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