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
 736         exec_context_dump(&s->exec_context, f, prefix);
 737
 738         for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
 739
 740                 if (!s->exec_command[c])
 741                         continue;
 742
 743                 fprintf(f, "%s→ %s:\n",
 744                         prefix, service_exec_command_to_string(c));
 745
 746                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 747         }
 748
 749         if (s->sysv_path)
 750                 fprintf(f,
 751                         "%sSysV Init Script Path: %s\n"
 752                         "%sSysV Init Script has LSB Header: %s\n",
 753                         prefix, s->sysv_path,
 754                         prefix, yes_no(s->sysv_has_lsb));
 755
 756         if (s->sysv_start_priority >= 0)
 757                 fprintf(f,
 758                         "%sSysVStartPriority: %i\n",
 759                         prefix, s->sysv_start_priority);
 760
 761
 762         free(p2);
 763 }
 764
 765 static int service_load_pid_file(Service *s) {
 766         char *k;
 767         unsigned long p;
 768         int r;
 769
 770         assert(s);
 771
 772         if (s->main_pid_known)
 773                 return 0;
 774
 775         if (!s->pid_file)
 776                 return -ENOENT;
 777
 778         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 779                 return r;
 780
 781         if ((r = safe_atolu(k, &p)) < 0) {
 782                 free(k);
 783                 return r;
 784         }
 785
 786         if ((unsigned long) (pid_t) p != p)
 787                 return -ERANGE;
 788
 789         s->main_pid = p;
 790         s->main_pid_known = true;
 791
 792         return 0;
 793 }
 794
 795 static int service_get_sockets(Service *s, Set **_set) {
 796         Set *set;
 797         Iterator i;
 798         char *t;
 799         int r;
 800
 801         assert(s);
 802         assert(_set);
 803
 804         /* Collects all Socket objects that belong to this
 805          * service. Note that a service might have multiple sockets
 806          * via multiple names. */
 807
 808         if (!(set = set_new(NULL, NULL)))
 809                 return -ENOMEM;
 810
 811         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 812                 char *k;
 813                 Unit *p;
 814
 815                 /* Look for all socket objects that go by any of our
 816                  * units and collect their fds */
 817
 818                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 819                         r = -ENOMEM;
 820                         goto fail;
 821                 }
 822
 823                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 824                 free(k);
 825
 826                 if (!p) continue;
 827
 828                 if ((r = set_put(set, p)) < 0)
 829                         goto fail;
 830         }
 831
 832         *_set = set;
 833         return 0;
 834
 835 fail:
 836         set_free(set);
 837         return r;
 838 }
 839
 840
 841 static int service_notify_sockets(Service *s) {
 842         Iterator i;
 843         Set *set;
 844         Socket *sock;
 845         int r;
 846
 847         assert(s);
 848
 849         /* Notifies all our sockets when we die */
 850
 851         if ((r = service_get_sockets(s, &set)) < 0)
 852                 return r;
 853
 854         SET_FOREACH(sock, set, i)
 855                 socket_notify_service_dead(sock);
 856
 857         set_free(set);
 858
 859         return 0;
 860 }
 861
 862 static void service_set_state(Service *s, ServiceState state) {
 863         ServiceState old_state;
 864         assert(s);
 865
 866         old_state = s->state;
 867         s->state = state;
 868
 869         if (state != SERVICE_START_PRE &&
 870             state != SERVICE_START &&
 871             state != SERVICE_START_POST &&
 872             state != SERVICE_RELOAD &&
 873             state != SERVICE_STOP &&
 874             state != SERVICE_STOP_SIGTERM &&
 875             state != SERVICE_STOP_SIGKILL &&
 876             state != SERVICE_STOP_POST &&
 877             state != SERVICE_FINAL_SIGTERM &&
 878             state != SERVICE_FINAL_SIGKILL &&
 879             state != SERVICE_AUTO_RESTART)
 880                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 881
 882         if (state != SERVICE_START &&
 883             state != SERVICE_START_POST &&
 884             state != SERVICE_RUNNING &&
 885             state != SERVICE_RELOAD &&
 886             state != SERVICE_STOP &&
 887             state != SERVICE_STOP_SIGTERM &&
 888             state != SERVICE_STOP_SIGKILL)
 889                 if (s->main_pid > 0) {
 890                         unit_unwatch_pid(UNIT(s), s->main_pid);
 891                         s->main_pid = 0;
 892                 }
 893
 894         if (state != SERVICE_START_PRE &&
 895             state != SERVICE_START &&
 896             state != SERVICE_START_POST &&
 897             state != SERVICE_RELOAD &&
 898             state != SERVICE_STOP &&
 899             state != SERVICE_STOP_SIGTERM &&
 900             state != SERVICE_STOP_SIGKILL &&
