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
  34 #define COMMENTS "#;\n"
  35 #define NEWLINES "\n\r"
  36 #define LINE_MAX 4096
  37
  38 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  39         [SERVICE_DEAD] = UNIT_INACTIVE,
  40         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  41         [SERVICE_START] = UNIT_ACTIVATING,
  42         [SERVICE_START_POST] = UNIT_ACTIVATING,
  43         [SERVICE_RUNNING] = UNIT_ACTIVE,
  44         [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
  45         [SERVICE_STOP] = UNIT_DEACTIVATING,
  46         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  47         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  48         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  49         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  50         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  51         [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
  52         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
  53 };
  54
  55 static void service_done(Unit *u) {
  56         Service *s = SERVICE(u);
  57
  58         assert(s);
  59
  60         free(s->pid_file);
  61         s->pid_file = NULL;
  62
  63         free(s->sysv_path);
  64         s->sysv_path = NULL;
  65
  66         exec_context_done(&s->exec_context);
  67         exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
  68         s->control_command = NULL;
  69
  70         /* This will leak a process, but at least no memory or any of
  71          * our resources */
  72         if (s->main_pid > 0) {
  73                 unit_unwatch_pid(u, s->main_pid);
  74                 s->main_pid = 0;
  75         }
  76
  77         if (s->control_pid > 0) {
  78                 unit_unwatch_pid(u, s->control_pid);
  79                 s->control_pid = 0;
  80         }
  81
  82         unit_unwatch_timer(u, &s->timer_watch);
  83 }
  84
  85 static int sysv_translate_name(const char *name, char **_r) {
  86
  87         static const char * const table[] = {
  88                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
  89                 "$network",   SPECIAL_NETWORK_TARGET,
  90                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
  91                 "$portmap",   SPECIAL_RPCBIND_TARGET,
  92                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
  93                 "$syslog",    SPECIAL_SYSLOG_TARGET,
  94                 "$time",      SPECIAL_RTC_SET_TARGET
  95         };
  96
  97         unsigned i;
  98         char *r;
  99
 100         for (i = 0; i < ELEMENTSOF(table); i += 2)
 101                 if (streq(table[i], name)) {
 102                         if (!(r = strdup(table[i+1])))
 103                                 return -ENOMEM;
 104
 105                         goto finish;
 106                 }
 107
 108         if (*name == '$')
 109                 return 0;
 110
 111         if (asprintf(&r, "%s.service", name) < 0)
 112                 return -ENOMEM;
 113
 114 finish:
 115
 116         if (_r)
 117                 *_r = r;
 118
 119         return 1;
 120 }
 121
 122 static int sysv_chkconfig_order(Service *s) {
 123         Meta *other;
 124         int r;
 125
 126         assert(s);
 127
 128         if (s->sysv_start_priority < 0)
 129                 return 0;
 130
 131         /* If no LSB header is found we try to order init scripts via
 132          * the start priority of the chkconfig header. */
 133
 134         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 135                 Service *t;
 136                 UnitDependency d;
 137
 138                 t = (Service*) other;
 139
 140                 if (s == t)
 141                         continue;
 142
 143                 if (t->sysv_start_priority < 0)
 144                         continue;
 145
 146                 if (t->sysv_start_priority < s->sysv_start_priority)
 147                         d = UNIT_AFTER;
 148                 else if (t->sysv_start_priority > s->sysv_start_priority)
 149                         d = UNIT_BEFORE;
 150                 else
 151                         continue;
 152
 153                 /* FIXME: Maybe we should compare the name here lexicographically? */
 154
 155                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
 156                         return r;
 157         }
 158
 159         return 0;
 160 }
 161
 162 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 163         ExecCommand *c;
 164
 165         if (!(c = new0(ExecCommand, 1)))
 166                 return NULL;
 167
 168         if (!(c->path = strdup(path))) {
 169                 free(c);
 170                 return NULL;
 171         }
 172
 173         if (!(c->argv = strv_new(path, arg1, NULL))) {
 174                 free(c->path);
 175                 free(c);
 176                 return NULL;
 177         }
 178
 179         return c;
 180 }
 181
 182 static int sysv_exec_commands(Service *s) {
 183         ExecCommand *c;
 184
 185         assert(s);
 186         assert(s->sysv_path);
 187
 188         if (!(c = exec_command_new(s->sysv_path, "start")))
 189                 return -ENOMEM;
 190         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 191
 192         if (!(c = exec_command_new(s->sysv_path, "stop")))
 193                 return -ENOMEM;
 194         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 195
 196         if (!(c = exec_command_new(s->sysv_path, "reload")))
 197                 return -ENOMEM;
 198         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 199
 200         return 0;
 201 }
 202
 203 static int service_load_sysv_path(Service *s, const char *path) {
 204         FILE *f;
 205         Unit *u;
 206         unsigned line = 0;
 207         int r;
 208         enum {
 209                 NORMAL,
 210                 DESCRIPTION,
 211                 LSB,
 212                 LSB_DESCRIPTION
 213         } state = NORMAL;
 214         bool has_lsb = false;
 215
 216         u = UNIT(s);
 217
 218         if (!(f = fopen(path, "re"))) {
 219                 r = errno == ENOENT ? 0 : -errno;
 220                 goto finish;
 221         }
 222
 223         s->type = SERVICE_FORKING;
 224         s->restart = SERVICE_ONCE;
 225
 226         free(s->sysv_path);
 227         if (!(s->sysv_path = strdup(path))) {
 228                 r = -ENOMEM;
 229                 goto finish;
 230         }
 231
 232         while (!feof(f)) {
 233                 char l[LINE_MAX], *t;
 234
 235                 if (!fgets(l, sizeof(l), f)) {
 236                         if (feof(f))
 237                                 break;
 238
 239                         r = -errno;
 240                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 241                         goto finish;
 242                 }
 243
 244                 line++;
 245
 246                 t = strstrip(l);
 247                 if (*t != '#')
 248                         continue;
 249
 250                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 251                         state = LSB;
 252                         has_lsb = true;
 253                         continue;
 254                 }
 255
 256                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 257                         state = NORMAL;
 258                         continue;
 259                 }
 260
 261                 t++;
 262                 t += strspn(t, WHITESPACE);
 263
 264                 if (state == NORMAL) {
 265
 266                         /* Try to parse Red Hat style chkconfig headers */
 267
 268                         if (startswith(t, "chkconfig:")) {
