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 ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
 596             (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
 597                 goto finish;
 598
 599         *new_state = UNIT_LOADED;
 600         r = 0;
 601
 602 finish:
 603
 604         if (f)
 605                 fclose(f);
 606
 607         return r;
 608 }
 609
 610 static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) {
 611         char **p;
 612
 613         assert(s);
 614         assert(name);
 615
 616         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 617                 char *path;
 618                 int r;
 619
 620                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 621                         return -ENOMEM;
 622
 623                 assert(endswith(path, ".service"));
 624                 path[strlen(path)-8] = 0;
 625
 626                 r = service_load_sysv_path(s, path, new_state);
 627                 free(path);
 628
 629                 if (r < 0)
 630                         return r;
 631
 632                 if (*new_state != UNIT_STUB)
 633                         break;
 634         }
 635
 636         return 0;
 637 }
 638
 639 static int service_load_sysv(Service *s, UnitLoadState *new_state) {
 640         const char *t;
 641         Iterator i;
 642         int r;
 643
 644         assert(s);
 645         assert(new_state);
 646
 647         /* Load service data from SysV init scripts, preferably with
 648          * LSB headers ... */
 649
 650         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 651                 return 0;
 652
 653         if ((t = unit_id(UNIT(s))))
 654                 if ((r = service_load_sysv_name(s, t, new_state)) < 0)
 655                         return r;
 656
 657         if (*new_state == UNIT_STUB)
 658                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 659                         if ((r == service_load_sysv_name(s, t, new_state)) < 0)
 660                                 return r;
 661
 662                         if (*new_state != UNIT_STUB)
 663                                 break;
 664                 }
 665
 666         return 0;
 667 }
 668
 669 static int service_init(Unit *u, UnitLoadState *new_state) {
 670         int r;
 671         Service *s = SERVICE(u);
 672
 673         assert(s);
 674         assert(new_state);
 675         assert(*new_state == UNIT_STUB);
 676
 677         /* First, reset everything to the defaults, in case this is a
 678          * reload */
 679
 680         s->type = 0;
 681         s->restart = 0;
 682
 683         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 684         s->restart_usec = DEFAULT_RESTART_USEC;
 685
 686         exec_context_init(&s->exec_context);
 687
 688         s->timer_watch.type = WATCH_INVALID;
 689
 690         s->state = SERVICE_DEAD;
 691
 692         s->sysv_start_priority = -1;
 693         s->permissions_start_only = false;
 694         s->root_directory_start_only = false;
 695
 696         s->sysv_has_lsb = false;
 697
 698         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 699
 700         /* Load a .service file */
 701         if ((r = unit_load_fragment(u, new_state)) < 0)
 702                 return r;
 703
 704         /* Load a classic init script as a fallback, if we couldn't find anything */
 705         if (*new_state == UNIT_STUB)
 706                 if ((r = service_load_sysv(s, new_state)) < 0)
 707                         return r;
 708
 709         /* Still nothing found? Then let's give up */
 710         if (*new_state == UNIT_STUB)
 711                 return -ENOENT;
 712
 713         /* We were able to load something, then let's add in the
 714          * dropin directories. */
 715         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 716                 return r;
 717
 718         /* This is a new unit? Then let's add in some extras */
 719         if (*new_state == UNIT_LOADED) {
 720                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 721                         return r;
 722
 723                 if ((r = unit_add_default_cgroup(u)) < 0)
 724                         return r;
 725
 726                 if ((r = sysv_chkconfig_order(s)) < 0)
 727                         return r;
 728         }
 729
 730         return 0;
 731 }
 732
 733 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 734
 735         ServiceExecCommand c;
 736         Service *s = SERVICE(u);
 737         const char *prefix2;
 738         char *p2;
 739
 740         assert(s);
 741
 742         p2 = strappend(prefix, "\t");
 743         prefix2 = p2 ? p2 : prefix;
 744
 745         fprintf(f,
 746                 "%sService State: %s\n"
 747                 "%sPermissionsStartOnly: %s\n"
 748                 "%sRootDirectoryStartOnly: %s\n"
 749                 "%sValidNoProcess: %s\n"
 750                 "%sType: %s\n",
 751                 prefix, service_state_to_string(s->state),
 752                 prefix, yes_no(s->permissions_start_only),
 753                 prefix, yes_no(s->root_directory_start_only),
 754                 prefix, yes_no(s->valid_no_process),
 755                 prefix, service_type_to_string(s->type));
 756
 757         if (s->pid_file)
 758                 fprintf(f,
 759                         "%sPIDFile: %s\n",
 760                         prefix, s->pid_file);
 761
 762         exec_context_dump(&s->exec_context, f, prefix);
 763
 764         for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
 765
 766                 if (!s->exec_command[c])
 767                         continue;
 768
 769                 fprintf(f, "%s→ %s:\n",
 770                         prefix, service_exec_command_to_string(c));
 771
 772                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 773         }
 774
 775         if (s->sysv_path)
