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         if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
 843                 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
 844                             (unsigned long long) p, s->pid_file);
 845                 return -ESRCH;
 846         }
 847
 848         if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
 849                 /* FIXME: we need to do something here */
 850                 return r;
 851
 852         s->main_pid = (pid_t) p;
 853         s->main_pid_known = true;
 854
 855         return 0;
 856 }
 857
 858 static int service_get_sockets(Service *s, Set **_set) {
 859         Set *set;
 860         Iterator i;
 861         char *t;
 862         int r;
 863
 864         assert(s);
 865         assert(_set);
 866
 867         /* Collects all Socket objects that belong to this
 868          * service. Note that a service might have multiple sockets
 869          * via multiple names. */
 870
 871         if (!(set = set_new(NULL, NULL)))
 872                 return -ENOMEM;
 873
 874         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 875                 char *k;
 876                 Unit *p;
 877
 878                 /* Look for all socket objects that go by any of our
 879                  * units and collect their fds */
 880
 881                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 882                         r = -ENOMEM;
 883                         goto fail;
 884                 }
 885
 886                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 887                 free(k);
 888
 889                 if (!p) continue;
 890
 891                 if ((r = set_put(set, p)) < 0)
 892                         goto fail;
 893         }
 894
 895         *_set = set;
 896         return 0;
 897
 898 fail:
 899         set_free(set);
 900         return r;
 901 }
 902
 903
 904 static int service_notify_sockets(Service *s) {
 905         Iterator i;
 906         Set *set;
 907         Socket *sock;
 908         int r;
 909
 910         assert(s);
 911
 912         /* Notifies all our sockets when we die */
 913
 914         if ((r = service_get_sockets(s, &set)) < 0)
 915                 return r;
 916
 917         SET_FOREACH(sock, set, i)
 918                 socket_notify_service_dead(sock);
 919
 920         set_free(set);
 921
 922         return 0;
 923 }
 924
 925 static void service_set_state(Service *s, ServiceState state) {
 926         ServiceState old_state;
 927         assert(s);
 928
 929         old_state = s->state;
 930         s->state = state;
 931
 932         if (state != SERVICE_START_PRE &&
 933             state != SERVICE_START &&
 934             state != SERVICE_START_POST &&
 935             state != SERVICE_RELOAD &&
 936             state != SERVICE_STOP &&
 937             state != SERVICE_STOP_SIGTERM &&
 938             state != SERVICE_STOP_SIGKILL &&
 939             state != SERVICE_STOP_POST &&
 940             state != SERVICE_FINAL_SIGTERM &&
 941             state != SERVICE_FINAL_SIGKILL &&
 942             state != SERVICE_AUTO_RESTART)
 943                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 944
 945         if (state != SERVICE_START &&
 946             state != SERVICE_START_POST &&
 947             state != SERVICE_RUNNING &&
 948             state != SERVICE_RELOAD &&
 949             state != SERVICE_STOP &&
 950             state != SERVICE_STOP_SIGTERM &&
 951             state != SERVICE_STOP_SIGKILL)
 952                 if (s->main_pid > 0) {
 953                         unit_unwatch_pid(UNIT(s), s->main_pid);
 954                         s->main_pid = 0;
 955                 }
 956
 957         if (state != SERVICE_START_PRE &&
 958             state != SERVICE_START &&
 959             state != SERVICE_START_POST &&
 960             state != SERVICE_RELOAD &&
 961             state != SERVICE_STOP &&
 962             state != SERVICE_STOP_SIGTERM &&
 963             state != SERVICE_STOP_SIGKILL &&
 964             state != SERVICE_STOP_POST &&
 965             state != SERVICE_FINAL_SIGTERM &&
 966             state != SERVICE_FINAL_SIGKILL)
 967                 if (s->control_pid > 0) {
 968                         unit_unwatch_pid(UNIT(s), s->control_pid);
 969                         s->control_pid = 0;
 970                 }
 971
 972         if (state != SERVICE_START_PRE &&
 973             state != SERVICE_START &&
 974             state != SERVICE_START_POST &&
 975             state != SERVICE_RELOAD &&
 976             state != SERVICE_STOP &&
 977             state != SERVICE_STOP_POST)
 978                 s->control_command = NULL;
 979
 980         if (state == SERVICE_DEAD ||
 981             state == SERVICE_STOP ||
 982             state == SERVICE_STOP_SIGTERM ||
 983             state == SERVICE_STOP_SIGKILL ||
 984             state == SERVICE_STOP_POST ||
 985             state == SERVICE_FINAL_SIGTERM ||
 986             state == SERVICE_FINAL_SIGKILL ||
 987             state == SERVICE_MAINTAINANCE ||
 988             state == SERVICE_AUTO_RESTART)
 989                 service_notify_sockets(s);
 990
 991         if (old_state == state)
 992                 return;
 993
 994         log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 995
 996         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 997 }
 998
 999 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1000         Iterator i;
1001         int r;
1002         int *rfds = NULL;
1003         unsigned rn_fds = 0;
1004         Set *set;
1005         Socket *sock;
1006
1007         assert(s);
1008         assert(fds);
1009         assert(n_fds);
1010
1011         if ((r = service_get_sockets(s, &set)) < 0)
1012                 return r;
1013
1014         SET_FOREACH(sock, set, i) {
1015                 int *cfds;
