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         s->valid_no_process = false;
 704         s->kill_mode = 0;
 705         s->sysv_has_lsb = false;
 706         s->main_pid = s->control_pid = 0;
 707         s->main_pid_known = false;
 708         s->failure = false;
 709
 710         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 711
 712         /* Load a .service file */
 713         if ((r = unit_load_fragment(u, new_state)) < 0)
 714                 return r;
 715
 716         /* Load a classic init script as a fallback, if we couldn't find anything */
 717         if (*new_state == UNIT_STUB)
 718                 if ((r = service_load_sysv(s, new_state)) < 0)
 719                         return r;
 720
 721         /* Still nothing found? Then let's give up */
 722         if (*new_state == UNIT_STUB)
 723                 return -ENOENT;
 724
 725         /* We were able to load something, then let's add in the
 726          * dropin directories. */
 727         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 728                 return r;
 729
 730         /* This is a new unit? Then let's add in some extras */
 731         if (*new_state == UNIT_LOADED) {
 732                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 733                         return r;
 734
 735                 if ((r = unit_add_default_cgroup(u)) < 0)
 736                         return r;
 737
 738                 if ((r = sysv_chkconfig_order(s)) < 0)
 739                         return r;
 740         }
 741
 742         return 0;
 743 }
 744
 745 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 746
 747         ServiceExecCommand c;
 748         Service *s = SERVICE(u);
 749         const char *prefix2;
 750         char *p2;
 751
 752         assert(s);
 753
 754         p2 = strappend(prefix, "\t");
 755         prefix2 = p2 ? p2 : prefix;
 756
 757         fprintf(f,
 758                 "%sService State: %s\n"
 759                 "%sPermissionsStartOnly: %s\n"
 760                 "%sRootDirectoryStartOnly: %s\n"
 761                 "%sValidNoProcess: %s\n"
 762                 "%sKillMode: %s\n"
 763                 "%sType: %s\n",
 764                 prefix, service_state_to_string(s->state),
 765                 prefix, yes_no(s->permissions_start_only),
 766                 prefix, yes_no(s->root_directory_start_only),
 767                 prefix, yes_no(s->valid_no_process),
 768                 prefix, kill_mode_to_string(s->kill_mode),
 769                 prefix, service_type_to_string(s->type));
 770
 771         if (s->control_pid > 0)
 772                 fprintf(f,
 773                         "%sControl PID: %llu\n",
 774                         prefix, (unsigned long long) s->control_pid);
 775
 776         if (s->main_pid > 0)
 777                 fprintf(f,
 778                         "%sMain PID: %llu\n",
 779                         prefix, (unsigned long long) s->main_pid);
 780
 781         if (s->pid_file)
 782                 fprintf(f,
 783                         "%sPIDFile: %s\n",
 784                         prefix, s->pid_file);
 785
 786         exec_context_dump(&s->exec_context, f, prefix);
 787
 788         for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
 789
 790                 if (!s->exec_command[c])
 791                         continue;
 792
 793                 fprintf(f, "%s→ %s:\n",
 794                         prefix, service_exec_command_to_string(c));
 795
 796                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 797         }
 798
 799         if (s->sysv_path)
 800                 fprintf(f,
 801                         "%sSysV Init Script Path: %s\n"
 802                         "%sSysV Init Script has LSB Header: %s\n",
 803                         prefix, s->sysv_path,
 804                         prefix, yes_no(s->sysv_has_lsb));
 805
 806         if (s->sysv_start_priority >= 0)
 807                 fprintf(f,
 808                         "%sSysVStartPriority: %i\n",
 809                         prefix, s->sysv_start_priority);
 810
 811         if (s->sysv_runlevels)
 812                 fprintf(f, "%sSysVRunLevels: %s\n",
 813                         prefix, s->sysv_runlevels);
 814
 815         free(p2);
 816 }
 817
 818 static int service_load_pid_file(Service *s) {
 819         char *k;
 820         unsigned long p;
 821         int r;
 822
 823         assert(s);
 824
 825         if (s->main_pid_known)
 826                 return 0;
 827
 828         if (!s->pid_file)
 829                 return -ENOENT;
 830
 831         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 832                 return r;
 833
 834         if ((r = safe_atolu(k, &p)) < 0) {
 835                 free(k);
 836                 return r;
 837         }
 838
 839         if ((unsigned long) (pid_t) p != p)
 840                 return -ERANGE;
 841
 842         s->main_pid = p;
 843         s->main_pid_known = true;
 844
 845         return 0;
 846 }
 847
 848 static int service_get_sockets(Service *s, Set **_set) {
 849         Set *set;
 850         Iterator i;
 851         char *t;
 852         int r;
 853
 854         assert(s);
 855         assert(_set);
 856
 857         /* Collects all Socket objects that belong to this
 858          * service. Note that a service might have multiple sockets
 859          * via multiple names. */
 860
 861         if (!(set = set_new(NULL, NULL)))
 862                 return -ENOMEM;
 863
 864         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 865                 char *k;
 866                 Unit *p;
 867
 868                 /* Look for all socket objects that go by any of our
