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 char * const rcnd_table[] = {
  39         "../rc0.d", SPECIAL_RUNLEVEL0_TARGET,
  40         "../rc1.d", SPECIAL_RUNLEVEL1_TARGET,
  41         "../rc2.d", SPECIAL_RUNLEVEL2_TARGET,
  42         "../rc3.d", SPECIAL_RUNLEVEL3_TARGET,
  43         "../rc4.d", SPECIAL_RUNLEVEL4_TARGET,
  44         "../rc5.d", SPECIAL_RUNLEVEL5_TARGET,
  45         "../rc6.d", SPECIAL_RUNLEVEL6_TARGET
  46 };
  47
  48
  49 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  50         [SERVICE_DEAD] = UNIT_INACTIVE,
  51         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  52         [SERVICE_START] = UNIT_ACTIVATING,
  53         [SERVICE_START_POST] = UNIT_ACTIVATING,
  54         [SERVICE_RUNNING] = UNIT_ACTIVE,
  55         [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
  56         [SERVICE_STOP] = UNIT_DEACTIVATING,
  57         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  58         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  59         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  60         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  61         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  62         [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
  63         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
  64 };
  65
  66 static void service_done(Unit *u) {
  67         Service *s = SERVICE(u);
  68
  69         assert(s);
  70
  71         free(s->pid_file);
  72         s->pid_file = NULL;
  73
  74         free(s->sysv_path);
  75         s->sysv_path = NULL;
  76
  77         exec_context_done(&s->exec_context);
  78         exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
  79         s->control_command = NULL;
  80
  81         /* This will leak a process, but at least no memory or any of
  82          * our resources */
  83         if (s->main_pid > 0) {
  84                 unit_unwatch_pid(u, s->main_pid);
  85                 s->main_pid = 0;
  86         }
  87
  88         if (s->control_pid > 0) {
  89                 unit_unwatch_pid(u, s->control_pid);
  90                 s->control_pid = 0;
  91         }
  92
  93         unit_unwatch_timer(u, &s->timer_watch);
  94 }
  95
  96 static int sysv_translate_name(const char *name, char **_r) {
  97
  98         static const char * const table[] = {
  99                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 100                 "$network",   SPECIAL_NETWORK_TARGET,
 101                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 102                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 103                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 104                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 105                 "$time",      SPECIAL_RTC_SET_TARGET
 106         };
 107
 108         unsigned i;
 109         char *r;
 110
 111         for (i = 0; i < ELEMENTSOF(table); i += 2)
 112                 if (streq(table[i], name)) {
 113                         if (!(r = strdup(table[i+1])))
 114                                 return -ENOMEM;
 115
 116                         goto finish;
 117                 }
 118
 119         if (*name == '$')
 120                 return 0;
 121
 122         if (asprintf(&r, "%s.service", name) < 0)
 123                 return -ENOMEM;
 124
 125 finish:
 126
 127         if (_r)
 128                 *_r = r;
 129
 130         return 1;
 131 }
 132
 133 static int sysv_chkconfig_order(Service *s) {
 134         Meta *other;
 135         int r;
 136
 137         assert(s);
 138
 139         if (s->sysv_start_priority < 0)
 140                 return 0;
 141
 142         /* For each pair of services where at least one lacks a LSB
 143          * header, we use the start priority value to order things. */
 144
 145         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 146                 Service *t;
 147                 UnitDependency d;
 148
 149                 t = (Service*) other;
 150
 151                 if (s == t)
 152                         continue;
 153
 154                 if (t->sysv_start_priority < 0)
 155                         continue;
 156
 157                 if (s->sysv_has_lsb && t->sysv_has_lsb)
 158                         continue;
 159
 160                 if (t->sysv_start_priority < s->sysv_start_priority)
 161                         d = UNIT_AFTER;
 162                 else if (t->sysv_start_priority > s->sysv_start_priority)
 163                         d = UNIT_BEFORE;
 164                 else
 165                         continue;
 166
 167                 /* FIXME: Maybe we should compare the name here lexicographically? */
 168
 169                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
 170                         return r;
 171         }
 172
 173         return 0;
 174 }
 175
 176 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 177         ExecCommand *c;
 178
 179         if (!(c = new0(ExecCommand, 1)))
 180                 return NULL;
 181
 182         if (!(c->path = strdup(path))) {
 183                 free(c);
 184                 return NULL;
 185         }
 186
 187         if (!(c->argv = strv_new(path, arg1, NULL))) {
 188                 free(c->path);
 189                 free(c);
 190                 return NULL;
 191         }
 192
 193         return c;
 194 }
 195
 196 static int sysv_exec_commands(Service *s) {
 197         ExecCommand *c;
 198
 199         assert(s);
 200         assert(s->sysv_path);
 201
 202         if (!(c = exec_command_new(s->sysv_path, "start")))
 203                 return -ENOMEM;
 204         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 205
 206         if (!(c = exec_command_new(s->sysv_path, "stop")))
 207                 return -ENOMEM;
 208         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 209
 210         if (!(c = exec_command_new(s->sysv_path, "reload")))
 211                 return -ENOMEM;
 212         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 213
 214         return 0;
 215 }
 216
 217 static int priority_from_rcd(Service *s, const char *init_script) {
 218         char **p;
 219         unsigned i;
 220
 221         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path)
 222                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
 223                         char *path;
 224                         DIR *d;
 225                         struct dirent *de;
 226
 227                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
 228                                 return -ENOMEM;
 229
 230                         d = opendir(path);
 231                         free(path);
 232
 233                         if (!d) {
 234                                 if (errno != ENOENT)
 235                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
 236
 237                                 continue;
 238                         }
 239
 240                         while ((de = readdir(d))) {
 241                                 int a, b;
 242
 243                                 if (ignore_file(de->d_name))
 244                                         continue;
 245
 246                                 if (de->d_name[0] != 'S')
 247                                         continue;
 248
 249                                 if (strlen(de->d_name) < 4)
 250                                         continue;
 251
 252                                 if (!streq(de->d_name + 3, init_script))
 253                                         continue;
 254
 255                                 /* Yay, we found it! Now decode the priority */
 256
 257                                 a = undecchar(de->d_name[1]);
 258                                 b = undecchar(de->d_name[2]);
 259
 260                                 if (a < 0 || b < 0)
 261                                         continue;
 262
 263                                 s->sysv_start_priority = a*10 + b;
 264
 265                                 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
 266
 267                                 closedir(d);
 268                                 return 0;
 269                         }
 270
 271                         closedir(d);
 272                 }
 273
 274         return 0;