 269                                 int start_priority;
 270
 271                                 state = NORMAL;
 272
 273                                 if (sscanf(t+10, "%*15s %i %*i",
 274                                            &start_priority) != 1) {
 275
 276                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 277                                         continue;
 278                                 }
 279
 280                                 if (start_priority < 0 || start_priority > 99) {
 281                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 282                                         continue;
 283                                 }
 284
 285                                 s->sysv_start_priority = start_priority;
 286
 287                         } else if (startswith(t, "description:")) {
 288
 289                                 size_t k = strlen(t);
 290                                 char *d;
 291
 292                                 if (t[k-1] == '\\') {
 293                                         state = DESCRIPTION;
 294                                         t[k-1] = 0;
 295                                 }
 296
 297                                 if (!(d = strdup(strstrip(t+12)))) {
 298                                         r = -ENOMEM;
 299                                         goto finish;
 300                                 }
 301
 302                                 free(u->meta.description);
 303                                 u->meta.description = d;
 304
 305                         } else if (startswith(t, "pidfile:")) {
 306
 307                                 char *fn;
 308
 309                                 state = NORMAL;
 310
 311                                 fn = strstrip(t+8);
 312                                 if (!path_is_absolute(fn)) {
 313                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 314                                         continue;
 315                                 }
 316
 317                                 if (!(fn = strdup(fn))) {
 318                                         r = -ENOMEM;
 319                                         goto finish;
 320                                 }
 321
 322                                 free(s->pid_file);
 323                                 s->pid_file = fn;
 324                         }
 325
 326                 } else if (state == DESCRIPTION) {
 327
 328                         /* Try to parse Red Hat style description
 329                          * continuation */
 330
 331                         size_t k = strlen(t);
 332                         char *d;
 333
 334                         if (t[k-1] == '\\')
 335                                 t[k-1] = 0;
 336                         else
 337                                 state = NORMAL;
 338
 339                         assert(u->meta.description);
 340                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 341                                 r = -ENOMEM;
 342                                 goto finish;
 343                         }
 344
 345                         free(u->meta.description);
 346                         u->meta.description = d;
 347
 348                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 349
 350                         if (startswith(t, "Provides:")) {
 351                                 char *i, *w;
 352                                 size_t z;
 353
 354                                 state = LSB;
 355
 356                                 FOREACH_WORD(w, z, t+9, i) {
 357                                         char *n, *m;
 358
 359                                         if (!(n = strndup(w, z))) {
 360                                                 r = -ENOMEM;
 361                                                 goto finish;
 362                                         }
 363
 364                                         r = sysv_translate_name(n, &m);
 365                                         free(n);
 366
 367                                         if (r < 0)
 368                                                 goto finish;
 369
 370                                         if (r == 0)
 371                                                 continue;
 372
 373                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 374                                                 r = unit_add_name(u, m);
 375                                         else {
 376                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
 377                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
 378                                         }
 379
 380                                         free(m);
 381
 382                                         if (r < 0)
 383                                                 goto finish;
 384                                 }
 385
 386                         } else if (startswith(t, "Required-Start:") ||
 387                                    startswith(t, "Should-Start:")) {
 388                                 char *i, *w;
 389                                 size_t z;
 390
 391                                 state = LSB;
 392
 393                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 394                                         char *n, *m;
 395
 396                                         if (!(n = strndup(w, z))) {
 397                                                 r = -ENOMEM;
 398                                                 goto finish;
 399                                         }
 400
 401                                         r = sysv_translate_name(n, &m);
 402                                         free(n);
 403
 404                                         if (r < 0)
 405                                                 goto finish;
 406
 407                                         if (r == 0)
 408                                                 continue;
 409
 410                                         if (!(r = unit_add_dependency_by_name(u, UNIT_AFTER, m)) < 0) {
 411                                                 free(m);
 412                                                 goto finish;
 413                                         }
 414
 415                                         r = unit_add_dependency_by_name(
 416                                                         u,
 417                                                         startswith(t, "Required-Start:") ? UNIT_REQUIRES : UNIT_WANTS,
 418                                                         m);
 419                                         free(m);
 420
 421                                         if (r < 0)
 422                                                 goto finish;
 423                                 }
 424
 425                         } else if (startswith(t, "Description:")) {
 426                                 char *d;
 427
 428                                 state = LSB_DESCRIPTION;
 429
 430                                 if (!(d = strdup(strstrip(t+12)))) {
 431                                         r = -ENOMEM;
 432                                         goto finish;
 433                                 }
 434
 435                                 free(u->meta.description);
 436                                 u->meta.description = d;
 437
 438                         } else if (startswith(t, "Short-Description:") && !u->meta.description) {
 439                                 char *d;
 440
 441                                 /* We use the short description only
 442                                  * if no long description is set. */
