RESTART) {
1689                 service_set_state(s, SERVICE_DEAD);
1690                 return 0;
1691         }
1692
1693         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1694
1695         /* This is a user request, so don't do restarts on this
1696          * shutdown. */
1697         s->allow_restart = false;
1698
1699         service_enter_stop(s, true);
1700         return 0;
1701 }
1702
1703 static int service_reload(Unit *u) {
1704         Service *s = SERVICE(u);
1705
1706         assert(s);
1707
1708         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1709
1710         service_enter_reload(s);
1711         return 0;
1712 }
1713
1714 static bool service_can_reload(Unit *u) {
1715         Service *s = SERVICE(u);
1716
1717         assert(s);
1718
1719         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1720 }
1721
1722 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1723         Service *s = SERVICE(u);
1724
1725         assert(u);
1726         assert(f);
1727         assert(fds);
1728
1729         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1730         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1731
1732         if (s->control_pid > 0)
1733                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) (s->control_pid));
1734
1735         if (s->main_pid > 0)
1736                 unit_serialize_item_format(u, f, "main-pid", "%u", (unsigned) (s->main_pid));
1737
1738         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1739
1740         /* There's a minor uncleanliness here: if there are multiple
1741          * commands attached here, we will start from the first one
1742          * again */
1743         if (s->control_command_id >= 0)
1744                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
1745
1746         if (s->socket_fd >= 0) {
1747                 int copy;
1748
1749                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1750                         return copy;
1751
1752                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1753         }
1754
1755         return 0;
1756 }
1757
1758 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1759         Service *s = SERVICE(u);
1760         int r;
1761
1762         assert(u);
1763         assert(key);
1764         assert(value);
1765         assert(fds);
1766
1767         if (streq(key, "state")) {
1768                 ServiceState state;
1769
1770                 if ((state = service_state_from_string(value)) < 0)
1771                         log_debug("Failed to parse state value %s", value);
1772                 else
1773                         s->deserialized_state = state;
1774         } else if (streq(key, "failure")) {
1775                 int b;
1776
1777                 if ((b = parse_boolean(value)) < 0)
1778                         log_debug("Failed to parse failure value %s", value);
1779                 else
1780                         s->failure = b || s->failure;
1781         } else if (streq(key, "control-pid")) {
1782                 unsigned pid;
1783
1784                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1785                         log_debug("Failed to parse control-pid value %s", value);
1786                 else
1787                         s->control_pid = (pid_t) pid;
1788         } else if (streq(key, "main-pid")) {
1789                 unsigned pid;
1790
1791                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1792                         log_debug("Failed to parse main-pid value %s", value);
1793                 else
1794                         s->main_pid = (pid_t) pid;
1795         } else if (streq(key, "main-pid-known")) {
1796                 int b;
1797
1798                 if ((b = parse_boolean(value)) < 0)
1799                         log_debug("Failed to parse main-pid-known value %s", value);
1800                 else
1801                         s->main_pid_known = b;
1802         } else if (streq(key, "control-command")) {
1803                 ServiceExecCommand id;
1804
1805                 if ((id = service_exec_command_from_string(value)) < 0)
1806                         log_debug("Failed to parse exec-command value %s", value);
1807                 else {
1808                         s->control_command_id = id;
1809                         s->control_command = s->exec_command[id];
1810                 }
1811         } else if (streq(key, "socket-fd")) {
1812                 int fd;
1813
1814                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1815                         log_debug("Failed to parse socket-fd value %s", value);
1816                 else {
1817
1818                         if (s->socket_fd >= 0)
1819                                 close_nointr_nofail(s->socket_fd);
1820                         s->socket_fd = fdset_remove(fds, fd);
1821                 }
1822         } else
1823                 log_debug("Unknown serialization key '%s'", key);
1824
1825         return 0;
1826 }
1827
1828 static UnitActiveState service_active_state(Unit *u) {
1829         assert(u);
1830
1831         return state_translation_table[SERVICE(u)->state];
1832 }
1833
1834 static const char *service_sub_state_to_string(Unit *u) {
1835         assert(u);
1836
1837         return service_state_to_string(SERVICE(u)->state);
1838 }
1839
1840 static bool service_check_gc(Unit *u) {
1841         Service *s = SERVICE(u);
1842
1843         assert(s);
1844
1845         return !!s->sysv_path;
1846 }
1847
1848 static bool service_check_snapshot(Unit *u) {
1849         Service *s = SERVICE(u);
1850