 901             state != SERVICE_STOP_POST &&
 902             state != SERVICE_FINAL_SIGTERM &&
 903             state != SERVICE_FINAL_SIGKILL)
 904                 if (s->control_pid > 0) {
 905                         unit_unwatch_pid(UNIT(s), s->control_pid);
 906                         s->control_pid = 0;
 907                 }
 908
 909         if (state != SERVICE_START_PRE &&
 910             state != SERVICE_START &&
 911             state != SERVICE_START_POST &&
 912             state != SERVICE_RELOAD &&
 913             state != SERVICE_STOP &&
 914             state != SERVICE_STOP_POST)
 915                 s->control_command = NULL;
 916
 917         if (state == SERVICE_DEAD ||
 918             state == SERVICE_STOP ||
 919             state == SERVICE_STOP_SIGTERM ||
 920             state == SERVICE_STOP_SIGKILL ||
 921             state == SERVICE_STOP_POST ||
 922             state == SERVICE_FINAL_SIGTERM ||
 923             state == SERVICE_FINAL_SIGKILL ||
 924             state == SERVICE_MAINTAINANCE ||
 925             state == SERVICE_AUTO_RESTART)
 926                 service_notify_sockets(s);
 927
 928         log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 929
 930         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 931 }
 932
 933 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
 934         Iterator i;
 935         int r;
 936         int *rfds = NULL;
 937         unsigned rn_fds = 0;
 938         Set *set;
 939         Socket *sock;
 940
 941         assert(s);
 942         assert(fds);
 943         assert(n_fds);
 944
 945         if ((r = service_get_sockets(s, &set)) < 0)
 946                 return r;
 947
 948         SET_FOREACH(sock, set, i) {
 949                 int *cfds;
 950                 unsigned cn_fds;
 951
 952                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
 953                         goto fail;
 954
 955                 if (!cfds)
 956                         continue;
 957
 958                 if (!rfds) {
 959                         rfds = cfds;
 960                         rn_fds = cn_fds;
 961                 } else {
 962                         int *t;
 963
 964                         if (!(t = new(int, rn_fds+cn_fds))) {
 965                                 free(cfds);
 966                                 r = -ENOMEM;
 967                                 goto fail;
 968                         }
 969
 970                         memcpy(t, rfds, rn_fds);
 971                         memcpy(t+rn_fds, cfds, cn_fds);
 972                         free(rfds);
 973                         free(cfds);
 974
 975                         rfds = t;
 976                         rn_fds = rn_fds+cn_fds;
 977                 }
 978         }
 979
 980         *fds = rfds;
 981         *n_fds = rn_fds;
 982
 983         set_free(set);
 984
 985         return 0;
 986
 987 fail:
 988         set_free(set);
 989         free(rfds);
 990
 991         return r;
 992 }
 993
 994 static int service_spawn(
 995                 Service *s,
 996                 ExecCommand *c,
 997                 bool timeout,
 998                 bool pass_fds,
 999                 bool apply_permissions,
1000                 bool apply_chroot,
1001                 pid_t *_pid) {
1002
1003         pid_t pid;
1004         int r;
1005         int *fds = NULL;
1006         unsigned n_fds = 0;
1007
1008         assert(s);
1009         assert(c);
1010         assert(_pid);
1011
1012         if (pass_fds)
1013                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1014                         goto fail;
1015
1016         if (timeout) {
1017                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1018                         goto fail;
1019         } else
1020                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1021
1022         if ((r = exec_spawn(c,
1023                             &s->exec_context,
1024                             fds, n_fds,
1025                             apply_permissions,
1026                             apply_chroot,
1027                             UNIT(s)->meta.cgroup_bondings,
1028                             &pid)) < 0)
1029                 goto fail;
1030
1031         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1032                 /* FIXME: we need to do something here */
1033                 goto fail;
1034
1035         free(fds);
1036         *_pid = pid;
1037
1038         return 0;
1039
1040 fail:
1041         free(fds);
1042
1043         if (timeout)
1044                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1045
1046         return r;
1047 }
1048
1049 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1050         int r;
1051         assert(s);
1052
1053         if (!success)
1054                 s->failure = true;
1055
1056         if (allow_restart &&
1057             (s->restart == SERVICE_RESTART_ALWAYS ||
1058              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1059
1060                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1061                         goto fail;
1062
1063                 service_set_state(s, SERVICE_AUTO_RESTART);
1064         } else