 869                  * units and collect their fds */
 870
 871                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 872                         r = -ENOMEM;
 873                         goto fail;
 874                 }
 875
 876                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 877                 free(k);
 878
 879                 if (!p) continue;
 880
 881                 if ((r = set_put(set, p)) < 0)
 882                         goto fail;
 883         }
 884
 885         *_set = set;
 886         return 0;
 887
 888 fail:
 889         set_free(set);
 890         return r;
 891 }
 892
 893
 894 static int service_notify_sockets(Service *s) {
 895         Iterator i;
 896         Set *set;
 897         Socket *sock;
 898         int r;
 899
 900         assert(s);
 901
 902         /* Notifies all our sockets when we die */
 903
 904         if ((r = service_get_sockets(s, &set)) < 0)
 905                 return r;
 906
 907         SET_FOREACH(sock, set, i)
 908                 socket_notify_service_dead(sock);
 909
 910         set_free(set);
 911
 912         return 0;
 913 }
 914
 915 static void service_set_state(Service *s, ServiceState state) {
 916         ServiceState old_state;
 917         assert(s);
 918
 919         old_state = s->state;
 920         s->state = state;
 921
 922         if (state != SERVICE_START_PRE &&
 923             state != SERVICE_START &&
 924             state != SERVICE_START_POST &&
 925             state != SERVICE_RELOAD &&
 926             state != SERVICE_STOP &&
 927             state != SERVICE_STOP_SIGTERM &&
 928             state != SERVICE_STOP_SIGKILL &&
 929             state != SERVICE_STOP_POST &&
 930             state != SERVICE_FINAL_SIGTERM &&
 931             state != SERVICE_FINAL_SIGKILL &&
 932             state != SERVICE_AUTO_RESTART)
 933                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 934
 935         if (state != SERVICE_START &&
 936             state != SERVICE_START_POST &&
 937             state != SERVICE_RUNNING &&
 938             state != SERVICE_RELOAD &&
 939             state != SERVICE_STOP &&
 940             state != SERVICE_STOP_SIGTERM &&
 941             state != SERVICE_STOP_SIGKILL)
 942                 if (s->main_pid > 0) {
 943                         unit_unwatch_pid(UNIT(s), s->main_pid);
 944                         s->main_pid = 0;
 945                 }
 946
 947         if (state != SERVICE_START_PRE &&
 948             state != SERVICE_START &&
 949             state != SERVICE_START_POST &&
 950             state != SERVICE_RELOAD &&
 951             state != SERVICE_STOP &&
 952             state != SERVICE_STOP_SIGTERM &&
 953             state != SERVICE_STOP_SIGKILL &&
 954             state != SERVICE_STOP_POST &&
 955             state != SERVICE_FINAL_SIGTERM &&
 956             state != SERVICE_FINAL_SIGKILL)
 957                 if (s->control_pid > 0) {
 958                         unit_unwatch_pid(UNIT(s), s->control_pid);
 959                         s->control_pid = 0;
 960                 }
 961
 962         if (state != SERVICE_START_PRE &&
 963             state != SERVICE_START &&
 964             state != SERVICE_START_POST &&
 965             state != SERVICE_RELOAD &&
 966             state != SERVICE_STOP &&
 967             state != SERVICE_STOP_POST)
 968                 s->control_command = NULL;
 969
 970         if (state == SERVICE_DEAD ||
 971             state == SERVICE_STOP ||
 972             state == SERVICE_STOP_SIGTERM ||
 973             state == SERVICE_STOP_SIGKILL ||
 974             state == SERVICE_STOP_POST ||
 975             state == SERVICE_FINAL_SIGTERM ||
 976             state == SERVICE_FINAL_SIGKILL ||
 977             state == SERVICE_MAINTAINANCE ||
 978             state == SERVICE_AUTO_RESTART)
 979                 service_notify_sockets(s);
 980
 981         if (old_state == state)
 982                 return;
 983
 984         log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 985
 986         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 987 }
 988
 989 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
 990         Iterator i;
 991         int r;
 992         int *rfds = NULL;
 993         unsigned rn_fds = 0;
 994         Set *set;
 995         Socket *sock;
 996
 997         assert(s);
 998         assert(fds);
 999         assert(n_fds);
1000
1001         if ((r = service_get_sockets(s, &set)) < 0)
1002                 return r;
1003
1004         SET_FOREACH(sock, set, i) {
1005                 int *cfds;
1006                 unsigned cn_fds;
1007
1008                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1009                         goto fail;
1010
1011                 if (!cfds)
1012                         continue;
1013
1014                 if (!rfds) {
1015                         rfds = cfds;
1016                         rn_fds = cn_fds;
1017                 } else {
1018                         int *t;
1019
1020                         if (!(t = new(int, rn_fds+cn_fds))) {
1021                                 free(cfds);
1022                                 r = -ENOMEM;
1023                                 goto fail;
1024                         }
1025
1026                         memcpy(t, rfds, rn_fds);
1027                         memcpy(t+rn_fds, cfds, cn_fds);
1028                         free(rfds);
1029                         free(cfds);
1030
1031                         rfds = t;
1032                         rn_fds = rn_fds+cn_fds;
1033                 }
1034         }
1035
1036         *fds = rfds;
1037         *n_fds = rn_fds;
1038
1039         set_free(set);
1040
1041         return 0;
