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
  41 typedef enum RunlevelType {
  42         RUNLEVEL_UP,
  43         RUNLEVEL_DOWN,
  44         RUNLEVEL_BASIC
  45 } RunlevelType;
  46
  47 static const struct {
  48         const char *path;
  49         const char *target;
  50         const RunlevelType type;
  51 } rcnd_table[] = {
  52         { "/rc0.d",  SPECIAL_RUNLEVEL0_TARGET, RUNLEVEL_DOWN },
  53         { "/rc1.d",  SPECIAL_RUNLEVEL1_TARGET, RUNLEVEL_UP },
  54         { "/rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  55         { "/rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  56         { "/rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  57         { "/rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  58         { "/rc6.d",  SPECIAL_RUNLEVEL6_TARGET, RUNLEVEL_DOWN },
  59         { "/boot.d", SPECIAL_BASIC_TARGET,     RUNLEVEL_BASIC },
  60 };
  61
  62 #define RUNLEVELS_UP "12345"
  63 #define RUNLEVELS_DOWN "06"
  64
  65 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  66         [SERVICE_DEAD] = UNIT_INACTIVE,
  67         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  68         [SERVICE_START] = UNIT_ACTIVATING,
  69         [SERVICE_START_POST] = UNIT_ACTIVATING,
  70         [SERVICE_RUNNING] = UNIT_ACTIVE,
  71         [SERVICE_EXITED] = UNIT_ACTIVE,
  72         [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
  73         [SERVICE_STOP] = UNIT_DEACTIVATING,
  74         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  75         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  76         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  77         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  78         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  79         [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
  80         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
  81 };
  82
  83 static void service_init(Unit *u) {
  84         Service *s = SERVICE(u);
  85
  86         assert(u);
  87         assert(u->meta.load_state == UNIT_STUB);
  88
  89         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  90         s->restart_usec = DEFAULT_RESTART_USEC;
  91         s->timer_watch.type = WATCH_INVALID;
  92         s->sysv_start_priority = -1;
  93         s->socket_fd = -1;
  94
  95         exec_context_init(&s->exec_context);
  96
  97         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
  98
  99         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 100 }
 101
 102 static void service_unwatch_control_pid(Service *s) {
 103         assert(s);
 104
 105         if (s->control_pid <= 0)
 106                 return;
 107
 108         unit_unwatch_pid(UNIT(s), s->control_pid);
 109         s->control_pid = 0;
 110 }
 111
 112 static void service_unwatch_main_pid(Service *s) {
 113         assert(s);
 114
 115         if (s->main_pid <= 0)
 116                 return;
 117
 118         unit_unwatch_pid(UNIT(s), s->main_pid);
 119         s->main_pid = 0;
 120 }
 121
 122 static void service_close_socket_fd(Service *s) {
 123         assert(s);
 124
 125         if (s->socket_fd < 0)
 126                 return;
 127
 128         close_nointr_nofail(s->socket_fd);
 129         s->socket_fd = -1;
 130 }
 131
 132 static void service_done(Unit *u) {
 133         Service *s = SERVICE(u);
 134
 135         assert(s);
 136
 137         free(s->pid_file);
 138         s->pid_file = NULL;
 139
 140         free(s->sysv_path);
 141         s->sysv_path = NULL;
 142
 143         free(s->sysv_runlevels);
 144         s->sysv_runlevels = NULL;
 145
 146         exec_context_done(&s->exec_context);
 147         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 148         s->control_command = NULL;
 149
 150         /* This will leak a process, but at least no memory or any of
 151          * our resources */
 152         service_unwatch_main_pid(s);
 153         service_unwatch_control_pid(s);
 154
 155         if (s->bus_name)  {
 156                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 157                 free(s->bus_name);
 158                 s->bus_name = NULL;
 159         }
 160
 161         service_close_socket_fd(s);
 162
 163         unit_unwatch_timer(u, &s->timer_watch);
 164 }
 165
 166 static int sysv_translate_name(const char *name, char **_r) {
 167
 168         static const char * const table[] = {
 169                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 170                 "$network",   SPECIAL_NETWORK_TARGET,
 171                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 172                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 173                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 174                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 175                 "$time",      SPECIAL_RTC_SET_TARGET
 176         };
 177
 178         unsigned i;
 179         char *r;
 180
 181         for (i = 0; i < ELEMENTSOF(table); i += 2)
 182                 if (streq(table[i], name)) {
 183                         if (!(r = strdup(table[i+1])))
 184                                 return -ENOMEM;
 185
 186                         goto finish;
 187                 }
 188
 189         if (*name == '$')
 190                 return 0;
 191
 192         if (asprintf(&r, "%s.service", name) < 0)
 193                 return -ENOMEM;
 194
 195 finish:
 196
 197         if (_r)
 198                 *_r = r;
 199
 200         return 1;
 201 }
 202
 203 static int sysv_chkconfig_order(Service *s) {
 204         Meta *other;
 205         int r;
 206
 207         assert(s);
 208
 209         if (s->sysv_start_priority < 0)
 210                 return 0;
 211
 212         /* For each pair of services where at least one lacks a LSB
 213          * header, we use the start priority value to order things. */
 214
 215         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 216                 Service *t;
 217                 UnitDependency d;
 218
 219                 t = (Service*) other;
 220
 221                 if (s == t)
 222                         continue;
 223
 224                 if (t->sysv_start_priority < 0)
 225                         continue;
 226
 227                 /* If both units have modern headers we don't care
 228                  * about the priorities */
 229                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 230                     (!t->sysv_path || t->sysv_has_lsb))
 231                         continue;
 232
 233                 if (t->sysv_start_priority < s->sysv_start_priority)
 234                         d = UNIT_AFTER;
 235                 else if (t->sysv_start_priority > s->sysv_start_priority)
 236                         d = UNIT_BEFORE;
 237                 else
 238                         continue;
 239
 240                 /* FIXME: Maybe we should compare the name here lexicographically? */
 241
 242                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 243                         return r;
 244         }
 245
 246         return 0;
 247 }
 248
 249 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 250         ExecCommand *c;
 251
 252         if (!(c = new0(ExecCommand, 1)))
 253                 return NULL;
 254
 255         if (!(c->path = strdup(path))) {
 256                 free(c);
 257                 return NULL;
 258         }
 259
 260         if (!(c->argv = strv_new(path, arg1, NULL))) {
 261                 free(c->path);
 262                 free(c);
 263                 return NULL;
 264         }
 265
 266         return c;
 267 }
 268
 269 static int sysv_exec_commands(Service *s) {
 270         ExecCommand *c;
 271
 272         assert(s);
 273         assert(s->sysv_path);
 274
 275         if (!(c = exec_command_new(s->sysv_path, "start")))
 276                 return -ENOMEM;
 277         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 278
 279         if (!(c = exec_command_new(s->sysv_path, "stop")))
 280                 return -ENOMEM;
 281         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 282
 283         if (!(c = exec_command_new(s->sysv_path, "reload")))
 284                 return -ENOMEM;
 285         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 286
 287         return 0;
 288 }
 289
 290 static int service_load_sysv_path(Service *s, const char *path) {
 291         FILE *f;
 292         Unit *u;
 293         unsigned line = 0;
 294         int r;
 295         enum {
 296                 NORMAL,
 297                 DESCRIPTION,
 298                 LSB,
 299                 LSB_DESCRIPTION
 300         } state = NORMAL;
 301
 302         assert(s);
 303         assert(path);
 304
 305         u = UNIT(s);
 306
 307         if (!(f = fopen(path, "re"))) {
 308                 r = errno == ENOENT ? 0 : -errno;
 309                 goto finish;
 310         }
 311
 312         s->type = SERVICE_FORKING;
 313         s->restart = SERVICE_ONCE;
 314
 315         free(s->sysv_path);
 316         if (!(s->sysv_path = strdup(path))) {
 317                 r = -ENOMEM;
 318                 goto finish;
 319         }
 320
 321         while (!feof(f)) {
 322                 char l[LINE_MAX], *t;
 323
 324                 if (!fgets(l, sizeof(l), f)) {
 325                         if (feof(f))
 326                                 break;
 327
 328                         r = -errno;
 329                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 330                         goto finish;
 331                 }
 332
 333                 line++;
 334
 335                 t = strstrip(l);
 336                 if (*t != '#')
 337                         continue;
 338
 339                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 340                         state = LSB;
 341                         s->sysv_has_lsb = true;
 342                         continue;
 343                 }
 344
 345                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 346                         state = NORMAL;
 347                         continue;
 348                 }
 349
 350                 t++;
 351                 t += strspn(t, WHITESPACE);
 352
 353                 if (state == NORMAL) {
 354
 355                         /* Try to parse Red Hat style chkconfig headers */
 356
 357                         if (startswith(t, "chkconfig:")) {
 358                                 int start_priority;