1065                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1066
1067         return;
1068
1069 fail:
1070         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1071         service_enter_dead(s, false, false);
1072 }
1073
1074 static void service_enter_signal(Service *s, ServiceState state, bool success);
1075
1076 static void service_enter_stop_post(Service *s, bool success) {
1077         int r;
1078         assert(s);
1079
1080         if (!success)
1081                 s->failure = true;
1082
1083         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1084                 if ((r = service_spawn(s,
1085                                        s->control_command,
1086                                        true,
1087                                        false,
1088                                        !s->permissions_start_only,
1089                                        !s->root_directory_start_only,
1090                                        &s->control_pid)) < 0)
1091                         goto fail;
1092
1093
1094         service_set_state(s, SERVICE_STOP_POST);
1095
1096         if (!s->control_command)
1097                 service_enter_dead(s, true, true);
1098
1099         return;
1100
1101 fail:
1102         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1103         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1104 }
1105
1106 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1107         int r;
1108         bool sent = false;
1109
1110         assert(s);
1111
1112         if (!success)
1113                 s->failure = true;
1114
1115         if (s->main_pid > 0 || s->control_pid > 0) {
1116                 int sig;
1117
1118                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1119
1120                 r = 0;
1121                 if (s->main_pid > 0) {
1122                         if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
1123                                 r = -errno;
1124                         else
1125                                 sent = true;
1126                 }
1127
1128                 if (s->control_pid > 0) {
1129                         if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
1130                                 r = -errno;
1131                         else
1132                                 sent = true;
1133                 }
1134
1135                 if (r < 0)
1136                         goto fail;
1137         }
1138
1139         service_set_state(s, state);
1140
1141         if (s->main_pid <= 0 && s->control_pid <= 0)
1142                 service_enter_dead(s, true, true);
1143
1144         return;
1145
1146 fail:
1147         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1148
1149         if (sent)  {
1150                 s->failure = true;
1151                 service_set_state(s, state);
1152         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1153                 service_enter_stop_post(s, false);
1154         else
1155                 service_enter_dead(s, false, true);
1156 }
1157
1158 static void service_enter_stop(Service *s, bool success) {
1159         int r;
1160         assert(s);
1161
1162         if (!success)
1163                 s->failure = true;
1164
1165         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1166                 if ((r = service_spawn(s,
1167                                        s->control_command,
1168                                        true,
1169                                        false,
1170                                        !s->permissions_start_only,
1171                                        !s->root_directory_start_only,
1172                                        &s->control_pid)) < 0)
1173                         goto fail;
1174
1175         service_set_state(s, SERVICE_STOP);
1176
1177         if (!s->control_command)
1178                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1179
1180         return;
1181
1182 fail:
1183         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1184         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1185 }
1186
1187 static void service_enter_start_post(Service *s) {
1188         int r;
1189         assert(s);
1190
1191         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1192                 if ((r = service_spawn(s,
1193                                        s->control_command,
1194                                        true,
1195                                        false,
1196                                        !s->permissions_start_only,
1197                                        !s->root_directory_start_only,
1198                                        &s->control_pid)) < 0)
1199                         goto fail;
1200
1201
1202         service_set_state(s, SERVICE_START_POST);
1203
1204         if (!s->control_command)
1205                 service_set_state(s, SERVICE_RUNNING);
1206
1207         return;
1208
1209 fail:
1210         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1211         service_enter_stop(s, false);
1212 }
1213
1214 static void service_enter_start(Service *s) {
1215         pid_t pid;
1216         int r;
1217
1218         assert(s);
1219