1042
1043 fail:
1044         set_free(set);
1045         free(rfds);
1046
1047         return r;
1048 }
1049
1050 static int service_spawn(
1051                 Service *s,
1052                 ExecCommand *c,
1053                 bool timeout,
1054                 bool pass_fds,
1055                 bool apply_permissions,
1056                 bool apply_chroot,
1057                 pid_t *_pid) {
1058
1059         pid_t pid;
1060         int r;
1061         int *fds = NULL;
1062         unsigned n_fds = 0;
1063
1064         assert(s);
1065         assert(c);
1066         assert(_pid);
1067
1068         if (pass_fds)
1069                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1070                         goto fail;
1071
1072         if (timeout) {
1073                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1074                         goto fail;
1075         } else
1076                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1077
1078         if ((r = exec_spawn(c,
1079                             &s->exec_context,
1080                             fds, n_fds,
1081                             apply_permissions,
1082                             apply_chroot,
1083                             UNIT(s)->meta.cgroup_bondings,
1084                             &pid)) < 0)
1085                 goto fail;
1086
1087         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1088                 /* FIXME: we need to do something here */
1089                 goto fail;
1090
1091         free(fds);
1092         *_pid = pid;
1093
1094         return 0;
1095
1096 fail:
1097         free(fds);
1098
1099         if (timeout)
1100                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1101
1102         return r;
1103 }
1104
1105 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1106         int r;
1107         assert(s);
1108
1109         if (!success)
1110                 s->failure = true;
1111
1112         if (allow_restart &&
1113             (s->restart == SERVICE_RESTART_ALWAYS ||
1114              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1115
1116                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1117                         goto fail;
1118
1119                 service_set_state(s, SERVICE_AUTO_RESTART);
1120         } else
1121                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1122
1123         return;
1124
1125 fail:
1126         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1127         service_enter_dead(s, false, false);
1128 }
1129
1130 static void service_enter_signal(Service *s, ServiceState state, bool success);
1131
1132 static void service_enter_stop_post(Service *s, bool success) {
1133         int r;
1134         assert(s);
1135
1136         if (!success)
1137                 s->failure = true;
1138
1139         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1140                 if ((r = service_spawn(s,
1141                                        s->control_command,
1142                                        true,
1143                                        false,
1144                                        !s->permissions_start_only,
1145                                        !s->root_directory_start_only,
1146                                        &s->control_pid)) < 0)
1147                         goto fail;
1148
1149
1150         service_set_state(s, SERVICE_STOP_POST);
1151
1152         if (!s->control_command)
1153                 service_enter_dead(s, true, true);
1154
1155         return;
1156
1157 fail:
1158         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1159         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1160 }
1161
1162 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1163         int r;
1164         bool sent = false;
1165
1166         assert(s);
1167
1168         if (!success)
1169                 s->failure = true;
1170
1171         if (s->main_pid > 0 || s->control_pid > 0) {
1172                 int sig;
1173
1174                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1175
1176                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1177
1178                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1179                                 if (r != -EAGAIN && r != -ESRCH)
1180                                         goto fail;
1181                         } else
1182                                 sent = true;
1183                 }
1184
1185                 if (!sent) {
1186                         r = 0;
1187                         if (s->main_pid > 0) {
1188                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1189                                         r = -errno;
1190                                 else
1191                                         sent = true;
1192                         }
1193
1194                         if (s->control_pid > 0) {
1195                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1196                                         r = -errno;
1197                                 else
1198                                         sent = true;
1199                         }
1200
1201                         if (r < 0)
1202                                 goto fail;
1203                 }
1204         }
1205
1206         service_set_state(s, state);
1207
1208         if (s->main_pid <= 0 && s->control_pid <= 0)
1209                 service_enter_dead(s, true, true);
1210
1211         return;
1212
1213 fail:
1214         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1215
1216         if (sent)  {
1217                 s->failure = true;
1218                 service_set_state(s, state);