 359                                 char runlevels[16], *k;
 360
 361                                 state = NORMAL;
 362
 363                                 if (sscanf(t+10, "%15s %i %*i",
 364                                            runlevels,
 365                                            &start_priority) != 2) {
 366
 367                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 368                                         continue;
 369                                 }
 370
 371                                 if (start_priority < 0 || start_priority > 99)
 372                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 373                                 else if (s->sysv_start_priority < 0)
 374                                         s->sysv_start_priority = start_priority;
 375
 376                                 char_array_0(runlevels);
 377                                 k = delete_chars(runlevels, WHITESPACE "-");
 378
 379                                 if (k[0]) {
 380                                         char *d;
 381
 382                                         if (!(d = strdup(k))) {
 383                                                 r = -ENOMEM;
 384                                                 goto finish;
 385                                         }
 386
 387                                         free(s->sysv_runlevels);
 388                                         s->sysv_runlevels = d;
 389                                 }
 390
 391                         } else if (startswith(t, "description:")) {
 392
 393                                 size_t k = strlen(t);
 394                                 char *d;
 395
 396                                 if (t[k-1] == '\\') {
 397                                         state = DESCRIPTION;
 398                                         t[k-1] = 0;
 399                                 }
 400
 401                                 if (!(d = strdup(strstrip(t+12)))) {
 402                                         r = -ENOMEM;
 403                                         goto finish;
 404                                 }
 405
 406                                 free(u->meta.description);
 407                                 u->meta.description = d;
 408
 409                         } else if (startswith(t, "pidfile:")) {
 410
 411                                 char *fn;
 412
 413                                 state = NORMAL;
 414
 415                                 fn = strstrip(t+8);
 416                                 if (!path_is_absolute(fn)) {
 417                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 418                                         continue;
 419                                 }
 420
 421                                 if (!(fn = strdup(fn))) {
 422                                         r = -ENOMEM;
 423                                         goto finish;
 424                                 }
 425
 426                                 free(s->pid_file);
 427                                 s->pid_file = fn;
 428                         }
 429
 430                 } else if (state == DESCRIPTION) {
 431
 432                         /* Try to parse Red Hat style description
 433                          * continuation */
 434
 435                         size_t k = strlen(t);
 436                         char *d;
 437
 438                         if (t[k-1] == '\\')
 439                                 t[k-1] = 0;
 440                         else
 441                                 state = NORMAL;
 442
 443                         assert(u->meta.description);
 444                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 445                                 r = -ENOMEM;
 446                                 goto finish;
 447                         }
 448
 449                         free(u->meta.description);
 450                         u->meta.description = d;
 451
 452                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 453
 454                         if (startswith(t, "Provides:")) {
 455                                 char *i, *w;
 456                                 size_t z;
 457
 458                                 state = LSB;
 459
 460                                 FOREACH_WORD(w, z, t+9, i) {
 461                                         char *n, *m;
 462
 463                                         if (!(n = strndup(w, z))) {
 464                                                 r = -ENOMEM;
 465                                                 goto finish;
 466                                         }
 467
 468                                         r = sysv_translate_name(n, &m);
 469                                         free(n);
 470
 471                                         if (r < 0)
 472                                                 goto finish;
 473
 474                                         if (r == 0)
 475                                                 continue;
 476
 477                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 478                                                 r = unit_add_name(u, m);
 479                                         else {
 480                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m, NULL, true)) >= 0)
 481                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 482                                         }
 483
 484                                         free(m);
 485
 486                                         if (r < 0)
 487                                                 goto finish;
 488                                 }
 489
 490                         } else if (startswith(t, "Required-Start:") ||
 491                                    startswith(t, "Should-Start:")) {
 492                                 char *i, *w;
 493                                 size_t z;
 494
 495                                 state = LSB;
 496
 497                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 498                                         char *n, *m;
 499
 500                                         if (!(n = strndup(w, z))) {
 501                                                 r = -ENOMEM;
 502                                                 goto finish;
 503                                         }
 504
 505                                         r = sysv_translate_name(n, &m);
 506                                         free(n);
 507
 508                                         if (r < 0)
 509                                                 goto finish;
 510
 511                                         if (r == 0)
 512                                                 continue;
 513
 514                                         r = unit_add_dependency_by_name(u, UNIT_AFTER, m, NULL, true);
 515                                         free(m);
 516
 517                                         if (r < 0)
 518                                                 goto finish;
 519                                 }
 520                         } else if (startswith(t, "Default-Start:")) {
 521                                 char *k, *d;
 522
 523                                 state = LSB;
 524
 525                                 k = delete_chars(t+14, WHITESPACE "-");
 526
 527                                 if (k[0] != 0) {
 528                                         if (!(d = strdup(k))) {
 529                                                 r = -ENOMEM;
 530                                                 goto finish;
 531                                         }
 532
 533                                         free(s->sysv_runlevels);
 534                                         s->sysv_runlevels = d;
 535                                 }
 536
 537                         } else if (startswith(t, "Description:")) {
 538                                 char *d;
 539
 540                                 state = LSB_DESCRIPTION;
 541
 542                                 if (!(d = strdup(strstrip(t+12)))) {
 543                                         r = -ENOMEM;
 544                                         goto finish;
 545                                 }
 546
 547                                 free(u->meta.description);
 548                                 u->meta.description = d;
 549
 550                         } else if (startswith(t, "Short-Description:") &&
 551                                    !u->meta.description) {
 552                                 char *d;
 553
 554                                 /* We use the short description only
 555                                  * if no long description is set. */
 556
 557                                 state = LSB;
 558
 559                                 if (!(d = strdup(strstrip(t+18)))) {
 560                                         r = -ENOMEM;
 561                                         goto finish;
 562                                 }
 563
 564                                 u->meta.description = d;
 565
 566                         } else if (state == LSB_DESCRIPTION) {
 567
 568                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 569                                         char *d;
 570
 571                                         assert(u->meta.description);
 572                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 573                                                 r = -ENOMEM;
 574                                                 goto finish;
 575                                         }
 576
 577                                         free(u->meta.description);
 578                                         u->meta.description = d;
 579                                 } else
 580                                         state = LSB;
 581                         }
 582                 }
 583         }
 584
 585         /* If init scripts have no LSB header, then we enforce the
 586          * ordering via the chkconfig priorities. We try to determine
 587          * a priority for *all* init scripts here, since they are
 588          * needed as soon as at least one non-LSB script is used. */
 589
 590         if (s->sysv_start_priority < 0)
 591                 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", u->meta.id);
 592
 593         if ((r = sysv_exec_commands(s)) < 0)
 594                 goto finish;
 595
