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         "/boot.d", SPECIAL_BASIC_TARGET
  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         free(s->sysv_runlevels);
  78         s->sysv_runlevels = NULL;
  79
  80         exec_context_done(&s->exec_context);
  81         exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
  82         s->control_command = NULL;
  83
  84         /* This will leak a process, but at least no memory or any of
  85          * our resources */
  86         if (s->main_pid > 0) {
  87                 unit_unwatch_pid(u, s->main_pid);
  88                 s->main_pid = 0;
  89         }
  90
  91         if (s->control_pid > 0) {
  92                 unit_unwatch_pid(u, s->control_pid);
  93                 s->control_pid = 0;
  94         }
  95
  96         unit_unwatch_timer(u, &s->timer_watch);
  97 }
  98
  99 static int sysv_translate_name(const char *name, char **_r) {
 100
 101         static const char * const table[] = {
 102                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 103                 "$network",   SPECIAL_NETWORK_TARGET,
 104                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 105                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 106                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 107                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 108                 "$time",      SPECIAL_RTC_SET_TARGET
 109         };
 110
 111         unsigned i;
 112         char *r;
 113
 114         for (i = 0; i < ELEMENTSOF(table); i += 2)
 115                 if (streq(table[i], name)) {
 116                         if (!(r = strdup(table[i+1])))
 117                                 return -ENOMEM;
 118
 119                         goto finish;
 120                 }
 121
 122         if (*name == '$')
 123                 return 0;
 124
 125         if (asprintf(&r, "%s.service", name) < 0)
 126                 return -ENOMEM;
 127
 128 finish:
 129
 130         if (_r)
 131                 *_r = r;
 132
 133         return 1;
 134 }
 135
 136 static int sysv_chkconfig_order(Service *s) {
 137         Meta *other;
 138         int r;
 139
 140         assert(s);
 141
 142         if (s->sysv_start_priority < 0)
 143                 return 0;
 144
 145         /* For each pair of services where at least one lacks a LSB
 146          * header, we use the start priority value to order things. */
 147
 148         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 149                 Service *t;
 150                 UnitDependency d;
 151
 152                 t = (Service*) other;
 153
 154                 if (s == t)
 155                         continue;
 156
 157                 if (t->sysv_start_priority < 0)
 158                         continue;
 159
 160                 if (s->sysv_has_lsb && t->sysv_has_lsb)
 161                         continue;
 162
 163                 if (t->sysv_start_priority < s->sysv_start_priority)
 164                         d = UNIT_AFTER;
 165                 else if (t->sysv_start_priority > s->sysv_start_priority)
 166                         d = UNIT_BEFORE;
 167                 else
 168                         continue;
 169
 170                 /* FIXME: Maybe we should compare the name here lexicographically? */
 171
 172                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
 173                         return r;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 180         ExecCommand *c;
 181
 182         if (!(c = new0(ExecCommand, 1)))
 183                 return NULL;
 184
 185         if (!(c->path = strdup(path))) {
 186                 free(c);
 187                 return NULL;
 188         }
 189
 190         if (!(c->argv = strv_new(path, arg1, NULL))) {
 191                 free(c->path);
 192                 free(c);
 193                 return NULL;
 194         }
 195
 196         return c;
 197 }
 198
 199 static int sysv_exec_commands(Service *s) {
 200         ExecCommand *c;
 201
 202         assert(s);
 203         assert(s->sysv_path);
 204
 205         if (!(c = exec_command_new(s->sysv_path, "start")))
 206                 return -ENOMEM;
 207         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 208
 209         if (!(c = exec_command_new(s->sysv_path, "stop")))
 210                 return -ENOMEM;
 211         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 212
 213         if (!(c = exec_command_new(s->sysv_path, "reload")))
 214                 return -ENOMEM;
 215         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 216
 217         return 0;
 218 }
 219
 220 static int priority_from_rcd(Service *s, const char *init_script) {
 221         char **p;
 222         unsigned i;
 223
 224         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
 225                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
 226                         char *path;
 227                         DIR *d;
 228                         struct dirent *de;
 229
 230                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
 231                                 return -ENOMEM;
 232
 233                         d = opendir(path);
 234                         free(path);
 235
 236                         if (!d) {
 237                                 if (errno != ENOENT)
 238                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
 239
 240                                 continue;
 241                         }
 242
 243                         while ((de = readdir(d))) {
 244                                 int a, b;
 245
 246                                 if (ignore_file(de->d_name))
 247                                         continue;
 248
 249                                 if (de->d_name[0] != 'S')
 250                                         continue;
 251
 252                                 if (strlen(de->d_name) < 4)
 253                                         continue;
 254
 255                                 if (!streq(de->d_name + 3, init_script))
 256                                         continue;
 257
 258                                 /* Yay, we found it! Now decode the priority */
 259
 260                                 a = undecchar(de->d_name[1]);
 261                                 b = undecchar(de->d_name[2]);
 262
 263                                 if (a < 0 || b < 0)
 264                                         continue;
 265
 266                                 s->sysv_start_priority = a*10 + b;
 267
 268                                 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
 269
 270                                 closedir(d);
 271                                 return 0;
 272                         }
 273
 274                         closedir(d);
 275                 }
 276
 277         return 0;
 278 }
 279
 280 static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) {
 281         FILE *f;
 282         Unit *u;
 283         unsigned line = 0;
 284         int r;
 285         enum {
 286                 NORMAL,
 287                 DESCRIPTION,
 288                 LSB,
 289                 LSB_DESCRIPTION
 290         } state = NORMAL;
 291
 292         assert(s);
 293         assert(path);
 294         assert(new_state);
 295
 296         u = UNIT(s);
 297
 298         if (!(f = fopen(path, "re"))) {
 299                 r = errno == ENOENT ? 0 : -errno;
 300                 goto finish;
 301         }
 302
 303         s->type = SERVICE_FORKING;
 304         s->restart = SERVICE_ONCE;
 305
 306         free(s->sysv_path);
 307         if (!(s->sysv_path = strdup(path))) {
 308                 r = -ENOMEM;
 309                 goto finish;
 310         }
 311
 312         while (!feof(f)) {
 313                 char l[LINE_MAX], *t;
 314
 315                 if (!fgets(l, sizeof(l), f)) {
 316                         if (feof(f))
 317                                 break;
 318
 319                         r = -errno;
 320                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 321                         goto finish;
 322                 }
 323
 324                 line++;
 325
 326                 t = strstrip(l);
 327                 if (*t != '#')
 328                         continue;
 329