1219         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1220                 service_enter_stop_post(s, false);
1221         else
1222                 service_enter_dead(s, false, true);
1223 }
1224
1225 static void service_enter_stop(Service *s, bool success) {
1226         int r;
1227         assert(s);
1228
1229         if (!success)
1230                 s->failure = true;
1231
1232         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1233                 if ((r = service_spawn(s,
1234                                        s->control_command,
1235                                        true,
1236                                        false,
1237                                        !s->permissions_start_only,
1238                                        !s->root_directory_start_only,
1239                                        &s->control_pid)) < 0)
1240                         goto fail;
1241
1242         service_set_state(s, SERVICE_STOP);
1243
1244         if (!s->control_command)
1245                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1246
1247         return;
1248
1249 fail:
1250         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1251         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1252 }
1253
1254 static void service_enter_start_post(Service *s) {
1255         int r;
1256         assert(s);
1257
1258         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1259                 if ((r = service_spawn(s,
1260                                        s->control_command,
1261                                        true,
1262                                        false,
1263                                        !s->permissions_start_only,
1264                                        !s->root_directory_start_only,
1265                                        &s->control_pid)) < 0)
1266                         goto fail;
1267
1268
1269         service_set_state(s, SERVICE_START_POST);
1270
1271         if (!s->control_command)
1272                 service_set_state(s, SERVICE_RUNNING);
1273
1274         return;
1275
1276 fail:
1277         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1278         service_enter_stop(s, false);
1279 }
1280
1281 static void service_enter_start(Service *s) {
1282         pid_t pid;
1283         int r;
1284
1285         assert(s);
1286
1287         assert(s->exec_command[SERVICE_EXEC_START]);
1288         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1289
1290         if ((r = service_spawn(s,
1291                                s->exec_command[SERVICE_EXEC_START],
1292                                s->type == SERVICE_FORKING,
1293                                true,
1294                                true,
1295                                true,
1296                                &pid)) < 0)
1297                 goto fail;
1298
1299         service_set_state(s, SERVICE_START);
1300
1301         if (s->type == SERVICE_SIMPLE) {
1302                 /* For simple services we immediately start
1303                  * the START_POST binaries. */
1304
1305                 s->main_pid = pid;
1306                 s->main_pid_known = true;
1307                 service_enter_start_post(s);
1308
1309         } else  if (s->type == SERVICE_FORKING) {
1310
1311                 /* For forking services we wait until the start
1312                  * process exited. */
1313
1314                 s->control_pid = pid;
1315                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1316         } else if (s->type == SERVICE_FINISH) {
1317
1318                 /* For finishing services we wait until the start
1319                  * process exited, too, but it is our main process. */
1320
1321                 s->main_pid = pid;
1322                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1323         } else
1324                 assert_not_reached("Unknown service type");
1325
1326         return;
1327
1328 fail:
1329         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1330         service_enter_stop(s, false);
1331 }
1332
1333 static void service_enter_start_pre(Service *s) {
1334         int r;
1335
1336         assert(s);
1337
1338         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1339                 if ((r = service_spawn(s,
1340                                        s->control_command,
1341                                        true,
1342                                        false,
1343                                        !s->permissions_start_only,
1344                                        !s->root_directory_start_only,
1345                                        &s->control_pid)) < 0)
1346                         goto fail;
1347
1348         service_set_state(s, SERVICE_START_PRE);
1349
1350         if (!s->control_command)
1351                 service_enter_start(s);
1352
1353         return;
1354
1355 fail:
1356         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1357         service_enter_dead(s, false, true);
1358 }
1359
1360 static void service_enter_restart(Service *s) {
1361         int r;
1362         assert(s);
1363
1364         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1365                 goto fail;
1366
1367         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1368         service_enter_dead(s, true, false);
1369         return;
1370
1371 fail:
1372
1373         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1374         service_enter_dead(s, false, false);
1375 }
1376
1377 static void service_enter_reload(Service *s) {
1378         int r;
1379
1380         assert(s);
1381
1382         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1383                 if ((r = service_spawn(s,