 776                 fprintf(f,
 777                         "%sSysV Init Script Path: %s\n"
 778                         "%sSysV Init Script has LSB Header: %s\n",
 779                         prefix, s->sysv_path,
 780                         prefix, yes_no(s->sysv_has_lsb));
 781
 782         if (s->sysv_start_priority >= 0)
 783                 fprintf(f,
 784                         "%sSysVStartPriority: %i\n",
 785                         prefix, s->sysv_start_priority);
 786
 787         if (s->sysv_runlevels)
 788                 fprintf(f, "%sSysVRunLevels: %s\n",
 789                         prefix, s->sysv_runlevels);
 790
 791         free(p2);
 792 }
 793
 794 static int service_load_pid_file(Service *s) {
 795         char *k;
 796         unsigned long p;
 797         int r;
 798
 799         assert(s);
 800
 801         if (s->main_pid_known)
 802                 return 0;
 803
 804         if (!s->pid_file)
 805                 return -ENOENT;
 806
 807         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 808                 return r;
 809
 810         if ((r = safe_atolu(k, &p)) < 0) {
 811                 free(k);
 812                 return r;
 813         }
 814
 815         if ((unsigned long) (pid_t) p != p)
 816                 return -ERANGE;
 817
 818         s->main_pid = p;
 819         s->main_pid_known = true;
 820
 821         return 0;
 822 }
 823
 824 static int service_get_sockets(Service *s, Set **_set) {
 825         Set *set;
 826         Iterator i;
 827         char *t;
 828         int r;
 829
 830         assert(s);
 831         assert(_set);
 832
 833         /* Collects all Socket objects that belong to this
 834          * service. Note that a service might have multiple sockets
 835          * via multiple names. */
 836
 837         if (!(set = set_new(NULL, NULL)))
 838                 return -ENOMEM;
 839
 840         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 841                 char *k;
 842                 Unit *p;
 843
 844                 /* Look for all socket objects that go by any of our
 845                  * units and collect their fds */
 846
 847                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 848                         r = -ENOMEM;
 849                         goto fail;
 850                 }
 851
 852                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 853                 free(k);
 854
 855                 if (!p) continue;
 856
 857                 if ((r = set_put(set, p)) < 0)
 858                         goto fail;
 859         }
 860
 861         *_set = set;
 862         return 0;
 863
 864 fail:
 865         set_free(set);
 866         return r;
 867 }
 868
 869
 870 static int service_notify_sockets(Service *s) {
 871         Iterator i;
 872         Set *set;
 873         Socket *sock;
 874         int r;
 875
 876         assert(s);
 877
 878         /* Notifies all our sockets when we die */
 879
 880         if ((r = service_get_sockets(s, &set)) < 0)
 881                 return r;
 882
 883         SET_FOREACH(sock, set, i)
 884                 socket_notify_service_dead(sock);
 885
 886         set_free(set);
 887
 888         return 0;
 889 }
 890
 891 static void service_set_state(Service *s, ServiceState state) {
 892         ServiceState old_state;
 893         assert(s);
 894
 895         old_state = s->state;
 896         s->state = state;
 897
 898         if (state != SERVICE_START_PRE &&
 899             state != SERVICE_START &&
 900             state != SERVICE_START_POST &&
 901             state != SERVICE_RELOAD &&
 902             state != SERVICE_STOP &&
 903             state != SERVICE_STOP_SIGTERM &&
 904             state != SERVICE_STOP_SIGKILL &&
 905             state != SERVICE_STOP_POST &&
 906             state != SERVICE_FINAL_SIGTERM &&
 907             state != SERVICE_FINAL_SIGKILL &&
 908             state != SERVICE_AUTO_RESTART)
 909                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 910
 911         if (state != SERVICE_START &&
 912             state != SERVICE_START_POST &&
 913             state != SERVICE_RUNNING &&
 914             state != SERVICE_RELOAD &&
 915             state != SERVICE_STOP &&
 916             state != SERVICE_STOP_SIGTERM &&
 917             state != SERVICE_STOP_SIGKILL)
 918                 if (s->main_pid > 0) {
 919                         unit_unwatch_pid(UNIT(s), s->main_pid);
 920                         s->main_pid = 0;
 921                 }
 922
 923         if (state != SERVICE_START_PRE &&
 924             state != SERVICE_START &&
 925             state != SERVICE_START_POST &&
 926             state != SERVICE_RELOAD &&
 927             state != SERVICE_STOP &&
 928             state != SERVICE_STOP_SIGTERM &&
 929             state != SERVICE_STOP_SIGKILL &&
 930             state != SERVICE_STOP_POST &&
 931             state != SERVICE_FINAL_SIGTERM &&
 932             state != SERVICE_FINAL_SIGKILL)
 933                 if (s->control_pid > 0) {
 934                         unit_unwatch_pid(UNIT(s), s->control_pid);
 935                         s->control_pid = 0;
 936                 }
 937
 938         if (state != SERVICE_START_PRE &&
 939             state != SERVICE_START &&
 940             state != SERVICE_START_POST &&
 941             state != SERVICE_RELOAD &&
 942             state != SERVICE_STOP &&
 943             state != SERVICE_STOP_POST)
 944                 s->control_command = NULL;
 945
 946         if (state == SERVICE_DEAD ||
 947             state == SERVICE_STOP ||
 948             state == SERVICE_STOP_SIGTERM ||
 949             state == SERVICE_STOP_SIGKILL ||
 950             state == SERVICE_STOP_POST ||
 951             state == SERVICE_FINAL_SIGTERM ||
 952             state == SERVICE_FINAL_SIGKILL ||
 953             state == SERVICE_MAINTAINANCE ||
 954             state == SERVICE_AUTO_RESTART)