1016                 unsigned cn_fds;
1017
1018                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1019                         goto fail;
1020
1021                 if (!cfds)
1022                         continue;
1023
1024                 if (!rfds) {
1025                         rfds = cfds;
1026                         rn_fds = cn_fds;
1027                 } else {
1028                         int *t;
1029
1030                         if (!(t = new(int, rn_fds+cn_fds))) {
1031                                 free(cfds);
1032                                 r = -ENOMEM;
1033                                 goto fail;
1034                         }
1035
1036                         memcpy(t, rfds, rn_fds);
1037                         memcpy(t+rn_fds, cfds, cn_fds);
1038                         free(rfds);
1039                         free(cfds);
1040
1041                         rfds = t;
1042                         rn_fds = rn_fds+cn_fds;
1043                 }
1044         }
1045
1046         *fds = rfds;
1047         *n_fds = rn_fds;
1048
1049         set_free(set);
1050
1051         return 0;
1052
1053 fail:
1054         set_free(set);
1055         free(rfds);
1056
1057         return r;
1058 }
1059
1060 static int service_spawn(
1061                 Service *s,
1062                 ExecCommand *c,
1063                 bool timeout,
1064                 bool pass_fds,
1065                 bool apply_permissions,
1066                 bool apply_chroot,
1067                 pid_t *_pid) {
1068
1069         pid_t pid;
1070         int r;
1071         int *fds = NULL;
1072         unsigned n_fds = 0;
1073
1074         assert(s);
1075         assert(c);
1076         assert(_pid);
1077
1078         if (pass_fds)
1079                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1080                         goto fail;
1081
1082         if (timeout) {
1083                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1084                         goto fail;
1085         } else
1086                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1087
1088         if ((r = exec_spawn(c,
1089                             &s->exec_context,
1090                             fds, n_fds,
1091                             apply_permissions,
1092                             apply_chroot,
1093                             UNIT(s)->meta.cgroup_bondings,
1094                             &pid)) < 0)
1095                 goto fail;
1096
1097         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1098                 /* FIXME: we need to do something here */
1099                 goto fail;
1100
1101         free(fds);
1102         *_pid = pid;
1103
1104         return 0;
1105
1106 fail:
1107         free(fds);
1108
1109         if (timeout)
1110                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1111
1112         return r;
1113 }
1114
1115 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1116         int r;
1117         assert(s);
1118
1119         if (!success)
1120                 s->failure = true;
1121
1122         if (allow_restart &&
1123             (s->restart == SERVICE_RESTART_ALWAYS ||
1124              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1125
1126                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1127                         goto fail;
1128
1129                 service_set_state(s, SERVICE_AUTO_RESTART);
1130         } else
1131                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1132
1133         return;
1134
1135 fail:
1136         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1137         service_enter_dead(s, false, false);
1138 }
1139
1140 static void service_enter_signal(Service *s, ServiceState state, bool success);
1141
1142 static void service_enter_stop_post(Service *s, bool success) {
1143         int r;
1144         assert(s);
1145
1146         if (!success)
1147                 s->failure = true;
1148
1149         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1150                 if ((r = service_spawn(s,
1151                                        s->control_command,
1152                                        true,
1153                                        false,
1154                                        !s->permissions_start_only,
1155                                        !s->root_directory_start_only,
1156                                        &s->control_pid)) < 0)
1157                         goto fail;
1158
1159
1160         service_set_state(s, SERVICE_STOP_POST);
1161
1162         if (!s->control_command)
1163                 service_enter_dead(s, true, true);
1164
1165         return;
1166
1167 fail:
1168         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1169         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1170 }
1171
1172 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1173         int r;
1174         bool sent = false;
1175
1176         assert(s);
1177
1178         if (!success)
1179                 s->failure = true;
1180
1181         if (s->main_pid > 0 || s->control_pid > 0) {
1182                 int sig;
1183
1184                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1185
1186                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1187
1188                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1189                                 if (r != -EAGAIN && r != -ESRCH)
1190                                         goto fail;
1191                         } else
1192                                 sent = true;
1193                 }
1194
1195                 if (!sent) {
1196                         r = 0;
1197                         if (s->main_pid > 0) {
1198                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1199                                         r = -errno;
1200                                 else