1384                                        s->control_command,
1385                                        true,
1386                                        false,
1387                                        !s->permissions_start_only,
1388                                        !s->root_directory_start_only,
1389                                        &s->control_pid)) < 0)
1390                         goto fail;
1391
1392         service_set_state(s, SERVICE_RELOAD);
1393
1394         if (!s->control_command)
1395                 service_set_state(s, SERVICE_RUNNING);
1396
1397         return;
1398
1399 fail:
1400         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1401         service_enter_stop(s, false);
1402 }
1403
1404 static void service_run_next(Service *s, bool success) {
1405         int r;
1406
1407         assert(s);
1408         assert(s->control_command);
1409         assert(s->control_command->command_next);
1410
1411         if (!success)
1412                 s->failure = true;
1413
1414         s->control_command = s->control_command->command_next;
1415
1416         if ((r = service_spawn(s,
1417                                s->control_command,
1418                                true,
1419                                false,
1420                                !s->permissions_start_only,
1421                                !s->root_directory_start_only,
1422                                &s->control_pid)) < 0)
1423                 goto fail;
1424
1425         return;
1426
1427 fail:
1428         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1429
1430         if (s->state == SERVICE_STOP)
1431                 service_enter_stop_post(s, false);
1432         else if (s->state == SERVICE_STOP_POST)
1433                 service_enter_dead(s, false, true);
1434         else
1435                 service_enter_stop(s, false);
1436 }
1437
1438 static int service_start(Unit *u) {
1439         Service *s = SERVICE(u);
1440
1441         assert(s);
1442
1443         /* We cannot fulfill this request right now, try again later
1444          * please! */
1445         if (s->state == SERVICE_STOP ||
1446             s->state == SERVICE_STOP_SIGTERM ||
1447             s->state == SERVICE_STOP_SIGKILL ||
1448             s->state == SERVICE_STOP_POST ||
1449             s->state == SERVICE_FINAL_SIGTERM ||
1450             s->state == SERVICE_FINAL_SIGKILL)
1451                 return -EAGAIN;
1452
1453         /* Already on it! */
1454         if (s->state == SERVICE_START_PRE ||
1455             s->state == SERVICE_START ||
1456             s->state == SERVICE_START_POST)
1457                 return 0;
1458
1459         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1460
1461         /* Make sure we don't enter a busy loop of some kind. */
1462         if (!ratelimit_test(&s->ratelimit)) {
1463                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1464                 return -EAGAIN;
1465         }
1466
1467         s->failure = false;
1468         s->main_pid_known = false;
1469
1470         service_enter_start_pre(s);
1471         return 0;
1472 }
1473
1474 static int service_stop(Unit *u) {
1475         Service *s = SERVICE(u);
1476
1477         assert(s);
1478
1479         if (s->state == SERVICE_START_PRE ||
1480             s->state == SERVICE_START ||
1481             s->state == SERVICE_START_POST ||
1482             s->state == SERVICE_RELOAD)
1483                 return -EAGAIN;
1484
1485         if (s->state == SERVICE_AUTO_RESTART) {
1486                 service_set_state(s, SERVICE_DEAD);
1487                 return 0;
1488         }
1489
1490         assert(s->state == SERVICE_RUNNING);
1491
1492         service_enter_stop(s, true);
1493         return 0;
1494 }
1495
1496 static int service_reload(Unit *u) {
1497         Service *s = SERVICE(u);
1498
1499         assert(s);
1500
1501         assert(s->state == SERVICE_RUNNING);
1502
1503         service_enter_reload(s);
1504         return 0;
1505 }
1506
1507 static bool service_can_reload(Unit *u) {
1508         Service *s = SERVICE(u);
1509
1510         assert(s);
1511
1512         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1513 }
1514
1515 static UnitActiveState service_active_state(Unit *u) {
1516         assert(u);
1517
1518         return state_translation_table[SERVICE(u)->state];
1519 }
1520
1521 static int main_pid_good(Service *s) {
1522         assert(s);
1523
1524         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1525          * don't know */
1526
1527         /* If we know the pid file, then lets just check if it is
1528          * still valid */
1529         if (s->main_pid_known)
1530                 return s->main_pid > 0;
1531
1532         /* We don't know the pid */
1533         return -EAGAIN;
1534 }
1535
1536 static bool control_pid_good(Service *s) {
1537         assert(s);
1538
1539         return s->control_pid > 0;
1540 }
1541
1542 static int cgroup_good(Service *s) {
1543         assert(s);
1544
1545         if (s->valid_no_process)
1546                 return -EAGAIN;
1547
1548         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1549 }
1550
1551 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1552         Service *s = SERVICE(u);
1553         bool success;
1554
1555         assert(s);
1556         assert(pid >= 0);
1557
1558         success = code == CLD_EXITED && status == 0;
1559         s->failure = s->failure || !success;
1560
1561         if (s->main_pid == pid) {
1562
1563                 exec_status_fill(&s->main_exec_status, pid, code, status);
1564                 s->main_pid = 0;
1565