 596         if (!s->sysv_runlevels || chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 597                 /* If there a runlevels configured for this service
 598                  * but none of the standard ones, then we assume this
 599                  * is some special kind of service (which might be
 600                  * needed for early boot) and don't create any links
 601                  * to it. */
 602
 603                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0 ||
 604                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 605                         goto finish;
 606
 607         } else
 608                 /* Don't timeout special services during boot (like fsck) */
 609                 s->timeout_usec = 0;
 610
 611         /* Special setting for all SysV services */
 612         s->valid_no_process = true;
 613         s->kill_mode = KILL_PROCESS_GROUP;
 614
 615         u->meta.load_state = UNIT_LOADED;
 616         r = 0;
 617
 618 finish:
 619
 620         if (f)
 621                 fclose(f);
 622
 623         return r;
 624 }
 625
 626 static int service_load_sysv_name(Service *s, const char *name) {
 627         char **p;
 628
 629         assert(s);
 630         assert(name);
 631
 632         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 633                 char *path;
 634                 int r;
 635
 636                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 637                         return -ENOMEM;
 638
 639                 assert(endswith(path, ".service"));
 640                 path[strlen(path)-8] = 0;
 641
 642                 r = service_load_sysv_path(s, path);
 643                 free(path);
 644
 645                 if (r < 0)
 646                         return r;
 647
 648                 if ((UNIT(s)->meta.load_state != UNIT_STUB))
 649                         break;
 650         }
 651
 652         return 0;
 653 }
 654
 655 static int service_load_sysv(Service *s) {
 656         const char *t;
 657         Iterator i;
 658         int r;
 659
 660         assert(s);
 661
 662         /* Load service data from SysV init scripts, preferably with
 663          * LSB headers ... */
 664
 665         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 666                 return 0;
 667
 668         if ((t = UNIT(s)->meta.id))
 669                 if ((r = service_load_sysv_name(s, t)) < 0)
 670                         return r;
 671
 672         if (UNIT(s)->meta.load_state == UNIT_STUB)
 673                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 674                         if (t == UNIT(s)->meta.id)
 675                                 continue;
 676
 677                         if ((r == service_load_sysv_name(s, t)) < 0)
 678                                 return r;
 679
 680                         if (UNIT(s)->meta.load_state != UNIT_STUB)
 681                                 break;
 682                 }
 683
 684         return 0;
 685 }
 686
 687 static int service_add_bus_name(Service *s) {
 688         char *n;
 689         int r;
 690
 691         assert(s);
 692         assert(s->bus_name);
 693
 694         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 695                 return 0;
 696
 697         r = unit_merge_by_name(UNIT(s), n);
 698         free(n);
 699
 700         return r;
 701 }
 702
 703 static int service_verify(Service *s) {
 704         assert(s);
 705
 706         if (UNIT(s)->meta.load_state != UNIT_LOADED)
 707                 return 0;
 708
 709         if (!s->exec_command[SERVICE_EXEC_START]) {
 710                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->meta.id);
 711                 return -EINVAL;
 712         }
 713
 714         if (s->type == SERVICE_DBUS && !s->bus_name) {
 715                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->meta.id);
 716                 return -EINVAL;
 717         }
 718
 719         return 0;
 720 }
 721
 722 static int service_load(Unit *u) {
 723         int r;
 724         Service *s = SERVICE(u);
 725
 726         assert(s);
 727
 728         /* Load a .service file */
 729         if ((r = unit_load_fragment(u)) < 0)
 730                 return r;
 731
 732         /* Load a classic init script as a fallback, if we couldn't find anything */
 733         if (u->meta.load_state == UNIT_STUB)
 734                 if ((r = service_load_sysv(s)) < 0)
 735                         return r;
 736
 737         /* Still nothing found? Then let's give up */
 738         if (u->meta.load_state == UNIT_STUB)
 739                 return -ENOENT;
 740
 741         /* We were able to load something, then let's add in the
 742          * dropin directories. */
 743         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 744                 return r;
 745
 746         /* This is a new unit? Then let's add in some extras */
 747         if (u->meta.load_state == UNIT_LOADED) {
 748                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 749                         return r;
 750
 751                 if ((r = unit_add_default_cgroup(u)) < 0)
 752                         return r;
 753
 754                 if ((r = sysv_chkconfig_order(s)) < 0)
 755                         return r;
 756
 757                 if (s->bus_name) {
 758                         if ((r = service_add_bus_name(s)) < 0)
 759                                 return r;
 760
 761                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 762                             return r;
 763                 }
 764         }
 765
 766         return service_verify(s);
 767 }
 768
 769 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 770
 771         ServiceExecCommand c;
 772         Service *s = SERVICE(u);
 773         const char *prefix2;
 774         char *p2;
 775
 776         assert(s);
 777
 778         p2 = strappend(prefix, "\t");
 779         prefix2 = p2 ? p2 : prefix;
 780
 781         fprintf(f,
 782                 "%sService State: %s\n"
 783                 "%sPermissionsStartOnly: %s\n"
 784                 "%sRootDirectoryStartOnly: %s\n"
 785                 "%sValidNoProcess: %s\n"
 786                 "%sKillMode: %s\n"
 787                 "%sType: %s\n",
 788                 prefix, service_state_to_string(s->state),
 789                 prefix, yes_no(s->permissions_start_only),
 790                 prefix, yes_no(s->root_directory_start_only),
 791                 prefix, yes_no(s->valid_no_process),
 792                 prefix, kill_mode_to_string(s->kill_mode),
 793                 prefix, service_type_to_string(s->type));
 794
 795         if (s->control_pid > 0)
 796                 fprintf(f,
 797                         "%sControl PID: %llu\n",
 798                         prefix, (unsigned long long) s->control_pid);
 799
 800         if (s->main_pid > 0)
 801                 fprintf(f,
 802                         "%sMain PID: %llu\n",
 803                         prefix, (unsigned long long) s->main_pid);
 804
 805         if (s->pid_file)
 806                 fprintf(f,
 807                         "%sPIDFile: %s\n",
 808                         prefix, s->pid_file);
 809
 810         if (s->bus_name)
 811                 fprintf(f,
 812                         "%sBusName: %s\n"
 813                         "%sBus Name Good: %s\n",
 814                         prefix, s->bus_name,
 815                         prefix, yes_no(s->bus_name_good));
 816
 817         exec_context_dump(&s->exec_context, f, prefix);
 818
 819         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 820
 821                 if (!s->exec_command[c])
 822                         continue;
 823
 824                 fprintf(f, "%s-> %s:\n",
 825                         prefix, service_exec_command_to_string(c));
 826
 827                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 828         }
 829
 830         if (s->sysv_path)
 831                 fprintf(f,
 832                         "%sSysV Init Script Path: %s\n"
 833                         "%sSysV Init Script has LSB Header: %s\n",
 834                         prefix, s->sysv_path,
 835                         prefix, yes_no(s->sysv_has_lsb));
 836
 837         if (s->sysv_start_priority >= 0)
 838                 fprintf(f,
 839                         "%sSysVStartPriority: %i\n",
 840                         prefix, s->sysv_start_priority);
 841
 842         if (s->sysv_runlevels)
 843                 fprintf(f, "%sSysVRunLevels: %s\n",
 844                         prefix, s->sysv_runlevels);
 845
 846         free(p2);
 847 }
 848
 849 static int service_load_pid_file(Service *s) {
 850         char *k;
 851         unsigned long p;
 852         int r;
 853
 854         assert(s);
 855
 856         if (s->main_pid_known)
 857                 return 0;
 858
 859         assert(s->main_pid <= 0);
 860
 861         if (!s->pid_file)
 862                 return -ENOENT;
 863
 864         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 865                 return r;
 866
 867         if ((r = safe_atolu(k, &p)) < 0) {
 868                 free(k);
 869                 return r;
 870         }
 871
 872         if ((unsigned long) (pid_t) p != p)
 873                 return -ERANGE;
 874
 875         if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
 876                 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
 877                             (unsigned long long) p, s->pid_file);
 878                 return -ESRCH;
 879         }
 880
 881         if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
 882                 /* FIXME: we need to do something here */
 883                 return r;
 884
 885         s->main_pid = (pid_t) p;
 886         s->main_pid_known = true;
 887
 888         return 0;
 889 }
 890
 891 static int service_get_sockets(Service *s, Set **_set) {
 892         Set *set;
 893         Iterator i;
 894         char *t;
 895         int r;
 896
 897         assert(s);
 898         assert(_set);
 899
 900         /* Collects all Socket objects that belong to this
 901          * service. Note that a service might have multiple sockets
 902          * via multiple names. */
 903
 904         if (!(set = set_new(NULL, NULL)))
 905                 return -ENOMEM;
 906
 907         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 908                 char *k;
 909                 Unit *p;
 910
 911                 /* Look for all socket objects that go by any of our
 912                  * units and collect their fds */
 913