 275 }
 276
 277 static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) {
 278         FILE *f;
 279         Unit *u;
 280         unsigned line = 0;
 281         int r;
 282         enum {
 283                 NORMAL,
 284                 DESCRIPTION,
 285                 LSB,
 286                 LSB_DESCRIPTION
 287         } state = NORMAL;
 288
 289         assert(s);
 290         assert(path);
 291         assert(new_state);
 292
 293         u = UNIT(s);
 294
 295         if (!(f = fopen(path, "re"))) {
 296                 r = errno == ENOENT ? 0 : -errno;
 297                 goto finish;
 298         }
 299
 300         s->type = SERVICE_FORKING;
 301         s->restart = SERVICE_ONCE;
 302
 303         free(s->sysv_path);
 304         if (!(s->sysv_path = strdup(path))) {
 305                 r = -ENOMEM;
 306                 goto finish;
 307         }
 308
 309         while (!feof(f)) {
 310                 char l[LINE_MAX], *t;
 311
 312                 if (!fgets(l, sizeof(l), f)) {
 313                         if (feof(f))
 314                                 break;
 315
 316                         r = -errno;
 317                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 318                         goto finish;
 319                 }
 320
 321                 line++;
 322
 323                 t = strstrip(l);
 324                 if (*t != '#')
 325                         continue;
 326
 327                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 328                         state = LSB;
 329                         s->sysv_has_lsb = true;
 330                         continue;
 331                 }
 332
 333                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 334                         state = NORMAL;
 335                         continue;
 336                 }
 337
 338                 t++;
 339                 t += strspn(t, WHITESPACE);
 340
 341                 if (state == NORMAL) {
 342
 343                         /* Try to parse Red Hat style chkconfig headers */
 344
 345                         if (startswith(t, "chkconfig:")) {
 346                                 int start_priority;
 347
 348                                 state = NORMAL;
 349
 350                                 if (sscanf(t+10, "%*15s %i %*i",
 351                                            &start_priority) != 1) {
 352
 353                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 354                                         continue;
 355                                 }
 356
 357                                 if (start_priority < 0 || start_priority > 99) {
 358                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 359                                         continue;
 360                                 }
 361
 362                                 s->sysv_start_priority = start_priority;
 363
 364                         } else if (startswith(t, "description:")) {
 365
 366                                 size_t k = strlen(t);
 367                                 char *d;
 368
 369                                 if (t[k-1] == '\\') {
 370                                         state = DESCRIPTION;
 371                                         t[k-1] = 0;
 372                                 }
 373
 374                                 if (!(d = strdup(strstrip(t+12)))) {
 375                                         r = -ENOMEM;
 376                                         goto finish;
 377                                 }
 378
 379                                 free(u->meta.description);
 380                                 u->meta.description = d;
 381
 382                         } else if (startswith(t, "pidfile:")) {
 383
 384                                 char *fn;
 385
 386                                 state = NORMAL;
 387
 388                                 fn = strstrip(t+8);
 389                                 if (!path_is_absolute(fn)) {
 390                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 391                                         continue;
 392                                 }
 393
 394                                 if (!(fn = strdup(fn))) {
 395                                         r = -ENOMEM;
 396                                         goto finish;
 397                                 }
 398
 399                                 free(s->pid_file);
 400                                 s->pid_file = fn;
 401                         }
 402
 403                 } else if (state == DESCRIPTION) {
 404
 405                         /* Try to parse Red Hat style description
 406                          * continuation */
 407
 408                         size_t k = strlen(t);
 409                         char *d;
 410
 411                         if (t[k-1] == '\\')
 412                                 t[k-1] = 0;
 413                         else
 414                                 state = NORMAL;
 415
 416                         assert(u->meta.description);
 417                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 418                                 r = -ENOMEM;
 419                                 goto finish;
 420                         }
 421
 422                         free(u->meta.description);
 423                         u->meta.description = d;
 424
 425                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 426
 427                         if (startswith(t, "Provides:")) {
 428                                 char *i, *w;
 429                                 size_t z;
 430
 431                                 state = LSB;
 432
 433                                 FOREACH_WORD(w, z, t+9, i) {
 434                                         char *n, *m;
 435
 436                                         if (!(n = strndup(w, z))) {
 437                                                 r = -ENOMEM;
 438                                                 goto finish;
 439                                         }
 440
 441                                         r = sysv_translate_name(n, &m);
 442                                         free(n);
 443
 444                                         if (r < 0)
 445                                                 goto finish;
 446
 447                                         if (r == 0)
 448                                                 continue;
 449
 450                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 451                                                 r = unit_add_name(u, m);
 452                                         else {
 453                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
 454                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
 455                                         }
 456
 457                                         free(m);
 458
 459                                         if (r < 0)
 460                                                 goto finish;
 461                                 }
 462
 463                         } else if (startswith(t, "Required-Start:") ||
 464                                    startswith(t, "Should-Start:")) {
 465                                 char *i, *w;
 466                                 size_t z;
 467
 468                                 state = LSB;
 469
 470                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 471                                         char *n, *m;
 472
 473                                         if (!(n = strndup(w, z))) {
 474                                                 r = -ENOMEM;
 475                                                 goto finish;
 476                                         }
 477
 478                                         r = sysv_translate_name(n, &m);
 479                                         free(n);
 480
 481                                         if (r < 0)
 482                                                 goto finish;
 483
 484                                         if (r == 0)
 485                                                 continue;
 486
 487                                         if (!(r = unit_add_dependency_by_name(u, UNIT_AFTER, m)) < 0) {
 488                                                 free(m);
 489                                                 goto finish;