1220         assert(s->exec_command[SERVICE_EXEC_START]);
1221         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1222
1223         if ((r = service_spawn(s,
1224                                s->exec_command[SERVICE_EXEC_START],
1225                                s->type == SERVICE_FORKING,
1226                                true,
1227                                true,
1228                                true,
1229                                &pid)) < 0)
1230                 goto fail;
1231
1232         service_set_state(s, SERVICE_START);
1233
1234         if (s->type == SERVICE_SIMPLE) {
1235                 /* For simple services we immediately start
1236                  * the START_POST binaries. */
1237
1238                 s->main_pid = pid;
1239                 s->main_pid_known = true;
1240                 service_enter_start_post(s);
1241
1242         } else  if (s->type == SERVICE_FORKING) {
1243
1244                 /* For forking services we wait until the start
1245                  * process exited. */
1246
1247                 s->control_pid = pid;
1248                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1249         } else if (s->type == SERVICE_FINISH) {
1250
1251                 /* For finishing services we wait until the start
1252                  * process exited, too, but it is our main process. */
1253
1254                 s->main_pid = pid;
1255                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1256         } else
1257                 assert_not_reached("Unknown service type");
1258
1259         return;
1260
1261 fail:
1262         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1263         service_enter_stop(s, false);
1264 }
1265
1266 static void service_enter_start_pre(Service *s) {
1267         int r;
1268
1269         assert(s);
1270
1271         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1272                 if ((r = service_spawn(s,
1273                                        s->control_command,
1274                                        true,
1275                                        false,
1276                                        !s->permissions_start_only,
1277                                        !s->root_directory_start_only,
1278                                        &s->control_pid)) < 0)
1279                         goto fail;
1280
1281         service_set_state(s, SERVICE_START_PRE);
1282
1283         if (!s->control_command)
1284                 service_enter_start(s);
1285
1286         return;
1287
1288 fail:
1289         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1290         service_enter_dead(s, false, true);
1291 }
1292
1293 static void service_enter_restart(Service *s) {
1294         int r;
1295         assert(s);
1296
1297         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1298                 goto fail;
1299
1300         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1301         service_enter_dead(s, true, false);
1302         return;
1303
1304 fail:
1305
1306         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1307         service_enter_dead(s, false, false);
1308 }
1309
1310 static void service_enter_reload(Service *s) {
1311         int r;
1312
1313         assert(s);
1314
1315         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1316                 if ((r = service_spawn(s,
1317                                        s->control_command,
1318                                        true,
1319                                        false,
1320                                        !s->permissions_start_only,
1321                                        !s->root_directory_start_only,
1322                                        &s->control_pid)) < 0)
1323                         goto fail;
1324
1325         service_set_state(s, SERVICE_RELOAD);
1326
1327         if (!s->control_command)
1328                 service_set_state(s, SERVICE_RUNNING);
1329
1330         return;
1331
1332 fail:
1333         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1334         service_enter_stop(s, false);
1335 }
1336
1337 static void service_run_next(Service *s, bool success) {
1338         int r;
1339
1340         assert(s);
1341         assert(s->control_command);
1342         assert(s->control_command->command_next);
1343
1344         if (!success)
1345                 s->failure = true;
1346
1347         s->control_command = s->control_command->command_next;
1348
1349         if ((r = service_spawn(s,
1350                                s->control_command,
1351                                true,
1352                                false,
1353                                !s->permissions_start_only,
1354                                !s->root_directory_start_only,
1355                                &s->control_pid)) < 0)
1356                 goto fail;
1357
1358         return;
1359
1360 fail:
1361         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1362
1363         if (s->state == SERVICE_STOP)
1364                 service_enter_stop_post(s, false);
1365         else if (s->state == SERVICE_STOP_POST)
1366                 service_enter_dead(s, false, true);
1367         else
1368                 service_enter_stop(s, false);