1201                                         sent = true;
1202                         }
1203
1204                         if (s->control_pid > 0) {
1205                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1206                                         r = -errno;
1207                                 else
1208                                         sent = true;
1209                         }
1210
1211                         if (r < 0)
1212                                 goto fail;
1213                 }
1214         }
1215
1216         service_set_state(s, state);
1217
1218         if (s->main_pid <= 0 && s->control_pid <= 0)
1219                 service_enter_dead(s, true, true);
1220
1221         return;
1222
1223 fail:
1224         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1225
1226         if (sent)  {
1227                 s->failure = true;
1228                 service_set_state(s, state);
1229         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1230                 service_enter_stop_post(s, false);
1231         else
1232                 service_enter_dead(s, false, true);
1233 }
1234
1235 static void service_enter_stop(Service *s, bool success) {
1236         int r;
1237         assert(s);
1238
1239         if (!success)
1240                 s->failure = true;
1241
1242         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1243                 if ((r = service_spawn(s,
1244                                        s->control_command,
1245                                        true,
1246                                        false,
1247                                        !s->permissions_start_only,
1248                                        !s->root_directory_start_only,
1249                                        &s->control_pid)) < 0)
1250                         goto fail;
1251
1252         service_set_state(s, SERVICE_STOP);
1253
1254         if (!s->control_command)
1255                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1256
1257         return;
1258
1259 fail:
1260         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1261         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1262 }
1263
1264 static void service_enter_start_post(Service *s) {
1265         int r;
1266         assert(s);
1267
1268         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1269                 if ((r = service_spawn(s,
1270                                        s->control_command,
1271                                        true,
1272                                        false,
1273                                        !s->permissions_start_only,
1274                                        !s->root_directory_start_only,
1275                                        &s->control_pid)) < 0)
1276                         goto fail;
1277
1278
1279         service_set_state(s, SERVICE_START_POST);
1280
1281         if (!s->control_command)
1282                 service_set_state(s, SERVICE_RUNNING);
1283
1284         return;
1285
1286 fail:
1287         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1288         service_enter_stop(s, false);
1289 }
1290
1291 static void service_enter_start(Service *s) {
1292         pid_t pid;
1293         int r;
1294
1295         assert(s);
1296
1297         assert(s->exec_command[SERVICE_EXEC_START]);
1298         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1299
1300         if ((r = service_spawn(s,
1301                                s->exec_command[SERVICE_EXEC_START],
1302                                s->type == SERVICE_FORKING,
1303                                true,
1304                                true,
1305                                true,
1306                                &pid)) < 0)
1307                 goto fail;
1308
1309         service_set_state(s, SERVICE_START);
1310
1311         if (s->type == SERVICE_SIMPLE) {
1312                 /* For simple services we immediately start
1313                  * the START_POST binaries. */
1314
1315                 s->main_pid = pid;
1316                 s->main_pid_known = true;
1317                 service_enter_start_post(s);
1318
1319         } else  if (s->type == SERVICE_FORKING) {
1320
1321                 /* For forking services we wait until the start
1322                  * process exited. */
1323
1324                 s->control_pid = pid;
1325                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1326         } else if (s->type == SERVICE_FINISH) {
1327
1328                 /* For finishing services we wait until the start
1329                  * process exited, too, but it is our main process. */
1330
1331                 s->main_pid = pid;
1332                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1333         } else
1334                 assert_not_reached("Unknown service type");
1335
1336         return;
1337
1338 fail:
1339         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1340         service_enter_stop(s, false);
1341 }
1342
1343 static void service_enter_start_pre(Service *s) {
1344         int r;
1345
1346         assert(s);
1347
1348         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1349                 if ((r = service_spawn(s,
1350                                        s->control_command,
1351                                        true,
1352                                        false,
1353                                        !s->permissions_start_only,
1354                                        !s->root_directory_start_only,
1355                                        &s->control_pid)) < 0)
1356                         goto fail;
1357
1358         service_set_state(s, SERVICE_START_PRE);
1359
1360         if (!s->control_command)
1361                 service_enter_start(s);
1362
1363         return;
1364
1365 fail:
1366         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1367         service_enter_dead(s, false, true);
1368 }
1369
1370 static void service_enter_restart(Service *s) {
1371         int r;
1372         assert(s);
1373
1374         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1375                 goto fail;
1376
1377         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1378         service_enter_dead(s, true, false);
1379         return;
1380
1381 fail:
1382
1383         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1384         service_enter_dead(s, false, false);
1385 }
1386
1387 static void service_enter_reload(Service *s) {
1388         int r;
1389
1390         assert(s);
1391
1392         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1393                 if ((r = service_spawn(s,
1394                                        s->control_command,
1395                                        true,
1396                                        false,
1397                                        !s->permissions_start_only,
1398                                        !s->root_directory_start_only,
1399                                        &s->control_pid)) < 0)
1400                         goto fail;
1401
1402         service_set_state(s, SERVICE_RELOAD);
1403
1404         if (!s->control_command)
1405                 service_set_state(s, SERVICE_RUNNING);
1406
1407         return;
1408
1409 fail:
1410         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1411         service_enter_stop(s, false);
1412 }
1413
1414 static void service_run_next(Service *s, bool success) {
1415         int r;
1416
1417         assert(s);
1418         assert(s->control_command);
1419         assert(s->control_command->command_next);
1420
1421         if (!success)
1422                 s->failure = true;
1423
1424         s->control_command = s->control_command->command_next;
1425
1426         if ((r = service_spawn(s,
1427                                s->control_command,
1428                                true,
1429                                false,
1430                                !s->permissions_start_only,
1431                                !s->root_directory_start_only,
1432                                &s->control_pid)) < 0)
1433                 goto fail;
1434
1435         return;
1436
1437 fail:
1438         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1439
1440         if (s->state == SERVICE_STOP)
1441                 service_enter_stop_post(s, false);
1442         else if (s->state == SERVICE_STOP_POST)
1443                 service_enter_dead(s, false, true);
1444         else
1445                 service_enter_stop(s, false);
1446 }
1447
1448 static int service_start(Unit *u) {
1449         Service *s = SERVICE(u);
1450
1451         assert(s);
1452
1453         /* We cannot fulfill this request right now, try again later
1454          * please! */
1455         if (s->state == SERVICE_STOP ||
1456             s->state == SERVICE_STOP_SIGTERM ||
1457             s->state == SERVICE_STOP_SIGKILL ||
1458             s->state == SERVICE_STOP_POST ||
1459             s->state == SERVICE_FINAL_SIGTERM ||
1460             s->state == SERVICE_FINAL_SIGKILL)
1461                 return -EAGAIN;
1462
1463         /* Already on it! */
1464         if (s->state == SERVICE_START_PRE ||
1465             s->state == SERVICE_START ||
1466             s->state == SERVICE_START_POST)
1467                 return 0;
1468
1469         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1470
1471         /* Make sure we don't enter a busy loop of some kind. */
1472         if (!ratelimit_test(&s->ratelimit)) {
1473                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1474                 return -EAGAIN;
1475         }
1476
1477         s->failure = false;
1478         s->main_pid_known = false;
1479
1480         service_enter_start_pre(s);
1481         return 0;
1482 }
1483
1484 static int service_stop(Unit *u) {
1485         Service *s = SERVICE(u);
1486
1487         assert(s);
1488
1489         if (s->state == SERVICE_START_PRE ||
1490             s->state == SERVICE_START ||
1491             s->state == SERVICE_START_POST ||
1492             s->state == SERVICE_RELOAD)
1493                 return -EAGAIN;
1494
1495         if (s->state == SERVICE_AUTO_RESTART) {
1496                 service_set_state(s, SERVICE_DEAD);
1497                 return 0;
1498         }
1499
1500         assert(s->state == SERVICE_RUNNING);
1501
1502         service_enter_stop(s, true);
1503         return 0;
1504 }
1505
1506 static int service_reload(Unit *u) {
1507         Service *s = SERVICE(u);
1508
1509         assert(s);
1510
1511         assert(s->state == SERVICE_RUNNING);
1512
1513         service_enter_reload(s);
1514         return 0;
1515 }
1516
1517 static bool service_can_reload(Unit *u) {
1518         Service *s = SERVICE(u);
1519
1520         assert(s);
1521
1522         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1523 }
1524
1525 static UnitActiveState service_active_state(Unit *u) {
1526         assert(u);
1527
1528         return state_translation_table[SERVICE(u)->state];
1529 }
1530
1531 static int main_pid_good(Service *s) {
1532         assert(s);
1533
1534         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1535          * don't know */
1536
1537         /* If we know the pid file, then lets just check if it is
1538          * still valid */
1539         if (s->main_pid_known)
1540                 return s->main_pid > 0;
1541
1542         /* We don't know the pid */
1543         return -EAGAIN;
1544 }
1545
1546 static bool control_pid_good(Service *s) {
1547         assert(s);
1548
1549         return s->control_pid > 0;
1550 }
1551
1552 static int cgroup_good(Service *s) {
1553         assert(s);
1554
1555         if (s->valid_no_process)
1556                 return -EAGAIN;
1557