 490                                         }
 491
 492                                         r = unit_add_dependency_by_name(
 493                                                         u,
 494                                                         startswith(t, "Required-Start:") ? UNIT_REQUIRES : UNIT_WANTS,
 495                                                         m);
 496                                         free(m);
 497
 498                                         if (r < 0)
 499                                                 goto finish;
 500                                 }
 501
 502                         } else if (startswith(t, "Description:")) {
 503                                 char *d;
 504
 505                                 state = LSB_DESCRIPTION;
 506
 507                                 if (!(d = strdup(strstrip(t+12)))) {
 508                                         r = -ENOMEM;
 509                                         goto finish;
 510                                 }
 511
 512                                 free(u->meta.description);
 513                                 u->meta.description = d;
 514
 515                         } else if (startswith(t, "Short-Description:") && !u->meta.description) {
 516                                 char *d;
 517
 518                                 /* We use the short description only
 519                                  * if no long description is set. */
 520
 521                                 state = LSB;
 522
 523                                 if (!(d = strdup(strstrip(t+18)))) {
 524                                         r = -ENOMEM;
 525                                         goto finish;
 526                                 }
 527
 528                                 free(u->meta.description);
 529                                 u->meta.description = d;
 530
 531                         } else if (state == LSB_DESCRIPTION) {
 532
 533                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 534                                         char *d;
 535
 536                                         assert(u->meta.description);
 537                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 538                                                 r = -ENOMEM;
 539                                                 goto finish;
 540                                         }
 541
 542                                         free(u->meta.description);
 543                                         u->meta.description = d;
 544                                 } else
 545                                         state = LSB;
 546                         }
 547                 }
 548         }
 549
 550         /* If init scripts have no LSB header, then we enforce the
 551          * ordering via the chkconfig priorities. We try to determine
 552          * a priority for *all* init scripts here, since they are
 553          * needed as soon as at least one non-LSB script is used. */
 554
 555         if (s->sysv_start_priority < 0) {
 556                 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
 557
 558                 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
 559                         goto finish;
 560
 561                 if (s->sysv_start_priority < 0)
 562                         log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
 563         }
 564
 565         if ((r = sysv_exec_commands(s)) < 0)
 566                 goto finish;
 567
 568         if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_SYSINIT_SERVICE)) < 0 ||
 569             (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_SYSINIT_SERVICE)) < 0)
 570                 goto finish;
 571
 572         *new_state = UNIT_LOADED;
 573         r = 0;
 574
 575 finish:
 576
 577         if (f)
 578                 fclose(f);
 579
 580         return r;
 581 }
 582
 583 static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) {
 584         char **p;
 585
 586         assert(s);
 587         assert(name);
 588
 589         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 590                 char *path;
 591                 int r;
 592
 593                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 594                         return -ENOMEM;
 595
 596                 assert(endswith(path, ".service"));
 597                 path[strlen(path)-8] = 0;
 598
 599                 r = service_load_sysv_path(s, path, new_state);
 600                 free(path);
 601
 602                 if (r < 0)
 603                         return r;
 604
 605                 if (*new_state != UNIT_STUB)
 606                         break;
 607         }
 608
 609         return 0;
 610 }
 611
 612 static int service_load_sysv(Service *s, UnitLoadState *new_state) {
 613         const char *t;
 614         Iterator i;
 615         int r;
 616
 617         assert(s);
 618         assert(new_state);
 619
 620         /* Load service data from SysV init scripts, preferably with
 621          * LSB headers ... */
 622
 623         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 624                 return 0;
 625
 626         if ((t = unit_id(UNIT(s))))
 627                 if ((r = service_load_sysv_name(s, t, new_state)) < 0)
 628                         return r;
 629
 630         if (*new_state == UNIT_STUB)
 631                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 632                         if ((r == service_load_sysv_name(s, t, new_state)) < 0)
 633                                 return r;
 634
 635                         if (*new_state != UNIT_STUB)
 636                                 break;
 637                 }
 638
 639         return 0;
 640 }
 641
 642 static int service_init(Unit *u, UnitLoadState *new_state) {
 643         int r;
 644         Service *s = SERVICE(u);
 645
 646         assert(s);
 647         assert(new_state);
 648         assert(*new_state == UNIT_STUB);
 649
 650         /* First, reset everything to the defaults, in case this is a
 651          * reload */
 652
 653         s->type = 0;
 654         s->restart = 0;
 655
 656         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 657         s->restart_usec = DEFAULT_RESTART_USEC;
 658
 659         exec_context_init(&s->exec_context);
 660
 661         s->timer_watch.type = WATCH_INVALID;
 662
 663         s->state = SERVICE_DEAD;
 664
 665         s->sysv_start_priority = -1;
 666         s->permissions_start_only = false;
 667         s->root_directory_start_only = false;
 668
 669         s->sysv_has_lsb = false;
 670
 671         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 672
 673         /* Load a .service file */
 674         if ((r = unit_load_fragment(u, new_state)) < 0)
 675                 return r;
 676
 677         /* Load a classic init script as a fallback, if we couldn't find anything */
 678         if (*new_state == UNIT_STUB)
 679                 if ((r = service_load_sysv(s, new_state)) < 0)
 680                         return r;
 681
 682         /* Still nothing found? Then let's give up */
 683         if (*new_state == UNIT_STUB)
 684                 return -ENOENT;
 685
 686         /* We were able to load something, then let's add in the
 687          * dropin directories. */
 688         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 689                 return r;
 690
 691         /* This is a new unit? Then let's add in some extras */
 692         if (*new_state == UNIT_LOADED) {
 693                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 694                         return r;
 695
 696                 if ((r = unit_add_default_cgroup(u)) < 0)
 697                         return r;
 698
 699                 if ((r = sysv_chkconfig_order(s)) < 0)
 700                         return r;
 701         }
 702
 703         return 0;
 704 }
 705
 706 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 707
 708         ServiceExecCommand c;
 709         Service *s = SERVICE(u);
 710         const char *prefix2;
 711         char *p2;
 712
 713         assert(s);
 714
 715         p2 = strappend(prefix, "\t");
 716         prefix2 = p2 ? p2 : prefix;
 717
 718         fprintf(f,
 719                 "%sService State: %s\n"
 720                 "%sPermissionsStartOnly: %s\n"