 330                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 331                         state = LSB;
 332                         s->sysv_has_lsb = true;
 333                         continue;
 334                 }
 335
 336                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 337                         state = NORMAL;
 338                         continue;
 339                 }
 340
 341                 t++;
 342                 t += strspn(t, WHITESPACE);
 343
 344                 if (state == NORMAL) {
 345
 346                         /* Try to parse Red Hat style chkconfig headers */
 347
 348                         if (startswith(t, "chkconfig:")) {
 349                                 int start_priority;
 350                                 char runlevels[16], *k;
 351
 352                                 state = NORMAL;
 353
 354                                 if (sscanf(t+10, "%15s %i %*i",
 355                                            runlevels,
 356                                            &start_priority) != 2) {
 357
 358                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 359                                         continue;
 360                                 }
 361
 362                                 if (start_priority < 0 || start_priority > 99)
 363                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 364                                 else
 365                                         s->sysv_start_priority = start_priority;
 366
 367                                 char_array_0(runlevels);
 368                                 k = delete_chars(runlevels, WHITESPACE "-");
 369
 370                                 if (k[0]) {
 371                                         char *d;
 372
 373                                         if (!(d = strdup(k))) {
 374                                                 r = -ENOMEM;
 375                                                 goto finish;
 376                                         }
 377
 378                                         free(s->sysv_runlevels);
 379                                         s->sysv_runlevels = d;
 380                                 }
 381
 382
 383                         } else if (startswith(t, "description:")) {
 384
 385                                 size_t k = strlen(t);
 386                                 char *d;
 387
 388                                 if (t[k-1] == '\\') {
 389                                         state = DESCRIPTION;
 390                                         t[k-1] = 0;
 391                                 }
 392
 393                                 if (!(d = strdup(strstrip(t+12)))) {
 394                                         r = -ENOMEM;
 395                                         goto finish;
 396                                 }
 397
 398                                 free(u->meta.description);
 399                                 u->meta.description = d;
 400
 401                         } else if (startswith(t, "pidfile:")) {
 402
 403                                 char *fn;
 404
 405                                 state = NORMAL;
 406
 407                                 fn = strstrip(t+8);
 408                                 if (!path_is_absolute(fn)) {
 409                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 410                                         continue;
 411                                 }
 412
 413                                 if (!(fn = strdup(fn))) {
 414                                         r = -ENOMEM;
 415                                         goto finish;
 416                                 }
 417
 418                                 free(s->pid_file);
 419                                 s->pid_file = fn;
 420                         }
 421
 422                 } else if (state == DESCRIPTION) {
 423
 424                         /* Try to parse Red Hat style description
 425                          * continuation */
 426
 427                         size_t k = strlen(t);
 428                         char *d;
 429
 430                         if (t[k-1] == '\\')
 431                                 t[k-1] = 0;
 432                         else
 433                                 state = NORMAL;
 434
 435                         assert(u->meta.description);
 436                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 437                                 r = -ENOMEM;
 438                                 goto finish;
 439                         }
 440
 441                         free(u->meta.description);
 442                         u->meta.description = d;
 443
 444                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 445
 446                         if (startswith(t, "Provides:")) {
 447                                 char *i, *w;
 448                                 size_t z;
 449
 450                                 state = LSB;
 451
 452                                 FOREACH_WORD(w, z, t+9, i) {
 453                                         char *n, *m;
 454
 455                                         if (!(n = strndup(w, z))) {
 456                                                 r = -ENOMEM;
 457                                                 goto finish;
 458                                         }
 459
 460                                         r = sysv_translate_name(n, &m);
 461                                         free(n);
 462
 463                                         if (r < 0)
 464                                                 goto finish;
 465
 466                                         if (r == 0)
 467                                                 continue;
 468
 469                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 470                                                 r = unit_add_name(u, m);
 471                                         else {
 472                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
 473                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
 474                                         }
 475
 476                                         free(m);
 477
 478                                         if (r < 0)
 479                                                 goto finish;
 480                                 }
 481
 482                         } else if (startswith(t, "Required-Start:") ||
 483                                    startswith(t, "Should-Start:")) {
 484                                 char *i, *w;
 485                                 size_t z;
 486
 487                                 state = LSB;
 488
 489                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 490                                         char *n, *m;
 491
 492                                         if (!(n = strndup(w, z))) {
 493                                                 r = -ENOMEM;
 494                                                 goto finish;
 495                                         }
 496
 497                                         r = sysv_translate_name(n, &m);
 498                                         free(n);
 499
 500                                         if (r < 0)
 501                                                 goto finish;
 502
 503                                         if (r == 0)
 504                                                 continue;
 505
 506                                         r = unit_add_dependency_by_name(u, UNIT_AFTER, m);
 507                                         free(m);
 508
 509                                         if (r < 0)
 510                                                 goto finish;
 511                                 }
 512                         } else if (startswith(t, "Default-Start:")) {
 513                                 char *k, *d;
 514
 515                                 state = LSB;
 516
 517                                 k = delete_chars(t+14, WHITESPACE "-");
 518
 519                                 if (k[0] != 0) {
 520                                         if (!(d = strdup(k))) {
 521                                                 r = -ENOMEM;
 522                                                 goto finish;
 523                                         }
 524