1558         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1559 }
1560
1561 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1562         Service *s = SERVICE(u);
1563         bool success;
1564
1565         assert(s);
1566         assert(pid >= 0);
1567
1568         success = code == CLD_EXITED && status == 0;
1569         s->failure = s->failure || !success;
1570
1571         if (s->main_pid == pid) {
1572
1573                 exec_status_fill(&s->main_exec_status, pid, code, status);
1574                 s->main_pid = 0;
1575
1576                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1577                         assert(s->exec_command[SERVICE_EXEC_START]);
1578                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1579                 }
1580
1581                 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
1582
1583                 /* The service exited, so the service is officially
1584                  * gone. */
1585
1586                 switch (s->state) {
1587
1588                 case SERVICE_START_POST:
1589                 case SERVICE_RELOAD:
1590                 case SERVICE_STOP:
1591                         /* Need to wait until the operation is
1592                          * done */
1593                         break;
1594
1595                 case SERVICE_START:
1596                         assert(s->type == SERVICE_FINISH);
1597
1598                         /* This was our main goal, so let's go on */
1599                         if (success)
1600                                 service_enter_start_post(s);
1601                         else
1602                                 service_enter_stop(s, false);
1603                         break;
1604
1605                 case SERVICE_RUNNING:
1606                         service_enter_stop(s, success);
1607                         break;
1608
1609                 case SERVICE_STOP_SIGTERM:
1610                 case SERVICE_STOP_SIGKILL:
1611
1612                         if (!control_pid_good(s))
1613                                 service_enter_stop_post(s, success);
1614
1615                         /* If there is still a control process, wait for that first */
1616                         break;
1617
1618                 default:
1619                         assert_not_reached("Uh, main process died at wrong time.");
1620                 }
1621
1622         } else if (s->control_pid == pid) {
1623                 assert(s->control_command);
1624
1625                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1626                 s->control_pid = 0;
1627
1628                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1629
1630                 /* If we are shutting things down anyway we
1631                  * don't care about failing commands. */
1632
1633                 if (s->control_command->command_next &&
1634                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1635
1636                         /* There is another command to *
1637                          * execute, so let's do that. */
1638
1639                         service_run_next(s, success);
1640
1641                 else {
1642                         /* No further commands for this step, so let's
1643                          * figure out what to do next */
1644
1645                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1646
1647                         switch (s->state) {
1648
1649                         case SERVICE_START_PRE:
1650                                 if (success)
1651                                         service_enter_start(s);
1652                                 else
1653                                         service_enter_stop(s, false);
1654                                 break;
1655
1656                         case SERVICE_START:
1657                                 assert(s->type == SERVICE_FORKING);
1658
1659                                 /* Let's try to load the pid
1660                                  * file here if we can. We
1661                                  * ignore the return value,
1662                                  * since the PID file might
1663                                  * actually be created by a
1664                                  * START_POST script */
1665
1666                                 if (success) {
1667                                         if (s->pid_file)
1668                                                 service_load_pid_file(s);
1669
1670                                         service_enter_start_post(s);
1671                                 } else
1672                                         service_enter_stop(s, false);
1673
1674                                 break;
1675
1676                         case SERVICE_START_POST:
1677                                 if (success && s->pid_file && !s->main_pid_known) {
1678                                         int r;
1679
1680                                         /* Hmm, let's see if we can
1681                                          * load the pid now after the
1682                                          * start-post scripts got
1683                                          * executed. */
1684
1685                                         if ((r = service_load_pid_file(s)) < 0)
1686                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1687                                 }
1688
1689                                 /* Fall through */
1690
1691                         case SERVICE_RELOAD:
1692                                 if (success) {
1693                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1694                                                 service_set_state(s, SERVICE_RUNNING);
1695                                         else
1696                                                 service_enter_stop(s, true);