 721                 "%sRootDirectoryStartOnly: %s\n"
 722                 "%sValidNoProcess: %s\n"
 723                 "%sType: %s\n",
 724                 prefix, service_state_to_string(s->state),
 725                 prefix, yes_no(s->permissions_start_only),
 726                 prefix, yes_no(s->root_directory_start_only),
 727                 prefix, yes_no(s->valid_no_process),
 728                 prefix, service_type_to_string(s->type));
 729
 730         if (s->pid_file)
 731                 fprintf(f,
 732                         "%sPIDFile: %s\n",
 733                         prefix, s->pid_file);
 734
 735         exec_context_dump(&s->exec_context, f, prefix);
 736
 737         for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
 738
 739                 if (!s->exec_command[c])
 740                         continue;
 741
 742                 fprintf(f, "%s→ %s:\n",
 743                         prefix, service_exec_command_to_string(c));
 744
 745                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 746         }
 747
 748         if (s->sysv_path)
 749                 fprintf(f,
 750                         "%sSysV Init Script Path: %s\n"
 751                         "%sSysV Init Script has LSB Header: %s\n",
 752                         prefix, s->sysv_path,
 753                         prefix, yes_no(s->sysv_has_lsb));
 754
 755         if (s->sysv_start_priority >= 0)
 756                 fprintf(f,
 757                         "%sSysVStartPriority: %i\n",
 758                         prefix, s->sysv_start_priority);
 759
 760
 761         free(p2);
 762 }
 763
 764 static int service_load_pid_file(Service *s) {
 765         char *k;
 766         unsigned long p;
 767         int r;
 768
 769         assert(s);
 770
 771         if (s->main_pid_known)
 772                 return 0;
 773
 774         if (!s->pid_file)
 775                 return -ENOENT;
 776
 777         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 778                 return r;
 779
 780         if ((r = safe_atolu(k, &p)) < 0) {
 781                 free(k);
 782                 return r;
 783         }
 784
 785         if ((unsigned long) (pid_t) p != p)
 786                 return -ERANGE;
 787
 788         s->main_pid = p;
 789         s->main_pid_known = true;
 790
 791         return 0;
 792 }
 793
 794 static int service_get_sockets(Service *s, Set **_set) {
 795         Set *set;
 796         Iterator i;
 797         char *t;
 798         int r;
 799
 800         assert(s);
 801         assert(_set);
 802
 803         /* Collects all Socket objects that belong to this
 804          * service. Note that a service might have multiple sockets
 805          * via multiple names. */
 806
 807         if (!(set = set_new(NULL, NULL)))
 808                 return -ENOMEM;
 809
 810         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 811                 char *k;
 812                 Unit *p;
 813
 814                 /* Look for all socket objects that go by any of our
 815                  * units and collect their fds */
 816
 817                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 818                         r = -ENOMEM;
 819                         goto fail;
 820                 }
 821
 822                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 823                 free(k);
 824
 825                 if (!p) continue;
 826
 827                 if ((r = set_put(set, p)) < 0)
 828                         goto fail;
 829         }
 830
 831         *_set = set;
 832         return 0;
 833
 834 fail:
 835         set_free(set);
 836         return r;
 837 }
 838
 839
 840 static int service_notify_sockets(Service *s) {
 841         Iterator i;
 842         Set *set;
 843         Socket *sock;
 844         int r;
 845
 846         assert(s);
 847
 848         /* Notifies all our sockets when we die */
 849
 850         if ((r = service_get_sockets(s, &set)) < 0)
 851                 return r;
 852
 853         SET_FOREACH(sock, set, i)
 854                 socket_notify_service_dead(sock);
 855
 856         set_free(set);
 857
 858         return 0;
 859 }
 860
 861 static void service_set_state(Service *s, ServiceState state) {
 862         ServiceState old_state;
 863         assert(s);
 864
 865         old_state = s->state;
 866         s->state = state;
 867
 868         if (state != SERVICE_START_PRE &&
 869             state != SERVICE_START &&
 870             state != SERVICE_START_POST &&
 871             state != SERVICE_RELOAD &&
 872             state != SERVICE_STOP &&
 873             state != SERVICE_STOP_SIGTERM &&
 874             state != SERVICE_STOP_SIGKILL &&
 875             state != SERVICE_STOP_POST &&
 876             state != SERVICE_FINAL_SIGTERM &&
 877             state != SERVICE_FINAL_SIGKILL &&
 878             state != SERVICE_AUTO_RESTART)
 879                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 880
 881         if (state != SERVICE_START &&
 882             state != SERVICE_START_POST &&
 883             state != SERVICE_RUNNING &&
 884             state != SERVICE_RELOAD &&
 885             state != SERVICE_STOP &&
 886             state != SERVICE_STOP_SIGTERM &&
 887             state != SERVICE_STOP_SIGKILL)
 888                 if (s->main_pid > 0) {
 889                         unit_unwatch_pid(UNIT(s), s->main_pid);
 890                         s->main_pid = 0;
 891                 }
 892
 893         if (state != SERVICE_START_PRE &&
 894             state != SERVICE_START &&
 895             state != SERVICE_START_POST &&
 896             state != SERVICE_RELOAD &&
 897             state != SERVICE_STOP &&
 898             state != SERVICE_STOP_SIGTERM &&
 899             state != SERVICE_STOP_SIGKILL &&
 900             state != SERVICE_STOP_POST &&
 901             state != SERVICE_FINAL_SIGTERM &&
 902             state != SERVICE_FINAL_SIGKILL)
 903                 if (s->control_pid > 0) {
 904                         unit_unwatch_pid(UNIT(s), s->control_pid);
 905                         s->control_pid = 0;
 906                 }
 907
 908         if (state != SERVICE_START_PRE &&
 909             state != SERVICE_START &&
 910             state != SERVICE_START_POST &&
 911             state != SERVICE_RELOAD &&
 912             state != SERVICE_STOP &&
 913             state != SERVICE_STOP_POST)
 914                 s->control_command = NULL;
 915
 916         if (state == SERVICE_DEAD ||
 917             state == SERVICE_STOP ||
 918             state == SERVICE_STOP_SIGTERM ||
 919             state == SERVICE_STOP_SIGKILL ||
 920             state == SERVICE_STOP_POST ||
 921             state == SERVICE_FINAL_SIGTERM ||
 922             state == SERVICE_FINAL_SIGKILL ||
 923             state == SERVICE_MAINTAINANCE ||
 924             state == SERVICE_AUTO_RESTART)
 925                 service_notify_sockets(s);
 926
 927         log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 928
 929         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 930 }
 931
 932 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
 933         Iterator i;
 934         int r;
 935         int *rfds = NULL;
 936         unsigned rn_fds = 0;
 937         Set *set;
 938         Socket *sock;
 939
 940         assert(s);
 941         assert(fds);
 942         assert(n_fds);
 943
 944         if ((r = service_get_sockets(s, &set)) < 0)
 945                 return r;
 946
 947         SET_FOREACH(sock, set, i) {
 948                 int *cfds;
 949                 unsigned cn_fds;
 950
 951                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
 952                         goto fail;
 953
 954                 if (!cfds)
 955                         continue;
 956
 957                 if (!rfds) {
 958                         rfds = cfds;
 959                         rn_fds = cn_fds;
 960                 } else {
 961                         int *t;
 962
 963                         if (!(t = new(int, rn_fds+cn_fds))) {
 964                                 free(cfds);
 965                                 r = -ENOMEM;
 966                                 goto fail;
 967                         }
 968
 969                         memcpy(t, rfds, rn_fds);
 970                         memcpy(t+rn_fds, cfds, cn_fds);