 525                                         free(s->sysv_runlevels);
 526                                         s->sysv_runlevels = d;
 527                                 }
 528
 529                         } else if (startswith(t, "Description:")) {
 530                                 char *d;
 531
 532                                 state = LSB_DESCRIPTION;
 533
 534                                 if (!(d = strdup(strstrip(t+12)))) {
 535                                         r = -ENOMEM;
 536                                         goto finish;
 537                                 }
 538
 539                                 free(u->meta.description);
 540                                 u->meta.description = d;
 541
 542                         } else if (startswith(t, "Short-Description:") &&
 543                                    !u->meta.description) {
 544                                 char *d;
 545
 546                                 /* We use the short description only
 547                                  * if no long description is set. */
 548
 549                                 state = LSB;
 550
 551                                 if (!(d = strdup(strstrip(t+18)))) {
 552                                         r = -ENOMEM;
 553                                         goto finish;
 554                                 }
 555
 556                                 u->meta.description = d;
 557
 558                         } else if (state == LSB_DESCRIPTION) {
 559
 560                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 561                                         char *d;
 562
 563                                         assert(u->meta.description);
 564                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 565                                                 r = -ENOMEM;
 566                                                 goto finish;
 567                                         }
 568
 569                                         free(u->meta.description);
 570                                         u->meta.description = d;
 571                                 } else
 572                                         state = LSB;
 573                         }
 574                 }
 575         }
 576
 577         /* If init scripts have no LSB header, then we enforce the
 578          * ordering via the chkconfig priorities. We try to determine
 579          * a priority for *all* init scripts here, since they are
 580          * needed as soon as at least one non-LSB script is used. */
 581
 582         if (s->sysv_start_priority < 0) {
 583                 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
 584
 585                 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
 586                         goto finish;
 587
 588                 if (s->sysv_start_priority < 0)
 589                         log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
 590         }
 591
 592         if ((r = sysv_exec_commands(s)) < 0)
 593                 goto finish;
 594
 595         if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
 596                 /* If there a runlevels configured for this service
 597                  * but none of the standard ones, then we assume this
 598                  * is some special kind of service (which might be
 599                  * needed for early boot) and don't create any links
 600                  * to it. */
 601
 602                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
 603                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
 604                         goto finish;
 605         }
 606
 607         *new_state = UNIT_LOADED;
 608         r = 0;
 609
 610 finish:
 611
 612         if (f)
 613                 fclose(f);
 614
 615         return r;
 616 }
 617
 618 static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) {
 619         char **p;
 620
 621         assert(s);
 622         assert(name);
 623
 624         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 625                 char *path;
 626                 int r;
 627
 628                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 629                         return -ENOMEM;
 630
 631                 assert(endswith(path, ".service"));
 632                 path[strlen(path)-8] = 0;
 633
 634                 r = service_load_sysv_path(s, path, new_state);
 635                 free(path);
 636
 637                 if (r < 0)
 638                         return r;
 639
 640                 if (*new_state != UNIT_STUB)
 641                         break;
 642         }
 643
 644         return 0;
 645 }
 646
 647 static int service_load_sysv(Service *s, UnitLoadState *new_state) {
 648         const char *t;
 649         Iterator i;
 650         int r;
 651
 652         assert(s);
 653         assert(new_state);
 654
 655         /* Load service data from SysV init scripts, preferably with
 656          * LSB headers ... */
 657
 658         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 659                 return 0;
 660
 661         if ((t = unit_id(UNIT(s))))
 662                 if ((r = service_load_sysv_name(s, t, new_state)) < 0)
 663                         return r;
 664
 665         if (*new_state == UNIT_STUB)
 666                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 667                         if ((r == service_load_sysv_name(s, t, new_state)) < 0)
 668                                 return r;
 669
 670                         if (*new_state != UNIT_STUB)
 671                                 break;
 672                 }
 673
 674         return 0;
 675 }
 676
 677 static int service_init(Unit *u, UnitLoadState *new_state) {
 678         int r;
 679         Service *s = SERVICE(u);
 680
 681         assert(s);
 682         assert(new_state);
 683         assert(*new_state == UNIT_STUB);
 684
 685         /* First, reset everything to the defaults, in case this is a
 686          * reload */
 687
 688         s->type = 0;
 689         s->restart = 0;
 690
 691         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 692         s->restart_usec = DEFAULT_RESTART_USEC;
 693
 694         exec_context_init(&s->exec_context);
 695
 696         s->timer_watch.type = WATCH_INVALID;
 697
 698         s->state = SERVICE_DEAD;
 699
 700         s->sysv_start_priority = -1;
 701         s->permissions_start_only = false;
 702         s->root_directory_start_only = false;
 703
 704         s->sysv_has_lsb = false;
 705
 706         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 707
 708         /* Load a .service file */
 709         if ((r = unit_load_fragment(u, new_state)) < 0)
 710                 return r;
 711
 712         /* Load a classic init script as a fallback, if we couldn't find anything */
 713         if (*new_state == UNIT_STUB)
 714                 if ((r = service_load_sysv(s, new_state)) < 0)
 715                         return r;
 716
 717         /* Still nothing found? Then let's give up */
 718         if (*new_state == UNIT_STUB)
 719                 return -ENOENT;
 720
 721         /* We were able to load something, then let's add in the
 722          * dropin directories. */
 723         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 724                 return r;
 725
 726         /* This is a new unit? Then let's add in some extras */
 727         if (*new_state == UNIT_LOADED) {
 728                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 729                         return r;
 730
 731                 if ((r = unit_add_default_cgroup(u)) < 0)
 732                         return r;
 733
 734                 if ((r = sysv_chkconfig_order(s)) < 0)
 735                         return r;
 736         }
 737
 738         return 0;
 739 }
 740
 741 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 742
 743         ServiceExecCommand c;
 744         Service *s = SERVICE(u);
 745         const char *prefix2;
 746         char *p2;
 747
 748         assert(s);
 749
 750         p2 = strappend(prefix, "\t");
 751         prefix2 = p2 ? p2 : prefix;
 752
 753         fprintf(f,
 754                 "%sService State: %s\n"
 755                 "%sPermissionsStartOnly: %s\n"
 756                 "%sRootDirectoryStartOnly: %s\n"
 757                 "%sValidNoProcess: %s\n"
 758                 "%sType: %s\n",