1851         assert(s);
1852
1853         return !s->got_socket_fd;
1854 }
1855
1856 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1857         Service *s = SERVICE(u);
1858         bool success;
1859
1860         assert(s);
1861         assert(pid >= 0);
1862
1863         success = code == CLD_EXITED && status == 0;
1864         s->failure = s->failure || !success;
1865
1866         if (s->main_pid == pid) {
1867
1868                 exec_status_fill(&s->main_exec_status, pid, code, status);
1869                 s->main_pid = 0;
1870
1871                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1872                         assert(s->exec_command[SERVICE_EXEC_START]);
1873                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1874                 }
1875
1876                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
1877
1878                 /* The service exited, so the service is officially
1879                  * gone. */
1880
1881                 switch (s->state) {
1882
1883                 case SERVICE_START_POST:
1884                 case SERVICE_RELOAD:
1885                 case SERVICE_STOP:
1886                         /* Need to wait until the operation is
1887                          * done */
1888                         break;
1889
1890                 case SERVICE_START:
1891                         assert(s->type == SERVICE_FINISH);
1892
1893                         /* This was our main goal, so let's go on */
1894                         if (success)
1895                                 service_enter_start_post(s);
1896                         else
1897                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1898                         break;
1899
1900                 case SERVICE_RUNNING:
1901                         service_enter_running(s, success);
1902                         break;
1903
1904                 case SERVICE_STOP_SIGTERM:
1905                 case SERVICE_STOP_SIGKILL:
1906
1907                         if (!control_pid_good(s))
1908                                 service_enter_stop_post(s, success);
1909
1910                         /* If there is still a control process, wait for that first */
1911                         break;
1912
1913                 default:
1914                         assert_not_reached("Uh, main process died at wrong time.");
1915                 }
1916
1917         } else if (s->control_pid == pid) {
1918
1919                 if (s->control_command)
1920                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
1921
1922                 s->control_pid = 0;
1923
1924                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1925
1926                 /* If we are shutting things down anyway we
1927                  * don't care about failing commands. */
1928
1929                 if (s->control_command && s->control_command->command_next && success) {
1930
1931                         /* There is another command to *
1932                          * execute, so let's do that. */
1933
1934                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
1935                         service_run_next(s, success);
1936
1937                 } else {
1938                         /* No further commands for this step, so let's
1939                          * figure out what to do next */
1940
1941                         s->control_command = NULL;
1942                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1943
1944                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
1945
1946                         switch (s->state) {
1947
1948                         case SERVICE_START_PRE:
1949                                 if (success)
1950                                         service_enter_start(s);
1951                                 else
1952                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1953                                 break;
1954
1955                         case SERVICE_START:
1956                                 assert(s->type == SERVICE_FORKING);
1957
1958                                 /* Let's try to load the pid
1959                                  * file here if we can. We
1960                                  * ignore the return value,
1961                                  * since the PID file might
1962                                  * actually be created by a
1963                                  * START_POST script */
1964
1965                                 if (success) {
1966                                         if (s->pid_file)
1967                                                 service_load_pid_file(s);
1968
1969                                         service_enter_start_post(s);
1970                                 } else
1971                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1972
1973                                 break;
1974
1975                         case SERVICE_START_POST:
1976                                 if (success && s->pid_file && !s->main_pid_known) {
1977                                         int r;
1978
1979                                         /* Hmm, let's see if we can
1980                                          * load the pid now after the
1981                                          * start-post scripts got
1982                                          * executed. */
1983
1984                                         if ((r = service_load_pid_file(s)) < 0)
1985                                                 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
1986                                 }
1987