 971                         free(rfds);
 972                         free(cfds);
 973
 974                         rfds = t;
 975                         rn_fds = rn_fds+cn_fds;
 976                 }
 977         }
 978
 979         *fds = rfds;
 980         *n_fds = rn_fds;
 981
 982         set_free(set);
 983
 984         return 0;
 985
 986 fail:
 987         set_free(set);
 988         free(rfds);
 989
 990         return r;
 991 }
 992
 993 static int service_spawn(
 994                 Service *s,
 995                 ExecCommand *c,
 996                 bool timeout,
 997                 bool pass_fds,
 998                 bool apply_permissions,
 999                 bool apply_chroot,
1000                 pid_t *_pid) {
1001
1002         pid_t pid;
1003         int r;
1004         int *fds = NULL;
1005         unsigned n_fds = 0;
1006
1007         assert(s);
1008         assert(c);
1009         assert(_pid);
1010
1011         if (pass_fds)
1012                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1013                         goto fail;
1014
1015         if (timeout) {
1016                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1017                         goto fail;
1018         } else
1019                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1020
1021         if ((r = exec_spawn(c,
1022                             &s->exec_context,
1023                             fds, n_fds,
1024                             apply_permissions,
1025                             apply_chroot,
1026                             UNIT(s)->meta.cgroup_bondings,
1027                             &pid)) < 0)
1028                 goto fail;
1029
1030         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1031                 /* FIXME: we need to do something here */
1032                 goto fail;
1033
1034         free(fds);
1035         *_pid = pid;
1036
1037         return 0;
1038
1039 fail:
1040         free(fds);
1041
1042         if (timeout)
1043                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1044
1045         return r;
1046 }
1047
1048 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1049         int r;
1050         assert(s);
1051
1052         if (!success)
1053                 s->failure = true;
1054
1055         if (allow_restart &&
1056             (s->restart == SERVICE_RESTART_ALWAYS ||
1057              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1058
1059                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1060                         goto fail;
1061
1062                 service_set_state(s, SERVICE_AUTO_RESTART);
1063         } else
1064                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1065
1066         return;
1067
1068 fail:
1069         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1070         service_enter_dead(s, false, false);
1071 }
1072
1073 static void service_enter_signal(Service *s, ServiceState state, bool success);
1074
1075 static void service_enter_stop_post(Service *s, bool success) {
1076         int r;
1077         assert(s);
1078
1079         if (!success)
1080                 s->failure = true;
1081
1082         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1083                 if ((r = service_spawn(s,
1084                                        s->control_command,
1085                                        true,
1086                                        false,
1087                                        !s->permissions_start_only,
1088                                        !s->root_directory_start_only,
1089                                        &s->control_pid)) < 0)
1090                         goto fail;
1091
1092
1093         service_set_state(s, SERVICE_STOP_POST);
1094
1095         if (!s->control_command)
1096                 service_enter_dead(s, true, true);
1097
1098         return;
1099
1100 fail:
1101         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1102         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1103 }
1104
1105 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1106         int r;
1107         bool sent = false;
1108
1109         assert(s);
1110
1111         if (!success)
1112                 s->failure = true;
1113
1114         if (s->main_pid > 0 || s->control_pid > 0) {
1115                 int sig;
1116
1117                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1118
1119                 r = 0;
1120                 if (s->main_pid > 0) {
1121                         if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
1122                                 r = -errno;
1123                         else
1124                                 sent = true;
1125                 }
1126
1127                 if (s->control_pid > 0) {
1128                         if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
1129                                 r = -errno;
1130                         else
1131                                 sent = true;
1132                 }
1133
1134                 if (r < 0)
1135                         goto fail;
1136         }
1137
1138         service_set_state(s, state);
1139
1140         if (s->main_pid <= 0 && s->control_pid <= 0)
1141                 service_enter_dead(s, true, true);
1142
1143         return;
1144
1145 fail:
1146         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1147
1148         if (sent)  {
1149                 s->failure = true;
1150                 service_set_state(s, state);
1151         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1152                 service_enter_stop_post(s, false);
1153         else
1154                 service_enter_dead(s, false, true);
1155 }
1156
1157 static void service_enter_stop(Service *s, bool success) {
1158         int r;
1159         assert(s);
1160
1161         if (!success)
1162                 s->failure = true;
1163
1164         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1165                 if ((r = service_spawn(s,
1166                                        s->control_command,
1167                                        true,
1168                                        false,
1169                                        !s->permissions_start_only,
1170                                        !s->root_directory_start_only,
1171                                        &s->control_pid)) < 0)
1172                         goto fail;
1173
1174         service_set_state(s, SERVICE_STOP);
1175
1176         if (!s->control_command)
1177                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1178
1179         return;
1180
1181 fail:
1182         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1183         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1184 }
1185
1186 static void service_enter_start_post(Service *s) {
1187         int r;
1188         assert(s);
1189
1190         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1191                 if ((r = service_spawn(s,
1192                                        s->control_command,
1193                                        true,
1194                                        false,
1195                                        !s->permissions_start_only,
1196                                        !s->root_directory_start_only,
1197                                        &s->control_pid)) < 0)
1198                         goto fail;
1199
1200
1201         service_set_state(s, SERVICE_START_POST);
1202
1203         if (!s->control_command)
1204                 service_set_state(s, SERVICE_RUNNING);
1205
1206         return;
1207
1208 fail:
1209         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1210         service_enter_stop(s, false);
1211 }
1212
1213 static void service_enter_start(Service *s) {
1214         pid_t pid;
1215         int r;
1216
1217         assert(s);
1218
1219         assert(s->exec_command[SERVICE_EXEC_START]);
1220         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1221
1222         if ((r = service_spawn(s,
1223                                s->exec_command[SERVICE_EXEC_START],
1224                                s->type == SERVICE_FORKING,
1225                                true,
1226                                true,
1227                                true,
1228                                &pid)) < 0)