 759                 prefix, service_state_to_string(s->state),
 760                 prefix, yes_no(s->permissions_start_only),
 761                 prefix, yes_no(s->root_directory_start_only),
 762                 prefix, yes_no(s->valid_no_process),
 763                 prefix, service_type_to_string(s->type));
 764
 765         if (s->pid_file)
 766                 fprintf(f,
 767                         "%sPIDFile: %s\n",
 768                         prefix, s->pid_file);
 769
 770         exec_context_dump(&s->exec_context, f, prefix);
 771
 772         for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
 773
 774                 if (!s->exec_command[c])
 775                         continue;
 776
 777                 fprintf(f, "%s→ %s:\n",
 778                         prefix, service_exec_command_to_string(c));
 779
 780                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 781         }
 782
 783         if (s->sysv_path)
 784                 fprintf(f,
 785                         "%sSysV Init Script Path: %s\n"
 786                         "%sSysV Init Script has LSB Header: %s\n",
 787                         prefix, s->sysv_path,
 788                         prefix, yes_no(s->sysv_has_lsb));
 789
 790         if (s->sysv_start_priority >= 0)
 791                 fprintf(f,
 792                         "%sSysVStartPriority: %i\n",
 793                         prefix, s->sysv_start_priority);
 794
 795         if (s->sysv_runlevels)
 796                 fprintf(f, "%sSysVRunLevels: %s\n",
 797                         prefix, s->sysv_runlevels);
 798
 799         free(p2);
 800 }
 801
 802 static int service_load_pid_file(Service *s) {
 803         char *k;
 804         unsigned long p;
 805         int r;
 806
 807         assert(s);
 808
 809         if (s->main_pid_known)
 810                 return 0;
 811
 812         if (!s->pid_file)
 813                 return -ENOENT;
 814
 815         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 816                 return r;
 817
 818         if ((r = safe_atolu(k, &p)) < 0) {
 819                 free(k);
 820                 return r;
 821         }
 822
 823         if ((unsigned long) (pid_t) p != p)
 824                 return -ERANGE;
 825
 826         s->main_pid = p;
 827         s->main_pid_known = true;
 828
 829         return 0;
 830 }
 831
 832 static int service_get_sockets(Service *s, Set **_set) {
 833         Set *set;
 834         Iterator i;
 835         char *t;
 836         int r;
 837
 838         assert(s);
 839         assert(_set);
 840
 841         /* Collects all Socket objects that belong to this
 842          * service. Note that a service might have multiple sockets
 843          * via multiple names. */
 844
 845         if (!(set = set_new(NULL, NULL)))
 846                 return -ENOMEM;
 847
 848         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 849                 char *k;
 850                 Unit *p;
 851
 852                 /* Look for all socket objects that go by any of our
 853                  * units and collect their fds */
 854
 855                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 856                         r = -ENOMEM;
 857                         goto fail;
 858                 }
 859
 860                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 861                 free(k);
 862
 863                 if (!p) continue;
 864
 865                 if ((r = set_put(set, p)) < 0)
 866                         goto fail;
 867         }
 868
 869         *_set = set;
 870         return 0;
 871
 872 fail:
 873         set_free(set);
 874         return r;
 875 }
 876
 877
 878 static int service_notify_sockets(Service *s) {
 879         Iterator i;
 880         Set *set;
 881         Socket *sock;
 882         int r;
 883
 884         assert(s);
 885
 886         /* Notifies all our sockets when we die */
 887
 888         if ((r = service_get_sockets(s, &set)) < 0)
 889                 return r;
 890
 891         SET_FOREACH(sock, set, i)
 892                 socket_notify_service_dead(sock);
 893
 894         set_free(set);
 895
 896         return 0;
 897 }
 898
 899 static void service_set_state(Service *s, ServiceState state) {
 900         ServiceState old_state;
 901         assert(s);
 902
 903         old_state = s->state;
 904         s->state = state;
 905
 906         if (state != SERVICE_START_PRE &&
 907             state != SERVICE_START &&
 908             state != SERVICE_START_POST &&
 909             state != SERVICE_RELOAD &&
 910             state != SERVICE_STOP &&
 911             state != SERVICE_STOP_SIGTERM &&
 912             state != SERVICE_STOP_SIGKILL &&
 913             state != SERVICE_STOP_POST &&
 914             state != SERVICE_FINAL_SIGTERM &&
 915             state != SERVICE_FINAL_SIGKILL &&
 916             state != SERVICE_AUTO_RESTART)
 917                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 918
 919         if (state != SERVICE_START &&
 920             state != SERVICE_START_POST &&
 921             state != SERVICE_RUNNING &&
 922             state != SERVICE_RELOAD &&
 923             state != SERVICE_STOP &&
 924             state != SERVICE_STOP_SIGTERM &&
 925             state != SERVICE_STOP_SIGKILL)
 926                 if (s->main_pid > 0) {
 927                         unit_unwatch_pid(UNIT(s), s->main_pid);
 928                         s->main_pid = 0;
 929                 }
 930
 931         if (state != SERVICE_START_PRE &&
 932             state != SERVICE_START &&
 933             state != SERVICE_START_POST &&
 934             state != SERVICE_RELOAD &&
 935             state != SERVICE_STOP &&
 936             state != SERVICE_STOP_SIGTERM &&
 937             state != SERVICE_STOP_SIGKILL &&
 938             state != SERVICE_STOP_POST &&
 939             state != SERVICE_FINAL_SIGTERM &&
 940             state != SERVICE_FINAL_SIGKILL)
 941                 if (s->control_pid > 0) {
 942                         unit_unwatch_pid(UNIT(s), s->control_pid);
 943                         s->control_pid = 0;
 944                 }
 945
 946         if (state != SERVICE_START_PRE &&
 947             state != SERVICE_START &&
 948             state != SERVICE_START_POST &&
 949             state != SERVICE_RELOAD &&
 950             state != SERVICE_STOP &&
 951             state != SERVICE_STOP_POST)
 952                 s->control_command = NULL;
 953
 954         if (state == SERVICE_DEAD ||
 955             state == SERVICE_STOP ||
 956             state == SERVICE_STOP_SIGTERM ||
 957             state == SERVICE_STOP_SIGKILL ||
 958             state == SERVICE_STOP_POST ||
 959             state == SERVICE_FINAL_SIGTERM ||
 960             state == SERVICE_FINAL_SIGKILL ||
 961             state == SERVICE_MAINTAINANCE ||
 962             state == SERVICE_AUTO_RESTART)
 963                 service_notify_sockets(s);
 964
 965         log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 966
 967         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 968 }
 969
 970 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
 971         Iterator i;
 972         int r;
 973         int *rfds = NULL;
 974         unsigned rn_fds = 0;
 975         Set *set;
 976         Socket *sock;
 977
 978         assert(s);
 979         assert(fds);
 980         assert(n_fds);
 981
 982         if ((r = service_get_sockets(s, &set)) < 0)
 983                 return r;
 984
 985         SET_FOREACH(sock, set, i) {
 986                 int *cfds;
 987                 unsigned cn_fds;
 988
 989                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
 990                         goto fail;
 991
 992                 if (!cfds)
 993                         continue;
 994
 995                 if (!rfds) {
 996                         rfds = cfds;
 997                         rn_fds = cn_fds;
 998                 } else {
 999                         int *t;
1000
1001                         if (!(t = new(int, rn_fds+cn_fds))) {
1002                                 free(cfds);
1003                                 r = -ENOMEM;
1004                                 goto fail;
1005                         }
1006
1007                         memcpy(t, rfds, rn_fds);
1008                         memcpy(t+rn_fds, cfds, cn_fds);