1988                                 /* Fall through */
1989
1990                         case SERVICE_RELOAD:
1991                                 if (success)
1992                                         service_enter_running(s, true);
1993                                 else
1994                                         service_enter_stop(s, false);
1995
1996                                 break;
1997
1998                         case SERVICE_STOP:
1999                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2000                                 break;
2001
2002                         case SERVICE_STOP_SIGTERM:
2003                         case SERVICE_STOP_SIGKILL:
2004                                 if (main_pid_good(s) <= 0)
2005                                         service_enter_stop_post(s, success);
2006
2007                                 /* If there is still a service
2008                                  * process around, wait until
2009                                  * that one quit, too */
2010                                 break;
2011
2012                         case SERVICE_STOP_POST:
2013                         case SERVICE_FINAL_SIGTERM:
2014                         case SERVICE_FINAL_SIGKILL:
2015                                 service_enter_dead(s, success, true);
2016                                 break;
2017
2018                         default:
2019                                 assert_not_reached("Uh, control process died at wrong time.");
2020                         }
2021                 }
2022         } else
2023                 assert_not_reached("Got SIGCHLD for unkown PID");
2024 }
2025
2026 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2027         Service *s = SERVICE(u);
2028
2029         assert(s);
2030         assert(elapsed == 1);
2031
2032         assert(w == &s->timer_watch);
2033
2034         switch (s->state) {
2035
2036         case SERVICE_START_PRE:
2037         case SERVICE_START:
2038                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2039                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2040                 break;
2041
2042         case SERVICE_START_POST:
2043         case SERVICE_RELOAD:
2044                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2045                 service_enter_stop(s, false);
2046                 break;
2047
2048         case SERVICE_STOP:
2049                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2050                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2051                 break;
2052
2053         case SERVICE_STOP_SIGTERM:
2054                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2055                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2056                 break;
2057
2058         case SERVICE_STOP_SIGKILL:
2059                 /* Uh, wie sent a SIGKILL and it is still not gone?
2060                  * Must be something we cannot kill, so let's just be
2061                  * weirded out and continue */
2062
2063                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2064                 service_enter_stop_post(s, false);
2065                 break;
2066
2067         case SERVICE_STOP_POST:
2068                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2069                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2070                 break;
2071
2072         case SERVICE_FINAL_SIGTERM:
2073                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2074                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2075                 break;
2076
2077         case SERVICE_FINAL_SIGKILL:
2078                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
2079                 service_enter_dead(s, false, true);
2080                 break;
2081
2082         case SERVICE_AUTO_RESTART:
2083                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2084                 service_enter_restart(s);
2085                 break;
2086
2087         default:
2088                 assert_not_reached("Timeout at wrong time.");
2089         }
2090 }
2091
2092 static void service_cgroup_notify_event(Unit *u) {
2093         Service *s = SERVICE(u);
2094
2095         assert(u);
2096
2097         log_debug("%s: cgroup is empty", u->meta.id);
2098
2099         switch (s->state) {
2100
2101                 /* Waiting for SIGCHLD is usually more interesting,
2102                  * because it includes return codes/signals. Which is
2103                  * why we ignore the cgroup events for most cases,
2104                  * except when we don't know pid which to expect the
2105                  * SIGCHLD for. */
2106
2107         case SERVICE_RUNNING:
2108                 service_enter_running(s, true);
2109                 break;
2110
2111         default:
2112                 ;
2113         }
2114 }
2115
2116 static int service_enumerate(Manager *m) {
2117         char **p;
2118         unsigned i;
2119         DIR *d = NULL;
2120         char *path = NULL, *fpath = NULL, *name = NULL;
2121         int r;
2122
2123         assert(m);
2124
2125         STRV_FOREACH(p, m->sysvrcnd_path)
2126                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2127                         struct dirent *de;
2128
2129                         free(path);
2130                         path = NULL;
2131                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2132                                 r = -ENOMEM;
2133                                 goto finish;
2134                         }
2135