1566                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1567                         assert(s->exec_command[SERVICE_EXEC_START]);
1568                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1569                 }
1570
1571                 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
1572
1573                 /* The service exited, so the service is officially
1574                  * gone. */
1575
1576                 switch (s->state) {
1577
1578                 case SERVICE_START_POST:
1579                 case SERVICE_RELOAD:
1580                 case SERVICE_STOP:
1581                         /* Need to wait until the operation is
1582                          * done */
1583                         break;
1584
1585                 case SERVICE_START:
1586                         assert(s->type == SERVICE_FINISH);
1587
1588                         /* This was our main goal, so let's go on */
1589                         if (success)
1590                                 service_enter_start_post(s);
1591                         else
1592                                 service_enter_stop(s, false);
1593                         break;
1594
1595                 case SERVICE_RUNNING:
1596                         service_enter_stop(s, success);
1597                         break;
1598
1599                 case SERVICE_STOP_SIGTERM:
1600                 case SERVICE_STOP_SIGKILL:
1601
1602                         if (!control_pid_good(s))
1603                                 service_enter_stop_post(s, success);
1604
1605                         /* If there is still a control process, wait for that first */
1606                         break;
1607
1608                 default:
1609                         assert_not_reached("Uh, main process died at wrong time.");
1610                 }
1611
1612         } else if (s->control_pid == pid) {
1613                 assert(s->control_command);
1614
1615                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1616                 s->control_pid = 0;
1617
1618                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1619
1620                 /* If we are shutting things down anyway we
1621                  * don't care about failing commands. */
1622
1623                 if (s->control_command->command_next &&
1624                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1625
1626                         /* There is another command to *
1627                          * execute, so let's do that. */
1628
1629                         service_run_next(s, success);
1630
1631                 else {
1632                         /* No further commands for this step, so let's
1633                          * figure out what to do next */
1634
1635                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1636
1637                         switch (s->state) {
1638
1639                         case SERVICE_START_PRE:
1640                                 if (success)
1641                                         service_enter_start(s);
1642                                 else
1643                                         service_enter_stop(s, false);
1644                                 break;
1645
1646                         case SERVICE_START:
1647                                 assert(s->type == SERVICE_FORKING);
1648
1649                                 /* Let's try to load the pid
1650                                  * file here if we can. We
1651                                  * ignore the return value,
1652                                  * since the PID file might
1653                                  * actually be created by a
1654                                  * START_POST script */
1655
1656                                 if (success) {
1657                                         if (s->pid_file)
1658                                                 service_load_pid_file(s);
1659
1660                                         service_enter_start_post(s);
1661                                 } else
1662                                         service_enter_stop(s, false);
1663
1664                                 break;
1665
1666                         case SERVICE_START_POST:
1667                                 if (success && s->pid_file && !s->main_pid_known) {
1668                                         int r;
1669
1670                                         /* Hmm, let's see if we can
1671                                          * load the pid now after the
1672                                          * start-post scripts got
1673                                          * executed. */
1674
1675                                         if ((r = service_load_pid_file(s)) < 0)
1676                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1677                                 }
1678
1679                                 /* Fall through */
1680
1681                         case SERVICE_RELOAD:
1682                                 if (success) {
1683                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1684                                                 service_set_state(s, SERVICE_RUNNING);
1685                                         else
1686                                                 service_enter_stop(s, true);
1687                                 } else
1688                                         service_enter_stop(s, false);
1689
1690                                 break;
1691
1692                         case SERVICE_STOP:
1693                                 if (main_pid_good(s) > 0)
1694                                         /* Still not dead and we know the PID? Let's go hunting. */