1009                         free(rfds);
1010                         free(cfds);
1011
1012                         rfds = t;
1013                         rn_fds = rn_fds+cn_fds;
1014                 }
1015         }
1016
1017         *fds = rfds;
1018         *n_fds = rn_fds;
1019
1020         set_free(set);
1021
1022         return 0;
1023
1024 fail:
1025         set_free(set);
1026         free(rfds);
1027
1028         return r;
1029 }
1030
1031 static int service_spawn(
1032                 Service *s,
1033                 ExecCommand *c,
1034                 bool timeout,
1035                 bool pass_fds,
1036                 bool apply_permissions,
1037                 bool apply_chroot,
1038                 pid_t *_pid) {
1039
1040         pid_t pid;
1041         int r;
1042         int *fds = NULL;
1043         unsigned n_fds = 0;
1044
1045         assert(s);
1046         assert(c);
1047         assert(_pid);
1048
1049         if (pass_fds)
1050                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1051                         goto fail;
1052
1053         if (timeout) {
1054                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1055                         goto fail;
1056         } else
1057                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1058
1059         if ((r = exec_spawn(c,
1060                             &s->exec_context,
1061                             fds, n_fds,
1062                             apply_permissions,
1063                             apply_chroot,
1064                             UNIT(s)->meta.cgroup_bondings,
1065                             &pid)) < 0)
1066                 goto fail;
1067
1068         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1069                 /* FIXME: we need to do something here */
1070                 goto fail;
1071
1072         free(fds);
1073         *_pid = pid;
1074
1075         return 0;
1076
1077 fail:
1078         free(fds);
1079
1080         if (timeout)
1081                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1082
1083         return r;
1084 }
1085
1086 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1087         int r;
1088         assert(s);
1089
1090         if (!success)
1091                 s->failure = true;
1092
1093         if (allow_restart &&
1094             (s->restart == SERVICE_RESTART_ALWAYS ||
1095              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1096
1097                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1098                         goto fail;
1099
1100                 service_set_state(s, SERVICE_AUTO_RESTART);
1101         } else
1102                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1103
1104         return;
1105
1106 fail:
1107         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1108         service_enter_dead(s, false, false);
1109 }
1110
1111 static void service_enter_signal(Service *s, ServiceState state, bool success);
1112
1113 static void service_enter_stop_post(Service *s, bool success) {
1114         int r;
1115         assert(s);
1116
1117         if (!success)
1118                 s->failure = true;
1119
1120         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1121                 if ((r = service_spawn(s,
1122                                        s->control_command,
1123                                        true,
1124                                        false,
1125                                        !s->permissions_start_only,
1126                                        !s->root_directory_start_only,
1127                                        &s->control_pid)) < 0)
1128                         goto fail;
1129
1130
1131         service_set_state(s, SERVICE_STOP_POST);
1132
1133         if (!s->control_command)
1134                 service_enter_dead(s, true, true);
1135
1136         return;
1137
1138 fail:
1139         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1140         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1141 }
1142
1143 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1144         int r;
1145         bool sent = false;
1146
1147         assert(s);
1148
1149         if (!success)
1150                 s->failure = true;
1151
1152         if (s->main_pid > 0 || s->control_pid > 0) {
1153                 int sig;
1154
1155                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1156
1157                 r = 0;
1158                 if (s->main_pid > 0) {
1159                         if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
1160                                 r = -errno;
1161                         else
1162                                 sent = true;
1163                 }
1164
1165                 if (s->control_pid > 0) {
1166                         if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
1167                                 r = -errno;
1168                         else
1169                                 sent = true;
1170                 }
1171
1172                 if (r < 0)
1173                         goto fail;
1174         }
1175
1176         service_set_state(s, state);
1177
1178         if (s->main_pid <= 0 && s->control_pid <= 0)
1179                 service_enter_dead(s, true, true);
1180
1181         return;
1182
1183 fail:
1184         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1185
1186         if (sent)  {
1187                 s->failure = true;
1188                 service_set_state(s, state);
1189         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1190                 service_enter_stop_post(s, false);
1191         else
1192                 service_enter_dead(s, false, true);
1193 }
1194
1195 static void service_enter_stop(Service *s, bool success) {
1196         int r;
1197         assert(s);
1198
1199         if (!success)
1200                 s->failure = true;
1201
1202         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1203                 if ((r = service_spawn(s,
1204                                        s->control_command,
1205                                        true,
1206                                        false,
1207                                        !s->permissions_start_only,
1208                                        !s->root_directory_start_only,
1209                                        &s->control_pid)) < 0)
1210                         goto fail;
1211
1212         service_set_state(s, SERVICE_STOP);
1213
1214         if (!s->control_command)
1215                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1216
1217         return;
1218
1219 fail:
1220         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1221         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1222 }
1223
1224 static void service_enter_start_post(Service *s) {
1225         int r;
1226         assert(s);
1227
1228         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1229                 if ((r = service_spawn(s,
1230                                        s->control_command,
1231                                        true,
1232                                        false,
1233                                        !s->permissions_start_only,
1234                                        !s->root_directory_start_only,
1235                                        &s->control_pid)) < 0)
1236                         goto fail;
1237
1238
1239         service_set_state(s, SERVICE_START_POST);
1240
1241         if (!s->control_command)
1242                 service_set_state(s, SERVICE_RUNNING);
1243
1244         return;
1245
1246 fail:
1247         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1248         service_enter_stop(s, false);
1249 }
1250
1251 static void service_enter_start(Service *s) {
1252         pid_t pid;
1253         int r;
1254
1255         assert(s);
1256
1257         assert(s->exec_command[SERVICE_EXEC_START]);
1258         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1259
1260         if ((r = service_spawn(s,
1261                                s->exec_command[SERVICE_EXEC_START],
1262                                s->type == SERVICE_FORKING,
1263                                true,
1264                                true,
1265                                true,