 914                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 915                         r = -ENOMEM;
 916                         goto fail;
 917                 }
 918
 919                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 920                 free(k);
 921
 922                 if (!p)
 923                         continue;
 924
 925                 if ((r = set_put(set, p)) < 0)
 926                         goto fail;
 927         }
 928
 929         *_set = set;
 930         return 0;
 931
 932 fail:
 933         set_free(set);
 934         return r;
 935 }
 936
 937 static int service_notify_sockets_dead(Service *s) {
 938         Iterator i;
 939         Set *set;
 940         Socket *sock;
 941         int r;
 942
 943         assert(s);
 944
 945         /* Notifies all our sockets when we die */
 946         if ((r = service_get_sockets(s, &set)) < 0)
 947                 return r;
 948
 949         SET_FOREACH(sock, set, i)
 950                 socket_notify_service_dead(sock);
 951
 952         set_free(set);
 953
 954         return 0;
 955 }
 956
 957 static void service_set_state(Service *s, ServiceState state) {
 958         ServiceState old_state;
 959         assert(s);
 960
 961         old_state = s->state;
 962         s->state = state;
 963
 964         if (state != SERVICE_START_PRE &&
 965             state != SERVICE_START &&
 966             state != SERVICE_START_POST &&
 967             state != SERVICE_RELOAD &&
 968             state != SERVICE_STOP &&
 969             state != SERVICE_STOP_SIGTERM &&
 970             state != SERVICE_STOP_SIGKILL &&
 971             state != SERVICE_STOP_POST &&
 972             state != SERVICE_FINAL_SIGTERM &&
 973             state != SERVICE_FINAL_SIGKILL &&
 974             state != SERVICE_AUTO_RESTART)
 975                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 976
 977         if (state != SERVICE_START &&
 978             state != SERVICE_START_POST &&
 979             state != SERVICE_RUNNING &&
 980             state != SERVICE_RELOAD &&
 981             state != SERVICE_STOP &&
 982             state != SERVICE_STOP_SIGTERM &&
 983             state != SERVICE_STOP_SIGKILL)
 984                 service_unwatch_main_pid(s);
 985
 986         if (state != SERVICE_START_PRE &&
 987             state != SERVICE_START &&
 988             state != SERVICE_START_POST &&
 989             state != SERVICE_RELOAD &&
 990             state != SERVICE_STOP &&
 991             state != SERVICE_STOP_SIGTERM &&
 992             state != SERVICE_STOP_SIGKILL &&
 993             state != SERVICE_STOP_POST &&
 994             state != SERVICE_FINAL_SIGTERM &&
 995             state != SERVICE_FINAL_SIGKILL) {
 996                 service_unwatch_control_pid(s);
 997                 s->control_command = NULL;
 998                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 999         }
1000
1001         if (state == SERVICE_DEAD ||
1002             state == SERVICE_STOP ||
1003             state == SERVICE_STOP_SIGTERM ||
1004             state == SERVICE_STOP_SIGKILL ||
1005             state == SERVICE_STOP_POST ||
1006             state == SERVICE_FINAL_SIGTERM ||
1007             state == SERVICE_FINAL_SIGKILL ||
1008             state == SERVICE_MAINTAINANCE ||
1009             state == SERVICE_AUTO_RESTART)
1010                 service_notify_sockets_dead(s);
1011
1012         if (state != SERVICE_START_PRE &&
1013             state != SERVICE_START &&
1014             !(state == SERVICE_DEAD && UNIT(s)->meta.job))
1015                 service_close_socket_fd(s);
1016
1017         if (old_state != state)
1018                 log_debug("%s changed %s -> %s", UNIT(s)->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1019
1020         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1021 }
1022
1023 static int service_coldplug(Unit *u) {
1024         Service *s = SERVICE(u);
1025         int r;
1026
1027         assert(s);
1028         assert(s->state == SERVICE_DEAD);
1029
1030         if (s->deserialized_state != s->state) {
1031
1032                 if (s->deserialized_state == SERVICE_START_PRE ||
1033                     s->deserialized_state == SERVICE_START ||
1034                     s->deserialized_state == SERVICE_START_POST ||
1035                     s->deserialized_state == SERVICE_RELOAD ||
1036                     s->deserialized_state == SERVICE_STOP ||
1037                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1038                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1039                     s->deserialized_state == SERVICE_STOP_POST ||
1040                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1041                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1042                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1043
1044                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1045                                 usec_t k;
1046
1047                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1048
1049                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1050                                         return r;
1051                         }
1052                 }
1053
1054                 if ((s->deserialized_state == SERVICE_START &&
1055                      (s->type == SERVICE_FORKING ||
1056                       s->type == SERVICE_DBUS)) ||
1057                     s->deserialized_state == SERVICE_START_POST ||
1058                     s->deserialized_state == SERVICE_RUNNING ||
1059                     s->deserialized_state == SERVICE_RELOAD ||
1060                     s->deserialized_state == SERVICE_STOP ||
1061                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1062                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1063                         if (s->main_pid > 0)
1064                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1065                                         return r;
1066
1067                 if (s->deserialized_state == SERVICE_START_PRE ||
1068                     s->deserialized_state == SERVICE_START ||
1069                     s->deserialized_state == SERVICE_START_POST ||
1070                     s->deserialized_state == SERVICE_RELOAD ||
1071                     s->deserialized_state == SERVICE_STOP ||
1072                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1073                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1074                     s->deserialized_state == SERVICE_STOP_POST ||
1075                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1076                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1077                         if (s->control_pid > 0)
1078                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1079                                         return r;
1080
1081                 service_set_state(s, s->deserialized_state);
1082         }
1083
1084         return 0;
1085 }
1086
1087 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1088         Iterator i;
1089         int r;
1090         int *rfds = NULL;
1091         unsigned rn_fds = 0;
1092         Set *set;
1093         Socket *sock;
1094
1095         assert(s);
1096         assert(fds);
1097         assert(n_fds);
1098
1099         if ((r = service_get_sockets(s, &set)) < 0)
1100                 return r;
1101
1102         SET_FOREACH(sock, set, i) {
1103                 int *cfds;
1104                 unsigned cn_fds;
1105
1106                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1107                         goto fail;
1108
1109                 if (!cfds)
1110                         continue;
1111
1112                 if (!rfds) {
1113                         rfds = cfds;
1114                         rn_fds = cn_fds;
1115                 } else {
1116                         int *t;
1117
1118                         if (!(t = new(int, rn_fds+cn_fds))) {
1119                                 free(cfds);
1120                                 r = -ENOMEM;
1121                                 goto fail;
1122                         }
1123
1124                         memcpy(t, rfds, rn_fds);
1125                         memcpy(t+rn_fds, cfds, cn_fds);
1126                         free(rfds);
1127                         free(cfds);
1128
1129                         rfds = t;
1130                         rn_fds = rn_fds+cn_fds;
1131                 }
1132         }
1133
1134         *fds = rfds;
1135         *n_fds = rn_fds;
1136
1137         set_free(set);
1138
1139         return 0;
1140
1141 fail:
1142         set_free(set);
1143         free(rfds);
1144
1145         return r;
1146 }
1147
1148 static int service_spawn(
1149                 Service *s,
1150                 ExecCommand *c,
1151                 bool timeout,
1152                 bool pass_fds,
1153                 bool apply_permissions,
1154                 bool apply_chroot,
1155                 pid_t *_pid) {
1156
1157         pid_t pid;
1158         int r;
1159         int *fds = NULL;
1160         unsigned n_fds = 0;
1161         char **argv;
1162
1163         assert(s);
1164         assert(c);
1165         assert(_pid);
1166
1167         if (pass_fds) {
1168                 if (s->socket_fd >= 0) {
1169                         fds = &s->socket_fd;
1170                         n_fds = 1;
1171                 } else if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1172                         goto fail;
1173         }
1174
1175         if (timeout && s->timeout_usec) {
1176                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1177                         goto fail;
1178         } else
1179                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1180
1181         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1182                 r = -ENOMEM;
1183                 goto fail;
1184         }
1185
1186         r = exec_spawn(c,
1187                        argv,
1188                        &s->exec_context,
1189                        fds, n_fds,
1190                        s->meta.manager->environment,
1191                        apply_permissions,
1192                        apply_chroot,
1193                        UNIT(s)->meta.manager->confirm_spawn,
1194                        UNIT(s)->meta.cgroup_bondings,
1195                        &pid);
1196
1197         strv_free(argv);
1198         if (r < 0)
1199                 goto fail;