 443
 444                                 state = LSB;
 445
 446                                 if (!(d = strdup(strstrip(t+18)))) {
 447                                         r = -ENOMEM;
 448                                         goto finish;
 449                                 }
 450
 451                                 free(u->meta.description);
 452                                 u->meta.description = d;
 453
 454                         } else if (state == LSB_DESCRIPTION) {
 455
 456                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 457                                         char *d;
 458
 459                                         assert(u->meta.description);
 460                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 461                                                 r = -ENOMEM;
 462                                                 goto finish;
 463                                         }
 464
 465                                         free(u->meta.description);
 466                                         u->meta.description = d;
 467                                 } else
 468                                         state = LSB;
 469                         }
 470                 }
 471         }
 472
 473         /* If the init script has no LSB header, then let's
 474          * enforce the ordering via the chkconfig
 475          * priorities */
 476
 477         if (!has_lsb)
 478                 if ((r = sysv_chkconfig_order(s)) < 0)
 479                         goto finish;
 480
 481         if ((r = sysv_exec_commands(s)) < 0)
 482                 goto finish;
 483
 484         r = 1;
 485
 486 finish:
 487
 488         if (f)
 489                 fclose(f);
 490
 491         return r;
 492 }
 493
 494 static int service_load_sysv_name(Service *s, const char *name) {
 495         char **p;
 496
 497         assert(s);
 498         assert(name);
 499
 500         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 501                 char *path;
 502                 int r;
 503
 504                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 505                         return -ENOMEM;
 506
 507                 assert(endswith(path, ".service"));
 508                 path[strlen(path)-8] = 0;
 509
 510                 r = service_load_sysv_path(s, path);
 511                 free(path);
 512
 513                 if (r >= 0)
 514                         return r;
 515         }
 516
 517         return 0;
 518 }
 519
 520 static int service_load_sysv(Service *s) {
 521         const char *t;
 522         Iterator i;
 523         int r;
 524
 525         assert(s);
 526
 527         /* Load service data from SysV init scripts, preferably with
 528          * LSB headers ... */
 529
 530         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 531                 return 0;
 532
 533         if ((t = unit_id(UNIT(s))))
 534                 if ((r = service_load_sysv_name(s, t)) != 0)
 535                         return r;
 536
 537         SET_FOREACH(t, UNIT(s)->meta.names, i)
 538                 if ((r == service_load_sysv_name(s, t)) != 0)
 539                         return r;
 540
 541         return 0;
 542 }
 543
 544 static int service_init(Unit *u) {
 545         int r;
 546         Service *s = SERVICE(u);
 547
 548         assert(s);
 549
 550         /* First, reset everything to the defaults, in case this is a
 551          * reload */
 552
 553         s->type = 0;
 554         s->restart = 0;
 555
 556         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 557         s->restart_usec = DEFAULT_RESTART_USEC;
 558
 559         exec_context_init(&s->exec_context);
 560
 561         s->timer_watch.type = WATCH_INVALID;
 562
 563         s->state = SERVICE_DEAD;
 564
 565         s->sysv_start_priority = -1;
 566         s->permissions_start_only = false;
 567         s->root_directory_start_only = false;
 568
 569         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 570
 571         /* Load a .service file */
 572         if ((r = unit_load_fragment(u)) < 0) {
 573                 service_done(u);
 574                 return r;
 575         }
 576
 577         /* Load a classic init script as a fallback, if we couldn't find anything */
 578         if (r == 0)
 579                 if ((r = service_load_sysv(s)) <= 0) {
 580                         service_done(u);
 581                         return r < 0 ? r : -ENOENT;
 582                 }
 583
 584         /* Load dropin directory data */
 585         if ((r = unit_load_dropin(u)) < 0) {
 586                 service_done(u);
 587                 return r;
 588         }
 589
 590         /* Add default cgroup */
 591         if ((r = unit_add_default_cgroup(u)) < 0) {
 592                 service_done(u);
 593                 return r;
 594         }
 595
 596         return 0;
 597 }
 598
 599 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 600
 601         ServiceExecCommand c;
 602         Service *s = SERVICE(u);
 603         const char *prefix2;
 604         char *p2;
 605
 606         assert(s);
 607
 608         p2 = strappend(prefix, "\t");
 609         prefix2 = p2 ? p2 : prefix;
 610
 611         fprintf(f,
 612                 "%sService State: %s\n"
 613                 "%sPermissionsStartOnly: %s\n"
 614                 "%sRootDirectoryStartOnly: %s\n"
 615                 "%sValidNoProcess: %s\n",
 616                 prefix, service_state_to_string(s->state),
 617                 prefix, yes_no(s->permissions_start_only),
 618                 prefix, yes_no(s->root_directory_start_only),
 619                 prefix, yes_no(s->valid_no_process));
 620
 621         if (s->pid_file)
 622                 fprintf(f,
 623                         "%sPIDFile: %s\n",
 624                         prefix, s->pid_file);
 625
 626
 627         exec_context_dump(&s->exec_context, f, prefix);
 628
 629         for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
 630
 631                 if (!s->exec_command[c])
 632                         continue;
 633
 634                 fprintf(f, "%s→ %s:\n",
 635                         prefix, service_exec_command_to_string(c));
 636
 637                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 638         }
 639
 640         if (s->sysv_path)
 641                 fprintf(f,
 642                         "%sSysV Init Script Path: %s\n",
 643                         prefix, s->sysv_path);
 644
 645         if (s->sysv_start_priority >= 0)
 646                 fprintf(f,
 647                         "%sSysV Start Priority: %i\n",
 648                         prefix, s->sysv_start_priority);
 649
 650         free(p2);
 651 }
 652
 653 static int service_load_pid_file(Service *s) {
 654         char *k;
 655         unsigned long p;
 656         int r;
 657
 658         assert(s);
 659
 660         if (s->main_pid_known)
 661                 return 0;
 662
 663         if (!s->pid_file)
 664                 return -ENOENT;
 665
 666         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 667                 return r;
 668
 669         if ((r = safe_atolu(k, &p)) < 0) {
 670                 free(k);
 671                 return r;
 672         }
 673
 674         if ((unsigned long) (pid_t) p != p)
 675                 return -ERANGE;
 676
 677         s->main_pid = p;
 678         s->main_pid_known = true;
 679
 680         return 0;
 681 }
 682
 683 static int service_get_sockets(Service *s, Set **_set) {
 684         Set *set;
 685         Iterator i;
 686         char *t;
 687         int r;
 688
 689         assert(s);
 690         assert(_set);
 691
 692         /* Collects all Socket objects that belong to this