1229                 goto fail;
1230
1231         service_set_state(s, SERVICE_START);
1232
1233         if (s->type == SERVICE_SIMPLE) {
1234                 /* For simple services we immediately start
1235                  * the START_POST binaries. */
1236
1237                 s->main_pid = pid;
1238                 s->main_pid_known = true;
1239                 service_enter_start_post(s);
1240
1241         } else  if (s->type == SERVICE_FORKING) {
1242
1243                 /* For forking services we wait until the start
1244                  * process exited. */
1245
1246                 s->control_pid = pid;
1247                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1248         } else if (s->type == SERVICE_FINISH) {
1249
1250                 /* For finishing services we wait until the start
1251                  * process exited, too, but it is our main process. */
1252
1253                 s->main_pid = pid;
1254                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1255         } else
1256                 assert_not_reached("Unknown service type");
1257
1258         return;
1259
1260 fail:
1261         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1262         service_enter_stop(s, false);
1263 }
1264
1265 static void service_enter_start_pre(Service *s) {
1266         int r;
1267
1268         assert(s);
1269
1270         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1271                 if ((r = service_spawn(s,
1272                                        s->control_command,
1273                                        true,
1274                                        false,
1275                                        !s->permissions_start_only,
1276                                        !s->root_directory_start_only,
1277                                        &s->control_pid)) < 0)
1278                         goto fail;
1279
1280         service_set_state(s, SERVICE_START_PRE);
1281
1282         if (!s->control_command)
1283                 service_enter_start(s);
1284
1285         return;
1286
1287 fail:
1288         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1289         service_enter_dead(s, false, true);
1290 }
1291
1292 static void service_enter_restart(Service *s) {
1293         int r;
1294         assert(s);
1295
1296         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1297                 goto fail;
1298
1299         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1300         service_enter_dead(s, true, false);
1301         return;
1302
1303 fail:
1304
1305         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1306         service_enter_dead(s, false, false);
1307 }
1308
1309 static void service_enter_reload(Service *s) {
1310         int r;
1311
1312         assert(s);
1313
1314         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1315                 if ((r = service_spawn(s,
1316                                        s->control_command,
1317                                        true,
1318                                        false,
1319                                        !s->permissions_start_only,
1320                                        !s->root_directory_start_only,
1321                                        &s->control_pid)) < 0)
1322                         goto fail;
1323
1324         service_set_state(s, SERVICE_RELOAD);
1325
1326         if (!s->control_command)
1327                 service_set_state(s, SERVICE_RUNNING);
1328
1329         return;
1330
1331 fail:
1332         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1333         service_enter_stop(s, false);
1334 }
1335
1336 static void service_run_next(Service *s, bool success) {
1337         int r;
1338
1339         assert(s);
1340         assert(s->control_command);
1341         assert(s->control_command->command_next);
1342
1343         if (!success)
1344                 s->failure = true;
1345
1346         s->control_command = s->control_command->command_next;
1347
1348         if ((r = service_spawn(s,
1349                                s->control_command,
1350                                true,
1351                                false,
1352                                !s->permissions_start_only,
1353                                !s->root_directory_start_only,
1354                                &s->control_pid)) < 0)
1355                 goto fail;
1356
1357         return;
1358
1359 fail:
1360         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1361
1362         if (s->state == SERVICE_STOP)
1363                 service_enter_stop_post(s, false);
1364         else if (s->state == SERVICE_STOP_POST)
1365                 service_enter_dead(s, false, true);
1366         else
1367                 service_enter_stop(s, false);
1368 }
1369
1370 static int service_start(Unit *u) {
1371         Service *s = SERVICE(u);
1372
1373         assert(s);
1374
1375         /* We cannot fulfill this request right now, try again later
1376          * please! */
1377         if (s->state == SERVICE_STOP ||
1378             s->state == SERVICE_STOP_SIGTERM ||
1379             s->state == SERVICE_STOP_SIGKILL ||
1380             s->state == SERVICE_STOP_POST ||
1381             s->state == SERVICE_FINAL_SIGTERM ||
1382             s->state == SERVICE_FINAL_SIGKILL)
1383                 return -EAGAIN;
1384
1385         /* Already on it! */
1386         if (s->state == SERVICE_START_PRE ||
1387             s->state == SERVICE_START ||
1388             s->state == SERVICE_START_POST)
1389                 return 0;
1390
1391         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1392
1393         /* Make sure we don't enter a busy loop of some kind. */
1394         if (!ratelimit_test(&s->ratelimit)) {
1395                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1396                 return -EAGAIN;
1397         }
1398
1399         s->failure = false;
1400         s->main_pid_known = false;
1401
1402         service_enter_start_pre(s);
1403         return 0;
1404 }
1405
1406 static int service_stop(Unit *u) {
1407         Service *s = SERVICE(u);
1408
1409         assert(s);
1410
1411         if (s->state == SERVICE_START_PRE ||
1412             s->state == SERVICE_START ||
1413             s->state == SERVICE_START_POST ||
1414             s->state == SERVICE_RELOAD)
1415                 return -EAGAIN;
1416
1417         if (s->state == SERVICE_AUTO_RESTART) {
1418                 service_set_state(s, SERVICE_DEAD);
1419                 return 0;
1420         }
1421
1422         assert(s->state == SERVICE_RUNNING);
1423
1424         service_enter_stop(s, true);
1425         return 0;
1426 }
1427
1428 static int service_reload(Unit *u) {
1429         Service *s = SERVICE(u);
1430
1431         assert(s);
1432
1433         assert(s->state == SERVICE_RUNNING);
1434
1435         service_enter_reload(s);
1436         return 0;
1437 }
1438
1439 static bool service_can_reload(Unit *u) {
1440         Service *s = SERVICE(u);
1441
1442         assert(s);
1443
1444         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1445 }
1446
1447 static UnitActiveState service_active_state(Unit *u) {
1448         assert(u);
1449
1450         return state_translation_table[SERVICE(u)->state];
1451 }
1452
1453 static int main_pid_good(Service *s) {
1454         assert(s);
1455
1456         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1457          * don't know */
1458
1459         /* If we know the pid file, then lets just check if it is
1460          * still valid */
1461         if (s->main_pid_known)
1462                 return s->main_pid > 0;
1463
1464         /* We don't know the pid */
1465         return -EAGAIN;
1466 }
1467
1468 static bool control_pid_good(Service *s) {
1469         assert(s);
1470
1471         return s->control_pid > 0;
1472 }
1473
1474 static int cgroup_good(Service *s) {
1475         assert(s);
1476
1477         if (s->valid_no_process)
1478                 return -EAGAIN;
1479
1480         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1481 }
1482
1483 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1484         Service *s = SERVICE(u);
1485         bool success;
1486
1487         assert(s);
1488         assert(pid >= 0);
1489
1490         success = code == CLD_EXITED && status == 0;