 955                 service_notify_sockets(s);
 956
 957         log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 958
 959         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 960 }
 961
 962 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
 963         Iterator i;
 964         int r;
 965         int *rfds = NULL;
 966         unsigned rn_fds = 0;
 967         Set *set;
 968         Socket *sock;
 969
 970         assert(s);
 971         assert(fds);
 972         assert(n_fds);
 973
 974         if ((r = service_get_sockets(s, &set)) < 0)
 975                 return r;
 976
 977         SET_FOREACH(sock, set, i) {
 978                 int *cfds;
 979                 unsigned cn_fds;
 980
 981                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
 982                         goto fail;
 983
 984                 if (!cfds)
 985                         continue;
 986
 987                 if (!rfds) {
 988                         rfds = cfds;
 989                         rn_fds = cn_fds;
 990                 } else {
 991                         int *t;
 992
 993                         if (!(t = new(int, rn_fds+cn_fds))) {
 994                                 free(cfds);
 995                                 r = -ENOMEM;
 996                                 goto fail;
 997                         }
 998
 999                         memcpy(t, rfds, rn_fds);
1000                         memcpy(t+rn_fds, cfds, cn_fds);
1001                         free(rfds);
1002                         free(cfds);
1003
1004                         rfds = t;
1005                         rn_fds = rn_fds+cn_fds;
1006                 }
1007         }
1008
1009         *fds = rfds;
1010         *n_fds = rn_fds;
1011
1012         set_free(set);
1013
1014         return 0;
1015
1016 fail:
1017         set_free(set);
1018         free(rfds);
1019
1020         return r;
1021 }
1022
1023 static int service_spawn(
1024                 Service *s,
1025                 ExecCommand *c,
1026                 bool timeout,
1027                 bool pass_fds,
1028                 bool apply_permissions,
1029                 bool apply_chroot,
1030                 pid_t *_pid) {
1031
1032         pid_t pid;
1033         int r;
1034         int *fds = NULL;
1035         unsigned n_fds = 0;
1036
1037         assert(s);
1038         assert(c);
1039         assert(_pid);
1040
1041         if (pass_fds)
1042                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1043                         goto fail;
1044
1045         if (timeout) {
1046                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1047                         goto fail;
1048         } else
1049                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1050
1051         if ((r = exec_spawn(c,
1052                             &s->exec_context,
1053                             fds, n_fds,
1054                             apply_permissions,
1055                             apply_chroot,
1056                             UNIT(s)->meta.cgroup_bondings,
1057                             &pid)) < 0)
1058                 goto fail;
1059
1060         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1061                 /* FIXME: we need to do something here */
1062                 goto fail;
1063
1064         free(fds);
1065         *_pid = pid;
1066
1067         return 0;
1068
1069 fail:
1070         free(fds);
1071
1072         if (timeout)
1073                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1074
1075         return r;
1076 }
1077
1078 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1079         int r;
1080         assert(s);
1081
1082         if (!success)
1083                 s->failure = true;
1084
1085         if (allow_restart &&
1086             (s->restart == SERVICE_RESTART_ALWAYS ||
1087              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1088
1089                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1090                         goto fail;
1091
1092                 service_set_state(s, SERVICE_AUTO_RESTART);
1093         } else
1094                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1095
1096         return;
1097
1098 fail:
1099         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1100         service_enter_dead(s, false, false);
1101 }
1102
1103 static void service_enter_signal(Service *s, ServiceState state, bool success);
1104
1105 static void service_enter_stop_post(Service *s, bool success) {
1106         int r;
1107         assert(s);
1108
1109         if (!success)
1110                 s->failure = true;
1111
1112         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1113                 if ((r = service_spawn(s,
1114                                        s->control_command,
1115                                        true,
1116                                        false,
1117                                        !s->permissions_start_only,
1118                                        !s->root_directory_start_only,
1119                                        &s->control_pid)) < 0)
1120                         goto fail;
1121
1122
1123         service_set_state(s, SERVICE_STOP_POST);
1124
1125         if (!s->control_command)
1126                 service_enter_dead(s, true, true);
1127
1128         return;
1129
1130 fail:
1131         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1132         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1133 }
1134
1135 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1136         int r;
1137         bool sent = false;
1138
1139         assert(s);
1140
1141         if (!success)
1142                 s->failure = true;
1143
1144         if (s->main_pid > 0 || s->control_pid > 0) {
1145                 int sig;
1146
1147                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1148