 693          * service. Note that a service might have multiple sockets
 694          * via multiple names. */
 695
 696         if (!(set = set_new(NULL, NULL)))
 697                 return -ENOMEM;
 698
 699         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 700                 char *k;
 701                 Unit *p;
 702
 703                 /* Look for all socket objects that go by any of our
 704                  * units and collect their fds */
 705
 706                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 707                         r = -ENOMEM;
 708                         goto fail;
 709                 }
 710
 711                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 712                 free(k);
 713
 714                 if (!p) continue;
 715
 716                 if ((r = set_put(set, p)) < 0)
 717                         goto fail;
 718         }
 719
 720         *_set = set;
 721         return 0;
 722
 723 fail:
 724         set_free(set);
 725         return r;
 726 }
 727
 728
 729 static int service_notify_sockets(Service *s) {
 730         Iterator i;
 731         Set *set;
 732         Socket *sock;
 733         int r;
 734
 735         assert(s);
 736
 737         /* Notifies all our sockets when we die */
 738
 739         if ((r = service_get_sockets(s, &set)) < 0)
 740                 return r;
 741
 742         SET_FOREACH(sock, set, i)
 743                 socket_notify_service_dead(sock);
 744
 745         set_free(set);
 746
 747         return 0;
 748 }
 749
 750 static void service_set_state(Service *s, ServiceState state) {
 751         ServiceState old_state;
 752         assert(s);
 753
 754         old_state = s->state;
 755         s->state = state;
 756
 757         if (state != SERVICE_START_PRE &&
 758             state != SERVICE_START &&
 759             state != SERVICE_START_POST &&
 760             state != SERVICE_RELOAD &&
 761             state != SERVICE_STOP &&
 762             state != SERVICE_STOP_SIGTERM &&
 763             state != SERVICE_STOP_SIGKILL &&
 764             state != SERVICE_STOP_POST &&
 765             state != SERVICE_FINAL_SIGTERM &&
 766             state != SERVICE_FINAL_SIGKILL &&
 767             state != SERVICE_AUTO_RESTART)
 768                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 769
 770         if (state != SERVICE_START &&
 771             state != SERVICE_START_POST &&
 772             state != SERVICE_RUNNING &&
 773             state != SERVICE_RELOAD &&
 774             state != SERVICE_STOP &&
 775             state != SERVICE_STOP_SIGTERM &&
 776             state != SERVICE_STOP_SIGKILL)
 777                 if (s->main_pid > 0) {
 778                         unit_unwatch_pid(UNIT(s), s->main_pid);
 779                         s->main_pid = 0;
 780                 }
 781
 782         if (state != SERVICE_START_PRE &&
 783             state != SERVICE_START &&
 784             state != SERVICE_START_POST &&
 785             state != SERVICE_RELOAD &&
 786             state != SERVICE_STOP &&
 787             state != SERVICE_STOP_SIGTERM &&
 788             state != SERVICE_STOP_SIGKILL &&
 789             state != SERVICE_STOP_POST &&
 790             state != SERVICE_FINAL_SIGTERM &&
 791             state != SERVICE_FINAL_SIGKILL)
 792                 if (s->control_pid > 0) {
 793                         unit_unwatch_pid(UNIT(s), s->control_pid);
 794                         s->control_pid = 0;
 795                 }
 796
 797         if (state != SERVICE_START_PRE &&
 798             state != SERVICE_START &&
 799             state != SERVICE_START_POST &&
 800             state != SERVICE_RELOAD &&
 801             state != SERVICE_STOP &&
 802             state != SERVICE_STOP_POST)
 803                 s->control_command = NULL;
 804
 805         if (state == SERVICE_DEAD ||
 806             state == SERVICE_STOP ||
 807             state == SERVICE_STOP_SIGTERM ||
 808             state == SERVICE_STOP_SIGKILL ||
 809             state == SERVICE_STOP_POST ||
 810             state == SERVICE_FINAL_SIGTERM ||
 811             state == SERVICE_FINAL_SIGKILL ||
 812             state == SERVICE_MAINTAINANCE ||
 813             state == SERVICE_AUTO_RESTART)
 814                 service_notify_sockets(s);
 815
 816         log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 817
 818         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 819 }
 820
 821 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
 822         Iterator i;
 823         int r;
 824         int *rfds = NULL;
 825         unsigned rn_fds = 0;
 826         Set *set;
 827         Socket *sock;
 828
 829         assert(s);
 830         assert(fds);
 831         assert(n_fds);
 832
 833         if ((r = service_get_sockets(s, &set)) < 0)
 834                 return r;
 835
 836         SET_FOREACH(sock, set, i) {
 837                 int *cfds;
 838                 unsigned cn_fds;
 839
 840                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
 841                         goto fail;
 842
 843                 if (!cfds)
 844                         continue;
 845
 846                 if (!rfds) {
 847                         rfds = cfds;
 848                         rn_fds = cn_fds;
 849                 } else {
 850                         int *t;
 851
 852                         if (!(t = new(int, rn_fds+cn_fds))) {
 853                                 free(cfds);
 854                                 r = -ENOMEM;
 855                                 goto fail;
 856                         }
 857
 858                         memcpy(t, rfds, rn_fds);
 859                         memcpy(t+rn_fds, cfds, cn_fds);
 860                         free(rfds);
 861                         free(cfds);
 862
 863                         rfds = t;
 864                         rn_fds = rn_fds+cn_fds;
 865                 }
 866         }
 867
 868         *fds = rfds;
 869         *n_fds = rn_fds;
 870
 871         set_free(set);
 872
 873         return 0;
 874
 875 fail:
 876         set_free(set);
 877         free(rfds);
 878
 879         return r;
 880 }
 881
 882 static int service_spawn(
 883                 Service *s,
 884                 ExecCommand *c,
 885                 bool timeout,
 886                 bool pass_fds,
 887                 bool apply_permissions,
 888                 bool apply_chroot,
 889                 pid_t *_pid) {
 890
 891         pid_t pid;
 892         int r;
 893         int *fds = NULL;
 894         unsigned n_fds = 0;
 895
 896         assert(s);
 897         assert(c);
 898         assert(_pid);
 899
 900         if (pass_fds)
 901                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
 902                         goto fail;
 903
 904         if (timeout) {
 905                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
 906                         goto fail;
 907         } else
 908                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 909
 910         if ((r = exec_spawn(c,
 911                             &s->exec_context,
 912                             fds, n_fds,
 913                             apply_permissions,
 914                             apply_chroot,
 915                             UNIT(s)->meta.cgroup_bondings,
 916                             &pid)) < 0)
 917                 goto fail;
 918
 919         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 920                 /* FIXME: we need to do something here */
 921                 goto fail;
 922
 923         free(fds);
 924         *_pid = pid;
 925
 926         return 0;
 927
 928 fail:
 929         free(fds);