1369 }
1370
1371 static int service_start(Unit *u) {
1372         Service *s = SERVICE(u);
1373
1374         assert(s);
1375
1376         /* We cannot fulfill this request right now, try again later
1377          * please! */
1378         if (s->state == SERVICE_STOP ||
1379             s->state == SERVICE_STOP_SIGTERM ||
1380             s->state == SERVICE_STOP_SIGKILL ||
1381             s->state == SERVICE_STOP_POST ||
1382             s->state == SERVICE_FINAL_SIGTERM ||
1383             s->state == SERVICE_FINAL_SIGKILL)
1384                 return -EAGAIN;
1385
1386         /* Already on it! */
1387         if (s->state == SERVICE_START_PRE ||
1388             s->state == SERVICE_START ||
1389             s->state == SERVICE_START_POST)
1390                 return 0;
1391
1392         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1393
1394         /* Make sure we don't enter a busy loop of some kind. */
1395         if (!ratelimit_test(&s->ratelimit)) {
1396                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1397                 return -EAGAIN;
1398         }
1399
1400         s->failure = false;
1401         s->main_pid_known = false;
1402
1403         service_enter_start_pre(s);
1404         return 0;
1405 }
1406
1407 static int service_stop(Unit *u) {
1408         Service *s = SERVICE(u);
1409
1410         assert(s);
1411
1412         if (s->state == SERVICE_START_PRE ||
1413             s->state == SERVICE_START ||
1414             s->state == SERVICE_START_POST ||
1415             s->state == SERVICE_RELOAD)
1416                 return -EAGAIN;
1417
1418         if (s->state == SERVICE_AUTO_RESTART) {
1419                 service_set_state(s, SERVICE_DEAD);
1420                 return 0;
1421         }
1422
1423         assert(s->state == SERVICE_RUNNING);
1424
1425         service_enter_stop(s, true);
1426         return 0;
1427 }
1428
1429 static int service_reload(Unit *u) {
1430         Service *s = SERVICE(u);
1431
1432         assert(s);
1433
1434         assert(s->state == SERVICE_RUNNING);
1435
1436         service_enter_reload(s);
1437         return 0;
1438 }
1439
1440 static bool service_can_reload(Unit *u) {
1441         Service *s = SERVICE(u);
1442
1443         assert(s);
1444
1445         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1446 }
1447
1448 static UnitActiveState service_active_state(Unit *u) {
1449         assert(u);
1450
1451         return state_translation_table[SERVICE(u)->state];
1452 }
1453
1454 static int main_pid_good(Service *s) {
1455         assert(s);
1456
1457         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1458          * don't know */
1459
1460         /* If we know the pid file, then lets just check if it is
1461          * still valid */
1462         if (s->main_pid_known)
1463                 return s->main_pid > 0;
1464
1465         /* We don't know the pid */
1466         return -EAGAIN;
1467 }
1468
1469 static bool control_pid_good(Service *s) {
1470         assert(s);
1471
1472         return s->control_pid > 0;
1473 }
1474
1475 static int cgroup_good(Service *s) {
1476         assert(s);
1477
1478         if (s->valid_no_process)
1479                 return -EAGAIN;
1480
1481         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1482 }
1483
1484 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1485         Service *s = SERVICE(u);
1486         bool success;
1487
1488         assert(s);
1489         assert(pid >= 0);
1490
1491         success = code == CLD_EXITED && status == 0;
1492         s->failure = s->failure || !success;
1493
1494         if (s->main_pid == pid) {
1495
1496                 exec_status_fill(&s->main_exec_status, pid, code, status);
1497                 s->main_pid = 0;
1498
1499                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1500                         assert(s->exec_command[SERVICE_EXEC_START]);
1501                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1502                 }
1503
1504                 log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1505
1506                 /* The service exited, so the service is officially
1507                  * gone. */
1508
1509                 switch (s->state) {
1510
1511                 case SERVICE_START_POST:
1512                 case SERVICE_RELOAD:
1513                 case SERVICE_STOP:
1514                         /* Need to wait until the operation is
1515                          * done */
1516                         break;
1517
1518                 case SERVICE_START:
1519                         assert(s->type == SERVICE_FINISH);
1520
1521                         /* This was our main goal, so let's go on */
1522                         if (success)
1523                                 service_enter_start_post(s);
1524                         else
1525                                 service_enter_stop(s, false);
1526                         break;
1527
1528                 case SERVICE_RUNNING:
1529                         service_enter_stop(s, success);
1530                         break;
1531
1532                 case SERVICE_STOP_SIGTERM:
1533                 case SERVICE_STOP_SIGKILL:
1534