1149                 r = 0;
1150                 if (s->main_pid > 0) {
1151                         if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
1152                                 r = -errno;
1153                         else
1154                                 sent = true;
1155                 }
1156
1157                 if (s->control_pid > 0) {
1158                         if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
1159                                 r = -errno;
1160                         else
1161                                 sent = true;
1162                 }
1163
1164                 if (r < 0)
1165                         goto fail;
1166         }
1167
1168         service_set_state(s, state);
1169
1170         if (s->main_pid <= 0 && s->control_pid <= 0)
1171                 service_enter_dead(s, true, true);
1172
1173         return;
1174
1175 fail:
1176         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1177
1178         if (sent)  {
1179                 s->failure = true;
1180                 service_set_state(s, state);
1181         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1182                 service_enter_stop_post(s, false);
1183         else
1184                 service_enter_dead(s, false, true);
1185 }
1186
1187 static void service_enter_stop(Service *s, bool success) {
1188         int r;
1189         assert(s);
1190
1191         if (!success)
1192                 s->failure = true;
1193
1194         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1195                 if ((r = service_spawn(s,
1196                                        s->control_command,
1197                                        true,
1198                                        false,
1199                                        !s->permissions_start_only,
1200                                        !s->root_directory_start_only,
1201                                        &s->control_pid)) < 0)
1202                         goto fail;
1203
1204         service_set_state(s, SERVICE_STOP);
1205
1206         if (!s->control_command)
1207                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1208
1209         return;
1210
1211 fail:
1212         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1213         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1214 }
1215
1216 static void service_enter_start_post(Service *s) {
1217         int r;
1218         assert(s);
1219
1220         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1221                 if ((r = service_spawn(s,
1222                                        s->control_command,
1223                                        true,
1224                                        false,
1225                                        !s->permissions_start_only,
1226                                        !s->root_directory_start_only,
1227                                        &s->control_pid)) < 0)
1228                         goto fail;
1229
1230
1231         service_set_state(s, SERVICE_START_POST);
1232
1233         if (!s->control_command)
1234                 service_set_state(s, SERVICE_RUNNING);
1235
1236         return;
1237
1238 fail:
1239         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1240         service_enter_stop(s, false);
1241 }
1242
1243 static void service_enter_start(Service *s) {
1244         pid_t pid;
1245         int r;
1246
1247         assert(s);
1248
1249         assert(s->exec_command[SERVICE_EXEC_START]);
1250         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1251
1252         if ((r = service_spawn(s,
1253                                s->exec_command[SERVICE_EXEC_START],
1254                                s->type == SERVICE_FORKING,
1255                                true,
1256                                true,
1257                                true,
1258                                &pid)) < 0)
1259                 goto fail;
1260
1261         service_set_state(s, SERVICE_START);
1262
1263         if (s->type == SERVICE_SIMPLE) {
1264                 /* For simple services we immediately start
1265                  * the START_POST binaries. */
1266
1267                 s->main_pid = pid;
1268                 s->main_pid_known = true;
1269                 service_enter_start_post(s);
1270
1271         } else  if (s->type == SERVICE_FORKING) {
1272
1273                 /* For forking services we wait until the start
1274                  * process exited. */
1275
1276                 s->control_pid = pid;
1277                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1278         } else if (s->type == SERVICE_FINISH) {
1279
1280                 /* For finishing services we wait until the start
1281                  * process exited, too, but it is our main process. */
1282
1283                 s->main_pid = pid;
1284                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1285         } else
1286                 assert_not_reached("Unknown service type");
1287
1288         return;
1289
1290 fail:
1291         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1292         service_enter_stop(s, false);
1293 }
1294
1295 static void service_enter_start_pre(Service *s) {
1296         int r;
1297
1298         assert(s);
1299
1300         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1301                 if ((r = service_spawn(s,
1302                                        s->control_command,
1303                                        true,
1304                                        false,
1305                                        !s->permissions_start_only,
1306                                        !s->root_directory_start_only,
1307                                        &s->control_pid)) < 0)
1308                         goto fail;
1309
1310         service_set_state(s, SERVICE_START_PRE);
1311
1312         if (!s->control_command)