2136                         if (d)
2137                                 closedir(d);
2138
2139                         if (!(d = opendir(path))) {
2140                                 if (errno != ENOENT)
2141                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2142
2143                                 continue;
2144                         }
2145
2146                         while ((de = readdir(d))) {
2147                                 Unit *service;
2148                                 int a, b;
2149
2150                                 if (ignore_file(de->d_name))
2151                                         continue;
2152
2153                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2154                                         continue;
2155
2156                                 if (strlen(de->d_name) < 4)
2157                                         continue;
2158
2159                                 a = undecchar(de->d_name[1]);
2160                                 b = undecchar(de->d_name[2]);
2161
2162                                 if (a < 0 || b < 0)
2163                                         continue;
2164
2165                                 free(fpath);
2166                                 fpath = NULL;
2167                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2168                                         r = -ENOMEM;
2169                                         goto finish;
2170                                 }
2171
2172                                 if (access(fpath, X_OK) < 0) {
2173
2174                                         if (errno != ENOENT)
2175                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2176
2177                                         continue;
2178                                 }
2179
2180                                 free(name);
2181                                 name = NULL;
2182                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
2183                                         r = -ENOMEM;
2184                                         goto finish;
2185                                 }
2186
2187                                 if ((r = manager_load_unit_prepare(m, name, NULL, &service)) < 0)
2188                                         goto finish;
2189
2190                                 if (de->d_name[0] == 'S')
2191                                         SERVICE(service)->sysv_start_priority = a*10 + b;
2192
2193                                 manager_dispatch_load_queue(m);
2194                                 service = unit_follow_merge(service);
2195
2196                                 if (de->d_name[0] == 'S') {
2197                                         Unit *runlevel_target;
2198
2199                                         if ((r = manager_load_unit(m, rcnd_table[i+1], NULL, &runlevel_target)) < 0)
2200                                                 goto finish;
2201
2202                                         if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2203                                                 goto finish;
2204
2205                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, runlevel_target, true)) < 0)
2206                                                 goto finish;
2207
2208                                 } else if (de->d_name[0] == 'K' &&
2209                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
2210                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
2211
2212                                         Unit *shutdown_target;
2213
2214                                         /* We honour K links only for
2215                                          * halt/reboot. For the normal
2216                                          * runlevels we assume the
2217                                          * stop jobs will be
2218                                          * implicitly added by the
2219                                          * core logic. Also, we don't
2220                                          * really distuingish here
2221                                          * between the runlevels 0 and
2222                                          * 6 and just add them to the
2223                                          * special shutdown target. */
2224
2225                                         if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2226                                                 goto finish;
2227
2228                                         if ((r = unit_add_dependency(service, UNIT_CONFLICTS, shutdown_target, true)) < 0)
2229                                                 goto finish;
2230
2231                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, shutdown_target, true)) < 0)
2232                                                 goto finish;
2233                                 }
2234                         }
2235                 }
2236
2237         r = 0;
2238
2239 finish:
2240         free(path);
2241         free(fpath);
2242         free(name);
2243         closedir(d);
2244
2245         return r;
2246 }
2247
2248 static void service_bus_name_owner_change(
2249                 Unit *u,
2250                 const char *name,
2251                 const char *old_owner,
2252                 const char *new_owner) {
2253
2254         Service *s = SERVICE(u);
2255
2256         assert(s);
2257         assert(name);
2258
2259         assert(streq(s->bus_name, name));
2260         assert(old_owner || new_owner);
2261
2262         if (old_owner && new_owner)
2263                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2264         else if (old_owner)