1535                         if (!control_pid_good(s))
1536                                 service_enter_stop_post(s, success);
1537
1538                         /* If there is still a control process, wait for that first */
1539                         break;
1540
1541                 default:
1542                         assert_not_reached("Uh, main process died at wrong time.");
1543                 }
1544
1545         } else if (s->control_pid == pid) {
1546                 assert(s->control_command);
1547
1548                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1549                 s->control_pid = 0;
1550
1551                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1552
1553                 /* If we are shutting things down anyway we
1554                  * don't care about failing commands. */
1555
1556                 if (s->control_command->command_next &&
1557                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1558
1559                         /* There is another command to *
1560                          * execute, so let's do that. */
1561
1562                         service_run_next(s, success);
1563
1564                 else {
1565                         /* No further commands for this step, so let's
1566                          * figure out what to do next */
1567
1568                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1569
1570                         switch (s->state) {
1571
1572                         case SERVICE_START_PRE:
1573                                 if (success)
1574                                         service_enter_start(s);
1575                                 else
1576                                         service_enter_stop(s, false);
1577                                 break;
1578
1579                         case SERVICE_START:
1580                                 assert(s->type == SERVICE_FORKING);
1581
1582                                 /* Let's try to load the pid
1583                                  * file here if we can. We
1584                                  * ignore the return value,
1585                                  * since the PID file might
1586                                  * actually be created by a
1587                                  * START_POST script */
1588
1589                                 if (success) {
1590                                         if (s->pid_file)
1591                                                 service_load_pid_file(s);
1592
1593                                         service_enter_start_post(s);
1594                                 } else
1595                                         service_enter_stop(s, false);
1596
1597                                 break;
1598
1599                         case SERVICE_START_POST:
1600                                 if (success && s->pid_file && !s->main_pid_known) {
1601                                         int r;
1602
1603                                         /* Hmm, let's see if we can
1604                                          * load the pid now after the
1605                                          * start-post scripts got
1606                                          * executed. */
1607
1608                                         if ((r = service_load_pid_file(s)) < 0)
1609                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1610                                 }
1611
1612                                 /* Fall through */
1613
1614                         case SERVICE_RELOAD:
1615                                 if (success) {
1616                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1617                                                 service_set_state(s, SERVICE_RUNNING);
1618                                         else
1619                                                 service_enter_stop(s, true);
1620                                 } else
1621                                         service_enter_stop(s, false);
1622
1623                                 break;
1624
1625                         case SERVICE_STOP:
1626                                 if (main_pid_good(s) > 0)
1627                                         /* Still not dead and we know the PID? Let's go hunting. */
1628                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1629                                 else
1630                                         service_enter_stop_post(s, success);
1631                                 break;
1632
1633                         case SERVICE_STOP_SIGTERM:
1634                         case SERVICE_STOP_SIGKILL:
1635                                 if (main_pid_good(s) <= 0)
1636                                         service_enter_stop_post(s, success);
1637
1638                                 /* If there is still a service
1639                                  * process around, wait until
1640                                  * that one quit, too */
1641                                 break;
1642
1643                         case SERVICE_STOP_POST:
1644                         case SERVICE_FINAL_SIGTERM:
1645                         case SERVICE_FINAL_SIGKILL:
1646                                 service_enter_dead(s, success, true);
1647                                 break;
1648
1649                         default:
1650                                 assert_not_reached("Uh, control process died at wrong time.");
1651                         }
1652                 }
1653         } else
1654                 assert_not_reached("Got SIGCHLD for unkown PID");
1655 }
1656
1657 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1658         Service *s = SERVICE(u);
1659
1660         assert(s);
1661         assert(elapsed == 1);
1662
1663         assert(w == &s->timer_watch);
1664
1665         switch (s->state) {
1666
1667         case SERVICE_START_PRE:
1668         case SERVICE_START:
1669         case SERVICE_START_POST:
1670         case SERVICE_RELOAD:
1671                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1672                 service_enter_stop(s, false);
1673                 break;
1674
1675         case SERVICE_STOP:
1676                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1677                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1678                 break;
1679
1680         case SERVICE_STOP_SIGTERM:
1681                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1682                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1683                 break;
1684
1685         case SERVICE_STOP_SIGKILL:
1686                 /* Uh, wie sent a SIGKILL and it is still not gone?
1687                  * Must be something we cannot kill, so let's just be
1688                  * weirded out and continue */
1689
1690                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1691                 service_enter_stop_post(s, false);
1692                 break;
1693
1694         case SERVICE_STOP_POST:
1695                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1696                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1697                 break;
1698
1699         case SERVICE_FINAL_SIGTERM:
1700                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1701                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1702                 break;
1703
1704         case SERVICE_FINAL_SIGKILL:
1705                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1706                 service_enter_dead(s, false, true);
1707                 break;
1708
1709         case SERVICE_AUTO_RESTART:
1710                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1711                 service_enter_restart(s);
1712                 break;
1713
1714         default:
1715                 assert_not_reached("Timeout at wrong time.");
1716         }
1717 }
1718
1719 static void service_cgroup_notify_event(Unit *u) {
1720         Service *s = SERVICE(u);
1721
1722         assert(u);
1723
1724         log_debug("%s: cgroup is empty", unit_id(u));
1725
1726         switch (s->state) {
1727
1728                 /* Waiting for SIGCHLD is usually more interesting,
1729                  * because it includes return codes/signals. Which is
1730                  * why we ignore the cgroup events for most cases,
1731                  * except when we don't know pid which to expect the
1732                  * SIGCHLD for. */
1733
1734         case SERVICE_RUNNING:
1735
1736                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1737                         service_enter_stop(s, true);
1738
1739                 break;
1740
1741         default:
1742                 ;
1743         }
1744 }
1745
1746 static int service_enumerate(Manager *m) {
1747         char **p;
1748         unsigned i;
1749         DIR *d = NULL;
1750         char *path = NULL, *fpath = NULL, *name = NULL;
1751         int r;
1752
1753         assert(m);
1754
1755         STRV_FOREACH(p, m->sysvinit_path)
1756                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1757                         struct dirent *de;
1758
1759                         free(path);
1760                         path = NULL;
1761                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1762                                 r = -ENOMEM;
1763                                 goto finish;
1764                         }
1765
1766                         if (d)
1767                                 closedir(d);
1768
1769                         if (!(d = opendir(path))) {
1770                                 if (errno != ENOENT)
1771                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1772
1773                                 continue;
1774                         }
1775
1776                         while ((de = readdir(d))) {
1777                                 Unit *runlevel, *service;
1778
1779                                 if (ignore_file(de->d_name))
1780                                         continue;
1781
1782                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1783                                         continue;
1784
1785                                 if (strlen(de->d_name) < 4)
1786                                         continue;
1787
1788                                 free(fpath);
1789                                 fpath = NULL;