1313                 service_enter_start(s);
1314
1315         return;
1316
1317 fail:
1318         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1319         service_enter_dead(s, false, true);
1320 }
1321
1322 static void service_enter_restart(Service *s) {
1323         int r;
1324         assert(s);
1325
1326         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1327                 goto fail;
1328
1329         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1330         service_enter_dead(s, true, false);
1331         return;
1332
1333 fail:
1334
1335         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1336         service_enter_dead(s, false, false);
1337 }
1338
1339 static void service_enter_reload(Service *s) {
1340         int r;
1341
1342         assert(s);
1343
1344         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1345                 if ((r = service_spawn(s,
1346                                        s->control_command,
1347                                        true,
1348                                        false,
1349                                        !s->permissions_start_only,
1350                                        !s->root_directory_start_only,
1351                                        &s->control_pid)) < 0)
1352                         goto fail;
1353
1354         service_set_state(s, SERVICE_RELOAD);
1355
1356         if (!s->control_command)
1357                 service_set_state(s, SERVICE_RUNNING);
1358
1359         return;
1360
1361 fail:
1362         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1363         service_enter_stop(s, false);
1364 }
1365
1366 static void service_run_next(Service *s, bool success) {
1367         int r;
1368
1369         assert(s);
1370         assert(s->control_command);
1371         assert(s->control_command->command_next);
1372
1373         if (!success)
1374                 s->failure = true;
1375
1376         s->control_command = s->control_command->command_next;
1377
1378         if ((r = service_spawn(s,
1379                                s->control_command,
1380                                true,
1381                                false,
1382                                !s->permissions_start_only,
1383                                !s->root_directory_start_only,
1384                                &s->control_pid)) < 0)
1385                 goto fail;
1386
1387         return;
1388
1389 fail:
1390         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1391
1392         if (s->state == SERVICE_STOP)
1393                 service_enter_stop_post(s, false);
1394         else if (s->state == SERVICE_STOP_POST)
1395                 service_enter_dead(s, false, true);
1396         else
1397                 service_enter_stop(s, false);
1398 }
1399
1400 static int service_start(Unit *u) {
1401         Service *s = SERVICE(u);
1402
1403         assert(s);
1404
1405         /* We cannot fulfill this request right now, try again later
1406          * please! */
1407         if (s->state == SERVICE_STOP ||
1408             s->state == SERVICE_STOP_SIGTERM ||
1409             s->state == SERVICE_STOP_SIGKILL ||
1410             s->state == SERVICE_STOP_POST ||
1411             s->state == SERVICE_FINAL_SIGTERM ||
1412             s->state == SERVICE_FINAL_SIGKILL)
1413                 return -EAGAIN;
1414
1415         /* Already on it! */
1416         if (s->state == SERVICE_START_PRE ||
1417             s->state == SERVICE_START ||
1418             s->state == SERVICE_START_POST)
1419                 return 0;
1420
1421         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1422
1423         /* Make sure we don't enter a busy loop of some kind. */
1424         if (!ratelimit_test(&s->ratelimit)) {
1425                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1426                 return -EAGAIN;
1427         }
1428
1429         s->failure = false;
1430         s->main_pid_known = false;
1431
1432         service_enter_start_pre(s);
1433         return 0;
1434 }
1435
1436 static int service_stop(Unit *u) {
1437         Service *s = SERVICE(u);
1438
1439         assert(s);
1440
1441         if (s->state == SERVICE_START_PRE ||
1442             s->state == SERVICE_START ||
1443             s->state == SERVICE_START_POST ||
1444             s->state == SERVICE_RELOAD)
1445                 return -EAGAIN;
1446
1447         if (s->state == SERVICE_AUTO_RESTART) {
1448                 service_set_state(s, SERVICE_DEAD);
1449                 return 0;
1450         }
1451
1452         assert(s->state == SERVICE_RUNNING);
1453
1454         service_enter_stop(s, true);
1455         return 0;
1456 }
1457
1458 static int service_reload(Unit *u) {
1459         Service *s = SERVICE(u);
1460
1461         assert(s);
1462
1463         assert(s->state == SERVICE_RUNNING);
1464
1465         service_enter_reload(s);
1466         return 0;
1467 }
1468
1469 static bool service_can_reload(Unit *u) {
1470         Service *s = SERVICE(u);
1471
1472         assert(s);
1473
1474         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1475 }
1476
1477 static UnitActiveState service_active_state(Unit *u) {
1478         assert(u);
1479
1480         return state_translation_table[SERVICE(u)->state];
1481 }
1482
1483 static int main_pid_good(Service *s) {
1484         assert(s);
1485
1486         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1487          * don't know */
1488
1489         /* If we know the pid file, then lets just check if it is
1490          * still valid */
1491         if (s->main_pid_known)
1492                 return s->main_pid > 0;
1493
1494         /* We don't know the pid */
1495         return -EAGAIN;
1496 }
1497
1498 static bool control_pid_good(Service *s) {
1499         assert(s);
1500
1501         return s->control_pid > 0;
1502 }
1503
1504 static int cgroup_good(Service *s) {
1505         assert(s);