2265                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2266         else
2267                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2268
2269         s->bus_name_good = !!new_owner;
2270
2271         if (s->type == SERVICE_DBUS) {
2272
2273                 /* service_enter_running() will figure out what to
2274                  * do */
2275                 if (s->state == SERVICE_RUNNING)
2276                         service_enter_running(s, true);
2277                 else if (s->state == SERVICE_START && new_owner)
2278                         service_enter_start_post(s);
2279
2280         } else if (new_owner &&
2281                    s->main_pid <= 0 &&
2282                    (s->state == SERVICE_START ||
2283                     s->state == SERVICE_START_POST ||
2284                     s->state == SERVICE_RUNNING ||
2285                     s->state == SERVICE_RELOAD)) {
2286
2287                 /* Try to acquire PID from bus service */
2288                 log_debug("Trying to acquire PID from D-Bus name...");
2289
2290                 bus_query_pid(u->meta.manager, name);
2291         }
2292 }
2293
2294 static void service_bus_query_pid_done(
2295                 Unit *u,
2296                 const char *name,
2297                 pid_t pid) {
2298
2299         Service *s = SERVICE(u);
2300
2301         assert(s);
2302         assert(name);
2303
2304         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2305
2306         if (s->main_pid <= 0 &&
2307             (s->state == SERVICE_START ||
2308              s->state == SERVICE_START_POST ||
2309              s->state == SERVICE_RUNNING ||
2310              s->state == SERVICE_RELOAD))
2311                 s->main_pid = pid;
2312 }
2313
2314 int service_set_socket_fd(Service *s, int fd) {
2315         assert(s);
2316         assert(fd >= 0);
2317
2318         /* This is called by the socket code when instantiating a new
2319          * service for a stream socket and the socket needs to be
2320          * configured. */
2321
2322         if (UNIT(s)->meta.load_state != UNIT_LOADED)
2323                 return -EINVAL;
2324
2325         if (s->socket_fd >= 0)
2326                 return -EBUSY;
2327
2328         if (s->state != SERVICE_DEAD)
2329                 return -EAGAIN;
2330
2331         s->socket_fd = fd;
2332         s->got_socket_fd = true;
2333         return 0;
2334 }
2335
2336 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2337         [SERVICE_DEAD] = "dead",
2338         [SERVICE_START_PRE] = "start-pre",
2339         [SERVICE_START] = "start",
2340         [SERVICE_START_POST] = "start-post",
2341         [SERVICE_RUNNING] = "running",
2342         [SERVICE_EXITED] = "exited",
2343         [SERVICE_RELOAD] = "reload",
2344         [SERVICE_STOP] = "stop",
2345         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2346         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2347         [SERVICE_STOP_POST] = "stop-post",
2348         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2349         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2350         [SERVICE_MAINTAINANCE] = "maintainance",
2351         [SERVICE_AUTO_RESTART] = "auto-restart",
2352 };
2353
2354 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2355
2356 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2357         [SERVICE_ONCE] = "once",
2358         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2359         [SERVICE_RESTART_ALWAYS] = "restart-always",
2360 };
2361
2362 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2363
2364 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2365         [SERVICE_FORKING] = "forking",
2366         [SERVICE_SIMPLE] = "simple",
2367         [SERVICE_FINISH] = "finish",
2368         [SERVICE_DBUS] = "dbus"
2369 };
2370
2371 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2372
2373 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2374         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2375         [SERVICE_EXEC_START] = "ExecStart",
2376         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2377         [SERVICE_EXEC_RELOAD] = "ExecReload",
2378         [SERVICE_EXEC_STOP] = "ExecStop",
2379         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2380 };
2381
2382 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2383
2384 const UnitVTable service_vtable = {
2385         .suffix = ".service",
2386
2387         .init = service_init,
2388         .done = service_done,
2389         .load = service_load,
2390
2391         .coldplug = service_coldplug,
2392
2393         .dump = service_dump,
2394
2395         .start = service_start,
2396         .stop = service_stop,
2397         .reload = service_reload,
2398
2399         .can_reload = service_can_reload,
2400
2401         .serialize = service_serialize,
2402         .deserialize_item = service_deserialize_item,
2403
2404         .active_state = service_active_state,
2405         .sub_state_to_string = service_sub_state_to_string,
2406
2407         .check_gc = service_check_gc,
2408         .check_snapshot = service_check_snapshot,
2409
2410         .sigchld_event = service_sigchld_event,
2411         .timer_event = service_timer_event,
2412
2413         .cgroup_notify_empty = service_cgroup_notify_event,
2414
2415         .bus_name_owner_change = service_bus_name_owner_change,
2416         .bus_query_pid_done = service_bus_query_pid_done,
2417
2418         .bus_message_handler = bus_service_message_handler,
2419
2420         .enumerate = service_enumerate
2421 };