 930
 931         if (timeout)
 932                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 933
 934         return r;
 935 }
 936
 937 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
 938         int r;
 939         assert(s);
 940
 941         if (!success)
 942                 s->failure = true;
 943
 944         if (allow_restart &&
 945             (s->restart == SERVICE_RESTART_ALWAYS ||
 946              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
 947
 948                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
 949                         goto fail;
 950
 951                 service_set_state(s, SERVICE_AUTO_RESTART);
 952         } else
 953                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
 954
 955         return;
 956
 957 fail:
 958         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
 959         service_enter_dead(s, false, false);
 960 }
 961
 962 static void service_enter_signal(Service *s, ServiceState state, bool success);
 963
 964 static void service_enter_stop_post(Service *s, bool success) {
 965         int r;
 966         assert(s);
 967
 968         if (!success)
 969                 s->failure = true;
 970
 971         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
 972                 if ((r = service_spawn(s,
 973                                        s->control_command,
 974                                        true,
 975                                        false,
 976                                        !s->permissions_start_only,
 977                                        !s->root_directory_start_only,
 978                                        &s->control_pid)) < 0)
 979                         goto fail;
 980
 981
 982         service_set_state(s, SERVICE_STOP_POST);
 983
 984         if (!s->control_command)
 985                 service_enter_dead(s, true, true);
 986
 987         return;
 988
 989 fail:
 990         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
 991         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
 992 }
 993
 994 static void service_enter_signal(Service *s, ServiceState state, bool success) {
 995         int r;
 996         bool sent = false;
 997
 998         assert(s);
 999
1000         if (!success)
1001                 s->failure = true;
1002
1003         if (s->main_pid > 0 || s->control_pid > 0) {
1004                 int sig;
1005
1006                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1007
1008                 r = 0;
1009                 if (s->main_pid > 0) {
1010                         if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
1011                                 r = -errno;
1012                         else
1013                                 sent = true;
1014                 }
1015
1016                 if (s->control_pid > 0) {
1017                         if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
1018                                 r = -errno;
1019                         else
1020                                 sent = true;
1021                 }
1022
1023                 if (r < 0)
1024                         goto fail;
1025         }
1026
1027         service_set_state(s, state);
1028
1029         if (s->main_pid <= 0 && s->control_pid <= 0)
1030                 service_enter_dead(s, true, true);
1031
1032         return;
1033
1034 fail:
1035         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1036
1037         if (sent)  {
1038                 s->failure = true;
1039                 service_set_state(s, state);
1040         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1041                 service_enter_stop_post(s, false);
1042         else
1043                 service_enter_dead(s, false, true);
1044 }
1045
1046 static void service_enter_stop(Service *s, bool success) {
1047         int r;
1048         assert(s);
1049
1050         if (!success)
1051                 s->failure = true;
1052
1053         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1054                 if ((r = service_spawn(s,
1055                                        s->control_command,
1056                                        true,
1057                                        false,
1058                                        !s->permissions_start_only,
1059                                        !s->root_directory_start_only,
1060                                        &s->control_pid)) < 0)
1061                         goto fail;
1062
1063         service_set_state(s, SERVICE_STOP);
1064
1065         if (!s->control_command)
1066                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1067
1068         return;
1069
1070 fail:
1071         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1072         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1073 }
1074
1075 static void service_enter_start_post(Service *s) {
1076         int r;
1077         assert(s);
1078
1079         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1080                 if ((r = service_spawn(s,
1081                                        s->control_command,
1082                                        true,
1083                                        false,
1084                                        !s->permissions_start_only,
1085                                        !s->root_directory_start_only,
1086                                        &s->control_pid)) < 0)
1087                         goto fail;
1088
1089
1090         service_set_state(s, SERVICE_START_POST);
1091
1092         if (!s->control_command)
1093                 service_set_state(s, SERVICE_RUNNING);
1094
1095         return;
1096
1097 fail:
1098         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1099         service_enter_stop(s, false);
1100 }
1101
1102 static void service_enter_start(Service *s) {
1103         pid_t pid;
1104         int r;
1105
1106         assert(s);
1107
1108         assert(s->exec_command[SERVICE_EXEC_START]);
1109         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1110
1111         if ((r = service_spawn(s,
1112                                s->exec_command[SERVICE_EXEC_START],
1113                                s->type == SERVICE_FORKING,
1114                                true,
1115                                true,
1116                                true,
1117                                &pid)) < 0)
1118                 goto fail;
1119
1120         service_set_state(s, SERVICE_START);
1121
1122         if (s->type == SERVICE_SIMPLE) {
1123                 /* For simple services we immediately start
1124                  * the START_POST binaries. */
1125
1126                 s->main_pid = pid;
1127                 s->main_pid_known = true;
1128                 service_enter_start_post(s);
1129
1130         } else  if (s->type == SERVICE_FORKING) {
1131
1132                 /* For forking services we wait until the start
1133                  * process exited. */
1134
1135                 s->control_pid = pid;
1136                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1137         } else if (s->type == SERVICE_FINISH) {
1138
1139                 /* For finishing services we wait until the start
1140                  * process exited, too, but it is our main process. */
1141
1142                 s->main_pid = pid;
1143                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1144         } else
1145                 assert_not_reached("Unknown service type");
1146
1147         return;
1148
1149 fail:
1150         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1151         service_enter_stop(s, false);
1152 }
1153