1506
1507         if (s->valid_no_process)
1508                 return -EAGAIN;
1509
1510         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1511 }
1512
1513 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1514         Service *s = SERVICE(u);
1515         bool success;
1516
1517         assert(s);
1518         assert(pid >= 0);
1519
1520         success = code == CLD_EXITED && status == 0;
1521         s->failure = s->failure || !success;
1522
1523         if (s->main_pid == pid) {
1524
1525                 exec_status_fill(&s->main_exec_status, pid, code, status);
1526                 s->main_pid = 0;
1527
1528                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1529                         assert(s->exec_command[SERVICE_EXEC_START]);
1530                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1531                 }
1532
1533                 log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1534
1535                 /* The service exited, so the service is officially
1536                  * gone. */
1537
1538                 switch (s->state) {
1539
1540                 case SERVICE_START_POST:
1541                 case SERVICE_RELOAD:
1542                 case SERVICE_STOP:
1543                         /* Need to wait until the operation is
1544                          * done */
1545                         break;
1546
1547                 case SERVICE_START:
1548                         assert(s->type == SERVICE_FINISH);
1549
1550                         /* This was our main goal, so let's go on */
1551                         if (success)
1552                                 service_enter_start_post(s);
1553                         else
1554                                 service_enter_stop(s, false);
1555                         break;
1556
1557                 case SERVICE_RUNNING:
1558                         service_enter_stop(s, success);
1559                         break;
1560
1561                 case SERVICE_STOP_SIGTERM:
1562                 case SERVICE_STOP_SIGKILL:
1563
1564                         if (!control_pid_good(s))
1565                                 service_enter_stop_post(s, success);
1566
1567                         /* If there is still a control process, wait for that first */
1568                         break;
1569
1570                 default:
1571                         assert_not_reached("Uh, main process died at wrong time.");
1572                 }
1573
1574         } else if (s->control_pid == pid) {
1575                 assert(s->control_command);
1576
1577                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1578                 s->control_pid = 0;
1579
1580                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1581
1582                 /* If we are shutting things down anyway we
1583                  * don't care about failing commands. */
1584
1585                 if (s->control_command->command_next &&
1586                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1587
1588                         /* There is another command to *
1589                          * execute, so let's do that. */
1590
1591                         service_run_next(s, success);
1592
1593                 else {
1594                         /* No further commands for this step, so let's
1595                          * figure out what to do next */
1596
1597                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1598
1599                         switch (s->state) {
1600
1601                         case SERVICE_START_PRE:
1602                                 if (success)
1603                                         service_enter_start(s);
1604                                 else
1605                                         service_enter_stop(s, false);
1606                                 break;
1607
1608                         case SERVICE_START:
1609                                 assert(s->type == SERVICE_FORKING);
1610
1611                                 /* Let's try to load the pid
1612                                  * file here if we can. We
1613                                  * ignore the return value,
1614                                  * since the PID file might
1615                                  * actually be created by a
1616                                  * START_POST script */
1617
1618                                 if (success) {
1619                                         if (s->pid_file)
1620                                                 service_load_pid_file(s);
1621
1622                                         service_enter_start_post(s);
1623                                 } else
1624                                         service_enter_stop(s, false);
1625
1626                                 break;
1627
1628                         case SERVICE_START_POST:
1629                                 if (success && s->pid_file && !s->main_pid_known) {
1630                                         int r;
1631
1632                                         /* Hmm, let's see if we can
1633                                          * load the pid now after the
1634                                          * start-post scripts got
1635                                          * executed. */
1636
1637                                         if ((r = service_load_pid_file(s)) < 0)
1638                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1639                                 }
1640
1641                                 /* Fall through */
1642
1643                         case SERVICE_RELOAD:
1644                                 if (success) {
1645                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1646                                                 service_set_state(s, SERVICE_RUNNING);
1647                                         else