1695                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1696                                 else
1697                                         service_enter_stop_post(s, success);
1698                                 break;
1699
1700                         case SERVICE_STOP_SIGTERM:
1701                         case SERVICE_STOP_SIGKILL:
1702                                 if (main_pid_good(s) <= 0)
1703                                         service_enter_stop_post(s, success);
1704
1705                                 /* If there is still a service
1706                                  * process around, wait until
1707                                  * that one quit, too */
1708                                 break;
1709
1710                         case SERVICE_STOP_POST:
1711                         case SERVICE_FINAL_SIGTERM:
1712                         case SERVICE_FINAL_SIGKILL:
1713                                 service_enter_dead(s, success, true);
1714                                 break;
1715
1716                         default:
1717                                 assert_not_reached("Uh, control process died at wrong time.");
1718                         }
1719                 }
1720         } else
1721                 assert_not_reached("Got SIGCHLD for unkown PID");
1722 }
1723
1724 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1725         Service *s = SERVICE(u);
1726
1727         assert(s);
1728         assert(elapsed == 1);
1729
1730         assert(w == &s->timer_watch);
1731
1732         switch (s->state) {
1733
1734         case SERVICE_START_PRE:
1735         case SERVICE_START:
1736         case SERVICE_START_POST:
1737         case SERVICE_RELOAD:
1738                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1739                 service_enter_stop(s, false);
1740                 break;
1741
1742         case SERVICE_STOP:
1743                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1744                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1745                 break;
1746
1747         case SERVICE_STOP_SIGTERM:
1748                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1749                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1750                 break;
1751
1752         case SERVICE_STOP_SIGKILL:
1753                 /* Uh, wie sent a SIGKILL and it is still not gone?
1754                  * Must be something we cannot kill, so let's just be
1755                  * weirded out and continue */
1756
1757                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1758                 service_enter_stop_post(s, false);
1759                 break;
1760
1761         case SERVICE_STOP_POST:
1762                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1763                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1764                 break;
1765
1766         case SERVICE_FINAL_SIGTERM:
1767                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1768                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1769                 break;
1770
1771         case SERVICE_FINAL_SIGKILL:
1772                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1773                 service_enter_dead(s, false, true);
1774                 break;
1775
1776         case SERVICE_AUTO_RESTART:
1777                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1778                 service_enter_restart(s);
1779                 break;
1780
1781         default:
1782                 assert_not_reached("Timeout at wrong time.");
1783         }
1784 }
1785
1786 static void service_cgroup_notify_event(Unit *u) {
1787         Service *s = SERVICE(u);
1788
1789         assert(u);
1790
1791         log_debug("%s: cgroup is empty", unit_id(u));
1792
1793         switch (s->state) {
1794
1795                 /* Waiting for SIGCHLD is usually more interesting,
1796                  * because it includes return codes/signals. Which is
1797                  * why we ignore the cgroup events for most cases,
1798                  * except when we don't know pid which to expect the
1799                  * SIGCHLD for. */
1800
1801         case SERVICE_RUNNING:
1802
1803                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1804                         service_enter_stop(s, true);
1805
1806                 break;
1807
1808         default:
1809                 ;
1810         }
1811 }
1812
1813 static int service_enumerate(Manager *m) {
1814         char **p;
1815         unsigned i;
1816         DIR *d = NULL;
1817         char *path = NULL, *fpath = NULL, *name = NULL;
1818         int r;
1819
1820         assert(m);
1821
1822         STRV_FOREACH(p, m->sysvrcnd_path)
1823                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1824                         struct dirent *de;
1825
1826                         free(path);
1827                         path = NULL;
1828                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1829                                 r = -ENOMEM;
1830                                 goto finish;
1831                         }
1832
1833                         if (d)
1834                                 closedir(d);
1835
1836                         if (!(d = opendir(path))) {
1837                                 if (errno != ENOENT)
1838                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1839
1840                                 continue;
1841                         }
1842
1843                         while ((de = readdir(d))) {
1844                                 Unit *runlevel, *service;
1845