1154 static void service_enter_start_pre(Service *s) {
1155         int r;
1156
1157         assert(s);
1158
1159         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1160                 if ((r = service_spawn(s,
1161                                        s->control_command,
1162                                        true,
1163                                        false,
1164                                        !s->permissions_start_only,
1165                                        !s->root_directory_start_only,
1166                                        &s->control_pid)) < 0)
1167                         goto fail;
1168
1169         service_set_state(s, SERVICE_START_PRE);
1170
1171         if (!s->control_command)
1172                 service_enter_start(s);
1173
1174         return;
1175
1176 fail:
1177         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1178         service_enter_dead(s, false, true);
1179 }
1180
1181 static void service_enter_restart(Service *s) {
1182         int r;
1183         assert(s);
1184
1185         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1186                 goto fail;
1187
1188         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1189         service_enter_dead(s, true, false);
1190         return;
1191
1192 fail:
1193
1194         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1195         service_enter_dead(s, false, false);
1196 }
1197
1198 static void service_enter_reload(Service *s) {
1199         int r;
1200
1201         assert(s);
1202
1203         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1204                 if ((r = service_spawn(s,
1205                                        s->control_command,
1206                                        true,
1207                                        false,
1208                                        !s->permissions_start_only,
1209                                        !s->root_directory_start_only,
1210                                        &s->control_pid)) < 0)
1211                         goto fail;
1212
1213         service_set_state(s, SERVICE_RELOAD);
1214
1215         if (!s->control_command)
1216                 service_set_state(s, SERVICE_RUNNING);
1217
1218         return;
1219
1220 fail:
1221         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1222         service_enter_stop(s, false);
1223 }
1224
1225 static void service_run_next(Service *s, bool success) {
1226         int r;
1227
1228         assert(s);
1229         assert(s->control_command);
1230         assert(s->control_command->command_next);
1231
1232         if (!success)
1233                 s->failure = true;
1234
1235         s->control_command = s->control_command->command_next;
1236
1237         if ((r = service_spawn(s,
1238                                s->control_command,
1239                                true,
1240                                false,
1241                                !s->permissions_start_only,
1242                                !s->root_directory_start_only,
1243                                &s->control_pid)) < 0)
1244                 goto fail;
1245
1246         return;
1247
1248 fail:
1249         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1250
1251         if (s->state == SERVICE_STOP)
1252                 service_enter_stop_post(s, false);
1253         else if (s->state == SERVICE_STOP_POST)
1254                 service_enter_dead(s, false, true);
1255         else
1256                 service_enter_stop(s, false);
1257 }
1258
1259 static int service_start(Unit *u) {
1260         Service *s = SERVICE(u);
1261
1262         assert(s);
1263
1264         /* We cannot fulfill this request right now, try again later
1265          * please! */
1266         if (s->state == SERVICE_STOP ||
1267             s->state == SERVICE_STOP_SIGTERM ||
1268             s->state == SERVICE_STOP_SIGKILL ||
1269             s->state == SERVICE_STOP_POST ||
1270             s->state == SERVICE_FINAL_SIGTERM ||
1271             s->state == SERVICE_FINAL_SIGKILL)
1272                 return -EAGAIN;
1273
1274         /* Already on it! */
1275         if (s->state == SERVICE_START_PRE ||
1276             s->state == SERVICE_START ||
1277             s->state == SERVICE_START_POST)
1278                 return 0;
1279
1280         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1281
1282         /* Make sure we don't enter a busy loop of some kind. */
1283         if (!ratelimit_test(&s->ratelimit)) {
1284                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1285                 return -EAGAIN;
1286         }
1287
1288         s->failure = false;
1289         s->main_pid_known = false;
1290
1291         service_enter_start_pre(s);
1292         return 0;
1293 }
1294
1295 static int service_stop(Unit *u) {
1296         Service *s = SERVICE(u);
1297
1298         assert(s);
1299
1300         if (s->state == SERVICE_START_PRE ||
1301             s->state == SERVICE_START ||
1302             s->state == SERVICE_START_POST ||
1303             s->state == SERVICE_RELOAD)
1304                 return -EAGAIN;
1305
1306         if (s->state == SERVICE_AUTO_RESTART) {
1307                 service_set_state(s, SERVICE_DEAD);
1308                 return 0;
1309         }
1310
1311         assert(s->state == SERVICE_RUNNING);
1312
1313         service_enter_stop(s, true);
1314         return 0;
1315 }
1316
1317 static int service_reload(Unit *u) {
1318         Service *s = SERVICE(u);
1319
1320         assert(s);
1321
1322         assert(s->state == SERVICE_RUNNING);
1323
1324         service_enter_reload(s);
1325         return 0;
1326 }
1327
1328 static bool service_can_reload(Unit *u) {
1329         Service *s = SERVICE(u);
1330
1331         assert(s);
1332
1333         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1334 }
1335
1336 static UnitActiveState service_active_state(Unit *u) {
1337         assert(u);
1338
1339         return state_translation_table[SERVICE(u)->state];
1340 }
1341
1342 static int main_pid_good(Service *s) {
1343         assert(s);
1344
1345         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1346          * don't know */
1347
1348         /* If we know the pid file, then lets just check if it is
1349          * still valid */
1350         if (s->main_pid_known)
1351                 return s->main_pid > 0;
1352
1353         /* We don't know the pid */
1354         return -EAGAIN;
1355 }
1356
1357 static bool control_pid_good(Service *s) {
1358         assert(s);
1359
1360         return s->control_pid > 0;
1361 }
1362
1363 static int cgroup_good(Service *s) {
1364         assert(s);
1365
1366         if (s->valid_no_process)
1367                 return -EAGAIN;
1368
1369         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1370 }
1371
1372 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1373         Service *s = SERVICE(u);
1374         bool success;
1375
1376         assert(s);
1377         assert(pid >= 0);
1378
1379         success = code == CLD_EXITED && status == 0;
1380         s->failure = s->failure || !success;
1381
1382         if (s->main_pid == pid) {
1383
1384                 exec_status_fill(&s->main_exec_status, pid, code, status);
1385                 s->main_pid = 0;
1386
1387                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1388                         assert(s->exec_command[SERVICE_EXEC_START]);
1389                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1390                 }
1391
1392                 log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1393
1394                 /* The service exited, so the service is officially
1395                  * gone. */