1648                                                 service_enter_stop(s, true);
1649                                 } else
1650                                         service_enter_stop(s, false);
1651
1652                                 break;
1653
1654                         case SERVICE_STOP:
1655                                 if (main_pid_good(s) > 0)
1656                                         /* Still not dead and we know the PID? Let's go hunting. */
1657                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1658                                 else
1659                                         service_enter_stop_post(s, success);
1660                                 break;
1661
1662                         case SERVICE_STOP_SIGTERM:
1663                         case SERVICE_STOP_SIGKILL:
1664                                 if (main_pid_good(s) <= 0)
1665                                         service_enter_stop_post(s, success);
1666
1667                                 /* If there is still a service
1668                                  * process around, wait until
1669                                  * that one quit, too */
1670                                 break;
1671
1672                         case SERVICE_STOP_POST:
1673                         case SERVICE_FINAL_SIGTERM:
1674                         case SERVICE_FINAL_SIGKILL:
1675                                 service_enter_dead(s, success, true);
1676                                 break;
1677
1678                         default:
1679                                 assert_not_reached("Uh, control process died at wrong time.");
1680                         }
1681                 }
1682         } else
1683                 assert_not_reached("Got SIGCHLD for unkown PID");
1684 }
1685
1686 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1687         Service *s = SERVICE(u);
1688
1689         assert(s);
1690         assert(elapsed == 1);
1691
1692         assert(w == &s->timer_watch);
1693
1694         switch (s->state) {
1695
1696         case SERVICE_START_PRE:
1697         case SERVICE_START:
1698         case SERVICE_START_POST:
1699         case SERVICE_RELOAD:
1700                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1701                 service_enter_stop(s, false);
1702                 break;
1703
1704         case SERVICE_STOP:
1705                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1706                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1707                 break;
1708
1709         case SERVICE_STOP_SIGTERM:
1710                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1711                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1712                 break;
1713
1714         case SERVICE_STOP_SIGKILL:
1715                 /* Uh, wie sent a SIGKILL and it is still not gone?
1716                  * Must be something we cannot kill, so let's just be
1717                  * weirded out and continue */
1718
1719                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1720                 service_enter_stop_post(s, false);
1721                 break;
1722
1723         case SERVICE_STOP_POST:
1724                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1725                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1726                 break;
1727
1728         case SERVICE_FINAL_SIGTERM:
1729                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1730                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1731                 break;
1732
1733         case SERVICE_FINAL_SIGKILL:
1734                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1735                 service_enter_dead(s, false, true);
1736                 break;
1737
1738         case SERVICE_AUTO_RESTART:
1739                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1740                 service_enter_restart(s);
1741                 break;
1742
1743         default:
1744                 assert_not_reached("Timeout at wrong time.");
1745         }
1746 }
1747
1748 static void service_cgroup_notify_event(Unit *u) {
1749         Service *s = SERVICE(u);
1750
1751         assert(u);
1752
1753         log_debug("%s: cgroup is empty", unit_id(u));
1754
1755         switch (s->state) {
1756
1757                 /* Waiting for SIGCHLD is usually more interesting,
1758                  * because it includes return codes/signals. Which is
1759                  * why we ignore the cgroup events for most cases,
1760                  * except when we don't know pid which to expect the
1761                  * SIGCHLD for. */
1762
1763         case SERVICE_RUNNING:
1764
1765                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1766                         service_enter_stop(s, true);
1767
1768                 break;
1769
1770         default:
1771                 ;
1772         }
1773 }
1774
1775 static int service_enumerate(Manager *m) {
1776         char **p;
1777         unsigned i;
1778         DIR *d = NULL;
1779         char *path = NULL, *fpath = NULL, *name = NULL;
1780         int r;
1781
1782         assert(m);
1783
1784         STRV_FOREACH(p, m->sysvrcnd_path)
1785                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1786                         struct dirent *de;
1787
1788                         free(path);
1789                         path = NULL;
1790                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1791                                 r = -ENOMEM;
1792                                 goto finish;
1793                         }
1794
1795                         if (d)
1796                                 closedir(d);
1797
1798                         if (!(d = opendir(path))) {
1799                                 if (errno != ENOENT)
1800                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1801