1491         s->failure = s->failure || !success;
1492
1493         if (s->main_pid == pid) {
1494
1495                 exec_status_fill(&s->main_exec_status, pid, code, status);
1496                 s->main_pid = 0;
1497
1498                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1499                         assert(s->exec_command[SERVICE_EXEC_START]);
1500                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1501                 }
1502
1503                 log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1504
1505                 /* The service exited, so the service is officially
1506                  * gone. */
1507
1508                 switch (s->state) {
1509
1510                 case SERVICE_START_POST:
1511                 case SERVICE_RELOAD:
1512                 case SERVICE_STOP:
1513                         /* Need to wait until the operation is
1514                          * done */
1515                         break;
1516
1517                 case SERVICE_START:
1518                         assert(s->type == SERVICE_FINISH);
1519
1520                         /* This was our main goal, so let's go on */
1521                         if (success)
1522                                 service_enter_start_post(s);
1523                         else
1524                                 service_enter_stop(s, false);
1525                         break;
1526
1527                 case SERVICE_RUNNING:
1528                         service_enter_stop(s, success);
1529                         break;
1530
1531                 case SERVICE_STOP_SIGTERM:
1532                 case SERVICE_STOP_SIGKILL:
1533
1534                         if (!control_pid_good(s))
1535                                 service_enter_stop_post(s, success);
1536
1537                         /* If there is still a control process, wait for that first */
1538                         break;
1539
1540                 default:
1541                         assert_not_reached("Uh, main process died at wrong time.");
1542                 }
1543
1544         } else if (s->control_pid == pid) {
1545                 assert(s->control_command);
1546
1547                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1548                 s->control_pid = 0;
1549
1550                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1551
1552                 /* If we are shutting things down anyway we
1553                  * don't care about failing commands. */
1554
1555                 if (s->control_command->command_next &&
1556                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1557
1558                         /* There is another command to *
1559                          * execute, so let's do that. */
1560
1561                         service_run_next(s, success);
1562
1563                 else {
1564                         /* No further commands for this step, so let's
1565                          * figure out what to do next */
1566
1567                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1568
1569                         switch (s->state) {
1570
1571                         case SERVICE_START_PRE:
1572                                 if (success)
1573                                         service_enter_start(s);
1574                                 else
1575                                         service_enter_stop(s, false);
1576                                 break;
1577
1578                         case SERVICE_START:
1579                                 assert(s->type == SERVICE_FORKING);
1580
1581                                 /* Let's try to load the pid
1582                                  * file here if we can. We
1583                                  * ignore the return value,
1584                                  * since the PID file might
1585                                  * actually be created by a
1586                                  * START_POST script */
1587
1588                                 if (success) {
1589                                         if (s->pid_file)
1590                                                 service_load_pid_file(s);
1591
1592                                         service_enter_start_post(s);
1593                                 } else
1594                                         service_enter_stop(s, false);
1595
1596                                 break;
1597
1598                         case SERVICE_START_POST:
1599                                 if (success && s->pid_file && !s->main_pid_known) {
1600                                         int r;
1601
1602                                         /* Hmm, let's see if we can
1603                                          * load the pid now after the
1604                                          * start-post scripts got
1605                                          * executed. */
1606
1607                                         if ((r = service_load_pid_file(s)) < 0)
1608                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1609                                 }
1610
1611                                 /* Fall through */
1612
1613                         case SERVICE_RELOAD:
1614                                 if (success) {
1615                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1616                                                 service_set_state(s, SERVICE_RUNNING);
1617                                         else
1618                                                 service_enter_stop(s, true);
1619                                 } else
1620                                         service_enter_stop(s, false);
1621
1622                                 break;
1623
1624                         case SERVICE_STOP:
1625                                 if (main_pid_good(s) > 0)
1626                                         /* Still not dead and we know the PID? Let's go hunting. */
1627                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1628                                 else
1629                                         service_enter_stop_post(s, success);
1630                                 break;
1631
1632                         case SERVICE_STOP_SIGTERM:
1633                         case SERVICE_STOP_SIGKILL:
1634                                 if (main_pid_good(s) <= 0)
1635                                         service_enter_stop_post(s, success);
1636
1637                                 /* If there is still a service
1638                                  * process around, wait until
1639                                  * that one quit, too */
1640                                 break;
1641
1642                         case SERVICE_STOP_POST:
1643                         case SERVICE_FINAL_SIGTERM:
1644                         case SERVICE_FINAL_SIGKILL:
1645                                 service_enter_dead(s, success, true);
1646                                 break;
1647
1648                         default:
1649                                 assert_not_reached("Uh, control process died at wrong time.");
1650                         }
1651                 }
1652         } else
1653                 assert_not_reached("Got SIGCHLD for unkown PID");
1654 }
1655
1656 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1657         Service *s = SERVICE(u);
1658
1659         assert(s);
1660         assert(elapsed == 1);
1661
1662         assert(w == &s->timer_watch);
1663
1664         switch (s->state) {
1665
1666         case SERVICE_START_PRE:
1667         case SERVICE_START:
1668         case SERVICE_START_POST:
1669         case SERVICE_RELOAD:
1670                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1671                 service_enter_stop(s, false);
1672                 break;
1673
1674         case SERVICE_STOP:
1675                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1676                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1677                 break;
1678
1679         case SERVICE_STOP_SIGTERM:
1680                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1681                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1682                 break;
1683
1684         case SERVICE_STOP_SIGKILL:
1685                 /* Uh, wie sent a SIGKILL and it is still not gone?