1846                                 if (ignore_file(de->d_name))
1847                                         continue;
1848
1849                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1850                                         continue;
1851
1852                                 if (strlen(de->d_name) < 4)
1853                                         continue;
1854
1855                                 free(fpath);
1856                                 fpath = NULL;
1857                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1858                                         r = -ENOMEM;
1859                                         goto finish;
1860                                 }
1861
1862                                 if (access(fpath, X_OK) < 0) {
1863
1864                                         if (errno != ENOENT)
1865                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1866
1867                                         continue;
1868                                 }
1869
1870                                 free(name);
1871                                 name = NULL;
1872                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1873                                         r = -ENOMEM;
1874                                         goto finish;
1875                                 }
1876
1877                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1878                                         goto finish;
1879
1880                                 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1881                                         goto finish;
1882
1883                                 if (de->d_name[0] == 'S') {
1884                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1885                                                 goto finish;
1886
1887                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1888                                                 goto finish;
1889
1890                                 } else if (de->d_name[0] == 'K' &&
1891                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1892                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1893
1894                                         /* We honour K links only for
1895                                          * halt/reboot. For the normal
1896                                          * runlevels we assume the
1897                                          * stop jobs will be
1898                                          * implicitly added by the
1899                                          * core logic. */
1900
1901                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1902                                                 goto finish;
1903
1904                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1905                                                 goto finish;
1906                                 }
1907                         }
1908                 }
1909
1910         r = 0;
1911
1912 finish:
1913         free(path);
1914         free(fpath);
1915         free(name);
1916         closedir(d);
1917
1918         return r;
1919 }
1920
1921 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1922         [SERVICE_DEAD] = "dead",
1923         [SERVICE_START_PRE] = "start-pre",
1924         [SERVICE_START] = "start",
1925         [SERVICE_START_POST] = "start-post",
1926         [SERVICE_RUNNING] = "running",
1927         [SERVICE_RELOAD] = "reload",
1928         [SERVICE_STOP] = "stop",
1929         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1930         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1931         [SERVICE_STOP_POST] = "stop-post",
1932         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1933         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1934         [SERVICE_MAINTAINANCE] = "maintainance",
1935         [SERVICE_AUTO_RESTART] = "auto-restart",
1936 };
1937
1938 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1939
1940 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1941         [SERVICE_ONCE] = "once",
1942         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1943         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1944 };
1945
1946 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1947
1948 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1949         [SERVICE_FORKING] = "forking",
1950         [SERVICE_SIMPLE] = "simple",
1951         [SERVICE_FINISH] = "finish"
1952 };
1953
1954 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1955
1956 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1957         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1958         [SERVICE_EXEC_START] = "ExecStart",
1959         [SERVICE_EXEC_START_POST] = "ExecStartPost",
1960         [SERVICE_EXEC_RELOAD] = "ExecReload",
1961         [SERVICE_EXEC_STOP] = "ExecStop",
1962         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1963 };
1964
1965 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1966
1967 const UnitVTable service_vtable = {
1968         .suffix = ".service",
1969
1970         .init = service_init,
1971         .done = service_done,
1972
1973         .dump = service_dump,
1974
1975         .start = service_start,
1976         .stop = service_stop,
1977         .reload = service_reload,
1978
1979         .can_reload = service_can_reload,
1980
1981         .active_state = service_active_state,
1982
1983         .sigchld_event = service_sigchld_event,
1984         .timer_event = service_timer_event,
1985
1986         .cgroup_notify_empty = service_cgroup_notify_event,
1987
1988         .enumerate = service_enumerate
1989 };