1802                                 continue;
1803                         }
1804
1805                         while ((de = readdir(d))) {
1806                                 Unit *runlevel, *service;
1807
1808                                 if (ignore_file(de->d_name))
1809                                         continue;
1810
1811                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1812                                         continue;
1813
1814                                 if (strlen(de->d_name) < 4)
1815                                         continue;
1816
1817                                 free(fpath);
1818                                 fpath = NULL;
1819                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1820                                         r = -ENOMEM;
1821                                         goto finish;
1822                                 }
1823
1824                                 if (access(fpath, X_OK) < 0) {
1825
1826                                         if (errno != ENOENT)
1827                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1828
1829                                         continue;
1830                                 }
1831
1832                                 free(name);
1833                                 name = NULL;
1834                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1835                                         r = -ENOMEM;
1836                                         goto finish;
1837                                 }
1838
1839                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1840                                         goto finish;
1841
1842                                 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1843                                         goto finish;
1844
1845                                 if (de->d_name[0] == 'S') {
1846                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1847                                                 goto finish;
1848
1849                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1850                                                 goto finish;
1851
1852                                 } else if (de->d_name[0] == 'K' &&
1853                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1854                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1855
1856                                         /* We honour K links only for
1857                                          * halt/reboot. For the normal
1858                                          * runlevels we assume the
1859                                          * stop jobs will be
1860                                          * implicitly added by the
1861                                          * core logic. */
1862
1863                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1864                                                 goto finish;
1865
1866                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1867                                                 goto finish;
1868                                 }
1869                         }
1870                 }
1871
1872         r = 0;
1873
1874 finish:
1875         free(path);
1876         free(fpath);
1877         free(name);
1878         closedir(d);
1879
1880         return r;
1881 }
1882
1883 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1884         [SERVICE_DEAD] = "dead",
1885         [SERVICE_START_PRE] = "start-pre",
1886         [SERVICE_START] = "start",
1887         [SERVICE_START_POST] = "start-post",
1888         [SERVICE_RUNNING] = "running",
1889         [SERVICE_RELOAD] = "reload",
1890         [SERVICE_STOP] = "stop",
1891         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1892         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1893         [SERVICE_STOP_POST] = "stop-post",
1894         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1895         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1896         [SERVICE_MAINTAINANCE] = "maintainance",
1897         [SERVICE_AUTO_RESTART] = "auto-restart",
1898 };
1899
1900 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1901
1902 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1903         [SERVICE_ONCE] = "once",
1904         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1905         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1906 };
1907
1908 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1909
1910 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1911         [SERVICE_FORKING] = "forking",
1912         [SERVICE_SIMPLE] = "simple",
1913         [SERVICE_FINISH] = "finish"
1914 };
1915
1916 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1917
1918 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1919         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1920         [SERVICE_EXEC_START] = "ExecStart",
1921         [SERVICE_EXEC_START_POST] = "ExecStartPost",
1922         [SERVICE_EXEC_RELOAD] = "ExecReload",
1923         [SERVICE_EXEC_STOP] = "ExecStop",
1924         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1925 };
1926
1927 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1928
1929 const UnitVTable service_vtable = {
1930         .suffix = ".service",
1931
1932         .init = service_init,
1933         .done = service_done,
1934
1935         .dump = service_dump,
1936
1937         .start = service_start,
1938         .stop = service_stop,
1939         .reload = service_reload,
1940
1941         .can_reload = service_can_reload,
1942
1943         .active_state = service_active_state,
1944
1945         .sigchld_event = service_sigchld_event,
1946         .timer_event = service_timer_event,
1947
1948         .cgroup_notify_empty = service_cgroup_notify_event,
1949
1950         .enumerate = service_enumerate
1951 };