1686                  * Must be something we cannot kill, so let's just be
1687                  * weirded out and continue */
1688
1689                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1690                 service_enter_stop_post(s, false);
1691                 break;
1692
1693         case SERVICE_STOP_POST:
1694                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1695                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1696                 break;
1697
1698         case SERVICE_FINAL_SIGTERM:
1699                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1700                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1701                 break;
1702
1703         case SERVICE_FINAL_SIGKILL:
1704                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1705                 service_enter_dead(s, false, true);
1706                 break;
1707
1708         case SERVICE_AUTO_RESTART:
1709                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1710                 service_enter_restart(s);
1711                 break;
1712
1713         default:
1714                 assert_not_reached("Timeout at wrong time.");
1715         }
1716 }
1717
1718 static void service_cgroup_notify_event(Unit *u) {
1719         Service *s = SERVICE(u);
1720
1721         assert(u);
1722
1723         log_debug("%s: cgroup is empty", unit_id(u));
1724
1725         switch (s->state) {
1726
1727                 /* Waiting for SIGCHLD is usually more interesting,
1728                  * because it includes return codes/signals. Which is
1729                  * why we ignore the cgroup events for most cases,
1730                  * except when we don't know pid which to expect the
1731                  * SIGCHLD for. */
1732
1733         case SERVICE_RUNNING:
1734
1735                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1736                         service_enter_stop(s, true);
1737
1738                 break;
1739
1740         default:
1741                 ;
1742         }
1743 }
1744
1745 static int service_enumerate(Manager *m) {
1746         char **p;
1747         unsigned i;
1748         DIR *d = NULL;
1749         char *path = NULL, *fpath = NULL, *name = NULL;
1750         int r;
1751
1752         assert(m);
1753
1754         STRV_FOREACH(p, m->sysvinit_path)
1755                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1756                         struct dirent *de;
1757
1758                         free(path);
1759                         path = NULL;
1760                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1761                                 r = -ENOMEM;
1762                                 goto finish;
1763                         }
1764
1765                         if (d)
1766                                 closedir(d);
1767
1768                         if (!(d = opendir(path))) {
1769                                 if (errno != ENOENT)
1770                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1771
1772                                 continue;
1773                         }
1774
1775                         while ((de = readdir(d))) {
1776                                 Unit *runlevel, *service;
1777
1778                                 if (ignore_file(de->d_name))
1779                                         continue;
1780
1781                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1782                                         continue;
1783
1784                                 if (strlen(de->d_name) < 4)
1785                                         continue;
1786
1787                                 free(fpath);
1788                                 fpath = NULL;
1789                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1790                                         r = -ENOMEM;
1791                                         goto finish;
1792                                 }
1793
1794                                 if (access(fpath, X_OK) < 0) {
1795
1796                                         if (errno != ENOENT)
1797                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1798
1799                                         continue;
1800                                 }
1801
1802                                 free(name);
1803                                 name = NULL;
1804                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1805                                         r = -ENOMEM;
1806                                         goto finish;
1807                                 }
1808
1809                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1810                                         goto finish;
1811
1812                                 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1813                                         goto finish;
1814
1815                                 if (de->d_name[0] == 'S') {
1816                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1817                                                 goto finish;
1818
1819                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1820                                                 goto finish;
1821
1822                                 } else if (de->d_name[0] == 'K' &&
1823                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1824                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1825
1826                                         /* We honour K links only for
1827                                          * halt/reboot. For the normal
1828                                          * runlevels we assume the
1829                                          * stop jobs will be
1830                                          * implicitly added by the
1831                                          * core logic. */
1832
1833                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1834                                                 goto finish;
1835
1836                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1837                                                 goto finish;
1838                                 }
1839                         }
1840                 }
1841
1842         r = 0;
1843
1844 finish:
1845         free(path);
1846         free(fpath);
1847         free(name);
1848         closedir(d);
1849
1850         return r;
1851 }
1852
1853 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1854         [SERVICE_DEAD] = "dead",
1855         [SERVICE_START_PRE] = "start-pre",
1856         [SERVICE_START] = "start",
1857         [SERVICE_START_POST] = "start-post",
1858         [SERVICE_RUNNING] = "running",
1859         [SERVICE_RELOAD] = "reload",
1860         [SERVICE_STOP] = "stop",
1861         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1862         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1863         [SERVICE_STOP_POST] = "stop-post",
1864         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1865         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1866         [SERVICE_MAINTAINANCE] = "maintainance",
1867         [SERVICE_AUTO_RESTART] = "auto-restart",
1868 };
1869
1870 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1871
1872 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1873         [SERVICE_ONCE] = "once",
1874         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1875         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1876 };
1877
1878 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1879
1880 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1881         [SERVICE_FORKING] = "forking",
1882         [SERVICE_SIMPLE] = "simple",
1883         [SERVICE_FINISH] = "finish"
1884 };
1885
1886 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1887
1888 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1889         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1890         [SERVICE_EXEC_START] = "ExecStart",
1891         [SERVICE_EXEC_START_POST] = "ExecStartPost",
1892         [SERVICE_EXEC_RELOAD] = "ExecReload",
1893         [SERVICE_EXEC_STOP] = "ExecStop",
1894         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1895 };
1896
1897 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1898
1899 const UnitVTable service_vtable = {
1900         .suffix = ".service",
1901
1902         .init = service_init,
1903         .done = service_done,
1904
1905         .dump = service_dump,
1906
1907         .start = service_start,
1908         .stop = service_stop,
1909         .reload = service_reload,
1910
1911         .can_reload = service_can_reload,
1912
1913         .active_state = service_active_state,
1914
1915         .sigchld_event = service_sigchld_event,
1916         .timer_event = service_timer_event,
1917
1918         .cgroup_notify_empty = service_cgroup_notify_event,
1919
1920         .enumerate = service_enumerate
1921 };