1790                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1791                                         r = -ENOMEM;
1792                                         goto finish;
1793                                 }
1794
1795                                 if (access(fpath, X_OK) < 0) {
1796
1797                                         if (errno != ENOENT)
1798                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1799
1800                                         continue;
1801                                 }
1802
1803                                 free(name);
1804                                 name = NULL;
1805                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1806                                         r = -ENOMEM;
1807                                         goto finish;
1808                                 }
1809
1810                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1811                                         goto finish;
1812
1813                                 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1814                                         goto finish;
1815
1816                                 if (de->d_name[0] == 'S') {
1817                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1818                                                 goto finish;
1819
1820                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1821                                                 goto finish;
1822
1823                                 } else if (de->d_name[0] == 'K' &&
1824                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1825                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1826
1827                                         /* We honour K links only for
1828                                          * halt/reboot. For the normal
1829                                          * runlevels we assume the
1830                                          * stop jobs will be
1831                                          * implicitly added by the
1832                                          * core logic. */
1833
1834                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1835                                                 goto finish;
1836
1837                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1838                                                 goto finish;
1839                                 }
1840                         }
1841                 }
1842
1843         r = 0;
1844
1845 finish:
1846         free(path);
1847         free(fpath);
1848         free(name);
1849         closedir(d);
1850
1851         return r;
1852 }
1853
1854 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1855         [SERVICE_DEAD] = "dead",
1856         [SERVICE_START_PRE] = "start-pre",
1857         [SERVICE_START] = "start",
1858         [SERVICE_START_POST] = "start-post",
1859         [SERVICE_RUNNING] = "running",
1860         [SERVICE_RELOAD] = "reload",
1861         [SERVICE_STOP] = "stop",
1862         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1863         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1864         [SERVICE_STOP_POST] = "stop-post",
1865         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1866         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1867         [SERVICE_MAINTAINANCE] = "maintainance",
1868         [SERVICE_AUTO_RESTART] = "auto-restart",
1869 };
1870
1871 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1872
1873 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1874         [SERVICE_ONCE] = "once",
1875         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1876         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1877 };
1878
1879 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1880
1881 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1882         [SERVICE_FORKING] = "forking",
1883         [SERVICE_SIMPLE] = "simple",
1884         [SERVICE_FINISH] = "finish"
1885 };
1886
1887 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1888
1889 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1890         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1891         [SERVICE_EXEC_START] = "ExecStart",
1892         [SERVICE_EXEC_START_POST] = "ExecStartPost",
1893         [SERVICE_EXEC_RELOAD] = "ExecReload",
1894         [SERVICE_EXEC_STOP] = "ExecStop",
1895         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1896 };
1897
1898 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1899
1900 const UnitVTable service_vtable = {
1901         .suffix = ".service",
1902
1903         .init = service_init,
1904         .done = service_done,
1905
1906         .dump = service_dump,
1907
1908         .start = service_start,
1909         .stop = service_stop,
1910         .reload = service_reload,
1911
1912         .can_reload = service_can_reload,
1913
1914         .active_state = service_active_state,
1915
1916         .sigchld_event = service_sigchld_event,
1917         .timer_event = service_timer_event,
1918
1919         .cgroup_notify_empty = service_cgroup_notify_event,
1920
1921         .enumerate = service_enumerate
1922 };