1200
1201         if (fds) {
1202                 if (s->socket_fd >= 0)
1203                         service_close_socket_fd(s);
1204                 else
1205                         free(fds);
1206         }
1207
1208         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1209                 /* FIXME: we need to do something here */
1210                 goto fail;
1211
1212         *_pid = pid;
1213
1214         return 0;
1215
1216 fail:
1217         free(fds);
1218
1219         if (timeout)
1220                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1221
1222         return r;
1223 }
1224
1225 static int main_pid_good(Service *s) {
1226         assert(s);
1227
1228         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1229          * don't know */
1230
1231         /* If we know the pid file, then lets just check if it is
1232          * still valid */
1233         if (s->main_pid_known)
1234                 return s->main_pid > 0;
1235
1236         /* We don't know the pid */
1237         return -EAGAIN;
1238 }
1239
1240 static int control_pid_good(Service *s) {
1241         assert(s);
1242
1243         return s->control_pid > 0;
1244 }
1245
1246 static int cgroup_good(Service *s) {
1247         int r;
1248
1249         assert(s);
1250
1251         if (s->valid_no_process)
1252                 return -EAGAIN;
1253
1254         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1255                 return r;
1256
1257         return !r;
1258 }
1259
1260 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1261         int r;
1262         assert(s);
1263
1264         if (!success)
1265                 s->failure = true;
1266
1267         if (allow_restart &&
1268             s->allow_restart &&
1269             (s->restart == SERVICE_RESTART_ALWAYS ||
1270              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1271
1272                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1273                         goto fail;
1274
1275                 service_set_state(s, SERVICE_AUTO_RESTART);
1276         } else
1277                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1278
1279         return;
1280
1281 fail:
1282         log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1283         service_enter_dead(s, false, false);
1284 }
1285
1286 static void service_enter_signal(Service *s, ServiceState state, bool success);
1287
1288 static void service_enter_stop_post(Service *s, bool success) {
1289         int r;
1290         assert(s);
1291
1292         if (!success)
1293                 s->failure = true;
1294
1295         service_unwatch_control_pid(s);
1296
1297         s->control_command_id = SERVICE_EXEC_STOP_POST;
1298         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1299                 if ((r = service_spawn(s,
1300                                        s->control_command,
1301                                        true,
1302                                        false,
1303                                        !s->permissions_start_only,
1304                                        !s->root_directory_start_only,
1305                                        &s->control_pid)) < 0)
1306                         goto fail;
1307
1308
1309                 service_set_state(s, SERVICE_STOP_POST);
1310         } else
1311                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1312
1313         return;
1314
1315 fail:
1316         log_warning("%s failed to run stop-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1317         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1318 }
1319
1320 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1321         int r;
1322         bool sent = false;
1323
1324         assert(s);
1325
1326         if (!success)
1327                 s->failure = true;
1328
1329         if (s->kill_mode != KILL_NONE) {
1330                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1331
1332                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1333
1334                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1335                                 if (r != -EAGAIN && r != -ESRCH)
1336                                         goto fail;
1337                         } else
1338                                 sent = true;
1339                 }
1340
1341                 if (!sent) {
1342                         r = 0;
1343
1344                         if (s->main_pid > 0) {
1345                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1346                                         r = -errno;
1347                                 else
1348                                         sent = true;
1349                         }
1350
1351                         if (s->control_pid > 0) {
1352                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1353                                         r = -errno;
1354                                 else
1355                                         sent = true;
1356                         }
1357
1358                         if (r < 0)
1359                                 goto fail;
1360                 }
1361         }
1362
1363         if (sent && (s->main_pid > 0 || s->control_pid > 0)) {
1364                 if (s->timeout_usec > 0)
1365                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1366                                 goto fail;
1367
1368                 service_set_state(s, state);
1369         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1370                 service_enter_stop_post(s, true);
1371         else
1372                 service_enter_dead(s, true, true);
1373
1374         return;
1375
1376 fail:
1377         log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1378
1379         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1380                 service_enter_stop_post(s, false);
1381         else
1382                 service_enter_dead(s, false, true);
1383 }
1384
1385 static void service_enter_stop(Service *s, bool success) {
1386         int r;
1387         assert(s);
1388
1389         if (!success)
1390                 s->failure = true;
1391
1392         service_unwatch_control_pid(s);
1393
1394         s->control_command_id = SERVICE_EXEC_STOP;
1395         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1396                 if ((r = service_spawn(s,
1397                                        s->control_command,
1398                                        true,
1399                                        false,
1400                                        !s->permissions_start_only,
1401                                        !s->root_directory_start_only,
1402                                        &s->control_pid)) < 0)
1403                         goto fail;
1404
1405                 service_set_state(s, SERVICE_STOP);
1406         } else
1407                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1408
1409         return;
1410
1411 fail:
1412         log_warning("%s failed to run stop executable: %s", UNIT(s)->meta.id, strerror(-r));
1413         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1414 }
1415
1416 static void service_enter_running(Service *s, bool success) {
1417         assert(s);
1418
1419         if (!success)
1420                 s->failure = true;
1421
1422         if (main_pid_good(s) != 0 &&
1423             cgroup_good(s) != 0 &&
1424             (s->bus_name_good || s->type != SERVICE_DBUS))
1425                 service_set_state(s, SERVICE_RUNNING);
1426         else if (s->valid_no_process)
1427                 service_set_state(s, SERVICE_EXITED);
1428         else
1429                 service_enter_stop(s, true);
1430 }
1431
1432 static void service_enter_start_post(Service *s) {
1433         int r;
1434         assert(s);
1435
1436         service_unwatch_control_pid(s);
1437
1438         s->control_command_id = SERVICE_EXEC_START_POST;
1439         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1440                 if ((r = service_spawn(s,
1441                                        s->control_command,
1442                                        true,
1443                                        false,
1444                                        !s->permissions_start_only,
1445                                        !s->root_directory_start_only,
1446                                        &s->control_pid)) < 0)
1447                         goto fail;
1448
1449
1450                 service_set_state(s, SERVICE_START_POST);
1451         } else
1452                 service_enter_running(s, true);
1453
1454         return;
1455
1456 fail:
1457         log_warning("%s failed to run start-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1458         service_enter_stop(s, false);
1459 }
1460
1461 static void service_enter_start(Service *s) {
1462         pid_t pid;
1463         int r;
1464
1465         assert(s);
1466
1467         assert(s->exec_command[SERVICE_EXEC_START]);
1468         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1469
1470         if (s->type == SERVICE_FORKING)
1471                 service_unwatch_control_pid(s);
1472         else
1473                 service_unwatch_main_pid(s);
1474
1475         if ((r = service_spawn(s,
1476                                s->exec_command[SERVICE_EXEC_START],
1477                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS,
1478                                true,
1479                                true,
1480                                true,
1481                                &pid)) < 0)
1482                 goto fail;
1483
1484         if (s->type == SERVICE_SIMPLE) {
1485                 /* For simple services we immediately start
1486                  * the START_POST binaries. */
1487
1488                 s->main_pid = pid;
1489                 s->main_pid_known = true;
1490
1491                 service_enter_start_post(s);
1492
1493         } else  if (s->type == SERVICE_FORKING) {
1494
1495                 /* For forking services we wait until the start
1496                  * process exited. */
1497
1498                 s->control_pid = pid;
1499
1500                 s->control_command_id = SERVICE_EXEC_START;
1501                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1502                 service_set_state(s, SERVICE_START);
1503
1504         } else if (s->type == SERVICE_FINISH ||
1505                    s->type == SERVICE_DBUS) {
1506