1266                                &pid)) < 0)
1267                 goto fail;
1268
1269         service_set_state(s, SERVICE_START);
1270
1271         if (s->type == SERVICE_SIMPLE) {
1272                 /* For simple services we immediately start
1273                  * the START_POST binaries. */
1274
1275                 s->main_pid = pid;
1276                 s->main_pid_known = true;
1277                 service_enter_start_post(s);
1278
1279         } else  if (s->type == SERVICE_FORKING) {
1280
1281                 /* For forking services we wait until the start
1282                  * process exited. */
1283
1284                 s->control_pid = pid;
1285                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1286         } else if (s->type == SERVICE_FINISH) {
1287
1288                 /* For finishing services we wait until the start
1289                  * process exited, too, but it is our main process. */
1290
1291                 s->main_pid = pid;
1292                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1293         } else
1294                 assert_not_reached("Unknown service type");
1295
1296         return;
1297
1298 fail:
1299         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1300         service_enter_stop(s, false);
1301 }
1302
1303 static void service_enter_start_pre(Service *s) {
1304         int r;
1305
1306         assert(s);
1307
1308         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1309                 if ((r = service_spawn(s,
1310                                        s->control_command,
1311                                        true,
1312                                        false,
1313                                        !s->permissions_start_only,
1314                                        !s->root_directory_start_only,
1315                                        &s->control_pid)) < 0)
1316                         goto fail;
1317
1318         service_set_state(s, SERVICE_START_PRE);
1319
1320         if (!s->control_command)
1321                 service_enter_start(s);
1322
1323         return;
1324
1325 fail:
1326         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1327         service_enter_dead(s, false, true);
1328 }
1329
1330 static void service_enter_restart(Service *s) {
1331         int r;
1332         assert(s);
1333
1334         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1335                 goto fail;
1336
1337         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1338         service_enter_dead(s, true, false);
1339         return;
1340
1341 fail:
1342
1343         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1344         service_enter_dead(s, false, false);
1345 }
1346
1347 static void service_enter_reload(Service *s) {
1348         int r;
1349
1350         assert(s);
1351
1352         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1353                 if ((r = service_spawn(s,
1354                                        s->control_command,
1355                                        true,
1356                                        false,
1357                                        !s->permissions_start_only,
1358                                        !s->root_directory_start_only,
1359                                        &s->control_pid)) < 0)
1360                         goto fail;
1361
1362         service_set_state(s, SERVICE_RELOAD);
1363
1364         if (!s->control_command)
1365                 service_set_state(s, SERVICE_RUNNING);
1366
1367         return;
1368
1369 fail:
1370         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1371         service_enter_stop(s, false);
1372 }
1373
1374 static void service_run_next(Service *s, bool success) {
1375         int r;
1376
1377         assert(s);
1378         assert(s->control_command);
1379         assert(s->control_command->command_next);
1380
1381         if (!success)
1382                 s->failure = true;
1383
1384         s->control_command = s->control_command->command_next;
1385
1386         if ((r = service_spawn(s,
1387                                s->control_command,
1388                                true,
1389                                false,
1390                                !s->permissions_start_only,
1391                                !s->root_directory_start_only,
1392                                &s->control_pid)) < 0)
1393                 goto fail;
1394
1395         return;
1396
1397 fail:
1398         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1399
1400         if (s->state == SERVICE_STOP)
1401                 service_enter_stop_post(s, false);
1402         else if (s->state == SERVICE_STOP_POST)
1403                 service_enter_dead(s, false, true);
1404         else
1405                 service_enter_stop(s, false);
1406 }
1407
1408 static int service_start(Unit *u) {
1409         Service *s = SERVICE(u);
1410
1411         assert(s);
1412
1413         /* We cannot fulfill this request right now, try again later
1414          * please! */
1415         if (s->state == SERVICE_STOP ||
1416             s->state == SERVICE_STOP_SIGTERM ||
1417             s->state == SERVICE_STOP_SIGKILL ||
1418             s->state == SERVICE_STOP_POST ||
1419             s->state == SERVICE_FINAL_SIGTERM ||
1420             s->state == SERVICE_FINAL_SIGKILL)
1421                 return -EAGAIN;
1422
1423         /* Already on it! */
1424         if (s->state == SERVICE_START_PRE ||
1425             s->state == SERVICE_START ||
1426             s->state == SERVICE_START_POST)
1427                 return 0;
1428
1429         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1430
1431         /* Make sure we don't enter a busy loop of some kind. */
1432         if (!ratelimit_test(&s->ratelimit)) {
1433                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1434                 return -EAGAIN;
1435         }
1436
1437         s->failure = false;
1438         s->main_pid_known = false;
1439
1440         service_enter_start_pre(s);
1441         return 0;
1442 }
1443
1444 static int service_stop(Unit *u) {
1445         Service *s = SERVICE(u);
1446
1447         assert(s);
1448
1449         if (s->state == SERVICE_START_PRE ||
1450             s->state == SERVICE_START ||
1451             s->state == SERVICE_START_POST ||
1452             s->state == SERVICE_RELOAD)
1453                 return -EAGAIN;
1454
1455         if (s->state == SERVICE_AUTO_RESTART) {
1456                 service_set_state(s, SERVICE_DEAD);
1457                 return 0;
1458         }
1459
1460         assert(s->state == SERVICE_RUNNING);
1461
1462         service_enter_stop(s, true);
1463         return 0;
1464 }
1465
1466 static int service_reload(Unit *u) {
1467         Service *s = SERVICE(u);
1468
1469         assert(s);
1470
1471         assert(s->state == SERVICE_RUNNING);
1472
1473         service_enter_reload(s);
1474         return 0;
1475 }
1476
1477 static bool service_can_reload(Unit *u) {
1478         Service *s = SERVICE(u);
1479
1480         assert(s);
1481
1482         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1483 }
1484
1485 static UnitActiveState service_active_state(Unit *u) {
1486         assert(u);
1487
1488         return state_translation_table[SERVICE(u)->state];
1489 }
1490
1491 static int main_pid_good(Service *s) {
1492         assert(s);
1493
1494         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1495          * don't know */
1496
1497         /* If we know the pid file, then lets just check if it is
1498          * still valid */
1499         if (s->main_pid_known)
1500                 return s->main_pid > 0;
1501
1502         /* We don't know the pid */
1503         return -EAGAIN;
1504 }
1505
1506 static bool control_pid_good(Service *s) {
1507         assert(s);
1508
1509         return s->control_pid > 0;
1510 }
1511
1512 static int cgroup_good(Service *s) {
1513         assert(s);
1514
1515         if (s->valid_no_process)
1516                 return -EAGAIN;
1517
1518         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1519 }
1520
1521 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1522         Service *s = SERVICE(u);
1523         bool success;
1524
1525         assert(s);
1526         assert(pid >= 0);
1527
1528         success = code == CLD_EXITED && status == 0;