1396
1397                 switch (s->state) {
1398
1399                 case SERVICE_START_POST:
1400                 case SERVICE_RELOAD:
1401                 case SERVICE_STOP:
1402                         /* Need to wait until the operation is
1403                          * done */
1404                         break;
1405
1406                 case SERVICE_START:
1407                         assert(s->type == SERVICE_FINISH);
1408
1409                         /* This was our main goal, so let's go on */
1410                         if (success)
1411                                 service_enter_start_post(s);
1412                         else
1413                                 service_enter_stop(s, false);
1414                         break;
1415
1416                 case SERVICE_RUNNING:
1417                         service_enter_stop(s, success);
1418                         break;
1419
1420                 case SERVICE_STOP_SIGTERM:
1421                 case SERVICE_STOP_SIGKILL:
1422
1423                         if (!control_pid_good(s))
1424                                 service_enter_stop_post(s, success);
1425
1426                         /* If there is still a control process, wait for that first */
1427                         break;
1428
1429                 default:
1430                         assert_not_reached("Uh, main process died at wrong time.");
1431                 }
1432
1433         } else if (s->control_pid == pid) {
1434                 assert(s->control_command);
1435
1436                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1437                 s->control_pid = 0;
1438
1439                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1440
1441                 /* If we are shutting things down anyway we
1442                  * don't care about failing commands. */
1443
1444                 if (s->control_command->command_next &&
1445                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1446
1447                         /* There is another command to *
1448                          * execute, so let's do that. */
1449
1450                         service_run_next(s, success);
1451
1452                 else {
1453                         /* No further commands for this step, so let's
1454                          * figure out what to do next */
1455
1456                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1457
1458                         switch (s->state) {
1459
1460                         case SERVICE_START_PRE:
1461                                 if (success)
1462                                         service_enter_start(s);
1463                                 else
1464                                         service_enter_stop(s, false);
1465                                 break;
1466
1467                         case SERVICE_START:
1468                                 assert(s->type == SERVICE_FORKING);
1469
1470                                 /* Let's try to load the pid
1471                                  * file here if we can. We
1472                                  * ignore the return value,
1473                                  * since the PID file might
1474                                  * actually be created by a
1475                                  * START_POST script */
1476
1477                                 if (success) {
1478                                         if (s->pid_file)
1479                                                 service_load_pid_file(s);
1480
1481                                         service_enter_start_post(s);
1482                                 } else
1483                                         service_enter_stop(s, false);
1484
1485                                 break;
1486
1487                         case SERVICE_START_POST:
1488                                 if (success && s->pid_file && !s->main_pid_known) {
1489                                         int r;
1490
1491                                         /* Hmm, let's see if we can
1492                                          * load the pid now after the
1493                                          * start-post scripts got
1494                                          * executed. */
1495
1496                                         if ((r = service_load_pid_file(s)) < 0)
1497                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1498                                 }
1499
1500                                 /* Fall through */
1501
1502                         case SERVICE_RELOAD:
1503                                 if (success) {
1504                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1505                                                 service_set_state(s, SERVICE_RUNNING);
1506                                         else
1507                                                 service_enter_stop(s, true);
1508                                 } else
1509                                         service_enter_stop(s, false);
1510
1511                                 break;
1512
1513                         case SERVICE_STOP:
1514                                 if (main_pid_good(s) > 0)
1515                                         /* Still not dead and we know the PID? Let's go hunting. */
1516                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1517                                 else
1518                                         service_enter_stop_post(s, success);
1519                                 break;
1520
1521                         case SERVICE_STOP_SIGTERM:
1522                         case SERVICE_STOP_SIGKILL:
1523                                 if (main_pid_good(s) <= 0)
1524                                         service_enter_stop_post(s, success);
1525
1526                                 /* If there is still a service
1527                                  * process around, wait until
1528                                  * that one quit, too */
1529                                 break;
1530
1531                         case SERVICE_STOP_POST:
1532                         case SERVICE_FINAL_SIGTERM:
1533                         case SERVICE_FINAL_SIGKILL:
1534                                 service_enter_dead(s, success, true);
1535                                 break;
1536
1537                         default:
1538                                 assert_not_reached("Uh, control process died at wrong time.");
1539                         }
1540                 }
1541         } else
1542                 assert_not_reached("Got SIGCHLD for unkown PID");
1543 }
1544
1545 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1546         Service *s = SERVICE(u);
1547
1548         assert(s);
1549         assert(elapsed == 1);
1550
1551         assert(w == &s->timer_watch);
1552
1553         switch (s->state) {
1554
1555         case SERVICE_START_PRE:
1556         case SERVICE_START:
1557         case SERVICE_START_POST:
1558         case SERVICE_RELOAD:
1559                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1560                 service_enter_stop(s, false);
1561                 break;
1562
1563         case SERVICE_STOP:
1564                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1565                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1566                 break;
1567
1568         case SERVICE_STOP_SIGTERM:
1569                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1570                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1571                 break;
1572
1573         case SERVICE_STOP_SIGKILL:
1574                 /* Uh, wie sent a SIGKILL and it is still not gone?