1507                 /* For finishing services we wait until the start
1508                  * process exited, too, but it is our main process. */
1509
1510                 /* For D-Bus services we know the main pid right away,
1511                  * but wait for the bus name to appear on the bus. */
1512
1513                 s->main_pid = pid;
1514                 s->main_pid_known = true;
1515
1516                 service_set_state(s, SERVICE_START);
1517         } else
1518                 assert_not_reached("Unknown service type");
1519
1520         return;
1521
1522 fail:
1523         log_warning("%s failed to run start exectuable: %s", UNIT(s)->meta.id, strerror(-r));
1524         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1525 }
1526
1527 static void service_enter_start_pre(Service *s) {
1528         int r;
1529
1530         assert(s);
1531
1532         service_unwatch_control_pid(s);
1533
1534         s->control_command_id = SERVICE_EXEC_START_PRE;
1535         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1536                 if ((r = service_spawn(s,
1537                                        s->control_command,
1538                                        true,
1539                                        false,
1540                                        !s->permissions_start_only,
1541                                        !s->root_directory_start_only,
1542                                        &s->control_pid)) < 0)
1543                         goto fail;
1544
1545                 service_set_state(s, SERVICE_START_PRE);
1546         } else
1547                 service_enter_start(s);
1548
1549         return;
1550
1551 fail:
1552         log_warning("%s failed to run start-pre executable: %s", UNIT(s)->meta.id, strerror(-r));
1553         service_enter_dead(s, false, true);
1554 }
1555
1556 static void service_enter_restart(Service *s) {
1557         int r;
1558         assert(s);
1559
1560         service_enter_dead(s, true, false);
1561
1562         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1563                 goto fail;
1564
1565         log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1566         return;
1567
1568 fail:
1569
1570         log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1571         service_enter_dead(s, false, false);
1572 }
1573
1574 static void service_enter_reload(Service *s) {
1575         int r;
1576
1577         assert(s);
1578
1579         service_unwatch_control_pid(s);
1580
1581         s->control_command_id = SERVICE_EXEC_RELOAD;
1582         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1583                 if ((r = service_spawn(s,
1584                                        s->control_command,
1585                                        true,
1586                                        false,
1587                                        !s->permissions_start_only,
1588                                        !s->root_directory_start_only,
1589                                        &s->control_pid)) < 0)
1590                         goto fail;
1591
1592                 service_set_state(s, SERVICE_RELOAD);
1593         } else
1594                 service_enter_running(s, true);
1595
1596         return;
1597
1598 fail:
1599         log_warning("%s failed to run reload executable: %s", UNIT(s)->meta.id, strerror(-r));
1600         service_enter_stop(s, false);
1601 }
1602
1603 static void service_run_next(Service *s, bool success) {
1604         int r;
1605
1606         assert(s);
1607         assert(s->control_command);
1608         assert(s->control_command->command_next);
1609
1610         if (!success)
1611                 s->failure = true;
1612
1613         s->control_command = s->control_command->command_next;
1614
1615         service_unwatch_control_pid(s);
1616
1617         if ((r = service_spawn(s,
1618                                s->control_command,
1619                                true,
1620                                false,
1621                                !s->permissions_start_only,
1622                                !s->root_directory_start_only,
1623                                &s->control_pid)) < 0)
1624                 goto fail;
1625
1626         return;
1627
1628 fail:
1629         log_warning("%s failed to run spawn next executable: %s", UNIT(s)->meta.id, strerror(-r));
1630
1631         if (s->state == SERVICE_START_PRE)
1632                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1633         else if (s->state == SERVICE_STOP)
1634                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1635         else if (s->state == SERVICE_STOP_POST)
1636                 service_enter_dead(s, false, true);
1637         else
1638                 service_enter_stop(s, false);
1639 }
1640
1641 static int service_start(Unit *u) {
1642         Service *s = SERVICE(u);
1643
1644         assert(s);
1645
1646         /* We cannot fulfill this request right now, try again later
1647          * please! */
1648         if (s->state == SERVICE_STOP ||
1649             s->state == SERVICE_STOP_SIGTERM ||
1650             s->state == SERVICE_STOP_SIGKILL ||
1651             s->state == SERVICE_STOP_POST ||
1652             s->state == SERVICE_FINAL_SIGTERM ||
1653             s->state == SERVICE_FINAL_SIGKILL)
1654                 return -EAGAIN;
1655
1656         /* Already on it! */
1657         if (s->state == SERVICE_START_PRE ||
1658             s->state == SERVICE_START ||
1659             s->state == SERVICE_START_POST)
1660                 return 0;
1661
1662         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1663
1664         /* Make sure we don't enter a busy loop of some kind. */
1665         if (!ratelimit_test(&s->ratelimit)) {
1666                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1667                 return -EAGAIN;
1668         }
1669
1670         s->failure = false;
1671         s->main_pid_known = false;
1672         s->allow_restart = true;
1673
1674         service_enter_start_pre(s);
1675         return 0;
1676 }
1677
1678 static int service_stop(Unit *u) {
1679         Service *s = SERVICE(u);
1680
1681         assert(s);
1682
1683         /* Cannot do this now */
1684         if (s->state == SERVICE_START_PRE ||
1685             s->state == SERVICE_START ||
1686             s->state == SERVICE_START_POST ||
1687             s->state == SERVICE_RELOAD)
1688                 return -EAGAIN;
1689
1690         /* Already on it */
1691         if (s->state == SERVICE_STOP ||
1692             s->state == SERVICE_STOP_SIGTERM ||
1693             s->state == SERVICE_STOP_SIGKILL ||
1694             s->state == SERVICE_STOP_POST ||
1695             s->state == SERVICE_FINAL_SIGTERM ||
1696             s->state == SERVICE_FINAL_SIGKILL)
1697                 return 0;
1698
1699         if (s->state == SERVICE_AUTO_RESTART) {
1700                 service_set_state(s, SERVICE_DEAD);
1701                 return 0;
1702         }
1703
1704         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1705
1706         /* This is a user request, so don't do restarts on this
1707          * shutdown. */
1708         s->allow_restart = false;
1709
1710         service_enter_stop(s, true);
1711         return 0;
1712 }
1713
1714 static int service_reload(Unit *u) {
1715         Service *s = SERVICE(u);
1716
1717         assert(s);
1718
1719         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1720
1721         service_enter_reload(s);
1722         return 0;
1723 }
1724
1725 static bool service_can_reload(Unit *u) {
1726         Service *s = SERVICE(u);
1727
1728         assert(s);
1729
1730         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1731 }
1732
1733 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1734         Service *s = SERVICE(u);
1735
1736         assert(u);
1737         assert(f);
1738         assert(fds);
1739
1740         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1741         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1742
1743         if (s->control_pid > 0)
1744                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) (s->control_pid));
1745
1746         if (s->main_pid > 0)
1747                 unit_serialize_item_format(u, f, "main-pid", "%u", (unsigned) (s->main_pid));
1748
1749         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1750
1751         /* There's a minor uncleanliness here: if there are multiple
1752          * commands attached here, we will start from the first one
1753          * again */
1754         if (s->control_command_id >= 0)
1755                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
1756
1757         if (s->socket_fd >= 0) {
1758                 int copy;
1759
1760                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1761                         return copy;
1762
1763                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1764         }
1765
1766         return 0;
1767 }
1768
1769 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1770         Service *s = SERVICE(u);
1771         int r;
1772
1773         assert(u);
1774         assert(key);
1775         assert(value);
1776         assert(fds);
1777
1778         if (streq(key, "state")) {
1779                 ServiceState state;
1780
1781                 if ((state = service_state_from_string(value)) < 0)
1782                         log_debug("Failed to parse state value %s", value);
1783                 else
1784                         s->deserialized_state = state;
1785         } else if (streq(key, "failure")) {
1786                 int b;
1787
1788                 if ((b = parse_boolean(value)) < 0)
1789                         log_debug("Failed to parse failure value %s", value);
1790                 else
1791                         s->failure = b || s->failure;
1792         } else if (streq(key, "control-pid")) {
1793                 unsigned pid;
1794
1795                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1796                         log_debug("Failed to parse control-pid value %s", value);
1797                 else
1798                         s->control_pid = (pid_t) pid;
1799         } else if (streq(key, "main-pid")) {
1800                 unsigned pid;
1801
1802                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1803                         log_debug("Failed to parse main-pid value %s", value);
1804                 else
1805                         s->main_pid = (pid_t) pid;