1529         s->failure = s->failure || !success;
1530
1531         if (s->main_pid == pid) {
1532
1533                 exec_status_fill(&s->main_exec_status, pid, code, status);
1534                 s->main_pid = 0;
1535
1536                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1537                         assert(s->exec_command[SERVICE_EXEC_START]);
1538                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1539                 }
1540
1541                 log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1542
1543                 /* The service exited, so the service is officially
1544                  * gone. */
1545
1546                 switch (s->state) {
1547
1548                 case SERVICE_START_POST:
1549                 case SERVICE_RELOAD:
1550                 case SERVICE_STOP:
1551                         /* Need to wait until the operation is
1552                          * done */
1553                         break;
1554
1555                 case SERVICE_START:
1556                         assert(s->type == SERVICE_FINISH);
1557
1558                         /* This was our main goal, so let's go on */
1559                         if (success)
1560                                 service_enter_start_post(s);
1561                         else
1562                                 service_enter_stop(s, false);
1563                         break;
1564
1565                 case SERVICE_RUNNING:
1566                         service_enter_stop(s, success);
1567                         break;
1568
1569                 case SERVICE_STOP_SIGTERM:
1570                 case SERVICE_STOP_SIGKILL:
1571
1572                         if (!control_pid_good(s))
1573                                 service_enter_stop_post(s, success);
1574
1575                         /* If there is still a control process, wait for that first */
1576                         break;
1577
1578                 default:
1579                         assert_not_reached("Uh, main process died at wrong time.");
1580                 }
1581
1582         } else if (s->control_pid == pid) {
1583                 assert(s->control_command);
1584
1585                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1586                 s->control_pid = 0;
1587
1588                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1589
1590                 /* If we are shutting things down anyway we
1591                  * don't care about failing commands. */
1592
1593                 if (s->control_command->command_next &&
1594                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1595
1596                         /* There is another command to *
1597                          * execute, so let's do that. */
1598
1599                         service_run_next(s, success);
1600
1601                 else {
1602                         /* No further commands for this step, so let's
1603                          * figure out what to do next */
1604
1605                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1606
1607                         switch (s->state) {
1608
1609                         case SERVICE_START_PRE:
1610                                 if (success)
1611                                         service_enter_start(s);
1612                                 else
1613                                         service_enter_stop(s, false);
1614                                 break;
1615
1616                         case SERVICE_START:
1617                                 assert(s->type == SERVICE_FORKING);
1618
1619                                 /* Let's try to load the pid
1620                                  * file here if we can. We
1621                                  * ignore the return value,
1622                                  * since the PID file might
1623                                  * actually be created by a
1624                                  * START_POST script */
1625
1626                                 if (success) {
1627                                         if (s->pid_file)
1628                                                 service_load_pid_file(s);
1629
1630                                         service_enter_start_post(s);
1631                                 } else
1632                                         service_enter_stop(s, false);
1633
1634                                 break;
1635
1636                         case SERVICE_START_POST:
1637                                 if (success && s->pid_file && !s->main_pid_known) {
1638                                         int r;
1639
1640                                         /* Hmm, let's see if we can
1641                                          * load the pid now after the
1642                                          * start-post scripts got
1643                                          * executed. */
1644
1645                                         if ((r = service_load_pid_file(s)) < 0)
1646                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1647                                 }
1648
1649                                 /* Fall through */
1650
1651                         case SERVICE_RELOAD:
1652                                 if (success) {
1653                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1654                                                 service_set_state(s, SERVICE_RUNNING);
1655                                         else
1656                                                 service_enter_stop(s, true);
1657                                 } else
1658                                         service_enter_stop(s, false);
1659
1660                                 break;
1661
1662                         case SERVICE_STOP:
1663                                 if (main_pid_good(s) > 0)
1664                                         /* Still not dead and we know the PID? Let's go hunting. */
1665                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1666                                 else
1667                                         service_enter_stop_post(s, success);
1668                                 break;
1669
1670                         case SERVICE_STOP_SIGTERM:
1671                         case SERVICE_STOP_SIGKILL:
1672                                 if (main_pid_good(s) <= 0)
1673                                         service_enter_stop_post(s, success);
1674
1675                                 /* If there is still a service
1676                                  * process around, wait until
1677                                  * that one quit, too */
1678                                 break;
1679
1680                         case SERVICE_STOP_POST:
1681                         case SERVICE_FINAL_SIGTERM:
1682                         case SERVICE_FINAL_SIGKILL:
1683                                 service_enter_dead(s, success, true);
1684                                 break;
1685
1686                         default:
1687                                 assert_not_reached("Uh, control process died at wrong time.");
1688                         }
1689                 }
1690         } else
1691                 assert_not_reached("Got SIGCHLD for unkown PID");
1692 }
1693
1694 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1695         Service *s = SERVICE(u);
1696
1697         assert(s);
1698         assert(elapsed == 1);
1699
1700         assert(w == &s->timer_watch);
1701
1702         switch (s->state) {
1703
1704         case SERVICE_START_PRE:
1705         case SERVICE_START:
1706         case SERVICE_START_POST:
1707         case SERVICE_RELOAD:
1708                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1709                 service_enter_stop(s, false);
1710                 break;
1711
1712         case SERVICE_STOP:
1713                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1714                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1715                 break;
1716
1717         case SERVICE_STOP_SIGTERM:
1718                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1719                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1720                 break;
1721
1722         case SERVICE_STOP_SIGKILL:
1723                 /* Uh, wie sent a SIGKILL and it is still not gone?