1697                                 } else
1698                                         service_enter_stop(s, false);
1699
1700                                 break;
1701
1702                         case SERVICE_STOP:
1703                                 if (main_pid_good(s) > 0)
1704                                         /* Still not dead and we know the PID? Let's go hunting. */
1705                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1706                                 else
1707                                         service_enter_stop_post(s, success);
1708                                 break;
1709
1710                         case SERVICE_STOP_SIGTERM:
1711                         case SERVICE_STOP_SIGKILL:
1712                                 if (main_pid_good(s) <= 0)
1713                                         service_enter_stop_post(s, success);
1714
1715                                 /* If there is still a service
1716                                  * process around, wait until
1717                                  * that one quit, too */
1718                                 break;
1719
1720                         case SERVICE_STOP_POST:
1721                         case SERVICE_FINAL_SIGTERM:
1722                         case SERVICE_FINAL_SIGKILL:
1723                                 service_enter_dead(s, success, true);
1724                                 break;
1725
1726                         default:
1727                                 assert_not_reached("Uh, control process died at wrong time.");
1728                         }
1729                 }
1730         } else
1731                 assert_not_reached("Got SIGCHLD for unkown PID");
1732 }
1733
1734 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1735         Service *s = SERVICE(u);
1736
1737         assert(s);
1738         assert(elapsed == 1);
1739
1740         assert(w == &s->timer_watch);
1741
1742         switch (s->state) {
1743
1744         case SERVICE_START_PRE:
1745         case SERVICE_START:
1746         case SERVICE_START_POST:
1747         case SERVICE_RELOAD:
1748                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1749                 service_enter_stop(s, false);
1750                 break;
1751
1752         case SERVICE_STOP:
1753                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1754                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1755                 break;
1756
1757         case SERVICE_STOP_SIGTERM:
1758                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1759                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1760                 break;
1761
1762         case SERVICE_STOP_SIGKILL:
1763                 /* Uh, wie sent a SIGKILL and it is still not gone?
1764                  * Must be something we cannot kill, so let's just be
1765                  * weirded out and continue */
1766
1767                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1768                 service_enter_stop_post(s, false);
1769                 break;
1770
1771         case SERVICE_STOP_POST:
1772                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1773                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1774                 break;
1775
1776         case SERVICE_FINAL_SIGTERM:
1777                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1778                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1779                 break;
1780
1781         case SERVICE_FINAL_SIGKILL:
1782                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1783                 service_enter_dead(s, false, true);
1784                 break;
1785
1786         case SERVICE_AUTO_RESTART:
1787                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1788                 service_enter_restart(s);
1789                 break;
1790
1791         default:
1792                 assert_not_reached("Timeout at wrong time.");
1793         }
1794 }
1795
1796 static void service_cgroup_notify_event(Unit *u) {
1797         Service *s = SERVICE(u);
1798
1799         assert(u);
1800
1801         log_debug("%s: cgroup is empty", unit_id(u));
1802
1803         switch (s->state) {
1804
1805                 /* Waiting for SIGCHLD is usually more interesting,
1806                  * because it includes return codes/signals. Which is
1807                  * why we ignore the cgroup events for most cases,
1808                  * except when we don't know pid which to expect the
1809                  * SIGCHLD for. */
1810
1811         case SERVICE_RUNNING:
1812
1813                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1814                         service_enter_stop(s, true);
1815
1816                 break;
1817
1818         default:
1819                 ;
1820         }
1821 }
1822
1823 static int service_enumerate(Manager *m) {
1824         char **p;
1825         unsigned i;
1826         DIR *d = NULL;
1827         char *path = NULL, *fpath = NULL, *name = NULL;
1828         int r;
1829
1830         assert(m);
1831
1832         STRV_FOREACH(p, m->sysvrcnd_path)
1833                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1834                         struct dirent *de;
1835
1836                         free(path);
1837                         path = NULL;
1838                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1839                                 r = -ENOMEM;
1840                                 goto finish;
1841                         }
1842
1843                         if (d)
1844                                 closedir(d);
1845
1846                         if (!(d = opendir(path))) {
1847                                 if (errno != ENOENT)
1848                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1849
1850                                 continue;