1806         } else if (streq(key, "main-pid-known")) {
1807                 int b;
1808
1809                 if ((b = parse_boolean(value)) < 0)
1810                         log_debug("Failed to parse main-pid-known value %s", value);
1811                 else
1812                         s->main_pid_known = b;
1813         } else if (streq(key, "control-command")) {
1814                 ServiceExecCommand id;
1815
1816                 if ((id = service_exec_command_from_string(value)) < 0)
1817                         log_debug("Failed to parse exec-command value %s", value);
1818                 else {
1819                         s->control_command_id = id;
1820                         s->control_command = s->exec_command[id];
1821                 }
1822         } else if (streq(key, "socket-fd")) {
1823                 int fd;
1824
1825                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1826                         log_debug("Failed to parse socket-fd value %s", value);
1827                 else {
1828
1829                         if (s->socket_fd >= 0)
1830                                 close_nointr_nofail(s->socket_fd);
1831                         s->socket_fd = fdset_remove(fds, fd);
1832                 }
1833         } else
1834                 log_debug("Unknown serialization key '%s'", key);
1835
1836         return 0;
1837 }
1838
1839 static UnitActiveState service_active_state(Unit *u) {
1840         assert(u);
1841
1842         return state_translation_table[SERVICE(u)->state];
1843 }
1844
1845 static const char *service_sub_state_to_string(Unit *u) {
1846         assert(u);
1847
1848         return service_state_to_string(SERVICE(u)->state);
1849 }
1850
1851 static bool service_check_gc(Unit *u) {
1852         Service *s = SERVICE(u);
1853
1854         assert(s);
1855
1856         return !!s->sysv_path;
1857 }
1858
1859 static bool service_check_snapshot(Unit *u) {
1860         Service *s = SERVICE(u);
1861
1862         assert(s);
1863
1864         return !s->got_socket_fd;
1865 }
1866
1867 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1868         Service *s = SERVICE(u);
1869         bool success;
1870
1871         assert(s);
1872         assert(pid >= 0);
1873
1874         success = code == CLD_EXITED && status == 0;
1875         s->failure = s->failure || !success;
1876
1877         if (s->main_pid == pid) {
1878
1879                 exec_status_fill(&s->main_exec_status, pid, code, status);
1880                 s->main_pid = 0;
1881
1882                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1883                         assert(s->exec_command[SERVICE_EXEC_START]);
1884                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1885                 }
1886
1887                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
1888
1889                 /* The service exited, so the service is officially
1890                  * gone. */
1891
1892                 switch (s->state) {
1893
1894                 case SERVICE_START_POST:
1895                 case SERVICE_RELOAD:
1896                 case SERVICE_STOP:
1897                         /* Need to wait until the operation is
1898                          * done */
1899                         break;
1900
1901                 case SERVICE_START:
1902                         assert(s->type == SERVICE_FINISH);
1903
1904                         /* This was our main goal, so let's go on */
1905                         if (success)
1906                                 service_enter_start_post(s);
1907                         else
1908                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1909                         break;
1910
1911                 case SERVICE_RUNNING:
1912                         service_enter_running(s, success);
1913                         break;
1914
1915                 case SERVICE_STOP_SIGTERM:
1916                 case SERVICE_STOP_SIGKILL:
1917
1918                         if (!control_pid_good(s))
1919                                 service_enter_stop_post(s, success);
1920
1921                         /* If there is still a control process, wait for that first */
1922                         break;
1923
1924                 default:
1925                         assert_not_reached("Uh, main process died at wrong time.");
1926                 }
1927
1928         } else if (s->control_pid == pid) {
1929
1930                 if (s->control_command)
1931                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
1932
1933                 s->control_pid = 0;
1934
1935                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1936
1937                 /* If we are shutting things down anyway we
1938                  * don't care about failing commands. */
1939
1940                 if (s->control_command && s->control_command->command_next && success) {
1941
1942                         /* There is another command to *
1943                          * execute, so let's do that. */
1944
1945                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
1946                         service_run_next(s, success);
1947
1948                 } else {
1949                         /* No further commands for this step, so let's
1950                          * figure out what to do next */
1951
1952                         s->control_command = NULL;
1953                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1954
1955                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
1956
1957                         switch (s->state) {
1958
1959                         case SERVICE_START_PRE:
1960                                 if (success)
1961                                         service_enter_start(s);
1962                                 else
1963                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1964                                 break;
1965
1966                         case SERVICE_START:
1967                                 assert(s->type == SERVICE_FORKING);
1968
1969                                 /* Let's try to load the pid
1970                                  * file here if we can. We
1971                                  * ignore the return value,
1972                                  * since the PID file might
1973                                  * actually be created by a
1974                                  * START_POST script */
1975
1976                                 if (success) {
1977                                         if (s->pid_file)
1978                                                 service_load_pid_file(s);
1979
1980                                         service_enter_start_post(s);
1981                                 } else
1982                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1983
1984                                 break;
1985
1986                         case SERVICE_START_POST:
1987                                 if (success && s->pid_file && !s->main_pid_known) {
1988                                         int r;
1989
1990                                         /* Hmm, let's see if we can
1991                                          * load the pid now after the
1992                                          * start-post scripts got
1993                                          * executed. */
1994
1995                                         if ((r = service_load_pid_file(s)) < 0)
1996                                                 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
1997                                 }
1998
1999                                 /* Fall through */
2000
2001                         case SERVICE_RELOAD:
2002                                 if (success)
2003                                         service_enter_running(s, true);
2004                                 else
2005                                         service_enter_stop(s, false);
2006
2007                                 break;
2008
2009                         case SERVICE_STOP:
2010                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2011                                 break;
2012
2013                         case SERVICE_STOP_SIGTERM:
2014                         case SERVICE_STOP_SIGKILL:
2015                                 if (main_pid_good(s) <= 0)
2016                                         service_enter_stop_post(s, success);
2017
2018                                 /* If there is still a service
2019                                  * process around, wait until
2020                                  * that one quit, too */
2021                                 break;
2022
2023                         case SERVICE_STOP_POST:
2024                         case SERVICE_FINAL_SIGTERM:
2025                         case SERVICE_FINAL_SIGKILL:
2026                                 service_enter_dead(s, success, true);
2027                                 break;
2028
2029                         default:
2030                                 assert_not_reached("Uh, control process died at wrong time.");
2031                         }
2032                 }
2033         } else
2034                 assert_not_reached("Got SIGCHLD for unkown PID");
2035 }
2036
2037 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2038         Service *s = SERVICE(u);
2039
2040         assert(s);
2041         assert(elapsed == 1);
2042
2043         assert(w == &s->timer_watch);
2044
2045         switch (s->state) {
2046
2047         case SERVICE_START_PRE:
2048         case SERVICE_START:
2049                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2050                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2051                 break;
2052
2053         case SERVICE_START_POST:
2054         case SERVICE_RELOAD:
2055                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2056                 service_enter_stop(s, false);
2057                 break;
2058
2059         case SERVICE_STOP:
2060                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2061                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2062                 break;
2063
2064         case SERVICE_STOP_SIGTERM:
2065                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2066                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2067                 break;
2068
2069         case SERVICE_STOP_SIGKILL:
2070                 /* Uh, wie sent a SIGKILL and it is still not gone?