1724                  * Must be something we cannot kill, so let's just be
1725                  * weirded out and continue */
1726
1727                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1728                 service_enter_stop_post(s, false);
1729                 break;
1730
1731         case SERVICE_STOP_POST:
1732                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1733                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1734                 break;
1735
1736         case SERVICE_FINAL_SIGTERM:
1737                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1738                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1739                 break;
1740
1741         case SERVICE_FINAL_SIGKILL:
1742                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1743                 service_enter_dead(s, false, true);
1744                 break;
1745
1746         case SERVICE_AUTO_RESTART:
1747                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1748                 service_enter_restart(s);
1749                 break;
1750
1751         default:
1752                 assert_not_reached("Timeout at wrong time.");
1753         }
1754 }
1755
1756 static void service_cgroup_notify_event(Unit *u) {
1757         Service *s = SERVICE(u);
1758
1759         assert(u);
1760
1761         log_debug("%s: cgroup is empty", unit_id(u));
1762
1763         switch (s->state) {
1764
1765                 /* Waiting for SIGCHLD is usually more interesting,
1766                  * because it includes return codes/signals. Which is
1767                  * why we ignore the cgroup events for most cases,
1768                  * except when we don't know pid which to expect the
1769                  * SIGCHLD for. */
1770
1771         case SERVICE_RUNNING:
1772
1773                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1774                         service_enter_stop(s, true);
1775
1776                 break;
1777
1778         default:
1779                 ;
1780         }
1781 }
1782
1783 static int service_enumerate(Manager *m) {
1784         char **p;
1785         unsigned i;
1786         DIR *d = NULL;
1787         char *path = NULL, *fpath = NULL, *name = NULL;
1788         int r;
1789
1790         assert(m);
1791
1792         STRV_FOREACH(p, m->sysvrcnd_path)
1793                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1794                         struct dirent *de;
1795
1796                         free(path);
1797                         path = NULL;
1798                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1799                                 r = -ENOMEM;
1800                                 goto finish;
1801                         }
1802
1803                         if (d)
1804                                 closedir(d);
1805
1806                         if (!(d = opendir(path))) {
1807                                 if (errno != ENOENT)
1808                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1809
1810                                 continue;
1811                         }
1812
1813                         while ((de = readdir(d))) {
1814                                 Unit *runlevel, *service;
1815
1816                                 if (ignore_file(de->d_name))
1817                                         continue;
1818
1819                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1820                                         continue;
1821
1822                                 if (strlen(de->d_name) < 4)
1823                                         continue;
1824
1825                                 free(fpath);
1826                                 fpath = NULL;
1827                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1828                                         r = -ENOMEM;
1829                                         goto finish;
1830                                 }
1831
1832                                 if (access(fpath, X_OK) < 0) {
1833
1834                                         if (errno != ENOENT)
1835                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1836
1837                                         continue;
1838                                 }
1839
1840                                 free(name);
1841                                 name = NULL;
1842                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1843                                         r = -ENOMEM;
1844                                         goto finish;
1845                                 }
1846
1847                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1848                                         goto finish;
1849
1850                                 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1851                                         goto finish;
1852
1853                                 if (de->d_name[0] == 'S') {
1854                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1855                                                 goto finish;
1856
1857                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1858                                                 goto finish;
1859
1860                                 } else if (de->d_name[0] == 'K' &&
1861                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1862                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1863
1864                                         /* We honour K links only for
1865                                          * halt/reboot. For the normal
1866                                          * runlevels we assume the
1867                                          * stop jobs will be
1868                                          * implicitly added by the
1869                                          * core logic. */
1870
1871                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1872                                                 goto finish;
1873
1874                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1875                                                 goto finish;
1876                                 }
1877                         }
1878                 }
1879
1880         r = 0;
1881
1882 finish:
1883         free(path);
1884         free(fpath);
1885         free(name);
1886         closedir(d);
1887
1888         return r;
1889 }
1890
1891 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1892         [SERVICE_DEAD] = "dead",
1893         [SERVICE_START_PRE] = "start-pre",
1894         [SERVICE_START] = "start",
1895         [SERVICE_START_POST] = "start-post",
1896         [SERVICE_RUNNING] = "running",
1897         [SERVICE_RELOAD] = "reload",
1898         [SERVICE_STOP] = "stop",
1899         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1900         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1901         [SERVICE_STOP_POST] = "stop-post",
1902         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1903         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1904         [SERVICE_MAINTAINANCE] = "maintainance",
1905         [SERVICE_AUTO_RESTART] = "auto-restart",
1906 };
1907
1908 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1909
1910 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1911         [SERVICE_ONCE] = "once",
1912         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1913         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1914 };
1915
1916 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1917
1918 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1919         [SERVICE_FORKING] = "forking",
1920         [SERVICE_SIMPLE] = "simple",
1921         [SERVICE_FINISH] = "finish"
1922 };
1923
1924 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1925
1926 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1927         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1928         [SERVICE_EXEC_START] = "ExecStart",
1929         [SERVICE_EXEC_START_POST] = "ExecStartPost",
1930         [SERVICE_EXEC_RELOAD] = "ExecReload",
1931         [SERVICE_EXEC_STOP] = "ExecStop",
1932         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1933 };
1934
1935 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1936
1937 const UnitVTable service_vtable = {
1938         .suffix = ".service",
1939
1940         .init = service_init,
1941         .done = service_done,
1942
1943         .dump = service_dump,
1944
1945         .start = service_start,
1946         .stop = service_stop,
1947         .reload = service_reload,
1948
1949         .can_reload = service_can_reload,
1950
1951         .active_state = service_active_state,
1952
1953         .sigchld_event = service_sigchld_event,
1954         .timer_event = service_timer_event,
1955
1956         .cgroup_notify_empty = service_cgroup_notify_event,
1957
1958         .enumerate = service_enumerate
1959 };