1851                         }
1852
1853                         while ((de = readdir(d))) {
1854                                 Unit *runlevel, *service;
1855
1856                                 if (ignore_file(de->d_name))
1857                                         continue;
1858
1859                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1860                                         continue;
1861
1862                                 if (strlen(de->d_name) < 4)
1863                                         continue;
1864
1865                                 free(fpath);
1866                                 fpath = NULL;
1867                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1868                                         r = -ENOMEM;
1869                                         goto finish;
1870                                 }
1871
1872                                 if (access(fpath, X_OK) < 0) {
1873
1874                                         if (errno != ENOENT)
1875                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1876
1877                                         continue;
1878                                 }
1879
1880                                 free(name);
1881                                 name = NULL;
1882                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1883                                         r = -ENOMEM;
1884                                         goto finish;
1885                                 }
1886
1887                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1888                                         goto finish;
1889
1890                                 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1891                                         goto finish;
1892
1893                                 if (de->d_name[0] == 'S') {
1894                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1895                                                 goto finish;
1896
1897                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1898                                                 goto finish;
1899
1900                                 } else if (de->d_name[0] == 'K' &&
1901                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1902                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1903
1904                                         /* We honour K links only for
1905                                          * halt/reboot. For the normal
1906                                          * runlevels we assume the
1907                                          * stop jobs will be
1908                                          * implicitly added by the
1909                                          * core logic. */
1910
1911                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1912                                                 goto finish;
1913
1914                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1915                                                 goto finish;
1916                                 }
1917                         }
1918                 }
1919
1920         r = 0;
1921
1922 finish:
1923         free(path);
1924         free(fpath);
1925         free(name);
1926         closedir(d);
1927
1928         return r;
1929 }
1930
1931 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1932         [SERVICE_DEAD] = "dead",
1933         [SERVICE_START_PRE] = "start-pre",
1934         [SERVICE_START] = "start",
1935         [SERVICE_START_POST] = "start-post",
1936         [SERVICE_RUNNING] = "running",
1937         [SERVICE_RELOAD] = "reload",
1938         [SERVICE_STOP] = "stop",
1939         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1940         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1941         [SERVICE_STOP_POST] = "stop-post",
1942         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1943         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1944         [SERVICE_MAINTAINANCE] = "maintainance",
1945         [SERVICE_AUTO_RESTART] = "auto-restart",
1946 };
1947
1948 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1949
1950 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1951         [SERVICE_ONCE] = "once",
1952         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1953         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1954 };
1955
1956 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1957
1958 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1959         [SERVICE_FORKING] = "forking",
1960         [SERVICE_SIMPLE] = "simple",
1961         [SERVICE_FINISH] = "finish"
1962 };
1963
1964 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1965
1966 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1967         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1968         [SERVICE_EXEC_START] = "ExecStart",
1969         [SERVICE_EXEC_START_POST] = "ExecStartPost",
1970         [SERVICE_EXEC_RELOAD] = "ExecReload",
1971         [SERVICE_EXEC_STOP] = "ExecStop",
1972         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1973 };
1974
1975 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1976
1977 const UnitVTable service_vtable = {
1978         .suffix = ".service",
1979
1980         .init = service_init,
1981         .done = service_done,
1982
1983         .dump = service_dump,
1984
1985         .start = service_start,
1986         .stop = service_stop,
1987         .reload = service_reload,
1988
1989         .can_reload = service_can_reload,
1990
1991         .active_state = service_active_state,
1992
1993         .sigchld_event = service_sigchld_event,
1994         .timer_event = service_timer_event,
1995
1996         .cgroup_notify_empty = service_cgroup_notify_event,
1997
1998         .enumerate = service_enumerate
1999 };