2071                  * Must be something we cannot kill, so let's just be
2072                  * weirded out and continue */
2073
2074                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2075                 service_enter_stop_post(s, false);
2076                 break;
2077
2078         case SERVICE_STOP_POST:
2079                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2080                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2081                 break;
2082
2083         case SERVICE_FINAL_SIGTERM:
2084                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2085                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2086                 break;
2087
2088         case SERVICE_FINAL_SIGKILL:
2089                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
2090                 service_enter_dead(s, false, true);
2091                 break;
2092
2093         case SERVICE_AUTO_RESTART:
2094                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2095                 service_enter_restart(s);
2096                 break;
2097
2098         default:
2099                 assert_not_reached("Timeout at wrong time.");
2100         }
2101 }
2102
2103 static void service_cgroup_notify_event(Unit *u) {
2104         Service *s = SERVICE(u);
2105
2106         assert(u);
2107
2108         log_debug("%s: cgroup is empty", u->meta.id);
2109
2110         switch (s->state) {
2111
2112                 /* Waiting for SIGCHLD is usually more interesting,
2113                  * because it includes return codes/signals. Which is
2114                  * why we ignore the cgroup events for most cases,
2115                  * except when we don't know pid which to expect the
2116                  * SIGCHLD for. */
2117
2118         case SERVICE_RUNNING:
2119                 service_enter_running(s, true);
2120                 break;
2121
2122         default:
2123                 ;
2124         }
2125 }
2126
2127 static int service_enumerate(Manager *m) {
2128         char **p;
2129         unsigned i;
2130         DIR *d = NULL;
2131         char *path = NULL, *fpath = NULL, *name = NULL;
2132         int r;
2133
2134         assert(m);
2135
2136         STRV_FOREACH(p, m->sysvrcnd_path)
2137                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2138                         struct dirent *de;
2139
2140                         free(path);
2141                         path = NULL;
2142                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2143                                 r = -ENOMEM;
2144                                 goto finish;
2145                         }
2146
2147                         if (d)
2148                                 closedir(d);
2149
2150                         if (!(d = opendir(path))) {
2151                                 if (errno != ENOENT)
2152                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2153
2154                                 continue;
2155                         }
2156
2157                         while ((de = readdir(d))) {
2158                                 Unit *service;
2159                                 int a, b;
2160
2161                                 if (ignore_file(de->d_name))
2162                                         continue;
2163
2164                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2165                                         continue;
2166
2167                                 if (strlen(de->d_name) < 4)
2168                                         continue;
2169
2170                                 a = undecchar(de->d_name[1]);
2171                                 b = undecchar(de->d_name[2]);
2172
2173                                 if (a < 0 || b < 0)
2174                                         continue;
2175
2176                                 free(fpath);
2177                                 fpath = NULL;
2178                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2179                                         r = -ENOMEM;
2180                                         goto finish;
2181                                 }
2182
2183                                 if (access(fpath, X_OK) < 0) {
2184
2185                                         if (errno != ENOENT)
2186                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2187
2188                                         continue;
2189                                 }
2190
2191                                 free(name);
2192                                 name = NULL;
2193                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
2194                                         r = -ENOMEM;
2195                                         goto finish;
2196                                 }
2197
2198                                 if ((r = manager_load_unit_prepare(m, name, NULL, &service)) < 0)
2199                                         goto finish;
2200
2201                                 if (de->d_name[0] == 'S' &&
2202                                     (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_BASIC))
2203                                         SERVICE(service)->sysv_start_priority = a*10 + b;
2204
2205                                 manager_dispatch_load_queue(m);
2206                                 service = unit_follow_merge(service);
2207
2208                                 if (de->d_name[0] == 'S') {
2209                                         Unit *runlevel_target;
2210
2211                                         if ((r = manager_load_unit(m, rcnd_table[i].target, NULL, &runlevel_target)) < 0)
2212                                                 goto finish;
2213
2214                                         if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2215                                                 goto finish;
2216
2217                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, runlevel_target, true)) < 0)
2218                                                 goto finish;
2219
2220                                 } else if (de->d_name[0] == 'K' && rcnd_table[i].type == RUNLEVEL_DOWN) {
2221                                         Unit *shutdown_target;
2222
2223                                         /* We honour K links only for
2224                                          * halt/reboot. For the normal
2225                                          * runlevels we assume the
2226                                          * stop jobs will be
2227                                          * implicitly added by the
2228                                          * core logic. Also, we don't
2229                                          * really distuingish here
2230                                          * between the runlevels 0 and
2231                                          * 6 and just add them to the
2232                                          * special shutdown target. */
2233
2234                                         if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2235                                                 goto finish;
2236
2237                                         if ((r = unit_add_dependency(service, UNIT_CONFLICTS, shutdown_target, true)) < 0)
2238                                                 goto finish;
2239
2240                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, shutdown_target, true)) < 0)
2241                                                 goto finish;
2242                                 }
2243                         }
2244                 }
2245
2246         r = 0;
2247
2248 finish:
2249         free(path);
2250         free(fpath);
2251         free(name);
2252         closedir(d);
2253
2254         return r;
2255 }
2256
2257 static void service_bus_name_owner_change(
2258                 Unit *u,
2259                 const char *name,
2260                 const char *old_owner,
2261                 const char *new_owner) {
2262
2263         Service *s = SERVICE(u);
2264
2265         assert(s);
2266         assert(name);
2267
2268         assert(streq(s->bus_name, name));
2269         assert(old_owner || new_owner);
2270
2271         if (old_owner && new_owner)
2272                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2273         else if (old_owner)
2274                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2275         else
2276                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2277
2278         s->bus_name_good = !!new_owner;
2279
2280         if (s->type == SERVICE_DBUS) {
2281
2282                 /* service_enter_running() will figure out what to
2283                  * do */
2284                 if (s->state == SERVICE_RUNNING)
2285                         service_enter_running(s, true);
2286                 else if (s->state == SERVICE_START && new_owner)
2287                         service_enter_start_post(s);
2288
2289         } else if (new_owner &&
2290                    s->main_pid <= 0 &&
2291                    (s->state == SERVICE_START ||
2292                     s->state == SERVICE_START_POST ||
2293                     s->state == SERVICE_RUNNING ||
2294                     s->state == SERVICE_RELOAD)) {
2295
2296                 /* Try to acquire PID from bus service */
2297                 log_debug("Trying to acquire PID from D-Bus name...");
2298
2299                 bus_query_pid(u->meta.manager, name);
2300         }
2301 }
2302
2303 static void service_bus_query_pid_done(
2304                 Unit *u,
2305                 const char *name,
2306                 pid_t pid) {
2307
2308         Service *s = SERVICE(u);
2309
2310         assert(s);
2311         assert(name);
2312
2313         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2314
2315         if (s->main_pid <= 0 &&
2316             (s->state == SERVICE_START ||
2317              s->state == SERVICE_START_POST ||
2318              s->state == SERVICE_RUNNING ||
2319              s->state == SERVICE_RELOAD))
2320                 s->main_pid = pid;
2321 }
2322
2323 int service_set_socket_fd(Service *s, int fd) {
2324         assert(s);
2325         assert(fd >= 0);
2326
2327         /* This is called by the socket code when instantiating a new
2328          * service for a stream socket and the socket needs to be
2329          * configured. */
2330
2331         if (UNIT(s)->meta.load_state != UNIT_LOADED)
2332                 return -EINVAL;
2333
2334         if (s->socket_fd >= 0)
2335                 return -EBUSY;
2336
2337         if (s->state != SERVICE_DEAD)
2338                 return -EAGAIN;
2339
2340         s->socket_fd = fd;
2341         s->got_socket_fd = true;
2342         return 0;
2343 }
2344
2345 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2346         [SERVICE_DEAD] = "dead",
2347         [SERVICE_START_PRE] = "start-pre",
2348         [SERVICE_START] = "start",
2349         [SERVICE_START_POST] = "start-post",
2350         [SERVICE_RUNNING] = "running",
2351         [SERVICE_EXITED] = "exited",
2352         [SERVICE_RELOAD] = "reload",
2353         [SERVICE_STOP] = "stop",
2354         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2355         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2356         [SERVICE_STOP_POST] = "stop-post",
2357         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2358         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2359         [SERVICE_MAINTAINANCE] = "maintainance",
2360         [SERVICE_AUTO_RESTART] = "auto-restart",
2361 };
2362
2363 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2364
2365 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2366         [SERVICE_ONCE] = "once",
2367         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2368         [SERVICE_RESTART_ALWAYS] = "restart-always",
2369 };
2370
2371 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2372
2373 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2374         [SERVICE_FORKING] = "forking",
2375         [SERVICE_SIMPLE] = "simple",
2376         [SERVICE_FINISH] = "finish",
2377         [SERVICE_DBUS] = "dbus"
2378 };
2379
2380 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2381
2382 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2383         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2384         [SERVICE_EXEC_START] = "ExecStart",
2385         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2386         [SERVICE_EXEC_RELOAD] = "ExecReload",
2387         [SERVICE_EXEC_STOP] = "ExecStop",
2388         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2389 };
2390
2391 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2392
2393 const UnitVTable service_vtable = {
2394         .suffix = ".service",
2395
2396         .init = service_init,
2397         .done = service_done,
2398         .load = service_load,
2399
2400         .coldplug = service_coldplug,
2401
2402         .dump = service_dump,
2403
2404         .start = service_start,
2405         .stop = service_stop,
2406         .reload = service_reload,
2407
2408         .can_reload = service_can_reload,
2409
2410         .serialize = service_serialize,
2411         .deserialize_item = service_deserialize_item,
2412
2413         .active_state = service_active_state,
2414         .sub_state_to_string = service_sub_state_to_string,
2415
2416         .check_gc = service_check_gc,
2417         .check_snapshot = service_check_snapshot,
2418
2419         .sigchld_event = service_sigchld_event,
2420         .timer_event = service_timer_event,
2421
2422         .cgroup_notify_empty = service_cgroup_notify_event,
2423
2424         .bus_name_owner_change = service_bus_name_owner_change,
2425         .bus_query_pid_done = service_bus_query_pid_done,
2426
2427         .bus_message_handler = bus_service_message_handler,
2428
2429         .enumerate = service_enumerate
2430 };