1575                  * Must be something we cannot kill, so let's just be
1576                  * weirded out and continue */
1577
1578                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1579                 service_enter_stop_post(s, false);
1580                 break;
1581
1582         case SERVICE_STOP_POST:
1583                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1584                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1585                 break;
1586
1587         case SERVICE_FINAL_SIGTERM:
1588                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1589                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1590                 break;
1591
1592         case SERVICE_FINAL_SIGKILL:
1593                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1594                 service_enter_dead(s, false, true);
1595                 break;
1596
1597         case SERVICE_AUTO_RESTART:
1598                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1599                 service_enter_restart(s);
1600                 break;
1601
1602         default:
1603                 assert_not_reached("Timeout at wrong time.");
1604         }
1605 }
1606
1607 static void service_cgroup_notify_event(Unit *u) {
1608         Service *s = SERVICE(u);
1609
1610         assert(u);
1611
1612         log_debug("%s: cgroup is empty", unit_id(u));
1613
1614         switch (s->state) {
1615
1616                 /* Waiting for SIGCHLD is usually more interesting,
1617                  * because it includes return codes/signals. Which is
1618                  * why we ignore the cgroup events for most cases,
1619                  * except when we don't know pid which to expect the
1620                  * SIGCHLD for. */
1621
1622         case SERVICE_RUNNING:
1623
1624                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1625                         service_enter_stop(s, true);
1626
1627                 break;
1628
1629         default:
1630                 ;
1631         }
1632 }
1633
1634 static int service_enumerate(Manager *m) {
1635
1636         static const char * const rcnd[] = {
1637                 "../rc0.d", SPECIAL_RUNLEVEL0_TARGET,
1638                 "../rc1.d", SPECIAL_RUNLEVEL1_TARGET,
1639                 "../rc2.d", SPECIAL_RUNLEVEL2_TARGET,
1640                 "../rc3.d", SPECIAL_RUNLEVEL3_TARGET,
1641                 "../rc4.d", SPECIAL_RUNLEVEL4_TARGET,
1642                 "../rc5.d", SPECIAL_RUNLEVEL5_TARGET,
1643                 "../rc6.d", SPECIAL_RUNLEVEL6_TARGET
1644         };
1645
1646         char **p;
1647         unsigned i;
1648         DIR *d = NULL;
1649         char *path = NULL, *fpath = NULL, *name = NULL;
1650         int r;
1651
1652         assert(m);
1653
1654         STRV_FOREACH(p, m->sysvinit_path)
1655                 for (i = 0; i < ELEMENTSOF(rcnd); i += 2) {
1656                         struct dirent *de;
1657
1658                         free(path);
1659                         path = NULL;
1660                         if (asprintf(&path, "%s/%s", *p, rcnd[i]) < 0) {
1661                                 r = -ENOMEM;
1662                                 goto finish;
1663                         }
1664
1665                         if (d)
1666                                 closedir(d);
1667
1668                         if (!(d = opendir(path))) {
1669                                 if (errno != ENOENT)
1670                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1671
1672                                 continue;
1673                         }
1674
1675                         while ((de = readdir(d))) {
1676                                 Unit *runlevel, *service;
1677
1678                                 if (ignore_file(de->d_name))
1679                                         continue;
1680
1681                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1682                                         continue;
1683
1684                                 if (strlen(de->d_name) < 4)
1685                                         continue;
1686
1687                                 free(fpath);
1688                                 fpath = NULL;
1689                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd[i], de->d_name) < 0) {
1690                                         r = -ENOMEM;
1691                                         goto finish;
1692                                 }
1693
1694                                 if (access(fpath, X_OK) < 0) {
1695
1696                                         if (errno != ENOENT)
1697                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1698
1699                                         continue;
1700                                 }
1701
1702                                 free(name);
1703                                 name = NULL;
1704                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1705                                         r = -ENOMEM;
1706                                         goto finish;
1707                                 }
1708
1709                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1710                                         goto finish;
1711
1712                                 if ((r = manager_load_unit(m, rcnd[i+1], &runlevel)) < 0)
1713                                         goto finish;
1714
1715                                 if (de->d_name[0] == 'S') {
1716                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1717                                                 goto finish;
1718
1719                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1720                                                 goto finish;
1721                                 } else {
1722                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1723                                                 goto finish;
1724
1725                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1726                                                 goto finish;
1727                                 }
1728                         }
1729                 }
1730
1731         r = 0;
1732
1733 finish:
1734         free(path);
1735         free(fpath);
1736         free(name);
1737         closedir(d);
1738
1739         return r;
1740 }
1741
1742 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1743         [SERVICE_DEAD] = "dead",
1744         [SERVICE_START_PRE] = "start-pre",
1745         [SERVICE_START] = "start",
1746         [SERVICE_START_POST] = "start-post",
1747         [SERVICE_RUNNING] = "running",
1748         [SERVICE_RELOAD] = "reload",
1749         [SERVICE_STOP] = "stop",
1750         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1751         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1752         [SERVICE_STOP_POST] = "stop-post",
1753         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1754         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1755         [SERVICE_MAINTAINANCE] = "maintainance",
1756         [SERVICE_AUTO_RESTART] = "auto-restart",
1757 };
1758
1759 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1760
1761 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1762         [SERVICE_ONCE] = "once",
1763         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1764         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1765 };
1766
1767 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1768
1769 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1770         [SERVICE_FORKING] = "forking",
1771         [SERVICE_SIMPLE] = "simple",
1772         [SERVICE_FINISH] = "finish"
1773 };
1774
1775 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1776
1777 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1778         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1779         [SERVICE_EXEC_START] = "ExecStart",
1780         [SERVICE_EXEC_START_POST] = "ExecStartPost",
1781         [SERVICE_EXEC_RELOAD] = "ExecReload",
1782         [SERVICE_EXEC_STOP] = "ExecStop",
1783         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1784 };
1785
1786 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1787
1788 const UnitVTable service_vtable = {
1789         .suffix = ".service",
1790
1791         .init = service_init,
1792         .done = service_done,
1793
1794         .dump = service_dump,
1795
1796         .start = service_start,
1797         .stop = service_stop,
1798         .reload = service_reload,
1799
1800         .can_reload = service_can_reload,
1801
1802         .active_state = service_active_state,
1803
1804         .sigchld_event = service_sigchld_event,
1805         .timer_event = service_timer_event,
1806
1807         .cgroup_notify_empty = service_cgroup_notify_event,
1808
1809         .enumerate = service_enumerate
1810 };